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2013年

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Accession number:20133516674501

Title:Transductive face sketch-photo synthesis

Authors:Wang, Nannan (1); Tao, Dacheng (2); Gao, Xinbo (1); Li, Xuelong (3); Li, Jie (1)

Author affiliation:(1) VIPS Laboratory, School of Electronic Engineering, Xidian University, Xi'an 710071, China; (2) Centre for Quantum Computation and Intelligent Systems, Faculty of Engineering and Information Technology, University of Technology of Sydney, Ultimo, NSW 2007, Australia; (3) Center for OPTical IMagery Analysis and Learning, State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an 710119, China

Source title:IEEE Transactions on Neural Networks and Learning Systems

Abbreviated source title:IEEE Trans. Neural Networks Learn. Sys.

Volume:24

Issue:9

Issue date:2013

Publication year:2013

Pages:1364-1376

Article number:6515363

Language:English

ISSN:2162237X

E-ISSN:21622388

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., 445 Hoes Lane / P.O. Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:Face sketch-photo synthesis plays a critical role in many applications, such as law enforcement and digital entertainment. Recently, many face sketch-photo synthesis methods have been proposed under the framework of inductive learning, and these have obtained promising performance. However, these inductive learning-based face sketch-photo synthesis methods may result in high losses for test samples, because inductive learning minimizes the empirical loss for training samples. This paper presents a novel transductive face sketch-photo synthesis method that incorporates the given test samples into the learning process and optimizes the performance on these test samples. In particular, it defines a probabilistic model to optimize both the reconstruction fidelity of the input photo (sketch) and the synthesis fidelity of the target output sketch (photo), and efficiently optimizes this probabilistic model by alternating optimization. The proposed transductive method significantly reduces the expected high loss and improves the synthesis performance for test samples. Experimental results on the Chinese University of Hong Kong face sketch data set demonstrate the effectiveness of the proposed method by comparing it with representative inductive learning-based face sketch-photo synthesis methods. © 2012 IEEE.

Number of references:50

Main heading:Learning systems

Controlled terms:Optimization - Quadratic programming

Uncontrolled terms:Alternating optimizations - Chinese universities - Digital entertainment - Face sketch-photo synthesis - Inductive learning - Probabilistic graph models - Probabilistic modeling - Transductive learning

Classification code:731.5 Robotics - 921.5 Optimization Techniques

DOI:10.1109/TNNLS.2013.2258174

Database:Compendex

Accession number:20134716989997

Title:Comparison of timing noise properties of carbon nanotubes, graphene and graphene oxide as saturable absorbers for a mode-locked Er-doped fiber laser

Authors:Li, Xiaohui (1); Wu, Kan (2); Shum, Perry Ping (2); Wang, Yonggang (3); Wang, Yishan (3); Wang, Qijie (1)

Author affiliation:(1) School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Ave., 639798, Singapore; (2) Centre for Disruptive Photonic Technologies, Nanyang Technological University, 21 Nanyang Link, 63737, Singapore; (3) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Wang, Q.(qjwang@ntu.edu.sg)

Source title:CLEO: Science and Innovations, CLEO_SI 2013

Abbreviated source title:Sci. Innov.

Monograph title:CLEO: Science and Innovations, CLEO_SI 2013

Issue date:2013

Publication year:2013

Pages:JTu4A.06

Language:English

ISBN-13:9781557529725

Document type:Conference article (CA)

Conference name:CLEO: Science and Innovations, CLEO_SI 2013

Conference date:June 9, 2013 - June 14, 2013

Conference location:San Jose, CA, United states

Conference code:100548

Publisher:Optical Society of American (OSA), 2010 Massachusetts Ave, NW, Washington, DC, DC 20036, United States

Abstract:We compare the timing noise properties of three most typical carbon materials, i.e., single walled carbon nanotubes, graphene and graphene oxide as saturable absorbers in a passively mode-locked Er-doped fiber laser as a test platform. © OSA 2013.

Number of references:4

Main heading:Graphene

Controlled terms:Carbon nanotubes - Erbium - Fiber lasers - Locks (fasteners) - Mode-locked fiber lasers - Passive mode locking - Saturable absorbers

Uncontrolled terms:Carbon material - Er-doped fiber laser - Graphene oxides - Mode-locked - Passively mode-locked - Test platforms - Timing noise

Classification code:547.2 Rare Earth Metals - 601.3 Mechanisms - 744.1 Lasers, General - 744.4 Solid State Lasers - 761 Nanotechnology - 804 Chemical Products Generally

Database:Compendex

Accession number:20133616692157

Title:Comparison of fused silica and oxyfluoride glass on laser induced initial damage morphology

Authors:Cheng, Qiang (1); Huang, Jin (2); Zhou, Xinda (2); Sun, Laixi (2); Jiang, Xiaodong (2); Sui, Zhan (2); Hou, Chaoqi (3); Wei, Wei (1); Peng, Bo (1)

Author affiliation:(1) Institute of Optoelectronics Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210046, China; (2) Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Xi'an 710119, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8786

Monograph title:Pacific Rim Laser Damage 2013: Optical Materials for High Power Lasers

Issue date:2013

Publication year:2013

Article number:878604

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819496027

Document type:Conference article (CA)

Conference name:Pacific Rim Laser Damage 2013: Optical Materials for High Power Lasers

Conference date:May 19, 2013 - May 22, 2013

Conference location:Shanghai, China

Conference code:98816

Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE); Shanghai Institute of Optics and Fine Mechanics (SIOM); SCHOTT; OptoTech Germany; PulsePower

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:A novel oxyfluoride glass (OFG) was prepared. The laser induced damage threshold (LIDT) of the novel OFG is 24.9% higher than fused silica under 355nm nanosecond laser irradiation by R-on-1 procedure. Characterization by optical microscope and scanning electron microscope shows that the initial damage morphologies of two kind of materials are significantly different. Experiment results indicate that the novel OFG can be a good candidate component material for high energy laser applications. © 2013 SPIE.

Number of references:15

Main heading:Laser damage

Controlled terms:Fused silica - Glass - High energy lasers - High power lasers - Laser applications - Morphology - Optical materials - Scanning electron microscopy

Uncontrolled terms:Component materials - Initial damage - Laser induced - Laser induced damage thresholds - Oxy-fluoride glass

Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems - 744 Lasers - 812.3 Glass - 951 Materials Science

DOI:10.1117/12.2019995

Database:Compendex

Accession number:20131316153590

Title:Detecting method of right-angled prism tilting

Authors:Zhao, Junli (1); Wu, Yiming (1); Gao, Limin (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Zhao, J.(zhao.junli@163.com)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:42

Issue:1

Issue date:January 2013

Publication year:2013

Pages:228-232

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:In the azimuth aiming system, the sensitive-axis direction of inertial unit is monitored usually with the help of right-angled prism. The azimuth aiming error was produced by the right-angled prism tilting, through building the mathematical model of the influence of prism tilting on the aiming accuracy, the accurate vector expression was founded, in addition, the conventional measuring way and technique were introduced, furthermore, a new detecting and calibrating method of prism tilting based on the rhombic prism was studied, and some leading causes that affecting the measuring accuracy of the system were discussed. Then, experiment platform was built based on our own rhombic-equipment. The acquired data proves that the measurement results are greatly influenced by the device level state along the direction of prism titling, the calibrated system has achieved high measuring accuracy less than 10″. At the same time, this new system has obvious advantages on high measuring efficiency, and can be operated very simply and conveniently, it has a very important practical significance to improve the azimuth aiming precision.

Number of references:8

Main heading:Prisms

Controlled terms:Error analysis - Mathematical models

Uncontrolled terms:Aiming systems - Detecting methods - Experiment platforms - Inertial units - Measurement results - Measuring accuracy

Classification code:741.3 Optical Devices and Systems - 921 Mathematics - 921.6 Numerical Methods

Database:Compendex

Accession number:20141317516412

Title:Optical system design of polarization imaging spectrometer for ground-based astronomical observation

Authors:Chang, Ling-Ying (1); Yao, Da-Wei (2); Zhao, Bao-Chang (2); Qiu, Yue-Hong (2)

Author affiliation:(1) Xi'an University of post and Telecommunications, Xi'an 710121, China; (2) Xi'an Institute Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8910

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Spectrometer Technologies and Applications

Issue date:2013

Publication year:2013

Article number:89101Z

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497796

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:With the development of astrophysics, the astrophysics demands are higher and higher. Astronomical spectral polarization observation can obtain more object information to provide comprehensive data for further research. A polarization imaging spectrometer based on acousto-optic tunable filter was developed for ground-based telescope, which can obtain the image spectral polarization information at the same time. In this paper, first, the work principle of AOTF was introduced, then described the AOTF imaging system for ground-based astronomical observation, it covers the spectral band from 450nm to 900nm. The device can provide about 3.6° view field angle and 10mm aperture, which included TeO<inf>2</inf> crystal, image optical system, a charged coupled device(CCD)camera, rf electronics and control and processing software. Finally the paper presented the results of optical design. © 2013 SPIE.

Number of references:8

Main heading:Polarization

Controlled terms:Astrophysics - Optical design - Optical systems - Spectrometers - Spectroscopy - Telescopes

Uncontrolled terms:Acousto-optic tunable filters - AOTF - Astronomical observation - Ground-based telescopes - Hyperspectral Imaging - Imaging spectrometers - Polarization imaging - Spectral polarization

Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems - 801 Chemistry - 931.1 Mechanics

DOI:10.1117/12.2034993

Database:Compendex

Accession number:20141317501124

Title:An all-optical encryption system for multi-wave signals

Authors:Duan, Jie (1); Wen, Yu (1); Duan, Tao (2); Xie, Xiaoping (1)

Author affiliation:(1) Xi'an Telecommunication College, Xi'an 710106, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an 710119, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8906

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Laser Communication Technologies and Systems

Issue date:2013

Publication year:2013

Article number:89060E

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497758

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:An all-optical encryption system which can be used in fiber WDM system and directly encrypt multi-wave optical signals is proposed. This scheme achieves multi-wave signals encrypting by the technology of generating coherently multi-wave optical plain text, Key text and the technology of phase shift interference. The feasibility and validity of this encrypting scheme are verified by simulative experiment for multi-wave signals at 8x10Gbps with wavelength interval of 0.8nm, the simulative result shows that when the input Pi and Ki is Gauss pulse with duty cycle of 0.3, the bit error rate and Q factor of encryption output are 0 and 164 respectively. Theory analysis and simulative experiment shows the scheme is feasible and efficient. © 2013 Copyright SPIE.

Number of references:17

Main heading:Cryptography

Controlled terms:Experiments - Signal detection

Uncontrolled terms:All-optical XOR gate - Encryption system - Gauss pulse - Interference effects - Optical signals - Plain text - Wave divisions - WDM systems

Classification code:716 Telecommunication; Radar, Radio and Television - 716.1 Information Theory and Signal Processing - 717 Optical Communication - 718 Telephone Systems and Related Technologies; Line Communications - 723 Computer Software, Data Handling and Applications - 901.3 Engineering Research

DOI:10.1117/12.2032218

Database:Compendex

Accession number:20134316904298

Title:Watt-level passively Q-switched double-cladding fiber laser based on graphene oxide saturable absorber

Authors:Yu, Zhenhua (1); Song, Yanrong (1); Dong, Xinzheng (1); Li, Yanlin (1); Tian, Jinrong (1); Wang, Yonggang (2)

Author affiliation:(1) Institute of Information Photonics Technology, College of Applied Sciences, Beijing University of Technology, Beijing 100124, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Song, Y.(yrsong@bjut.edu.cn)

Source title:Applied Optics

Abbreviated source title:Appl. Opt.

Volume:52

Issue:29

Issue date:October 10, 2013

Publication year:2013

Pages:7127-7131

Language:English

ISSN:1559128X

E-ISSN:15394522

CODEN:APOPAI

Document type:Journal article (JA)

Publisher:Optical Society of American (OSA)

Abstract:A watt-level passively Q-switched ytterbium-doped double-cladding fiber laser with a graphene oxide (GO) absorber was demonstrated. The structure of the GO saturable absorber mirror (GO-SAM) was of the sandwich type. A maximum output power of 1.8 W was obtained around a wavelength of 1044 nm. To the best of our knowledge, this is the highest output power in Q-switched fiber lasers based on a GO saturable absorber. The pure GO was protected from the oxygen in the air so that the damage threshold of the GO-SAM was effectively raised. The gain fiber was a D-shaped ytterbium-doped doublecladding fiber. The pulse repetition rates were tuned from 120 to 215 kHz with pump powers from 3.89 to 7.8 W. The maximum pulse energy was 8.37 μJ at a pulse width of 1.7 μs. © 2013 Optical Society of America.

Number of references:23

Main heading:Q switching

Controlled terms:Cladding (coating) - Fiber lasers - Graphene - Optical pumping - Saturable absorbers - Ytterbium

Uncontrolled terms:Damage threshold - Double cladding fiber - Graphene oxides - Maximum output power - Passively Q-switched - Q-switched fiber lasers - Saturable absorber mirrors - Ytterbium-doped

Classification code:535.1 Metal Rolling - 547.2 Rare Earth Metals - 741.1 Light/Optics - 741.1.2 Fiber Optics - 744 Lasers - 761 Nanotechnology - 804 Chemical Products Generally

DOI:10.1364/AO.52.007127

Database:Compendex

Accession number:20141317516357

Title:Alignment off-axis optical system using nodal aberration theory

Authors:Jiang, Bo (1); Zhou, Si-Zhong (1); Jiang, Kai (1); Fu, Huai-Yang (1); Mei, Chao (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, China Academy of Sciences, Xi'an 710119, China; (2) Graduate University, Chinese Academy of Sciences, Beijing 100039, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8910

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Spectrometer Technologies and Applications

Issue date:2013

Publication year:2013

Article number:89100E

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497796

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:We present the Fringe Zernike coefficients of the parent system pupil can be converted into coefficients of off-axis system, it is show that the coefficients of the Fringe Zernike polynomials in the off-axis pupil only contain orders equal to or lower than the Fringe Zernike polynomials originally placed on the parent pupil, and for the 3rd aberration the pupil transformation matrix has been finding. Using nodal aberration, we get the misaligned matrix of rotational symmetry parent optical system. Then with the pupil transformation matrix, the misaligned matrix of off-axis two-mirror system was found, the amounts of the misalignments are calculated by the off-axis misaligned matrix. © 2013 SPIE.

Number of references:14

Main heading:Linear transformations

Controlled terms:Alignment - Optical systems - Polynomials

Uncontrolled terms:Aberration theory - Misalignment - Off-axis - Rotational symmetries - Transformation matrices - Zernike coefficient - Zernike polynomials

Classification code:601.1 Mechanical Devices - 741.3 Optical Devices and Systems - 921.1 Algebra - 921.3 Mathematical Transformations

DOI:10.1117/12.2032379

Database:Compendex

Accession number:20135017079648

Title:Theoretical and experimental study of 37-core waveguides with large mode area

Authors:Wang, Ping (1); Cheng, Guanghua (3); Yi, Ruimin (1); Liu, Xin (3); Shang, Tao (1); Wang, Zhansheng (1); Guo, Lixin (2)

Author affiliation:(1) State Key Laboratory of Integrated Service Networks, School of Telecommunications Engineering, Xidian University, Xi'an 710071, China; (2) School of Science, Xidian University, Xi'an 710071, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Wang, P.(pingwang@xidian.edu.cn)

Source title:Applied Optics

Abbreviated source title:Appl. Opt.

Volume:52

Issue:33

Issue date:November 20, 2013

Publication year:2013

Pages:7981-7986

Language:English

ISSN:1559128X

E-ISSN:15394522

CODEN:APOPAI

Document type:Journal article (JA)

Publisher:Optical Society of American (OSA)

Abstract:The evanescently coupled multicore waveguide lattice composed of 37 linear type I cores hexagonally arranged has been theoretically studied and fabricated by low-repetition-rate femtosecond laser inscription of bulk fused silica. The effects of the single core´s numerical apertures (NAs) and spacing on the mode characteristics of the 37-core waveguide were calculated by the finite-element method. It was found that the mode field areas of the fundamental mode LP<inf>01</inf> with 5 &mu;m spacing of different NAs were all larger than 577 &mu;m2, which was confirmed by the experiments. The measured near-field mode profiles for different writing conditions and different spacing also showed that the waveguide supported both a single mode (LP <inf>01</inf>) and two modes (LP<inf>01</inf> and LP<inf>11</inf>). The multicore waveguide, according to our study, is particularly interesting for mode converters. © 2013 Optical Society of America.

Number of references:33

Main heading:Waveguides

Controlled terms:Finite element method - Numerical methods

Uncontrolled terms:Femtosecond laser inscriptions - Fundamental modes - Large mode area - Mode characteristics - Mode converter - Mode field area - Mode profiles - Numerical aperture

Classification code:714.3 Waveguides - 921.6 Numerical Methods

DOI:10.1364/AO.52.007981

Database:Compendex

Accession number:20132016340402

Title:The improved design of encoding mask and the correcting method for recovered spectral images in Hadamard transform spectral imager based on DMD

Authors:Xu, Jun (1); Xie, Cheng-Wang (2); Liu, Hai-Wen (1); Liu, Qiang (3); Li, Bin-Cheng (4)

Author affiliation:(1) School of Information Engineering, East China Jiaotong University, Nanchang 330013, China; (2) School of Software, East China Jiaotong University, Nanchang 330013, China; (3) Key Laboratory of Spectral Imaging Technique, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (4) Key Laboratory of Beam Control, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China

Corresponding author:Xu, J.(xjsdcq@163.com)

Source title:Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis

Abbreviated source title:Guang Pu Xue Yu Guang Pu Fen Xi

Volume:33

Issue:5

Issue date:May 2013

Publication year:2013

Pages:1419-1423

Language:Chinese

ISSN:10000593

CODEN:GYGFED

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:A novel type of DMD-based Hadamard transform spectral imager is introduced. Taking the 7-order S-matrix as an example for discussion, the present paper develops an improved design of Hadamard encoding mask, which makes the dispersed spectrum of all pixels to be encoded by seven elements strictly. A correcting method for the recovered spectral images is proposed, and eventually 6 high-quality spectral images are obtained when Hadamard transform spectral imager operates based on 7-order S-matrix. Similarly, if the spectral imager operates based on n-order S-matrix, n-1 spectral images can be obtained. The experimental results show that the improved design and the correction method are feasible and effective.

Number of references:11

Main heading:Spectroscopy

Controlled terms:Design - Encoding (symbols) - Hadamard transforms - Image coding - Scattering parameters

Uncontrolled terms:Correcting method - Correction method - DMD - Encoding masks - High quality - Improved designs - Spectral imager - Spectral images

Classification code:408 Structural Design - 703.1 Electric Networks - 723.2 Data Processing and Image Processing - 801 Chemistry - 921.1 Algebra

DOI:10.3964/j.issn.1000-0593(2013)05-1419-05

Database:Compendex

Accession number:20134216857687

Title:Improved design of support for large aperture space lightweight mirror

Authors:Wang, Chao (1); Ruan, Ping (1); Liu, Qimin (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, 710119, China; (2) University of Chinese Academy of Sciences, Beijing, 100049, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8908

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Sensors and Applications

Issue date:2013

Publication year:2013

Article number:89081P

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497772

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:In order to design a kind of rational large aperture space mirror which can adapt to the space gravity and thermal environment, by taking the choice of material, the lightweight of the mirror and the design of support into account in detail, a double-deck structure with traditional flexible hinge was designed, then the analytical mathematical model of the mirror system was established. The design adopts six supports on back. in order to avoid the constraints, mirror is connected to three middle transition pieces through six flexible hinges, and then the three transition pieces are connected to support plate through another three flexible hinges. However, the initial structure is unable to reach the expected design target and needs to be made further adjustments. By improving and optimizing the original structure, a new type of flexible hinge in the shape of the letter A is designed finally. Compared with the traditional flexible hinge structure, the new structure is simpler and has less influence on the surface figure accuracy of mirror. By using the finite element analysis method, the static and dynamic characteristics as well as the thermal characteristics of the mirror system are analyzed. Analysis results show that the maximum PV value is 37 nm and the maximum RMS value is 10.4 nm when gravity load is applied. Furthermore, the maximum PV value is 46 nm and the maximum RMS value is 10.5 nm under the load case of gravity coupled with 4a&circ;.,uniform temperature rise. The results satisfy the index of optical design. The first order natural frequency of the mirror component is 130 Hz according to the conclusion obtained by modal analytical solution, so the mirror structure has high enough fundamental frequency. And, the structural strength can meet the demand under the overload and the random vibration environment respectively. It indicates that the mirror component structure has enough dynamic, static stiffness and thermal stability, meeting the design requirements. © 2013 SPIE.

Number of references:13

Main heading:Mirrors

Controlled terms:Finite element method - Hinges - Mathematical models - Natural frequencies - Optical design

Uncontrolled terms:Finite element analysis method - First order natural frequency - Flexible hinge structures - Flexible supports - lightweight - Optimum designs - Static and dynamic characteristics - Surface figure accuracies

Classification code:605 Small Tools and Hardware - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 921 Mathematics - 921.6 Numerical Methods

DOI:10.1117/12.2034456

Database:Compendex

Accession number:20124615668441

Title:Transfer learning for pedestrian detection

Authors:Cao, Xianbin (1); Wang, Zhong (2); Yan, Pingkun (3); Li, Xuelong (3)

Author affiliation:(1) BeiHang University, Beijing, 100083, China; (2) University of Science and Technology of China, Hefei, 230026, China; (3) Center for Optical Imagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China

Corresponding author:Yan, P.(pingkun@gmail.com)

Source title:Neurocomputing

Abbreviated source title:Neurocomputing

Volume:100

Issue date:January 16, 2013

Publication year:2013

Pages:51-57

Language:English

ISSN:09252312

E-ISSN:18728286

CODEN:NRCGEO

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:Most of the existing methods for pedestrian detection work well, only when the following assumption is satisfied: the features extracted from the training dataset and the testing dataset have very similar distributions in the feature space. However, in practice, this assumption does not hold because of the scene complexity and variation. In this paper, a new method is proposed for detecting pedestrians in various scenes based on the transfer learning technique. Our proposed method employs the following two strategies for improving the pedestrian detection performance. First, a new sample screening method based on manifold learning is proposed. The basic idea is to choose samples from the training set, which may be similar to the samples from the unseen scene, and then merge the selected samples into the unseen set. Second, a new classification model based on transfer learning is proposed. The advantage of the classification model is that only a small number of samples need to be used from the unseen scenes. Most of the training samples are still obtained from the training scene, which take up to 90% of the entire training samples. Compared to the traditional pedestrian detection methods, the proposed algorithm can adapt to different scenes for detecting pedestrians. Experiments on two pedestrian detection benchmark datasets, DC and NICTA, showed that the method can obtain better performance as compared to other previous methods. © 2012 Elsevier B.V.

Number of references:31

Main heading:Screening

Controlled terms:Benchmarking - Sampling - Statistical tests

Uncontrolled terms:Benchmark datasets - Classification models - Data sets - Feature space - Manifold learning - Number of samples - Pedestrian detection - Scene change - Scene complexity - Screening methods - Training dataset - Training sample - Training sets - Transfer learning

Classification code:524 Solid Fuels - 801 Chemistry - 912 Industrial Engineering and Management - 913 Production Planning and Control; Manufacturing - 922.2 Mathematical Statistics

DOI:10.1016/j.neucom.2011.12.043

Database:Compendex

Accession number:20134216859393

Title:Global structure constrained local shape prior estimation for medical image segmentation

Authors:Yan, Pingkun (1); Zhang, Wuxia (1); Turkbey, Baris (2); Choyke, Peter L. (2); Li, Xuelong (1)

Author affiliation:(1) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an, 710119 Shaanxi, China; (2) National Institutes of Health, National Cancer Institute, Bethesda, MD 20892, United States

Corresponding author:Yan, P.(pingkun@ieee.org)

Source title:Computer Vision and Image Understanding

Abbreviated source title:Comput Vision Image Understanding

Volume:117

Issue:9

Issue date:2013

Publication year:2013

Pages:1017-1026

Language:English

ISSN:10773142

E-ISSN:1090235X

CODEN:CVIUF4

Document type:Journal article (JA)

Publisher:Academic Press Inc., 1250 Sixth Avenue, San Diego, California, CA 92101, United States

Abstract:Organ shape plays an important role in clinical diagnosis, surgical planning and treatment evaluation. Shape modeling is a critical factor affecting the performance of deformable model based segmentation methods for organ shape extraction. In most existing works, shape modeling is completed in the original shape space, with the presence of outliers. In addition, the specificity of the patient was not taken into account. This paper proposes a novel target-oriented shape prior model to deal with these two problems in a unified framework. The proposed method measures the intrinsic similarity between the target shape and the training shapes on an embedded manifold by manifold learning techniques. With this approach, shapes in the training set can be selected according to their intrinsic similarity to the target image. With more accurate shape guidance, an optimized search is performed by a deformable model to minimize an energy functional for image segmentation, which is efficiently achieved by using dynamic programming. Our method has been validated on 2D prostate localization and 3D prostate segmentation in MRI scans. Compared to other existing methods, our proposed method exhibits better performance in both studies. © 2013 Elsevier Inc. All rights reserved.

Number of references:34

Main heading:Medical image processing

Controlled terms:Deformation - Diagnosis - Image segmentation - Medical imaging

Uncontrolled terms:3d prostate segmentations - Better performance - Clinical diagnosis - Deformable modeling - Manifold assumption - Manifold learning - Prostate localization - Shape model

Classification code:421 Strength of Building Materials; Mechanical Properties - 422 Strength of Building Materials; Test Equipment and Methods - 461.6 Medicine and Pharmacology - 723.2 Data Processing and Image Processing

DOI:10.1016/j.cviu.2013.03.006

Database:Compendex

Accession number:20131616213975

Title:Laboratory radiation calibration method of Hadamard transform imaging spectrometer

Authors:Bai, Junke (1); Liu, Xuebin (1); Yan, Peng (1); Hu, Bingliang (1)

Corresponding author:Bai, J.(jakeybai@163.com)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:42

Issue:2

Issue date:February 2013

Publication year:2013

Pages:503-506

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:Hadamard transform imaging spectrometer is a multi-channel detection digital transform spectrometer detection technology. The spectromter used this technology to achieving spectral imaging. Based on the digital micromirror array device of the Hadamard transform spectrometer working principles and the instrument, a series of precision laboratory calibration methods were researched and employed for the Hadamard transform imaging spectrometer. A point light source in long distance was used for the pixel response nonuniformity correction of the CMOS detector. The uncertainty of the relative calibration was 4.6%. Solar simulator and spectral radiometer were used in absolute radiation calibration of the whole system, and the uncertainty of the absolute radiation calibration was 8.92%. Both of the uncertainty of relative calibration and the uncertainty of the absolute radiation calibration met the requirements of the projection. By actual objects imaging, the laboratory calibration methods of the Hadamard transform imaging spectrometer are proved accurate.

Number of references:8

Main heading:Calibration

Controlled terms:CMOS integrated circuits - Hadamard transforms - Light sources - Spectrometers - Spectroscopy

Uncontrolled terms:Absolute calibration - Digital micromirror arrays - Digital transform spectrometers - Hadamard - Hadamard transform spectrometers - Nonuniformity correction - Radiation calibration - Relative calibrations

Database:Compendex

Accession number:20132416417760

Title:Two-photon fluorescence stereomicroscopy with bessel beams

Authors:Yang, Yanlong (1); Lei, Ming (1); Zheng, Juanjuan (1); Li, Runze (1); Yan, Shaohui (1); Yao, Baoli (1); Ye, Tong (1)

Corresponding author:Ye, T.(tongtye@gmail.com)

Source title:Progress in Biomedical Optics and Imaging - Proceedings of SPIE

Abbreviated source title:Progr. Biomed. Opt. Imaging Proc. SPIE

Volume:8588

Monograph title:Multiphoton Microscopy in the Biomedical Sciences XIII

Issue date:2013

Publication year:2013

Article number:85882K

Language:English

ISSN:16057422

ISBN-13:9780819493576

Document type:Conference article (CA)

Conference name:Multiphoton Microscopy in the Biomedical Sciences XIII

Conference date:February 3, 2013 - February 5, 2013

Conference location:San Francisco, CA, United states

Conference code:97277

Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE); Becker and Hickel GmbH; Boston Electronics Corporation; Coherent, Inc.; Intelligent Software Solutions, Inc.

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:Three dimensional distributions of cells can be usually acquired by optical sectioning methods, such as multiphoton excitation and confocal fluorescence laser scanning microscopy. Though the lateral scan rates can reach up to several kHz, the relatively slow axial scan comprises the speed of real-time imaging of a volume. Here we propose a three dimensional imaging method that uses Bessel beams as excitation in multiphoton fluorescence microscopy. The extended focus of the Bessel beam allows recording a volume of cells without scanning the depth. The depth information can be retrieved by recording a pair of parallax views of the same volume. We have demonstrated the stereoscope capability on a homebuilt two-photon fluorescence microscope. © 2013 SPIE.

Number of references:13

Main heading:Laser beams

Controlled terms:Bessel functions - Fluorescence - Fluorescence microscopy - Geometrical optics - Optical waveguides - Photography - Photons - Three dimensional

Uncontrolled terms:Bessel beam - Confocal fluorescence - Extended depth of field - Laser scanning microscopy - Multiphoton excitation - Multiphoton fluorescence microscopy - Three dimensional imaging - Two photon fluorescence

Classification code:921 Mathematics - 902.1 Engineering Graphics - 746 Imaging Techniques - 744.8 Laser Beam Interactions - 741.3 Optical Devices and Systems - 741.1 Light/Optics - 461.9.1 Immunology

DOI:10.1117/12.2002850

Database:Compendex

Accession number:20135217127635

Title:Subwavelength multiple focal spots produced by tight focusing the patterned vector optical fields

Authors:Cai, Mengqiang (1); Tu, Chenghou (1); Zhang, Huihui (1); Qian, Shengxia (1); Lou, Kai (1); Li, Yongnan (1); Wang, Hui-Tian (1)

Author affiliation:(1) MOE Key Laboratory of Weak Light Nonlinear Photonics, School of Physics, Nankai University, Tianjin 300071, China; (2) National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China; (3) State Key Laboratory of Transient Optics and Photonics Technology, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Source title:Optics Express

Abbreviated source title:Opt. Express

Volume:21

Issue:25

Issue date:December 16, 2013

Publication year:2013

Pages:31469-31482

Language:English

E-ISSN:10944087

Document type:Journal article (JA)

Publisher:Optical Society of America, 2010 Massachusetts Ave, NW, Washington, DC, DC 20036-1023, United States

Abstract:We numerically and experimentally explored generation and regulation of subwavelength multiple focal spots produced by tight focusing patterned vector optical fields (PVOFs). We presented a modified Richard-Wolf diffraction integration method suitable for the tight focusing of the PVOFs. By tailoring the spatial geometry and the polarization distributions of the PVOFs, simulations show that the diverse spatial configurations of subwavelength multiple focal spots can be achieved. To verify our idea, we experimentally generated the theoretically calculated examples of femtosecond PVOFs, then tightly focused them on the surface of the crystalline silicon wafers, and finally characterized the morphologies of modified surfaces. The SEM (scanning electronic microscopy) images confirmed that the experimental results are in good agreement with the simulations. Based on the diverse controlling degrees of freedom of PVOFs, the resultant subwavelength focal fields are flexible and powerful in parallel processing, optical manipulation and so on. © 2013 Optical Society of America.

Number of references:24

Main heading:Optics

Controlled terms:Optical constants

Uncontrolled terms:Crystalline silicon wafers - Integration method - Modified surfaces - Optical manipulation - Parallel processing - Polarization distributions - Scanning electronic microscopy - Spatial configuration

Classification code:741.1 Light/Optics

DOI:10.1364/OE.21.031469

Database:Compendex

Accession number:20133016522178

Title:Higher quantum efficiency GaAs photocathode material with exponential-doping structure

Authors:Chen, Huailin (1); Yang, Wenzheng (2); Tang, Weidong (2); Fu, Xiaoqian (1); Du, Yujie (1); Zhang, Junju (1)

Author affiliation:(1) School of Electronic Engineering and Optoelectronic Technology, Nanjing University of Science and Technology, Nanjing, 210094, China; (2) Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an, 710119, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8761

Monograph title:PIAGENG 2013: Image Processing and Photonics for Agricultural Engineering

Issue date:2013

Publication year:2013

Article number:87610W

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819495587

Document type:Conference article (CA)

Conference name:3rd International Conference on Photonics and Image in Agriculture Engineering, PIAGENG 2013

Conference date:January 27, 2013 - January 28, 2013

Conference location:Sanya, China

Conference code:97677

Sponsor:Wuhan University of Technology; Information Engineering Research Institute

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:To improve the performance of GaAs NEA photocathodes, an exponential-doping structure GaAs material has been put forward, in which from the GaAs bulk-to-surface doping concentration is distributed exponentially from high to low. We apply this exponential-doping GaAs structure to the transmission-mode GaAs photocathodes. This sample was grown on the high quality p-type Be-doped GaAs (100) substrate by MBE. We have calculated the band-bending energy in exponential-doping GaAs emission-layer, and the total band-bending energy is 59 meV which helps to improve the photoexcited electrons movement towards surface for the thin epilayer. The integrated sensitivity of the exponential-doping GaAs photocathode samples reaches 1547uA/lm. © 2013 SPIE.

Number of references:7

Main heading:Gallium arsenide

Controlled terms:Field emission cathodes - Image processing - Photocathodes - Photonics - Semiconducting gallium

Uncontrolled terms:Doping concentration - GaAs photocathodes - GaAs(1 0 0) - High quality - NEA photocathode - Negative electron affinity - Photoexcited electrons - Transmission mode

Classification code:804 Chemical Products Generally - 744 Lasers - 741 Light, Optics and Optical Devices - 717 Optical Communication - 714.1 Electron Tubes - 712.1.1 Single Element Semiconducting Materials - 712 Electronic and Thermionic Materials

DOI:10.1117/12.2020136

Database:Compendex

Accession number:20132616448354

Title:Misalignment induced aberration characteristic of TMA optical system

Authors:Pang, Zhihai (1); Fan, Xuewu (1); Chen, Qinfang (1); Ma, Zhen (1)

Author affiliation:(1) Space Optics Laboratory, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Pang, Z.(uestc_pzh@126.com)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:42

Issue:3

Issue date:March 2013

Publication year:2013

Pages:653-657

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:Based on the vector wavefront aberration theory, the misalignment induced aberration's characteristic of TMA optical system was analyses in this paper. It is shown that a misaligned TMA has three residual 3rd aberrations. The 3rd order spherical aberration that is constant over the field and the 3rd order coma is a constant in magnitude and orientation over the field. Moreover, the 3rd order astigmatism is field-asymmetric in orientation and increases linearly with the field, and the location zero for the field-asymmetric, field linear astigmatism always reside at the center of the field of view. It has been demonstrated that a TMA under assembly is only measured to have perfect performance on-axis which is not aligned in any significant way, so the measurements of multiple field points for the TMA are required in the process of alignment. Under condition of remove axial coma, if astigmatism is measured on-axis, which is caused by the primary mirror astigmatic figure error but not the misalignment.

Number of references:13

Main heading:Optical systems

Controlled terms:Aberrations - Alignment - Mirrors

Uncontrolled terms:Field of views - Measurements of - Misalignment - Optical assemblies - Primary mirrors - Spherical aberrations - Three-mirror anastigmatic - Wavefront aberrations

Classification code:601.1 Mechanical Devices - 741 Light, Optics and Optical Devices - 741.3 Optical Devices and Systems

Database:Compendex

Accession number:20140317209496

Title:Image definition evaluation algorithm based on color relativity

Authors:Guo, Huinan (1); Cao, Jianzhong (1); Zhou, Zuofeng (1); Tang, Linao (1); Wang, Hua (1); Ma, Nan (2)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) People's Liberation Army of No. 95879, Chengdu 610081, China

Corresponding author:Guo, H.(s09068@opt.cn)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:42

Issue:11

Issue date:November 2013

Publication year:2013

Pages:3132-3136

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:Definition evaluation function of digital image plays an important role in digital camera auto-focus. Due to the existing definition evaluation functions are of some marked disadvantages, a spatial domain evaluation algorithm for digital color image was proposed. The colorful property of each pixel was judged and definition chromatic difference parameters was created by using chromatic difference between their tri-stimulus values. Besides, nonlinear function was used to improve the gradient coefficient of each pixel which made the evaluation function be more sensitive to some images in extreme cases. Experimental results show the superiority of our algorithm over the most of existing evaluation algorithms in dealing with natural images. And our method also is of a good ability of robustness as well as reducing calculation complexity and it can be easily achieved on hardware.

Number of references:8

Main heading:Function evaluation

Controlled terms:Algorithms - Gradient methods - Pixels - Relativity

Uncontrolled terms:Auto focus - Difference parameters - Digital color images - Evaluation algorithm - Evaluation function - Image definition - Nonlinear functions - Spatial domains

Classification code:723 Computer Software, Data Handling and Applications - 723.5 Computer Applications - 921 Mathematics - 921.6 Numerical Methods - 931.5 Gravitation, Relativity and String Theory

Database:Compendex

Accession number:20134817030991

Title:Calculation method of earth-atmosphere stray light illuminance on low-orbit space cameras

Authors:Du, Yujun (1); He, Yinghong (2); Chen, Haibin (1); Xin, Weijuan (1); Xue, Bing (2)

Author affiliation:(1) School of Optoelectronics Engineering, Xi'an Technological University, Xi'an, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an, China

Source title:Journal of Multimedia

Abbreviated source title:J. Multimedia

Volume:8

Issue:6

Issue date:2013

Publication year:2013

Pages:699-704

Language:English

ISSN:17962048

Document type:Journal article (JA)

Publisher:Academy Publisher, P.O.Box 40,, OULU, 90571, Finland

Abstract:The earth-atmosphere stray light can lower contrast ratio and SNR of spatial optical remote sensors, or even fail the system at certain conditions. Errors in the calculation of the stray light illuminance based on point source are very large, for the satellite's altitude is only several hundred kilometers and far less than the radius of the earth. This paper proposed a stray light illuminance calculating method which viewed the earth as a plane stray source and introduced the method in detail. Using the calculating method, earth-atmosphere stray light illuminance on the camera image plane for a low-orbit space camera at a typical position is calculated, and the results were compared with those calculated by viewing the earth as a point source, which evidently show that, when considering the earth-atmosphere stray light's effects on low-orbit space cameras, it's necessary to treat the earth as a plane extended light source. © 2013 Academy Publisher.

Number of references:15

Main heading:Earth atmosphere

Controlled terms:Cameras - Light sources - Orbits - Stray light

Uncontrolled terms:Calculating methods - Camera images - Contrast ratio - Light illuminance - Optical remote sensors - Point source transmission - Point sources - Space cameras

Classification code:443.1 Atmospheric Properties - 655.2 Satellites - 741.1 Light/Optics - 742.2 Photographic Equipment

DOI:10.4304/jmm.8.6.699-704

Database:Compendex

Accession number:20134817032699

Title:The applications of laser tracking and ranging technology in space rendezvous and docking

Authors:She, Wenji (1); Gao, Limin (1); Zhou, Liang (2); Li, Dawei (1); Wang, Rong (3)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics of CAS, Shaanxi 710119, China; (2) University of Chinese, Academy of Sciences, Shaanxi 710119, China; (3) Xi'An University of Architecture and Technology, Shaanxi 710119, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8905

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Laser Sensing and Imaging and Applications

Issue date:2013

Publication year:2013

Article number:89050S

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497741

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE); The Optical Society; European Optical Society; Chinese Society of Astronautics

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:With the development of space technology, more and more Rendezvous and Docking (RVD) mission require more precise measurement of relative position and attitude between tracking spacecraft and target spacecraft. In the procedure of docking between near spacecraft, the optical retroreflector on the target Spacecraft were tracked by the laser tracking and ranging device on the tracking spacecraft, the distance data were provided by laser ranging system, and the azimuth data were provided by tracking gimbal, Synthesized the distance data and azimuth data, the relative position information between two spacecraft were provided to the target spacecraft. Furthermore, through tracking more than three point on the target spacecraft,the complete information of relative position and attitude between two spacecraft were calculated rapidly by the measurement system, which were presented to the control system during the whole RVD operating stage. The laser tracking technology guaranteed continuous measurement and supplied accurate azimuth information, and the laser ranging technology ensured high accuracy of distance information. In addition, the untouched measure mode give no disturbance to the docking operation, moreover, the monochromaticity of laser make the tracking and ranging procedure avoiding to be disturbed by parasitic light of space, thus there will be a effective measurement accompanying the whole docking operating procedure and affording valid data to the control system of docking. © 2013 SPIE.

Number of references:5

Main heading:Spacecraft

Controlled terms:Control systems - Docking - Laser applications - Manned space flight - Target tracking

Uncontrolled terms:Complete information - Continuous measurements - Distance information - Laser ranging systems - Laser tracking - Precise measurements - Relative position and attitude - Rendezvous and docking

Classification code:655.1 Spacecraft, General - 656.1 Space Flight - 731.1 Control Systems - 744.9 Laser Applications

DOI:10.1117/12.2033065

Database:Compendex

Accession number:20134817027115

Title:Investigation and control of ultrafast laser-induced isotropic and anisotropic nanoscale-modulated index patterns in bulk fused silica

Authors:Stoian, R. (1); Mishchik, K. (1); Cheng, G. (2); Mauclair, C. (1); D'Amico, C. (1); Colombier, J.P. (1); Zamfirescu, M. (3)

Author affiliation:(1) Laboratoire Hubert Curien, UMR 5516 CNRS, Université de Lyon, Université Jean Monnet, 42000 Saint Etienne, France; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, 710119 Xi'an, Shaanxi, China; (3) National Institute for Laser, Plasma and Radiation Physics, 077125 Magurele, Bucharest, Romania

Corresponding author:Stoian, R.(razvan.stoian@univ-st-etienne.fr)

Source title:Optical Materials Express

Abbreviated source title:Opt. Mater. Express

Volume:3

Issue:10

Issue date:2013

Publication year:2013

Pages:1755-1768

Language:English

E-ISSN:21593930

Document type:Journal article (JA)

Publisher:Optical Society of America, 2010 Massachusetts Ave, NW, Washington, DC, DC 20036-1023, United States

Abstract:Ultrafast laser-induced refractive index changes in a-SiO<inf>2</inf> consist, depending on the irradiation conditions, of either positive variations, voids, or regular nanoscale patterns, each of these underlying specific structural transformations. These allow for obtaining a large palette of optical functions ranging from low loss guiding to anisotropic scattering. While briefly reviewing the excitation mechanisms, we spectroscopically interrogate local electronic and structural transformations of the glass in the isotropic index zones and in the regular self-organized nanostructures, indicating bond breaking and matrix oxygen deficiency. A spatial defect segregation marks the material transformation in the different photoinscription regimes. We equally propose a method of real time control of nanogratings formation under the action of ultrashort laser pulse with variable envelopes. Application as polarizing optical devices is discussed. © 2013 Optical Society of America.

Number of references:43

Main heading:Linear transformations

Controlled terms:Nanotechnology - Real time control - Ultrafast lasers - Ultrashort pulses

Uncontrolled terms:Anisotropic scattering - Excitation mechanisms - Irradiation conditions - Material transformation - Nano-scale patterns - Refractive index changes - Self-organized nanostructures - Structural transformation

Classification code:731 Automatic Control Principles and Applications - 732 Control Devices - 744.1 Lasers, General - 761 Nanotechnology - 921.3 Mathematical Transformations

DOI:10.1364/OME.3.001755

Database:Compendex

Accession number:20130415941264

Title:A new method of processing high-precision micro-hole with the femtosecond laser

Authors:Yang, Xiaojun (1); Li, Ming (1); Wang, Li (2); Zhao, Hualong (1); Cheng, Guagnhua (1)

Author affiliation:(1) State Key Laboratory Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) Shenyang Liming Aero-engine Group Corporation Ltd., AVIC, Shenyang 110043, China

Corresponding author:Yang, X.(laser_ceo@opt.cn)

Source title:Applied Mechanics and Materials

Abbreviated source title:Appl. Mech. Mater.

Volume:268

Issue:PART 1

Monograph title:Materials, Mechanical Engineering and Manufacture

Issue date:2013

Publication year:2013

Pages:382-386

Language:English

ISSN:16609336

E-ISSN:16627482

ISBN-13:9783037855799

Document type:Conference article (CA)

Conference name:2nd International Conference on Applied Mechanics, Materials and Manufacturing, ICAMMM 2012

Conference date:November 17, 2012 - November 18, 2012

Conference location:Changsha, China

Conference code:95054

Publisher:Trans Tech Publications, P.O. Box 1254, Clausthal-Zellerfeld, D-38670, Germany

Abstract:Based on the femtosecond laser processing technology and PZT driving scanning technology, high-precision micro- manufacturing technology is developed. By adjusting the laser parameters and scanning parameters to get micro-hole machining on the flat or curved surface. Hole's size and surface morphology is observed by using phase contrast microscopy and scanning electron microscopy observations, and the surface roughness is analyzed by the surface profile instrument. The feasibility of diesel injector nozzle processing is verified in practical industry applications. The results show that this method of making micro hole has significant advantages, such as high precision, good consistency, without burrs, good surface roughness and high efficiency. These characteristics can meet the practical application requirements and can be used in various industrial fields. © (2013) Trans Tech Publications, Switzerland.

Number of references:11

Main heading:Lasers

Controlled terms:Industrial applications - Machining - Manufacture - Piezoelectric ceramics - Scanning electron microscopy - Semiconducting lead compounds - Surface roughness - Ultrashort pulses

Uncontrolled terms:Application requirements - Curved surfaces - Diesel injector nozzles - Femtosecond laser processing - High-precision - Industrial fields - Industry applications - Laser parameters - Laser scanning - Lead zirconate titanate - Manufacturing technologies - Method of processing - Micro holes - Phase-contrast microscopy - PZT - Scanning parameters - Surface profiles

Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 913.4 Manufacturing - 913 Production Planning and Control; Manufacturing - 812.1 Ceramics - 744.1 Lasers, General - 712.1.2 Compound Semiconducting Materials - 604.2 Machining Operations

DOI:10.4028/www.scientific.net/AMM.268-270.382

Database:Compendex

Accession number:20133016543308

Title:Design of long-wave infrared scan system with rotating dual-wedge prism

Authors:Fan, Zheyuan (1); Gao, Limin (1); Yang, Hongtao (1); Chen, Weining (1); Cao, Jianzhong (1); Zhang, Jian (1); Zhang, Zhi (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an 710119, China; (2) Graduate University of the Chinese Academy of Sciences, Beijing 100039, China

Source title:Key Engineering Materials

Abbreviated source title:Key Eng Mat

Volume:552

Monograph title:Advances in Optics Manufacture

Issue date:2013

Publication year:2013

Pages:27-32

Language:English

ISSN:10139826

CODEN:KEMAEY

ISBN-13:9783037856918

Document type:Conference article (CA)

Conference name:Asia Pacific Conference on Optics Manufacture 2012, APCOM 2012

Conference date:August 26, 2012 - August 28, 2012

Conference location:Changchun, China

Conference code:97919

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:Due to the possession of advantages of passivity working mode, good disguise, and easy observation, infrared systems are used in a wide variety of applications. This paper using 640×480 uncooled detector designed a long-wave scan optical system with large field and large aperture working at 8.0μm&sim;12μm, the Pixel Dimensions of the detector is 30μm. The F number of this system is 1.4 and focal length is 17mm, FOV is 63.6°, which extended to 143° by adopting dual-wedge prism rotating, the paper also given the extended field theory by the dual-wedge prism. Because there are a limited number of lens materials used in LWIR spectral bands, Germanium material and three aspheric surfaces were adopted to balance sphere aberrations and chromatic aberration. All above mentioned are intending to ensure the system has good imaging quality. The results show that the optical performance approximates to the diffraction limit and the design has better achromatic performance. The modulation transfer function (MTF) is above 0.5 at spatial frequency of 20lp/mm, energy concentration ratio is greater than 70% within the sensing element of the detector and Root Mean Square (RMS) value of spot diameter is smaller than the Pixel Dimensions. The system has advantages of simple structure, large aperture, high image quality etc. © (2013) Trans Tech Publications, Switzerland.

Number of references:7

Main heading:Aberrations

Controlled terms:Detectors - Diffraction - Image quality - Infrared devices - Manufacture - Optical systems - Optical transfer function - Pixels - Prisms

Uncontrolled terms:Chromatic aberration - Diffraction limits - Energy concentration - High image quality - LWIR - MTF - Optical performance - Root mean square values

Classification code:537.1 Heat Treatment Processes - 723.5 Computer Applications - 741 Light, Optics and Optical Devices - 914 Safety Engineering

DOI:10.4028/www.scientific.net/KEM.552.27

Database:Compendex

Accession number:20134917058249

Title:Analytical model of amplitude-weighted array technology in forming symmetrical radiation patterns

Authors:Zhong, Lanxiang (1); Zhang, Zhiyong (1); Li, Jianlang (2)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710068, China; (2) Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China

Corresponding author:Li, J.(apuli@siom.ac.cn)

Source title:Chinese Optics Letters

Abbreviated source title:Chin. Opt. Lett.

Volume:11

Issue:8

Issue date:August 2013

Publication year:2013

Article number:080102

Language:English

ISSN:16717694

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:A method on amplitude-weighted array technology is proposed based on an analytical formula in which the radiation amplitudes of array elements are evaluated analytically by a random symmetrical far-field radiation pattern. Using this formula, any desired spatial radiation pattern in the far field could be built by applying the analytical solutions of radiation amplitudes of array elements. To check the validity of this formula as well as the proposed technique, an annular intensity distribution as target far-field pattern is designed, and the respective radiation amplitude of array elements are determined by solving the formula analytically. The available far-field pattern is calculated by applying these solutions and then compared with the target far-field pattern. The theoretical results show the capabilities of the analytical derivation as well as the proposed technique in forming specific radiation patterns. © 2013 Chinese Optics Letters.

Number of references:15

Main heading:Physics

Controlled terms:Optics

Uncontrolled terms:Analytical formulas - Array elements - Far field - Far field radiation patterns - Far-field patterns - Intensity distribution - Radiation amplitude - Spatial radiation

Classification code:741.1 Light/Optics - 931 Classical Physics; Quantum Theory; Relativity - 932 High Energy Physics; Nuclear Physics; Plasma Physics - 933 Solid State Physics

DOI:10.3788/COL201311.080102

Database:Compendex

Accession number:20124715687932

Title:Heterogeneous image transformation

Authors:Wang, Nannan (1); Li, Jie (1); Tao, Dacheng (2); Li, Xuelong (3); Gao, Xinbo (1)

Author affiliation:(1) School of Electronic Engineering, Xidian University, Xi'an 710071, China; (2) Faculty of Engineering and Information Technology, University of Technology, Sydney 2007, Australia; (3) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Gao, X.(xbgao.vipsl@gmail.com)

Source title:Pattern Recognition Letters

Abbreviated source title:Pattern Recogn. Lett.

Volume:34

Issue:1

Issue date:January 1, 2013

Publication year:2013

Pages:77-84

Language:English

ISSN:01678655

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:Heterogeneous image transformation (HIT) plays an important role in both law enforcements and digital entertainment. Some available popular transformation methods, like locally linear embedding based, usually generate images with lower definition and blurred details mainly due to two defects: (1) these approaches use a fixed number of nearest neighbors (NN) to model the transformation process, i.e.; K-NN-based methods; (2) with overlapping areas averaged, the transformed image is approximately equivalent to be filtered by a low pass filter, which filters the high frequency or detail information. These drawbacks reduce the visual quality and the recognition rate across heterogeneous images. In order to overcome these two disadvantages, a two step framework is constructed based on sparse feature selection (SFS) and support vector regression (SVR). In the proposed model, SFS selects nearest neighbors adaptively based on sparse representation to implement an initial transformation, and subsequently the SVR model is applied to estimate the lost high frequency information or detail information. Finally, by linear superimposing these two parts, the ultimate transformed image is obtained. Extensive experiments on both sketch-photo database and near infrared-visible image database illustrates the effectiveness of the proposed heterogeneous image transformation method. © 2012 Elsevier B.V. All rights reserved.

Number of references:32

Main heading:Mathematical transformations

Controlled terms:Infrared devices - Infrared imaging - Linear transformations

Uncontrolled terms:Digital entertainment - Fixed numbers - High frequency - Image database - Image transformations - Locally linear embedding - Near Infrared - Nearest neighbors - Overlapping area - Recognition rates - Sparse representation - Support vector regression (SVR) - Transformation methods - Transformation process - Visual qualities

Classification code:741.3 Optical Devices and Systems - 921.3 Mathematical Transformations

DOI:10.1016/j.patrec.2012.04.005

Database:Compendex

Accession number:20131116114414

Title:Error characteristics in mutual conversion process of reflective fiber optic current transducer's optical polarization state

Authors:Wang, Lihui (1); He, Zhou (3); Liu, Xixiang (1); Yan, Jie (1); Li, Peijuan (1)

Author affiliation:(1) Southeast University, Nanjing 210096, China; (2) Xian Institute of Optics and Precision Mechanics, Xi'an 710119, China; (3) Henan Pinggao Electric Co. Ltd., Pingdingshan 467001, China

Corresponding author:Wang, L.

Source title:Diangong Jishu Xuebao/Transactions of China Electrotechnical Society

Abbreviated source title:Diangong Jishu Xuebao

Volume:28

Issue:1

Issue date:January 2013

Publication year:2013

Pages:173-178

Language:Chinese

ISSN:10006753

CODEN:DIJXE5

Document type:Journal article (JA)

Publisher:Chinese Machine Press, 1 Nanjie Baiwanzhuang, Beijig, 100037, China

Abstract:Reflective fiber optic current transducer(R-FOCT) is a kind of precision instrument based on optical polarization and optical interference theory. The key optical components in R-FOCT show error characteristics in conversion between linear polarization state and circular polarization state, including quarter-wave retarder, sensing head and mirror, which induces linearly polarized light wave in polarization maintaining fiber and circularly polarized light wave in sensing fiber to be elliptically polarized light wave. Then nonreciprocal phase shift induced by magnetic field of the current is interrupted by wrong polarization state. Focused on polarization error characteristics during mutual conversion process in fiber optic current transducer, optical polarization error models are built by using Jones matrix and Poincare sphere respectively, investigated the influence of several key error factors on measurement accuracy and linearity of scale factor, including phase delay in quarter-wave retarder, birefringence in sensing head and mirror reflection phase shift error. Finally, the proposed methods are verified by simulation test, and scale factor error characteristics of R-FOCT related with optical polarization errors were quantified. The results verify the feasibility of the proposed research scheme.

Number of references:14

Main heading:Light polarization

Controlled terms:Circular polarization - Fiber optics - Mirrors - Models - Phase shift - Phase shifters - Photonics - Polarization - Polarization-maintaining fiber - Transducers

Uncontrolled terms:Circular polarization state - Circularly polarized light - Conversion process - Current transducer - Elliptically polarized light - Error characteristics - Error factors - Jones matrix - Linear polarization - Linearity errors - Linearly polarized light - Measurement accuracy - Mirror reflections - Nonreciprocal phase shift - Optical components - Phase delay - Poincare sphere - Polarization errors - Polarization state - Precision instrument - Quarter waves - Scale Factor - Scale factor errors - Sensing fibers - Simulation tests

Classification code:703.1 Electric Networks - 704 Electric Components and Equipment - 715 Electronic Equipment, General Purpose and Industrial - 741 Light, Optics and Optical Devices - 902.1 Engineering Graphics - 942.2 Electric Variables Measurements

Database:Compendex

Accession number:20132116361723

Title:Hessian regularized support vector machines for mobile image annotation on the cloud

Authors:Tao, Dapeng (1); Jin, Lianwen (1); Liu, Weifeng (2); Li, Xuelong (3)

Author affiliation:(1) School of Electronic and Information Engineering, South China University of Technology, GuangZhou 510640, Guangdong, China; (2) College of Information and Control Engineering, China University of Petroleum, China; (3) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China

Source title:IEEE Transactions on Multimedia

Abbreviated source title:IEEE Trans Multimedia

Volume:15

Issue:4

Issue date:2013

Publication year:2013

Pages:833-844

Article number:6409462

Language:English

ISSN:15209210

CODEN:ITMUF8

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., 445 Hoes Lane / P.O. Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:With the rapid development of the cloud computing and mobile service, users expect a better experience through multimedia computing, such as automatic or semi-automatic personal image and video organization and intelligent user interface. These functions heavily depend on the success of image understanding, and thus large-scale image annotation has received intensive attention in recent years. The collaboration between mobile and cloud opens a new avenue for image annotation, because the heavy computation can be transferred to the cloud for immediately responding user actions. In this paper, we present a scheme for image annotation on the cloud, which transmits mobile images compressed by Hamming compressed sensing to the cloud and conducts semantic annotation through a novel Hessian regularized support vector machine on the cloud. We carefully explained the rationality of Hessian regularization for encoding the local geometry of the compact support of the marginal distribution and proved that Hessian regularized support vector machine in the reproducing kernel Hilbert space is equivalent to conduct Hessian regularized support vector machine in the space spanned by the principal components of the kernel principal component analysis. We conducted experiments on the PASCAL VOC'07 dataset and demonstrated the effectiveness of Hessian regularized support vector machine for large-scale image annotation. © 1999-2012 IEEE.

Number of references:10

Main heading:Support vector machines

Controlled terms:Cloud computing - Image analysis - Image retrieval - Principal component analysis - Semantics

Uncontrolled terms:Intelligent User Interfaces - Kernel principal component analyses (KPCA) - Manifold regularizations - Marginal distribution - Mobile service - Principal Components - Reproducing Kernel Hilbert spaces - Semantic annotations

Classification code:722.4 Digital Computers and Systems - 723 Computer Software, Data Handling and Applications - 741 Light, Optics and Optical Devices - 903.2 Information Dissemination - 922.2 Mathematical Statistics

DOI:10.1109/TMM.2013.2238909

Database:Compendex

Accession number:20132816484009

Title:Shape recovery from images acquired by a wedge-ring poor-pixels detector

Authors:Wen, Pengcheng (1); Zhang, Yadi (1); Wang, Xiangjun (2); Wei, Hong (3)

Author affiliation:(1) AVIC Computing Technique Research Institute, Xi'an 710119, China; (2) College of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China; (3) School of Systems Engineering, University of Reading, Reading RG6 6AY, United Kingdom

Corresponding author:Wen, P.(victorlionwen@hotmail.com)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:42

Issue:5

Issue date:May 2013

Publication year:2013

Pages:1366-1371

Language:English

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:A novel wedge-ring poor-pixels photoel ectric detector is valuable for a micro vision system. However an image acquired by the detector has extremely low resolution and it does not reflect the same or similar shape information of an object in the real world. To enable such a detector and its images available in further object identification, a unique shape recovery framework was presented in this paper. By rotating the wedge-ring detector around its center in a sub-wedge range, original low-resolution images were generated. Then linear interpolation along with a least squares method was applied to preliminarily recover the object shape. After noise removal via a two-stage level set evolution with an edge indicator function, the final high-quality object shape was achieved. Experiments demonstrate the effective performance of the proposed algorithms, in which the shape recovery rate is up to 95%.

Number of references:13

Main heading:Detectors

Controlled terms:Computer vision - Least squares approximations - Numerical control systems - Pixels - Shape optimization

Uncontrolled terms:Effective performance - Least squares methods - Level-set evolution - Linear Interpolation - Low resolution images - Object identification - Shape recovery - Wedge-ring image

Classification code:723.5 Computer Applications - 731.1 Control Systems - 731.6 Robot Applications - 914 Safety Engineering - 921.5 Optimization Techniques - 921.6 Numerical Methods

Database:Compendex

Accession number:20131616211228

Title:3 W high-power laser passively mode-locked by graphene oxide saturable absorber

Authors:Feng, Chao (1); Wang, Yonggang (2); Liu, Jie (1); Tsang, Yuen H. (2); Song, Yanrong (4); Yu, Zhenhua (4)

Author affiliation:(1) College of Physics and Electronics, Shandong Normal University, Jinan, Shandong 250014, China; (2) Department of Applied Physics, Hong Kong Polytechnic University, Hong Kong, Hong Kong; (3) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (4) Institute of Information Photonics Technology, College of Applied Sciences, Beijing University of Technology, Beijing, China

Corresponding author:Liu, J.(jieliu@sdnu.edu.cn)

Source title:Optics Communications

Abbreviated source title:Opt Commun

Volume:298-299

Issue date:July 1, 2013

Publication year:2013

Pages:168-170

Language:English

ISSN:00304018

CODEN:OPCOB8

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:A novel reflective graphene oxide based saturable absorber is fabricated and used to passively mode locked the Nd:YVO<inf>4</inf> ultrafast laser system. The maximum average output power measured is 3.06 W and the optical to optical conversion efficiency is about 25%. The measured pulse duration and repetition rate are 8.8 ps and 84 MHz. The maximum peak power and the single pulse energy of the mode-locking laser are up to 4.1 kW and 36 nJ, respectively. To the best of our knowledge, it is the highest average output power for the lasers mode locked with graphene based absorbers. © 2013 Elsevier B.V. All rights reserved.

Number of references:21

Main heading:Passive mode locking

Controlled terms:Graphene - Laser mode locking - Mode-locked fiber lasers - Q switched lasers - Saturable absorbers - Ultrafast lasers

Uncontrolled terms:Absorber - Average output power - Graphene oxides - Optical-to-optical conversion efficiencies - Passively mode-locked - Pulse durations - Single pulse energy - Ultrafast laser systems

Classification code:744.1 Lasers, General - 761 Nanotechnology - 804 Chemical Products Generally

DOI:10.1016/j.optcom.2013.02.003

Database:Compendex

Accession number:20134216859892

Title:Electromagnetic resonance tunneling in a single-negative sandwich structure

Authors:Kang, Yongqiang (1); Zhang, Chunmin (1); Gao, Peng (1); Ren, Wenyi (1)

Author affiliation:(1) School of Science, Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xian Jiaotong University, Xian 710049, China; (2) Xian Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xian 710048, China; (3) Institute of Solid State Physics, Shanxi Datong University, Datong, Shanxi 037009, China

Corresponding author:Zhang, C.(zcm@mail.xjtu.edu.cn)

Source title:Journal of Modern Optics

Abbreviated source title:J. Mod. Opt.

Volume:60

Issue:13

Issue date:July 1, 2013

Publication year:2013

Pages:1021-1026

Language:English

ISSN:09500340

E-ISSN:13623044

CODEN:JMOPEW

Document type:Journal article (JA)

Publisher:Taylor and Francis Ltd., 4 Park Square, Milton Park, Abingdon, Oxfordshire, OX14 4RN, United Kingdom

Abstract:The electromagnetic wave tunneling phenomenon in a sandwich structure consisting of epsilon-negative (ENG), mu-negative (MNG), and epsilon-negative (ENG) media was investigated. Merging of resonance tunneling modes is demonstrated when the conjugate matched trilayer condition is satisfied. The resonance frequency is found to be independent of the thickness ratio of the matched trilayer structure. The resonance tunneling possesses particular angular-dependent and polarization-free properties. The electric fields corresponding to the frequencies of the resonance modes are found to be strongly localized at just one interface with low transmittance. The possible influence on resonance tunneling due to the losses from the single-negative materials is also investigated. © 2013 Taylor and Francis.

Number of references:17

Main heading:Resonance

Controlled terms:Electric fields - Metamaterials - Sandwich structures

Uncontrolled terms:Electromagnetic optics - Electromagnetic resonance - Electromagnetic-wave tunneling - Epsilon negatives - Resonance frequencies - Resonance tunneling - Single-negative materials - Trilayer structure

Classification code:415 Metals, Plastics, Wood and Other Structural Materials - 701 Electricity and Magnetism - 701.1 Electricity: Basic Concepts and Phenomena - 951 Materials Science

DOI:10.1080/09500340.2013.827251

Database:Compendex

Accession number:20132216376028

Title:Speckle noise suppression of reconstructed image based on dual-tree complex wavelet and anisotropic diffusion

Authors:Wu, Yiquan (1); Ye, Zhilong (1); Wan, Hong (1)

Author affiliation:(1) College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu 210016, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an, Shaanxi 710068, China

Corresponding author:Wu, Y.(nuaaimage@yahoo.com.cn)

Source title:Zhongguo Jiguang/Chinese Journal of Lasers

Abbreviated source title:Zhongguo Jiguang

Volume:40

Issue:4

Issue date:April 2013

Publication year:2013

Article number:0409002

Language:Chinese

ISSN:02587025

CODEN:ZHJIDO

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:In order to suppress the speckle noise of reconstructed image in digital holography effectively and to further improve the quality of reconstructed image, a speckle noise suppression method of reconstructed image in digital holography based on dual-tree complex wavelet transform (DT-CWT) and anisotropic diffusion is proposed. The reconstructed image is decomposed through DT-CWT. Then, the low-frequency components and the high-frequency components in six directions are processed through P_Laplace diffusion and Laplacian pyramid-based nonlinear diffusion (LPND), respectively. The new reconstructed image is synthesized through inverse dual-tree complex wavelet transform (IDT-CWT). The experimental results are given, and a subjective visual comparison is made with the method of wavelet threshold shrinkage and total variation (TV) diffusion, the method of LPND, and the method combining contourlet transform with TV and adaptive contrast diffusion. While the results are evaluated quantitatively according to peak signal to noise ratio (PSNR), correlation coefficient (COR) and running time. Experimental results show that the proposed method has a better performance in speckle noise suppression and preserves the detail and textural features of original reconstructed image more efficiently.

Number of references:24

Main heading:Image reconstruction

Controlled terms:Computer generated holography - Diffusion - Holography - Laplace transforms - Optical anisotropy - Partial discharges - Speckle - Spurious signal noise

Uncontrolled terms:Dual-tree complex wavelet transform - Dual-tree complex wavelets - High frequency components - Nonlinear diffusion - Peak signal to noise ratio - Quality of reconstructed images - Reconstructed image - Speckle noise

Classification code:921.3 Mathematical Transformations - 746 Imaging Techniques - 743.1 Holographic Techniques - 931.1 Mechanics - 743 Holography - 741 Light, Optics and Optical Devices - 701.1 Electricity: Basic Concepts and Phenomena - 741.1 Light/Optics

DOI:10.3788/CJL201340.0409002

Database:Compendex

Accession number:20135117095004

Title:Learning saliency by MRF and differential threshold

Authors:Zhu, Guokang (1); Wang, Qi (1); Yuan, Yuan (1); Yan, Pingkun (1)

Author affiliation:(1) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Xi'an 710119, China

Source title:IEEE Transactions on Cybernetics

Abbreviated source title:IEEE Trans. Cybern.

Volume:43

Issue:6

Issue date:December 2013

Publication year:2013

Pages:2032-2043

Article number:6468084

Language:English

ISSN:21682267

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., 445 Hoes Lane / P.O. Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:Saliency detection has been an attractive topic in recent years. The reliable detection of saliency can help a lot of useful processing without prior knowledge about the scene, such as content-aware image compression, segmentation, etc. Although many efforts have been spent in this subject, the feature expression and model construction are far from perfect. The obtained saliency maps are therefore not satisfying enough. In order to overcome these challenges, this paper presents a new psychologic visual feature based on differential threshold and applies it in a supervised Markov-random-field framework. Experiments on two public data sets and an image retargeting application demonstrate the effectiveness, robustness, and practicability of the proposed method. © 2013 IEEE.

Number of references:55

Main heading:Image segmentation

Controlled terms:Computer vision - Learning systems - Markov processes

Uncontrolled terms:Differential threshold - Feature expression - Image retargeting - Markov Random Fields - Model construction - Reliable detection - Saliency detection - Visual Attention

Classification code:723.5 Computer Applications - 731.5 Robotics - 741.1 Light/Optics - 922.1 Probability Theory

DOI:10.1109/TSMCB.2013.2238927

Database:Compendex

Accession number:20132916517334

Title:Research of X-ray pulsar navigation simulation source

Authors:Sheng, Li-Zhi (1); Zhao, Bao-Sheng (1); Wu, Jian-Jun (3); Zhou, Feng (1); Song, Juan (1); Liu, Yong-An (1); Shen, Jing-Shi (4); Yan, Qiu-Rong (1); Deng, Ning-Qin (1); Hu, Hui-Jun (4)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100039, China; (3) Wuxi Institute of Commerce, Wuxi 214153, China; (4) Shandong Aerospace Electro-Technology Institute, Yantai 264670, China

Corresponding author:Sheng, L.-Z.(Lizhi_sheng@opt.ac.cn)

Source title:Wuli Xuebao/Acta Physica Sinica

Abbreviated source title:Wuli Xuebao

Volume:62

Issue:12

Issue date:June 20, 2013

Publication year:2013

Article number:129702

Language:Chinese

ISSN:10003290

CODEN:WLHPAR

Document type:Journal article (JA)

Publisher:Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing, 100190, China

Abstract:As an autonomous navigation method, X-ray pulsar navigation can provide position, timing and attitude information for various spacecrafts. Since the X-rays (1-20 keV) from the pulsar can not penetrate the earth atmosphere, an X-ray source in laboratory needs to be set up to test and calibrate the detector. In this paper an arbitrary X-ray pulse source to simulate the neutron pulsar signal is proposed. The main components of the simulation source are a grid controlled X-ray tube and arbitrary pulse generation electronics. With the arbitrary pulse voltage applied to the tube grid, the X-ray intensity is controlled. Through electron optics design, the tube electrode parameters are optimized. A grid controlled X-ray tube is fabricated and tested. Using a micro-channel plate detector to detect and reconstruct the generated X-ray pulses, the similarity between the accumulated profile and the original pulsar profile is better than 95%. The frequency stability of the pulsar source emulator is about 2×10-11. © 2013 Chinese Physical Society.

Number of references:12

Main heading:X rays

Controlled terms:Electromagnetic wave emission - Navigation - Pulse generators - Tubes (components) - X ray tubes

Uncontrolled terms:Arbitrary pulse - Autonomous navigation - Electrode parameters - Grid control - Micro channel plate - Neutron - pulsars - X ray intensity - X-ray pulsars

Classification code:422.1 Strength of Building Materials : Test Equipment - 616.1 Heat Exchange Equipment and Components - 711 Electromagnetic Waves - 713.4 Pulse Circuits - 716.3 Radio Systems and Equipment - 932.1 High Energy Physics

DOI:10.7498/aps.62.129702

Database:Compendex

Accession number:20135117093592

Title:Adaptive bad pixel correction algorithm for IRFPA based on PCNN

Authors:Leng, Hanbing (1); Zhou, Zuofeng (1); Cao, Jianzhong (1); Yi, Bo (1); Yan, Aqi (1); Zhang, Jian (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Leng, H.(lenghanbing@opt.ac.cn)

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8917

Monograph title:MIPPR 2013: Multispectral Image Acquisition, Processing, and Analysis

Issue date:2013

Publication year:2013

Article number:891705

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819498021

Document type:Conference article (CA)

Conference name:8th Symposium on Multispectral Image Processing and Pattern Recognition, MIPPR 2013

Conference date:October 26, 2013 - October 27, 2013

Conference location:Wuhan, China

Conference code:101243

Sponsor:National Key Laboratory of Science and Technology; on Multi-spectral Information Processing; Huazhong University of Science and Technology; The Society of Photo-Optical Instrumentation; Engineers (SPIE)

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:Bad pixels and response non-uniformity are the primary obstacles when IRFPA is used in different thermal imaging systems. The bad pixels of IRFPA include fixed bad pixels and random bad pixels. The former is caused by material or manufacture defect and their positions are always fixed, the latter is caused by temperature drift and their positions are always changing. Traditional radiometric calibration-based bad pixel detection and compensation algorithm is only valid to the fixed bad pixels. Scene-based bad pixel correction algorithm is the effective way to eliminate these two kinds of bad pixels. Currently, the most used scene-based bad pixel correction algorithm is based on adaptive median filter (AMF). In this algorithm, bad pixels are regarded as image noise and then be replaced by filtered value. However, missed correction and false correction often happens when AMF is used to handle complex infrared scenes. To solve this problem, a new adaptive bad pixel correction algorithm based on pulse coupled neural networks (PCNN) is proposed. Potential bad pixels are detected by PCNN in the first step, then image sequences are used periodically to confirm the real bad pixels and exclude the false one, finally bad pixels are replaced by the filtered result. With the real infrared images obtained from a camera, the experiment results show the effectiveness of the proposed algorithm. © 2013 SPIE.

Number of references:8

Main heading:Pixels

Controlled terms:Algorithms - Image processing - Infrared imaging - Median filters - Neural networks - Pattern recognition

Uncontrolled terms:Adaptive median filter - Adaptive Median Filter (AMF) - Bad pixels - Compensation algorithm - Correction algorithms - IRFPA - PCNN - Pulse coupled neural network

Classification code:716 Telecommunication; Radar, Radio and Television - 716.1 Information Theory and Signal Processing - 723 Computer Software, Data Handling and Applications - 741 Light, Optics and Optical Devices - 746 Imaging Techniques - 921 Mathematics

DOI:10.1117/12.2032065

Database:Compendex

Accession number:20130115862016

Title:Visual-textual joint relevance learning for tag-based social image search

Authors:Gao, Yue (1); Wang, Meng (2); Zha, Zheng-Jun (3); Shen, Jialie (4); Li, Xuelong (5); Wu, Xindong (6)

Author affiliation:(1) Department of Automation, Tsinghua University, Beijing 100084, China; (2) Computer Science and Information Engineering Department, Hefei University of Technology, Hefei 230009, China; (3) School of Computing, National University of Singapore, 117417 Singapore, Singapore; (4) School of Information Systems, Singapore Management University, 178902 Singapore, Singapore; (5) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Beijing 100864, China; (6) School of Computer Science and Information Engineering, Hefei University of Technology, Hefei 230009, China; (7) Department of Computer Science, University of Vermont, Burlington, VT 05405, United States

Corresponding author:Gao, Y.

Source title:IEEE Transactions on Image Processing

Abbreviated source title:IEEE Trans Image Process

Volume:22

Issue:1

Issue date:2013

Publication year:2013

Pages:363-376

Article number:6212356

Language:English

ISSN:10577149

CODEN:IIPRE4

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., 445 Hoes Lane / P.O. Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:Due to the popularity of social media websites, extensive research efforts have been dedicated to tag-based social image search. Both visual information and tags have been investigated in the research field. However, most existing methods use tags and visual characteristics either separately or sequentially in order to estimate the relevance of images. In this paper, we propose an approach that simultaneously utilizes both visual and textual information to estimate the relevance of user tagged images. The relevance estimation is determined with a hypergraph learning approach. In this method, a social image hypergraph is constructed, where vertices represent images and hyperedges represent visual or textual terms. Learning is achieved with use of a set of pseudo-positive images, where the weights of hyperedges are updated throughout the learning process. In this way, the impact of different tags and visual words can be automatically modulated. Comparative results of the experiments conducted on a dataset including 370+images are presented, which demonstrate the effectiveness of the proposed approach. © 1992-2012 IEEE.

Number of references:63

Main heading:Estimation

Controlled terms:Image processing - Mathematical models

Uncontrolled terms:Data sets - Hyperedges - Hypergraph - Image search - Learning approach - Learning process - Relevance learning - Research efforts - Research fields - Social media - tag - Tag-based - Textual information - Visual information - Visual word - visual-textual

Classification code:741 Light, Optics and Optical Devices - 921 Mathematics

DOI:10.1109/TIP.2012.2202676

Database:Compendex

Accession number:20130415941285

Title:A study of femtosecond laser machining technology applied in air-film holes on turbine blades

Authors:Zhao, Hualong (1); Zhu, Wenyu (1); Yang, Xiaojun (1); Gao, Shifang (2); Zhao, Hongyan (3)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) China KeHan Laser(Fujian) Co., Ltd, Putian 351111, China; (3) Xi'an International University, Xi'an 710077, China

Corresponding author:Zhao, H.(laser_pm@opt.cn)

Source title:Applied Mechanics and Materials

Abbreviated source title:Appl. Mech. Mater.

Volume:268

Issue:PART 1

Monograph title:Materials, Mechanical Engineering and Manufacture

Issue date:2013

Publication year:2013

Pages:487-491

Language:English

ISSN:16609336

E-ISSN:16627482

ISBN-13:9783037855799

Document type:Conference article (CA)

Conference name:2nd International Conference on Applied Mechanics, Materials and Manufacturing, ICAMMM 2012

Conference date:November 17, 2012 - November 18, 2012

Conference location:Changsha, China

Conference code:95054

Publisher:Trans Tech Publications, P.O. Box 1254, Clausthal-Zellerfeld, D-38670, Germany

Abstract:Femtosecond laser with the features of ultrashort pulse duration and ultrahigh peak power can achieve "cold" machining. The recast layer and micro-cracks of the hole wall can be reduced effectively by applying femtosecond laser in processing air-film holes on turbine blades, and the machining accuracy and consistency of the hole shape will increase. In this paper, the high-speed rotating femtosecond laser beam is adopted in several currently used turbine blade materials for air-film holes machining, and high quality air-film holes without hole wall recast layer and micro-cracks are processed through a large number of experiments to optimize machining technology and technological parameter. © (2013) Trans Tech Publications, Switzerland.

Number of references:8

Main heading:Lasers

Controlled terms:Cracks - Machining - Manufacture - Turbines - Turbomachine blades - Ultrashort pulses

Uncontrolled terms:Air-film hole - Femtosecond laser machining - High quality - Hole walls - Holes machining - Machining Accuracy - Machining technology - Peak power - Recast layer - Technological parameters - Turbine blade

Classification code:421 Strength of Building Materials; Mechanical Properties - 537.1 Heat Treatment Processes - 604.2 Machining Operations - 612.3 Gas Turbines and Engines - 618 Compressors and Pumps - 744.1 Lasers, General

DOI:10.4028/www.scientific.net/AMM.268-270.487

Database:Compendex

Accession number:20131416178329

Title:Low-distortion plasmonic slow-light system at telecommunication regime

Authors:Zeng, Chao (1); Cui, Yudong (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Zeng, C.(zengchao@opt.cn)

Source title:Optics Communications

Abbreviated source title:Opt Commun

Volume:294

Issue date:May 1, 2013

Publication year:2013

Pages:372-376

Language:English

ISSN:00304018

CODEN:OPCOB8

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:On the basis of an analog of electromagnetically induced transparency (EIT), a metal-insulator-metal (MIM) plasmonic waveguide that has the capacity of realizing slow light with low distortion is proposed and investigated numerically. The transmission line results show that a quite flat dispersion curve with nearly constant group index over a broad bandwidth of 29.64 nm can be achieved by appropriately altering the grating depths. It is found that the group velocity dispersion (GVD) parameter of the proposed structure can approach zero. By means of Finite-Difference Time-Domain (FDTD) simulations, we find that the incident pulse centered at telecommunication regime (i.e., 1550 nm) could be dramatically slowed down with only 2.1% distortion due to the low dispersion. The proposed plasmonic slow-light system may find potential applications for optical buffers and all-optical signal processors in future highly integrated circuits. © 2012 Elsevier B.V.

Number of references:52

Main heading:MIM devices

Controlled terms:Dispersions - Electromagnetic wave polarization - Finite difference time domain method - Group velocity dispersion - Optical waveguides - Plasmons - Quantum optics - Signal processing - Waveguides

Uncontrolled terms:Broad bandwidths - Electromagnetically induced transparency - Finite-difference time-domain simulation - Metal insulator metals - Photonic integrated circuits - Plasmonic waveguides - Signal processor - Surface plasmon polaritons

Classification code:921 Mathematics - 741.1 Light/Optics - 716.1 Information Theory and Signal Processing - 951 Materials Science - 714.3 Waveguides - 712.1 Semiconducting Materials - 711 Electromagnetic Waves - 714.2 Semiconductor Devices and Integrated Circuits

DOI:10.1016/j.optcom.2012.12.037

Database:Compendex

Accession number:20134216860585

Title:A correction algorithm on reducing energy excursion phenomenon

Authors:Wang, Zheng-Jie (1); Du, Yun-Fei (1); Hu, Bing-Liang (1); Liu, Lei (1); Kong, Liang (1); Yan, Peng (1); Wu, Qi-Jing (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an 710119, China; (2) Graduate University of Chinese Academy Sciences, Beijing 100049, China

Corresponding author:Hu, B.-L.(hbl@opt.ac.cn)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:42

Issue:8

Issue date:August 2013

Publication year:2013

Pages:891-896

Language:English

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:The imaging principle and the structure of a Hadamard transform spectral imager with a digital micro-mirror device are presented. A phenomenon of energy excursion which is caused by mismatching of the mask unit size and the detector pixel size is expatiated. To fix the recovery images, a matrix correction algorithm is proposed. The 7-order images of plants acquired by the Hadamard transform spectral imager are used and the correction algorithm is operated on the recovery images with error, which reduces the phenomenon of dark stripes effectively. In order to improve the image quality of the recovery images, two dots in and off two adjacent dark stripes are selected to show the spectrum curves. The results show the close spectrum curves of the dot off dark stripes and the different curves of the dot in dark stripes. The comparison illustrates the validity of the correction algorithm.

Number of references:15

Main heading:Algorithms

Controlled terms:Computer aided software engineering - Hadamard transforms - Profilometry - Recovery - Spectroscopy

Uncontrolled terms:Correction algorithms - Correction matrix - Dark stripe - Digital micro-mirror device - Energy excursion - Imaging principle - Matrix correction - Spectrum curves

Classification code:531 Metallurgy and Metallography - 723 Computer Software, Data Handling and Applications - 801 Chemistry - 921 Mathematics - 921.1 Algebra - 943.3 Special Purpose Instruments

DOI:10.3788/gzxb20134208.0891

Database:Compendex

Accession number:20130916050933

Title:Nondestructive scheme for measuring the attenuation coefficient of polymer optical fiber

Authors:Lin, Xiao (1); Ren, Liyong (1); Liang, Jian (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Ren, L.(renliy@opt.ac.cn)

Source title:Optics Letters

Abbreviated source title:Opt. Lett.

Volume:38

Issue:4

Issue date:February 15, 2013

Publication year:2013

Pages:528-530

Language:English

ISSN:01469592

E-ISSN:15394794

CODEN:OPLEDP

Document type:Journal article (JA)

Publisher:Optical Society of America, 2010 Massachusetts Ave, NW, Washington, DC, DC 20036-1023, United States

Abstract:Based on the fiber macrobending and the refractive index matching technologies, a measurement scheme is proposed to gauge the attenuation coefficient of polymer optical fibers in this Letter. It is noteworthy that, by realizing both the light injecting into and the light extracting out the fiber core via the fiber cladding, this scheme will not induce any destruction during the whole measurement. Some related experiments and the theoretical verifications are given together with the nondestructive measurement principle. The comparison between the experimental results of this scheme and that of the cut-back scheme indicates a good feasibility of our scheme. As a result, it is promised to have a potential application for achieving the on-line attenuation monitoring that has never been introduced. © 2013 Optical Society of America.

Number of references:11

Main heading:Plastic optical fibers

Controlled terms:Refractive index

Uncontrolled terms:Attenuation coefficient - Cut back - Fiber claddings - Fiber cores - Macro bending - Non destructive - Non-destructive measurement - Potential applications - Refractive index matching

Classification code:741.1 Light/Optics - 741.1.2 Fiber Optics

DOI:10.1364/OL.38.000528

Database:Compendex

Accession number:20140117166297

Title:Method for measuring dispersion of three projectiles impacting simultaneously

Authors:Dong, Tao (1); Hua, Deng-Xin (1); Li, Yan (1); Ni, Jin-Ping (2)

Author affiliation:(1) School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an 710048, China; (2) School of Opto-Electronic Engineering, Xi'an Technological University, Xi'an 710032, China

Corresponding author:Hua, D.-X.(xauthdx@163.com)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:42

Issue:11

Issue date:November 2013

Publication year:2013

Pages:1329-1333

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:As for the difficulty of measuring the dispersion of three projectiles impacting simultaneously, a method for measuring coordinate by using a single color linear array CCD camera was presented. A high-speed color linear array CCD camera was used, with red, blue and green sector-like line laser modules as the light source. When passing through the sharing screen of the CCD camera and the light source, the projectiles left projections on the projection board. Meanwhile, the camera captured the images of the projections and projectiles. Then the projection coordinates was identified and calculated by image processing and coordinate computation. By the principle of linear intersection, the impacting coordinates was obtained. The measuring principle and derivation of the measurement formula were described, and the measurement errors were analyzed and simulated. The proposed method, which proves to be effective in measuring the dispersion of three projectiles impacting simultaneously, provides guidance for the development of measuring system for the impacting coordinate of high RF weapons and multi-barrel weapons.

Number of references:13

Main heading:Projectiles

Controlled terms:CCD cameras - Dispersion (waves) - Dispersions - Image processing - Light sources

Uncontrolled terms:Impacting coordinate - Laser modules - Linear array CCD - Linear intersections - Measuring systems - Vertical targets

Classification code:654 Rockets and Rocket Propulsion - 711.1 Electromagnetic Waves in Different Media - 714.2 Semiconductor Devices and Integrated Circuits - 741 Light, Optics and Optical Devices - 744 Lasers - 951 Materials Science

DOI:10.3788/gzxb20134211.1329

Database:Compendex

Accession number:20134416920913

Title:Design and implementation of railcar management system based on SSH

Authors:Cheng, Long (1); Ge, Wei (1); Xue, Bin (2)

Author affiliation:(1) The Information Science and Technology Department Northwest University, Xi'an, China; (2) The Space Optical Technology Research Department Xi'an Institute of Optics and Precision Mechanics, Xi'an, China

Source title:Applied Mechanics and Materials

Abbreviated source title:Appl. Mech. Mater.

Volume:416-417

Monograph title:Linear Drives for Industry Applications IX

Issue date:2013

Publication year:2013

Pages:1489-1494

Language:English

ISSN:16609336

E-ISSN:16627482

ISBN-13:9783037858639

Document type:Conference article (CA)

Conference name:9th International Symposium on Linear Drives for Industry Applications, LDIA 2013

Conference date:July 7, 2013 - July 10, 2013

Conference location:Hangzhou, China

Conference code:100437

Sponsor:Zhejiang University; Linear Machines Institute of China Electrotechnical Society (CES); Institute of Electrical Engineering of Chinese Academy of Science

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:As the main means of transport, Railcar performs main task of railway equipment repairing department. For managing railcar information better, upgrading the version of the DMI program version, basic data version, revealing data version of GYK on railcar, the paper develops railcar management system which is based on the B/S mode of J2EE lightweight development framework Struts-Spring-Hibernate (SSH). This paper introduces the system design process and every function module in detail. Result proves that railcar management system improves the management efficiency of railcar, consists with the characteristics of the railcar and plays a positive role in the safety of railcar. © (2013) Trans Tech Publications, Switzerland.

Number of references:9

Main heading:Information management

Controlled terms:Digital storage - Industrial applications - Rail motor cars - Repair

Uncontrolled terms:Design and implementations - Development frameworks - GYK - Management efficiency - Railcars - Railway equipments - SSH - System design process

Classification code:682.1.1 Railroad Cars - 722.1 Data Storage, Equipment and Techniques - 903.2 Information Dissemination - 913 Production Planning and Control; Manufacturing - 913.5 Maintenance

DOI:10.4028/www.scientific.net/AMM.416-417.1489

Database:Compendex

Accession number:20132216376023

Title:Focal length testing method of long focal length laser optical system

Authors:Duan, Yaxuan (1); Chen, Yongquan (1); Zhao, Jianke (1); Li, Kun (1); Tian, Liude (1); Zhang, Jie (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi 710119, China

Corresponding author:Duan, Y.(6216366@163.com)

Source title:Zhongguo Jiguang/Chinese Journal of Lasers

Abbreviated source title:Zhongguo Jiguang

Volume:40

Issue:4

Issue date:April 2013

Publication year:2013

Article number:0408005

Language:Chinese

ISSN:02587025

CODEN:ZHJIDO

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:In order to measure the focal length of long focal length laser optical system, a method based on the principle of autocollimation, using fiber laser, beam splitter, flat mirror, precision angular instrument, charge couple device (CCD) and wavefront sensor is proposed. The fiber pinhole is placed at the focal point of laser optical system by testing the transmission wavefront of laser optical system with the Shack-Hartmann wavefront. Then, the CCD is placed at the best image surface by the scanning focus algorithm. The synchronization acquisition of the angular instrument and CCD is made. The focal length of laser optical system is calculated with the angle got by precision angular instrument and the deviation of pinhole image calculated by the centroid algorithm. The long focal length laser optical system of which the focal length is 7171 mm has been tested by this method. The uncertainty of test result is 13.48 mm (k=2). The test results show that this method is practical to the focal length testing of long focal length laser optical system.

Number of references:17

Main heading:Optical systems

Controlled terms:Fiber lasers - Instruments - Laser mirrors - Laser optics - Measurements - Sensors - Testing - Uncertainty analysis - Wavefronts

Uncontrolled terms:Centroid algorithm - Focal lengths - Laser optical systems - Long focal lengths - Shack-Hartmann wavefront - Synchronization acquisitions - Uncertainty - Wave front sensors

Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 922.1 Probability Theory - 801 Chemistry - 741 Light, Optics and Optical Devices - 711 Electromagnetic Waves - 423.2 Non Mechanical Properties of Building Materials: Test Methods

DOI:10.3788/CJL201340.0408005

Database:Compendex

Accession number:20133416653680

Title:Influence of driving frequency on discharge modes in a dielectric-barrier discharge with multiple current pulses

Authors:Jiang, Weiman (1); Tang, Jie (1); Wang, Yishan (1); Zhao, Wei (1); Duan, Yixiang (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an 710119, China; (2) Research Center of Analytical Instrumentation, Sichuan University, Chengdu 610064, China

Corresponding author:Tang, J.(tangjie1979@opt.ac.cn)

Source title:Physics of Plasmas

Abbreviated source title:Phys. Plasmas

Volume:20

Issue:7

Issue date:July 2013

Publication year:2013

Article number:073509

Language:English

ISSN:1070664X

CODEN:PHPAEN

Document type:Journal article (JA)

Publisher:American Institute of Physics, 2 Huntington Quadrangle, Suite N101, Melville, NY 11747-4502, United States

Abstract:A one-dimensional self-consistent fluid model was employed to investigate the effect of the driving frequency on the discharge modes in atmospheric-pressure argon discharge with multiple current pulses. The discharge mode was discussed in detail not only at current peaks but also between two adjacent peaks. The simulation results show that different transitions between the Townsend and glow modes during the discharge take place with the driving frequency increased. A complicated transition from the Townsend mode, through glow, Townsend, and glow, and finally back to the Townsend one is found in the discharge with the driving frequency of 8 kHz. There is a tendency of transition from the Townsend to glow mode for the discharge both at the current peaks and troughs with the increasing frequency. The discharge in the half period can all along operate in the glow mode with the driving frequency high enough. This is resulted from the preservation of more electrons in the gas gap and acquisition of more electron energy from the swiftly varying electric field with the increase in driving frequency. Comparison of the spatial and temporal evolutions of the electron density at different driving frequencies indicates that the increment of the driving frequency allows the plasma chemistry to be enhanced. This electrical characteristic is important for the applications, such as surface treatment and biomedical sterilization. © 2013 AIP Publishing LLC.

Number of references:30

Main heading:Glow discharges

Controlled terms:Electric fields

Uncontrolled terms:Argon discharges - Dielectric-barrier discharges - Driving frequencies - Electrical characteristic - Electron energies - Multiple currents - Plasma chemistries - Temporal evolution

Classification code:701.1 Electricity: Basic Concepts and Phenomena

DOI:10.1063/1.4817289

Database:Compendex

Accession number:20132016327496

Title:Steady-state multiple dark spatial solitons in closed-circuit photovoltaic media

Authors:Zhang, Y.H. (1); Hu, X.H. (2); Lu, K.Q. (2); Liu, B.Y. (1); Liu, W.Y. (1); Guo, R.L. (1)

Author affiliation:(1) Xi'an Technological University, Xi'an, 710032, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academic of Sciences, Xi'an, 710119, China

Corresponding author:Zhang, Y.H.(zhangyh1979@163.com)

Source title:Journal of Optical Technology (A Translation of Opticheskii Zhurnal)

Abbreviated source title:J Opt Technol

Volume:80

Issue:3

Issue date:March 1, 2013

Publication year:2013

Pages:135-141

Language:English

ISSN:10709762

CODEN:JOTEE4

Document type:Journal article (JA)

Publisher:Optical Society of America, 2010 Massachusetts Ave, NW, Washington, DC, DC 20036-1023, United States

Abstract:We theoretically study the formation of the steady state multiple dark photovoltaic solitons in the closed-circuit photovoltaic photorefractive crystal. The results indicate that the formation of the multiple dark photovoltaic solitons in the closed-circuit photovoltaic crystal is dependent on the initial width of the dark notch at the entrance face of the crystal. The number of the solitons generated increases with the initial width of the dark notch. If the initial width of the dark notch is small, only a fundamental soliton or Y-junction soliton pair is generated. As the initial width of the dark notch is increased, the dark notch tends to split into an odd (or even) number of multiple dark photovoltaic solitons sequence, which realizes a progressive transition from a lower-order soliton to a higher-order solitons sequence. When the multiple solitons are generated, the separations between adjacent dark solitons become slightly smaller. The soliton pairs far away from the center have bigger width and less visibility and they move away from each other as they propagate in the photorefractive nonlinear crystal. © 2013 Optical Society of America.

Number of references:28

Main heading:Solitons

Controlled terms:Photorefractive crystals

Uncontrolled terms:Dark spatial solitons - Fundamental solitons - Higher-order solitons - Nonlinear crystals - Photo-refractive - Photovoltaic crystals - Photovoltaic photorefractive crystal - Photovoltaic soliton

Classification code:741.1.1 Nonlinear Optics - 931.3 Atomic and Molecular Physics

DOI:10.1364/JOT.80.000135

Database:Compendex

Accession number:20132616445002

Title:A passively Q-switched thulium-doped fiber laser with single-walled carbon nanotubes

Authors:Ma, H.F. (1); Wang, Y.G. (1); Zhou, W. (1); Long, J.Y. (1); Shen, D.Y. (1); Wang, Y.S. (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) Department of Applied Physics, Hong Kong Polytechnic University, Hong Kong, Hong Kong; (3) School of Science, Xi'An Jiaotong University, Xi'an, 710049, China

Source title:Laser Physics

Abbreviated source title:Laser Phys.

Volume:23

Issue:3

Issue date:March 2013

Publication year:2013

Article number:035109

Language:English

ISSN:1054660X

E-ISSN:15556611

Document type:Journal article (JA)

Publisher:Institute of Physics Publishing, Temple Circus, Temple Way, Bristol, BS1 6BE, United Kingdom

Abstract:We demonstrate a passively Q-switched thulium-doped fiber laser by using single-walled carbon nanotube (SWCNT) polyvinyl alcohol (PVA) composite film as the saturable absorber (SA). A relatively large mode area on the SA was employed to avoid damage of the SWCNT/PVA film and benefit pulsed laser operation. Stable pulses of 85-164 kHz repetition rate were generated at 1967 nm with a maximum average output power of 103 mW. The single pulse energy was up to &sim;0.63 μJ with &sim;0.87 μs pulse duration. © 2013 Astro Ltd.

Number of references:22

Main heading:Q switching

Controlled terms:Composite films - Fiber lasers - Q switched lasers - Saturable absorbers - Single-walled carbon nanotubes (SWCN) - Thulium

Uncontrolled terms:Average output power - Passively Q-switched - Poly (vinyl alcohol) (PVA) - Pulse durations - Pulsed laser operation - Single pulse energy - Singlewalled carbon nanotube (SWCNT) - Thulium-doped fibers

Classification code:547.2 Rare Earth Metals - 714.2 Semiconductor Devices and Integrated Circuits - 744 Lasers - 761 Nanotechnology

DOI:10.1088/1054-660X/23/3/035109

Database:Compendex

Accession number:20134416940661

Title:A real-time image magnificationtechnology based on edge prediction

Authors:Huang, Biao (1); Tian, Yan (1); Yao, Dawei (1); Yang, Xiaojun (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Huang, B.(huangbiao336@163.com)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:42

Issue:SUPPL.1

Issue date:2013

Publication year:2013

Pages:268-273

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:To solve the problem of edge blurring and edge jaggingIn image zooming process, a new image magnification algorithm based on edge prediction was proposed. In the algorithm, an image was firstly divided into a few sub-region units and then edges of the magnified image were predicted according to the correlation of the pixels in sub-region units of the original image, from which both the non-edge pixels and the edge pixels of the desired image could be found. Finally, the non-edge pixels and the edge pixels were calculated by liner interpolation in different regions and diagonal interpolation respectively, which effectively suppress the edge blurring and edge jagging. The algorithm could magnify a gray image to any times within limits with acceptable result. After comparing with some other algorithms and testing the practical performance of the algorithm in hardware device it turns out that the algorithm has clear advantages over the other algorithms in terms of quality and the relatively low time complexity which is slightly higher than the time complexity of the bilinear. Consequently, the algorithm can be used for both hardware and software solutions to video image.

Number of references:9

Main heading:Edge detection

Controlled terms:Algorithms - Forecasting - Hardware - Interpolation - Pixels

Uncontrolled terms:Edge blurring - Edge jagging - Hardware and software - Hardware devices - Image magnification - Liner interpolation - Magnified images - Real-time images

Classification code:605 Small Tools and Hardware - 716 Telecommunication; Radar, Radio and Television - 723 Computer Software, Data Handling and Applications - 723.5 Computer Applications - 921 Mathematics - 921.6 Numerical Methods

Database:Compendex

Accession number:20131616216202

Title:Femtosecond laser-induced permanent anisotropy in bacteriorhodopsin films and applications in optical data storage

Authors:Yu, Xianghua (1); Yao, Baoli (1); Lei, Ming (1); Gao, Peng (1); Ma, Baiheng (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xian Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xian, 710119, China

Corresponding author:Yao, B.(yaobl@opt.ac.cn)

Source title:Journal of Modern Optics

Abbreviated source title:J. Mod. Opt.

Volume:60

Issue:4

Issue date:February 1, 2013

Publication year:2013

Pages:309-314

Language:English

ISSN:09500340

E-ISSN:13623044

CODEN:JMOPEW

Document type:Journal article (JA)

Publisher:Taylor and Francis Ltd., 4 Park Square, Milton Park, Abingdon, Oxfordshire, OX14 4RN, United Kingdom

Abstract:In polymeric films of bacteriorhodopsin (BR) a photoconversion product named F<inf>540</inf>-state, which is excited by 790 nm femtosecond laser pulses, is stable either for photochemical reaction or thermal pathway. The optical properties of the F<inf>540</inf>-state were studied, and Jones-matrix theory was adopted to analyze the photoinduced anisotropy of the F <inf>540</inf>-state. Based on the permanently photoinduced anisotropy, write-once-read-many (WORM) optical data storage was demonstrated by using two polarization states of femtosecond pulsed laser. Since the polarization information is also written on the storage media, it is impossible to copy it in a common way. This storage technique has a potential application in advanced optical security. © 2013 Copyright Taylor and Francis Group, LLC.

Number of references:16

Main heading:Optical data storage

Controlled terms:Excited states - Optical properties - Photochemical reactions - Polarization - Ultrafast lasers - Ultrashort pulses

Uncontrolled terms:Bacteriorhodopsin - Bacteriorhodopsin (bR) - Bacteriorhodopsin films - Femtosecond pulsed laser - Permanent anisotropy - Photo-induced anisotropy - Polarization state - Write-once-read-many

Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems - 744.1 Lasers, General - 931.3 Atomic and Molecular Physics

DOI:10.1080/09500340.2013.774067

Database:Compendex

Accession number:20132416411989

Title:A novel laser gain medium: Micro-sphere array cooled by refractive index-matched coolant

Authors:Gui, Luo (1); Ding, Jianyong (2); She, Jiangbo (3); Peng, Bo (3); Wei, Wei (2); Fan, Dianyuan (1)

Author affiliation:(1) Key Laboratory on High Power Laser and Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Science (CAS), Shanghai 201800, China; (2) Academy of Optoelectronics Engineering, Nanjing University of Posts and Telecommunications, Nanjing, Jiangsu 210046, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science (CAS), Xi'an, Shaanxi 710119, China; (4) Key Laboratory for Organic Electronics and Information Displays, Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, Nanjing, Jiangsu 210046, China

Corresponding author:Peng, B.(iambpeng@njupt.edu.cn)

Source title:Optics Communications

Abbreviated source title:Opt Commun

Volume:305

Issue date:2013

Publication year:2013

Pages:91-95

Language:English

ISSN:00304018

CODEN:OPCOB8

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:A micro-sphere array laser gain medium cooled by refractive index-matched coolant was demonstrated for the first time to our knowledge. The new concept is possessed of potential to improve thermal management, to increase the thermal load capacity and to build large scale laser medium with small-sized solid laser materials. The feasibility was experimentally proved with an oscillator experiment in which reliable laser output was observed: the maximum output was 113.3 mJ for the pump energy of 765.8 mJ, the threshold was 131.7 mJ and the slope efficiency was 19%. Promising improvement could be achieved by employing methods for maintaining accurate refractive index matching during the lasing process. © 2013 Elsevier B.V.

Number of references:6

Main heading:Refractive index

Controlled terms:Coolants - High power lasers - Pumping (laser) - Solar cell arrays - Spheres - Temperature control

Uncontrolled terms:Gain medium - Large scale lasers - Laser gain medium - Laser materials - Maximum output - Refractive index matching - Slope efficiencies - Thermal load capacity

Classification code:803 Chemical Agents and Basic Industrial Chemicals - 744.1 Lasers, General - 741.1 Light/Optics - 731.3 Specific Variables Control - 631 Fluid Flow - 621 Nuclear Reactors - 615.2 Solar Power

DOI:10.1016/j.optcom.2013.04.072

Database:Compendex

Accession number:20132616448274

Title:Polarization-dependent optical guiding in low repetition frequency femtosecond laser photowritten type II fused silica waveguides

Authors:Li, Dongjuan (1); Lin, Ling (1); Lü, Baida (3); Cheng, Guanghua (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institution of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100049, China; (3) Institute of Laser Physics and Chemistry, Sichuan University, Chengdu, Sichuan 610064, China

Corresponding author:Li, D.(lidongjuan@opt.cn)

Source title:Guangxue Xuebao/Acta Optica Sinica

Abbreviated source title:Guangxue Xuebao

Volume:33

Issue:5

Issue date:May 2013

Publication year:2013

Article number:0532001

Language:Chinese

ISSN:02532239

CODEN:GUXUDC

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:The dependences of self-assembled nanograting in fused silica on low repetition frequency femtosecond laser parameters and scanning parameters are investigated. The results show that the filling factor of nanograting for scanning path cross section depends on the writing parameters. The type II waveguide in fused silica can be written under some writing condition and shows polarization-dependent guiding properties. Similar polarization-dependent guiding properties with 100 kHz situation is proved in experiment by hexagonal structures assembled from type II traces. Ideal models of the cross-sectional refractive index profiles of type II waveguides and the hexagonal structures are constructed. Corresponding modes are simulated using the finite element analysis method. It is found that the polarization-dependent optical guiding properties of type II waveguides are due to polarization-dependent scattering of nanograting rather than form birefringence in theory and experiment.

Number of references:25

Main heading:Polarization

Controlled terms:Experiments - Finite element method - Laser optics - Optical properties - Ultrashort pulses - Waveguides

Uncontrolled terms:Finite element analysis method - Form birefringence - Fused silica waveguides - Hexagonal structures - Nanograting - Refractive index profiles - Repetition frequency - Scanning parameters

Classification code:714.3 Waveguides - 741.1 Light/Optics - 744.1 Lasers, General - 901.3 Engineering Research - 921.6 Numerical Methods

DOI:10.3788/AOS201333.0532001

Database:Compendex

Accession number:20134917048378

Title:A multi-focus image fusion method based on image blocks

Authors:Wang, Qi (1); Song, Zongxi (1); Gao, Wei (1); Zhao, Bingjie (1)

Author affiliation:(1) Space Optics Laboratory, Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100039, China

Corresponding author:Song, Z.(songxi@opt.ac.cn)

Source title:Journal of Information and Computational Science

Abbreviated source title:J. Inf. Comput. Sci.

Volume:10

Issue:16

Issue date:November 1, 2013

Publication year:2013

Pages:5209-5216

Language:English

ISSN:15487741

Document type:Journal article (JA)

Publisher:Binary Information Press, Flat F 8th Floor, Block 3, Tanner Garden, 18 Tanner Road, Hong Kong

Abstract:This paper presents a method for fusing multi-focus images directly based on analyzing image blocks. Firstly, we separate the clear domains and fuzzy domains by setting a threshold value for the average gradients difference of image blocks corresponding. In clear domains, all the pixels are selected directly as the corresponding pixels in the fused image instead of any kind of transform. However, in processing fuzzy domains, we use a fusion method based on the mean gradients of image blocks. The experimental results show that our method is effective and obviously superior to the multi-scale decomposition-based methods such as wavelet transform and wavelet packet transform. © 2013 Binary Information Press.

Number of references:12

Main heading:Image fusion

Controlled terms:Pixels

Uncontrolled terms:Average gradient - Fused images - Fusion methods - Fuzzy domain - Image blocks - Multifocus image fusion - Multifocus images - Wavelet packet transforms

Classification code:723.2 Data Processing and Image Processing - 723.5 Computer Applications

DOI:10.12733/jics20102360

Database:Compendex

Accession number:20133216576134

Title:Experimental study of the damage of silicon photoelectric detector materials induced by repetitively-pulsed femtosecond laser

Authors:Cai, Yue (1); Ma, Zhi-Liang (1); Zhang, Zhen (1); Cheng, Guang-Hua (2); Ye, Xi-Sheng (1); Cheng, De-Yan (1)

Author affiliation:(1) State Key Laboratory of Laser Interaction with Matter, Northwest Institute of Nuclear Technology, Xi'an 710024, China; (2) State Key Laboratory of Transient Optics and Photonics, Xian Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710068, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8796

Monograph title:2nd International Symposium on Laser Interaction with Matter, LIMIS 2012

Issue date:2013

Publication year:2013

Article number:87960I

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819496393

Document type:Conference article (CA)

Conference name:2nd International Symposium on Laser Interaction with Matter, LIMIS 2012

Conference date:September 9, 2012 - September 12, 2012

Conference location:Xi'an, Shaanxi, China

Conference code:97999

Sponsor:Northwest Institute of Nuclear Technology; Mechanics and Physics; Chinese Optical Society; European Laser Institute; The Optical Society

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:The experimental setup was established for studying damage effects on silicon photoelectric detector materials induced by 800nm and 150fs repetitively-pulsed laser. The detector is irradiated by single shot and multiple shots respectively. The laser damage thresholds of silicon photoelectric detector material were measured. The surface morphologies of the material damaged by laser were analyzed. The surfaces damaged by laser with different energy were compared. The thresholds vary with the number of laser shots. According to the accumulation theory, the damage threshold is the power function of the shot number. Experimental results show that threshold of single shot that damages the silicon photoelectric detector is 0.156J/cm2. The laser damage threshold decreases with the increasing number of laser pulses, but the minimum value exists. The damage is mainly caused by the mechanical effect rather than thermal effect. In fact, the thermal effect during the interaction is so small that it can't even be observed. Resistivity of the silicon photoelectric detector irradiated by femtosecond laser decreases and finally tends to a constant value. © 2013 SPIE.

Number of references:10

Main heading:Laser damage

Controlled terms:Laser tissue interaction - Photonic devices - Plasma interactions - Silicon - Ultrashort pulses

Uncontrolled terms:Constant values - Damage threshold - Experimental studies - Laser damage threshold - Mechanical effects - Multi-shot - Photoelectric detectors - Power functions

Classification code:712.1.1 Single Element Semiconducting Materials - 717 Optical Communication - 744 Lasers - 932.3 Plasma Physics

DOI:10.1117/12.2011136

Database:Compendex

Accession number:20133716741518

Title:Synthesis and optical properties of NdF<inf>3</inf> nanocrystals from one source precursor

Authors:Li, Dongdong (1); She, Jiangbo (2); Peng, Bo (2)

Author affiliation:(1) School of Electronic Engineering, Xi'an University of Posts and Telecommunications, Xi'an Shaanxi, 710121, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an Shannxi, 710119, China

Corresponding author:Li, D.(dongdong@opt.ac.cn)

Source title:International Journal of Nanomanufacturing

Abbreviated source title:Int. J. Nanomanufacturing

Volume:9

Issue:3-4

Monograph title:Special Issue on New Energy Materials and Nanotechnology - Part I

Issue date:2013

Publication year:2013

Pages:279-285

Language:English

ISSN:17469392

E-ISSN:17469406

Document type:Conference article (CA)

Publisher:Inderscience Enterprises Ltd., Editorial Office, P O Box 735, Olney, Bucks., MK46 5WB, MK46 5WB, United Kingdom

Abstract:The monodisperse colloidal NdF<inf>3</inf> nanorods were synthesised via one-step thermolysis of Nd(CF<inf>3</inf>COO)<inf>3</inf> 3H<inf>2</inf>O in a hot trioctylphosphine oxide solution. The resulting product was characterised by Fourier transform infrared analysis, transmission electron microscopy and photoluminescence spectroscopy. The rod-like nanocrystals possess well shaped fenestral structures. Optical spectra exhibited the colloidal NdF<inf>3</inf> nanoparitcles possessing typical Nd3+ ion absorption and photoluminescence emission. The emission cross-section of 4F <inf>3/2</inf> &rarr 4I<inf>11/2</inf> fluorescence transition was 2.12 × 10-20 cm2, and comparable with some laser glasses. Copyright © 2013 Inderscience Enterprises Ltd.

Number of references:15

Main heading:Nanocrystals

Controlled terms:Judd-Ofelt theory - Nanorods - Nanotechnology - Photoluminescence spectroscopy - Transmission electron microscopy

Uncontrolled terms:Emission cross-section - Fluorescence transitions - Fourier transform infra reds - Ion absorption - Laser glass - Mono-disperse - Optical spectra - Trioctylphosphine oxide

Classification code:741.3 Optical Devices and Systems - 761 Nanotechnology - 931.3 Atomic and Molecular Physics - 933 Solid State Physics

DOI:10.1504/IJNM.2013.056053

Database:Compendex

Accession number:20141317516360

Title:Design of hybrid refractive-diffractive visible lens with small F-number

Authors:Wang, Hu (1); Luo, Jianjun (1)

Author affiliation:(1) School of Astronautics, Northwestern Polytechnical University, Xi'an 710072, China; (2) Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an 710119, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8910

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Spectrometer Technologies and Applications

Issue date:2013

Publication year:2013

Article number:89100H

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497796

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:A hybrid diffractive/refractive visible lens with small F-number of 1.5 is proposed based on the special chromatic aberration of diffractive optical element. It is used in the optical system of visible camera for space debris. The visible lens has an effective focal length of 100 mm, a working wavelength range of 0.5-0.8μm and a field of view 6°. Firstly, the lens system consists of three groups and five lenses. Then, aspheric and diffractive surfaces are used in order to correct high-order aberrations resulting from large relative aperture. Finally, the lens is designed with the help of Code-v optical design software. The lens is evaluated by energy concentration, the dispersion spot diameter, lateral color, distortion, the simulated final design shows adequate image quality. The method puts forward a new ideas for visible camera for space debris optical system design and had an important reference significance and application value. © 2013 SPIE.

Number of references:12

Main heading:Aberrations

Controlled terms:Cameras - Diffractive optics - Optical design - Optical systems

Uncontrolled terms:Aspheric surfaces - Chromatic aberration - Diffractive surfaces - Effective focal lengths - Energy concentration - High-order aberrations - Lens designs - Optical-design software

Classification code:741 Light, Optics and Optical Devices - 742.2 Photographic Equipment

DOI:10.1117/12.2032432

Database:Compendex

Accession number:20141317510097

Title:A multi-exposure image fusion method based on wavelet packet transform

Authors:Wang, Qi (1); Song, Zongxi (1); Gao, Wei (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100039, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8907

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications

Issue date:2013

Publication year:2013

Article number:89070X

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497765

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:This paper presents a method for multi-exposure images fusion based on wavelet packet transform, combining the local energy distributions of multi-exposure images with the edge detection. After decomposing two images involved in fusion into sub images in low-frequency and high-frequency with wavelet packet transform, we use different methods for low-frequency and high-frequency to obtain fusion coefficients. In low frequency processing, the method that threshold value is set for local energy is used while the edge detection method is used in high frequency, where the edge detection operator help compute the information quantity of different high frequency images. Then the coefficients for fusion are selected according to different strategies adopted for low- and high-frequency. Finally, the fusion image is reconstructed through inverse wavelet packet transform. The result shows that the fusion method is effective and the fusion image can preserve the details of the each input image successfully. © 2013 Copyright SPIE.

Number of references:13

Main heading:Image fusion

Controlled terms:Edge detection - Thermography (imaging)

Uncontrolled terms:Edge detection methods - Edge-detection operators - Fusion coefficients - High frequency HF - Information quantity - Local energy - Multi-exposure images - Wavelet packet transforms

Classification code:716 Telecommunication; Radar, Radio and Television - 723.2 Data Processing and Image Processing - 742.1 Photography

DOI:10.1117/12.2031837

Database:Compendex

Accession number:20134616972680

Title:Multiring large-mode-area delivery fiber for high power

Authors:Li, Lu (1); Zhang, Aidong (1); Zhan, Huan (1); He, Jianli (1); Shi, Tengfei (1); Zhou, Zhiguang (1); Xiao, Xusheng (1); Lin, Aoxiang (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi'an 710119, China; (2) Graduate School of Chinese Academy of Sciences (CAS), Beijing 100049, China

Corresponding author:Lin, A.(aoxiang@opt.ac.cn)

Source title:Applied Optics

Abbreviated source title:Appl. Opt.

Volume:52

Issue:31

Issue date:November 1, 2013

Publication year:2013

Pages:7407-7410

Language:English

ISSN:1559128X

E-ISSN:15394522

CODEN:APOPAI

Document type:Journal article (JA)

Publisher:Optical Society of American (OSA)

Abstract:The study presents a novel design of multiring delivery fiber with large mode area for high power. Using a FiberCAD method, we investigated a fiber whose core is surrounded by alternative low- and high-index rings. Based on our calculation, the effective area is 400 μm2 at 1.08 μm, larger than the ~280 μm2 of conventional step-index fiber (20/400). The macrobending loss at 1.08 μm is estimated to be 1 × 10-3 dB/m, approximately one-third that of conventional step-index fiber (20/400). The single-mode operation can be achieved by the macrobending loss contrast between the fundamental mode (<1 dB/m) and high-order mode (>100 dB/m). The results indicate that multiring delivery fiber fabricated by modified chemical vapor deposition process is a promising candidate for high-power transmission. © 2013 Optical Societyof America.

Number of references:25

Main heading:Fibers

Controlled terms:Chemical vapor deposition - Fiber optic sensors

Uncontrolled terms:Fundamental modes - High order mode - High-power transmissions - Large mode area - Macro-bending loss - Modified chemical vapor depositions - Single mode operation - Step-index fibers

Classification code:732.2 Control Instrumentation - 802.2 Chemical Reactions - 812 Ceramics, Refractories and Glass - 817 Plastics and Other Polymers: Products and Applications

DOI:10.1364/AO.52.007407

Database:Compendex

Accession number:20141317510098

Title:An improved image fusion algorithm based on wavelet transform

Authors:Duan, Zewei (1); Wen, Desheng (1); Song, Zongxi (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100049, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8907

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications

Issue date:2013

Publication year:2013

Article number:89070Y

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497765

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:Image fusion takes a significant part in the technology of information enhancement. By analyzing the advantages and disadvantages of previous methods , this paper proposes an improved wavelet-transform-algorithm, which both considers the fusion methods of low-frequency and high-frequency components: On the low-frequency sub-band aspect, introducing a border detector operator in order to collect the border information of images that can be the basis of selective fusion method; On the high-frequency sub-band aspect, applying the local-standard-deviation to being the basis of selective and weighted-averaging fusion method. The experiments reveal that the proposed algorithm contributes to enhancing the definition and contract ratio of the fused images, thereby it's a valid method. © 2013 Copyright SPIE.

Number of references:14

Main heading:Algorithms

Controlled terms:Detectors - Image fusion - Thermography (imaging)

Uncontrolled terms:border information - Fusion methods - High frequency components - High frequency HF - Image fusion algorithms - local-standard-deviation - Low-frequency - wavelet-transform-algorithm

Classification code:723 Computer Software, Data Handling and Applications - 723.2 Data Processing and Image Processing - 742.1 Photography - 914 Safety Engineering - 921 Mathematics

DOI:10.1117/12.2031878

Database:Compendex

Accession number:20141117461493

Title:Image super-resolution via non-local steering kernel regression regularization

Authors:Zhang, Kaibing (1); Gao, Xinbo (2); Tao, Dacheng (3); Li, Xuelong (4)

Author affiliation:(1) School of Computer and Information Science, Hubei Engineering University, Xiaogan 432000, China; (2) School of Electronic Engineering, Xidian University, Xi'an 710071, China; (3) QCIS and FEIT, University of Technology, Sydney, NSW 2007, Australia; (4) Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an 710119, China

Source title:2013 IEEE International Conference on Image Processing, ICIP 2013 - Proceedings

Abbreviated source title:IEEE Int. Conf. Image Process., ICIP - Proc.

Monograph title:2013 IEEE International Conference on Image Processing, ICIP 2013 - Proceedings

Issue date:2013

Publication year:2013

Pages:943-946

Article number:6738195

Language:English

Document type:Conference article (CA)

Conference name:2013 20th IEEE International Conference on Image Processing, ICIP 2013

Conference date:September 15, 2013 - September 18, 2013

Conference location:Melbourne, VIC, Australia

Conference code:103050

Sponsor:The Institute of Electrical and Electronics Engineers (IEEE) Signal Processing Society

Publisher:IEEE Computer Society

Abstract:In this paper, we employ the non-local steering kernel regression to construct an effective regularization term for the single image super-resolution problem. The proposed method seamlessly integrates the properties of local structural regularity and non-local self-similarity existing in natural images, and solves a least squares minimization problem for obtaining the desired high-resolution image. Extensive experimental results on both simulated and real low-resolution images demonstrate that the proposed method can restore compelling results with sharp edges and fine textures. © 2013 IEEE.

Number of references:10

Main heading:Least squares approximations

Controlled terms:Image processing - Optical resolving power - Regression analysis

Uncontrolled terms:High resolution image - Image super-resolution - Least squares minimization - Local structural regularities - Local structure - Low resolution images - Self-similarities - Steering kernel regressions

Classification code:741 Light, Optics and Optical Devices - 741.1 Light/Optics - 921.6 Numerical Methods - 922.2 Mathematical Statistics

DOI:10.1109/ICIP.2013.6738195

Database:Compendex

Accession number:20141317501217

Title:Analysis of terahertz generation characteristic affected by injured photoconductive antenna

Authors:Li, Hui (1); Fan, Wen-Hui (1); Liu, Jia (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Fan, W.-H.(fanwh@opt.ac.cn)

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8909

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Terahertz Technologies and Applications

Issue date:2013

Publication year:2013

Article number:89090I

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497789

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:In this paper, we deployed a home-made THz time-domain system and experimentally investigated the influence of impairment on photoconductive antenna. The low temperature grown GaAs photoconductive antenna (PCA) was used as THz emitter and a &lang;110&rang; ZnTe crystal modulating the probe beam to detect the THz field based on electro-optic sampling. By adjusting the position of laser spot on PCA gap, we found that the generated THz signal was quite different as the laser beam irradiating on different position of the antenna's gap. Moreover, we found that the small burned holes on the edge of both metal electrodes may affect the electric field of the antenna. Furthermore, we simulated the electric field of the PCA with a DC biased voltage applied across the electrodes, and found that the simulation results agreed with the experimental phenomenon, which can well demonstrated that the impairments on the antenna electrodes have a great influence on THz generation. © 2013 Copyright SPIE.

Number of references:18

Main heading:Antennas

Controlled terms:Electric fields - Electrodes - Microwave antennas - Zinc compounds

Uncontrolled terms:Antenna simulations - Electrooptic sampling - Low-temperature-grown GaAs - Metal electrodes - Photoconductive antennas - Position of laser - Terahertz generation - THz generation

Classification code:701.1 Electricity: Basic Concepts and Phenomena - 704.1 Electric Components - 716 Telecommunication; Radar, Radio and Television - 804.1 Organic Compounds

DOI:10.1117/12.2033033

Database:Compendex

Accession number:20141317510090

Title:Infrared and visible image fusion based on region growing and contourlet transform

Authors:Zhao, Bingjie (1); Gao, Wei (1); Song, Zongxi (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100049, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8907

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications

Issue date:2013

Publication year:2013

Article number:89070P

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497765

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:According to the characteristics of infrared and visible images, a new image fusion method based on region growing and contourlet transform is proposed in this paper. To obtain more complementary information, the method is designed as a two-stage procedure. Firstly, the input infrared image is processed with region growing to segment the thermal target. Different fusion rules are adopted in target and background regions, respectively. For the target region, local energy is utilized as the fusion rule of the first fusion to fuse the thermal target and the visible image, while for the non-target region, we reserve the visible background information. Secondly, in order to fully add original information of the source images and avoid loss of information caused by segmentation, we make the second fusion between the visible image and the result image of the one-stage fusion. For good properties of localization, directionality and anisotropy, we adopt contourlet transform as the second fusion method. Experiments are carried out and the results show that our method is clearer in visual quality and effective in quantitative evaluations and the fused images are better than those resulting of using wavelet transform and contourlet transform. © 2013 Copyright SPIE.

Number of references:13

Main heading:Image fusion

Controlled terms:Image segmentation - Infrared imaging - Thermography (imaging)

Uncontrolled terms:Background information - Contourlet transform - Image fusion methods - Infrared and visible image - Quantitative evaluation - Region growing - Target and background - Visible image

Classification code:723.2 Data Processing and Image Processing - 742.1 Photography - 746 Imaging Techniques

DOI:10.1117/12.2031627

Database:Compendex

Accession number:20141117463717

Title:Image fusion based on non-negative matrix factorization and infrared feature extraction

Authors:Mou, Jiao (1); Gao, Wei (1); Song, Zongxi (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China

Source title:Proceedings of the 2013 6th International Congress on Image and Signal Processing, CISP 2013

Abbreviated source title:Proc. Int. Congr. Image Signal Process., CISP

Volume:2

Monograph title:Proceedings of the 2013 6th International Congress on Image and Signal Processing, CISP 2013

Issue date:2013

Publication year:2013

Pages:1046-1050

Article number:6745210

Language:English

Document type:Conference article (CA)

Conference name:2013 6th International Congress on Image and Signal Processing, CISP 2013

Conference date:December 16, 2013 - December 18, 2013

Conference location:Hangzhou, China

Conference code:103106

Publisher:IEEE Computer Society

Abstract:A new effective fusion method based on non-negative matrix factorization (NMF) and infrared target extraction is presented for infrared and visible images fusion. The two source images are taken as original data in NMF analysis, from which the feature base containing the global features of the source images can be extracted. The feature base image is replaced by the adjusted visible image, which is histogram matched with the raw feature base. As non-negative matrix factorization image fusion algorithm lacks details, we introduce a local gradient as an active measure, and combine weighting and selection methods to fuse the visible image with the feature base image. Then the target regions from infrared image are segmented through edge detection, region growing and morphological processing methods. The segmented target regions are fused with the background regions of the feature base image. Experiment indicates that the proposed method is simple in calculation. And it can retain texture details of visible image, highlight the thermal target of infrared image and enhance the readability of source images. © 2013 IEEE.

Number of references:12

Main heading:Image processing

Controlled terms:Edge detection - Factorization - Feature extraction - Image fusion - Infrared imaging

Uncontrolled terms:Background region - Feature base - Image fusion algorithms - Infrared and visible image - Infrared features - Morphological processing - Nonnegative matrix factorization - Selection methods

Classification code:716 Telecommunication; Radar, Radio and Television - 723.2 Data Processing and Image Processing - 746 Imaging Techniques - 921 Mathematics

DOI:10.1109/CISP.2013.6745210

Database:Compendex

Accession number:20141317510150

Title:A new algorithm of inter-frame filtering in IR image based on threshold value

Authors:Liu, Wei (1); Leng, Hanbing (1); Chen, Weining (1); Yang, Hongtao (1); Xie, Qingsheng (1); Yi, Bo (1); Zhang, Haifeng (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, 710119, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8907

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications

Issue date:2013

Publication year:2013

Article number:89072N

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497765

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:This paper proposed a new algorithm of inter-frame filtering in IR image based on threshold value for the purpose of solving image blur and smear brought by traditional inter-frame filtering algorithm. At first, it finds out causes of image blur and smear by analyzing general inter-frame filtering algorithm and dynamic inter-frame filtering algorithm, hence to bring up a new kind of time-domain filter. In order to obtain coefficients of the filter, it firstly gets difference image of present image and previous image, and then, it gets noisy threshold value by analyzing difference image with probability analysis method. The relationship between difference image and threshold value helps obtaining the coefficients of filter. At last, inter-frame filtering method is adopted to process pixels interrupted by noise. The experimental result shows that this algorithm has successfully repressed IR image blur and smear, and NETD tested by traditional inter filtering algorithm and the new algorithm are respectively 78mK and 70mK, which shows it has a better noise reduction performance than traditional ones. The algorithm is not only applied to still image, but also to sports image. As a new algorithm with great practical value, it is easy to achieve on FPGA, of excellent real-time performance and it effectively extends application scope of time domain filtering algorithm. © 2013 Copyright SPIE.

Number of references:8

Main heading:Algorithms

Controlled terms:Infrared imaging - Signal filtering and prediction - Thermography (imaging) - Time domain analysis

Uncontrolled terms:Blurring - Inter-frame - IR camera - Noise - Smearing - Time domain

Classification code:723 Computer Software, Data Handling and Applications - 731.1 Control Systems - 742.1 Photography - 746 Imaging Techniques - 921 Mathematics

DOI:10.1117/12.2033067

Database:Compendex

Accession number:20141317501178

Title:Theoretical and experimental study on methods for increasing squeezed level in the generation of squeezed light

Authors:Feng, Fei (1); Qu, Wen-Yan (1); Song, Jia-Zheng (1); Zhang, Tong-Yi (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, 710119, China; (2) University of Chinese Academy of Sciences, Beijing, 100039, China

Corresponding author:Zhang, T.-Y.(tyzhang@opt.ac.cn)

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8906

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Laser Communication Technologies and Systems

Issue date:2013

Publication year:2013

Article number:89061W

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497758

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:We demonstrate the methods for increasing the observed squeezing level in the generation of squeezed states of light at 1064 nm with periodically poled KTiOPO<inf>4</inf> (PPKTP) crystal. We analyze the technical limits to the reduction of noise in the squeezed quadrature theoretically, including the intra-cavity loss of the optical parametric amplifier (OPA) cavity, the normalized amplitude, the detection frequency, and the mode matching on the balanced homodyning stage. To observe a high degree of squeezing, we improve the quality of mode matching into the OPA cavity and the mode cleaning (MC) cavity experimentally. By optimizing mode matching of the light into cavities, the finesse of the cavities would be higher in practice and the desirable spatial mode can be realized. As the intensity noise of the laser light reach the shot noise limit above the frequency of 1 MHz, which is sufficient for our experiment, so the MC cavity is incorporated to filter higher-order transverse modes of the local oscillator (LO) beam for the balanced homodyne detection. The experimental and theoretical results show that it is essential to optimize the mode matching efficiency to generate and detect high degree of squeezing otherwise an inefficiency mode matching will throw away the squeezing and transform the squeezed field into a vacuum field. © 2013 Copyright SPIE.

Number of references:10

Main heading:Optimization

Controlled terms:Homodyne detection - Light amplifiers - Optical parametric amplifiers - Squeezed light

Uncontrolled terms:Balanced homodyne detection - Detection frequency - Local oscillators - Mode matching - Optical parametric amplifiers (OPA) - Periodically poled - Squeezed level - Technical limits

Classification code:714 Electronic Components and Tubes - 714.2 Semiconductor Devices and Integrated Circuits - 716.1 Information Theory and Signal Processing - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 921.5 Optimization Techniques

DOI:10.1117/12.2034574

Database:Compendex

Accession number:20142017710723

Title:Mid-infrared fluorescence of Ho-doped water-free fluorotellurite glasses

Authors:He, Jianli (1); Zhan, Huan (1); Zhou, Zhiguang (1); Zhang, Aidong (1); Lin, Aoxiang (1)

Corresponding author:Lin, A.(aoxiang@opt.ac.cn)

Source title:Asia Communications and Photonics Conference, ACP

Abbreviated source title:Asia Commun. Photonics Conf.

Monograph title:Asia Communications and Photonics Conference, ACP 2013

Issue date:2013

Publication year:2013

Language:English

ISSN:2162108X

ISBN-13:9781557529893

Document type:Conference article (CA)

Conference name:Asia Communications and Photonics Conference, ACP 2013

Conference date:November 12, 2013 - November 15, 2013

Conference location:Beijing, China

Conference code:104975

Publisher:Optical Society of America

Abstract:Ho3+-doped water-free fluorotellurite glasses and fiber canes were reported. Comparable long fluorescence lifetimes of 0.81 ms at 2.85 μm and 10.01 ms at 2.04 μm were obtained. © OSA 2013.

Number of references:5

Main heading:Photonics

Controlled terms:Fluorescence - Glass

Uncontrolled terms:Fluorescence lifetimes - Fluoro-tellurite glass - Midinfrared

Classification code:741.1 Light/Optics - 812.3 Glass

Database:Compendex

Accession number:20135217123256

Title:A novel compensation fiber coil for eliminating Sagnac Effect in fiber optic current sensor

Authors:Wang, Yingli (1); Kang, Menghua (1); Ren, Liyong (1); Ren, Kaili (1); Xu, Jintao (1); Shi, Nianbao (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing, 100049, China; (3) Xi'An Sino Huaxin Measurement and Control Co., Ltd, China

Source title:Chinese Control Conference, CCC

Abbreviated source title:Chinese Control Conf., CCC

Monograph title:Proceedings of the 32nd Chinese Control Conference, CCC 2013

Issue date:October 18, 2013

Publication year:2013

Pages:7473-7476

Article number:6640753

Language:English

ISSN:19341768

E-ISSN:21612927

ISBN-13:9789881563835

Document type:Conference article (CA)

Conference name:32nd Chinese Control Conference, CCC 2013

Conference date:July 26, 2013 - July 28, 2013

Conference location:Xi'an, China

Conference code:103692

Publisher:IEEE Computer Society, 2001 L Street N.W., Suite 700, Washington, DC 20036-4928, United States

Abstract:In Sagnac interferometer fiber optics current sensor, errors from the residual linear birefringence and environmental temperature and vibration sensitity has severely influenced on accuracy of this sensor. Spun highly linearly birefringent fiber has intrinsic sensitivity to magnetic fields through the Faraday Effect which result in simplification of optical element. The absence of the quarter wave plate result in good temperature performance and reducing light loss for less splice points. In this manuscript, the spun highly linearly birefringent fiber was designed and the vibration insensitive Sagnac interferometer fiber optics current sensor (S-FOCS) scheme was set up. In this scheme, the compensation fiber coil was designed to compensate the error caused by Sagnac effect in sensing fiber coil. Therefore, it is vibration immunity Sagnac interferometer fiber optics current sensor. The theoretical modeling of the state of light polarization was built by Jones Matrix. The results demonstrated that this novel sensor have good performance of conductor position insensitivity, temperature stability and vibration immunity. © 2013 TCCT, CAA.

Number of references:17

Main heading:Fibers

Controlled terms:Fiber optic sensors - Fiber optics - Light polarization - Sensors - Spinning (fibers)

Uncontrolled terms:Fiber coil - Fiber-optic current sensor - Jones matrix - Sagnac effect - Spun fiber

Classification code:741.1 Light/Optics - 741.1.2 Fiber Optics - 801 Chemistry - 812 Ceramics, Refractories and Glass - 817 Plastics and Other Polymers: Products and Applications - 819.3 Fiber Chemistry and Processing

Database:Compendex

Accession number:20134917058257

Title:Suppression of the fluctuation effect in terahertz imaging using homomorphic filtering

Authors:Xu, Limin (1); Fan, Wenhui (1); Liu, Jia (1)

Corresponding author:Fan, W.(fanwh@opt.ac.cn)

Source title:Chinese Optics Letters

Abbreviated source title:Chin. Opt. Lett.

Volume:11

Issue:8

Issue date:August 2013

Publication year:2013

Article number:081201

Language:English

ISSN:16717694

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:To suppress the fluctuation effect due to laser power instability and terahertz radiation fluctuation, a homomorphic filtering method is proposed to process the terahertz images obtained from a pulsed terahertz raster scanning imaging system. The physical model of homomorphic filtering for terahertz imaging is established. The mathematical expressions are given with the specific physical meaning in accordance with the imaging principle. To demonstrate the effectiveness of the method, a homomorphic filtering experiment based on two raw terahertz images selected from the literature using a continuous-wave (CW) terahertz source is also performed. The effect of the method is compared with those described in the literature, and the advantages of homomorphic filtering are discussed. The pulsed- and CW-terahertz image processing results both show that in addition to suppressing the fluctuation effect, the method can also enhance target imaging. © 2013 Chinese Optics Letters.

Number of references:20

Main heading:Laser optics

Controlled terms:Image processing

Uncontrolled terms:Continuous-wave terahertz sources - Homomorphic filtering - Imaging principle - Mathematical expressions - Physical meanings - Raster scanning - Terahertz imaging - Terahertz radiation

Classification code:741 Light, Optics and Optical Devices - 741.1 Light/Optics

DOI:10.3788/COL201311.081201

Database:Compendex

Accession number:20133416640460

Title:Pedestrian detection in unseen scenes by dynamically updating visual words

Authors:Cao, Xianbin (1); Wang, Li (1); Ning, Bo (2); Yuan, Yuan (3); Yan, Pingkun (3)

Author affiliation:(1) Beihang University, Beijing 100191, China; (2) University of Science and Technology of China, Hefei 230026, China; (3) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China

Corresponding author:Yan, P.(pingkun@ieee.org)

Source title:Neurocomputing

Abbreviated source title:Neurocomputing

Volume:119

Issue date:November 7, 2013

Publication year:2013

Pages:232-242

Language:English

ISSN:09252312

E-ISSN:18728286

CODEN:NRCGEO

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:Adapting trained detectors to unseen scenes is a critical problem in pedestrian detection. The performance of trained detector may drop quickly when scenes vary significantly. Retraining a detector with labeled samples from the new scenes may improve its performance. However, it is difficult to obtain enough labeled samples in real applications. In this paper, a novel bag of visual words based method is proposed to detect pedestrians in unseen scenes by dynamically updating the key words. The proposed method achieves its adaptability by using three strategies covering key word selection, detector invariance, and codebook update: (1) In order to select typical words representing pedestrians, a low dimensional model of visual words is built to describe their distribution and select key words using manifold learning. (2) Matching confidence vector (MCV), a novel visual words measurement is proposed, which aims to generate a uniform input vector for the fixed detector applied to different pedestrian codebooks. (3) When detecting pedestrians under changing road conditions, the key word set will be dynamically adjusted according to the matching frequency of each word to adapt the detector to the new scenes. By employing the above strategies, the proposed method is able to detect pedestrians in different scenes without retraining the detector. Experiments in different scenes showed that our proposed method can achieve better adaptability to various scenes and get better performance than other existing methods in unseen scenes. © 2013 Elsevier B.V.

Number of references:41

Main heading:Detectors

Controlled terms:Computer applications - Neural networks

Uncontrolled terms:Adaptive detectors - Bag-of-visual-words - Better performance - Low-dimensional models - Manifold leaning - Matching confidences - Matching frequency - Pedestrian detection

Classification code:723.4 Artificial Intelligence - 723.5 Computer Applications - 914 Safety Engineering

DOI:10.1016/j.neucom.2013.03.036

Database:Compendex

Accession number:20133316611695

Title:Enhanced luminescence properties of monodisperse trioctylphosphine oxide-capped Nd3+-doped LaF<inf>3</inf> nanorods without OH groups

Authors:Cui, Xiaoxia (1); Guo, Haitao (1); Hou, Chaoqi (1); Gao, Fei (1); Wang, Zhongyue (2); Wei, Wei (1); Peng, Bo (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science (CAS), Xi'an, Shaanxi 710119, China; (2) Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210003, China

Corresponding author:Cui, X.(cuixx@opt.ac.cn)

Source title:Colloids and Surfaces A: Physicochemical and Engineering Aspects

Abbreviated source title:Colloids Surf. A Physicochem. Eng. Asp.

Volume:436

Issue date:September 5, 2013

Publication year:2013

Pages:386-391

Language:English

ISSN:09277757

E-ISSN:18734359

CODEN:CPEAEH

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:Nd3+-doped LaF<inf>3</inf> nanorods without -OH groups were synthesized via a simple thermolysis method in trioctylphosphine oxide (TOPO) solvent. FTIR spectrum indicates that TOPO molecules have been coordinated to LaF<inf>3</inf>:Nd nanorods surface, which reduce the number of -OH groups on the nanoparticles surface effectively. The structure and morphology of as-synthesized nanorods were characterized. The possible grow mechanism of LaF<inf>3</inf>:Nd nanorods has been also discussed in detail. The TOPO capped LaF<inf>3</inf>:Nd nanoparticles preferentially grow along the <0001> orientation under high temperature. Based on the absorption spectra and Judd-Ofelt theory, higher value of emission cross-section for 4F<inf>3/2</inf>&rarr4I<inf>11/2</inf> transition of Nd3+ was calculated to be 3.22×10-20cm2. The strong fluorescence intensity of LaF<inf>3</inf>:Nd nanorods in chloroform demonstrates that these nanorods are promising luminescence materials. © 2013 Elsevier B.V.

Number of references:20

Main heading:Nanorods

Controlled terms:Luminescence - Nanoparticles - Surface treatment

Uncontrolled terms:Emission cross-section - Enhanced luminescence - Fluorescence intensities - Luminescence material - Structure and morphology - Topo - Trioctylphosphine oxide - Trioctylphosphines

Classification code:933 Solid State Physics - 931 Classical Physics; Quantum Theory; Relativity - 802 Chemical Apparatus and Plants; Unit Operations; Unit Processes - 761 Nanotechnology - 741.1 Light/Optics - 708 Electric and Magnetic Materials - 539 Metals Corrosion and Protection; Metal Plating

DOI:10.1016/j.colsurfa.2013.07.009

Database:Compendex

Accession number:20131616216353

Title:Sparse coding from a bayesian perspective

Authors:Lu, Xiaoqiang (1); Wang, Yulong (1); Yuan, Yuan (1)

Author affiliation:(1) Center for Optical Imagery Analysis and Learning (OPTIMAL), Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) Faculty of Mathematics and Computer Science, Hubei University, Wuhan 430062, China

Corresponding author:Lu, X.(luxiaoqiang@opt.ac.cn)

Source title:IEEE Transactions on Neural Networks and Learning Systems

Abbreviated source title:IEEE Trans. Neural Networks Learn. Sys.

Volume:24

Issue:6

Issue date:2013

Publication year:2013

Pages:929-939

Article number:6472078

Language:English

ISSN:2162237X

E-ISSN:21622388

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., 445 Hoes Lane / P.O. Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:Sparse coding is a promising theme in computer vision. Most of the existing sparse coding methods are based on either &ell;<inf>0</inf> or &ell;<inf>1</inf> penalty, which often leads to unstable solution or biased estimation. This is because of the nonconvexity and discontinuity of the &ell;<inf>0</inf> penalty and the over-penalization on the true large coefficients of the &ell;<inf>1</inf> penalty. In this paper, sparse coding is interpreted from a novel Bayesian perspective, which results in a new objective function through maximum a posteriori estimation. The obtained solution of the objective function can generate more stable results than the &ell;<inf>0</inf> penalty and smaller reconstruction errors than the &ell;<inf>1</inf> penalty. In addition, the convergence property of the proposed algorithm for sparse coding is also established. The experiments on applications in single image super-resolution and visual tracking demonstrate that the proposed method is more effective than other state-of-the-art methods. © 2012 IEEE.

Number of references:39

Main heading:Computer networks

Controlled terms:Artificial intelligence - Computer vision

Uncontrolled terms:Bayesian - Compressive sensing - Convergence properties - Maximum a posteriori - Maximum a posteriori estimation - Reconstruction error - Sparse coding - State-of-the-art methods

Classification code:716 Telecommunication; Radar, Radio and Television - 717 Optical Communication - 718 Telephone Systems and Related Technologies; Line Communications - 722 Computer Systems and Equipment - 723 Computer Software, Data Handling and Applications

DOI:10.1109/TNNLS.2013.2245914

Database:Compendex

Accession number:20134016817716

Title:Key technologies research of new generation concentrating photovoltaic

Authors:Liu, Chun Tong (1); Bing, Li (1); Tao, Wang (2); Li, Hong Cai (1)

Author affiliation:(1) High-Tech Institute of Xi'an, Shaanxi, 710025, China; (2) Xi'an institute of optics and precision mechanics of CAS, Shaanxi, 710119, China

Source title:Advanced Materials Research

Abbreviated source title:Adv. Mater. Res.

Volume:724-725

Monograph title:Applied Energy Technology

Issue date:2013

Publication year:2013

Pages:171-175

Language:English

ISSN:10226680

ISBN-13:9783037857410

Document type:Conference article (CA)

Conference name:2013 2nd International Conference on Energy and Environmental Protection, ICEEP 2013

Conference date:April 19, 2013 - April 21, 2013

Conference location:Guilin, China

Conference code:99790

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:The new concentrating photovoltaic (CPV) with core technology of III-V multi-junction cells, can significantly reduce the cost of photovoltaic system, and with advantages of high conversion rate, light weight, small size, energy saving and environmental protection, etc, which was widely regarded as the next-generation of solar photovoltaic technology. On the basis of the introduction of related research process, the paper concentrating discuss on the key technologies such as the new efficient multi-junction cells, high performance non-imaging concentrated light technology and sun tracking system, and propose the appropriate technical solutions, which can provide reference for the application and dissemination of the new generation concentrating photovoltaic. © (2013) Trans Tech Publications, Switzerland.

Number of references:8

Main heading:Technology

Controlled terms:Photovoltaic cells - Solar cells - Solar power generation

Uncontrolled terms:Concentrating photovoltaic - Energy saving and environmental protection - Key technologies - Multi-junction cells - Photovoltaic systems - Solar photovoltaic technology - Sun tracking systems - Technical solutions

Classification code:615.2 Solar Power - 702.3 Solar Cells - 741.3 Optical Devices and Systems - 901 Engineering Profession

DOI:10.4028/www.scientific.net/AMR.724-725.171

Database:Compendex

Accession number:20135117094997

Title:LDFT-based watermarking resilient to local desynchronization attacks

Authors:Tian, Huawei (1); Zhao, Yao (3); Ni, Rongrong (1); Qin, Lunming (1); Li, Xuelong (4)

Author affiliation:(1) Institute of Information Science, Beijing Jiaotong University, Beijing, China; (2) Beijing Key Laboratory of Advanced Information Science and Network Technology, Beijing 100044, China; (3) Institute of Information Science, Beijing Jiaotong University, State Key Laboratory of Rail Traffic Control and Safety, Beijing 100044, China; (4) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Xi'an 710119, Shaanxi, China

Source title:IEEE Transactions on Cybernetics

Abbreviated source title:IEEE Trans. Cybern.

Volume:43

Issue:6

Issue date:December 2013

Publication year:2013

Pages:2190-2201

Article number:6486549

Language:English

ISSN:21682267

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., 445 Hoes Lane / P.O. Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:Up to now, a watermarking scheme that is robust against desynchronization attacks (DAs) is still a grand challenge. Most image watermarking resynchronization schemes in literature can survive individual global DAs (e.g., rotation, scaling, translation, and other affine transforms), but few are resilient to challenging cropping and local DAs. The main reason is that robust features for watermark synchronization are only globally invariable rather than locally invariable. In this paper, we present a blind image watermarking resynchronization scheme against local transform attacks. First, we propose a new feature transform named local daisy feature transform (LDFT), which is not only globally but also locally invariable. Then, the binary space partitioning (BSP) tree is used to partition the geometrically invariant LDFT space. In the BSP tree, the location of each pixel is fixed under global transform, local transform, and cropping. Lastly, the watermarking sequence is embedded bit by bit into each leaf node of the BSP tree by using the logarithmic quantization index modulation watermarking embedding method. Simulation results show that the proposed watermarking scheme can survive numerous kinds of distortions, including common image-processing attacks, local and global DAs, and noninvertible cropping. © 2013 IEEE.

Number of references:46

Main heading:Image watermarking

Controlled terms:Binary trees - Computer crime - Digital watermarking - Forestry - Watermarking

Uncontrolled terms:Binary space partitioning trees - De-synchronization attacks - Feature transform - Quantization index modulation - Robust - Watermark synchronization - Watermarking embedding - Watermarking schemes

Classification code:723 Computer Software, Data Handling and Applications - 723.2 Data Processing and Image Processing - 811.1.1 Papermaking Processes - 821.0 Woodlands and Forestry

DOI:10.1109/TCYB.2013.2245415

Database:Compendex

Accession number:20140317201777

Title:An enhanced infrared and visible image fusion method based on wavelet transform

Authors:Xu, Fan (1); Su, Xiuqin (1)

Author affiliation:(1) Key Laboratory of Ultrafast Photoelectric Diagnostics Technology, Xi'an Institute of Optics and Precision, CAS, Xi'an 710119, China; (2) Univerity of CAS, Beijing, 100049, China

Source title:Proceedings - 2013 5th International Conference on Intelligent Human-Machine Systems and Cybernetics, IHMSC 2013

Abbreviated source title:Proc. - Int. Conf. Intelligent Hum.-Mach. Syst. Cybern., IHMSC

Volume:2

Monograph title:Proceedings - 2013 5th International Conference on Intelligent Human-Machine Systems and Cybernetics, IHMSC 2013

Issue date:2013

Publication year:2013

Pages:453-456

Article number:6642783

Language:English

ISBN-13:9780769550114

Document type:Conference article (CA)

Conference name:2013 5th International Conference on Intelligent Human-Machine Systems and Cybernetics, IHMSC 2013

Conference date:August 26, 2013 - August 27, 2013

Conference location:Hangzhou, Zhejiang, China

Conference code:101433

Publisher:IEEE Computer Society, 2001 L Street N.W., Suite 700, Washington, DC 20036-4928, United States

Abstract:In some researches of infrared(IR) and visible image fusion, the IR images often contribute more useful information. However, the IR sensor is sensitive to the temperature of a scene. Therefore, the IR images have low definition and contain much noise which affects the quality of the fused image. In a decomposed image Based on wavelet transform, the contrast of an image is proportional to the relative variation of the gray scale. And with the scale increasing, at least the mean and variance of impulse noise and Gaussian noise linearly decrease. Thus, a novel image fusion method Based on the wavelet transform is proposed in this paper. Firstly, both the IR image and visible image are decomposed by wavelet transform and their multi-scale sub images are achieved. Then, the contrast of IR image is improved by modifying the modulus of the sub images in scale space and stretching the dynamic scope of smooth sub image at coarser resolution level. Finally, the improved IR images and visible images are fused at different scales and reconstructed to the fused image. Experiments are carried out Based on discrete wavelet transform (DWT) and dual tree complex wavelet transform (DTCWT). The results turn out that the enhanced method is effective compared with the original methods. © 2013 IEEE.

Number of references:7

Main heading:Infrared imaging

Controlled terms:Cybernetics - Discrete wavelet transforms - Gaussian noise (electronic) - Image fusion - Image segmentation - Wavelet transforms

Uncontrolled terms:Coarser resolution - Contrast enhance - Dual tree complex wavelet transform (DT-CWT) - Image fusion methods - Infrared and visible image - Scale increasing - Subimages - Visible image

Classification code:713 Electronic Circuits - 716 Telecommunication; Radar, Radio and Television - 723.2 Data Processing and Image Processing - 723.4 Artificial Intelligence - 746 Imaging Techniques - 921.3 Mathematical Transformations

DOI:10.1109/IHMSC.2013.255

Database:Compendex

Accession number:20141717632973

Title:An adaptive and effective single image dehazing algorithm based on dark channel prior

Authors:Zhu, Qingsong (1); Yang, Shuai (3); Heng, Pheng Ann (4); Li, Xuelong (5)

Author affiliation:(1) Shenzhen Institutes of Advanced Technology, Chinese Advanced of Sciences, Shenzhen, China; (2) Chinese University of Hong Kong, Hong Kong; (3) School of Electronic Engineering, Tsinghua University, Beijing, 100084, China; (4) Department of Computer Science and Engineering, Chinese University of Hong Kong, Ho Sin-Hang Engineering Building, Shatin, N.T., Hong Kong; (5) Centre for OPTical IMagery Analysis and Learning (OPTIMAL), Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, Shanxi, China

Corresponding author:Zhu, Q.(qs.zhu@siat.ac.cn)

Source title:2013 IEEE International Conference on Robotics and Biomimetics, ROBIO 2013

Abbreviated source title:IEEE Int. Conf. Rob. Biomimetics, ROBIO

Monograph title:2013 IEEE International Conference on Robotics and Biomimetics, ROBIO 2013

Issue date:2013

Publication year:2013

Pages:1796-1800

Article number:6739728

Language:English

Document type:Conference article (CA)

Conference name:2013 IEEE International Conference on Robotics and Biomimetics, ROBIO 2013

Conference date:December 12, 2013 - December 14, 2013

Conference location:Shenzhen, China

Conference code:104586

Publisher:IEEE Computer Society

Abstract:In this paper, we describe a novel and effective single image enhancement algorithm for haze image. As we observe that, the contrast and intensity of haze image after using dark channel prior approach will unavoidably tend to be lower than those of the real scene, we proposed a method using histogram specification to make an improvement on image after dark channel prior approach. We make a large number of experiment and find that, if dealing with a haze image with large background area and low contrast, dark channel prior result will become dark, also a general haze image after dark channel occurs different degree of anamorphose. We introduce an adaptive algorithm to repair the different kinds of anamorphose on the hazy image after dark channel prior. The experimental results shows that our method make the dehazing result more close to real scene. © 2013 IEEE.

Number of references:11

Main heading:Demulsification

Controlled terms:Adaptive algorithms - Biomimetics - Image enhancement - Repair - Robotics

Uncontrolled terms:Dark channel priors - Dehazing - Histogram specifications - Low contrast - Single image dehazing - Single images

Classification code:461.9 Biology - 513.1 Petroleum Refining, General - 723 Computer Software, Data Handling and Applications - 731.5 Robotics - 741 Light, Optics and Optical Devices - 913.5 Maintenance - 921 Mathematics

DOI:10.1109/ROBIO.2013.6739728

Database:Compendex

Accession number:20132916505304

Title:A research on navigation star catalog selection algorithm based on SVM

Authors:Liu, Fu Cheng (1); Liu, Zhao Hui (1); Liu, Wen (1); Liang, Dong Sheng (1); Cui, Kai (1); Yuan, Hui (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100039, China

Source title:Advanced Materials Research

Abbreviated source title:Adv. Mater. Res.

Volume:706-708

Monograph title:Mechatronics and Intelligent Materials III

Issue date:2013

Publication year:2013

Pages:613-617

Language:English

ISSN:10226680

ISBN-13:9783037857106

Document type:Conference article (CA)

Conference name:2013 3rd International Conference on Mechatronics and Intelligent Materials, MIM 2013

Conference date:May 18, 2013 - May 19, 2013

Conference location:XiShuangBanNa, China

Conference code:97695

Sponsor:Hong Kong Control Engin. and Inform.; Science Research Assoc. (CEIS); Internat. Frontiers of science and; technol. Research Assoc. (IFST); Integrated Research Center for Green Living Techniques; National Chin-Yi University of Technology

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:A navigation star catalog (NSC) selection algorithm via support vector machine (SVM) is proposed in this paper. The sphere spiral method is utilized to generate the sampling boresight directions by virtue of obtaining the uniform sampling data. Then the theory of regression analysis methods is adopted to extract the NSC, and an evenly distributed and small capacity NSC is obtained. Two criterions, namely a global criterion and a local criterion, are defined as the uniformity criteria to test the performance of the NSC generated. Simulations show that, compared with MFM, magnitude weighted method (MWM) and self-organizing algorithm(S-OA), the Boltzmann entropy (B.e) of SVM selection algorithm (SVM-SA) is the minimum, to 0.00207. Simultaneously, under the conditions such as the same field of view (FOV) and elimination of the hole, both the number of guide stars (NGS) and standard deviation (std) of SVM-SA is the least, respectively 7668 and 2.17. Consequently, the SVM-SA is optimal in terms of the NGS and the uniform distribution, and has also a strong adaptability. © (2013) Trans Tech Publications, Switzerland.

Number of references:7

Main heading:Support vector machines

Controlled terms:Algorithms - Entropy - Intelligent materials - Pattern recognition - Regression analysis - Stars

Uncontrolled terms:Boltzmann entropy - Guide star - Regression analysis methods - Selection algorithm - Self organizing algorithm - Standard deviation - Star pattern recognition - Uniform distribution

Classification code:415 Metals, Plastics, Wood and Other Structural Materials - 641.1 Thermodynamics - 657.2 Extraterrestrial Physics and Stellar Phenomena - 716 Telecommunication; Radar, Radio and Television - 723 Computer Software, Data Handling and Applications - 922.2 Mathematical Statistics

DOI:10.4028/www.scientific.net/AMR.706-708.613

Database:Compendex

Accession number:20132616449039

Title:Experimental study on high eff iciency of Ti: sapphire laser to single-mode fiber coupling

Authors:Liu, Jia (1); Fan, Wenhui (1)

Corresponding author:Fan, W.(fanwh@opt.ac.cn)

Source title:Chinese Optics Letters

Abbreviated source title:Chin. Opt. Lett.

Volume:11

Issue:5

Issue date:May 2013

Publication year:2013

Article number:050605

Language:English

ISSN:16717694

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:We experimentally investigate an optimum scheme of coupling a collimated light from a Ti: sapphire laser source into a standard single-mode fiber (SMF). By adjusting the effective numerical aperture (NA) of coupling lens and eliminating the chromatic aberration, a coupling efficiency of around 70% is finally obtained. This result is close to the maximum value predicted by theoretical simulation. It is well demonstrated that high coupling efficiency between Ti:sapphire laser and SMF can also be obtained by optimizing certain parameters of a coupling lens, without employing any special optical components, or the specific fiber with complex structure. © 2013 Chinese Optics Letters.

Number of references:23

Main heading:Aberrations

Controlled terms:Single mode fibers

Uncontrolled terms:Chromatic aberration - Coupling efficiency - Effective numerical aperture - Experimental studies - Optical components - Single-mode-fiber coupling - Standard single mode fibers - Theoretical simulation

Classification code:741 Light, Optics and Optical Devices - 741.1.2 Fiber Optics

DOI:10.3788/COL201311.050605

Database:Compendex

Accession number:20131916321286

Title:Femtosecond multi-beam interference lithography based on dynamic wavefront engineering

Authors:Zhou, Qiang (1); Yang, Wenzheng (1); He, Fengtao (2); Stoian, Razvan (3); Hui, Rongqing (4); Cheng, Guanghua (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, CAS, Xi'an 710119, Shaanxi, China; (2) School of Electron and Engineering, Xi'An University of Post and Telecommunications, Xi'an 710121, Shaanxi, China; (3) Laboratoire Hubert Curien, UMR 5516 CNRS, Université de Lyon, 42000 Saint Etienne, France; (4) Department of Electrical Engineering and Computer Science, University of Kansas, Lawrence, Kansas 66044, United States

Source title:Optics Express

Abbreviated source title:Opt. Express

Volume:21

Issue:8

Issue date:April 22, 2013

Publication year:2013

Pages:9851-9861

Language:English

E-ISSN:10944087

Document type:Journal article (JA)

Publisher:Optical Society of America, 2010 Massachusetts Ave, NW, Washington, DC, DC 20036-1023, United States

Abstract:A method for precise multi-spot parallel ultrafast laser material structuring is presented based on multi-beam interference generated by dynamic spatial phase engineering. A Spatial Light Modulator (SLM) and digitally programming of phase masks are used to accomplish the function of a multi-facet pyramid lens, so that the laser beam can be spatially modulated to create beam multiplexing and desired two-dimensional (2D) multi-beam interference patterns. Various periodic microstructures on metallic alloy surfaces are fabricated with this technique. A method of preparing extended scale periodic microstructures by loading dynamic time-varying phases is also demonstrated. Scanning electron microscopy (SEM) reveals the period and morphology of the microstructures created using this technique. The asymmetry of interference modes generated from the beams with asymmetric wave vector distributions is equally explored. The flexibility of programming the period of the microstructures is demonstrated. © 2013 Optical Society of America.

Number of references:25

Main heading:Loading

Controlled terms:Light modulators - Microstructure - Scanning electron microscopy - Ultrafast lasers

Uncontrolled terms:Asymmetric waves - Beam multiplexing - Dynamic spatial - Multi-beam interference pattern - Multibeam interferences - Periodic microstructure - Spatial light modulators - Spatially modulated

Classification code:672 Naval Vessels - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 744.1 Lasers, General - 933 Solid State Physics - 951 Materials Science

DOI:10.1364/OE.21.009851

Database:Compendex

Accession number:20132016333246

Title:SIFT on manifold: An intrinsic description

Authors:Zhu, Guokang (1); Wang, Qi (1); Yuan, Yuan (1); Yan, Pingkun (1)

Corresponding author:Yuan, Y.(yuany@opt.ac.cn)

Source title:Neurocomputing

Abbreviated source title:Neurocomputing

Volume:113

Issue date:August 3, 2013

Publication year:2013

Pages:227-233

Language:English

ISSN:09252312

E-ISSN:18728286

CODEN:NRCGEO

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:Scale Invariant Feature Transform is a widely used image descriptor, which is distinctive and robust in real-world applications. However, the high dimensionality of this descriptor causes computational inefficiency when there are a large number of points to be processed. This problem has led to several attempts at developing more compact SIFT-like descriptors, which are suitable for faster matching while still retaining their outstanding performance. This paper focuses on the SIFT descriptor and explore a dimensionality reduction for its local representation. By using the manifold learning algorithm of Locality Preserving Projections, a more effective and efficient descriptor LPP-SIFT can be obtained. A large number of experiments have been carried out to demonstrate the effectiveness of LPP-SIFT. Besides, the practicability of LPP-SIFT is also shown in another set of experiments for image similarity measurement. © 2013 Elsevier B.V.

Number of references:29

Main heading:Experiments

Controlled terms:Computer vision - Learning algorithms

Uncontrolled terms:Descriptors - Dimensionality reduction - High dimensionality - Image Descriptor - Locality preserving projections - Manifold learning - Manifold learning algorithm - Scale invariant feature transforms

Classification code:723 Computer Software, Data Handling and Applications - 723.5 Computer Applications - 901.3 Engineering Research

DOI:10.1016/j.neucom.2013.01.020

Database:Compendex

Accession number:20134817038435

Title:A synthetic aperture telescope based on a pair of gratings

Authors:Ji, Ke (1); Gao, Peng (2); Min, Junwei (2); Guo, Rongli (2); Menke, Neimule (1)

Author affiliation:(1) School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (3) Ordos College, Inner Mongolia University, Ordos 017000, China

Corresponding author:Menke, N.(py_menkenei@imu.edu.cn)

Source title:Journal of Modern Optics

Abbreviated source title:J. Mod. Opt.

Volume:60

Issue:15

Issue date:2013

Publication year:2013

Pages:1229-1233

Language:English

ISSN:09500340

E-ISSN:13623044

CODEN:JMOPEW

Document type:Journal article (JA)

Publisher:Taylor and Francis Ltd., 4 Park Square, Milton Park, Abingdon, Oxfordshire, OX14 4RN, United Kingdom

Abstract:A synthetic aperture is an effective approach to enhancement of the resolution of telescopes. In this paper, a new method to improve the resolution by using a pair of gratings is proposed. It allows collection of parts of the light diffracted from the object which could not previously reach the imaging device. This method improves the resolution and light energy utilization ratio of telescopes without introducing new chromatic aberration. An experiment for resolution testing was carried out and the feasibility and availability of the method were verified. © 2013 Taylor & Francis.

Number of references:16

Main heading:Telescopes

Controlled terms:Aberrations - Energy utilization - Optical resolving power - Synthetic apertures

Uncontrolled terms:Chromatic aberration - Effective approaches - Grating - Imaging device - Light energy

Classification code:525.3 Energy Utilization - 657 Space Physics - 716.2 Radar Systems and Equipment - 741 Light, Optics and Optical Devices - 741.1 Light/Optics

DOI:10.1080/09500340.2013.832428

Database:Compendex

Accession number:20130315915562

Title:Design of a novel LED collimating element based on freeform surface

Authors:Yan, Xing-tao (1); Yang, Jian-feng (1); Xue, Bin (1); Zhang, Guo-qi (3); Bu, Fan (1)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, 710119, China; (2) Graduate School of Chinese Academy of Sciences, Beijing, 100049, China; (3) Xi'an ZKMT Electronic Technology Equipment Co., Ltd, Xi'an, 710119, China

Corresponding author:Yan, X.-T.(xingtao.yan@163.com)

Source title:Optoelectronics Letters

Abbreviated source title:Optoelectron. Lett.

Volume:9

Issue:1

Issue date:2013

Publication year:2013

Pages:9-12

Language:English

ISSN:16731905

Document type:Journal article (JA)

Publisher:Springer Verlag, Tiergartenstrasse 17, Heidelberg, D-69121, Germany

Abstract:A novel element for collimating LED light is designed based on non-imaging optics. It is composed of a refraction lens and a reflector. The upper surface of the lens is freeform and calculated by geometrical optics and iterative process. The lens makes the rays in the range of 0°-45° from the optical axis collimated. The rays in the range of 45°-90° from the optical axis are collimated by the reflector. The inner surface of the reflector is parabolic with its focus located in the LED chip. The designed element is applicable to LED source of any emitting type. For a certain application, the simulation results of the designed element in Tracepro show that it has a very compact structure and good collimating performance. Just investigating the loss in the lens surfaces, this element has high light output efficiency of nearly 99%. Most lighting area radii are no more than 20 mm when the illuminated plane is 5 m away from the LED source. © 2013 Tianjin University of Technology and Springer-Verlag Berlin Heidelberg.

Number of references:13

Main heading:Light emitting diodes

Controlled terms:Geometrical optics - Light - Reflection

Uncontrolled terms:Collimating element - Compact structures - Free-form surface - Freeforms - Inner surfaces - Iterative process - LED chips - LED lights - Lens surface - Light-output efficiency - Non-imaging - Optical axis - TracePro - Upper surface

Classification code:741.1 Light/Optics

DOI:10.1007/s11801-013-2331-0

Database:Compendex

Accession number:20132516432278

Title:A sub-nanosecond narrow-linewidth pulsed laser source with controllable repetition rate

Authors:Niu, L.Q. (1); Gao, C.X. (1); He, H.D. (1); Feng, L. (1); Cao, Z.Y. (1); Sun, C.D. (1); Zhu, S.L. (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Zhu, S.L.(slzhu@opt.ac.cn)

Source title:Laser Physics

Abbreviated source title:Laser Phys.

Volume:23

Issue:7

Issue date:July 2013

Publication year:2013

Article number:075101

Language:English

ISSN:1054660X

E-ISSN:15556611

Document type:Journal article (JA)

Publisher:Institute of Physics Publishing, Temple Circus, Temple Way, Bristol, BS1 6BE, United Kingdom

Abstract:A compact all-fiber sub-nanosecond narrow-linewidth Yb-doped fiber amplifier with a controllable repetition rate has been investigated. Tunable temporal pulses ranging from sub-nanoseconds to 10 ns with repetition rates from 10 kHz to 1 MHz are obtained by controlling the waveform of the injected electrical-pulse signal. Due to the practical requirements of our intended applications, a distributed feedback semiconductor laser with a wavelength of 1064 nm, pulse duration of 802 ps, repetition rate of 500 kHz and average power of 20 μW is used to seed a dual-stage single mode Yb-doped fiber amplifier. The characteristics of the amplified pulses are measured and exhibit a temporal duration of 810 ps with an average power of 31.2 mW. The gain of the amplified pulse is about 32 dB at the maximum output power. A notable feature of the amplifier pulses is that the spectral linewidth can be maintained to less than 0.1 nm during the dual-stage amplifier process. The noise level lies more than 22 dB below the peak value of the amplified spectrum, which represents an excellent signal-to-noise ratio. © 2013 Astro Ltd.

Number of references:23

Main heading:Pulse repetition rate

Controlled terms:Fiber amplifiers - Linewidth - Semiconductor lasers - Ytterbium

Uncontrolled terms:Amplified pulse - Controllable repetition rate - Distributed feedback semiconductor laser - Maximum output power - Practical requirements - Pulsed laser sources - Spectral line width - Temporal durations

Classification code:547.2 Rare Earth Metals - 744 Lasers - 931.3 Atomic and Molecular Physics

DOI:10.1088/1054-660X/23/7/075101

Database:Compendex

Accession number:20132616448420

Title:CFRC outer baffle structure & modal analysis and test of space camera

Authors:Chu, Changbo (1); Chai, Wenyi (1); Zhang, Haosu (1); He, Tianbing (1); Wen, Desheng (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an 710119, China

Corresponding author:Chu, C.(cbchu@opt.ac.cn)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:42

Issue:4

Issue date:April 2013

Publication year:2013

Pages:1033-1037

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:Outer baffle of space camera was designed and manufactured with more complicated shape and multilevel inclined vanes using high strengthened carbon fiber reinforced composite (CFRC) T300. Meanwhile the manufacturing process was introduced briefly. Modal analysis was finished with finite element method (FEM). Fixing the outer baffle on an existing fixture the modal test was finished and the radial modes and shapes were obtained, the test frequency response function map was also presented. Comparing the finite element analysis (FEA) and testing data it is indicated that the error of every mode is less than 2.3% between the FEA model & the fact product. It can be seen that the structure of CFRC outer baffle is reasonable and the FEM is feasible. Used into the kinetic modeling process of the space camera, the FEM could have guidance significance to the design of the whole structure of camera.

Number of references:8

Main heading:Cameras

Controlled terms:Finite element method - Frequency response - Modal analysis

Uncontrolled terms:Carbon fiber reinforced composite - Complicated shape - Kinetic modeling - Manufacturing process - Modal test - Outer baffle - Space cameras - Test frequencies

Classification code:731.1 Control Systems - 742.2 Photographic Equipment - 921 Mathematics - 921.6 Numerical Methods

Database:Compendex

Accession number:20134416937891

Title:Design and implementation of the computer monitoring and management system for the multi-mode combination timer device

Authors:Wu, Peng Fei (1); Li, Jian Xun (1); Wang, Yu Jian (1); Li, Jian Xun (2)

Author affiliation:(1) Xi'an University of Technology, Xi'an 710048, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an 710119, China

Source title:Advanced Materials Research

Abbreviated source title:Adv. Mater. Res.

Volume:760-762

Monograph title:Optoelectronics Engineering and Information Technologies in Industry

Issue date:2013

Publication year:2013

Pages:916-922

Language:English

ISSN:10226680

ISBN-13:9783037857731

Document type:Conference article (CA)

Conference name:2nd International Conference on Opto-Electronics Engineering and Materials Research, OEMR 2013

Conference date:October 19, 2013 - October 20, 2013

Conference location:Zhengzhou, Henan, China

Conference code:100390

Sponsor:Computer Science and Electronic Technology; Trans tech publications inc.; National Cheng Kung University

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:The multi-mode combination timer device can receive the GPS\GLONASS, No.1 BeiDou and loran-C at the same time. Since the multiple external frequency sources are introduced for the system, it is necessary to manage and monitor it. The wavelet decomposition atomic time algorithm is used to weight average the external reference signals in the wavelet domain, and the integrated time scales are obtained. The disciplined clock technology is employed to the time scale for calibrating the clock; the results indicate that the system can achieve fast timing and the complementary advantages of all kinds of resources. © (2013) Trans Tech Publications, Switzerland.

Number of references:7

Main heading:Time measurement

Controlled terms:Clocks - Computer monitors - Electronics engineering - Information technology - Radio navigation - Wavelet decomposition

Uncontrolled terms:Design and implementations - Frequency source - Monitoring and management systems - Multimodes - Reference signals - Time algorithms - Time-scales - Wavelet domain

Classification code:943.3 Special Purpose Instruments - 921.3 Mathematical Transformations - 903 Information Science - 722.2 Computer Peripheral Equipment - 718 Telephone Systems and Related Technologies; Line Communications - 717 Optical Communication - 716.3 Radio Systems and Equipment - 716 Telecommunication; Radar, Radio and Television - 715 Electronic Equipment, General Purpose and Industrial - 714 Electronic Components and Tubes - 713 Electronic Circuits

DOI:10.4028/www.scientific.net/AMR.760-762.916

Database:Compendex

Accession number:20132916506343

Title:Study of multiple quantum beats in atomic wavepackets

Authors:Zhu, Chang Jun (1); Xue, Bing (1); Zhai, Xue Jun (1); He, Jun Fang (2)

Author affiliation:(1) Department of Physics, School of Science, Xi'an Polytechnic University, Xi'an 710048, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Xi'an 710119, China

Source title:Applied Mechanics and Materials

Abbreviated source title:Appl. Mech. Mater.

Volume:325-326

Monograph title:Manufacturing Engineering and Process II

Issue date:2013

Publication year:2013

Pages:119-122

Language:English

ISSN:16609336

E-ISSN:16627482

ISBN-13:9783037857076

Document type:Conference article (CA)

Conference name:2013 2nd International Conference on Manufacturing Engineering and Process, ICMEP 2013

Conference date:April 13, 2013 - April 14, 2013

Conference location:Vancouver, BC, Canada

Conference code:97674

Sponsor:Science and Engineering Institute; University of Ontario Institute of Technology (UOIT), Canada

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:A theoretical model consisting of 5 energy levels in coupled four-wave mixing processes was proposed to analyze the coherent characteristics of atomic wavepackets using perturbative theory. The equations of motions of the density matrix were derived and the third-order density matrix elements were presented. Under the condition that the duration of laser pulses is sufficiently short, the system response was treated as impulse response. Moreover, in the lowest order perturbation theory, the third-order nonlinear polarization was obtained using rotating-wave approximation. The results show that multiple quantum beats are embedded in the coupled four-wave mixing signals, and coherent dynamics of wavepackets can be retrieved from the quantum beat dynamics. © (2013) Trans Tech Publications, Switzerland.

Number of references:6

Main heading:Wave packets

Controlled terms:Equations of motion - Four wave mixing - Impulse response - Industrial engineering

Uncontrolled terms:Coherent dynamics - Density matrix elements - Lowest-order perturbation theories - Nonlinear polarizations - Quantum beat - Rotating wave approximations - System response - Theoretical models

Classification code:408.1 Structural Design, General - 711.1 Electromagnetic Waves in Different Media - 912.1 Industrial Engineering - 931.1 Mechanics - 931.4 Quantum Theory; Quantum Mechanics

Database:Compendex

Accession number:20135017076778

Title:Object or background: Whose call is it in complicated scene classification?

Authors:Mou, Lichao (1); Lu, Xiaoqiang (1); Yuan, Yuan (1)

Author affiliation:(1) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China; (2) Graduate University, Chinese Academy of Science, 19A Yuquanlu, Beijing, 100049, China

Source title:2013 IEEE China Summit and International Conference on Signal and Information Processing, ChinaSIP 2013 - Proceedings

Abbreviated source title:IEEE China Summit Int. Conf. Signal Inf. Process., ChinaSIP - Proc.

Monograph title:2013 IEEE China Summit and International Conference on Signal and Information Processing, ChinaSIP 2013 - Proceedings

Issue date:2013

Publication year:2013

Pages:543-546

Article number:6625399

Language:English

ISBN-13:9781479910434

Document type:Conference article (CA)

Conference name:2013 IEEE China Summit and International Conference on Signal and Information Processing, ChinaSIP 2013

Conference date:July 6, 2013 - July 10, 2013

Conference location:Beijing, China

Conference code:101067

Sponsor:The Institute of Electrical and Electronics Engineers Signal Processing Society (IEEE SPS)

Abstract:Scene semantic parsing is a challenging problem in the field of computer vision. Most approaches exploit low-level features to describe the whole scene. However, there is a large semantic gap between low-level features and high-level scene semantic. In this paper, a scene classification approach is proposed by exploiting semantic objects/materials of the background to reduce the semantic gap. The proposed approach can be divided three steps: First we construct two high-level semantic features (BCFs and BSLFs). Second, we design an approach to learn the prior probability of the Bayesian Networks from these two semantic features of training images. Finally, Bayesian Networks is used to achieve the goal of scene classification. Experimental results show that our approach achieves state-of-the-art performance on the task of scene classification compare with other approaches. © 2013 IEEE.

Number of references:10

Main heading:Image classification

Controlled terms:Bayesian networks - Data processing - Semantics

Uncontrolled terms:Background analysis - High-level semantic features - Low-level features - Scene categorization - Scene classification - scene parsing - Semantic features - State-of-the-art performance

Classification code:716 Telecommunication; Radar, Radio and Television - 723.2 Data Processing and Image Processing - 903.2 Information Dissemination - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory

DOI:10.1109/ChinaSIP.2013.6625399

Database:Compendex

Accession number:20133016530636

Title:Underwater optical imaging technology and its applications

Authors:Zeng, Rong (1); He, Jun Hua (2); Lv, Pei (2)

Author affiliation:(1) Graduate School of Chinese Academic of Sciences, Beijing 100039, China; (2) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an 710119, China

Source title:Advanced Materials Research

Abbreviated source title:Adv. Mater. Res.

Volume:710

Monograph title:Advanced Technologies and Solutions in Industry

Issue date:2013

Publication year:2013

Pages:408-412

Language:English

ISSN:10226680

ISBN-13:9783037857205

Document type:Conference article (CA)

Conference name:2013 International Conference on Advanced Technologies and Solutions in Industry, ICATSI 2013

Conference date:March 22, 2013 - March 23, 2013

Conference location:Taiyuan, Shanxi, China

Conference code:97849

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:The applications of underwater optical imaging technology are reviewed. The main types of underwater laser imaging technology are introduced, such as underwater laser scanning imaging and underwater distance selected imaging. The respective imaging principle and characteristics are presented. Furthermore, the newest imaging technology, such as underwater compressive sensing imaging technology is described in detail. The recent researching status is included. © (2013) Trans Tech Publications, Switzerland.

Number of references:11

Main heading:Underwater imaging

Controlled terms:Laser applications - Optical image storage - Signal reconstruction

Uncontrolled terms:Compressive sensing - Imaging principle - Imaging technology - ITS applications - Laser scanning - Optical imaging technology - Range-gated - Underwater laser imaging

Classification code:472 Ocean Engineering - 716.1 Information Theory and Signal Processing - 741 Light, Optics and Optical Devices - 741.3 Optical Devices and Systems - 744.9 Laser Applications - 746 Imaging Techniques

DOI:10.4028/www.scientific.net/AMR.710.408

Database:Compendex

Accession number:20134216860599

Title:Graphene-based 2 μm Tm3+-doped fiber passively Q-switched laser

Authors:Li, Diao (1); Jiang, Man (1); Qi, Mei (1); Zheng, Xin-Liang (1); Ren, Zhao-Yu (1); Sun, Zhi-Pei (2); Wang, Yi-Shan (3); Bai, Jin-Tao (1)

Author affiliation:(1) Department of Physics, Institute of Photonics and Photon-Technology, Northwest University, Xi'an 710069, China; (2) Department of Engineering, University of Cambridge, Cambridge CB30FA, United Kingdom; (3) State Key Laboratory of Transient Optics and Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Bai, J.-T.(baijt@nwu.edu.cn)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:42

Issue:8

Issue date:August 2013

Publication year:2013

Pages:978-982

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:The output characteristics of graphene-based passively Q-switched pulses at 2 μm wavelengths were reported. On the basis of linear resonant cavity, Tm3+-doped fiber and graphene saturable absorber mirror served as gain medium and passively Q-switched device respectively. Tm3+-doped fiber was end pumped by 792 nm semiconductor laser. Light in the cavity was focused onto graphene membrane through a set of collimation and focusing lens. Passively Q-switched pulses centered at 1 958 nm wavelength were acquired successfully. The minimum pulse width of 1.02 μs was obtained when pump power rise to 3.0 W, and corresponding average output power of 26 mW, repetition rate of 116 kHz, single pulse energy of 224 nJ were obtained respectively. Furthermore, average output power and pulse width presented approximate linear relationship with incident pump power. The experimental results indicate that excellent saturated absorption characteristic of graphene is effective for passively Q-switched pulse operation at 2 μm wavelengths.

Number of references:18

Main heading:Optical pumping

Controlled terms:Fibers - Graphene - Q switched lasers - Q switching - Saturable absorbers

Uncontrolled terms:Graphene saturable absorbers - Linear resonant cavity - Output characteristics - Passively Q-switched - Passively Q-switched lasers - Saturated absorptions - Short pulse - Tm-doped

Classification code:817 Plastics and Other Polymers: Products and Applications - 812 Ceramics, Refractories and Glass - 804 Chemical Products Generally - 761 Nanotechnology - 744.8 Laser Beam Interactions - 744.1 Lasers, General - 741.1 Light/Optics

DOI:10.3788/gzxb20134208.0978

Database:Compendex

Accession number:20140817350390

Title:Research progress of microstructured polymer optical fiber preparation method

Authors:Wang, Jian (1); Wei, Jian-Ping (1); Yang, Bo (4); Zhang, Li-Wei (3); Yang, Xue-Feng (3); Yuan, Xiao-Li (3)

Author affiliation:(1) Key Laboratory of Gas Geology and Gas Control, Henan Polytechnic University, Jiaozuo 454000, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (3) Department of Physics and Chemistry, Henan Polytechnic University, Jiaozuo 454000, China; (4) School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China

Corresponding author:Wang, J.

Source title:Gongneng Cailiao/Journal of Functional Materials

Abbreviated source title:Gongneng Cailiao

Volume:44

Issue:SUPPL.2

Issue date:December 30, 2013

Publication year:2013

Pages:171-175

Language:Chinese

ISSN:10019731

CODEN:GOCAEA

Document type:Journal article (JA)

Publisher:Journal of Functional Materials, P.O. Box 1512, Chongqing, 630700, China

Abstract:Microstructured optical fibers attract extensive attention for their excellent optical properties. As an important part of the microstructure fiber, microstructured polymer optical fibers have been studied in depth by researchers. In this paper, the preparation methods of microstructured polymer fiber preform are reviewed. It mainly introduces the methods such as packing method, drilling holes method, casting method, extrusion method and extrusion-molding method. The advantages and disadvantages of these methods are analyzed and prospected.

Number of references:32

Main heading:Optical fibers

Controlled terms:Antibodies - Extrusion molding - Polymers

Uncontrolled terms:Casting method - Drilling holes - Extrusion method - Micro-structured optical fibers - Microstructure fibers - Microstructured polymer optical fibers - Packing method - Preparation method

Classification code:461.9.1 Immunology - 741.1.2 Fiber Optics - 815.1 Polymeric Materials - 816 Plastics and Other Polymers: Processing and Machinery

Database:Compendex

Accession number:20131516204736

Title:Long-term stable bright amplitude-squeezed state of light at 1064 nm for quantum imaging

Authors:Feng, Fei (1); Bi, Si Wen (1); Lu, Bao Zhu (1); Kang, Meng Hua (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Feng, F.(fengfei@opt.cn)

Source title:Optik

Abbreviated source title:Optik

Volume:124

Issue:11

Issue date:June 2013

Publication year:2013

Pages:1070-1073

Language:English

ISSN:00304026

Document type:Journal article (JA)

Publisher:Urban und Fischer Verlag Jena, P.O. Box 100537, Jena, 07705, Germany

Abstract:Bright amplitude-squeezed light at 1064 nm is generated with excellent long-term stability by utilizing the degenerate optical parametric amplifier (OPA) based on periodically poled KTiOPO<inf>4</inf> (PPKTP) crystal. Amplitude noise reduction of as much as -5.5 dB is observed directly at an output power of 0.3 mW. This corresponds to a squeezing of -6.22 dB in the beam, the detection efficiency and the propagation efficiency are taken into account. The average value of the detected noise reduction in continuous operation over 5 h is -3.8 dB by locking the cavity length of the OPA. The squeezed state light is applied for imaging of virtual object. The experimental results indicate that the obtained image is more distinct and has less distortion compared to that obtained by infrared coherent light. © 2013 Elsevier GmbH. All rights reserved.

Number of references:21

Main heading:Noise abatement

Controlled terms:Homodyne detection - Light amplifiers - Optical parametric amplifiers - Quantum optics - Squeezed light

Uncontrolled terms:Continuous operation - Detection efficiency - Long term stability - Optical parametric amplifiers (OPA) - Periodically poled - Quantum imaging - Self-balanced - Virtual objects

DOI:10.1016/j.ijleo.2013.01.005

Database:Compendex

Accession number:20131916321362

Title:Erratum: Empirical mode decomposition based background removal and de-noising in polarization interference imaging spectrometer (Optics Express (2013) 21:3 (2592-2605))

Authors:Ren, Wenyi (1); Zhang, Chunmin (1); Mu, Tingkui (1); Fu, Lili (1); Jia, Chenling (1)

Author affiliation:(1) School of Science, Xi'An Jiaotong University, Xi'an 710049, China; (2) Non-equilibrium Condensed Matter and Quantum Engineering Laboratory, Key Laboratory, Ministry of Education, Xi'an 710049, China; (3) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science (CAS), Xi'an 710119, China

Source title:Optics Express

Abbreviated source title:Opt. Express

Volume:21

Issue:8

Issue date:April 22, 2013

Publication year:2013

Pages:10207

Language:English

E-ISSN:10944087

Document type:Journal article (JA)

Publisher:Optical Society of America, 2010 Massachusetts Avenue NW, Washington, DC 20036-1023, United States

Number of references:1

DOI:10.1364/OE.21.010207

Database:Compendex

Accession number:20133516678921

Title:Dispersion imaging spectrometer for detecting and locating energetic targets in real time

Authors:Yang, Qinghua (1); Zeng, Xiaodong (1); Zhao, Baochang (2)

Author affiliation:(1) School of Technical Physics, Xidian University, Xi'an 710071, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Yang, Q.(yangqh666@163.com)

Source title:Chinese Optics Letters

Abbreviated source title:Chin. Opt. Lett.

Volume:11

Issue:6

Issue date:June 2013

Publication year:2013

Article number:061202

Language:English

ISSN:16717694

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:A conceptual dispersion imaging spectrometer (DIS) is proposed. It consists of a telescope, four prisms, an imaging lens, and a detector. The first prism allows only the first set of wavelengths along the first direction to pass and disperse. The second prism allows only the second set of wavelengths along the second direction, which is perpendicular to the first. The third and fourth prisms are used to compensate for the angular deviations from the optical axes of the first and second prisms, respectively. The proposed DIS disperses the spectra of a target to form an L-shaped dispersion pattern (LDP). The theoretical calculation and numerical simulation of the LDP are presented. The DIS can locate multiple targets based only on data obtained from a single frame. It is suitable for detecting and locating energetic targets in real time. © 2013 Chinese Optics Letters.

Number of references:25

Main heading:Dispersion (waves)

Controlled terms:Dispersions - Prisms - Spectrometers

Uncontrolled terms:Angular deviations - Dispersion imaging - Dispersion patterns - Imaging lens - Multiple targets - Optical axes - Single frames - Theoretical calculations

Classification code:711.1 Electromagnetic Waves in Different Media - 741.3 Optical Devices and Systems - 951 Materials Science

DOI:10.3788/COL201311.061202

Database:Compendex

Accession number:20130415939973

Title:Prostate segmentation in MR images using discriminant boundary features

Authors:Yang, Meijuan (1); Li, Xuelong (1); Turkbey, Baris (2); Choyke, Peter L. (2); Yan, Pingkun (1)

Author affiliation:(1) Center for OPTical IMagery Analysis and Learning, State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China; (2) National Institutes of Health, National Cancer Institute, Bethesda, MD 20892, United States

Corresponding author:Yan, P.(pingkun@ieee.org)

Source title:IEEE Transactions on Biomedical Engineering

Abbreviated source title:IEEE Trans. Biomed. Eng.

Volume:60

Issue:2

Issue date:2013

Publication year:2013

Pages:479-488

Article number:6359798

Language:English

ISSN:00189294

E-ISSN:15582531

CODEN:IEBEAX

Document type:Journal article (JA)

Publisher:IEEE Computer Society, 2001 L Street N.W., Suite 700, Washington, DC 20036-4928, United States

Abstract:Segmentation of the prostate in magnetic resonance image has become more in need for its assistance to diagnosis and surgical planning of prostate carcinoma. Due to the natural variability of anatomical structures, statistical shape model has been widely applied in medical image segmentation. Robust and distinctive local features are critical for statistical shape model to achieve accurate segmentation results. The scale invariant feature transformation (SIFT) has been employed to capture the information of the local patch surrounding the boundary. However, when SIFT feature being used for segmentation, the scale and variance are not specified with the location of the point of interest. To deal with it, the discriminant analysis in machine learning is introduced to measure the distinctiveness of the learned SIFT features for each landmark directly and to make the scale and variance adaptive to the locations. As the gray values and gradients vary significantly over the boundary of the prostate, separate appearance descriptors are built for each landmark and then optimized. After that, a two stage coarse-to-fine segmentation approach is carried out by incorporating the local shape variations. Finally, the experiments on prostate segmentation from MR image are conducted to verify the efficiency of the proposed algorithms. © 1964-2012 IEEE.

Number of references:21

Main heading:Image segmentation

Controlled terms:Discriminant analysis - Magnetic resonance imaging - Medical image processing - Urology

Uncontrolled terms:Anatomical structures - Coarse-to-fine - Descriptors - Gray value - Image features - Local feature - Local shape - Magnetic resonance images - Medical image segmentation - MR images - Natural variability - Point of interest - Prostate carcinoma - Prostate segmentation - Scale invariant - Segmentation results - SIFT Feature - Statistical shape model - Surgical planning

Classification code:461.6 Medicine and Pharmacology - 723.2 Data Processing and Image Processing - 746 Imaging Techniques - 922 Statistical Methods

DOI:10.1109/TBME.2012.2228644

Database:Compendex

Accession number:20131616207206

Title:A stable polarization switching laser from a bidirectional passively mode-locked thuliumdoped fiber oscillator

Authors:Zhou, Wei (1); Shen, Deyuan (1); Wang, Yishan (1); Ma, Hefeng (1); Wang, Fei (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) School of Science, Xi'an Jiaotong University, Xi'an, 710049, China; (3) Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Zhou, W.(zhouwei@opt.cn)

Source title:Optics Express

Abbreviated source title:Opt. Express

Volume:21

Issue:7

Issue date:April 8, 2013

Publication year:2013

Pages:8945-8952

Language:English

E-ISSN:10944087

Document type:Journal article (JA)

Publisher:Optical Society of America, 2010 Massachusetts Ave, NW, Washington, DC, DC 20036-1023, United States

Abstract:We report on a novel polarization switching laser from a bidirectional passively mode-locked thulium(Tm)-doped fiber oscillator, which was characterized by the periodical change of polarization state of every pulse. The switching laser was created by combing two orthogonally stable vector solitons, which were found to be wave-breaking-free pulses in the all-anomalous- dispersion regime. The measured repetition rates of switching laser and the corresponding vector solitons were 49.596 MHz, 24.798 MHz, and 24.798MHz. By controlling wave plates, either of the polarized pulse trains can be switched on or off. To our knowledge, this is the first report of polarization switching laser with vector solitons in Tm fiber oscillators. © 2013 Optical Society of America.

Number of references:26

Main heading:Solitons

Controlled terms:Optical switches - Passive mode locking

Uncontrolled terms:Controlling waves - Doped fiber - Passively mode-locked - Polarization state - Polarization switching - Repetition rate - Thulium-doped fibers - Vector soliton

Classification code:741.3 Optical Devices and Systems - 744.1 Lasers, General - 931.3 Atomic and Molecular Physics

DOI:10.1364/OE.21.008945

Database:Compendex

Accession number:IP52877255

Title:Dayside aurora classification via BIFs-based sparse representation using manifold learning

Authors:Han, Bing (1); Zhao, Xiaojing (1); Tao, Dacheng (3); Li, Xuelong (4); Hu, Zejun (5); Hu, Hongqiao (5)

Author affiliation:(1) VIPS Lab, School of Electronic Engineering, Xidian University, Xi'an 710071, China; (2) Key Laboratory of Intelligent Perception and Image Understanding of Ministry of Education of China, Xidian University, Xi'an 710071, China; (3) Engineering and Information Technology, University of Technology Sydney, Sydney, NSW y2007, Australia; (4) Center for Optical Imagery Analysis and Learning, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an 710119, China; (5) SOA Key Laboratory for Polar Science, Polar Research Institute of China, Shanghai 200136, China

Corresponding author:Han, B.(bhan@xidian.edu.cn)

Source title:International Journal of Computer Mathematics

Abbreviated source title:Int J Comput Math

Issue date:2013

Publication year:2013

Language:English

ISSN:00207160

E-ISSN:10290265

CODEN:IJCMAT

Document type:Article in Press

Abstract:Aurora is the typical ionosphere track generated by the interaction of solar wind and magnetosphere, whose modality and variation are significant to the study of space weather activity. A new aurora classification algorithm based on biologically inspired features (BIFs) and discriminative locality alignment (DLA) is proposed in this paper. First, an aurora image is represented by the BIFs, which combines the C1 units from the hierarchical model of object recognition in cortex and the gist features from the saliency map; then, the manifold learning method called DLA is used to obtain the effective sparse representation for auroras based on BIFs; finally, classification results using support vector machine and nearest neighbour with three sets of features: the C1 unit features, the gist features and the BIFs illustrate the effectiveness and robustness of our method on the real aurora image database from Chinese Arctic Yellow River Station. © 2013 © 2013 Taylor & Francis.

Number of references:31

Main heading:Image retrieval

Controlled terms:Hierarchical systems - Ionosphere - Magnetosphere - Object recognition

Uncontrolled terms:Biologically inspired - Classification algorithm - Classification results - Hierarchical model - Manifold learning - Nearest neighbour - Sets of features - Sparse representation

Classification code:443.1 Atmospheric Properties - 711.1 Electromagnetic Waves in Different Media - 716 Telecommunication; Radar, Radio and Television - 741 Light, Optics and Optical Devices - 961 Systems Science

DOI:10.1080/00207160.2013.831084

Database:Compendex

Accession number:20132816483962

Title:Auto-exposure algorithm for scenes with high dynamic range based on image entropy

Authors:Yang, Zuo-Ting (1); Ruan, Ping (1); Zhai, Bo (1)

Corresponding author:Ruan, P.(ruanp@opt.ac.cn)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:42

Issue:6

Issue date:June 2013

Publication year:2013

Pages:742-746

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:Automatic exposure control is a process of optimizing image brightness by controlling the exposure. To achieve auto exposure in digital cameras, image brightness is widely used because of its direct relationship with exposure value. Although entropy has been used in various image processing applications, it has not been used for AE application. A new auto-exposure algorithm was proposed based on the image entropy. The proposed method calculated the entropy of captured images to estimate lighting conditions. By comparing the image entropy and entropy threshold, the images were divided into the regions of interest and regions of no interest. After that, assign different weights to the regions of interest and regions of no interest, so that the overall brightness level was made to carry more information of the regions of interest. At last, the image can get accurate automatic exposure. The algorithm is mainly based on the image entropy, so the exposures are not affected by the location of objects in the image. It can make the algorithm more flexible. The experiment results show that the algorithm can accurately detect high-contrast lighting conditions and improve the dynamic range of output images for a camera system, at the same time the algorithm can also increases the accuracy of auto exposure.

Number of references:13

Main heading:Luminance

Controlled terms:Algorithms - Exposure controls - Image processing - Lighting

Uncontrolled terms:Exposure value - High dynamic range - Image brightness - Image entropy - Image processing applications - Lighting conditions - Regions of interest - Weight

Classification code:707 Illuminating Engineering - 723 Computer Software, Data Handling and Applications - 741 Light, Optics and Optical Devices - 741.1 Light/Optics - 742.1 Photography - 921 Mathematics

DOI:10.3788/gzxb20134206.0742

Database:Compendex

Accession number:20134316878004

Title:Effect of turbulence on visibility and signal-to-noise ratio of lensless ghost imaging with thermal light

Authors:Yao, Yin-Ping (1); Wan, Ren-Gang (1); Zhang, Shi-Wei (1); Zhang, Tong-Yi (1)

Corresponding author:Zhang, T.-Y.(tyzhang@opt.ac.cn)

Source title:Optik

Abbreviated source title:Optik

Volume:124

Issue:24

Issue date:December 2013

Publication year:2013

Pages:6973-6977

Language:English

ISSN:00304026

Document type:Journal article (JA)

Publisher:Urban und Fischer Verlag Jena, P.O. Box 100537, Jena, 07705, Germany

Abstract:Lensless ghost imaging with thermal light through turbulent atmosphere is investigated. Based on the extended Huygens-Fresnel integral and the classical optical coherence theory, we derive the expressions for the visibility and signal-to-noise ratio (SNR) of lensless ghost imaging through turbulence. To show the effect of turbulence on the quality of lensless ghost imaging, we numerically calculate the visibility and SNR for different propagation distances and various turbulence strengths. Though turbulence degrades the image quality, specific visibility and SNR can be obtained for ghost imaging in certain propagation distances. © 2013 Elsevier GmbH. All rights reserved.

Number of references:28

Main heading:Signal to noise ratio

Controlled terms:Imaging techniques - Turbulence - Visibility

Uncontrolled terms:Extended Huygens-Fresnel integrals - Ghost imaging - Propagation distances - Signal-noise-rote ratio (SNR) - Signaltonoise ratio (SNR) - Thermal light - Turbulence strength - Turbulent atmosphere

Classification code:443.1 Atmospheric Properties - 716.1 Information Theory and Signal Processing - 741 Light, Optics and Optical Devices - 741.2 Vision - 746 Imaging Techniques

DOI:10.1016/j.ijleo.2013.05.184

Database:Compendex

Accession number:20134316893779

Title:Terahertz spectroscopy of DNA nucleobases: Cytosine and thymine

Authors:Yan, Hui (1); Fan, Wen-Hui (1); Zheng, Zhuan-Ping (1); Liu, Jia (1)

Corresponding author:Fan, W.-H.(fanwh@opt.ac.cn)

Source title:Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis

Abbreviated source title:Guang Pu Xue Yu Guang Pu Fen Xi

Volume:33

Issue:10

Issue date:October 2013

Publication year:2013

Pages:2612-2616

Language:Chinese

ISSN:10000593

CODEN:GYGFED

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:The absorption features of DNA nucleobases cytosine and thymine were measured by terahertz time-domain spectroscopy (THz-TDS) from 0.1 to 3.5 THz. Our experimental results clearly show that these important biomolecules exhibit distinctive absorption features in THz region. To the best of our knowledge, the subtle absorption peak of cytosine at 2.53 THz is reported for the first time. Moreover, geometry optimizations and lattice dynamic calculations on cytosine crystal were also performed with the pseudo-potential plane wave method of density functional theory by taking periodic boundary conditions into account. All measured terahertz absorption features of cytosine were assigned successfully and its absorption spectrum was reproduced according to our calculations. Furthermore, our results show that absorption features of cytosine below 3.5 THz arise from external modes in translation and rotation motions, which are dominated by the intermolecular hydrogen bonds.

Number of references:14

Main heading:Biomolecules

Controlled terms:Absorption spectroscopy - Frequency bands - Hydrogen bonds - Laser pulses - Terahertz spectroscopy

Uncontrolled terms:Cytosine - Geometry optimization - Intermolecular hydrogen bonds - Periodic boundary conditions - Terahertz time domain spectroscopy - Theoretical calculations - Thymine - THz-TDS

Classification code:716.4 Television Systems and Equipment - 741 Light, Optics and Optical Devices - 744.1 Lasers, General - 801 Chemistry - 931.1 Mechanics

DOI:10.3964/j.issn.1000-0593(2013)10-2612-05

Database:Compendex

Accession number:20134516950204

Title:Passive Q-switching in a diode-side-pumped Nd:YAG laser at 1.319 μ m

Authors:Yan, Shilian (1); Zhang, Ling (1); Yu, Haijuan (1); Li, Menglong (1); Sun, Wei (1); Hou, Wei (1); Lin, Xuechun (1); Wang, Yonggang (2); Wang, Yishan (2)

Author affiliation:(1) Chinese Academy of Sciences, Institute of Semiconductors, Laboratory of All-Solid-State Light Sources, Beijing 100083, China; (2) Chinese Academy of Sciences, Xi'An Institute of Optics and Precision Mechanics, State Key Laboratory of Transient Optics and Photonics, Xi'an 710119, China

Source title:Optical Engineering

Abbreviated source title:Opt Eng

Volume:52

Issue:10

Issue date:2013

Publication year:2013

Article number:106107

Language:English

ISSN:00913286

E-ISSN:15602303

CODEN:OPEGAR

Document type:Journal article (JA)

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:We demonstrated a passively Q-switched Nd:YAG laser operating at 1.319 μm using a transmission-type single-wall carbon nanotube (SWCNT) as the saturable absorber. This is the first report on using SWCNT as a Q-switcher for 1.319 μm Nd:YAG laser in a side-pumped configuration. A maximum output power of 780 mW was obtained with 1.15-μs pulse duration and 42.7-kHz repetition rate. © 2013 Society of Photo-Optical Instrumentation Engineers.

Number of references:35

Main heading:Neodymium lasers

Controlled terms:Carbon nanotubes - Q switching - Saturable absorbers

Uncontrolled terms:Diode-side-pumped - Maximum output power - Passive Q-switching - Passively Q-switched - Pulse durations - Q-switched - Repetition rate - Side-pumped

Classification code:744 Lasers - 761 Nanotechnology

DOI:10.1117/1.OE.52.10.106107

Database:Compendex

Accession number:20140317203849

Title:A new reduction technique for thermospheric wind and temperature measurement with Fabry-Perot interferometer

Authors:Wang, Hong (1); Liu, Xuebin (1); Feng, Yutao (1); Bai, Qinglan (1)

Author affiliation:(1) Xi'an Institute of Optics Precision Mechanic of Chinese Academy of Sciences, Xi'an, Shaanxi 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Wang, H.(wosky619@sina.com)

Source title:Guangxue Xuebao/Acta Optica Sinica

Abbreviated source title:Guangxue Xuebao

Volume:33

Issue:11

Issue date:November 2013

Publication year:2013

Article number:1130003

Language:Chinese

ISSN:02532239

CODEN:GUXUDC

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:The principle of measuring thermospheric wind and temperature by Fabry-Perot interferometer (FPI) is elaborated, the transfer function of FPI and the analytical response expression to the incident line is studied. Referring to the basic principle of traditional wind and temperature retrieval method with FPI, a new matrix reduction technique is proposed. This technique is based on the decompose and approximate mathematics to obtain the matrix form of analytical response expression, then a least-squares technique is employed to get the thermospheric wind and temperature. Simulation results show that when the guessed wind is less than 150 m/s and the guessed temperature is less than 80 K, the error range is ±3 m/s for wind and ±10 K for temperature. The matrix technique not only retains the accuracy of a full Fourier Series Representation method, but also avoids instrument calibration and wavelength translation, which makes it simple and fast.

Number of references:16

Main heading:Temperature measurement

Controlled terms:Atmospheric optics - Calibration - Fabry-Perot interferometers - Fourier series

Uncontrolled terms:Instrument calibrations - Least-squares techniques - Matrix reduction - Reduction techniques - Series representations - Systematic response expression - Temperature retrieval - Thermospheric winds

Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 944.6 Temperature Measurements - 941.3 Optical Instruments - 921.3 Mathematical Transformations - 741.1 Light/Optics - 941 Acoustical and Optical Measuring Instruments

DOI:10.3788/AOS201333.1130003

Database:Compendex

Accession number:20132516429446

Title:Intersubband optical absorption of semiconductor quantum wells driven by in-plane terahertz field

Authors:Zhu, Haiyan (1); Luo, Wenfeng (1); Li, Xiaoli (1); Zhang, Tongyi (2)

Author affiliation:(1) School of Electronic Engineering, Xi'an University of Posts and Telecommunications, Xi'an 710121, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Zhu, H.(haiyanvvv@xupt.edu.cn)

Source title:Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams

Abbreviated source title:Qiangjiguang Yu Lizishu

Volume:25

Issue:6

Issue date:June 2013

Publication year:2013

Pages:1460-1464

Language:English

ISSN:10014322

CODEN:QYLIEL

Document type:Journal article (JA)

Publisher:Editorial Office of High Power Laser and Particle Beams, P.O. Box 919-805, Mianyang, 621900, China

Abstract:The intersubband optical absorption of a semiconductor quantum well driven by an in-plane terahertz electric field is investigated theoretically by employing the extended semiconductor Bloch equations. Our results show that in-plane polarized terahertz fields induce a variety of behavior in the absorption spectra, including terahertz replicas of the main absorption peak and the dynamical Franz-Keldysh effect. The dependence of the absorption of the probe field on frequency and phase of the terahertz field is also very remarkable.

Number of references:16

Main heading:Semiconductor quantum wells

Controlled terms:Electric fields - Light absorption

Uncontrolled terms:Absorption peaks - Dynamical franz-keldysh effects - Intersubband optical absorptions - Intersubband transitions - Probe field - Semiconductor Bloch equations - Tera Hertz - Terahertz fields

Classification code:701.1 Electricity: Basic Concepts and Phenomena - 714.2 Semiconductor Devices and Integrated Circuits - 741.1 Light/Optics

DOI:10.3788/HPLPB20132506.1460

Database:Compendex

Accession number:20134216867588

Title:Low repetition rate subnanosecond pulse laser generation from a diode pumped Nd:Lu<inf>3</inf>Al<inf>5</inf>O<inf>12</inf> laser with electro-optic modulator and transmission semiconductor saturable absorber

Authors:Chang, L. (1); Zhao, S.Z. (1); Yang, K.J. (1); Zhao, J. (1); Zheng, L.H. (2); Xu, X.D. (2); Di, J.Q. (2); Xu, J. (2); Wang, Y.G. (3)

Author affiliation:(1) School of Information Science and Engineering, Shandong University, Jinan, Shandong 250100, China; (2) Key Laboratory of Transparent and Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 215 Chengbei Road, Shanghai 201800, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Zhao, S.Z.(shengzhi_zhao@sdu.edu.cn)

Source title:Journal of the Optical Society of America B: Optical Physics

Abbreviated source title:J Opt Soc Am B

Volume:30

Issue:10

Issue date:October 1, 2013

Publication year:2013

Pages:2710-2714

Language:English

ISSN:07403224

CODEN:JOBPDE

Document type:Journal article (JA)

Publisher:Optical Society of America, 2010 Massachusetts Ave, NW, Washington, DC, DC 20036-1023, United States

Abstract:By using the dual-loss modulated technology, i.e., adopting the electro-optic (EO) modulator and transmission semiconductor saturable absorber (transmission SSA) simultaneously, a diode-pumped doubly Q-switched and mode-locked (QML) Nd:Lu3Al5O12 (Nd:LuAG) laser at 1.06 μm has been realized for the first time. In comparison to the singly passively QML Nd:LuAG laser with transmission SSA, the doubly QML laser can generate more stable pulses with shorter pulse widths and higher peak powers. It can also be observed that the pulse duration of the Q-switched envelope decreases with increasing pump power. When the pump power exceeds 6.52 W for the first time, there is only one mode-locked pulse underneath a Q-switched envelope for this doubly QML Nd:LuAG laser. As a result, the subnanosecond pulse laser with 1 kHz repetition rate of EO and high stability canbe generated. The shortest pulse duration generated is about 718 ps and the highest peak power reaches as high as 502 kW. The experimental results show that Nd:LuAGis an excellent alternative crystal for diode-pumped QML pulsed laser generation. © 2013 Optical Society of America.

Number of references:23

Main heading:Laser power transmission

Controlled terms:Locks (fasteners) - Mode-locked fiber lasers - Modulators - Optical pumping - Pulse generators - Q switching - Saturable absorbers - Semiconductor lasers

Uncontrolled terms:Doubly qml lasers - Electro-optic modulators - Laser generation - Low repetition rate - Mode-locked pulse - Q-switched envelopes - Semiconductor saturable absorbers - Sub-nanosecond pulse

Classification code:601.3 Mechanisms - 713.3 Modulators, Demodulators, Limiters, Discriminators, Mixers - 713.4 Pulse Circuits - 741.1 Light/Optics - 744 Lasers

DOI:10.1364/JOSAB.30.002710

Database:Compendex

Accession number:20130215877006

Title:Localized surface waves at the interfzace between a linear dielectric and a photovoltaic-photorefractive crystal

Authors:Li, Kehao (1); Lu, Keqing (1); Zhang, Yiqi (2); Niu, Pingjuan (3); Yu, Liyuan (3); Zhang, Yanpeng (4)

Author affiliation:(1) State Key Laboratory of Transient Optics, Photonics xi'An Institute of Optics and Precision Mechanics, Chinese Academic of Sciences, Xi'an 710119, China; (2) Key Laboratory for Physical Electronics and Devices, Ministry of Education, Xi'An Jiaotong University, Xi'an 710049, China; (3) School of Electronics and Information Engineering, Tianjin Polytechnic University, Tianjin 300160, China; (4) Graduate University of Chinese Academic of Sciences, Beijing 100049, China

Corresponding author:Lu, K.(kqlutj@126.com)

Source title:Optics and Laser Technology

Abbreviated source title:Opt Laser Technol

Volume:48

Issue date:2013

Publication year:2013

Pages:79-82

Language:English

ISSN:00303992

CODEN:OLTCAS

Document type:Journal article (JA)

Publisher:Elsevier Ltd, Langford Lane, Kidlington, Oxford, OX5 1GB, United Kingdom

Abstract:We study localized surface waves at the interface between a linear dielectric and a photovoltaic-photorefractive (PP) crystal. These localized surface waves can be established provided that 0>δ-b>-α/2, where δ is the guiding parameter, b is the propagation constant, and α is the parameter related to the wavelength and the PP crystal. We show that when δ>0, the part of the energy concentrated in the PP crystal is always higher than that in the linear dielectric and that when δ<0, the part of the energy concentrated in the linear dielectric decreases with an increase in b. We find that the part of the energy concentrated in the linear dielectric for δ<0 is bigger than that for δ>0. Crown Copyright © 2012 Published by Elsevier Ltd. All rights reserved.

Number of references:22

Main heading:Surface waves

Controlled terms:Nonlinear optics - Photoreactivity - Photorefractive crystals

Uncontrolled terms:Linear dielectric - Photorefractive nonlinearity - Propagation constant

Classification code:711 Electromagnetic Waves - 741.1 Light/Optics - 741.1.1 Nonlinear Optics - 751 Acoustics, Noise. Sound - 931 Classical Physics; Quantum Theory; Relativity

DOI:10.1016/j.optlastec.2012.09.021

Database:Compendex

Accession number:20133816763222

Title:Column fixed pattern noise correction of the CMOS image sensor based on estimation method

Authors:Wang, Hua (1); Cao, Jianzhong (1); Wang, Huawei (1); Guo, Huinan (1); Zhao, Xiaodong (1); Liu, Guangsen (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Wang, H.(s09065@opt.cn)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:42

Issue:7

Issue date:July 2013

Publication year:2013

Pages:1928-1932

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:The column fixed pattern noise (CFPN) of the CMOS image sensors have severe influence on image quality. A column fixed pattern noise correction method for CMOS image sensors was proposed based on the analysis of emerge mechanism, noise characteristic and the behavior in the output image of the fixed pattern noise. It sampled the uniform and parallel light source which radiated from a integrating sphere more times use a CMOS image acquiring system and then estimated the column fixed pattern noise using these images. Then, the estimation result was used to correct the column fixed pattern noise in the CMOS image acquisition system. Experimental results show that with this method, the fixed pattern noise can be effectively reduced and the quality of the image can be increased.

Number of references:9

Main heading:Digital cameras

Controlled terms:CMOS integrated circuits - Estimation - Light sources - Pixels

Uncontrolled terms:CMOS image sensor - Estimation methods - Estimation results - Fixed pattern noise - Image acquisition systems - Integrating spheres - Noise characteristic - Nonuniformity

Classification code:714.2 Semiconductor Devices and Integrated Circuits - 742.2 Photographic Equipment - 921 Mathematics

Database:Compendex

Accession number:20130515973985

Title:Simulation of the space turntable angular velocity measurement

Authors:Cui, Kai (1); Liu, Zhaohui (2); Li, Zhiguo (2); Yuan, Hui (1); Liang, Dongsheng (1)

Author affiliation:(1) Graduate University of Chinese Academy of Science, Beijing100049, China; (2) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an710119, China

Corresponding author:Cui, K.(cuik87@163.com)

Source title:Applied Mechanics and Materials

Abbreviated source title:Appl. Mech. Mater.

Volume:246-247

Monograph title:Computer-Aided Design, Manufacturing, Modeling and Simulation II

Issue date:2013

Publication year:2013

Pages:257-261

Language:English

ISSN:16609336

E-ISSN:16627482

ISBN-13:9783037855409

Document type:Conference article (CA)

Conference name:2nd International Conference on Computer-Aided Design, Manufacturing, Modeling and Simulation, CDMMS 2012

Conference date:September 21, 2012 - September 23, 2012

Conference location:Chongqing, China

Conference code:95107

Sponsor:National Natural Science Foundation of China (NSFC)

Publisher:Trans Tech Publications, P.O. Box 1254, Clausthal-Zellerfeld, D-38670, Germany

Abstract:For better design and control of the space turntable, a model for measuring its angular velocity was built. The model utilized a two-axis space turntable to perform the simulation basing on the coordinate conversion theory. The measuring simulation went on with the help of MATLAB software using different carrier attitude angles. It shows the maximal error in the sub astral point longitude and/or latitude is 0.00785 degrees when comparing with the STK results, certifying the validity of the models. The satellite attitude angles have influence on the angular velocity, the maximal azimuth angular velocity is 3.784 deg per sec, yet the elevation's is 0.6945 deg per sec when the attitude angles are all 20 degrees. This simulation process provides some guidance for designing, controlling and calibrating the space turntable. © (2013) Trans Tech Publications, Switzerland.

Number of references:11

Main heading:Computer simulation

Controlled terms:Angular velocity - Computer aided design - Computer software - Earth (planet) - Manufacture - MATLAB - Navigation - Velocity measurement

Uncontrolled terms:Attitude angle - Coordinate conversion - Design and control - Matlab- software - Maximal error - Satellite attitude - Simulation process - Two-axis

Classification code:943.3 Special Purpose Instruments - 931.1 Mechanics - 723.5 Computer Applications - 723 Computer Software, Data Handling and Applications - 716.3 Radio Systems and Equipment - 657 Space Physics - 537.1 Heat Treatment Processes

DOI:10.4028/www.scientific.net/AMM.246-247.257

Database:Compendex

Accession number:20133816764219

Title:Multiple frequency bands of square split resonant rings and metal wire metamaterial

Authors:Gao, Peng (1); Zhang, Chunmin (1); Ai, Jingjing (1); Kang, Yongqiang (1); Li, Gang (1)

Author affiliation:(1) School of Science, Xi'an Jiaotong University, Xi'an 710049, China; (2) Non-equilibrium Condensed Matter and Quantum Engineering Laboratory, Key Laboratory of the Ministry of Education, Xi'an 710049, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an 710119, China

Source title:Applied Optics

Abbreviated source title:Appl. Opt.

Volume:52

Issue:25

Issue date:September 1, 2013

Publication year:2013

Pages:6309-6315

Language:English

ISSN:1559128X

E-ISSN:15394522

CODEN:APOPAI

Document type:Journal article (JA)

Publisher:Optical Society of American (OSA)

Abstract:This work presents experimental measurements of two square split resonant ring and metal wire (SSRR-MW) samples with different cell sizes at microwave frequencies. The geometrical sizes of the metamaterial cells are found to play an important role in the resonant frequency. Cells with different geometrical sizes are chosen to stack into a two-layer or three-layer metamaterial unit to realize the multiple negative passbands. The effective parameters of three separate SSRR-MW models (a one-layer unit, a two-layer unit, and a three-layer unit) are retrieved from the simulation data. The composed models exhibit two or three negative bands by overlapping the passbands of original cells and broadening the overall bandwidth. The recovered parameters show good agreement with the theoretical analysis. © 2013 Optical Society of America.

Number of references:17

Main heading:Cytology

Controlled terms:Cells - Computer simulation - Frequency bands - Metamaterials - Natural frequencies - Wire

Uncontrolled terms:Cell size - Effective parameters - Geometrical sizes - Measurements of - Metal wires - Multiple frequency - Simulation data - Three-layer

Classification code:461.2 Biological Materials and Tissue Engineering - 535.2 Metal Forming - 711.1 Electromagnetic Waves in Different Media - 716.4 Television Systems and Equipment - 723.5 Computer Applications - 951 Materials Science

DOI:10.1364/AO.52.006309

Database:Compendex

Accession number:20141317510109

Title:Design of lens-hood in the space fisheye optical system

Authors:Zhu, Qing (1); Zhang, Zhao-Hui (1); Zhang, Zhi (1); Yan, Aqi (1); Cao, Jian-Zhong (1); Zhang, Kai-Sheng (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an 710119, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8907

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications

Issue date:2013

Publication year:2013

Article number:89071A

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497765

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:Due to the extra wide field of view, fisheye optical systems are appropriately applied in space camera for scouting large-scale objects with near-distance. At the same time, because of the violent sunlight linger within the field of view more than other optical system and more stray light occur during the period, to design proper lens-hood can effectively reduce the sunshine time. Another distinct characteristic of fisheye optical system is the first protrude lens, which is contrived with negative focus to trace the ray with angle about even above 90 degree of incidence. Consequently, the first lens is in danger of damaging by scratching when operating the camera during the ground experiments without lens-hood. Whereas on account of the huge distortion which is the third mainly characteristic of fisheye optical system, to design appropriate lens-hood is a tough work comparing with other low-distortion optical system, especially for those whose half diagonal field is more than 90°. In this paper, an research carried out on the design lens-hood for fisheye is proposed. In the way of reverse ray-tracing, the location on the first lens and point-vector for each incident ray can be accurately calculated. Thus the incident ray intersecting the first lens corresponds to the boundary of the image sensor form the effective object space. According to the figure of the lens and the incident rays, the lens-hood can be confirmed. In the proposed method, a space fisheye lens is presented as a typical lens, whose horizontal field and vertical field are 134°, diagonal field is up to 192°, respectively. The results of design for the lens-hood show that the lingering time of sunshine is shorten because of obstructing some redundant sunlight, and the first outstanding lens are protected in the most degree. © 2013 Copyright SPIE.

Number of references:9

Main heading:Optical systems

Controlled terms:Cameras - Design - Thermography (imaging)

Uncontrolled terms:Degree of incidence - Fish-eye - Ground experiments - Horizontal fields - Large-scale objects - Lens-hood - Space optical system - Wide field of view

Classification code:408 Structural Design - 741.3 Optical Devices and Systems - 742.1 Photography - 742.2 Photographic Equipment

DOI:10.1117/12.2032304

Database:Compendex

Accession number:20141317510156

Title:New scene-based adaptive bad pixel detection algorithm for IRFPA

Authors:Leng, Han-Bing (1); Zhou, Zuo-Feng (1); Liu, Wei (1); Yi, Bo (1); Xie, Qing-Sheng (1); Wu, Deng-Shan (1); Cao, Jian-Zhong (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8907

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications

Issue date:2013

Publication year:2013

Article number:89072T

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497765

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:Traditional bad pixel detection algorithm is always based on the radiometric calibration. This method is easy to operate, but only suitable for the bad pixels whose positions are fixed. During the longtime operation period, environment temperature usually has drastic influence on IRFPA, the number of bad pixels often increase and their positions also vary, this result in the degradation of infrared image quality. In this paper, a new scene-based adaptive bad pixel detection algorithm is proposed for IRFPA. The algorithm firstly comparing the pixel value with its neighborhood, and affirm bad pixels preliminary through a suitable threshold. Then the potential bad pixels from different scene are matched, false bad pixels caused by scene and targets are eliminated, real bad pixels are confirmed. The essence of the proposed algorithm is using the correlation between the pixel and its neighborhood. The bad pixels and some targets in the scene have a weak correlation within neighborhoods, and the position of bad pixels varies slowly while the scene varies drastically when IRFPA is in use. This new method can be implemented in hardware easily and achieve the real time demand. With the real infrared images obtained from a camera, the experiment results show the effectiveness of the proposed algorithm. © 2013 Copyright SPIE.

Number of references:10

Main heading:Pixels

Controlled terms:Algorithms - Signal detection - Thermography (imaging)

Uncontrolled terms:Bad pixels - Detection algorithm - Environment temperature - IRFPA - Long-time operation - Radiometric calibrations - Scene-based - Weak correlation

Classification code:716.1 Information Theory and Signal Processing - 723 Computer Software, Data Handling and Applications - 723.5 Computer Applications - 742.1 Photography - 742.2 Photographic Equipment - 921 Mathematics

DOI:10.1117/12.2033162

Database:Compendex

Accession number:20141717631768

Title:Complementary projection hashing

Authors:Jin, Zhongming (1); Hu, Yao (1); Lin, Yue (1); Zhang, Debing (1); Lin, Shiding (2); Cai, Deng (1); Li, Xuelong (3)

Author affiliation:(1) State Key Lab of CAD and CG, College of Computer Science, Zhejiang University, Hangzhou, China; (2) Baidu, Inc., Beijing, China; (3) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Xi'an 710119, Shaanxi, China

Source title:Proceedings of the IEEE International Conference on Computer Vision

Abbreviated source title:Proc IEEE Int Conf Comput Vision

Monograph title:Proceedings - 2013 IEEE International Conference on Computer Vision, ICCV 2013

Issue date:2013

Publication year:2013

Pages:257-264

Article number:6751141

Language:English

CODEN:PICVES

ISBN-13:9781479928392

Document type:Conference article (CA)

Conference name:2013 14th IEEE International Conference on Computer Vision, ICCV 2013

Conference date:December 1, 2013 - December 8, 2013

Conference location:Sydney, NSW, Australia

Conference code:104551

Sponsor:APRS; Australian National University; CVF; et al.; IEEE Computer Society; NICTA

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:Recently, hashing techniques have been widely applied to solve the approximate nearest neighbors search problem in many vision applications. Generally, these hashing approaches generate 2c buckets, where c is the length of the hash code. A good hashing method should satisfy the following two requirements: 1) mapping the nearby data points into the same bucket or nearby (measured by the Hamming distance) buckets. 2) all the data points are evenly distributed among all the buckets. In this paper, we propose a novel algorithm named Complementary Projection Hashing (CPH) to find the optimal hashing functions which explicitly considers the above two requirements. Specifically, CPH aims at sequentially finding a series of hyper planes (hashing functions) which cross the sparse region of the data. At the same time, the data points are evenly distributed in the hyper cubes generated by these hyper planes. The experiments comparing with the state-of-the-art hashing methods demonstrate the effectiveness of the proposed method. © 2013 IEEE.

Number of references:29

Main heading:Hamming distance

Controlled terms:Algorithms

Uncontrolled terms:Approximate nearest neighbor - Approximate Nearest Neighbor Search - Hashing - Hashing functions - Hashing techniques - Novel algorithm - Search problem - Vision applications

Classification code:723 Computer Software, Data Handling and Applications - 921 Mathematics - 921.6 Numerical Methods

DOI:10.1109/ICCV.2013.39

Database:Compendex

Accession number:20141317510148

Title:Calculation of signal-to-noise ratio (SNR) of infrared detection system based on MODTRAN model

Authors:Lu, Xue (1); Li, Chuang (1); Fan, Xuewu (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Li, C.

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8907

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications

Issue date:2013

Publication year:2013

Article number:89072K

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497765

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:Signal-to-noise ratio (SNR) is an important parameter of infrared detection system. SNR of infrared detection system is determined by the target infrared radiation, atmospheric transmittance, background infrared radiation and the detector noise. The infrared radiation flux in the atmosphere is determined by the selective absorption of the gas molecules, the atmospheric environment, and the transmission distance of the radiation, etc, so the atmospheric transmittance and infrared radiance flux are intricate parameters. A radiometric model for the calculation of SNR of infrared detection system is developed and used to evaluate the effects of various parameters on signal-to-noise ratio (SNR). An atmospheric modeling tool, MODTRAN, is used to model wavelength-dependent atmospheric transmission and sky background radiance. Then a new expression of SNR is deduced. Instead of using constants such as average atmospheric transmission and average wavelength in traditional method, it uses discrete values for atmospheric transmission and sky background radiance. The integrals in general expression of SNR are converted to summations. The accuracy of SNR obtained from the new method can be improved. By adopting atmospheric condition of the 1976 US standard, no clouds urban aerosols, fall-winter aerosol profiles, the typical spectrum characters of sky background radiance and transmittance are computed by MODTRON. Then the operating ranges corresponding to the threshold quantity of SNR are calculated with the new method. The calculated operating ranges are more close to the measured operating range than those calculated with the traditional method. © 2013 Copyright SPIE.

Number of references:8

Main heading:Signal to noise ratio

Controlled terms:Atmospheric aerosols - Detectors - Infrared detectors - Infrared radiation - Light transmission - Thermography (imaging)

Uncontrolled terms:Atmospheric conditions - Atmospheric environment - Atmospheric transmissions - Atmospheric transmittance - MODTRAN - Signaltonoise ratio (SNR) - Sky background - SNR

Classification code:716.1 Information Theory and Signal Processing - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 742.1 Photography - 804.1 Organic Compounds - 914 Safety Engineering - 914.1 Accidents and Accident Prevention

DOI:10.1117/12.2033048

Database:Compendex

Accession number:20141317516381

Title:Design of camera and spectrometer dual-use system

Authors:Qi, Yong-Hong (1); Xue, Bin (1); Zhao, Yi-Yi (1); Tao, Jin-You (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8910

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Spectrometer Technologies and Applications

Issue date:2013

Publication year:2013

Article number:891014

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497796

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:Imaging spectrometers based on prism-grating-prism (PGP) have advantage of direct vision, as a basis for the design of an optical system for a spectrometer and camera dual-use, the system can plug the light splitting element to switch between the spectrometer and camera. This paper has discussed the working principles and structure of the PGP and spectrometer, collimating and focusing lens design principles, then the design result has been presented. The spectral range of the system is 400-800nm, the pixel size of CCD used is 10um × 10um, 1010 × 1018 pixels, the object space numerical aperture is 0.1. In order to reduce the cost and eliminate aberration, collimating lens and focusing lens have symmetric structure, in order to improve the diffraction efficiency, PGP uses the volume phase holographic transmission grating. After optimization the design by ZEMAX software, the whole spectral range resolution is better than 1nm in average, the MTF at Nyquist frequency is greater than 0.7, the length of the whole system is 87mm. © 2013 SPIE.

Number of references:7

Main heading:Spectrometers

Controlled terms:Cameras - Optical design - Optical systems - Pixels - Prisms

Uncontrolled terms:Collimating lens - Imaging spectrometers - Light splitting - Numerical aperture - Nyquist frequency - Prism-Grating-Prism - Symmetric structures - Volume Phase Holographic

Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems - 742.2 Photographic Equipment

DOI:10.1117/12.2033622

Database:Compendex

Accession number:20141117450328

Title:Image super-resolution via double sparsity regularized manifold learning

Authors:Lu, Xiaoqiang (1); Yuan, Yuan (1); Yan, Pingkun (1)

Author affiliation:(1) Center for Optical Imagery Analysis and Learning, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Source title:IEEE Transactions on Circuits and Systems for Video Technology

Abbreviated source title:IEEE Trans Circuits Syst Video Technol

Volume:23

Issue:12

Issue date:December 2013

Publication year:2013

Pages:2022-2033

Article number:6428635

Language:English

ISSN:10518215

CODEN:ITCTEM

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:Over the past few years, high resolutions have been desirable or essential, e.g., in online video systems, and therefore, much has been done to achieve an image of higher resolution from the corresponding low-resolution ones. This procedure of recovering/rebuilding is called single-image super-resolution (SR). Performance of image SR has been significantly improved via methods of sparse coding. That is to say, the image frame patch can be sparse linear combinations of basis elements. However, most of these existing methods fail to consider the local geometrical structure in the space of the training data. To take this crucial issue into account, this paper proposes a method named double sparsity regularized manifold learning (DSRML). DSRML can preserve the properties of the aforementioned local geometrical structure by employing manifold learning, e.g., locally linear embedding. Based on a large amount of experimental results, DSRML is demonstrated to be more robust and more effective than previous efforts in the task of single-image SR. © 2013 IEEE.

Number of references:43

Main heading:Image coding

Controlled terms:Geometry - Online systems - Optical resolving power

Uncontrolled terms:Double sparsity - Geometrical structure - Image super-resolution - Linear combinations - Locally linear embedding - Manifold learning - Sparse coding - Superresolution

Classification code:722.4 Digital Computers and Systems - 741 Light, Optics and Optical Devices - 741.1 Light/Optics - 921 Mathematics

DOI:10.1109/TCSVT.2013.2244798

Database:Compendex

Accession number:20142817926612

Title:Mid-infrared fluorotellurite glasses and fibers

Authors:Zhan, Huan (1); Zhang, Aidong (1); He, Jianli (1); Zhou, Zhiguang (1); Li, Lu (1); Lin, Aoxiang (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi'an 710119, China; (2) Graduate School, Chinese Academy of Sciences (CAS), Beijing 100049, China

Corresponding author:Lin, A.(aoxiang@opt.ac.cn)

Source title:2013 Conference on Lasers and Electro-Optics, CLEO 2013

Abbreviated source title:Conf. Lasers Electro-Opt., CLEO

Monograph title:2013 Conference on Lasers and Electro-Optics, CLEO 2013

Issue date:2013

Publication year:2013

Article number:6833934

Language:English

ISBN-13:9781557529725

Document type:Conference article (CA)

Conference name:2013 Conference on Lasers and Electro-Optics, CLEO 2013

Conference date:June 9, 2013 - June 14, 2013

Conference location:San Jose, CA, United states

Conference code:106048

Publisher:IEEE Computer Society

Abstract:We report on the fabrication and characterization of rare earth ions-doped water-free fluorotellurite glasses and fibers. For 2.8 mm glass fiber rods, its background loss was -12 dB/m in the range of 2.5-4.2 urn. © 2013 The Optical Society.

Number of references:5

Main heading:Glass

Controlled terms:Metal ions

Uncontrolled terms:Background loss - Fabrication and characterizations - Fluoro-tellurite glass - Midinfrared

Classification code:533 Ore Treatment and Metal Refining - 812.3 Glass

Database:Compendex

Accession number:20141317521645

Title:The research of relay lens coupling in image intensified camera

Authors:Sun, Xin (1); Hu, Bing-Liang (1); Zou, Chun-Bo (1); Bai, Qing-Lan (1); Wang, Le (1)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology, Institute of Optics and Precision Mechanics, CAS, Xi'an 710119, China

Corresponding author:Sun, X.

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8912

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Low-Light-Level Technology and Applications

Issue date:2013

Publication year:2013

Article number:89121E

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497819

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE); The Optical Society; European Optical Society; European Optical Society

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:Image Intensified CCD (ICCD) camera is widely used in the field of low-light-level image detection. The crucial part of ICCD, coupling component, which realizes the image transmitting between the image intensifier and detector, affects the final performance of the ICCD camera significantly. There are two means of coupling: relay lens and optical fiber taper (OFT). OFT has the merits of small volume and relatively high coupling efficiency, therefore it is commonly used in the portable devices or applications with less precision demands. However, relay lens turns out to be a better solution other than OFT for the applications with no volume and weight restrictions, since it provides higher resolution, perfect image plane uniformity and manufacture flexibility. In this paper, we discuss a methodology of high performance relay lens design and based on the method a solid design is proposed. There are three major merits of the lens design. Firstly, the lens has large object space numerical aperture and thus the coupling efficiency reaches 5% at the magnification of 0.25. Secondly, the lens is telecentric in both sides of object space and image space, this feature guarantees uniform light collection over the field of view and uniform light receiving on the detector plane. Finally, the design can be conveniently optimized to meet the needs of different type of image intensifier. Moreover, the paper presents a prototype ICCD camera and a series of imaging experiment as well. The experiment results prove the validity of the foregoing analysis and optical design. © 2013 SPIE.

Number of references:6

Main heading:Cameras

Controlled terms:Detectors - Image intensifiers (solid state) - Optical design - Optical fibers - Optical instrument lenses

Uncontrolled terms:Coupling efficiency - Image-intensified camera - Imaging experiments - Low-light-level - Low-light-level image - Optical fiber tapers - Relay lens - Weight restriction

Classification code:714.2 Semiconductor Devices and Integrated Circuits - 741 Light, Optics and Optical Devices - 742.2 Photographic Equipment - 914 Safety Engineering

DOI:10.1117/12.2034709

Database:Compendex

Accession number:20132616448231

Title:Experimental research of high gain and low noise figure optical amplifier based on erbium-doped fiber

Authors:Zhang, Kewei (1); Zhao, Wei (1); Xie, Xiaoping (1); Wang, Wei (1); Qian, Fengchen (1); Han, Biao (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100049, China; (3) Xi'an Communication College, Xi'an, Shaanxi 710106, China

Corresponding author:Zhang, K.(zhangkewei@opt.cn)

Source title:Guangxue Xuebao/Acta Optica Sinica

Abbreviated source title:Guangxue Xuebao

Volume:33

Issue:5

Issue date:May 2013

Publication year:2013

Article number:0506003

Language:Chinese

ISSN:02532239

CODEN:GUXUDC

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:Considering the trade-off between the high gain and low noise figure in optical amplifier, a two-stage amplifier which has the structure to suppress the forward and backward-travelling amplified spontaneous emission noise with high gain and low noise figure based on Erbium-doped fiber is set up. Interpolation is used to test the power of amplified spontaneous emission (ASE) noise accurately. The gain and noise figures and some other parameters of the amplifier are analyzed. Comparison between the erbium-doped fiber amplifer (EDFA) and the commercial low noise EDFA is carried out. The results show that the highest gain of the EDFA in the experiment is 40.1 dB and the noise figure is 3.8 dB which is 0.8 dB above quantum-limit. The results when testing the amplifier and commercial EDFA in the same input power and gain show that the noise figure of the amplifier is 0.3 dB lower than the commercial EDFA.

Number of references:20

Main heading:Amplifiers (electronic)

Controlled terms:Fibers - Light amplifiers - Noise figure - Optical communication - Optical switches - Spontaneous emission

Uncontrolled terms:Amplified spontaneous emission noise - Amplified spontaneous emissions - Erbium doped fibers - Experimental research - Input power - Low noise - Low noise figure - Two-stage amplifiers

Classification code:817 Plastics and Other Polymers: Products and Applications - 812 Ceramics, Refractories and Glass - 741.3 Optical Devices and Systems - 717.1 Optical Communication Systems - 713.1 Amplifiers - 713 Electronic Circuits - 711 Electromagnetic Waves

DOI:10.3788/AOS201333.0506003

Database:Compendex

Accession number:20134316874279

Title:Advanced transient thermoreflectance 2D imaging for integrated circuit sub-micron defect detection and thermal analysis

Authors:Yazawa, Kazuaki (1); Kendig, Dustin (1); Zhang, Yan (2); Shakouri, Ali (3)

Author affiliation:(1) Microsanj, LLC., Santa Clara, CA, United States; (2) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (3) Birck Nanotechnology Center, Purdue University, West Lafayette, IN, United States

Source title:Proceedings of the International Symposium on the Physical and Failure Analysis of Integrated Circuits, IPFA

Abbreviated source title:Proc Int Symp Phys Failure Anal Integr Circuits IPFA

Monograph title:Proceedings of the 2013 20th IEEE International Symposium on the Physical and Failure Analysis of Integrated Circuits, IPFA 2013

Issue date:2013

Publication year:2013

Pages:127-131

Article number:6599139

Language:English

ISBN-13:9781479912414

Document type:Conference article (CA)

Conference name:2013 20th IEEE International Symposium on the Physical and Failure Analysis of Integrated Circuits, IPFA 2013

Conference date:July 15, 2013 - July 19, 2013

Conference location:Suzhou, China

Conference code:100081

Sponsor:IEEE Nanjing Section ED/SSC Joint Chapter; FEI Company; Digit Concept; Hanwa; WinTech

Publisher:Institute of Electrical and Electronics Engineers Inc., 445 Hoes Lane / P.O. Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:Transient thermoreflectance 2D thermal imaging is rapidly proving to be an effective technique for meeting the thermal analysis challenges inherent with today's advanced high speed integrated circuits. Using near infrared light illumination is particularly suitable for the thermal imaging of flip chip mounted devices and silicon substrate chips. High speed transient imaging reveals the timing of heating the spots in the circuit to identify if it is designed or unintended heating. Time-dependent unusual thermal signals provide the information of the depth location of a failure by knowing the time delay underneath the opaque layers. © 2013 IEEE.

Number of references:8

Main heading:Integrated circuits

Controlled terms:Defects - Delay circuits - Failure analysis - Flip chip devices - Infrared imaging - Thermoanalysis - Timing circuits - Transients

Uncontrolled terms:2-d imaging - Defect detection - High-speed integrated circuits - Near infrared light - Silicon substrates - Thermal signals - Thermoreflectance - Transient thermoreflectance

Classification code:921 Mathematics - 801 Chemistry - 746 Imaging Techniques - 714.2 Semiconductor Devices and Integrated Circuits - 951 Materials Science - 713.5 Electronic Circuits Other Than Amplifiers, Oscillators, Modulators, Limiters, Discriminators or Mixers - 621 Nuclear Reactors - 423 Non Mechanical Properties and Tests of Building Materials - 421 Strength of Building Materials; Mechanical Properties - 713.4 Pulse Circuits

DOI:10.1109/IPFA.2013.6599139

Database:Compendex

Accession number:20134216857663

Title:Field-programmable gate array-based hardware architecture for high-speed camera with KAI-0340 CCD image sensor

Authors:Wang, Hao (1); Yan, Su (1); Zhou, Zuofeng (1); Cao, Jianzhong (1); Yan, Aqi (1); Tang, Liniao (1); Lei, Yangjie (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, 710119, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8908

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Sensors and Applications

Issue date:2013

Publication year:2013

Article number:890811

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497772

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:We present a field-programmable gate array (FPGA)-based hardware architecture for high-speed camera which have fast auto-exposure control and colour filter array (CFA) demosaicing. The proposed hardware architecture includes the design of charge coupled devices (CCD) drive circuits, image processing circuits, and power supply circuits. CCD drive circuits transfer the TTL (Transistor-Transistor-Logic) level timing Sequences which is produced by image processing circuits to the timing Sequences under which CCD image sensor can output analog image signals. Image processing circuits convert the analog signals to digital signals which is processing subsequently, and the TTL timing, auto-exposure control, CFA demosaicing, and gamma correction is accomplished in this module. Power supply circuits provide the power for the whole system, which is very important for image quality. Power noises effect image quality directly, and we reduce power noises by hardware way, which is very effective. In this system, the CCD is KAI-0340 which is can output 210 full resolution frame-per-second, and our camera can work outstandingly in this mode. The speed of traditional auto-exposure control algorithms to reach a proper exposure level is so slow that it is necessary to develop a fast auto-exposure control method. We present a new auto-exposure algorithm which is fit high-speed camera. Color demosaicing is critical for digital cameras, because it converts a Bayer sensor mosaic output to a full color image, which determines the output image quality of the camera. Complexity algorithm can acquire high quality but cannot implement in hardware. An low-complexity demosaicing method is presented which can implement in hardware and satisfy the demand of quality. The experiment results are given in this paper in last. © 2013 SPIE.

Number of references:11

Main heading:Power supply circuits

Controlled terms:Algorithms - Analog circuits - Charge coupled devices - Color image processing - Exposure controls - Field programmable gate arrays (FPGA) - Hardware - High speed cameras - Image quality - Image sensors - Sensors - Signal detection - Timing circuits

Uncontrolled terms:Auto exposure - CCD image sensors - Color demosaicing - Complexity algorithms - Full color images - Full resolutions - Hardware architecture - Processing circuits

Classification code:921 Mathematics - 801 Chemistry - 742.2 Photographic Equipment - 742.1 Photography - 741 Light, Optics and Optical Devices - 723 Computer Software, Data Handling and Applications - 721.3 Computer Circuits - 716.1 Information Theory and Signal Processing - 714.2 Semiconductor Devices and Integrated Circuits - 713 Electronic Circuits - 605 Small Tools and Hardware

DOI:10.1117/12.2033013

Database:Compendex

Accession number:20133016530607

Title:Research of a new all-optical solid-state scanner based on GaAs

Authors:Xu, Guo Ya (1); He, Jun Hua (1); Sen, Fan (1); Zhu, Yuan Tao (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an Shaanxi, 710119, China; (2) Graduate School of CAS, Beijing, 100039, China

Source title:Advanced Materials Research

Abbreviated source title:Adv. Mater. Res.

Volume:710

Monograph title:Advanced Technologies and Solutions in Industry

Issue date:2013

Publication year:2013

Pages:269-272

Language:English

ISSN:10226680

ISBN-13:9783037857205

Document type:Conference article (CA)

Conference name:2013 International Conference on Advanced Technologies and Solutions in Industry, ICATSI 2013

Conference date:March 22, 2013 - March 23, 2013

Conference location:Taiyuan, Shanxi, China

Conference code:97849

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:Design an all-optical solid-state scanner chip, which can realize high speed light deflection in a very small space, instead of electron beam deflection scan image converter tube and opto-mechanical scanner, cancel the complicated mechanical components, use the all-optical scanning to realize the super fast phenomenon observation. The beam deflection system is based on semiconductor optical waveguide core layer carrier induced refractive index change effect to realize, its development work is mainly divided into semiconductor optical waveguide and saw prisms two parts. And through the experiment, we measured deflection angle of the scanner chip to 1053nm signal light. © (2013) Trans Tech Publications, Switzerland.

Number of references:8

Main heading:Scanning

Controlled terms:Gallium arsenide - Laser recording - Optical waveguides - Product design - Semiconducting gallium - Semiconductor materials

Uncontrolled terms:All-optical scanner - Beam deflection - Deflection angles - Electron beam deflection - GaAs - Light deflection - Mechanical components - Opto-mechanical scanners

Classification code:712.1 Semiconducting Materials - 712.1.1 Single Element Semiconducting Materials - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 804 Chemical Products Generally - 913.1 Production Engineering

DOI:10.4028/www.scientific.net/AMR.710.269

Database:Compendex

Accession number:20140917407639

Title:Research on detection and correction of defective pixels of LASIS

Authors:Jing, Juanjuan (1); Lv, Qunbo (1); Shi, Dalian (2)

Author affiliation:(1) Academy of Opto-Electronics, Chinese Academy of Sciences(CAS), Beijing, China; (2) Key Lab. of Spectral Imaging Technology, Xi'An Institute of Optics and Precision Mechanics, CAS, China

Source title:IST 2013 - 2013 IEEE International Conference on Imaging Systems and Techniques, Proceedings

Abbreviated source title:IST - IEEE Int. Conf. Imaging Syst. Tech., Proc.

Monograph title:IST 2013 - 2013 IEEE International Conference on Imaging Systems and Techniques, Proceedings

Issue date:2013

Publication year:2013

Pages:7-10

Article number:6729652

Language:English

ISBN-13:9781467357906

Document type:Conference article (CA)

Conference name:2013 IEEE International Conference on Imaging Systems and Techniques, IST 2013

Conference date:October 22, 2013 - October 23, 2013

Conference location:Beijing, China

Conference code:102804

Publisher:IEEE Computer Society, 2001 L Street N.W., Suite 700, Washington, DC 20036-4928, United States

Abstract:Due to the imperfections in producing, a finite number of pixels in an array will be defective. Regarding a Fourier transform Imaging spectrometer, the existence of defective pixels will not only affect the quality of the image, but also cause interferogram extraction error, and then result in a distortion of the reconstructed spectrum. So the defective pixels must be accurately distinguished and eliminated by data processing. In this paper, according to the characteristic of the Fourier transform Imaging spectrometer, a distinguishing and eliminating method is carried out. The Fourier transform Imaging spectrometer is illuminated by a uniform light. The data is fitted in the spatial dimension; the error between the actual data and the fitted data is computed and divided by the standard deviation. By choosing a proper threshold value, the cold, hot and non-saturated pixels can be effectively distinguished. Single defective pixels can be effectively corrected by spatial dimension interpolating; for clustered defective pixels, spatial dimension interpolating and interference dimension fitting are taken and the result is averaged. The experimental result proves that this method is effective and also efficient both for uniform light illuminated data and push broom data. © 2013 IEEE.

Number of references:10

Main heading:Pixels

Controlled terms:Data processing - Imaging systems - Interferometry - Interpolation - Spectrometers

Uncontrolled terms:Data fittings - Finite number - Fourier transform imaging spectrometers - Interferograms - interpolating - Spatial dimension - Standard deviation

Classification code:723.2 Data Processing and Image Processing - 723.5 Computer Applications - 801 Chemistry - 921.6 Numerical Methods - 941.4 Optical Variables Measurements

DOI:10.1109/IST.2013.6729652

Database:Compendex

Accession number:20134016793882

Title:Wide-range continuously-tunable slow-light delay line based on stimulated brillouin scattering

Authors:Ju, Haijuan (1); Ren, Liyong (1); Lin, Xiao (1); Liang, Jian (1); Ma, Chengju (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Source title:IEEE Photonics Technology Letters

Abbreviated source title:IEEE Photonics Technol Lett

Volume:25

Issue:19

Issue date:2013

Publication year:2013

Pages:1920-1923

Article number:6582552

Language:English

ISSN:10411135

CODEN:IPTLEL

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., 445 Hoes Lane / P.O. Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:Through selectively controlling the stimulated Brillouin scattering in optical fibers with different lengths, a continuously tunable time-delay scheme enabling to work in a large range is proposed in this letter. This is realized by connecting a fixed long single-mode fiber (SMF) to one of the several selectable short SMFs that successively have an equal increment in length. These short-length fibers are, respectively, fixed to the different channels between two identical optical switches. Therefore, a wide-range and continuously tunable slow-light delay line can be constructed by changing the power of the pump beam, assisted by switching to different channels. In the experiment, a time delay from 0 to 201.29 ns is demonstrated for a five-channel configuration. A further large-range time delay can be expected if one adds the number of channels accordingly. © 2013 IEEE.

Number of references:20

Main heading:Slow light

Controlled terms:Optical fibers - Single mode fibers - Stimulated Brillouin scattering - Time delay - Waves

Uncontrolled terms:Optical delay lines - Pump beams - Slow-light delay - Stimulated Brillouin Scattering (SBS)

Classification code:713 Electronic Circuits - 731 Automatic Control Principles and Applications - 741.1 Light/Optics - 741.1.2 Fiber Optics

DOI:10.1109/LPT.2013.2278536

Database:Compendex

Accession number:20131516200535

Title:A compact interferometer insensitive to scanning speed variations

Authors:Yang, Qinghua (1); Zhao, Baochang (2); Zeng, Xiaodong (1)

Author affiliation:(1) School of Technical Physics, Xidian University, Xi'an 710071, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Yang, Q.(yangqh666@163.com)

Source title:Chinese Optics Letters

Abbreviated source title:Chin. Opt. Lett.

Volume:11

Issue:2

Issue date:February 2013

Publication year:2013

Article number:021202

Language:English

ISSN:16717694

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:A compact moving optical-wedge interferometer (CMOWI) is presented. This device consists of a moving optical wedge (MOW), a fixed optical wedge (FOW), a fixed compensating plate, and a beam-splitting cube. The optical path difference (OPD) is calculated and analyzed. The factor between the OPD and the displacement of the MOW is less than 1 if the refractive index and wedge angle of the MOW and FOW are chosen properly. Therefore, the CMOWI is insensitive to scanning speed variations compared with the traditional Michelson interferometer. The CMOWI is compact, small-sized, and suitable for low-resolution Fourier transform spectroscopy. © 2013 Chinese Optics Letters.

Number of references:7

Main heading:Refractive index

Controlled terms:Michelson interferometers

Uncontrolled terms:Beam-splitting cubes - Compact interferometer - Fourier transform spectroscopy - Low resolution - Optical path difference - Optical wedges - Scanning speed - Wedge angle

Classification code:741.1 Light/Optics - 941.3 Optical Instruments

DOI:10.3788/COL201311.021202

Database:Compendex

Accession number:20134616987924

Title:Adaptive cancellation of light relative intensity noise for fiber optic gyroscope

Authors:Ji, Zhongxiao (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of the Chinese Academy of Sciences, Xi'an 710119, China; (2) Graduate University of the Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Ji, Z.(wnq_8510@163.com)

Source title:Telkomnika - Indonesian Journal of Electrical Engineering

Abbreviated source title:Telkomnika Indonesian J. Elect. Eng.

Volume:11

Issue:12

Issue date:December 2013

Publication year:2013

Pages:7490-7499

Language:English

ISSN:23024046

E-ISSN:2087278X

Document type:Journal article (JA)

Publisher:Universitas Ahmad Dahlan, Jalan Kapas 9, Semaki, Umbul Harjo,, Yogiakarta, 55165, Indonesia

Abstract:In order to reduce the relative intensity noise (RIN) in the interferometric signal of the fiber opticgyroscope (FOG), an adaptive noise subtraction method is presented, which aims to overcome to the drawbacks that the fixed delay time and gain of the digital noise subtraction method. The drawbacks willmake the performance of FOG to be degraded greatly in the changing environment. In the paper theadaptive noise subtraction system based on the recursive least squares algorithm (RLS) is formed inFPGA, in which the interferometric signal is regarded as the signal source, and RIN in the free end of theoptical fiber coupler of FOG is looked as the noise reference signal. The two critical parameters that minimum delay time and its varying range result from measuring the minimum and maximum delay times of the interferometric signal in a certain temperature range. The off-line and on-line temperature experimental results verify the capability of adapting to the environmental temperature. © 2013 Universitas Ahmad Dahlan.

Number of references:13

Main heading:Gyroscopes

Controlled terms:Fiber optics

Uncontrolled terms:Adaptive cancellation - Changing environment - Environmental temperature - Fiber optic gyroscopes - Interferometric signals - Recursive least square (RLS) - Recursive least squares algorithms - Relative intensity noise

Classification code:741.1.2 Fiber Optics - 943.1 Mechanical Instruments

Database:Compendex

Accession number:20131616218928

Title:Image fusion of tempo-spatially modulated polarization interference imaging spectrometer

Authors:Zhang, Chunmin (1); Cao, Qizhi (1); Jian, Xiaohua (4); Ren, Wenyi (1); Zhang, Jing (3)

Author affiliation:(1) Xi'an Jiaotong University School of Science, Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Ministry of Education, Xi'an 710049, China; (2) Spatial Optics Department, Xi'an Institute of Optics and Precision Mechanics, Academia Sinica, Xi'an 710048, China; (3) School of Physics and Electronic Information Science, Guangxi Teachers College, Nanning 530023, China; (4) Suzhou Institute of Biomedical Engineering and Technology, CAS, Suzhou 215163, China

Corresponding author:Zhang, C.(zcm@mail.xjtu.edu.cn)

Source title:Optics Communications

Abbreviated source title:Opt Commun

Volume:297

Issue date:June 15, 2013

Publication year:2013

Pages:12-19

Language:English

ISSN:00304018

CODEN:OPCOB8

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:The space-based tempo-spatially modulated polarization interferometer imaging spectrometer (TSMPIIS) scans over an observed area, and acquires the image-spectrum data cubic consisting of a series of the CCD images taken at different times. Every pixel on the CCD image records interferographs with different optical path differences, corresponding to the incident angles changing from maximum, via zero, and finally to negative maximum. To improve the spatial resolution of the color comprised image acquired by TSMPIIS, the panchromatic (PAN) image of high spatial resolution is fused with the color composite image of high spectrum resolution to produce the fused image of both high spatial and spectrum resolution. Based on the characteristics of the TSMPIIS image data, the FFT (fast Fourier transform)-enhanced IHS (intensity-hue-saturation) transform method is used and compared with IHS and WT (wave transform) methods. The experimental results show that the FFT-enhanced IHS method can establish very good trade-off between spatial and spectral quality of the fused image and largely improve the spatial resolution of the color composite image. The fusion method significantly enhances the instrument performance at very low cost. © 2013 Elsevier B.V.

Number of references:23

Main heading:Spectrometers

Controlled terms:Color - Fast Fourier transforms - Fusion reactions - Image fusion - Image resolution

Uncontrolled terms:FFT (fast Fourier transform) - Filter - High spatial resolution - Intensity hue saturations - Optical path difference - Panchromatic (Pan) image - Polarization interferences - Polarization interferometer

Classification code:621.2 Fusion Reactors - 723.2 Data Processing and Image Processing - 741.1 Light/Optics - 801 Chemistry - 921.3 Mathematical Transformations

DOI:10.1016/j.optcom.2013.01.041

Database:Compendex

Accession number:20134316876168

Title:Two approaches to improve FPGA performance for the stereo camera of the chang'e-1 satellite

Authors:Duan, Yongqiang (1); Wen, Desheng (1); Gao, Wei (1); Zhao, Baochang (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Shaanxi, 710119, China; (2) University of Chinese Academy of Sciences (CAS), Beijing. Mailing Address: No. 17 Xinxi Road, New Industrial Park, Xi'an Hi-Tech Industrial Development Zone, Xi'an, Shaanxi, 710119, China

Source title:IEEE Aerospace and Electronic Systems Magazine

Abbreviated source title:IEEE Aerosp Electron Syst Mag

Volume:28

Issue:9

Issue date:2013

Publication year:2013

Pages:16-29

Article number:6617095

Language:English

ISSN:08858985

CODEN:IESMEA

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., 445 Hoes Lane / P.O. Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:The CE-1 satellite was successfully launched on October 24, 2007, and was guided to crash-land on the Moon on March 1, 2009. The FPGA of the CCD stereo camera operated more than 1 year without faults, exceeding the expected life span by about 4 months. The first lunar image from CE-1 was obtained on November 20 and November 21, 2007, and was released on November 26, 2007 (Figure 14). A three-dimensional image was acquired by processing at the same time and released on November 26, 2007 (Figure 15). The raw data obtained by the CCD stereo camera included 508 orbit images between the latitudes of 70°N and 70°S and 589 polar orbit images. Many scientific results have been obtained by analyzing these data [26], especially the ¿global lunar image from the first Chinese lunar exploration mission¿ in [27]. The results of the onboard flight validate that the FPGA design of the CCD stereo camera is reasonable and reliable and has achieved the mission requirements. © 1986-2012 IEEE.

Number of references:27

Main heading:CCD cameras

Controlled terms:Moon

Uncontrolled terms:Expected life - Exploration missions - FPGA design - Mission requirements - Polar orbit - Scientific results - Stereo cameras - Three dimensional images

Classification code:657.2 Extraterrestrial Physics and Stellar Phenomena - 714.2 Semiconductor Devices and Integrated Circuits

DOI:10.1109/MAES.2013.6617095

Database:Compendex

Accession number:20131516188564

Title:Crystallization and absorption properties of novel photo-thermal refractive glasses with the addition of B<inf>2</inf>O<inf>3</inf>

Authors:Wang, Pengfei (1); Lu, Min (1); Li, Weinan (1); Gao, Fei (1); Peng, Bo (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences (CAS), Xi'an 710119, China

Corresponding author:Peng, B.(bpengcas@yahoo.cn)

Source title:Journal of Non-Crystalline Solids

Abbreviated source title:J Non Cryst Solids

Volume:368

Issue:1

Issue date:2013

Publication year:2013

Pages:55-62

Language:English

ISSN:00223093

CODEN:JNCSBJ

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:A new boron-containing photo-thermal-refractive (boron-PTR) glass was prepared by two-step melt-quenching techniques at relative lower glass melting temperature. The influence of Ag+ doping concentration, UV exposure dosage and thermal development parameters on the boron-PTR glass' spectroscopic absorption and crystallization property were investigated and compared with that of the known boron-free PTR glass explored by L. B. Glebov et al. The introduction of B<inf>2</inf>O<inf>3</inf>, to some extent, can increase the strength of the silicate bonding thus preventing the liquid-liquid phase separation in this new PTR system when compared to the boron-free PTR system. The developed boron-PTR glass with the processing of 15 s-UV exposure and appropriate thermal development (480 C/3 h, 500 C/2 h) exhibits good photo-induced crystallization performance, high VIS-near IR transmittance (670 to 2600 nm) and moderate photo-induced refractive index change (1.1 × 10- 3), which at present status enables this new PTR glass basic ability to record holographic elements. © 2013 Elsevier B.V.

Number of references:34

Main heading:Glass

Controlled terms:Absorption - Absorption spectroscopy - Boron - Crystallization - Forced convection - Glass manufacture - Phase separation - Silicates

Uncontrolled terms:Crystallization properties - Glass melting temperature - Liquid-liquid phase separation - Melt quenching techniques - Photo-induced crystallization - Spectroscopic absorption - Thermal development - UV exposure

Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 812.3 Glass - 812 Ceramics, Refractories and Glass - 801 Chemistry - 933.1 Crystalline Solids - 741 Light, Optics and Optical Devices - 641.1 Thermodynamics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 414 Masonry Materials - 641.2 Heat Transfer

DOI:10.1016/j.jnoncrysol.2013.03.002

Database:Compendex

Accession number:20132916508844

Title:Model of radial artery based on human pulse

Authors:Wang, Xuemin (1); Yang, Cheng (1); Lu, Xiaozuo (2); Sun, Tao (3); Zhou, Peng (1)

Author affiliation:(1) School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China; (2) School of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China; (3) School of Biomedical Engineering, The Fourth Military Medical University, Xi'an 710032, China

Corresponding author:Zhou, P.(zpzpa@vip.sina.com)

Source title:Tianjin Daxue Xuebao (Ziran Kexue yu Gongcheng Jishu Ban)/Journal of Tianjin University Science and Technology

Abbreviated source title:Tianjin Daxue Xuebao (Ziran Kexue yu Gongcheng Jishu Ban)

Volume:46

Issue:6

Issue date:June 2013

Publication year:2013

Pages:487-492

Language:Chinese

ISSN:04932137

CODEN:TCHHA9

Document type:Journal article (JA)

Publisher:Tianjin University, Tianjin, 300072, China

Abstract:For the purpose of clarifying the differences and similarities of different pulses, a radial artery circuit model was built based on the existing model of two elastic chambers and elastic tube by analyzing the pulse signal with engineering method. With the help of this model, a simulation was conducted, aiming at finding out what will happen to the output signal of Guan and Cun when there is a change in resistance and inductance between Chi and Cun has the same input signal. The experimental result shows that the change has more influence on Cun than on Guan, which indicates that the way the doctor changes his fingers when taking a diagnosis will has great effect on pulse wave, so he can get more information by adjusting his finger tips. The comparison of the pulse at Cun before and after the pressure change at Guan explains the reasonableness in the way of Chinese pulse diagnosis.

Number of references:15

Main heading:Computer simulation

Controlled terms:Tubes (components)

Uncontrolled terms:Circuit models - Elastic tubes - Engineering methods - Human pulse - Pressure change - Pulse diagnosis - Radial artery - Resistance and inductance

Classification code:616.1 Heat Exchange Equipment and Components - 723.5 Computer Applications

DOI:10.11784/tdxb20130603

Database:Compendex

Accession number:20134416937961

Title:A FPGA-based digital-mirror driving control system for compressive imaging

Authors:Li, Shi Bo (1); He, Jun Hua (1); Lv, Pei (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an 710119, China

Source title:Advanced Materials Research

Abbreviated source title:Adv. Mater. Res.

Volume:760-762

Monograph title:Optoelectronics Engineering and Information Technologies in Industry

Issue date:2013

Publication year:2013

Pages:1259-1262

Language:English

ISSN:10226680

ISBN-13:9783037857731

Document type:Conference article (CA)

Conference name:2nd International Conference on Opto-Electronics Engineering and Materials Research, OEMR 2013

Conference date:October 19, 2013 - October 20, 2013

Conference location:Zhengzhou, Henan, China

Conference code:100390

Sponsor:Computer Science and Electronic Technology; Trans tech publications inc.; National Cheng Kung University

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:With FPGA as the host controller, a set of hardware system based on digital micro-mirror device (DMD) for compressive imaging (CI) was developed. This paper studies the principle and characteristic of DMD control. First, the data of PC Screen image is transferred to DMD driver by software using binary pulse width modulation (BPWM) technology. The data is then rewritten into a control single which finally directs the DMD. The test results proved that the digital image received can be loaded onto the micro-mirrors excellently and with optics module installed, the system could successfully implement the CS measurement patterns which satisfy CI system. © (2013) Trans Tech Publications, Switzerland.

Number of references:6

Main heading:Optical testing

Controlled terms:Electronics engineering - Field programmable gate arrays (FPGA) - Information technology - Mirrors

Uncontrolled terms:Compressive imaging - Digital micro-mirror device - DMD - Driving control - Hardware system - Host controller - Measurement patterns - USB2.0 transferring

Classification code:903 Information Science - 741.3 Optical Devices and Systems - 721.3 Computer Circuits - 718 Telephone Systems and Related Technologies; Line Communications - 717 Optical Communication - 716 Telecommunication; Radar, Radio and Television - 715 Electronic Equipment, General Purpose and Industrial - 714 Electronic Components and Tubes - 713 Electronic Circuits

DOI:10.4028/www.scientific.net/AMR.760-762.1259

Database:Compendex

Accession number:20132016328399

Title:Spatiotemporal shaping of terahertz pulses using conductive apertures of finite thickness

Authors:Zou, Shengwu (1); Zhang, Tongyi (1)

Corresponding author:Zhang, T.(tyzhang@opt.ac.cn)

Source title:Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams

Abbreviated source title:Qiangjiguang Yu Lizishu

Volume:25

Issue:5

Issue date:May 2013

Publication year:2013

Pages:1325-1331

Language:English

ISSN:10014322

CODEN:QYLIEL

Document type:Journal article (JA)

Publisher:Editorial Office of High Power Laser and Particle Beams, P.O. Box 919-805, Mianyang, 621900, China

Abstract:Terahertz (THz) pulses after spatiotemporal shaping have been widely applied to THz spectroscopy and imaging. We simulate the shaping effect of rectangular and circular apertures by employing the three-dimensional (3D) finite-difference-time-domain (FDTD) method. The simulation results show that we can realize effective shaping and filtering of THz pulses using rectangular and circular conductive apertures of finite thickness. When the long side of the rectangular aperture is perpendicular to the polarization direction of the incident wave, the rectangular aperture has a good influence on the shaping and filtering of THz pulses. However, when the long side of the rectangular aperture is parallel to the polarization direction of the incident wave, it almost has no obvious effect on the shaping and filtering of THz pulses. The circular aperture has more obvious effect on shaping of THz pulses than the rectangular aperture. Moreover, these simulation results can be interpreted qualitatively by the theory of planar waveguides.

Number of references:22

Main heading:Pulse shaping

Controlled terms:Finite difference time domain method - Polarization - Terahertz waves - Time domain analysis

Uncontrolled terms:Circular aperture - Finite thickness - Polarization direction - Rectangular aperture - Spatiotemporal shaping - Tera Hertz - Terahertz pulse - Thz spectroscopy

Classification code:711 Electromagnetic Waves - 711.1 Electromagnetic Waves in Different Media - 713.4 Pulse Circuits - 921 Mathematics

DOI:10.3788/HPLPB20132505.1325

Database:Compendex

Accession number:20131716229854

Title:Two-dimensional sub-half-wavelength atom localization via phase control of absorption and gain

Authors:Wan, Ren-Gang (1); Zhang, Tong-Yi (1); Kou, Jun (2)

Corresponding author:Wan, R.-G.(wrg@opt.ac.cn)

Source title:Physical Review A - Atomic, Molecular, and Optical Physics

Abbreviated source title:Phys Rev A

Volume:87

Issue:4

Issue date:April 15, 2013

Publication year:2013

Article number:043816

Language:English

ISSN:10502947

E-ISSN:10941622

CODEN:PLRAAN

Document type:Journal article (JA)

Publisher:American Physical Society, One Physics Ellipse, College Park, MD 20740-3844, United States

Abstract:We propose a scheme for two-dimensional atom localization based on the coherent controlled absorption and gain of a weak probe field in a four-level double-Λ system, in which the atom interacts with two orthogonal standing-wave fields. Owing to the space-dependent atom-field interaction, the position probability distribution of the atom passing through the standing waves can be directly determined by measuring the resulting absorption and gain spectra. The phase-sensitive property of the atomic system significantly reduces the uncertainty in the position measurement of the atom. It is found that, by properly varying the parameters of the system, we can achieve sub-half-wavelength atom localization with high precision. Especially the probability of finding the atom at a particular position can be 100% when a photon with certain frequency is absorbed or amplified. Numerical calculations and qualitative analyses show that the enhancement of precision in the position measurement of the atom is attributed to the interference between the one-photon excitation and the phase-dependent three-photon excitation from the closed interacting contour in the laser-driven atomic system. © 2013 American Physical Society.

Number of references:40

Main heading:Atom lasers

Controlled terms:Atoms - Laser excitation - Multiphoton processes - Photons - Position measurement - Probability distributions - Two dimensional

Uncontrolled terms:Atom localization - Atom-field interaction - Numerical calculation - One-photon excitation - Qualitative analysis - Standing-wave field - Three-photon excitation - Two-dimensional atoms

Classification code:744.1 Lasers, General - 744.9 Laser Applications - 902.1 Engineering Graphics - 922.1 Probability Theory - 931.3 Atomic and Molecular Physics - 943.2 Mechanical Variables Measurements

DOI:10.1103/PhysRevA.87.043816

Database:Compendex

Accession number:20134416940654

Title:Survey on reconstruction algorithm based on compressive sensing

Authors:Li, Shen (1); Ma, Caiwen (1); Li, Yan (1); Chen, Ping (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Li, S.(waterblue_333@opt.ac.cn)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:42

Issue:SUPPL.1

Issue date:2013

Publication year:2013

Pages:225-232

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:With the rapid demanding for information, the existing systems are very difficult to meet the challenges of high speed sampling, large volume data transmission and storage. Recently, a new sampling theory called compressive sensing (CS) provides a golden opportunity for solving this problem. CS theory asserts that a signal or image, unknown but supposed to be sparse or compressible in some basis, can be subjected to fewer measurements than traditional methods, and be accurately reconstructed. Firstly, a brief overview of the CS theory framework was given in this paper and the sampling process about signal compression was discussed. Next, the reconstruction algorithm of CS theory was reviewed. Especially, the basis pursuit algorithm and greedy algorithms were introduced and the difference between them was explored. In the end, possible implication in the areas of CS data reconstruction was briefly discussed. This paper provides theory basis for the improvement and application of compressed sensing reconstruction algorithm.

Number of references:60

Main heading:Algorithms

Controlled terms:Compressed sensing - Digital storage - Signal reconstruction

Uncontrolled terms:Compressive sensing - Data reconstruction - Greedy algorithms - High speed sampling - Information samplings - Reconstruction algorithms - Signal compression - Sparse

Classification code:716.1 Information Theory and Signal Processing - 722.1 Data Storage, Equipment and Techniques - 723 Computer Software, Data Handling and Applications - 921 Mathematics

Database:Compendex

Accession number:20131416178299

Title:Modal characteristics analysis of a doubly clad optical fiber with semi-weakly guiding approximation

Authors:Tan, Xuefei (1); Liu, Xianglian (1); Zhao, Wei (1); Li, Cheng (1); Wang, Yishan (1); Li, Jianfeng (3)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an 710119, China; (2) University of the Chinese Academy of Science, Beijing 100049, China; (3) State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC), Chengdu 610054, China

Corresponding author:Wang, Y.(yshwang@opt.ac.cn)

Source title:Optics Communications

Abbreviated source title:Opt Commun

Volume:294

Issue date:May 1, 2013

Publication year:2013

Pages:148-155

Language:English

ISSN:00304018

CODEN:OPCOB8

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:Modified characteristic equations for doubly clad multimode fibers were rigorously derived under semi-weakly guiding approximation in this article. The analytical expressions of the power flows distributed in the three regions of fiber cross section are also given. Different from previous works, results in this paper elucidate that, other than the inner cladding, the refractive indices also hold a non-ignorable influence on the modal power distribution and mode behaviors. By comparing the results of two models, this article demonstrates that the singly clad fiber model may not be suitable for analyses of common doubly clad fibers. © 2012 Elsevier B.V.

Number of references:15

Main heading:Multimode fibers

Controlled terms:Fibers - Refractive index

Uncontrolled terms:Analytical expressions - Characteristic equation - Doubly clad optical fiber - Fiber cross section - Inner cladding - Modal characteristics - Modal power distributions - Power distributions

Classification code:741.1 Light/Optics - 741.1.2 Fiber Optics - 812 Ceramics, Refractories and Glass - 817 Plastics and Other Polymers: Products and Applications

DOI:10.1016/j.optcom.2012.11.080

Database:Compendex

Accession number:20132216376032

Title:Precise alignment of separated Sagnac interferometer

Authors:Zhang, Xuemin (1); Wei, Ruyi (1); Yan, Su (1); Duan, Jiayou (1); Li, Hua (1); Yang, Jianfeng (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Wei, R.(ruyiwei@opt.ac.cn)

Source title:Zhongguo Jiguang/Chinese Journal of Lasers

Abbreviated source title:Zhongguo Jiguang

Volume:40

Issue:4

Issue date:April 2013

Publication year:2013

Article number:0416001

Language:Chinese

ISSN:02587025

CODEN:ZHJIDO

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:A separated Sagnac interferometer with optical diameter of 60 mm and spectral channel of 65 is introduced based on its working principle. Ideal interference fringes and interference fringes are simulated when reflector has an angle deviation, and the effect of alignment error to the interference fringes is analyzed. The position accuracy and angle accuracy of alignment are induced based on the optical design parameters. The method of precision alignment is introduced in detail, which includes the installation of primary alignment plane, the precise location of splitting prism, the precise adjustment of long-arm and short-arm reflectors. Through the installation of alignment refrence and the masterly refrence transformation, the precise alignment of separated Sagnac interferometer is achieved based on the principle of auto-collimation, whose position accuracy is better than 0.01 mm, angle accuracy is better than 1″, super possition accuracy of primary working plane is better than 1″.

Number of references:15

Main heading:Separation

Controlled terms:Fiber optic sensors - Optical design - Reflection

Uncontrolled terms:Angle accuracies - Position accuracy - Precise alignments - Sagnac interferometer - Separated

Classification code:741.1 Light/Optics - 741.1.2 Fiber Optics - 802.3 Chemical Operations

DOI:10.3788/CJL201340.0416001

Database:Compendex

Accession number:20132016329276

Title:A space audio cummunication system based on X-ray

Authors:Deng, Ning-Qin (1); Zhao, Bao-Sheng (1); Sheng, Li-Zhi (1); Yan, Qiu-Rong (1); Yang, Hao (1); Liu, Duo (1)

Corresponding author:Deng, N.-Q.(dengningqin@163.com)

Source title:Wuli Xuebao/Acta Physica Sinica

Abbreviated source title:Wuli Xuebao

Volume:62

Issue:6

Issue date:March 20, 2013

Publication year:2013

Article number:060705

Language:Chinese

ISSN:10003290

CODEN:WLHPAR

Document type:Journal article (JA)

Publisher:Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing, 100190, China

Abstract:In this paper, an X-ray communication program, which consists of a sender of grid controlled X-ray source and a receiver of X-ray single-photon detector based on micro-channel plate, is presented. With the detailed information about the signal modulation transmitter, the micro-channel-based X-ray single-photon detector as well as the signal receiving demodulator, a space audio communication system based on X-ray is built. The communication rate of more than 20 kbit/s is realized. According to the preliminary test result analyses of the X-ray space audio communication system test, the X-ray emission success rate restricts the communication speed by the influence of different X-ray intensities, signal shaping time and threshold settings respectively. Therefore, a scheme for further increasing X-ray communication performance is suggested. © 2013 Chinese Physical Society.

Number of references:13

Main heading:X rays

Controlled terms:Communication systems - Detectors - Electron sources - Particle beams - Photodetectors - Photons - X ray apparatus

Uncontrolled terms:Communication performance - Communication rate - Communication speed - Micro channel plate - Signal modulations - Single-photon detectors - Threshold setting - X-ray sources

Classification code:716 Telecommunication; Radar, Radio and Television - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 801 Chemistry - 914 Safety Engineering - 932.1 High Energy Physics

DOI:10.7498/aps.62.060705

Database:Compendex

Accession number:20132916512171

Title:Graph-regularized low-rank representation for destriping of hyperspectral images

Authors:Lu, Xiaoqiang (1); Wang, Yulong (2); Yuan, Yuan (1)

Author affiliation:(1) Center for Optical Imagery Analysis and Learning, State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Xi'an 710119, China; (2) Faculty of Mathematics and Computer Science, Hubei University, Wuhan 430062, China

Source title:IEEE Transactions on Geoscience and Remote Sensing

Abbreviated source title:IEEE Trans Geosci Remote Sens

Volume:51

Issue:7

Issue date:2013

Publication year:2013

Pages:4009-4018

Article number:6418020

Language:English

ISSN:01962892

CODEN:IGRSD2

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., 445 Hoes Lane / P.O. Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:Hyperspectral image destriping is a challenging and promising theme in remote sensing. Striping noise is a ubiquitous phenomenon in hyperspectral imagery, which may severely degrade the visual quality. A variety of methods have been proposed to effectively alleviate the effects of the striping noise. However, most of them fail to take full advantage of the high spectral correlation between the observation subimages in distinct bands and consider the local manifold structure of the hyperspectral data space. In order to remedy this drawback, in this paper, a novel graph-regularized low-rank representation (LRR) destriping algorithm is proposed by incorporating the LRR technique. To obtain desired destriping performance, two sides of performing destriping are included: 1) To exploit the high spectral correlation between the observation subimages in distinct bands, the technique of LRR is first utilized for destriping, and 2) to preserve the intrinsic local structure of the original hyperspectral data, the graph regularizer is incorporated in the objective function. The experimental results and quantitative analysis demonstrate that the proposed method can both remove striping noise and achieve cleaner and higher contrast reconstructed results. © 1980-2012 IEEE.

Number of references:41

Main heading:Spectroscopy

Controlled terms:Independent component analysis - Remote sensing

Uncontrolled terms:Destriping - Hyper-spectral images - Low-rank representations - Regularizer - Spectral correlation

Classification code:723.4 Artificial Intelligence - 731.1 Control Systems - 801 Chemistry

DOI:10.1109/TGRS.2012.2226730

Database:Compendex

Accession number:20134817040197

Title:Design of new wide-angle unobscured three-mirror optical system

Authors:Pang, Zhihai (1); Fan, Xuewu (1); Zou, Gangyi (1); Zhao, Hui (1)

Author affiliation:(1) Space Optics Laboratory, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an 710119, China; (2) University of Chinese Academy of Science, Beijing 100049, China

Corresponding author:Pang, Z.(uestc_pzh@126.com)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:42

Issue:9

Issue date:September 2013

Publication year:2013

Pages:2449-2452

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:For the disadvantage of conventional three mirrors system to achieve wide field of view, a new-style unobscured three -mirror optical system with wide field of view was designed based on the retrofocus -type objective configuration. One powerful retrofocus design approach was the combination with a reversed Galilean Telescope, the expression of initial configuration parameters was obtained and the unobscured style was carried out by decenter the field. A system with effective focal length of 100 mm, field of view of 20° × 20° and F-number of 5 was designed, the modulation transfer function value at spatial frequency of 50 lp/mm was over 0.6 and image qualities were excellent. Compared with traditional common three-mirror optical systems, the most prominent advantage of this new three-mirror system are that it can provide wide field of view and just use two aspheric mirrors and one spherical, so that the cost of this system will be reduced.

Number of references:10

Main heading:Optical systems

Controlled terms:Mirrors - Optical design

Uncontrolled terms:Effective focal lengths - Galilean telescopes - Initial configuration - Reflective systems - Spatial frequency - Three-mirror system - Wide field of view - Wide-angle

Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems

Database:Compendex

Accession number:20134216859371

Title:Mean shift based gradient vector flow for image segmentation

Authors:Zhou, Huiyu (1); Li, Xuelong (2); Schaefer, Gerald (3); Celebi, M. Emre (4); Miller, Paul (1)

Author affiliation:(1) ECIT, Queen's University Belfast, Belfast BT3 9DT, United Kingdom; (2) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China; (3) Department of Computer Science, Loughborough University, Loughborough LE11 3TU, United Kingdom; (4) Department of Computer Science, Louisiana State University, Shreveport, LA 71115, United States

Corresponding author:Zhou, H.(h.zhou@ecit.qub.ac.uk)

Source title:Computer Vision and Image Understanding

Abbreviated source title:Comput Vision Image Understanding

Volume:117

Issue:9

Issue date:2013

Publication year:2013

Pages:1004-1016

Language:English

ISSN:10773142

E-ISSN:1090235X

CODEN:CVIUF4

Document type:Journal article (JA)

Publisher:Academic Press Inc., 1250 Sixth Avenue, San Diego, California, CA 92101, United States

Abstract:In recent years, gradient vector flow (GVF) based algorithms have been successfully used to segment a variety of 2-D and 3-D imagery. However, due to the compromise of internal and external energy forces within the resulting partial differential equations, these methods may lead to biased segmentation results. In this paper, we propose MSGVF, a mean shift based GVF segmentation algorithm that can successfully locate the correct borders. MSGVF is developed so that when the contour reaches equilibrium, the various forces resulting from the different energy terms are balanced. In addition, the smoothness constraint of image pixels is kept so that over- or under-segmentation can be reduced. Experimental results on publicly accessible datasets of dermoscopic and optic disc images demonstrate that the proposed method effectively detects the borders of the objects of interest. © 2013 Elsevier Inc. All rights reserved.

Number of references:52

Main heading:Image segmentation

Controlled terms:Partial differential equations

Uncontrolled terms:Contour - Energy functions - Gradient vector flow - Mean shift - Publicly accessible - Segmentation algorithms - Segmentation results - Smoothness constraints

Classification code:741.1 Light/Optics - 921.2 Calculus

DOI:10.1016/j.cviu.2012.11.015

Database:Compendex

Accession number:20131116108217

Title:Optical storage properties of different fulgides

Authors:Chao, Lumen (1); Menke, Neimule (1); Yao, Baoli (3); Lei, Ming (3); Wang, Yingli (3); Sun, Xiaoman (1); Chen, Yi (4)

Author affiliation:(1) School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, China; (2) Ordos College, Inner Mongolia University, Ordos, 017000, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (4) Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100101, China

Corresponding author:Menke, N.(py_menkenei@imu.edu.cn)

Source title:Advanced Materials Research

Abbreviated source title:Adv. Mater. Res.

Volume:660

Monograph title:Future Optical Materials and Circuit Design

Issue date:2013

Publication year:2013

Pages:24-29

Language:English

ISSN:10226680

ISBN-13:9783037856413

Document type:Conference article (CA)

Conference name:2012 International Conference on Future Optical Materials and Circuit Design, FOMCD 2012

Conference date:December 27, 2012 - December 28, 2012

Conference location:Xiamen, China

Conference code:95897

Sponsor:Hongkong Education Society

Publisher:Trans Tech Publications, P.O. Box 1254, Clausthal-Zellerfeld, D-38670, Germany

Abstract:As one kind of organic photochromic optical storage material, fulgides are well-known for their thermally irreversibility. In this paper, two kinds of new fulgide materials, like pyrrylfulgide/PMMA film and 3-indoly-benzylfulgimide/PMMA film are used as storage materials. Different kinds of optical storage properties, like photosensitive spectral range, light sensitivity, resolution, fatigue resistance and thermal stability of them are measured. The experimental results show that for pyrrylfulgide and 3-indoly-benzylfulgimide, their photosensitive spectral range were 500nm~780nm and 480nm~720nm respectively; their maximum absorption were at 626nm and 573nm respectively; under 633nm light excitation, their light reaction constants of bleaching process on the exciting light polarization direction were 1.4×10-3cm2/mJ and 2.89×10-3cm2/mJ respectively; their resolution were both higher than 1680 lines/mm; they can be recycled more than 33 times and 70 times respectively; at room temperature they can be stored for 12 months and 14 months respectively. And it is concluded that pyrrylfulgide and 3-indoly-benzylfulgimide show better application potential in the field of rewriteable optical storage. © 2013 Trans Tech Publications, Switzerland.

Number of references:10

Main heading:Photosensitivity

Controlled terms:Light sensitive materials - Photochromism

Uncontrolled terms:3-indoly-benzylfulgimide - Bleaching process - Fulgides - Light excitation - Optical Storage - Photochromic optical storage - Polarization direction - Pyrrylfulgide - Room temperature - Spectral range

Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems

DOI:10.4028/www.scientific.net/AMR.660.24

Database:Compendex

Accession number:20132416413136

Title:Approach for differential phase contrast imaging in x-ray microscopy

Authors:Liu, Zhenwei (1); Lin, Danying (2); Huang, Jianheng (2); Niu, Hanben (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics of CAS, Chinese Academy of Sciences, Xi'an 710119, China; (2) Key Laboratory of Optoelectronics Devices, Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen 518060, China

Source title:Optics Letters

Abbreviated source title:Opt. Lett.

Volume:38

Issue:11

Issue date:June 1, 2013

Publication year:2013

Pages:1990-1992

Language:English

ISSN:01469592

E-ISSN:15394794

CODEN:OPLEDP

Document type:Journal article (JA)

Publisher:Optical Society of America, 2010 Massachusetts Ave, NW, Washington, DC, DC 20036-1023, United States

Abstract:We propose a differential phase contrast imaging method in x-ray microscopy by utilizing a biased derivative filter, which is structurally similar to that used in visible optics, except that phase changes by the filter cannot be ignored in the x-ray range. However, it is demonstrated that the filter's phase retardation does not disturb its function of phase contrast imaging, and even enhances the signals to some extent. Theoretical formulations and corresponding numerical simulations show that the approach is capable of performing characteristic differential microscopic phase imaging with nanometer-scale resolution. Manageable parameters are also examined in detail for pursuing a high image quality. © 2013 Optical Society of America.

Number of references:7

Main heading:X rays

Controlled terms:X ray microscopes

Uncontrolled terms:Derivative filter - Differential phase contrast imaging - High image quality - Nanometer-scale resolution - Phase retardation - Phase-contrast imaging - Theoretical formulation - X ray microscopy

Classification code:741.3 Optical Devices and Systems - 932.1 High Energy Physics

DOI:10.1364/OL.38.001990

Database:Compendex

Accession number:20134917058169

Title:Research on microsphere array laser in circulating state pumped by LDA

Authors:Ding, Jianyong (1); Gui, Luo (2); Zhao, Pengfei (3); Peng, Bo (3); Wei, Wei (1)

Author affiliation:(1) School of Optoelectronic Engineering, Nanjing University of Posts and Telecommunications, Nanjing, Jiangsu 210023, China; (2) Joint Laboratory on High Power Laser and Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi 710119, China

Corresponding author:Ding, J.(ding.jianyong@163.com)

Source title:Zhongguo Jiguang/Chinese Journal of Lasers

Abbreviated source title:Zhongguo Jiguang

Volume:40

Issue:10

Issue date:October 2013

Publication year:2013

Article number:1002010

Language:Chinese

ISSN:02587025

CODEN:ZHJIDO

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:A novel laser gain medium, microsphere array cooled by refractive index-matched coolant, is presented in response to the thermal management of high-power solid-state lasers in this paper. Experiments on microsphere array lasers in circulating state are carried out. The emission spectra and flourescence decay curves are measured. Besides, the stable pulse output energy is achieved and its laser characteristics are studied. The maximum pulse energy of microsphere array laser with diameters of 2 mm and 4 mm are 30.2 mJ and 115.4 mJ, respectively at a repetition rate of 1 Hz, and the corresponding slope efficiencies are 4.6% and 16.2%, respectively. Output energy decreases as pumping frequency increases. Experimental results show that the microsphere array laser has relatively good thermal performance and thermal stability, and can be used in high-power laser systems.

Number of references:10

Main heading:Pumping (laser)

Controlled terms:Emission spectroscopy - Laser Doppler velocimeters - Lasers - Microspheres - Q switched lasers - Refractive index - Solid state lasers - Temperature control

Uncontrolled terms:Emission spectrums - High-power laser systems - High-power solid-state lasers - Laser characteristics - Laser diode pumping - Microsphere arrays - Slope efficiencies - Thermal Performance

Classification code:731.3 Specific Variables Control - 741.1 Light/Optics - 744 Lasers - 818 Rubber and Elastomers

DOI:10.3788/CJL201340.1002010

Database:Compendex

Accession number:20124515637915

Title:A photocatalytic reactor derived from microstructured polymer optical fiber preform

Authors:Li, Dongdong (1); Wang, Lili (2); Zhang, Gongjian (3)

Author affiliation:(1) Department of Electronic and Telecommunications Engineering, Xi'An University of Post and Telecommunications, Xi'an, 710121, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Information road 17, Xi'an, Shaanxi, 710119, China; (3) Chitose Institute of Science and Technology, Bibi 758-65, Chitose, Hokkaido, 0668655, Japan

Corresponding author:Li, D.(dongdong19821111@163.com)

Source title:Optics Communications

Abbreviated source title:Opt Commun

Volume:286

Issue:1

Issue date:January 1, 2013

Publication year:2013

Pages:182-186

Language:English

ISSN:00304018

CODEN:OPCOB8

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:This paper reports a novel photocatalytic reactor having 547 pieces of TiO<inf>2</inf> nanocrystal-film-modified capillaries, which is derived from a microstructured polymer optical fiber (MPOF) preform. The photocatalytic active TiO<inf>2</inf> nanocrystal film is obtained by microwave processing of the TiO<inf>2</inf> gel films in the MPOF preform. The MPOF preform not only plays a role as a light-transmitting media, also a TiO<inf>2</inf> supporting and waste-water pipe to supply for photocatalytic degradation of toxic organic solute. The photocatalytic reactor has so large surface area for TiO<inf>2</inf> loading that photodegradation efficiency is enhanced. As far as we know, the photocatalytic reactor based on the super-multi channels capillary waveguide arrays has not been reported before. © 2012 Elsevier B.V. All rights reserved.

Number of references:28

Main heading:Preforming

Controlled terms:Loading - Nanocrystals - Photodegradation - Polymers - Titanium dioxide - Water pipelines

Uncontrolled terms:Capillary waveguides - Gel films - Large surface area - Microstructured polymer optical fibers - Microstructured polymer optical fibers (mPOF) - Microwave processing - Multi-channel - Nanocrystal films - Organic solutes - Photo catalytic degradation - Photo-catalytic - Photocatalytic reactors - Photodegradation efficiency - Super-multi - TiO

Classification code:815.1 Polymeric Materials - 804.2 Inorganic Compounds - 761 Nanotechnology - 741.1 Light/Optics - 672 Naval Vessels - 535.2.2 Metal Forming Practice - 446.1 Water Supply Systems

DOI:10.1016/j.optcom.2012.08.092

Database:Compendex

Accession number:20133616698513

Title:Research on modeling and simulation of expert_PID controlled servo system based on MATLAB/S-function

Authors:Kang, Fei (1); Liang, Yan Bing (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechannics Chinese Academy of Sciences(CAS), Xi'an, Shaan Xi, China

Source title:Applied Mechanics and Materials

Abbreviated source title:Appl. Mech. Mater.

Volume:347-350

Monograph title:Instruments, Measurement, Electronics and Information Engineering

Issue date:2013

Publication year:2013

Pages:604-609

Language:English

ISSN:16609336

E-ISSN:16627482

Document type:Conference article (CA)

Conference name:2013 International Conference on Precision Mechanical Instruments and Measurement Technology, ICPMIMT 2013

Conference date:May 25, 2013 - May 26, 2013

Conference location:Shenyang, Liaoning, China

Conference code:99138

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:The paper elaborates Expert_PID controller applied in servo system. Illustrates an Sfunction construction method on complex control law. Designs an Expert_PID controller based on MATLAB/S-function and writes partial core code of Expert_PID controller. Establishes the simulink model of servo system based on Expert_PID control law, gets the simulation result. Compared with the traditional discrete PID control law, the result demonstrates that Expert_PID controller can obtain excellent control qulity. © 2013 Trans Tech Publications Ltd, Switzerland.

Number of references:8

Main heading:Three term control systems

Controlled terms:Computer simulation - Control theory - Electric control equipment - Models - Proportional control systems - Servomechanisms

Uncontrolled terms:Complex control - Construction method - Control laws - Expert_PID - Model and simulation - S-function - Simulation - Simulink modeling

Classification code:705 Electric Generators and Motors - 723.5 Computer Applications - 731.1 Control Systems - 732.1 Control Equipment - 902.1 Engineering Graphics

DOI:10.4028/www.scientific.net/AMM.347-350.604

Database:Compendex

Accession number:20134616986790

Title:Prediction of welding residual stress by using thermo-metallurgical-mechanical constitute model

Authors:Sun, Yu Jie (1); Lu, Yu (2); Xu, Jian (1); Shi, Chun Ming (1)

Author affiliation:(1) Northwest Institute of Mechanical and Electrical Engineering, Xianyang 712099, Shaanxi Province, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an 710119, Shaanxi Province, China

Source title:Advanced Materials Research

Abbreviated source title:Adv. Mater. Res.

Volume:834-836

Monograph title:Research in Materials and Manufacturing Technologies

Issue date:2013

Publication year:2013

Pages:791-794

Language:English

ISSN:10226680

ISBN-13:9783037859162

Document type:Conference article (CA)

Conference name:2013 3rd International Conference on Materials and Products Manufacturing Technology, ICMPMT 2013

Conference date:September 25, 2013 - September 26, 2013

Conference location:Guangzhou, China

Conference code:100757

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:The objective of this paper is to investigate the effects of solid-state phase transformation on welding residual stress in high stress low alloy steel. In this study, based on commercial finite element software, a sequentially coupled thermal, metallurgical, mechanical plane strain finite element model is developed. The main effort is to develop a series of subroutines which consider the heat transfer from welding arc and numerical implementation of a thermo-metallurgical-mechanical constitutes equation. The effectiveness of developed computational method is confirmed by a butt welding simulation. Simulation of butt welding demonstrates that the distribution pattern of longitudinal residual stresses perpendicular to weld centerline at the upper surface of weldment has two peaks and transformation plasticity has significant effect on the evolution of residual stress. © (2014) Trans Tech Publicutions, Switzerland.

Number of references:6

Main heading:Residual stresses

Controlled terms:Butt welding - Computer simulation - Finite element method - Industrial research - Manufacture - Metallurgy

Uncontrolled terms:Distribution patterns - Finite element software - Longitudinal residual stress - Numerical implementation - Solid state phase transformation - Transformation Plasticity - Welding residual stress - Welding simulation

Classification code:921.6 Numerical Methods - 901.3 Engineering Research - 723.5 Computer Applications - 538.2.1 Welding Processes - 537.1 Heat Treatment Processes - 531.1 Metallurgy - 421 Strength of Building Materials; Mechanical Properties

DOI:10.4028/www.scientific.net/AMR.834-836.791

Database:Compendex

Accession number:20133516678484

Title:Theoretical analysis of scanning spectral filter method for coherent intensity contrast enhancement in femtosecond laser system

Authors:Ma, Zai-Ru (1); Sui, Zhan (2); Zhou, Gui-Yong (1); Sun, Nian-Chun (3); Wang, Yi-Shan (4); Wang, Xiang-Lin (4); Zhang, Bin (2); Zhang, Rong-Zhu (3)

Author affiliation:(1) College of Physics and Chemistry, Xihua University, Chengdu 610064, China; (2) Research Center of Laser Fusion CAEP, Mianyang 621900, China; (3) College of Electronics Information, Sichuan University, Chengdu 610064, China; (4) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Xi'an 710119, China

Corresponding author:Sui, Z.(suizhan2011@yahoo.com.cn)

Source title:Wuli Xuebao/Acta Physica Sinica

Abbreviated source title:Wuli Xuebao

Volume:62

Issue:15

Issue date:August 5, 2013

Publication year:2013

Article number:154202

Language:Chinese

ISSN:10003290

CODEN:WLHPAR

Document type:Journal article (JA)

Publisher:Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing, 100190, China

Abstract:A scanning spectral filter method is proposed for improving the intensity contrast originating from the phase ripple in the femtosecond chains, which is made using the character that the instantaneous frequency varies with the time approximately linearly for the chirped pulse in the time-frequency domain. The scanning spectral filtering for reducing the pre-pulse and post-pulse intensity is analyzed in the time-frequency domain by using the short-time Fourier transformation method. Results show that the coherent intensity pulse contrast can be improved by 0.41F2 for the chirped pulse or the compressed pulse, and the transmission efficiency of the chirped pulse can exceed 90% when the synchronizing time of the jitter ranges from -2 ps to 2 ps and the chirp rate p from 0.9 C/T2 to 1.1C/T2. © Chinese Physical Society.

Number of references:26

Main heading:Scanning

Controlled terms:Fourier transforms - Frequency domain analysis

Uncontrolled terms:Coherent pulse - Femtosecond laser system - Fourier transformations - Instantaneous frequency - Short time fourier transformations - Spectral scanning - Transmission efficiency - Ultrafast optics

Classification code:741.3 Optical Devices and Systems - 921.3 Mathematical Transformations

DOI:10.7498/aps.62.154202

Database:Compendex

Accession number:20131316153574

Title:Stray light analysis of catadioptric infrared optical system with large field

Authors:Wang, Wenfang (1); Yang, Xiaoxu (1); Jiang, Kai (1); Mei, Chao (1); Li, Gang (1); Zhang, Hengjin (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Wang, W.(s09031@opt.cn)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:42

Issue:1

Issue date:January 2013

Publication year:2013

Pages:138-142

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:Stray light analysis in optical system is a key technology to ensure the system's quality. According to the definition of stray light, the sources of stray light in infrared optical system and the effect of stray light were pointed out in this paper. In view of stray light source, a structure of suppressing stray light was established. In order to reduce the internal radiation, reflective vanes were used. TracePro software was also used to build the system model and simulate analysis of the system. The results indicate that stray light is well suppressed, and the system's PST can achieve a level of 10-5-10-8. At the same time, the internal radiation energy that gets to imager can achieve a level of 10-10 W. So the system can achieve a clear image.

Number of references:9

Main heading:Optical systems

Controlled terms:Light sources - Stray light

Uncontrolled terms:Infrared optical systems - Internal radiation - Key technologies - PST - System models - System's quality - TracePro

Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems

Database:Compendex

Accession number:20134416940617

Title:Engineering analysis of non-uniform internal heat source in the thermocouple under the second boundary condition

Authors:Yang, Fanchao (1); Wang, Hongwei (3); Wang, Cailing (4); Hu, Binliang (1)

Author affiliation:(1) Laboratory of Spectral Imaging Technique, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100049, China; (3) The Scientific Research Department in Engineering University of APF, Xi'an 710086, China; (4) The School of Computer Science in Xi'an Shiyou University, Xi'an 710065, China

Corresponding author:Yang, F.(frankyang1987@126.com)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:42

Issue:SUPPL.1

Issue date:2013

Publication year:2013

Pages:30-33

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:The domestic and foreign scholars have done a lot of work of research on the principle and the cooling performance of thermoelectric cooler, but most of them neglect the micro thermal conditions and regard the thermocouple internal heat source as uniform distribution. In order to make the analysis results more accurate and suitable for engineering application, Joule heat was used as non-uniform internal heat source of thermocouple in this paper and one kind of analysis model was set up: the model was based on linear ordinary differential equation and met the conditions of using principle of superposition. Therefore, this paper proposed an engineering method to calculate the temperature and distribution of heat flow in thermocouple based on the shunt and superposition principle. At last this paper got the temperature and distribution of heat flow of thermocouple under the second boundary condition. By checking the results, this paper proves the correctness of the formula and provides a theoretical guidance for the further research and application of thermoelectric refrigeration technology.

Number of references:8

Main heading:Thermocouples

Controlled terms:Boundary conditions - Engineering research - Heat transfer - Ordinary differential equations - Thermoelectric equipment - Thermoelectric refrigeration - Thermoelectricity

Uncontrolled terms:Engineering applications - Internal heat source - Linear ordinary differential equations - Principle of superposition - Research and application - Second boundary condition - Superposition principle - Thermoelectric cooler

Classification code:615.4 Thermoelectric Energy - 641.2 Heat Transfer - 901.3 Engineering Research - 921 Mathematics - 921.2 Calculus - 944.5 Temperature Measuring Instruments

Database:Compendex

Accession number:20132016323538

Title:Monomode optical planar and channel waveguides in Yb3+-doped silicate glasses formed by helium ion implantation

Authors:Liu, Chun-Xiao (1); Cheng, Shu (3); Zhao, Jin-Hua (4); Li, Wei-Nan (2); Wei, Wei (2); Peng, Bo (2); Guo, Hai-Tao (2)

Author affiliation:(1) School of Electronic and Information Engineering, Hefei Normal University, Hefei 230601, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences (CAS), Xi'an 710119, China; (3) Changchun University of Science and Technology, Changchun 130022, China; (4) School of Science, Shandong Jianzhu University, Jinan 250101, China; (5) Key Laboratory for Organic Electronics and Information Displays (KLOEID), Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, Nanjing 210046, China

Corresponding author:Liu, C.-X.(cxliu0816@sina.com)

Source title:Optics and Laser Technology

Abbreviated source title:Opt Laser Technol

Volume:52

Issue date:2013

Publication year:2013

Pages:10-14

Language:English

ISSN:00303992

CODEN:OLTCAS

Document type:Journal article (JA)

Publisher:Elsevier Ltd, Langford Lane, Kidlington, Oxford, OX5 1GB, United Kingdom

Abstract:Optical planar and channel waveguides in Yb3+-doped silicate glasses are fabricated by triple-energy helium ion implantation at a total dose of 6.0×1016 ions/cm2. The dark mode spectroscopy of the planar waveguide was measured using a prism coupling arrangement. The near-field mode profiles of the planar and channel waveguide were obtained with an end-face coupling system. The refractive index profile was reconstructed by the intensity calculation method. The results indicate that a refractive index enhanced region as well as an optical barrier has been created after the beam process. After post-implantation treatment at 260 C for 1 h, the channel waveguides possessed a propagation loss of &sim;1.2 dB/cm. The acceptable guiding properties suggest that further waveguide lasers may be realized on the He-implanted Yb3+-doped silicate glass waveguides. © 2013 Elsevier Ltd. All rights reserved.

Number of references:25

Main heading:Plasma filled waveguides

Controlled terms:Glass - Ion implantation - Optical waveguides - Refractive index - Silicates - Waveguides - Ytterbium

Uncontrolled terms:Channel waveguide - Coupling systems - Dark mode spectroscopy - Guiding properties - Laser materials - Post-implantation - Refractive index profiles - Waveguide lasers

Classification code:932.1 High Energy Physics - 812.3 Glass - 812 Ceramics, Refractories and Glass - 741.1 Light/Optics - 714.3 Waveguides - 547.2 Rare Earth Metals - 414 Masonry Materials

DOI:10.1016/j.optlastec.2013.03.017

Database:Compendex

Accession number:20124615668436

Title:Special issue: Behaviours in video

Authors:Zhou, Huiyu (1); Yuan, Yuan (2); Du, Eliza Y (3); Yan, Pingkun (4)

Author affiliation:(1) The Institute of Electronics, Communications, and Information Technology (ECIT), Queen's University Belfast, Belfast BT3 9DP, United Kingdom; (2) School of Engineering and Applied Science, Aston University, Birmingham B4 7ET, United Kingdom; (3) Department of Electrical and Computer Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University Indianapolis (IUPUI), Indianapolis, IN 46202, United States; (4) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China

Corresponding author:Zhou, H.(h.zhou@ecit.qub.ac.uk)

Source title:Neurocomputing

Abbreviated source title:Neurocomputing

Volume:100

Issue date:January 16, 2013

Publication year:2013

Pages:1-2

Language:English

ISSN:09252312

E-ISSN:18728286

CODEN:NRCGEO

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

DOI:10.1016/j.neucom.2012.04.018

Database:Compendex

Accession number:20131616213296

Title:Development of the fabrication method for novel polymer imaging fiber

Authors:Kong, Depeng (1); Wang, Lili (1); He, Zhengquan (1); Chu, Jiurong (2); Li, Yulin (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi 710119, China; (2) Production and Application of Plastic Optical Fiber National and Local Engineering Laboratory, Sichuan Huiyuan Plastic Optical Fiber Co., Ltd., Chengdu, Sichuan 611230, China

Corresponding author:Wang, L.(liliwang@opt.ac.cn)

Source title:Zhongguo Jiguang/Chinese Journal of Lasers

Abbreviated source title:Zhongguo Jiguang

Volume:40

Issue:1

Issue date:January 2013

Publication year:2013

Article number:0105004

Language:Chinese

ISSN:02587025

CODEN:ZHJIDO

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:The fabrication method for novel polymer imaging fiber is developed. The theory of light propagation in fiber and fiber design is expatiated, which is the guide for developing imaging fiber. The material of polymethyl methacrylate (PMMA) is heated and extruded in a hexagon mold as microstructured fiber preform. The holes in it are filled with polystyrene (PS) fibers. It is the first preform used for heat-stretch and stack-fusion to form a second preform. Then the second preform is heat-stretched to obtain imaging fiber with diameter of 0.22 mm and single fiber diameter of 3 μm. It is ultrahigh resolution imaging fiber, by which the microscale of 10 μm can be discerned. The method of one-step stack is used to stack 7200 pieces of customized polymer fibers as the multicore imaging fiber preform. The customized fiber with diameter of 0.25 mm and coating thickness of 20 μm is fused together. The preform is heat-stretched to form imaging fiber of 2 mm diameter and 20 μm single fiber diameter. It is found that the dust adsorbed on the fiber face seriously affects fiber's structure and image quality.

Number of references:13

Main heading:Fibers

Controlled terms:Fabrication - Fiber optics - Filled polymers - Image reconstruction - Polymers - Polymethyl methacrylates - Polystyrenes - Preforming - Thickness measurement

Uncontrolled terms:Coating thickness - Fabrication method - Imaging fibers - Micro-scales - Microstructured fibers - Novel polymers - Polymer fiber - Ultrahigh resolution

Classification code:943.2 Mechanical Variables Measurements - 913.4 Manufacturing - 817 Plastics and Other Polymers: Products and Applications - 815.1.1 Organic Polymers - 951 Materials Science - 815.1 Polymeric Materials - 741.1.2 Fiber Optics - 741 Light, Optics and Optical Devices - 535.2.2 Metal Forming Practice - 812 Ceramics, Refractories and Glass

DOI:10.3788/CJL201340.0105004

Database:Compendex

Accession number:20134216869130

Title:Reconstructed image enhancement of digital holography in contourlet domain based on particle swarm optimization

Authors:Wu, Yiquan (1); Yin, Jun (1)

Corresponding author:Wu, Y.(nuaaimage@163.com)

Source title:Zhongguo Jiguang/Chinese Journal of Lasers

Abbreviated source title:Zhongguo Jiguang

Volume:40

Issue:8

Issue date:August 2013

Publication year:2013

Article number:0809002

Language:Chinese

ISSN:02587025

CODEN:ZHJIDO

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:Aiming at the problem of low contrast, blurred edges and textures, and speckle noise of reconstructed image in digital holography, an adaptive enhancement method for reconstructed image of digital holography in contourlet domain based on uniform searching particle swarm optimization is proposed. Median filtering algorithm is used to suppress speckle noise of the reconstructed image. After the contourlet decomposition, edge enhancement is performed for the band-pass directional subbands by a nonlinear gain function. While the coefficients of low-pass subbands are adjusted by the gain function based on a gray-scale transform and the local mean. The gray-scale transform aims to expand the dark areas of digital holographic image. The undetermined parameters are found by uniform searching particle swarm optimization. The fitness function takes into account the contrast, definition and peak signal-to-noise ratio of image. A large number of experimental results show that, compared with three existing enhancement methods, the proposed method can more effectively improve the contrast and definition of reconstructed image in digital holography, highlight edges and textures, and suppress speckle noise. As a result, the measurement accuracy of digital holography can be improved.

Number of references:22

Main heading:Image texture

Controlled terms:Computer generated holography - Holography - Image enhancement - Image reconstruction - Particle swarm optimization (PSO) - Speckle - Textures

Uncontrolled terms:Contourlet decompositions - Contourlet transform - Gray scale - Measurement accuracy - Median filtering algorithm - Peak signal-to-noise ratio - Reconstructed image - Speckle noise

Classification code:723 Computer Software, Data Handling and Applications - 741.1 Light/Optics - 743 Holography - 743.1 Holographic Techniques - 746 Imaging Techniques - 933 Solid State Physics

DOI:10.3788/CJL201340.0809002

Database:Compendex

Accession number:20131616213808

Title:Measurement of transmittance for highly transparent liquid

Authors:Wang, Jian (1); Wei, Jian-Ping (3); Yang, Bo (4); Gao, Zhi-Yang (4); Yang, Xue-Feng (1)

Author affiliation:(1) Department of Physics and Chemistry, Henan Polytechnic University, Jiaozuo 454000, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (3) Key Laboratory of Gas Geology and Gas Control, Henan Polytechnic University, Jiaozuo 454000, China; (4) School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China

Corresponding author:Wang, J.(jianwang@hpu.edu.cn)

Source title:Guangxue Jingmi Gongcheng/Optics and Precision Engineering

Abbreviated source title:Guangxue Jingmi Gongcheng

Volume:21

Issue:3

Issue date:March 2013

Publication year:2013

Pages:624-630

Language:Chinese

ISSN:1004924X

CODEN:GJGOF4

Document type:Journal article (JA)

Publisher:Chinese Academy of Sciences, 140 Renmin Street, Changchun, 130022, China

Abstract:This paper analyzes the reasons that the mistaken transmittance results are prone to occur in a highly transparent liquid measurement by employing a visible spectrophotometer in traditional methods. On the basis of the analysis results, two kinds of simple ways for measuring the transmittance of highly transparent liquid are proposed. One way is to fit both kinds of transparent faces of a colorimetric ware closely together, in which the film is formed with the pending liquid to be tested. This structure is known as the "liquid film reference cell". The other way is to fit the pending liquid into a 1 cm length colorimetric ware as the reference cell, and fill the pending liquid into a 2 cm length colorimetric ware as the sample cell. With the two methods, several kinds of common liquids are measured and almost identical results are obtained. Measurements show that the transmittances of measured liquids such as alcohol, water are all in 98%~100% at the visible light range. These ways eliminate the mistaken transmittance results and provide effective methods for the measurement of transparent liquid.

Number of references:12

Main heading:Colorimetry

Controlled terms:Color - Liquid films - Meteorological instruments - Spectrophotometers

Uncontrolled terms:Sample cell - Transmittance measurements - Transparent liquids - Visible light - Visible spectrophotometers

Classification code:443.2 Meteorological Instrumentation - 741.1 Light/Optics - 801 Chemistry - 931.2 Physical Properties of Gases, Liquids and Solids - 941.4 Optical Variables Measurements

DOI:10.3788/OPE.20132103.0624

Database:Compendex

Accession number:20135217140185

Title:Generation of high-energy and broadband terahertz radiation via coherent synthesis

Authors:Li, Shaopeng (1); Liu, Hongjun (1); Huang, Nan (1); Sun, Qibing (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics Technology, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science (CAS), Xi'an, 710119, China

Corresponding author:Liu, H.(liuhongjun@opt.ac.cn)

Source title:Journal of Physics B: Atomic, Molecular and Optical Physics

Abbreviated source title:J Phys B At Mol Opt Phys

Volume:46

Issue:24

Issue date:December 28, 2013

Publication year:2013

Article number:245402

Language:English

ISSN:09534075

E-ISSN:13616455

CODEN:JPAPEH

Document type:Journal article (JA)

Publisher:Institute of Physics Publishing, Temple Circus, Temple Way, Bristol, BS1 6BE, United Kingdom

Abstract:A new method for the generation of high-energy and broadband terahertz (THz) radiation via coherent synthesis from multiple optical rectifications has been proposed. It is found that the intensities of the synthesized THz pulse are proportional to the square of the number of optical rectification processes when the same nonlinear crystals are used, which provides a simple method for the scaling up of THz energies with a powerful femtosecond laser. This method presents the possibility for THz strong-field physics with this table-top THz source. Moreover, in order to ensure that all the spectral components of the THz pulses are coherently synthesized, the relative time delay among the pump pulses should be less than 0.22 T<inf>0</inf> (T<inf>0</inf> is the pump pulse width). © 2013 IOP Publishing Ltd.

Number of references:32

Main heading:Terahertz waves

Controlled terms:Optical pumping - Semiconductor quantum wells

Uncontrolled terms:Broadband terahertz - Nonlinear crystals - Optical rectification process - Optical rectifications - Pump pulse width - Relative time delays - Spectral components - Strong-field physics

Classification code:711 Electromagnetic Waves - 714.2 Semiconductor Devices and Integrated Circuits - 741.1 Light/Optics

DOI:10.1088/0953-4075/46/24/245402

Database:Compendex

Accession number:20141017419588

Title:Investigation of Bessel beam propagation in scattering media with scalar diffraction method

Authors:Zheng, Juanjuan (1); Yao, Baoli (1); Yang, Yanlong (1); Lei, Ming (1); Gao, Peng (1); Li, Runze (1); Yan, Shaohui (1); Dan, Dan (1); Ye, Tong (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) Department of Neurobiology, University of Alabama at Birmingham, Birmingham, AL 35294, United States

Corresponding author:Ye, T.(tongtye@gmail.com)

Source title:Chinese Optics Letters

Abbreviated source title:Chin. Opt. Lett.

Volume:11

Issue:11

Issue date:November 2013

Publication year:2013

Article number:112601

Language:English

ISSN:16717694

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:Bessel beam propagation in scattering media is simulated using the angular spectrum method combined with slice-by-slice propagation model. Generating Bessel beams with a spatial light modulator, which provides a means to adjust flexibly the parameters of the Bessel beam, allows us to validate the simulation results experimentally. The study reveals that the self-reconstructing length changes oppositely with the axicon angle (i.e., the larger the axicon angle, the shorter the self-reconstructing length). The radius of the incident beam has little influence on the self-reconstruction of the Bessel beam central lobe. © 2013 Chinese Optics Letters.

Number of references:27

Main heading:Geometrical optics

Controlled terms:Bessel functions - Computer simulation - Laser beams - Light modulators - Optical waveguides - Scattering - Spectrum analysis

Uncontrolled terms:Angular spectrum method - Bessel beam - Incident beams - Propagation modeling - Scalar diffraction - Scattering media - Self reconstruction - Spatial light modulators

Classification code:723.5 Computer Applications - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 744.8 Laser Beam Interactions - 921 Mathematics

DOI:10.3788/COL201311.112601

Database:Compendex

Accession number:20131216136120

Title:Dependence of ultra-short electron packet broadening on external electric field

Authors:Wang, Chao (1); Tian, Jinshou (1); Kang, Yifan (2); Li, Hao (1); Liu, Hulin (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) School of Science, Air Force Engineering University, Xi'an 710051, China; (3) Graduate University of the Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Wang, C.(gooodwang@foxmail.com)

Source title:Zhenkong Kexue yu Jishu Xuebao/Journal of Vacuum Science and Technology

Abbreviated source title:Zhenkong Kexue yu Jishu Xuebao

Volume:33

Issue:2

Issue date:February 2013

Publication year:2013

Pages:120-125

Language:Chinese

ISSN:16727126

CODEN:CKKSDV

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:Boersch effect of electron pulse broadening was modeled and analyzed, based on the existing results reported in literature. A theory to characterize the electron packet broadening was formulated, with the time dispersion characteristics as the major factor. The influence of the external electric field on the ultra-short electron packet broadening was evaluated, in the newly-developed theory. The results show that the external e-field, accelerating the electrons, suppresses the broadening; whereas the field, decelerating electrons, widens the broadening. In image-converter streak cameras and ultra-fast electron diffraction devices, there exist one non-equipotential and two known equi-potential regions: one situates in the vicinity of photocathode, the other lies behind the deflection plate. Our preliminary results are of much technological interest for design of high-performance electron gun, because significant time broadening originates from the transit of the photoelectron packet in the potential decreasing direction.

Number of references:15

Main heading:Electrons

Controlled terms:Electron guns

Uncontrolled terms:Boersch effects - Built-in fields - Electron pulse broadening - Equi-potential - External electric field - Major factors - Time dispersion - Time-resolved

Classification code:701.1 Electricity: Basic Concepts and Phenomena - 714.1 Electron Tubes

DOI:10.3969/j.issn.1672-7126.2013.02.04

Database:Compendex

Accession number:20134416940652

Title:Objective evaluation approach of color balance for colorful digital image

Authors:Guo, Huinan (1); Cao, Jianzhong (1); Zhou, Zuofeng (1); Zhu, Qing (1); Liu, Chen (1); Wang, Feng (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Guo, H.(s09068@opt.cn)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:42

Issue:SUPPL.1

Issue date:2013

Publication year:2013

Pages:214-218

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:Color performance of colorful digital image was an important parameter to measure the quality of video capture and display devices. Objective evaluation of color balance for input image plays a vital role for equipment selection, debug and calibration. For the inadequacies of existing color balance evaluation methods, a novel evaluation algorithm was proposed which based on color gamut description. In CIE1931xy standard color gamut, according to the constant hue trajectory and constant saturation trajectory, judge the color property of tristimulus color as well as determine the characteristic triangle of tristimulus color. By building color-barycenter model, carry out global description for color character of input image and evaluate the color balance by using the proposed evaluation function. Experimental results show that the proposed evaluation methods in line with the habits of human visual system, which can intuitively response to color stimulus effect for human visual system; meanwhile, it can evaluate colorful natural images accurately and objectively which was of good robustness and practical value.

Number of references:7

Main heading:Color

Controlled terms:Display devices - Function evaluation - Image processing - Optical engineering

Uncontrolled terms:Color balance - Color gamuts - Digital image - Equipment selection - Evaluation algorithm - Evaluation function - Human Visual System - Objective evaluation

Classification code:722.2 Computer Peripheral Equipment - 741 Light, Optics and Optical Devices - 741.1 Light/Optics - 921.6 Numerical Methods

Database:Compendex

Accession number:20130916050893

Title:Empirical mode decomposition based background removal and de-noising in polarization interference imaging spectrometer

Authors:Zhang, Chunmin (1); Ren, Wenyi (1); Mu, Tingkui (1); Fu, Lili (1); Jia, Chenling (1)

Corresponding author:Zhang, C.(zcm@mail.xjtu.edu.cn)

Source title:Optics Express

Abbreviated source title:Opt. Express

Volume:21

Issue:3

Issue date:February 11, 2013

Publication year:2013

Pages:2592-2605

Language:English

E-ISSN:10944087

Document type:Journal article (JA)

Publisher:Optical Society of America, 2010 Massachusetts Ave, NW, Washington, DC, DC 20036-1023, United States

Abstract:Based on empirical mode decomposition (EMD), the background removal and de-noising procedures of the data taken by polarization interference imaging interferometer (PIIS) are implemented. Through numerical simulation, it is discovered that the data processing methods are effective. The assumption that the noise mostly exists in the first intrinsic mode function is verified, and the parameters in the EMD thresholding de-noising methods is determined. In comparison, the wavelet and windowed Fourier transform based thresholding de-noising methods are introduced. The de-noised results are evaluated by the SNR, spectral resolution and peak value of the de-noised spectrums. All the methods are used to suppress the effect from the Gaussian and Poisson noise. The de-noising efficiency is higher for the spectrum contaminated by Gaussian noise. The interferogram obtained by the PIIS is processed by the proposed methods. Both the interferogram without background and noise free spectrum are obtained effectively. The adaptive and robust EMD based methods are effective to the background removal and de-noising in PIIS. © 2013 Optical Society of America.

Number of references:22

Main heading:Signal processing

Controlled terms:Data processing - Gaussian noise (electronic) - Interferometry - Polarization - Signal to noise ratio

Uncontrolled terms:Background removal - Data processing methods - De-noising - Denoising methods - Empirical Mode Decomposition - Gaussians - Interferograms - Intrinsic Mode functions - Peak values - Poisson noise - Polarization interferences - Thresholding - Windowed Fourier transforms

Classification code:711.1 Electromagnetic Waves in Different Media - 713 Electronic Circuits - 716 Telecommunication; Radar, Radio and Television - 716.1 Information Theory and Signal Processing - 723.2 Data Processing and Image Processing - 941.4 Optical Variables Measurements

DOI:10.1364/OE.21.002592

Database:Compendex

Accession number:20140317205676

Title:Adaptive distance regularized level set method and its application to image segmentation

Authors:Yu, Yali (1); Qu, Youshan (1); Han, Yameng (1); Tan, Jiahai (1)

Author affiliation:(1) Xi'an Institute of Optics and Precise Mechanics, Chinese Academy Sciences, Xi'an, China; (2) University of Chinese Academy Sciences, Beijing, China

Source title:Proceedings - 2013 5th International Conference on Intelligent Human-Machine Systems and Cybernetics, IHMSC 2013

Abbreviated source title:Proc. - Int. Conf. Intelligent Hum.-Mach. Syst. Cybern., IHMSC

Volume:1

Monograph title:Proceedings - 2013 5th International Conference on Intelligent Human-Machine Systems and Cybernetics, IHMSC 2013

Issue date:2013

Publication year:2013

Pages:388-391

Article number:6643911

Language:English

ISBN-13:9780769550114

Document type:Conference article (CA)

Conference name:2013 5th International Conference on Intelligent Human-Machine Systems and Cybernetics, IHMSC 2013

Conference date:August 26, 2013 - August 27, 2013

Conference location:Hangzhou, Zhejiang, China

Conference code:101433

Publisher:IEEE Computer Society, 2001 L Street N.W., Suite 700, Washington, DC 20036-4928, United States

Abstract:The distance regularized level set method has the advantage of maintaining the regularity of the level set function without re-initialization. However, it has the disadvantage of requiring the initial curve around or inside the detected objects. In this paper, an adaptive distance regularized level set method is designed. Firstly, the local energy term is introduced to make the method robust to how and where the initial curve is selected and can successfully segment the images with intensity heterogeneity. Secondly, a Gaussian filter is utilized to ensure the smoothness and regularity of the level set function and eliminate re-initialization. Furthermore, the narrow band method is applied in the adaptive distance regularized level set method to reduce the computation and the convergence time. The results of the comparative experiments show the advantages of the designed method. © 2013 IEEE.

Number of references:16

Main heading:Level measurement

Controlled terms:Cybernetics - Drop breakup - Image segmentation - Set theory - Stress intensity factors

Uncontrolled terms:Active contour model - Comparative experiments - Distance regularized level sets - Energy functions - Intensity heterogeneity - Level set functions - Level Set method - Narrow band methods

Classification code:943.2 Mechanical Variables Measurements - 931.2 Physical Properties of Gases, Liquids and Solids - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 741.1 Light/Optics - 731.1 Control Systems - 422 Strength of Building Materials; Test Equipment and Methods - 421 Strength of Building Materials; Mechanical Properties

DOI:10.1109/IHMSC.2013.99

Database:Compendex

Accession number:20134817040199

Title:Design and analysis of flexible support of the grating in space spectrometer

Authors:Liu, Qimin (1); Ruan, Ping (1); Li, Fu (1); Pan, Haijun (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Liu, Q.(qiminliu@126.com)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:42

Issue:9

Issue date:September 2013

Publication year:2013

Pages:2457-2461

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:In order to obtain high-stiffness and good thermal stability of main supporting structure in space remote sensor, a flexible support structure was proposed to solve the contradiction of force and thermal constraints availably, which are two key environmental constraints on the imaging of the grating spectrometer. Firstly, according to the optical design requirements, the structure of the grating blank was determined. Secondly, the sensitivity of the sizes of the flexible support was analyzed by theoretical calculation, and their effects on bend rigidity were obtained. Optimum design was utilized to determine the final sizes. Finally, the surface figure precision and dynamic stiffness of the grating component in the thermal-structural coupling state were analyzed with finite element analysis (FEA) software. Simulation results demonstrate that design of the grating blank and its flexible support structure is reasonable, which can meet the requirements of the space application and supply the reference for further study and application.

Number of references:8

Main heading:Spectrometers

Controlled terms:Finite element method - Ground supports - Optical design - Stiffness

Uncontrolled terms:Environmental constraints - Flexible supports - Grating - Optimum designs - Study and applications - Surface figure precision - Theoretical calculations - Thermal-structural coupling

Classification code:951 Materials Science - 921.6 Numerical Methods - 801 Chemistry - 741.1 Light/Optics - 483 Soil Mechanics and Foundations - 422 Strength of Building Materials; Test Equipment and Methods - 421 Strength of Building Materials; Mechanical Properties

Database:Compendex

Accession number:20131616218954

Title:Coexistence and evolution of bright pulses and dark solitons in a fiber laser

Authors:Wang, Leiran (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Wang, L.(lionking@opt.ac.cn)

Source title:Optics Communications

Abbreviated source title:Opt Commun

Volume:297

Issue date:June 15, 2013

Publication year:2013

Pages:129-132

Language:English

ISSN:00304018

CODEN:OPCOB8

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:Bright pulses and dark solitons coexisting and evolving in a fiber laser with strong normal dispersion have been observed. Experimental results show that there exists a transitional pulse regime with the pulse duty cycle of &sim;0.5 that connects the bright pulse and dark soliton regimes. On adjusting polarization states and pump power, the duty cycle of pulses varies so that the laser emits bright, transitional, and dark pulses alternately. It is found that dark solitons are composed of two antiphase square pulses with very large durations and duty cycles. The experimental observations reveal that the bright and dark solitons are not completely isolated from each other. This work could provide a new perspective to the understanding of bright and dark soliton formations as well as their transformations. © 2013 Elsevier B.V.

Number of references:45

Main heading:Solitons

Controlled terms:Dispersion (waves) - Fiber lasers - Laser mode locking - Optical pumping - Polarization

Uncontrolled terms:Bright pulse - Dark solitons - Experimental observation - Normal dispersion - Polarization state - Pulse duty cycle - Pulse regimes - Square pulse

Classification code:711.1 Electromagnetic Waves in Different Media - 741.1 Light/Optics - 741.1.2 Fiber Optics - 744.1 Lasers, General - 744.4 Solid State Lasers - 931.3 Atomic and Molecular Physics

DOI:10.1016/j.optcom.2013.02.009

Database:Compendex

Accession number:20134116840965

Title:Study on 2.0 μm fluorescence of Ho-doped water-free fluorotellurite glasses

Authors:He, Jianli (1); Zhan, Huan (1); Zhou, Zhiguang (1); Zhang, Aidong (1); Lin, Aoxiang (1)

Corresponding author:Lin, A.(aoxiang@opt.ac.cn)

Source title:Optical Materials

Abbreviated source title:Opt Mater

Volume:35

Issue:12

Issue date:October 2013

Publication year:2013

Pages:2573-2576

Language:English

ISSN:09253467

CODEN:OMATET

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:Ho3+-doped water-free fluorotellurite glasses with composition of 60TeO<inf>2</inf>-30ZnF<inf>2</inf>-10NaF (mol%, TZNF60) were made by using specially-designed physical and chemical dehydration technique. 2.04 μm fluorescence (Ho3+: 5I<inf>7</inf> → 5I<inf>8</inf>) was observed experimentally and presented in this paper: A broad bandwidth of &sim;149 nm, large simulated emission cross-section of 7.2 × 10-21 cm2, and the longest reported fluorescence lifetime of &sim;10 ms among all the reported Ho3+-doped oxide glasses. Thanks to the absence of OH groups and low phonon energy with the addition fluorides into tellurite oxide glasses, 1.00Ho-TZNF60 glass demonstrates the maximum figure of merit (σ<inf>em</inf> × τ<inf>f</inf>) of 7.13 × 10-27 m2 s, thus regarded as a promising optical material for the development of 2.0 μm fiber lasers. © 2013 Elsevier B.V. All rights reserved.

Number of references:28

Main heading:Glass

Controlled terms:Fiber lasers - Fluorescence - Holmium - Tellurium compounds

Uncontrolled terms:Broad bandwidths - Doped oxides - Fiber materials - Figure of merits - Fluorescence lifetimes - Fluoro-tellurite glass - Low phonon energies - Simulated emission

Classification code:547.2 Rare Earth Metals - 741.1 Light/Optics - 741.1.2 Fiber Optics - 804.1 Organic Compounds - 812.3 Glass

DOI:10.1016/j.optmat.2013.07.031

Database:Compendex

Accession number:201439072743

Title:Data uncertainty in face recognition

Authors:Xu, Yong (1); Fang, Xiaozhao (1); Li, Xuelong (3); Yang, Jiang (4); You, Jane (5); Liu, Hong (6); Teng, Shaohua (7)

Author affiliation:(1) Bio-Computing Research Center, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen, China; (2) Key Laboratory of Network Oriented Intelligent Computation, Shenzhen, China; (3) Center for Optical Imagery Analysis and Learning, State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Xi'an, Shaanxi, China; (4) School of Computer Science and Technology, Nanjing University of Science of Science and Technology, Nanjing, China; (5) Department of Computing, Hong Kong Polytechnic University, Kowloon, Hong Kong; (6) Engineering Laboratory on Intelligent Perception for Internet of Things, Shenzhen Graduate School, Peking University, Shenzhen, China; (7) Guangdong University of Technology, Guangzhou, China

Corresponding author:Xu, Yong

Source title:IEEE Transactions on Cybernetics

Abbreviated source title:IEEE Trans. Cybern.

Volume:44

Issue:10

Issue date:October 1, 2014

Publication year:2013

Pages:1950-1961

Article number:6729058

Language:English

ISSN:21682267

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:The image of a face varies with the illumination, pose, and facial expression, thus we say that a single face image is of high uncertainty for representing the face. In this sense, a face image is just an observation and it should not be considered as the absolutely accurate representation of the face. As more face images from the same person provide more observations of the face, more face images may be useful for reducing the uncertainty of the representation of the face and improving the accuracy of face recognition. However, in a real world face recognition system, a subject usually has only a limited number of available face images and thus there is high uncertainty. In this paper, we attempt to improve the face recognition accuracy by reducing the uncertainty. First, we reduce the uncertainty of the face representation by synthesizing the virtual training samples. Then, we select useful training samples that are similar to the test sample from the set of all the original and synthesized virtual training samples. Moreover, we state a theorem that determines the upper bound of the number of useful training samples. Finally, we devise a representation approach based on the selected useful training samples to perform face recognition. Experimental results on five widely used face databases demonstrate that our proposed approach can not only obtain a high face recognition accuracy, but also has a lower computational complexity than the other state-of-the-art approaches.

Number of references:45

Main heading:Computer vision

Controlled terms:Face recognition - Learning systems - Pattern recognition

Uncontrolled terms:Data uncertainty - uncertainty

Classification code:716 Telecommunication; Radar, Radio and Television - 723.5 Computer Applications - 731.5 Robotics

DOI:10.1109/TCYB.2014.2300175

Database:Compendex

Accession number:20141117464276

Title:Mode locked Er-doped f iber laser with single-wall carbon nanotube saturable absorber

Authors:Yu, Zhenhua (1); Song, Yanrong (1); Dong, Xinzheng (1); Tian, Jinrong (1); Wang, Yonggang (2)

Author affiliation:(1) Institute of Information Photonics Technology and College of Applied Sciences, Beijing University of Technology, Beijing 100124, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Song, Y.(yrsong@bjut.edu.cn)

Source title:Chinese Optics Letters

Abbreviated source title:Chin. Opt. Lett.

Volume:11

Issue:SUPPL.2

Issue date:2013

Publication year:2013

Article number:S21403

Language:English

ISSN:16717694

Document type:Journal article (JA)

Publisher:Science Press

Abstract:A mode locked Er-doped fiber laser based on a single-wall carbon nanotube saturable absorber is demonstrated. A high quality single-wall carbon nanotubes (SWCNTs) absorber film is fabricated by a polymer composite. The pulse duration is 488 fs with 9.6-nm spectral width at the center of 1564 nm. The repetition rate is 30.4 MHz. The maximum output power is 3 mW. And the single pulse energy is 0.1 nJ. © 2013 Chinese Optics Letters.

Number of references:22

Main heading:Carbon nanotubes

Controlled terms:Erbium - Fiber lasers - Locks (fasteners) - Q switched lasers - Saturable absorbers

Uncontrolled terms:Absorber films - Er-doped fiber laser - Maximum output power - Polymer composite - Pulse durations - Repetition rate - Single pulse energy - Spectral widths

Classification code:547.2 Rare Earth Metals - 601.3 Mechanisms - 744.1 Lasers, General - 744.4 Solid State Lasers - 761 Nanotechnology

DOI:10.3788/COL201311.S21403

Database:Compendex

Accession number:20141317501125

Title:An integrated all-optical encryption scheme for multi-wave 8x80Gbps signal based on LibNO3 waveguide

Authors:Duan, Jie (1); Wen, Yu (1); Duan, Tao (2); Xie, Xiaoping (1)

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8906

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Laser Communication Technologies and Systems

Issue date:2013

Publication year:2013

Article number:89060F

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497758

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:In order to realize the all-optical encryption for multi-wave and ultra-high speed, an all-optical encryption scheme is proposed, which is based on pockels effect of LiNbO3 waveguide and optical-time-division-multiplexing (OTDM) in LibNO3 waveguide. The coherently ultra-high speed plaintext and key are generated by OTDM in LibNO3 waveguide and the XOR operation of optical plaintext and key are achieved by direct light interference. The feasibility and validity of this scheme is verified by simulative experiment at 8 x 80Gbps with wavelength interval of 2nm. © 2013 Copyright SPIE.

Number of references:17

Main heading:Waveguides

Controlled terms:Cryptography

Uncontrolled terms:All-optical XOR gate - Encryption schemes - Interference effects - LiNbO3 wave-guide - Plaintext - Pockels effect - Ultra high speed - XOR operation

Classification code:714.3 Waveguides - 716 Telecommunication; Radar, Radio and Television - 717 Optical Communication - 718 Telephone Systems and Related Technologies; Line Communications - 723 Computer Software, Data Handling and Applications

DOI:10.1117/12.2032225

Database:Compendex

Accession number:20141317501136

Title:Experimental research of optical preamplifier receiver for RZ-DPSK based on delay interferometer

Authors:Zhang, Ke-Wei (1); Wang, Wei (1); Zhao, Wei (1); Xie, Xiao-Ping (1); Qian, Feng-Chen (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shanxi 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100049, China; (3) Xi'an Communication College, Xi'an, Shaanxi 710106, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8906

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Laser Communication Technologies and Systems

Issue date:2013

Publication year:2013

Article number:89060Q

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497758

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:We present simulation results for a 5 Gb/s optically pre-amplified, differential phase shift keying communication system achieving -48.1 dBm (about 24.7 photons/bit) receiver sensitivity at 10-9 bit-error-rate and using an optical delay line interferometer made by ourselves with 1 bit delay as the demodulator. The system is also experimental tested and sensitivity of the receiver is -36.5 dBm (about 106.6 photons/bit). The experimental results have some penalty in sensitivity comparing to the results in the simulation because the 1 bit delay interferometer is sensitive to the environment such as temperature, tremble and so on. To our knowledge if the interferometer is well designed and optimized, the experimental results can correspond with the simulative results and an optically pre-amplified direct detection DPSK receiver with high sensitivity can be realized. © 2013 Copyright SPIE.

Number of references:16

Main heading:Phase shift keying

Controlled terms:Interferometers - Optical communication

Uncontrolled terms:Delay interferometer - Differential phase-shift keying - Direct detection - Experimental research - High sensitivity - Optical delay lines - Optical pre-amplifiers - Receiver sensitivity

Classification code:716 Telecommunication; Radar, Radio and Television - 717.1 Optical Communication Systems - 941.3 Optical Instruments

DOI:10.1117/12.2032798

Database:Compendex

Accession number:20141317521648

Title:The application of auto-gated power supply in ICCD camera

Authors:Bai, Zhe (1); Zhang, Jian (1); Fan, Xue-Wu (1); Xiang, Shi-Ming (2)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an 710119, China; (2) Key Laboratory of Low Light Level Technology of COSTIND, Xi'an 710065, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8912

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Low-Light-Level Technology and Applications

Issue date:2013

Publication year:2013

Article number:89121H

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497819

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE); The Optical Society; European Optical Society; European Optical Society

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:Intensified CCD (ICCD) imagers have been widely used in low light level imaging system. While the ICCD has smaller dynamic range in ubiquity, and its output image is prone to saturation in high light level. In this paper, the auto-gated power supply method is put forward to implementing automatic brightness control (ABC). Consequently, the ICCD camera imaging dynamic range is improved. Firstly, the principle of the auto-gated power supply is described briefly, and the design scheme is carried out in detail. The pulse power control mode is adopted to the photocathode instead of the traditional high voltage DC power supply, and the analog adjustment mode is adopted to the micro channel plate (MCP). Secondly, an imaging experiment for ICCD camera was made to validate the auto-gated power supply design, and the experiment results are presented. The results indicated that the design is valid, and the auto-gated power supply method helps to improve the image quality of the ICCD camera. Finally, the key problems in the design are analyzed and summarized in detail. © 2013 SPIE.

Number of references:7

Main heading:Cameras

Controlled terms:Design - Image storage tubes - Imaging systems

Uncontrolled terms:ABC - Dynamic range - ICCD cameras - Low light level imaging - Power supply

Classification code:408 Structural Design - 714.1 Electron Tubes - 741 Light, Optics and Optical Devices - 742.2 Photographic Equipment - 746 Imaging Techniques

DOI:10.1117/12.2034761

Database:Compendex

Accession number:20132516429278

Title:Femtosecond laser multi-beam interference lithography anti-reflective microstructure on silicon surface

Authors:He, Feng-Tao (1); Zhou, Qiang (1); Yang, Wen-Zheng (3); Long, Xue-Wen (2); Bai, Jing (2); Cheng, Guang-Hua (2)

Author affiliation:(1) School of Electronic Engineering, Xi'an University of Post and Telecommunication, Xi'an 710121, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (3) Key Laboratory of Ultra-fast Photoelectric Diagnostics Technology of CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Cheng, G.-H.(gcheng@opt.ac.cn)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:42

Issue:5

Issue date:May 2013

Publication year:2013

Pages:515-520

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:In order to obtain uniform distribution silicon surface microstructure, a new method was proposed based on multi-beam interference lithography to relaise the controlling of the distribution character of the microstructure. Femtosecond laser multi-beam interference was formed by Spatial Light Modulator (SLM), and the uniform distribution multi-spots with the controllable period were generated. By using these multi-spots, the regular distribution concave structures were fabricated on silicon surface, and the distribution character and period was flexiblly controlled by shift the phase masks on SLM. The morphology and optical character of the microstructure were measured with Scanning Electron Microscopy (SEM) and spectrophotometer. Experimental results show that the close-packed concave structure with the period of about 3.3 μm can be fabricated on the silicon surface under special parameters (10× focusing lens, laser power of 25 mW, exposing time of 30 s) by loading the phase of 4-facet pyramid lens with the base angle of 2°; the formed structure shows good effect of anti-reflection; its transmission at the near infrared band of 1.2~2 μm enhances 11.5% in comparison with the polished silicon.

Number of references:14

Main heading:Silicon wafers

Controlled terms:Light modulators - Loading - Microstructure - Scanning electron microscopy - Silicon - Ultrashort pulses

Uncontrolled terms:Anti-reflective - Distribution character - Multibeam interferences - Regular distribution - Silicon surface microstructure - Single crystal silicon - Spatial light modulators - Uniform distribution

Classification code:951 Materials Science - 933 Solid State Physics - 744.1 Lasers, General - 741.3 Optical Devices and Systems - 741.1 Light/Optics - 712.1.1 Single Element Semiconducting Materials - 672 Naval Vessels

DOI:10.3788/gzxb20134205.0515

Database:Compendex

Accession number:20134016808221

Title:Large-scale networked multi-axis control solution using EtherCAT and soft logic

Authors:Cheng, Zhiyuan (1); Ma, Qing (2); Yan, Minqi (1); Zhang, Yu (1)

Author affiliation:(1) Xi'an institute of optics and precision mechanics of Chinese Academy of Sciences, Xi'an, 710119, China; (2) Xi'an University of Architecture and Technology, Xi'an, China

Corresponding author:Cheng, Z.(czy@opt.ac.cn)

Source title:Telkomnika - Indonesian Journal of Electrical Engineering

Abbreviated source title:Telkomnika Indonesian J. Elect. Eng.

Volume:11

Issue:9

Issue date:2013

Publication year:2013

Pages:5218-5223

Language:English

ISSN:23024046

E-ISSN:2087278X

Document type:Journal article (JA)

Publisher:Universitas Ahmad Dahlan, Jalan Kapas 9, Semaki, Umbul Harjo,, Yogiakarta, 55165, Indonesia

Abstract:Aiming at the deficiencies of the traditional multi-axis control solution such as complex networked structure, poor clustered-control feature and unsatisfactory engineering practicability, the paper firstly optimized the existing solution in networked fieldbus, controller model, engineering reliability and maintainability. Then it proposed a novel solution combined high speed real-time EtherCAT (Ethernet for control Automation Technology) fieldbus with soft logic controller. The new solution took advantage of extraordinary real-time performance of EtherCAT and made good use of powerful clustered-control architecture of soft logic controller. Thus the new solution is concise and effective to solve the Large-scale networked controlling problem of 1100 distributed motors. Compared with the traditional schemes, the engineering practice shows that the novel solution has the advantage of perfect real-time performance, powerful clustered-control capability, flexible and variable networked structure, excellent engineering practicability. The novel solution is worth using for reference in solve similar large-scale networked controlling problems. © 2013 Universitas Ahmad Dahlan.

Number of references:17

Main heading:Controllers

Controlled terms:Electrical engineering - Electronics engineering - Motion control

Uncontrolled terms:Control automation - Engineering practices - Engineering reliability - EtherCAT - Multi axis control - Networked structures - Real time performance - Soft logic

Classification code:732.1 Control Equipment - 731.3 Specific Variables Control - 718 Telephone Systems and Related Technologies; Line Communications - 717 Optical Communication - 716 Telecommunication; Radar, Radio and Television - 715 Electronic Equipment, General Purpose and Industrial - 714 Electronic Components and Tubes - 713 Electronic Circuits - 709 Electrical Engineering, General

DOI:10.11591/telkomnika.v11i9.3271

Database:Compendex

Accession number:20135217144593

Title:De-noising and enhancement for terahertz imaging

Authors:Xu, Limin (1); Fan, Wenhui (1); Liu, Jia (1)

Corresponding author:Xu, L.(19874253xulimin@163.com)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:42

Issue:10

Issue date:2013

Publication year:2013

Pages:2865-2870

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:Terahertz waves can be used as a tool of non-destruction detection and imaging for certain kinds of materials because of unique characteristics. Improvement of imaging quality is of great significance to the application of terahertz imaging system. Digital image processing is a very important solution to the enhancement of imaging quality. Based on terahertz transmission imaging experiments, investigation was made on the use of image de-noising and enhancement techniques in order to suppress the influence of experimental noise of the imaging system and ultra-short laser power jitter. The methods included spatial domain filtering, Gaussian smoothing, frequency -domain filtering and edge detection. Analysis on the choice of methods and the comparison of effects was also given. Results show that, through an integrated use of image de -noising and enhancement techniques, the definition and identifiability of terahertz images are improved enormously.

Number of references:10

Main heading:Image denoising

Controlled terms:Edge detection - Image enhancement - Image processing - Imaging systems

Uncontrolled terms:Domain filtering - Gaussian smoothing - Imaging quality - Non-destruction - Spatial-domain filtering - Terahertz imaging - Terahertz imaging systems - Terahertz transmission

Classification code:716 Telecommunication; Radar, Radio and Television - 716.1 Information Theory and Signal Processing - 741 Light, Optics and Optical Devices - 746 Imaging Techniques

Database:Compendex

Accession number:20134917048380

Title:The new design and veri cation based on the coordinate rotation digital computer

Authors:Li, Tiefeng (1); Ma, Caiwen (1); Li, Wenhua (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an 710119, China; (2) The Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Li, T.(litiefeng@opt.cn)

Source title:Journal of Information and Computational Science

Abbreviated source title:J. Inf. Comput. Sci.

Volume:10

Issue:16

Issue date:November 1, 2013

Publication year:2013

Pages:5225-5232

Language:English

ISSN:15487741

Document type:Journal article (JA)

Publisher:Binary Information Press, Flat F 8th Floor, Block 3, Tanner Garden, 18 Tanner Road, Hong Kong

Abstract:The Coordinate Rotation Digital Computer (CORDIC) is an effective convergence algorithm that is used to compute many trigonometric functions using shifts and additions. However, it is difficult to be completely implemented in Integrated Circuit (IC) field because the CORDIC has six complex operating modes. Currently the shortcoming of CORDIC in the IC field are the low precision and the long calculation time so that it can't meet the actual needs. To over this, a new CORDIC algorithm that mainly adopts the iteration and the Looking-up Table (LUT) is introduced in this paper, which not only supports circular, linear and hyperbolic trigonometric function but it also has the interruption and overflowing functions. Most important is that it has higher precision and faster calculation speed than the conventional design. For example, the calculation speed of new CORDIC is up to 120 MHz. Using this frequency, it takes about 40 clock cycles to finish a trigonometric calculation. Moreover, the random verification model is firstly applied in the process of CORDIC design, which may automatically verify the definition domains of all input data and quickly analyze the precision errors of the calculated results. Finally, the precision errors between the expected results and the actual results are fully recorded by the verification model. © 2013 Binary Information Press.

Number of references:12

Main heading:Iterative methods

Controlled terms:Algorithms - Design - Hyperbolic functions - Random errors - Verification

Uncontrolled terms:Co-ordinate rotation digital computers - Conventional design - CORDIC - CORDIC algorithms - Iteration - Precision - Trigonometric functions - Verification model

Classification code:408 Structural Design - 723.1 Computer Programming - 921 Mathematics - 921.6 Numerical Methods - 922 Statistical Methods

DOI:10.12733/jics20102430

Database:Compendex

Accession number:20130215877191

Title:Low-dose carbon-implanted planar waveguides in Er3+/Yb 3+ co-doped silicate glasses

Authors:Liu, Chun-Xiao (1); Peng, Bo (2); Wei, Wei (2); Cheng, Shu (4); Li, Wei-Nan (2); Guo, Hai-Tao (2); Shen, Yuan (1)

Author affiliation:(1) School of Electronic and Information Engineering, Hefei Normal University, Hefei 230601, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences (CAS), Xi'an 710119, China; (3) Key Laboratory for Organic Electronics and Information Displays (KLOEID), Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, Nanjing 210046, China; (4) Changchun University of Science and Technology, Changchun 130022, China

Corresponding author:Liu, C.-X.(cxliu0816@sina.com)

Source title:Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

Abbreviated source title:Nucl Instrum Methods Phys Res Sect B

Volume:295

Issue date:2013

Publication year:2013

Pages:85-88

Language:English

ISSN:0168583X

CODEN:NIMBEU

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:We report, for the first time to our knowledge, on the fabrication of planar waveguides in Er3+/Yb3+ co-doped silicate glasses by 6.0 MeV carbon implantation with a dose of 6.0 × 1014 ions/cm2. The guiding properties are measured by the prism-coupling and end-face coupling methods with a He-Ne beam. The refractive index profile of the planar waveguide is reconstructed by the reflectivity calculation method, which shows a typical "enhanced well + optical barrier" distribution. The micro-luminescence and Raman investigations reveal that the bulk features are not deteriorated significantly by the carbon implantation in the waveguide, exhibiting possible applications for integrated active photonic devices. © 2012 Elsevier B.V. All rights reserved.

Number of references:21

Main heading:Automobile manufacture

Controlled terms:Erbium - Fluorescence - Glass - Ion implantation - Optical waveguides - Planar waveguides - Silicates - Waveguides - Ytterbium

Uncontrolled terms:Carbon-implantation - Co-doped silicates - Coupling methods - Guiding properties - Low dose - Prism-coupling - Raman investigations - Refractive index profiles

Classification code:812.3 Glass - 812 Ceramics, Refractories and Glass - 741.1 Light/Optics - 932.1 High Energy Physics - 714.3 Waveguides - 547.2 Rare Earth Metals - 414 Masonry Materials - 662.1 Automobiles

DOI:10.1016/j.nimb.2012.11.010

Database:Compendex

Accession number:20135117116182

Title:Depth-aware image seam carving

Authors:Shen, Jianbing (1); Wang, Dapeng (1); Li, Xuelong (2)

Author affiliation:(1) Beijing Key Laboratory of Intelligent Information Technology, School of Computer Science, Beijing Institute of Technology, Beijing 100081, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi 710119, China

Source title:IEEE Transactions on Cybernetics

Abbreviated source title:IEEE Trans. Cybern.

Volume:43

Issue:5

Issue date:October 2013

Publication year:2013

Pages:1453-1461

Language:English

ISSN:21682267

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., 445 Hoes Lane / P.O. Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:Image seam carving algorithm should preserve important and salient objects as much as possible when changing the image size, while not removing the secondary objects in the scene. However, it is still difficult to determine the important and salient objects that avoid the distortion of these objects after resizing the input image. In this paper, we develop a novel depthaware single image seam carving approach by taking advantage of the modern depth cameras such as the Kinect sensor, which captures the RGB color image and its corresponding depth map simultaneously. By considering both the depth information and the just noticeable difference (JND) model, we develop an efficient JND-based significant computation approach using the multiscale graph cut based energy optimization. Our method achieves the better seam carving performance by cutting the near objects less seams while removing distant objects more seams. To the best of our knowledge, our algorithm is the first work to use the true depth map captured by Kinect depth camera for single image seam carving. The experimental results demonstrate that the proposed approach produces better seam carving results than previous content-aware seam carving methods. © 2013 IEEE.

Number of references:33

Main heading:Cameras

Controlled terms:Algorithms - Optimization

Uncontrolled terms:Depth camera - Energy optimization - Image retargeting - Saliency - Seam carving

Classification code:723 Computer Software, Data Handling and Applications - 742.2 Photographic Equipment - 921 Mathematics - 921.5 Optimization Techniques

DOI:10.1109/TCYB.2013.2273270

Database:Compendex

Accession number:20140817349992

Title:Auto-focus algorithm of digital camera based on optical flow estimation

Authors:Guo, Huinan (1); Cao, Jianzhong (1); Zhou, Zuofeng (1); Dong, Xiaokun (1); Liu, Qing (1); Ma, Nan (2)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) College of Science, Air Force University of Engineering, Xi'an 710051, China

Corresponding author:Guo, H.(s09068@opt.cn)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:42

Issue:12

Issue date:December 2013

Publication year:2013

Pages:3417-3422

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:Auto-Focus technique is a main approach to hunt clear images which plays an important role in digital camera application. According to several unknown target under complicated condition, a novel auto-focus algorithm was proposed based on optical flow estimation. By calculating the optical flow of each input frame, the moving targets in scene image were tested as well as according to the moving characteristic, the interested real target was judged. Brenner sharpness evaluation method was improved. Meanwhile the evaluation function was established using two dimensions edge-gradient information. The response sensitivity of evaluation function was also increased via nonlinear-gain coefficient the impact of noise on evaluation value was decreased. Experimental results show that the proposed method can distinguish the interested main target in 50 times depths of field of different targets and evaluate the definition of varied images with random noise in 0.02 variance value effectively. And it is of a good ability of robustness for different images, Brenner function improves the peak stability margin 1 to 4 times by the algorithm, and it can be easily achieved on hardware.

Number of references:8

Main heading:Function evaluation

Controlled terms:Algorithms - Digital cameras - Optical engineering - Optical flows - Video cameras

Uncontrolled terms:Auto-focus - Auto-focus algorithm - Brenner function - Evaluation function - Optical flow estimation - Response sensitivity - Sharpness evaluation - Stability margins

Classification code:723 Computer Software, Data Handling and Applications - 741 Light, Optics and Optical Devices - 741.1 Light/Optics - 742.2 Photographic Equipment - 921 Mathematics - 921.6 Numerical Methods

Database:Compendex

Accession number:20134416915414

Title:Diode-pumped Yb:YAG thin disk laser with a novel multi-pass pump and cooling arrangement

Authors:Song, Qiong Ge (1); Cheng, Guang Hua (1); Zhu, Jiang Feng (3)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) Graduate University of Chinese Academy of Sciences, Beijing, 100049, China; (3) School of Technical Physics, Xidian University, Xi'an 710071, China

Source title:Applied Mechanics and Materials

Abbreviated source title:Appl. Mech. Mater.

Volume:423-426

Monograph title:Applied Materials and Technologies for Modern Manufacturing

Issue date:2013

Publication year:2013

Pages:2074-2077

Language:English

ISSN:16609336

E-ISSN:16627482

ISBN-13:9783037858882

Document type:Conference article (CA)

Conference name:3rd International Conference on Applied Mechanics, Materials and Manufacturing, ICAMMM 2013

Conference date:August 24, 2013 - August 25, 2013

Conference location:Dalian, China

Conference code:100385

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:We demonstrate a Yb:YAG thin disk laser with multi-pass diode-pumped structure and direct water cooling device. In the pump system, four passes of the pump radiation are focused on the thin disk using a center-punched spherical lens. The thin disk serves as the window of a copper tank and is directly cooled with recycle water-contacted method. The thin disk laser has a low pump at the threshold of operation. We obtained 450 mW output power around 1030 nm in a simple F-P resonant cavity. © (2013) Trans Tech Publications, Switzerland.

Number of references:6

Main heading:Ytterbium

Controlled terms:Manufacture

Uncontrolled terms:Diode-pumped - Diode-pumping - Direct water cooling - Multi-pass - Pump radiation - Pump system - Spherical lens - Thin-disk lasers

Classification code:537.1 Heat Treatment Processes - 547.2 Rare Earth Metals

DOI:10.4028/www.scientific.net/AMM.423-426.2074

Database:Compendex

Accession number:20135117116102

Title:Intrinsic image decomposition using optimization and user scribbles

Authors:Shen, Jianbing (1); Yang, Xiaoshan (1); Li, Xuelong (2); Jia, Yunde (1)

Author affiliation:(1) Beijing Laboratory of Intelligent Information Technology, School of Computer Science, Beijing Institute of Technology, Beijing 100081, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Source title:IEEE Transactions on Cybernetics

Abbreviated source title:IEEE Trans. Cybern.

Volume:43

Issue:2

Issue date:April 2013

Publication year:2013

Pages:425-436

Language:English

ISSN:21682267

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., 445 Hoes Lane / P.O. Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:In this paper, we present a novel high-quality intrinsic image recovery approach using optimization and user scribbles. Our approach is based on the assumption of color characteristics in a local window in natural images. Ourmethod adopts a premise that neighboring pixels in a local window having similar intensity values should have similar reflectance values. Thus, the intrinsic image decomposition is formulated by minimizing an energy function with the addition of a weighting constraint to the local image properties. In order to improve the intrinsic image decomposition results, we further specify local constraint cues by integrating the user strokes in our energy formulation, including constant-reflectance, constant-illumination, and fixed-illumination brushes. Our experimental results demonstrate that the proposed approach achieves a better recovery result of intrinsic reflectance and illumination components than the previous approaches. © 2012 IEEE.

Number of references:41

Main heading:Reflection

Controlled terms:Lighting - Optimization

Uncontrolled terms:Color characteristics - Energy formulations - Energy optimization - Illumination components - Intrinsic images - Local constraints - Reflectance values - User scribbles

Classification code:707 Illuminating Engineering - 711 Electromagnetic Waves - 921.5 Optimization Techniques

DOI:10.1109/TSMCB.2012.2208744

Database:Compendex

Accession number:20132516425823

Title:Optical bistability in subwavelength compound metallic grating

Authors:Lu, H. (1); Liu, X.M. (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Source title:Optics Express

Abbreviated source title:Opt. Express

Volume:21

Issue:11

Issue date:June 3, 2013

Publication year:2013

Pages:13794-13799

Language:English

E-ISSN:10944087

Document type:Journal article (JA)

Publisher:Optical Society of America, 2010 Massachusetts Ave, NW, Washington, DC, DC 20036-1023, United States

Abstract:We have investigated the optical bistability behavior based on an electromagnetically induced reflection (EIR) effect in a compound metallic grating consisting of subwavelength slits and Kerr nonlinear nanocavities embedded in a metallic film. The theoretical and simulation results show that a narrow peak in the broad reflection dip possesses a red-shift with increasing the refractive index of coupled nanocavities. Importantly, we have obtained an obvious optical bistability with threshold intensity about ten times lower than that of metallic grating coated by nonlinear material. The results indicate that our structure may find excellent applications for nonlinear plasmonic devices, especially optical switches and modulators. © 2013 Optical Society of America.

Number of references:37

Main heading:Optical bistability

Controlled terms:Diffraction gratings - Refractive index

Uncontrolled terms:Metallic gratings - Nano-cavities - Nonlinear materials - Optical bistability behavior - Plasmonic devices - Sub-wavelength - Subwavelength slits - Threshold intensity

Classification code:741 Light, Optics and Optical Devices

DOI:10.1364/OE.21.013794

Database:Compendex

Accession number:20123615405962

Title:A FPGA-based real time QRS complex detection system using adaptive lifting scheme

Authors:Yu, Hang (1); Ma, Lixiao (1); Wang, Ru (1); Jiang, Lai (1); Li, Yan (1); Ji, Zhen (1); Pingkun, Yan (3); Fei, Wang (4)

Author affiliation:(1) College of Computer Science and Software Engineering, Shenzhen University, Shenzhen, China; (2) Shenzhen City Key Laboratory of Embedded System Design, Shenzhen University, Shenzhen, China; (3) OPTIMAL, Xi'an Institute of Optics and Precision Mechanics, Xi'an, China; (4) IBM Almaden Research Center, San Jose, CA 95120, United States

Corresponding author:Yu, H.

Source title:Lecture Notes in Electrical Engineering

Abbreviated source title:Lect. Notes Electr. Eng.

Volume:156 LNEE

Issue:VOL. 1

Monograph title:Recent Progress in Data Engineering and Internet Technology

Issue date:2013

Publication year:2013

Pages:497-504

Language:English

ISSN:18761100

E-ISSN:18761119

ISBN-13:9783642288067

Document type:Conference article (CA)

Conference name:International Conference on Data Engineering and Internet Technology, DEIT 2011

Conference date:March 15, 2012 - March 17, 2012

Conference location:Bali, Indonesia

Conference code:92428

Publisher:Springer Verlag, Tiergartenstrasse 17, Heidelberg, D-69121, Germany

Abstract:This paper presents a real time QRS wave detection system implemented using the FPGA. Based on the Adaptive Lifting Scheme, the digitized ECG sequence is directly processed in the spatial domain, thus greatly simplifies the system design and reduces the memory usage. In order to synchronize the input ECG sampling data and the FPGA based ALS system, a pipeline architecture interface is proposed. It works as a buffer and the ECG data is processed in a real time manner. The system is implemented on the XUPV5-LX110T evaluation platform, and validated by using ECG samples from the MIT-BTH Arrhythmia Database. Experimental results show that the system achieves 98.688% detection accuracy, while the dynamic power consumption is only ~20mW. © 2013 Springer-Verlag GmbH.

Number of references:10

Main heading:Wavelet transforms

Controlled terms:Complexation - Electrocardiography - Field programmable gate arrays (FPGA) - Internet

Uncontrolled terms:Adaptive lifting schemes - Detection accuracy - Dynamic power consumption - ECG data - Evaluation platforms - Memory usage - Pipeline architecture - QRS complex detection - QRS detection - Real time - Sampling data - Spatial domains - Wave detection

Classification code:802.2 Chemical Reactions - 723 Computer Software, Data Handling and Applications - 721.3 Computer Circuits - 921.3 Mathematical Transformations - 718 Telephone Systems and Related Technologies; Line Communications - 716 Telecommunication; Radar, Radio and Television - 701.1 Electricity: Basic Concepts and Phenomena - 717 Optical Communication

DOI:10.1007/978-3-642-28807-4_69

Database:Compendex

Accession number:20133916791725

Title:Synthesis and photovoltaic properties of an alternating polymer based fluorene and fluorine substituted quinoxaline derivatives

Authors:Wu, Haimei (1); Qu, Bo (3); Tian, Di (1); Cong, Zhiyuan (1); Gao, Bowen (4); Liu, Jianqun (1); An, Zhongwei (1); Gao, Chao (1); Xiao, Lixin (3); Chen, Zhijian (3); Gong, Qihuang (3); Wei, Wei (2)

Author affiliation:(1) Xi'An Modern Chemistry Research Institute, Xi'an Shaanxi 710065, China; (2) Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210003, China; (3) State Key Laboratory for Artificial Microstructures and Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871, China; (4) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science (CAS), Xi'an Shaanxi 710119, China

Corresponding author:Qu, B.(bqu@pku.edu.cn)

Source title:Reactive and Functional Polymers

Abbreviated source title:React Funct Polym

Volume:73

Issue:11

Issue date:2013

Publication year:2013

Pages:1432-1438

Language:English

ISSN:13815148

CODEN:RFPOF6

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:An alternating polymer (PFOFTQx) with 9,9-dioctylfluorene (FO) as electron-rich unit and fluorine substituted quinoxaline (FTQx) as electron-withdrawing unit was synthesized and characterized. PFOFTQx showed similar absorption property with that of the counterpart polymer without fluorine atom (synthesized APFO-15). However, the low-lying highest occupied molecular orbit (HOMO) energy level of PFOFTQx was -5.37 eV, about 0.07 eV smaller than that of synthesized APFO-15. In order to study the photovoltaic properties of the materials, polymer solar cells (PSCs) were fabricated with PFOFTQx as donor blended with [6,6]-phenyl-C61-butyric acid methyl ester (PC<inf>61</inf>BM) as acceptor. The power conversion efficiency (PCE) of PSC was 1.77% with a high open-circuit voltage (V<inf>oc</inf>) of 0.90 V for an optimized PFOFTQx:PC<inf>61</inf>BM weight ratio of 1:5, in comparison with that of synthesized APFO-15-based device (PCE of 1.60% with V<inf>oc</inf> of 0.77 V). This study indicated that fluorine substituted quinoxaline-based polymers would be promising material with a higher V<inf>oc</inf> for the application in polymer solar cells. © 2013 Elsevier Ltd. All rights reserved.

Number of references:29

Main heading:Polymers

Controlled terms:Electron energy levels - Fluorine - Materials properties - Open circuit voltage - Solar cells

Uncontrolled terms:[6 ,6]-phenyl-C61-butyric acid methyl esters - Fluorenes - Highest occupied molecular orbit - Polymer solar cell (PSCs) - Polymer Solar Cells - Power conversion efficiencies - Quinoxaline derivatives - Quinoxalines

Classification code:932 High Energy Physics; Nuclear Physics; Plasma Physics - 815.1 Polymeric Materials - 804 Chemical Products Generally - 933 Solid State Physics - 701.1 Electricity: Basic Concepts and Phenomena - 423 Non Mechanical Properties and Tests of Building Materials - 421 Strength of Building Materials; Mechanical Properties - 615.2 Solar Power

DOI:10.1016/j.reactfunctpolym.2013.07.015

Database:Compendex

Accession number:20133816755719

Title:A two-dimensional linear array fiber amplifier based on the MOPA configuration

Authors:Niu, L.Q. (1); Gao, C.X. (1); He, H.D. (1); Feng, L. (1); Cao, Z.Y. (1); Sun, C.D. (1); Zhu, S.L. (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Source title:Laser Physics

Abbreviated source title:Laser Phys.

Volume:23

Issue:9

Issue date:September 2013

Publication year:2013

Article number:095103

Language:English

ISSN:1054660X

E-ISSN:15556611

Document type:Journal article (JA)

Publisher:Institute of Physics Publishing, Temple Circus, Temple Way, Bristol, BS1 6BE, United Kingdom

Abstract:A two-dimensional linear array fiber amplifier based on the master oscillator power amplifier (MOPA) configuration is constructed and employed as the laser source of a high resolution 3D imaging LIDAR system. Each branch of the linear array system comprises a dual-stage Yb3+-doped large-mode-area double-clad fiber amplifier. The amplified pulse is of 2.3 ns temporal duration and 30 kHz repetition rate with an average power of 8.5 W when the pump power is 20 W. The optical-optical conversion efficiency is 41.8%. Furthermore, the SRS effect can be suppressed effectively. The M2 values of the output beam are 1.35 and 1.33 in the x- and y-axis directions, respectively. © 2013 Astro Ltd.

Number of references:21

Main heading:Fiber amplifiers

Controlled terms:Amplifiers (electronic) - Imaging systems - Optical phase conjugation - Optical pumping - Q switched lasers - Two dimensional

Uncontrolled terms:Double clad fibers - High resolution - Large mode area - Master oscillator power amplifiers - MOPA configuration - Optical-optical conversion efficiency - Repetition rate - Temporal durations

Classification code:713.1 Amplifiers - 741 Light, Optics and Optical Devices - 744.1 Lasers, General - 744.4 Solid State Lasers - 746 Imaging Techniques - 902.1 Engineering Graphics

DOI:10.1088/1054-660X/23/9/095103

Database:Compendex

Accession number:20140717299193

Title:Output performance of gain guided and index antiguided fiber lasers pumped by different methods

Authors:Zhu, Yonggang (1); Duan, Kailiang (1); Zhao, Baoying (1); Yang, Hening (1); Zhang, Entao (1); Zhao, Wei (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China

Corresponding author:Zhu, Y.(ygzhu@opt.ac.cn)

Source title:Proceedings - 2013 Wireless and Optical Communications Conference, WOCC 2013

Abbreviated source title:Proc. - Wirel. Opt. Commun. Conf., WOCC

Monograph title:Proceedings - 2013 Wireless and Optical Communications Conference, WOCC 2013

Issue date:2013

Publication year:2013

Pages:486-490

Article number:6676416

Language:English

ISBN-13:9781467356992

Document type:Conference article (CA)

Conference name:22nd Wireless and Optical Communications Conference, WOCC 2013

Conference date:May 16, 2013 - May 18, 2013

Conference location:Chongqing, China

Conference code:102423

Publisher:IEEE Computer Society, 2001 L Street N.W., Suite 700, Washington, DC 20036-4928, United States

Abstract:The output performance of Yb3+ doped gain guided and index antiguided (GG-IAG) fiber lasers pumped by different methods are compared by numerically solving rate equations (REs) with additional leakage losses. Three pump models, including forward pump, backward pump and bidirectional pump are established combined with REs model. Calculation results show that the output powers and slope efficiencies of GG-IAG fiber from high to low under the same condition are obtained by bidirectional pump, backward pump and forward pump in sequence. The upper energy level particle population density N<inf>2</inf>(z) and thermal distribution along the fiber generated by bidirectional pump are more uniform than that by other two pump methods. It benefits the lasing of GG-IAG fiber most. © 2013 IEEE.

Number of references:20

Main heading:Fiber lasers

Controlled terms:Optical communication - Population statistics

Uncontrolled terms:Calculation results - Gain guided - Index antiguided - Output performance - Particle population - Rate equations - Slope efficiencies - Thermal distributions

Classification code:717.1 Optical Communication Systems - 741.1.2 Fiber Optics - 922.2 Mathematical Statistics

DOI:10.1109/WOCC.2013.6676416

Database:Compendex

Accession number:20135017076706

Title:3D prostate MR image segmentation: A multi-task approach

Authors:Liu, Yin (1); Yuan, Yuan (1); Lu, Xiaoqiang (1)

Author affiliation:(1) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China; (2) Graduate University, Chinese Academy of Science, 19A Yuquanlu, Beijing, 100049, China

Source title:2013 IEEE China Summit and International Conference on Signal and Information Processing, ChinaSIP 2013 - Proceedings

Abbreviated source title:IEEE China Summit Int. Conf. Signal Inf. Process., ChinaSIP - Proc.

Monograph title:2013 IEEE China Summit and International Conference on Signal and Information Processing, ChinaSIP 2013 - Proceedings

Issue date:2013

Publication year:2013

Pages:193-196

Article number:6625326

Language:English

ISBN-13:9781479910434

Document type:Conference article (CA)

Conference name:2013 IEEE China Summit and International Conference on Signal and Information Processing, ChinaSIP 2013

Conference date:July 6, 2013 - July 10, 2013

Conference location:Beijing, China

Conference code:101067

Sponsor:The Institute of Electrical and Electronics Engineers Signal Processing Society (IEEE SPS)

Abstract:Multi-atlas based approaches are effective for the medical image segmentation. The strategy of assigning weights for the atlases is critically important to the segmentation performance. Previous works either assign weights on the image level or assign weights of different regions independently, i.e., they can't employ the uniqueness of each region and the connectivity among different regions simultaneously. In this paper, a multi-task approach is proposed to reduce this drawback. To exploit the unique characteristic of each region, learning the segmentation result for each region is viewed as a single task. The weighted voting decision for each regions are made individually. To model the connectivity among different regions or tasks, a norm regularization term is introduced to refine the segmentation results made by each individual tasks. By this way, the proposed approach simultaneously exploits the unique character of each region and the connectivity among them. The proposed approach is tested on 60 3D prostate magnetic resonance (MR) images from 60 patients. Experiment results show that the proposed approach is comparative to or even superior to the state-of-the-art approaches for the prostate segmentation. © 2013 IEEE.

Number of references:7

Main heading:Three dimensional

Controlled terms:Data processing - Image segmentation - Magnetic resonance - Magnetic resonance imaging - Medical image processing - Medical imaging - Urology

Uncontrolled terms:MR images - multi-atlas - Prostate segmentation - Regularization terms - Segmentation performance - Segmentation results - State-of-the-art approach - Weighted voting

Classification code:461.6 Medicine and Pharmacology - 701.2 Magnetism: Basic Concepts and Phenomena - 723.2 Data Processing and Image Processing - 723.5 Computer Applications

DOI:10.1109/ChinaSIP.2013.6625326

Database:Compendex

Accession number:20131316153564

Title:Laser beam wave-front error reduction accuracy analysis

Authors:Zhao, Jianke (1); Li, Xia (1); Xu, Liang (1); Duan, Yaxuan (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Zhao, J.(zjk@opt.ac.cn)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:42

Issue:1

Issue date:January 2013

Publication year:2013

Pages:79-83

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:In the laser parameters systems of big science projects, the installation errors of the shrink-beam system were analyzed. The result shows that the defocus between the objective lens system and the eyepiece system affects the wavefront distortion error of the system most. Besides, the PV values of the wavefront aberration caused by the defocus between the objective lens system and the eyepiece system of the shrink-beam system were analyzed and a conclusion that there was a non-linear relationship between the PV values and the defocus was drawn. By the test system composed of large aperture long focal length collimator, fiber lasers and Hartmann wavefront sensors, the wavefront aberration of the laser shrink-beam system was measured and verified real-time. The result shows that by wavefront computer-aided technology, the PV values of wavefront aberration can be less than 0.2λ (λ=1.053 μm).

Number of references:10

Main heading:Wavefronts

Controlled terms:Aberrations - Fiber lasers - Optical instrument lenses - Sensors

Uncontrolled terms:Computer-aided technologies - Hartmann sensors - Hartmann wave front sensors - Laser parameters - Non-linear relationships - Shrink-beam system - Wavefront aberrations - Wavefront distortion

Classification code:711 Electromagnetic Waves - 741 Light, Optics and Optical Devices - 801 Chemistry

Database:Compendex

Accession number:20130916060636

Title:Design and experiment of momentum balance wheels for optoelectric tracking gimbals

Authors:Li, Zhi-Guo (1); Gao, Li-Min (1); Zhang, Bo-Ni (3); Cui, Kai (2); Wang, Zhen-Yu (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100039, China; (3) Xi'an Institute of Applied Optics, Xi'an 710065, China

Corresponding author:Li, Z.-G.(lzg@opt.ac.cn)

Source title:Guangxue Jingmi Gongcheng/Optics and Precision Engineering

Abbreviated source title:Guangxue Jingmi Gongcheng

Volume:21

Issue:1

Issue date:January 2013

Publication year:2013

Pages:62-68

Language:Chinese

ISSN:1004924X

CODEN:GJGOF4

Document type:Journal article (JA)

Publisher:Chinese Academy of Sciences, 140 Renmin Street, Changchun, 130022, China

Abstract:A balance wheel to offset output torques and momentums of the gimbals during working was researched to eliminate the influence of movement of an optoelectronic tracking system on the satellite attitude. The balance wheels used in gimbals based on satellites are characterized by starting frequently, changing extensively in velocity and acceleration, and passing zero of velocity, which are quite different from that used to control satellite attitude. Therefore, a new balance wheel was designed based on angular momentum balance principle to meet the requirements of optoelectronic tracking gimbals for acquiring and tracking targets. The model and structure of the balance wheel were analyzed and optimized by finite element methods. Then an electromechanical dynamic model for describing the dynamic characteristics of optoelectronic tracking gimbals with the balance wheels was established, and the simulation for an azimuth rotor was researched by Matlab/Simulink and the reasonable results were presented. To verify the feasibility, a model prototype was developed. Then the experiment method based on an air bearing table was presented and the residual angular momentum was tested. Analysis and test results show that the residual angular momentum has reduced by 96%. The research verifies that the balance wheel can satisfy the application requirements of satellites.

Number of references:14

Main heading:Flywheels

Controlled terms:Angular momentum - Bearings (machine parts) - Experiments - Finite element method - Navigation

Uncontrolled terms:Air bearing tables - Balance wheels - Momentum balances - Opto-electronic tracking - Satellite attitude

Classification code:601.1 Mechanical Devices - 601.2 Machine Components - 716.3 Radio Systems and Equipment - 901.3 Engineering Research - 921.6 Numerical Methods - 931.1 Mechanics

DOI:10.3788/OPE.20132101.0062

Database:Compendex

Accession number:20131116108214

Title:Two-photon absorption photochromic optical image storage in indoly-benzylfulgimide/PMMA film

Authors:Sun, Xiaoman (1); Menke, Neimule (1); Yao, Baoli (3); Lei, Ming (3); Wang, Yingli (3); Chao, Lumen (1); Chen, Yi (4)

Author affiliation:(1) School of Physical Science and Technology, Inner Mongolia University, Hohhot, 010021, China; (2) Ordos College, Inner Mongolia University, Ordos, 017000, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710068, China; (4) Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100101, China

Corresponding author:Menke, N.(py_menkenei@imu.edu.cn)

Source title:Advanced Materials Research

Abbreviated source title:Adv. Mater. Res.

Volume:660

Monograph title:Future Optical Materials and Circuit Design

Issue date:2013

Publication year:2013

Pages:10-14

Language:English

ISSN:10226680

ISBN-13:9783037856413

Document type:Conference article (CA)

Conference name:2012 International Conference on Future Optical Materials and Circuit Design, FOMCD 2012

Conference date:December 27, 2012 - December 28, 2012

Conference location:Xiamen, China

Conference code:95897

Sponsor:Hongkong Education Society

Publisher:Trans Tech Publications, P.O. Box 1254, Clausthal-Zellerfeld, D-38670, Germany

Abstract:As one kind of organic photochromic optical storage material, fulgides are well-known for their thermally irreversibility. The two-photon absorption 3D optical storage technology is one of the hot research topics in the field of high-density information storage. Using optical image storage technology the recording and reading rates can be improved. In this paper, it's found that in one kind of 3-indoly-benzylfulgimide/PMMA film, there exits two-photon absorption property. And depending on this property, the two-photon absorption photochromic optical image storage was realized in an indoly-benzylfulgimide/PMMA film. It is proved that the N-benzyl-1,3,4-trimethyl-2- (2-methyl-) indoly-fulgimide has potential application in the two-photon absorption 3D optical storage. © (2013) Trans Tech Publications, Switzerland.

Number of references:8

Main heading:Luminescence of organic solids

Controlled terms:Light absorption - Optical image storage - Optical materials - Photochromism - Three dimensional computer graphics - Two photon processes

Uncontrolled terms:3D optical storages - Fulgides - Hot research topics - Indoly-benzylfulgimide - Photochromic - Photochromic optical storage - Potential applications - Reading rate - Two-photon absorptions

Classification code:723.5 Computer Applications - 741.1 Light/Optics - 741.3 Optical Devices and Systems

DOI:10.4028/www.scientific.net/AMR.660.10

Database:Compendex

Accession number:20132916502859

Title:Formation of nanogratings in a transparent material with tunable ionization property by femtosecond laser irradiation

Authors:Umran, Fadhil A. (1); Liao, Yang (2); Elias, Mazin M. (1); Sugioka, Koji (3); Stoian, Razvan (4); Cheng, Guanghua (5); Cheng, Ya (2)

Author affiliation:(1) Institute of Laser for Post Graduate Studies, Baghdad University, Baghdad, Iraq; (2) State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China; (3) Laser Technology Laboratory, RIKEN - Advanced Science Institute, Hirosawa 2-1, Wako, Saitama 351-0198, Japan; (4) Laboratoire Hubert Curien, UMR 5516 CNRS, Universite Jean Monnet, 42000 Saint Etienne, France; (5) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, CAS, Xi'an 710119, Shaanxi, China

Source title:Optics Express

Abbreviated source title:Opt. Express

Volume:21

Issue:13

Issue date:July 1, 2013

Publication year:2013

Pages:15259-15267

Language:English

E-ISSN:10944087

Document type:Journal article (JA)

Publisher:Optical Society of America, 2010 Massachusetts Ave, NW, Washington, DC, DC 20036-1023, United States

Abstract:Irradiation inside some transparent materials such as fused silica can induce nanograting structures at the focal area. Here, we investigate experimentally how the nanograting formation can be influenced by tuning the ionization property of the transparent material, which is achieved by irradiation inside a porous glass immersed in water doped with NaCl at variable concentrations. Our results show that the doping of NaCl not only reduces the threshold fluence of optical breakdown, but also leads to nanograting structures with shorter periods. These effects may be attributed to the enhanced photoionization in water doped with NaCl. © 2013 Optical Society of America.

Number of references:26

Main heading:Ionization of liquids

Controlled terms:Fused silica - Irradiation

Uncontrolled terms:Nano-grating structures - Nano-gratings - Nanograting - Optical breakdown - Porous glass - Threshold fluences - Transparent material - Variable concentration

Classification code:711.1 Electromagnetic Waves in Different Media - 802.2 Chemical Reactions - 812.3 Glass

DOI:10.1364/OE.21.015259

Database:Compendex

Accession number:20135217144964

Title:Design of athermal and bifocal infrared lens for space camera

Authors:Wang, Hu (1); Luo, Jianjun (1)

Author affiliation:(1) School of Astronautics, Northwestern Polytechnical University, Xi'an 710072, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Luo, J.(jjluo@nwpu.edu.cn)

Source title:Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams

Abbreviated source title:Qiangjiguang Yu Lizishu

Volume:25

Issue:10

Issue date:2013

Publication year:2013

Pages:2511-2516

Language:Chinese

ISSN:10014322

CODEN:QYLIEL

Document type:Journal article (JA)

Publisher:Editorial Office of High Power Laser and Particle Beams, P.O. Box 919-805, Mianyang, 621900, China

Abstract:A new kind of optical lens with light weight, compact structure, good image quality, all-weather work, scurviness environment is designed based on the triturating requirement of the space camera for debris. The lens breaks through the flaw that the conventional system always has complex structure, heavy weight, large volume, and only one focal.Diffractive optical element is used to calibrate the chromatic aberration and temperature difference by its characteristics. Ge and Si are utilized to calibrate the spherochromatic aberration. The result indicates that when spatial frequency is 16 lp/mm, the MTFs are above 0.45 and 0.55 in short focal and long focal, respectively. The MTF is approaching to the diffraction limit. The maximal RMS diameters of spot diagram are 15.8 μm and 7.2 μm in short focal and long focal, respectively, which are less than the diameter of detecting sensor. It shows that the image quality of the lens is very good, and it calibrates the temperature difference in real circumstance of the application.

Number of references:10

Main heading:Aberrations

Controlled terms:Cameras - Diffraction - Germanium - Image quality - Infrared imaging - Lenses - Manned space flight - Optical design - Space debris

Uncontrolled terms:Chromatic aberration - Compact structures - Conventional systems - Diffraction limits - Rendezvous and docking - Space cameras - Spherochromatic aberration - Temperature differences

Classification code:656.1 Space Flight - 741 Light, Optics and Optical Devices - 742.2 Photographic Equipment - 804 Chemical Products Generally

DOI:10.3788/HPLPB20132510.2511

Database:Compendex

Accession number:20131316148904

Title:Biview face recognition in the shape-texture domain

Authors:Xiao, Bing (1); Gao, Xinbo (1); Tao, Dacheng (3); Li, Xuelong (4)

Author affiliation:(1) School of Electronic Engineering, Xidian University, Xi'an 710071, China; (2) School of Computer Science, Shaanxi Normal University, Xi'an 710062, China; (3) Centre for Quantum Computation and Intelligent Systems, Faculty of Engineering and Information Technology, University of Technology, Sydney, 235 Jones Street, Ultimo, NSW 2007, Australia; (4) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China

Corresponding author:Li, X.(xuelong_li@opt.ac.cn)

Source title:Pattern Recognition

Abbreviated source title:Pattern Recogn.

Volume:46

Issue:7

Issue date:July 2013

Publication year:2013

Pages:1906-1919

Language:English

ISSN:00313203

CODEN:PTNRA8

Document type:Journal article (JA)

Publisher:Elsevier Ltd, Langford Lane, Kidlington, Oxford, OX5 1GB, United Kingdom

Abstract:Face recognition is one of the biometric identification methods with the highest potential. The existing face recognition algorithms relying on the texture information of face images are affected greatly by the variation of expression, scale and illumination. Whereas the algorithms based on the shape topology weaken the influence of illumination to some extent, but the impact of expression, scale and illumination on face recognition is still unsolved. To this end, we propose a new method for face recognition by integrating texture information with shape information, called biview face recognition algorithm. The texture models are constructed by using subspace learning methods and shape topologies are formed by building graphs for face images. The proposed biview face recognition method is compared with recognition algorithms merely based on texture or shape information. Experimental results of recognizing faces under the variation of illumination, expression and scale demonstrate that the performance of the proposed biview face recognition outperforms texture-based and shape-based algorithms. © 2012 Elsevier Ltd. All rights reserved.

Number of references:52

Main heading:Face recognition

Controlled terms:Algorithms - Textures - Topology

Uncontrolled terms:Active appearance models - Biometric identification methods - Face recognition algorithms - Face recognition methods - Graph edit distance - Recognition algorithm - Texture information - Texture models

Classification code:716 Telecommunication; Radar, Radio and Television - 723 Computer Software, Data Handling and Applications - 921 Mathematics - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory - 933 Solid State Physics

DOI:10.1016/j.patcog.2012.12.009

Database:Compendex

Accession number:20133516680712

Title:Design of calibration system for a great quantity of high precision scientific grade CCD cameras

Authors:Tan, Jia-Hai (1); Li, Peng-Yu (2); Qu, You-Shan (1); Han, Ya-Meng (1); Yu, Ya-Li (3); Wang, Wei (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an 710119, China; (2) Beijing Institute of Control Engineering, Beijing 100190, China; (3) Xi'an University of Arts and Science, Xi'an 710065, China

Source title:Applied Mechanics and Materials

Abbreviated source title:Appl. Mech. Mater.

Volume:331

Monograph title:2013 International Conference on Process Equipment, Mechatronics Engineering and Material Science

Issue date:2013

Publication year:2013

Pages:326-330

Language:English

ISSN:16609336

E-ISSN:16627482

ISBN-13:9783037857267

Document type:Conference article (CA)

Conference name:2013 International Conference on Process Equipment, Mechatronics Engineering and Material Science, PEME 2013

Conference date:June 15, 2013 - June 16, 2013

Conference location:Wuhan, Hubei, China

Conference code:99001

Sponsor:Deakin University; Wuhan University of Science and Technology; Hubei Mechanical Engineering Society

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:For the calibration of a great quantity of scientific grade CCD cameras in the high energy physics system, a scientific grade CCD camera calibration system with high precision and efficiency is designed. The designed camera calibration system consists of a 1053nm nanosecond solid-state laser, a knife, a double-integrating sphere, a laser power meter, a signal generator, a computer with its data processing software. Key technical parameters of scientific grade CCD under the condition of 1053nm optical pulses that are the modulation, contrast, defects, optical dynamic range, non-linear response can be calibrated by the designed calibration system. A double-integrating sphere with high uniformity and stability is designed as a uniform light source, which improves the calibrating performance and accuracy. Experimental results show the system designed in this paper can calibrate the large number of scientific grade CCD cameras quickly and efficiently. © (2013) Trans Tech Publications, Switzerland.

Number of references:4

Main heading:Calibration

Controlled terms:CCD cameras - Data processing - High energy physics - Light sources - Materials science - Solid state lasers

Uncontrolled terms:Calibration system - Camera calibration - Laser power meter - Measuring - Non-linear response - Optical dynamics - Precision - Scientific grade CCD

Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 951 Materials Science - 932.1 High Energy Physics - 744 Lasers - 723.2 Data Processing and Image Processing - 714.2 Semiconductor Devices and Integrated Circuits - 744.4 Solid State Lasers

DOI:10.4028/www.scientific.net/AMM.331.326

Database:Compendex

Accession number:20133516678864

Title:Synthesis and optical properties of neodymium-doped lanthanum fluoride nano-laser materials

Authors:Cui, Xiaoxia (1); Gao, Fei (1); Hou, Chaoqi (1); Guo, Haitao (1); Wang, Zhongyue (2); Wei, Wei (1); Peng, Bo (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and precision Mechanics, Chinese Academy of Science, Xi'an, Shaanxi 710119, China; (2) Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing, Jiangsu 210003, China

Corresponding author:Wei, W.(weiwei@njupt.edu.cn)

Source title:Zhongguo Jiguang/Chinese Journal of Lasers

Abbreviated source title:Zhongguo Jiguang

Volume:40

Issue:6

Issue date:June 2013

Publication year:2013

Article number:0606003

Language:Chinese

ISSN:02587025

CODEN:ZHJIDO

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:A new type of neodymium-doped lanthanum fluoride (LaF<inf>3</inf>:Nd) nanoparticles are synthesized by hydrothermal method. It exhibits hexagonal structure and a size of about 25 nm. A series of different concentrations of LaF<inf>3</inf>:Nd nanoparticles dispersion are prepared by ultrasonic technology. The visible-near-infrared spectra show that the dispersion with the optical path of 5 mm and neodymium ion concentration of 1×1020 cm-3 shows high transmittance of 85% at 1053 nm. The lifetime of the La<inf>0.95</inf>Nd<inf>0.05</inf>F<inf>3</inf> nanoparticles dispersion is 200 μs, compared with that of the powder, it is reduced by 3.8%. These results indicate that the LaF<inf>3</inf>:Nd nanoparticles dispersion with low fluorescence quenching rate, high ion concentration and high transmittance is a kind of promising material used for high repetition rate, high-power and ultra short pulse liquid laser.

Number of references:16

Main heading:Dispersions

Controlled terms:Liquid lasers - Materials - Nanoparticles - Neodymium - Quenching - Synthesis (chemical)

Uncontrolled terms:Fluorescence quenching - Hexagonal structures - High dispersion - High repetition rate - High transmittance - Hydrothermal methods - Quenching rate - Ultrasonic technology

Classification code:933 Solid State Physics - 802.2 Chemical Reactions - 761 Nanotechnology - 951 Materials Science - 744.3 Liquid Lasers - 547.2 Rare Earth Metals - 537.1 Heat Treatment Processes - 708 Electric and Magnetic Materials

DOI:10.3788/CJL201340.0606003

Database:Compendex

Accession number:20134616973461

Title:A tunable dual-wavelength pump source based on simulated polariton scattering for terahertz-wave generation

Authors:Sun, Bo (1); Liu, Jinsong (2); Yao, Jianquan (3); Li, Enbang (4)

Author affiliation:(1) Institute of Photonics and Photonic Technology, Northwest University, Xi'an 710069, China; (2) Wuhan National Lab for Optoelectronics, Huangzhong University of Science and Technology, Wuhan 430074, China; (3) College of Precision and Instrument and Opto-electronics Engineering, Tianjin University, Tianjing 300072, China; (4) CUDOS School of Physics, University of Sydney, Sydney, NSW 2006, Australia

Source title:Laser Physics

Abbreviated source title:Laser Phys.

Volume:23

Issue:11

Issue date:November 2013

Publication year:2013

Article number:115404

Language:English

ISSN:1054660X

E-ISSN:15556611

Document type:Journal article (JA)

Publisher:Institute of Physics Publishing, Temple Circus, Temple Way, Bristol, BS1 6BE, United Kingdom

Abstract:We propose a dual-wavelength pump source by utilizing stimulated polariton scattering in a LiNbO<inf>3</inf> crystal. The residual pump and the generated tunable Stokes waves can be combined to generate THz-wave generation via difference frequency generation (DFG). With a pump energy of 49 mJ, Stokes waves with a tuning range from 1067.8 to 1074 nm have been generated, and an output energy of up to 14.9 mJ at 1070 nm has been achieved with a conversion efficiency of 21.7%. A sum frequency generation experiment was carried out to demonstrate the feasibility of the proposed scheme for THz-wave DFG. © 2013 Astro Ltd.

Number of references:13

Main heading:Photons

Controlled terms:Optical frequency conversion - Phonons - Quantum theory - Scattering

Uncontrolled terms:Difference-frequency generation - Dual-wavelength - Output energy - Polariton scattering - Pump energies - Sum frequency generation - Terahertz-wave generation - Tuning ranges

Classification code:711 Electromagnetic Waves - 741.1 Light/Optics - 741.1.1 Nonlinear Optics - 931.3 Atomic and Molecular Physics - 931.4 Quantum Theory; Quantum Mechanics

DOI:10.1088/1054-660X/23/11/115404

Database:Compendex

Accession number:20131416156072

Title:Sparse coding for image denoising using spike and slab prior

Authors:Lu, Xiaoqiang (1); Yuan, Yuan (1); Yan, Pingkun (1)

Author affiliation:(1) The Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China

Corresponding author:Yan, P.(pingkun.yan@opt.ac.cn)

Source title:Neurocomputing

Abbreviated source title:Neurocomputing

Volume:106

Issue date:2013

Publication year:2013

Pages:12-20

Language:English

ISSN:09252312

E-ISSN:18728286

CODEN:NRCGEO

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:Sparse coding is a challenging and promising theme in image denoising. Its main goal is to learn a sparse representation from an over-complete dictionary. How to obtain a better sparse representation from the dictionary is important for the denoising process. In this paper, starting from the classic image denoising problem, a Bayesian-based sparse coding algorithm is proposed, which learns sparse representation with the spike and slab prior. Using the spike and slab prior, the proposed algorithm can achieve accurate prediction performance and effectively enforce sparsity. Experimental results on image denoising have demonstrated that the proposed algorithm can provide better representation and obtain excellent denoising performance. © 2012 Elsevier B.V.

Number of references:30

Main heading:Image denoising

Controlled terms:Algorithms

Uncontrolled terms:Accurate prediction - De-noising - Over-complete dictionaries - Sparse coding - Sparse representation - Spike and slab prior

Classification code:723 Computer Software, Data Handling and Applications - 723.2 Data Processing and Image Processing - 921 Mathematics

DOI:10.1016/j.neucom.2012.09.014

Database:Compendex

Accession number:20141717632956

Title:What's the role of image matting in image segmentation?

Authors:Zhu, Qingsong (1); Heng, Pheng Ann (3); Shao, Ling (4); Li, Xuelong (5)

Author affiliation:(1) Shenzhen Institutes of Advanced Technology, Chinese Advanced of Sciences, Shenzhen, China; (2) Chinese University of Hong Kong, Hong Kong, Hong Kong; (3) Department of Computer Science and Engineering, Chinese University of Hong Kong, Ho Sin-Hang Engineering Building, Shatin, N.T., Hong Kong; (4) Department of Electronic and Electrical Engineering, University of Sheffield, Sheffield, S1 3JD, United Kingdom; (5) Centre for OPTical IMagery Analysis and Learning (OPTIMAL), Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, Shanxi, China

Corresponding author:Zhu, Q.(qs.zhu@siat.ac.cn)

Source title:2013 IEEE International Conference on Robotics and Biomimetics, ROBIO 2013

Abbreviated source title:IEEE Int. Conf. Rob. Biomimetics, ROBIO

Monograph title:2013 IEEE International Conference on Robotics and Biomimetics, ROBIO 2013

Issue date:2013

Publication year:2013

Pages:1695-1698

Article number:6739711

Language:English

Document type:Conference article (CA)

Conference name:2013 IEEE International Conference on Robotics and Biomimetics, ROBIO 2013

Conference date:December 12, 2013 - December 14, 2013

Conference location:Shenzhen, China

Conference code:104586

Publisher:IEEE Computer Society

Abstract:Image Matting is the key technology in image processing, video editing, and film-making applications. With the fast development of modern information technology, image matting has gained increasing interests from both academic and industrial communities. So what is Image Matting? And, What's the Role of Image Matting in Image Segmentation? In this paper, we will try to give a comprehensive and constructive answer to the above questions. © 2013 IEEE.

Number of references:31

Main heading:Image segmentation

Controlled terms:Biomimetics - Information technology - Robotics

Uncontrolled terms:Image matting - Industrial communities - Key technologies - Modern information technologies - Video editing

Classification code:461.9 Biology - 731.5 Robotics - 741.1 Light/Optics - 903 Information Science

DOI:10.1109/ROBIO.2013.6739711

Database:Compendex

Accession number:20133916773068

Title:Spectroscopic properties and Judd-Ofelt analysis of Dy3+-doped and Dy3+, Tm3+-codped Ge-In-S chalcogenide glasses

Authors:Guo, Haitao (1); Xu, Yantao (1); Chen, Hongyan (2); Cui, Xiaoxia (1); Qiao, Zebang (1); Gu, Shaoxuan (3); Hou, Chaoqi (1); Meng, Wei (1); Lu, Chunfeng (1); Peng, Bo (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science (CAS), Xi'an, Shaanxi 710119, China; (2) Institute of Publication Science, Book Concern of Chang'an University, Xi'an, Shaanxi 710064, China; (3) State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, Hubei 430070, China

Corresponding author:Guo, H.(guoht_001@opt.ac.cn)

Source title:Journal of Non-Crystalline Solids

Abbreviated source title:J Non Cryst Solids

Volume:377

Issue date:2013

Publication year:2013

Pages:95-99

Language:English

ISSN:00223093

CODEN:JNCSBJ

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:0.2 wt.% Dy3+-doped and 0.2 wt.% Dy3+, 0.5 wt.% Tm3+-codoped (100-x)GeS<inf>2</inf>·xIn<inf>2</inf>S <inf>3</inf> (x=5,10,15,20,25) chalcogenide glasses were prepared. Their spectroscopic properties were analyzed based on absorption (ranges from 500 to 3000 nm) and emission (ranges from 1000 to 4700 nm) measurements. The Judd-Ofelt strength parameters Ω<inf>t</inf> (t =2, 4, 6) and the spectroscopy parameters A<inf>rad</inf>, β and τ<inf>rad</inf> were calculated, and the σ<inf>emi</inf> of the 1330, 2930 and 4320 nm fluorescences were estimated. These Dy3+-doped and Dy3+, Tm 3+-codoped Ge-In-S chalcogenide glasses are valuable materials for using in 1.3 μm fiber-amplifiers and 2-5 μm mid-infrared laser devices. © 2013 Elsevier B.V. All rights reserved.

Number of references:18

Main heading:Doping (additives)

Controlled terms:Absorption spectroscopy - Chalcogenides - Fiber amplifiers - Germanium - Glass - Optical parametric oscillators - Spectroscopic analysis - Spectroscopy

Uncontrolled terms:Chalcogenide glass - Judd-Ofelt - Judd-ofelt analysis - Midinfrared - Midinfrared lasers - Rare earth ions - Spectroscopic property - Strength parameters

Classification code:741.1.2 Fiber Optics - 744.9 Laser Applications - 801 Chemistry - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 812.3 Glass

DOI:10.1016/j.jnoncrysol.2013.01.013

Database:Compendex

Accession number:20132016325862

Title:The effect of additive on the performance and phase separation of benzo[1,2-b:3,4-b]dithiophene-based polymer heterojunction photovoltaic devices

Authors:Ni, Nan (1); Qu, Bo (3); Tian, Di (2); Cong, Zhiyuan (2); Wang, Weiping (2); Gao, Chao (2); Xiao, Lixin (3); Chen, Zhijian (3); Gong, Qihuang (3); Wei, Wei (1)

Author affiliation:(1) Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210003, China; (2) Xi'An Modern Chemistry Research Institute, Xi'an Shanxi 710065, China; (3) State Key Laboratory for Artificial Microstructures and Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871, China; (4) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science (CAS), Xi'an, Shaanxi 710119, China

Corresponding author:Qu, B.(bqu@pku.edu.cn)

Source title:Macromolecular Chemistry and Physics

Abbreviated source title:Macromol. Chem. Phys.

Volume:214

Issue:9

Issue date:May 14, 2013

Publication year:2013

Pages:985-993

Language:English

ISSN:10221352

E-ISSN:15213935

CODEN:MCHPES

Document type:Journal article (JA)

Publisher:Wiley-VCH Verlag, P.O. Box 101161, Weinheim, D-69451, Germany

Abstract:An alternating copolymer (PBDTC<inf>10</inf>DBT) of benzo[1,2-b:3,4- b′]dithiophene (BDT) as donor and 4,7-di(3-decylthiophen-2-yl)-2,1,3- benzothiadiazole (C<inf>10</inf>DBT) as acceptor is designed and synthesized. In order to investigate the effect of the 1,8-diiodooctane (DIO) additive on the morphology and photovoltaic performance, polymer solar cells (PSCs) based on PBDTC<inf>10</inf>DBT:[6,6]-phenyl-C<inf>61</inf>-butyric acid methyl ester (PC<inf>61</inf>BM) are fabricated. The morphology of blend films and the interpenetrating network between the donor and the acceptor is examined using atomic force microscopy and scanning electron microscopy. This work shows that the PBDTC<inf>10</inf>DBT:PC<inf>61</inf>BM blend films with added DIO (3%, v/v) have improved absorption and controlled phase separation. Morphology with a domain size of 20-30 nm that forms in the DIO system is proposed to facilitate charge transport and minimize charge carrier recombination, which are the main reasons why the power conversion efficiency of the PSCs is improved from 1.93% (without DIO) to 2.23% (with DIO). An alternating copolymer (PBDTC <inf>10</inf>DBT) of benzo[1,2-b:3,4-b']dithiophene (BDT) as donor and 4,7-dithiophene-2-yl-2,1,3-benzothiadiazole (DBT) as acceptor is synthesized. The influence of 3% (v/v) 1,8-diiodooctane on the absorption properties, the morphology of the active layer, and the photovoltaic properties is investigated. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Number of references:34

Main heading:Photovoltaic effects

Controlled terms:Additives - Atomic force microscopy - Copolymers - Heterojunctions - Morphology - Phase separation - Polymers - Scanning electron microscopy - Solar cells

Uncontrolled terms:1, 8-diiodooctane - Charge carrier recombination - Heterojunction photovoltaic devices - Photovoltaic performance - Photovoltaic property - Polymer solar cell (PSCs) - Polymer Solar Cells - Power conversion efficiencies

Classification code:951 Materials Science - 815.1 Polymeric Materials - 804 Chemical Products Generally - 803 Chemical Agents and Basic Industrial Chemicals - 741.3 Optical Devices and Systems - 741.1 Light/Optics - 714.2 Semiconductor Devices and Integrated Circuits - 641.1 Thermodynamics - 615.2 Solar Power

DOI:10.1002/macp.201200565

Database:Compendex

Accession number:20134616972710

Title:Erratum: Multiple frequency bands of square split resonant rings and metal wire metamaterial (Applied Optics (2013) 52 (6309-6315))

Authors:Gao, Peng (1); Zhang, Chunmin (1); Jia, Zongwei (1); Kang, Yongqiang (1)

Author affiliation:(1) School of Science, Xi'An Jiaotong University, Xi'an 710049, China; (2) Non-equilibrium Condensed Matter and Quantum Engineering Laboratory, Key Laboratory of the Ministry of Education, Xi'an 710049, China; (3) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science (CAS), Xi'an 710119, China

Corresponding author:Zhang, C.(zcm@mail.xjtu.edu.cn)

Source title:Applied Optics

Abbreviated source title:Appl. Opt.

Volume:52

Issue:31

Issue date:November 1, 2013

Publication year:2013

Pages:7523

Language:English

ISSN:1559128X

E-ISSN:15394522

CODEN:APOPAI

Document type:Journal article (JA)

Publisher:Optical Society of American (OSA)

Number of references:1

DOI:10.1364/AO.52.007523

Database:Compendex

Accession number:20141117451274

Title:Visual saliency by selective contrast

Authors:Wang, Qi (1); Yuan, Yuan (1); Yan, Pingkun (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Source title:IEEE Transactions on Circuits and Systems for Video Technology

Abbreviated source title:IEEE Trans Circuits Syst Video Technol

Volume:23

Issue:7

Issue date:July 2013

Publication year:2013

Pages:1150-1155

Article number:6353189

Language:English

ISSN:10518215

CODEN:ITCTEM

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:Automatic detection of salient objects in visual media (e.g., videos and images) has been attracting much attention. The detected salient objects can be utilized for segmentation, recognition, and retrieval. However, the accuracy of saliency detection remains a challenge. The reason behind this challenge is mainly due to the lack of a well-defined model for interpreting saliency formulation. To tackle this problem, this letter proposes to detect salient objects based on selective contrast. Selective contrast intrinsically explores the most distinguishable component information in color, texture, and location. A large number of experiments are thereafter carried out upon a benchmark dataset, and the results are compared with those of 12 other popular stateof-the-art algorithms. In addition, the advantage of the proposed algorithm is also demonstrated in a retargeting application. © 2012 IEEE.

Number of references:31

Main heading:Contrast media

Controlled terms:Algorithms

Uncontrolled terms:Automatic Detection - Benchmark datasets - Saliency - Saliency detection - Selective contrast - State-of-the-art algorithms - Terms-Attention - Visual media

Classification code:723 Computer Software, Data Handling and Applications - 803 Chemical Agents and Basic Industrial Chemicals - 921 Mathematics

DOI:10.1109/TCSVT.2012.2226528

Database:Compendex

Accession number:20141317510184

Title:Design of the segmented primary optical telescope

Authors:Zhang, Kaisheng (1); Yan, Aqi (1); Cao, Jianzhong (1); Fan, Zheyuan (1); Wu, Li (1); Zhang, Zhi (1); Zhu, Qing (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, 710119, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8907

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications

Issue date:2013

Publication year:2013

Article number:89073O

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497765

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:Following with the "high-resolution upsurge" appeared in many counties in recent few years, it is an inevitable trend to increase the size of the Optical Telescope. However, because of the volume constrains of space-borne astronomical instruments, segmented reflector is thought as the main measure of future astro-physical missions by many scientists. In this paper, a coaxial three-mirror anastigmatic system (TMA) with a segmented primary mirror is modeled in optical software. The optical system, which has 2.4m aperture, 48m focal length and the field-view angle of 0.3°x0.06°, works in the 450nm&sim;900nm wave band. The '1+6' aperture-stiching model is applied. Firstly, the initial structure of the system is inputted to the CODEV, and a certain constraint functions are set, and then the system automatically optimizes. Finally, designing results show that the Modulation Transfer Function (MTF) is really very near to the limit of diffraction. We get a good image quality of the optical system design results. © 2013 Copyright SPIE.

Number of references:7

Main heading:Thermography (imaging)

Controlled terms:Mirrors - Modulation - Optical design - Optical systems - Optical telescopes - Optical transfer function - Space optics

Uncontrolled terms:Astronomical instrument - Constraint functions - High resolution - Initial structures - Segmented primary mirrors - Segmented reflectors - Three mirror anastigmatic - Three-mirror anastigmatic systems

Classification code:716 Telecommunication; Radar, Radio and Television - 717 Optical Communication - 718 Telephone Systems and Related Technologies; Line Communications - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 742.1 Photography

DOI:10.1117/12.2034071

Database:Compendex

Accession number:20141317510077

Title:Design of compact apochromatic lens with very-broad spectrum and high resolution

Authors:Yan, Aqi (1); Cao, Jianzhong (1); Zhang, Jian (1); Zhang, Zhi (1); Wang, Hao (1); Wu, Dengshan (1); Zhou, Zuofeng (1); Zhang, Kaisheng (1); Lei, Yangjie (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, 710119, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8907

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications

Issue date:2013

Publication year:2013

Article number:89070A

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497765

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:This paper designs a compact apochromatic lens with long focal length, which operates over very-broad spectrum from 400nm to 900nm for high resolution image application. The focal length is 290mm, and F-number is 4.5.In order to match CCD sensor, lens resolution must be higher than 100lp/mm. It is a significant challenge to correct secondary spectrum over very-broad spectrum for this application. The paper firstly pays much attention on dispersion characteristic of optical materials over this very-broad spectrum, and dispersion characteristic of glasses is analyzed. After properly glasses combinations and optimal lens structure selected, this compact apochromatic lens is designed. The lens described in this paper comprises fewer lenses, most of them are ordinary optical materials, and only one special flint type TF3 with anomalous dispersion properties is used for secondary spectrum correction. Finally, the paper shows MTF and aberration curve for performance evaluation. It can be seen that MTF of the designed lens nearly reach diffraction limit at Nyquist frequency 100lp/mm, and residual secondary spectrum is greatly reduced to less than 0.03mm (in the lines 550nm and 787.5nm). The overall length of this compact apochromatic lens is just 0.76 times its focal length, and because of fewer lenses and ordinary optical materials widely used, production cost is also greatly reduced. © 2013 Copyright SPIE.

Number of references:11

Main heading:Dispersions

Controlled terms:Diffraction - Glass - Optical design - Optical materials - Structural optimization - Thermography (imaging)

Uncontrolled terms:Anomalous dispersion - Diffraction limits - Dispersion characteristics - High resolution - High resolution image - Long focal lengths - Secondary spectrums - Wide spectrum

Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems - 742.1 Photography - 812.3 Glass - 921.5 Optimization Techniques - 951 Materials Science

DOI:10.1117/12.2030546

Database:Compendex

Accession number:20143117991910

Title:Study of Hadamard transform spectral imager for faint object detection

Authors:Xin, Sun (1); Shi, Da-Lian (1); Wang, Le (1); Li, Li-Bo (1); Hu, Bing-Liang (1); Li, Yun (1)

Author affiliation:(1) Chinese Academy of Sciences, Key Laboratory of Spectral Imaging Technology, Xi'an, China; (2) Institute of Optics and Precisian Mechanics, Xi'an, 710119, China; (3) University of Chinese, Academy of Sciences, Beijing 100039, China

Source title:Proceedings of the International Astronautical Congress, IAC

Abbreviated source title:Proc. Int. Astronaut. Congr., IAC

Volume:4

Monograph title:64th International Astronautical Congress 2013, IAC 2013

Issue date:2013

Publication year:2013

Pages:2774-2778

Language:English

ISSN:00741795

ISBN-13:9781629939094

Document type:Conference article (CA)

Conference name:64th International Astronautical Congress 2013, IAC 2013

Conference date:September 23, 2013 - September 27, 2013

Conference location:Beijing, China

Conference code:106314

Publisher:International Astronautical Federation, IAF

Abstract:The multiplexing advantages of Hadamard Transform Spectrometer (HTS) make this type of instrument a different approach to spatial-target detection other than Fourier Transform spectrometer (HTS). The signal to noise ratio (SNR) merit and no moving parts of HTS opens the door to multiple spatial applications, especially in the field of object detection, in which the target is in low illumination condition. Two kinds of Hadamard transform spectrometer, which uses advanced spatial light modulator (Digital Micro-mirror Device, DMD™) and traditional mechanic mask are introduced respectively. The first type of HTS, which uses DMD™ on the second image plane, can implement the function of spectral domain encoding. The other type of HTS sets the mechanical plate at the first image plane as encoding silts. Each instrument implementation and the operating principles are studied, especially in the aspects of mask positioning method. The feasibility of pushbroom HTS with stationary encoding mask is analyzed. Lastly the paper presents partial simulation results of the data reconstruction. ©2013 by the International Astronautical Federation. All rights reserved.

Number of references:4

Main heading:Object recognition

Controlled terms:Encoding (symbols) - Hadamard transforms - Light modulators - Spectrometers - Spectroscopy

Uncontrolled terms:Data reconstruction - Digital micro-mirror device - Fourier transform spectrometers - Hadamard transform spectrometers - Operating principles - Positioning methods - Spatial applications - Spatial light modulators

Classification code:716 Telecommunication; Radar, Radio and Television - 723.2 Data Processing and Image Processing - 741.3 Optical Devices and Systems - 801 Chemistry - 921.1 Algebra

Database:Compendex

Accession number:20141617577119

Title:A stable polarization-insensitive wavelength converter based on nonlinear wave mixing in PCF

Authors:Xie, Xiaoping (1); Huang, Xinning (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, NO.17 Xinxi Road, New Industrial Park, Xi'an, Shaanxi, 710119, China

Corresponding author:Xie, X.(xxp@opt.ac.cn)

Source title:Optics InfoBase Conference Papers

Abbreviated source title:Opt.InfoBase Conf. Papers

Monograph title:Nonlinear Optics, NLO 2013

Issue date:2013

Publication year:2013

Language:English

E-ISSN:21622701

ISBN-13:9781557529770

Document type:Conference article (CA)

Conference name:Nonlinear Optics, NLO 2013

Conference date:July 21, 2013 - July 26, 2013

Conference location:Kohala Coast, HI, United states

Conference code:104360

Publisher:Optical Society of America

Abstract:A stable wavelength converter is experimentally demonstrated in this work, which can realize polarization-insensitive wavelength switching with polarizat ion dependence<0.14dB and power penalty<2dB at 10-9 BER level. The converted output signal OSNR is better than 30dB. © OSA 2013.

Number of references:4

Main heading:Nonlinear optics

Controlled terms:Polarization

Uncontrolled terms:Ion-dependence - Nonlinear wave mixing - Output signal - Polarization-insensitive - Power penalty - Wavelength converter - Wavelength-switching

Classification code:741.1 Light/Optics - 741.1.1 Nonlinear Optics

Database:Compendex

Accession number:20134316904319

Title:Embedded optical waveguides fabricated in SF10 glass by low-repetition-rate ultrafast laser

Authors:Bai, Jing (1); Long, Xuewen (1); Liu, Xin (1); Huo, Guangwen (1); Zhao, Wei (1); Stoian, Razvan (3); Hui, Rongqing (4); Cheng, Guanghua (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) Graduate University of Chinese Academy of Sciences, Beijing 100049, China; (3) Laboratoire Hubert Curien, UMR 5516 CNRS, Université Jean Monnet, Saint Etienne 42000, France; (4) Department of Electrical Engineering and Computer Science, University of Kansas, Lawrence, KS 66044, United States

Corresponding author:Cheng, G.(gcheng@opt.ac.cn)

Source title:Applied Optics

Abbreviated source title:Appl. Opt.

Volume:52

Issue:30

Issue date:October 20, 2013

Publication year:2013

Pages:7288-7294

Language:English

ISSN:1559128X

E-ISSN:15394522

CODEN:APOPAI

Document type:Journal article (JA)

Publisher:Optical Society of American (OSA)

Abstract:Symmetric embedded waveguides were fabricated in heavy metal oxide SF10 glass using slit-shaped infrared femtosecond laser writing in the low-repetition frequency regime. The impact of the writing parameters on the waveguide formation in the transverse writing scheme was systemically studied. Results indicate that efficient waveguides can be inscribed in a wide parameter space ranging from 500 fs to 1.5 ps pulse duration, 0.7-4.2 μJ pulse energy, and 5 μm/s to 640 μm/s scan speed and pointing out the robustness of the photoinscription process. The refractive index profile reconstructed from the measured near field pattern goes up to 10-3. In addition, propagation losses of the waveguides are tolerable, with the lowest propagation loss estimated at 0.7 dB/cm. With a 5 μm/s scan speed and 3.5 μJ pulse energy in a high-dose regime, few-mode guiding was achieved in the waveguide at 800 nm signal injection wavelength. This is due to a combination of increased refractive index in the core of the trace and the appearance of a depressed cladding. © 2013 Optical Society of America.

Number of references:25

Main heading:Electric losses

Controlled terms:Glass - Heavy metals - Refractive index - Ultrafast lasers - Waveguides

Uncontrolled terms:Depressed cladding - Embedded waveguides - Frequency regimes - Heavy metal oxides - Infrared femtosecond lasers - Near field patterns - Refractive index profiles - Waveguide formation

Classification code:531 Metallurgy and Metallography - 701.1 Electricity: Basic Concepts and Phenomena - 714.3 Waveguides - 741.1 Light/Optics - 744.1 Lasers, General - 812.3 Glass

DOI:10.1364/AO.52.007288

Database:Compendex

Accession number:20142817926607

Title:Comparison of timing noise properties of carbon nanotubes, graphene and graphene oxide as saturable absorbers for a mode-locked Er-doped fiber laser

Authors:Li, Xiaohui (1); Wu, Kan (2); Shum, Perry Ping (2); Wang, Yonggang (3); Wang, Yishan (3); Wang, Qijie (1)

Author affiliation:(1) School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Ave., 639798, Singapore, Singapore; (2) Centre for Disruptive Photonic Technologies, Nanyang Technological University, 21 Nanyang Link, 63737, Singapore, Singapore; (3) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Wang, Q.(qjwang@ntu.edu.sg)

Source title:2013 Conference on Lasers and Electro-Optics, CLEO 2013

Abbreviated source title:Conf. Lasers Electro-Opt., CLEO

Monograph title:2013 Conference on Lasers and Electro-Optics, CLEO 2013

Issue date:2013

Publication year:2013

Article number:6833929

Language:English

ISBN-13:9781557529725

Document type:Conference article (CA)

Conference name:2013 Conference on Lasers and Electro-Optics, CLEO 2013

Conference date:June 9, 2013 - June 14, 2013

Conference location:San Jose, CA, United states

Conference code:106048

Publisher:IEEE Computer Society

Number of references:4

Main heading:Graphene

Controlled terms:Carbon nanotubes - Fiber lasers - Locks (fasteners) - Mode-locked fiber lasers - Passive mode locking - Saturable absorbers

Uncontrolled terms:Carbon material - Er-doped fiber laser - Graphene oxides - Mode-locked - Passively mode-locked - Test platforms - Timing noise

Classification code:601.3 Mechanisms - 744.1 Lasers, General - 744.4 Solid State Lasers - 761 Nanotechnology - 804 Chemical Products Generally

Database:Compendex

Accession number:20134116828740

Title:The application of PSD in vibration measurment

Authors:Zhu, Yuan Tao (1); Wang, Tao (1); Yin, Fei (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, 710119, China

Source title:Applied Mechanics and Materials

Abbreviated source title:Appl. Mech. Mater.

Volume:380-384

Monograph title:Vehicle, Mechatronics and Information Technologies

Issue date:2013

Publication year:2013

Pages:820-823

Language:English

ISSN:16609336

E-ISSN:16627482

ISBN-13:9783037858202

Document type:Conference article (CA)

Conference name:2013 International Conference on Vehicle and Mechanical Engineering and Information Technology, VMEIT 2013

Conference date:August 17, 2013 - August 18, 2013

Conference location:Zhengzhou, Henan, China

Conference code:99783

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:Position Sensitive Detector (PSD) is a new type of photoelectric position sensor. Compared with traditional CCD, PSD has high position resolution, simple circuit and fast response. Operational principle of PSD and how it can be used in vibration system are firstly shown in this paper. B ased on the MCU, a vibration measurement system using a B OS-PSD0220 type sensor is designed. The system is then experimentally measured at the most sensitive area of PSD. The result is compared with data calculated by MATLAB LE, which demonstrates PSD is a good choice for vibration measurement. © (2013) Trans Tech Publications, Switzerland.

Number of references:7

Main heading:Information technology

Controlled terms:Sensors - Vibration measurement

Uncontrolled terms:MCU - Operational principles - Position resolution - Position sensors - Position-Sensitive Detectors - PSD - Vibration - Vibration systems

Classification code:801 Chemistry - 903 Information Science - 943.2 Mechanical Variables Measurements

DOI:10.4028/www.scientific.net/AMM.380-384.820

Database:Compendex

Accession number:20135117116106

Title:Saliency detection by multiple-instance learning

Authors:Wang, Qi (1); Yuan, Yuan (1); Yan, Pingkun (1); Li, Xuelong (1)

Author affiliation:(1) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, 710119 Xi'an, China

Source title:IEEE Transactions on Cybernetics

Abbreviated source title:IEEE Trans. Cybern.

Volume:43

Issue:2

Issue date:April 2013

Publication year:2013

Pages:660-672

Language:English

ISSN:21682267

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., 445 Hoes Lane / P.O. Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:Saliency detection has been a hot topic in recent years. Its popularity is mainly because of its theoretical meaning for explaining human attention and applicable aims in segmentation, recognition, etc. Nevertheless, traditional algorithms are mostly based on unsupervised techniques, which have limited learning ability. The obtained saliency map is also inconsistent with many properties of human behavior. In order to overcome the challenges of inability and inconsistency, this paper presents a framework based on multiple-instance learning. Low-, mid-, and high-level features are incorporated in the detection procedure, and the learning ability enables it robust to noise. Experiments on a data set containing 1000 images demonstrate the effectiveness of the proposed framework. Its applicability is shown in the context of a seam carving application. © 2012 IEEE.

Number of references:52

Main heading:Computer vision

Controlled terms:Learning systems

Uncontrolled terms:Attention - High-level features - Learning abilities - Multiple-instance learning - Saliency - Saliency detection - Saliency map - Unsupervised techniques

Classification code:723.5 Computer Applications - 731.5 Robotics

DOI:10.1109/TSMCB.2012.2214210

Database:Compendex

Accession number:20131316140690

Title:Systemic optimization of linear cavity Yb-doped double-clad fiber laser

Authors:Liu, Jinglin (1); Zhao, Chujun (2); Hu, Huanlong (1); Shuai, Cijun (1)

Author affiliation:(1) State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China; (2) Key Laboratory of Micro/Nano Optoelectronic Devices, Ministry of Education, Hunan University, Changsha 410082, China; (3) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Shuai, C.(shuai@mail.csu.edu.cn)

Source title:Optik

Abbreviated source title:Optik

Volume:124

Issue:9

Issue date:May 2013

Publication year:2013

Pages:793-797

Language:English

ISSN:00304026

Document type:Journal article (JA)

Publisher:Urban und Fischer Verlag Jena, P.O. Box 100537, Jena, 07705, Germany

Abstract:In order to optimize the double-clad fiber laser system, the laser output power should be as large as possible and the systemic cost should be as cheap as possible under the condition of the optimum fiber length. In this work, the improved approximate analytical solutions of the optimum fiber length and the laser output power are obtained based on the model of linear cavity strongly pumped Yb-doped double-clad fiber laser. And the effects of the laser scattering loss, the pump power, Yb dopant concentration, and the reflection coefficients of the input and output mirrors at laser wavelength on the laser output power and the optimum fiber length are discussed and analyzed in detail. Thereby the optimal laser system can be determined. © 2012 Elsevier GmbH.

Number of references:13

Main heading:Laser mirrors

Controlled terms:Fiber lasers - Fibers - Optimization - Pumping (laser) - Ytterbium

Uncontrolled terms:Approximate analytical solutions - Dopant concentrations - Double clad fiber laser - Input and outputs - Laser output power - Laser scattering - Optimum fiber length - Yb-doped double-clad fiber laser

Classification code:547.2 Rare Earth Metals - 744 Lasers - 812 Ceramics, Refractories and Glass - 817 Plastics and Other Polymers: Products and Applications - 921.5 Optimization Techniques

DOI:10.1016/j.ijleo.2012.02.007

Database:Compendex

Accession number:20135217126804

Title:Phase retrieval with resolution enhancement by using structured illumination

Authors:Gao, Peng (1); Pedrini, Giancarlo (1); Osten, Wolfgang (1)

Author affiliation:(1) Institut fur Technische Optik, Universitat Stuttgart, Pfaffenwaldring 9, 70569 Stuttgart, Germany; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Gao, P.(peng.gao@ito.uni-stuttgart.de)

Source title:Optics Letters

Abbreviated source title:Opt. Lett.

Volume:38

Issue:24

Issue date:December 15, 2013

Publication year:2013

Pages:5204-5207

Language:English

ISSN:01469592

E-ISSN:15394794

CODEN:OPLEDP

Document type:Journal article (JA)

Publisher:Optical Society of America, 2010 Massachusetts Ave, NW, Washington, DC, DC 20036-1023, United States

Abstract:In this Letter, we present referenceless phase retrieval methods with resolution enhancement. Structured illuminations with different orientations and phase shifts are generated by a spatial light modulator and are used to illuminate the specimen. The generated diffraction patterns are recorded by a CCD camera, and the phase of the wavefront is reconstructed from these patterns. © 2013 Optical Society of America.

Number of references:33

Main heading:Phase shifters

Controlled terms:Light modulators

Uncontrolled terms:Phase retrieval - Resolution enhancement - Spatial light modulators - Structured illumination

Classification code:703.1 Electric Networks - 741.3 Optical Devices and Systems

DOI:10.1364/OL.38.005204

Database:Compendex

Accession number:20131216134991

Title:Finite element analysis of the rolling bearing clearance environmental field with ANSYS

Authors:Zhang, Hui (1); Yang, Xiao Xu (1); Zhang, Xin Jie (1); Cao, Hong Yuan (3); Li, Da Wei (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an 710119, China; (2) Graduate University of Chinese Academy of Sciences, Beijing 100039, China; (3) Chinese People's Liberation Army 63618 troops, Ku'erle 841001, China

Corresponding author:Zhang, H.(Zhanghui@opt.cn)

Source title:Applied Mechanics and Materials

Abbreviated source title:Appl. Mech. Mater.

Volume:310

Monograph title:Engineered Technologies in Materials Science, Geotechnics, Environment and Mechanical Engineering

Issue date:2013

Publication year:2013

Pages:249-252

Language:English

ISSN:16609336

E-ISSN:16627482

ISBN-13:9783037856697

Document type:Conference article (CA)

Conference name:2012 International Conference on Engineering Materials, Geotechnical Engineering and Environmental Engineering, EMGEEE 2012

Conference date:October 26, 2012 - October 28, 2012

Conference location:Shijiazhuang, Hebei, China

Conference code:96002

Publisher:Trans Tech Publications, P.O. Box 1254, Clausthal-Zellerfeld, D-38670, Germany

Abstract:Due to the complex structure of the rolling bearing, a simplified bearing model was founded and then thermal stress simulation was analyzed with ANSYS. The various parts of the displacement changes can be got. Compared the simulation results with the actual results, it can be drawn that the simulation result is basically same with the analytical result. So the simplified model is right. This method is simple, and can be adapted to the general clearance analysis. © (2013) Trans Tech Publications, Switzerland.

Number of references:8

Main heading:Bearings (machine parts)

Controlled terms:Computer simulation - Finite element method - Geotechnical engineering - Roller bearings - Thermoanalysis

Uncontrolled terms:Analytical results - Ansys - Complex structure - Environmental fields - Radial clearance - Rolling bearings - Thermal stress simulation

Classification code:921.6 Numerical Methods - 801 Chemistry - 723.5 Computer Applications - 601.2 Machine Components - 483 Soil Mechanics and Foundations - 481 Geology and Geophysics - 409 Civil Engineering, General

DOI:10.4028/www.scientific.net/AMM.310.249

Database:Compendex

Accession number:20140817349947

Title:Numerical study on time response characteristics of InP/InGaAs/InP infrared photocathode

Authors:Sun, Qiaoxia (1); Xu, Xiangyan (1); An, Yingbo (1); Cao, Xibin (1); Liu, Hulin (1); Tian, Jinshou (1); Dong, Gaiyun (1); Guo, Hui (2); Li, Yanhong (2)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an 710119, China; (2) Science and Technology on Low-Light-Lever Night Vision Laboratory, Xi'an 710059, China

Corresponding author:Sun, Q.(sunqiaoxia@opt.cn)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:42

Issue:12

Issue date:December 2013

Publication year:2013

Pages:3163-3167

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:The time response characterisitics of InP/In<inf>0.53</inf>Ga<inf>0.47</inf>As/InP heterojunction infrared photocathode was studyed in this paper, such photocathode worked at transmission mode with a wide spectral response range from 1.0-1.7 μm. Under certain field-assisted bias voltage, the transmission characteristics of photo-excited electrons inside the phococathode were simulated. The results show that the response speed of the photocathode are accelerated with the increasing of the field-assisted bias voltage. While P-InGaAs photo-absorbing layer is thickened, the response speed gets slow. The response speed also gets slow when increasing the doping concentration of InGaAs photo-absorbing layer. When increasing the thickness and doping concentration of P-InP photoelectron-emitting layer, the respose time will be prolonged. Based on all these conclusions, the structure parameters and doping concentration of each layer were optimized. The optimization results show that when the thickness of the photo-absorbing layer and the photoelectron-emitting layer are about 2 μm and 0.5 μm respectively, and the doping concentration of photo-absorbing layer and photoelectron-emitting layer are about 1.5×1015 cm-3 and 1.0×1016 cm-3 respectively, the response time of photocathode can be reduced to less than 100 ps.

Number of references:10

Main heading:Photocathodes

Controlled terms:Bias voltage - Gallium - Heterojunctions - Optimization - Photoelectrons - Photons - Semiconducting indium

Uncontrolled terms:Doping concentration - InP - Photoexcited electrons - Response characteristic - Spectral response - Structure parameter - Time response characterisitics - Transmission characteristics

Classification code:741.3 Optical Devices and Systems - 741.1 Light/Optics - 713 Electronic Circuits - 921.5 Optimization Techniques - 712.1.1 Single Element Semiconducting Materials - 711 Electromagnetic Waves - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 712.1 Semiconducting Materials

Database:Compendex

Accession number:20140317209483

Title:Turning of DOE Ge single crystal with Micro-circle diamond tool

Authors:Li, Junqi (1); Zhang, Yunlong (1); Su, Jun (1); Wang, Zhibin (1); Guo, Xiaogang (1); Zong, Wenjun (2); Zhang, Lei (2)

Author affiliation:(1) Xi'an Institute of Applied Optics, Xi'an 710065, China; (2) Center for Precision Engineering, Harbin Institute of Technology, Harbin 150006, China

Corresponding author:Li, J.(lijunqi90@163.com)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:42

Issue:11

Issue date:November 2013

Publication year:2013

Pages:3053-3058

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:Single crystal germanium material diffractive optical element (DOE), which possesses unique negative chromatic dispersion and thermal expansion coefficient, has been widely used in the IR optical field. DOE requires optical surface and transition of phase profile well. Micro-circle single point diamond turning is one of the ways to solve it. Actually it's difficult to have the proper cutting tool parameters to fit the surface roughness and the transition of phase profile. So there is great sense to study the micro-circle single point diamond turning of DOE. This paper studied the roughness of single crystal Germanium materials affections on the turning parameters and the tool parameters by using the DEFORM 3D software. Then the test was done according to the optimization results of the simulation. The results show that the surface roughness is 4 nm when the micro-circle radius of single point diamond turning is 0.1 mm.

Number of references:17

Main heading:Diffractive optical elements

Controlled terms:Chromatic dispersion - Density (optical) - Germanium - Single crystals - Surface roughness - Turning

Uncontrolled terms:Cutting simulation - Deform 3D software - Ge single crystals - Optical surfaces - Single point diamond turning - Single-crystal germanium - Thermal expansion coefficients - Tool parameter

Classification code:604.2 Machining Operations - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 804 Chemical Products Generally - 931.2 Physical Properties of Gases, Liquids and Solids - 933.1 Crystalline Solids

Database:Compendex

Accession number:20140617267198

Title:Greedy regression in sparse coding space for single-image super-resolution

Authors:Tang, Yi (1); Yuan, Yuan (1); Yan, Pingkun (1); Li, Xuelong (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi, China

Corresponding author:Tang, Y.(yitang.math@gmail.com)

Source title:Journal of Visual Communication and Image Representation

Abbreviated source title:J Visual Commun Image Represent

Volume:24

Issue:2

Issue date:February 2013

Publication year:2013

Pages:148-159

Language:English

ISSN:10473203

E-ISSN:10959076

CODEN:JVCRE7

Document type:Journal article (JA)

Publisher:Academic Press Inc., 1250 Sixth Avenue, San Diego, California, CA 92101, United States

Abstract:Based on the assumption about the sparse representation of natural images and the theory of compressed sensing, very promising results about single-image super-resolution were obtained by an excellent algorithm introduced by Yang et al. [45]. However, their success could not be well explained theoretically. The lack of theoretical insight has hindered the further improvement of the algorithm. In this paper, Yang's algorithm is revisited in the view of learning theory. According to this point, Yang's algorithm can be considered as a linear regression method in a special feature space which is named as sparse coding space by us. In fact, it has been shown that Yang's algorithm is a result of optimal linear estimation in sparse coding space. More importantly, our theoretical analysis suggests that Yang's algorithm can be improved by using more flexible regression methods than the linear regression method. Following the idea, a novel single-image super-resolution algorithm which is designed based on the framework of L<inf>2</inf>-Boosting is proposed in the paper. The experimental results show the effectiveness of the proposed algorithm by comparing with other methods, which verify our theoretical analysis about Yang's algorithm. © 2012 Elsevier Inc. All rights reserved.

Number of references:49

Main heading:Algorithms

Controlled terms:Adaptive boosting - Learning systems - Linear regression - Optical resolving power

Uncontrolled terms:Empirical risk minimization - Greedy regression - Image quality improvements - L <inf>2</inf>-Boosting - Nonlinear coding - Sparsity - Super resolution

Classification code:723 Computer Software, Data Handling and Applications - 741.1 Light/Optics - 922.2 Mathematical Statistics

DOI:10.1016/j.jvcir.2012.02.003

Database:Compendex

Accession number:20133816744625

Title:Optical current sensor technology in power system

Authors:Wang, Lihui (1); Sun, Jian (3); Ji, Jianfei (3)

Author affiliation:(1) Key laboratory of micro-inertial instrument and advanced navigation technology, School of Instrument Science and Engineering, Southeast university, Nanjing 210096, China; (2) State key laboratory of transient optics and technology, Xi an institute of optics and precision mechanics, Chinese academy of sciences, Xi an 710119, China; (3) Jiangsu Electrical Power Company Research Institute, Nanjing, 211103, China

Source title:Key Engineering Materials

Abbreviated source title:Key Eng Mat

Volume:562-565

Monograph title:Micro-Nano Technology XIV

Issue date:2013

Publication year:2013

Pages:242-246

Language:English

ISSN:10139826

CODEN:KEMAEY

ISBN-13:9783037857397

Document type:Conference article (CA)

Conference name:14th Annual Conference and the 3rd International Conference of the Chinese Society of Micro-Nano Technology, CSMNT 2012

Conference date:November 4, 2012 - November 7, 2012

Conference location:Hangzhou, China

Conference code:99047

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:With power voltage and capacity improved greatly, power transmission system put a higher demand on reliability and safe operation of electrical equipments. Electromagnetic sensors and other conventional detection equipment can no longer meet the needs of the power system, and new sensing measurement techniques led to optical current and voltage sensing technology. As their unique advantages, optical current sensing technology is get in-depth study and attention, and gradually used in power system engineering applications. Combined with domestic and foreign research progress of optical current sensor, we analyzed the basic principles of the photoelectric sensing technology and problems faced in power system applications and key technologies. Focused on sensing characteristic differences of photoelectric sensors and electromagnetic sensor, we analyzed the effects of photoelectric sensor on protection, monitoring and control, measurement systems in data processing and data transmission, and study the corresponding key technology. Combined with the development of modern power system, we prospect optical current sensor sensing technology opportunities and challenges in smart grid. © 2013 Trans Tech Publications Ltd, Switzerland.

Number of references:13

Main heading:Technology

Controlled terms:Data processing - Electric power transmission - Nanotechnology - Photoelectricity - Sensors - Smart power grids

Uncontrolled terms:Electromagnetic sensors - Fiber-optical - Photoelectric sensors - Power system applications - Power system engineerings - Power transmission systems - Sensing characteristics - Smart grid

Classification code:901 Engineering Profession - 801 Chemistry - 761 Nanotechnology - 741.1 Light/Optics - 723.2 Data Processing and Image Processing - 706.1.1 Electric Power Transmission - 706.1 Electric Power Systems

DOI:10.4028/www.scientific.net/KEM.562-565.242

Database:Compendex

Accession number:20133716717843

Title:High-temperature solar cell for concentrated solar-power hybrid systems

Authors:Yang, Yang (1); Yang, Wenzheng (1); Tang, Weidong (1); Sun, Chuandong (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Source title:Applied Physics Letters

Abbreviated source title:Appl Phys Lett

Volume:103

Issue:8

Issue date:August 19, 2013

Publication year:2013

Article number:083902

Language:English

ISSN:00036951

CODEN:APPLAB

Document type:Journal article (JA)

Publisher:American Institute of Physics, 2 Huntington Quadrangle, Suite N101, Melville, NY 11747-4502, United States

Abstract:A high-temperature solar cell is proposed that harvests solar energy at elevated temperatures. Carrier separation is achieved by selective contacts that preferentially extract electrons or holes. The theoretical conversion efficiency of the proposed device is 38.6% at 600 K and an incident solar radiation concentration of 1000. The waste heat of this cell could be used by a secondary thermal converter boosting the total efficiency of the hybrid system above 55%. © 2013 AIP Publishing LLC.

Number of references:18

Main heading:Solar cells

Controlled terms:Hybrid systems - Solar energy - Waste heat

Uncontrolled terms:Carrier separation - Elevated temperature - High temperature - Selective contacts - Solar radiation concentrations - Thermal converters - Total efficiency

Classification code:615.2 Solar Power - 643.1 Space Heating - 921 Mathematics

DOI:10.1063/1.4819201

Database:Compendex

Accession number:20124715686002

Title:Double image encryption scheme by using random phase encoding and pixel exchanging in the gyrator transform domains

Authors:Liu, Zhengjun (1); Zhang, Yu (1); Li, She (3); Liu, Wei (3); Liu, Wanyu (1); Wang, Yanhua (4); Liu, Shutian (3)

Author affiliation:(1) HIT-INSA Sino French Research Center for Biomedical Imaging, Department of Automatic Measurement and Control, Harbin Institute of Technology, Harbin 150001, China; (2) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an 710119, China; (3) Department of Physics, Harbin Institute of Technology, Harbin 150001, China; (4) Kunshan Branch, Institute of Microelectronics of Chinese Academy of Science, Kunshan 215347, China

Corresponding author:Liu, Z.(zjliu@hit.edu.cn)

Source title:Optics and Laser Technology

Abbreviated source title:Opt Laser Technol

Volume:47

Issue date:April 2013

Publication year:2013

Pages:152-158

Language:English

ISSN:00303992

CODEN:OLTCAS

Document type:Journal article (JA)

Publisher:Elsevier Ltd, Langford Lane, Kidlington, Oxford, OX5 1GB, United Kingdom

Abstract:We present a double image encryption scheme by using random pixel exchanging and phase encoding in gyrator domains. Two original images are regarded as the amplitude and phase of a function in the encryption algorithm. The pixels of the two images are exchanged randomly by controlling of a matrix. The same random matrix is used in the process of pixel exchanging and phase encoding for saving space in the application of transmission and storage of key. Some numerical simulation results are made for demonstrating the performance and security of the double image encryption. © 2012 Elsevier Ltd.

Number of references:47

Main heading:Pixels

Controlled terms:Computer simulation - Cryptography - Encoding (symbols) - Gyrators - Image processing

Uncontrolled terms:Encryption algorithms - Gyrator transform - Image encryption scheme - Image encryptions - Image hiding - Original images - Phase encoding - Random Matrix - Random-phase encoding - Scrambling

Classification code:708.4 Magnetic Materials - 716 Telecommunication; Radar, Radio and Television - 717 Optical Communication - 718 Telephone Systems and Related Technologies; Line Communications - 723 Computer Software, Data Handling and Applications

DOI:10.1016/j.optlastec.2012.09.007

Database:Compendex

Accession number:20135117116134

Title:Error analysis of stochastic gradient descent ranking

Authors:Chen, Hong (1); Tang, Yi (3); Li, Luoqing (4); Yuan, Yuan (3); Li, Xuelong (3); Tang, Yuanyan (2)

Author affiliation:(1) College of Science, Huazhong Agricultural University, Wuhan 430070, China; (2) Department of Computer and Information Science, Faculty of Science and Technology, University of Macau, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (4) Key Laboratory of Applied Mathematics of Hubei Province, Faculty of Mathematics and Computer Science, Hubei University, Wuhan 430062, China

Source title:IEEE Transactions on Cybernetics

Abbreviated source title:IEEE Trans. Cybern.

Volume:43

Issue:3

Issue date:June 2013

Publication year:2013

Pages:898-909

Language:English

ISSN:21682267

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., 445 Hoes Lane / P.O. Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:Ranking is always an important task in machine learning and information retrieval, e.g., collaborative filtering, recommender systems, drug discovery, etc. A kernel-based stochastic gradient descent algorithm with the least squares loss is proposed for ranking in this paper. The implementation of this algorithm is simple, and an expression of the solution is derived via a sampling operator and an integral operator. An explicit convergence rate for leaning a ranking function is given in terms of the suitable choices of the step size and the regularization parameter. The analysis technique used here is capacity independent and is novel in error analysis of ranking learning. Experimental results on real-world data have shown the effectiveness of the proposed algorithm in ranking tasks, which verifies the theoretical analysis in ranking error. © 2013 IEEE.

Number of references:31

Main heading:Error analysis

Controlled terms:Learning algorithms - Mathematical operators - Time varying networks

Uncontrolled terms:Analysis techniques - Integral operators - Ranking - Ranking functions - Regularization parameters - Reproducing Kernel Hilbert spaces - Stochastic gradient descent - Stochastic gradient descent algorithm

Classification code:703.1 Electric Networks - 723 Computer Software, Data Handling and Applications - 921 Mathematics - 921.6 Numerical Methods

DOI:10.1109/TSMCB.2012.2217957

Database:Compendex

Accession number:20131616218935

Title:All-optical EIT-like phenomenon in plasmonic stub waveguide with ring resonator

Authors:Cui, Yudong (1); Zeng, Chao (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Cui, Y.(cuiyudong@opt.cn)

Source title:Optics Communications

Abbreviated source title:Opt Commun

Volume:297

Issue date:June 15, 2013

Publication year:2013

Pages:190-193

Language:English

ISSN:00304018

CODEN:OPCOB8

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:An optical phenomenon analogous to electromagnetically induced transparency (EIT) has been proposed and investigated numerically in a plasmonic system, which is composed of a single stub-shaped metal-insulator-metal (MIM) waveguide coupled with a ring resonator. The transmission properties of the system are simulated by the finite-difference time-domain (FDTD) method. The bandwidth of the EIT-like spectrum is mainly dependent on the coupling distance between the stub and ring resonator. The red-shift of EIT-like peak is nearly linearly proportional to the increase in the radius and the refractive index of ring resonator, as is confirmed by the theoretical calculations. Our compact plasmonic structure may find potential applications in highly integrated optical circuits, such as nanoscale filters and optical switching. © 2013 Elsevier B.V.

Number of references:39

Main heading:Quantum optics

Controlled terms:Finite difference time domain method - MIM devices - Optical resonators - Plasmons - Refractive index - Time domain analysis - Waveguides

Uncontrolled terms:Electromagnetically induced transparency - Finite-difference time-domain (FDTD) methods - Integrated optical circuit - Linearly proportional - Metal insulator metals - Surface plasmons - Theoretical calculations - Transmission property

Classification code:712.1 Semiconducting Materials - 714.2 Semiconductor Devices and Integrated Circuits - 714.3 Waveguides - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 921 Mathematics

DOI:10.1016/j.optcom.2013.01.061

Database:Compendex

Accession number:20130916050723

Title:Influence of three-photon absorption on mid-infrared cross-phase modulation in silicon-on-sapphire waveguides

Authors:Wang, Zhaolu (1); Liu, Hongjun (1); Huang, Nan (1); Sun, Qibing (1); Wen, Jin (1); Li, Xuefeng (2)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science (CAS), Xi'an, 710119, China; (2) School of Science, Xi'an University of Post and Telecommunications, Xi'an 710121, China

Corresponding author:Wang, Z.

Source title:Optics Express

Abbreviated source title:Opt. Express

Volume:21

Issue:2

Issue date:January 28, 2013

Publication year:2013

Pages:1840-1848

Language:English

E-ISSN:10944087

Document type:Journal article (JA)

Publisher:Optical Society of America, 2010 Massachusetts Ave, NW, Washington, DC, DC 20036-1023, United States

Abstract:The influence of three-photon absorption (3PA) on cross-phase modulation (XPM) effect in the mid-infrared (IR) region is theoretically investigated in silicon-on-sapphire (SOS) waveguides. It is found that the 3PA-induced nonlinear losses in the SOS waveguide will be considerable for the pulse propagation in the wavelength region of 2300 nm-3300 nm when the pump peak intensity is high enough. For the XPM process, the 3PA and 3PA-induced free-carrier effects can affect the spectrum and temporal profiles of the pump and signal pulses for sufficiently high pump peak intensities. Moreover, the XPM-induced frequency shift of signal spectrum is also discussed with different pump peak intensities, and the XPM-induced blue and red shifts are reduced due to 3PA. © 2013 Optical Society of America.

Number of references:44

Main heading:Optical pumping

Controlled terms:Infrared devices - Light absorption - Multiphoton processes - Phase modulation - Pumps - Systems engineering - Waveguides

Uncontrolled terms:Cross-phase modulations - Free-carrier effects - Frequency shift - Midinfrared - Nonlinear loss - Peak intensity - Pulse propagation - Red shift - Signal pulse - Signal spectrum - Silicon-on-sapphire - Temporal profile - Three photon absorption - Three-photon absorption (3PA) - Wavelength regions

Classification code:961 Systems Science - 912 Industrial Engineering and Management - 741.3 Optical Devices and Systems - 741.1 Light/Optics - 716 Telecommunication; Radar, Radio and Television - 714.3 Waveguides - 618.2 Pumps

DOI:10.1364/OE.21.001840

Database:Compendex

Accession number:20135117103916

Title:An all-optical encryption system scheme for 8 wave signals based on LiNbO<inf>3</inf> waveguide

Authors:Xie, Xiao-Ping (1); Duan, Jie (1); Duan, Tao (2); Wen, Yu (1)

Corresponding author:Duan, J.(duanjiedemail@163.com)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:42

Issue:10

Issue date:October 2013

Publication year:2013

Pages:1169-1175

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:Owing to based on the nonlinear effect, the all-optical encryption scheme can only be applied to encrypt signal wave optical signal, in order to solve the problem that recent all-optical scheme can not be applied to encrypt multi-wave signal simulatanously, an all-optical encryption system scheme which can simultaneously encrypt multi-wave optical signals is proposed. This scheme is based on pockels effect of LiNbO<inf>3</inf> waveguide and achieves signals encrypting operation by interference of coherent optical signals and keys. Because the difference of modulated phase shift of different wavelength through the same external electric field in LiNbO<inf>3</inf> waveguide is very small, so, this scheme can be used to encrypt multi-wave signals simultaneously. The simulation of encrypting operation of 8×10 Gbps multe-wave signals whose interval of wavelength is 0.8 nm has been realized, the code type is NRZ with rise and fall time of 10ps, the BER of the encrypted output is smaller than 4.30×10-86. And the Q factor of the encrypted output is larger than 21.51. It is verified that this all-optical encryption scheme can achieve encrypting operation for multi-wave input signals within 400 nm by theoretic analyzing and simulative experiment. Moreover, when the wavelegth range of multi-wave signal is small than 78 nm, the operation of all-optical enctyption can improve the extinction ratio of input signals. Theoretic analyzing and simulative experiment comfirm the feasibility and effectiveness of this multi-wave all-optical encryption system.

Number of references:21

Main heading:Cryptography

Controlled terms:Experiments - Optical signal processing - Wave interference - Waveguides

Uncontrolled terms:All-optical scheme - Encryption schemes - Encryption system - External electric field - Extinction ratios - Multi-wave - Nonlinear effect - Rise and fall time

Classification code:723 Computer Software, Data Handling and Applications - 718 Telephone Systems and Related Technologies; Line Communications - 717 Optical Communication - 901.3 Engineering Research - 716 Telecommunication; Radar, Radio and Television - 711 Electromagnetic Waves - 703 Electric Circuits - 714.3 Waveguides

DOI:10.3788/gzxb20134210.1169

Database:Compendex

Accession number:20131616214073

Title:Condition for realizing single-mode operation and energy distribution characteristics in far-field of annular core fibers

Authors:Hui, Xiangyun (1); Duan, Kailiang (1); Yan, Hongwei (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Hui, X.(fn001cn@126.com)

Source title:Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams

Abbreviated source title:Qiangjiguang Yu Lizishu

Volume:25

Issue:4

Issue date:April 2013

Publication year:2013

Pages:841-846

Language:English

ISSN:10014322

CODEN:QYLIEL

Document type:Journal article (JA)

Publisher:Editorial Office of High Power Laser and Particle Beams, P.O. Box 919-805, Mianyang, 621900, China

Abstract:Based on the weak guidance approximation, the condition for realizing single mode operation of annular core fiber (ACF) and the energy distribution in far-field are discussed. The theoretical results demonstrate that when an ACF realizes single-mode operation, the annular beam emitted from the end of ACF diffracts to a central circular area in the far-field with good energy focusability. Besides, the beam width gets smaller when the thickness of the guiding section and the refractive index difference between the cladding and fiber core are reduced.

Number of references:13

Main heading:Fibers

Controlled terms:Electric power distribution - Refractive index

Uncontrolled terms:Annular beams - Energy distributions - Far field - Refractive index differences - Single mode - Single mode operation - Theoretical result - Weak guidance approximation

Classification code:706.1.2 Electric Power Distribution - 741.1 Light/Optics - 812 Ceramics, Refractories and Glass - 817 Plastics and Other Polymers: Products and Applications

DOI:10.3788/HPLPB20132504.0841

Database:Compendex

Accession number:20131516191821

Title:Improvement of MTF measurement and analysis using knife-edge method

Authors:Bu, Fan (1); Qiu, Yuehong (1); Yan, Xingtao (2)

Author affiliation:(1) Space Optics Laboratory, Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an 710119, China; (2) Key Laboratory of Spectrum Imaging Technology, Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an 710119, China; (3) Graduate School of CAS, Beijing 100049, China

Corresponding author:Bu, F.(bufan19860731@163.com)

Source title:Journal of Computational Information Systems

Abbreviated source title:J. Comput. Inf. Syst.

Volume:9

Issue:3

Issue date:February 1, 2013

Publication year:2013

Pages:987-994

Language:English

ISSN:15539105

Document type:Journal article (JA)

Publisher:Binary Information Press, P.O. Box 162, Bethel, CT 06801-0162, United States

Abstract:Modulation transfer function (MTF) is more authoritative in evaluating the performance of optical imaging system. Therefore, measuring MTF directly from the information of remote sensing image is an important method to monitor on-orbit satellites. This paper chooses knife-method which is applicable for MTF measurement of on-orbit satellites. In the process of calculating MTF, a new-type nonlinear least squares iteration algorithm, instead of simulated annealing algorithm, is selected to approach ESF using the Fermi function. Simulation results show that the new algorithm has greater superiority in the precision and speed. Furthermore, on the basis of implementation of MTF measurement, this paper studies the influence of edge height and angle on MTF, and tests the precision of the method. Copyright © 2013 Binary Information Press.

Number of references:12

Main heading:Algorithms

Controlled terms:Image reconstruction - Orbits

Uncontrolled terms:Iterative algorithm - Knife-edge method - Measurement and analysis - MTF - Non-linear least squares - Optical imaging system - Remote sensing images - Simulated annealing algorithms

Classification code:655.2 Satellites - 723 Computer Software, Data Handling and Applications - 741 Light, Optics and Optical Devices - 921 Mathematics

Database:Compendex

Accession number:20132616444962

Title:Observations of bound states of two and three dissipative solitons in a figure-eight laser in a normal dispersion regime

Authors:Yun, Ling (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Yun, L.(Yunling627@yahoo.cn)

Source title:Laser Physics

Abbreviated source title:Laser Phys.

Volume:23

Issue:4

Issue date:April 2013

Publication year:2013

Article number:045106

Language:English

ISSN:1054660X

E-ISSN:15556611

Document type:Journal article (JA)

Publisher:Institute of Physics Publishing, Temple Circus, Temple Way, Bristol, BS1 6BE, United Kingdom

Abstract:Dissipative bound-state solitons exhibiting a trapezoid spectral profile and a regular modulation pattern are observed experimentally in a figure-eight fiber laser with large normal cavity dispersion for the first time, to the best of the author's knowledge. The soliton pairs have a pulse duration T<inf>0</inf> of about 800 fs and a peak-to-peak separation of about 8T<inf>0</inf>. With the appropriate increase of the pumping strength, the proposed laser generates a bound state of three solitons with a pulse duration T<inf>0</inf> of about 460 fs and a separation between adjacent pulses of about 15T<inf>0</inf>. Experimental results show that the bound-state solitons are strongly stable and suggest that they are formed by direct soliton interaction. © 2013 Astro Ltd.

Number of references:40

Main heading:Solitons

Controlled terms:Fiber lasers - Optical pumping - Separation

Uncontrolled terms:Dissipative solitons - Modulation patterns - Normal dispersion - Peak-to-peak separation - Pulse durations - Soliton interactions - Soliton pairs - Spectral profile

Classification code:741.1 Light/Optics - 741.1.2 Fiber Optics - 802.3 Chemical Operations - 931.3 Atomic and Molecular Physics

DOI:10.1088/1054-660X/23/4/045106

Database:Compendex

Accession number:20132016322910

Title:Improvement of Bayer-pattern demosaicking with dictionary learning algorithm

Authors:Zhu, Bo (1); Wen, De-Sheng (1); Wang, Fei (3); Li, Hua (4); Song, Zong-Xi (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) Graduate University of Chinese Academy of Sciences, Beijing 100049, China; (3) Xi'an Jiaotong University, Xi'an 710049, China; (4) Shangluo University, Shangluo 726000, China

Corresponding author:Zhu, B.(zhubo@opt.ac.cn)

Source title:Dianzi Yu Xinxi Xuebao/Journal of Electronics and Information Technology

Abbreviated source title:Dianzi Yu Xinxi Xuebao

Volume:35

Issue:4

Issue date:April 2013

Publication year:2013

Pages:812-819

Language:Chinese

ISSN:10095896

CODEN:DKXUEC

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:Demosaicking is important for the quality of digital images in resource-constrained single chip devices. This paper presents an improved dictionary learning-based color demosaicking algorithm. Firstly, an initial interpolation is applied to the R , B channel by Local Directional Interpolation (LDI) and fused by analysis the joint distribution of the gradient. Gaussian Mixture Model (GMM)-based clustering is used to classify dictionary image into different classes. The Principal Component Analysis (PCA) is performed on these classes to choose the principal components for the dictionary construction. And then, dictionary learning is applied to obtain the interpolated G&circ; and the lost R&circ; and B&circ; are interpolated by the help of the reconstructed G&circ;, accordingly. Since R&circ;, G&circ; andB&circ; of the given pixels are better represented, the whole image can be reconstructed accurately. Taking McMaster color image dataset as dictionary, standard image and image from DALSA CMOS camera are used for effect evaluation of the demosaicking algorithm. Experimental results prove that the proposed algorithm outperforms some state-of-the-art demosaicking methods both in PSNR measure and visual quality.

Number of references:19

Main heading:Interpolation

Controlled terms:CMOS integrated circuits - Color image processing - Image processing - Learning algorithms - Principal component analysis

Uncontrolled terms:Bayer pattern - Demosaicking - Dictionary constructions - Dictionary learning - Dictionary learning algorithms - Directional interpolation - Gaussian Mixture Model - Principal Components

Classification code:714.2 Semiconductor Devices and Integrated Circuits - 723 Computer Software, Data Handling and Applications - 741 Light, Optics and Optical Devices - 741.1 Light/Optics - 921.6 Numerical Methods - 922.2 Mathematical Statistics

DOI:10.3724/SP.J.1146.2012.00947

Database:Compendex

Accession number:20134416927605

Title:Optical design of waveguide holographic binocular display for machine vision

Authors:Wang, Jian Gang (1); Yan, Zhan Jun (2); Li, Wen Qiang (2)

Author affiliation:(1) Northwestern Polytechnical University (NPU), Xi'an 710068, China; (2) Science and Technology on Electro-Optical Control Laboratory, Luoyang Institute of Electro-Optic Equipment, AVIC, 471000, China

Source title:Applied Mechanics and Materials

Abbreviated source title:Appl. Mech. Mater.

Volume:427-429

Monograph title:Mechanical Engineering, Industrial Electronics and Information Technology Applications in Industry

Issue date:2013

Publication year:2013

Pages:763-769

Language:English

ISSN:16609336

E-ISSN:16627482

ISBN-13:9783037858905

Document type:Conference article (CA)

Conference name:2nd International Conference on Mechanical Engineering, Industrial Electronics and Informatization, MEIEI 2013

Conference date:September 14, 2013 - September 15, 2013

Conference location:Chongqing, China

Conference code:100386

Sponsor:Chongqing University of Science and Technology; Computer Science and Electronic Technology International Society; Atlantis press; Chongqing Normal University; Chongqing University of Technology; et al

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:A binocular display can satisfy competition mechanism of biological vision system and improve display precision. A binocular optical system is designed with waveguide holography (WGH) for small size and light weight. A superimposed holographic volume grating can split the image bearing lights into two equal intensity light beams. The out-coupling waveguide holographic gratings for the left and right eyes can implement image extension and imaging display. The simulation and experimental results reveal that excellent optical performances can be achieved for little distortion of less than 0.05%(nearly zero), light weight of about only 32g, and compact size. The display information can also be overlaid the outside scenes in eyeglass augmented reality and Machine Vision Display applications. © (2013) Trans Tech Publications, Switzerland.

Number of references:9

Main heading:Computer vision

Controlled terms:Augmented reality - Couplings - Goggles - Holography - Industrial electronics - Information technology - Mechanical engineering - Optical design - Optical systems - Waveguides

Uncontrolled terms:Binocular display - Biological vision systems - Compact size - Competition mechanism - Display application - Holographic volume gratings - Optical performance - Superimposed gratings

Classification code:914.1 Accidents and Accident Prevention - 903 Information Science - 746 Imaging Techniques - 743 Holography - 741 Light, Optics and Optical Devices - 723.5 Computer Applications - 723 Computer Software, Data Handling and Applications - 716 Telecommunication; Radar, Radio and Television - 715 Electronic Equipment, General Purpose and Industrial - 714.3 Waveguides - 714 Electronic Components and Tubes - 608 Mechanical Engineering, General - 602 Mechanical Drives and Transmissions

DOI:10.4028/www.scientific.net/AMM.427-429.763

Database:Compendex

Accession number:20131316145054

Title:Numerical analysis of temporal response of a large exponential-doping transmission-mode GaAs photocathode

Authors:Cai, Zhipeng (1); Yang, Wenzheng (2); Tang, Weidong (1); Hou, Xun (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics of CAS, New Industrial Park, Xi'An Hi-Tech Industrial Development Zone, No. 17 Xinxi Road, Xi'an, 710119 Shaanxi, China; (2) Xi'An Institute of Optics and Precision Mechanics of CAS, Key Laboratory of Ultrafast Photoelectric Diagnostics Technology, 710119 Shaanxi, China

Corresponding author:Cai, Z.(caizhipeng@opt.ac.cn)

Source title:Materials Science in Semiconductor Processing

Abbreviated source title:Mater Sci Semicond Process

Volume:16

Issue:2

Issue date:April 2013

Publication year:2013

Pages:238-244

Language:English

ISSN:13698001

Document type:Journal article (JA)

Publisher:Elsevier Ltd, Langford Lane, Kidlington, Oxford, OX5 1GB, United Kingdom

Abstract:The theory of temporal response properties for a large exponential-doping transmission mode GaAs photocathode is discussed in detail. By the introduction of a new concept referred to as average decay time, the deficiency usually caused by the boundary condition in the previous calculations is effectively eliminated. The analytical results show that the response time of the new GaAs photocathode can be significantly reduced to several picoseconds in the absence of bias. In addition, the thickness of the GaAs absorption layer we obtained is much larger than that of traditional GaAs photocathodes with the same response time, which means that the novel photocathode with ultrafast time response will have higher yield, especially in near-infrared region. © 2012 Elsevier Ltd.

Number of references:29

Main heading:Semiconducting gallium

Controlled terms:Field emission cathodes - Gallium arsenide - Photocathodes

Uncontrolled terms:Absorption layer - Analytical results - Average delay time - GaAs photocathodes - Large exponential-doping - Near infrared region - Temporal response - Transmission mode

Classification code:712.1.1 Single Element Semiconducting Materials - 714.1 Electron Tubes - 804 Chemical Products Generally

DOI:10.1016/j.mssp.2012.09.011

Database:Compendex

Accession number:20135117103923

Title:Harmonic diffractive optical element wave crest drift with incident angles

Authors:Yu, Deng-Qun (1); Cao, Jian-Zhong (1); Yan, A-Qi (1); Zhang, Jian (1); Qu, En-Shi (1); Wang, Feng (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Cao, J.-Z.(cjz@opt.ac.cn)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:42

Issue:10

Issue date:October 2013

Publication year:2013

Pages:1208-1211

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:According to phase shift method of binary optics, the phase delay expression and the diffraction efficiency of Harmonic Diffractive Optical Element (HDOE) at oblique incidence were derived. And the relationship between the diffraction efficiency and the beam incident angle was qualitatively analyzed. The results show that in the visible spectral range, resonant wavelength of HDOE becomes longer with incidence angle increasing, otherwise in the short-wave part wave crest drift more violently; with incident angle of monochromatic light increasing, the diffraction order sequence appears; with the incidence angle increasing, the wave crest of ordinary binary element drift much faster than HDOE; beam incidence angle has a greater impact on diffraction efficiency of short wave.

Number of references:14

Main heading:Density (optical)

Controlled terms:Diffraction efficiency - Diffractive optical elements - Harmonic analysis

Uncontrolled terms:Beam incidence angle - Harmonic Diffractive Optical Element (HDOE) - Incident angles - Monochromatic light - Phase-shift method - Resonant wavelengths - Visible spectral range - Wave crest

Classification code:711 Electromagnetic Waves - 741 Light, Optics and Optical Devices - 743 Holography - 921.6 Numerical Methods

DOI:10.3788/gzxb20134210.1208

Database:Compendex

Accession number:20133016534351

Title:Design & development of multi-mode integrated timing device

Authors:Ke, Xizheng (1); Liu, Juanhua (1); Li, Jianxun (1)

Author affiliation:(1) Faculty of Automation and Information Engineering, Xi'an University of Technology, Xi'an 710048, China; (2) Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an 710119, China

Corresponding author:Ke, X.(xzke@xaut.edu.cn)

Source title:Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument

Abbreviated source title:Yi Qi Yi Biao Xue Bao

Volume:34

Issue:6

Issue date:June 2013

Publication year:2013

Pages:1209-1217

Language:Chinese

ISSN:02543087

CODEN:YYXUDY

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:A multi-mode combined timing device was designed based on multi-scale data fusion theory, which can output the time frequency signal with higher precision by combining the GPS, GLONAS and Beidou timing signals. Firstly, the GPS, GLONAS and Beidou timing signals are decomposed respectively in different wavelet scales. Secondly, the wavelet coefficients of these signals in the same scale are synthesized with wavelet weighting method scale by scale. Thirdly, inverse wavelet transform is used to reconstruct the signal that represents the timescale. The new timescale is in step with UTC theoretically. Test result shows that after disciplining the local oscillators, the frequency stability of the device reaches to 10-12, which is higher than that of the single-mode device by one order of magnitude.

Number of references:15

Main heading:Signal processing

Controlled terms:Data fusion - Radio navigation - Timing devices - Wavelet transforms

Uncontrolled terms:Combined timing - Different wavelets - Inverse wavelet transforms - Local oscillators - Multi-scale datum - Time frequency signals - Wavelet coefficients - Weighting methods

Classification code:716.1 Information Theory and Signal Processing - 716.3 Radio Systems and Equipment - 723.2 Data Processing and Image Processing - 921.3 Mathematical Transformations - 943.3 Special Purpose Instruments

Database:Compendex

Accession number:20134116829548

Title:Research on the trends of photonic crystal polarization maintaining fibers

Authors:Zhang, Chen-Yang (1); Shi, Teng-Fei (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an, 710119, China; (2) Chinese Academy of Sciences, Beijing, 10039, China

Source title:Applied Mechanics and Materials

Abbreviated source title:Appl. Mech. Mater.

Volume:380-384

Monograph title:Vehicle, Mechatronics and Information Technologies

Issue date:2013

Publication year:2013

Pages:4391-4394

Language:English

ISSN:16609336

E-ISSN:16627482

ISBN-13:9783037858202

Document type:Conference article (CA)

Conference name:2013 International Conference on Vehicle and Mechanical Engineering and Information Technology, VMEIT 2013

Conference date:August 17, 2013 - August 18, 2013

Conference location:Zhengzhou, Henan, China

Conference code:99783

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:Based on a large number of domestic and foreign literatures, we Put forward that the global polarization maintaining structure PM-PCF is the future development trend. The PM-PCF preform manufacture and drawing process were detailedly analyzed and summarized in this paper. And the development difficulties of the PM-PCF were analyzed in-deep. © (2013) Trans Tech Publications, Switzerland.

Number of references:7

Main heading:Information technology

Controlled terms:Automobile manufacture - Optical fiber fabrication - Photonic crystal fibers - Photonic crystals - Polarization-maintaining fiber

Uncontrolled terms:Development trends - Drawing process - Global polarizations - High birefringence

Classification code:662.1 Automobiles - 741.1.2 Fiber Optics - 741.3 Optical Devices and Systems - 903 Information Science

DOI:10.4028/www.scientific.net/AMM.380-384.4391

Database:Compendex

Accession number:20134716995631

Title:Building holistic descriptors for scene recognition: A multi-objective genetic programming approach

Authors:Liu, Li (1); Shao, Ling (1); Li, Xuelong (2)

Author affiliation:(1) Department of Electronic and Electrical Engineering, University of Sheffield, Sheffield, S1 3JD, United Kingdom; (2) State Key Laboratory of Transient Optics and Photonics, XIOPM, Chinese Academy of Sciences, Xi'an, 710119, China

Source title:MM 2013 - Proceedings of the 2013 ACM Multimedia Conference

Abbreviated source title:MM - Proc. ACM Multimedia Conf.

Monograph title:MM 2013 - Proceedings of the 2013 ACM Multimedia Conference

Issue date:2013

Publication year:2013

Pages:997-1005

Language:English

ISBN-13:9781450324045

Document type:Conference article (CA)

Conference name:21st ACM International Conference on Multimedia, MM 2013

Conference date:October 21, 2013 - October 25, 2013

Conference location:Barcelona, Spain

Conference code:100792

Sponsor:ACM SIGMM

Publisher:Association for Computing Machinery, General Post Office, P.O. Box 30777, NY 10087-0777, United States

Abstract:Real-world scene recognition has been one of the most challenging research topics in computer vision, due to the tremendous intra- class variability and the wide range of scene categories. In this paper, we successfully apply an evolutionary methodology to automatically synthesize domain-adaptive holistic descriptors for the task of scene recognition, instead of using hand-tuned descriptors. We address this as an optimization problem by using multi-objective genetic programming (MOGP). Specifically, a set of primitive operators and filters are first randomly assembled in the MOGP frame- work as tree-based combinations, which are then evaluated by two objective fitness criteria i.e., the classification error and the tree complexity. Finally, the best-so-far solution selected by MOGP is regarded as the (near-)optimal feature descriptor for scene recognition. We have evaluated our approach on three realistic scene datasets: MIT urban and nature, SUN and UIUC Sport. Experimental results consistently show that our MOGP-generated de- scriptors achieve significantly higher recognition accuracies com- pared with state-of-the-art hand-crafted and machine-learned features. Copyright © 2013 ACM.

Number of references:24

Main heading:Genetic algorithms

Controlled terms:Genetic programming - Multiobjective optimization

Uncontrolled terms:Classification errors - Feature descriptors - Multi objective - Optimization problems - Primitive operator - Recognition accuracy - Scene categories - Scene recognition

Classification code:723 Computer Software, Data Handling and Applications - 723.1 Computer Programming - 921 Mathematics - 921.5 Optimization Techniques

DOI:10.1145/2502081.2502095

Database:Compendex

Accession number:20135117095030

Title:Linear tracking for 3-D medical ultrasound imaging

Authors:Huang, Qing-Hua (1); Yang, Zhao (2); Hu, Wei (1); Jin, Lian-Wen (2); Wei, Gang (1); Li, Xuelong (3)

Author affiliation:(1) Guangdong Provincial Key Laboratory of Short-Range Wireless Detection and Communication, School of Electronic and Information Engineering, South China University of Technology, Guangzhou 510006, China; (2) School of Electronic and Information Engineering, South China University of Technology, Guangzhou 510006, China; (3) Center for Optical Imagery Analysis and Learning, State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Xi'an 710119, China

Source title:IEEE Transactions on Cybernetics

Abbreviated source title:IEEE Trans. Cybern.

Volume:43

Issue:6

Issue date:December 2013

Publication year:2013

Pages:1747-1754

Article number:6412786

Language:English

ISSN:21682267

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., 445 Hoes Lane / P.O. Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:As the clinical application grows, there is a rapid technical development of 3-D ultrasound imaging. Compared with 2-D ultrasound imaging, 3-D ultrasound imaging can provide improved qualitative and quantitative information for various clinical applications. In this paper, we proposed a novel tracking method for a freehand 3-D ultrasound imaging system with improved portability, reduced degree of freedom, and cost. We designed a sliding track with a linear position sensor attached, and it transmitted positional data via a wireless communication module based on Bluetooth, resulting in a wireless spatial tracking modality. A traditional 2-D ultrasound probe fixed to the position sensor on the sliding track was used to obtain real-time B-scans, and the positions of the B-scans were simultaneously acquired when moving the probe along the track in a freehand manner. In the experiments, the proposed method was applied to ultrasound phantoms and real human tissues. The results demonstrated that the new system outperformed a previously developed freehand system based on a traditional six-degree-of-freedom spatial sensor in phantom and in vivo studies, indicating its merit in clinical applications for human tissues and organs. © 2013 IEEE.

Number of references:20

Main heading:Ultrasonic imaging

Controlled terms:Histology - Probes - Sensors - Tissue - Ultrasonics - Wireless telecommunication systems

Uncontrolled terms:3-D ultrasound - Application systems - Degree of freedom - Spatial tracking - Volume reconstruction

Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 801 Chemistry - 753.1 Ultrasonic Waves - 717 Optical Communication - 716 Telecommunication; Radar, Radio and Television - 461.2 Biological Materials and Tissue Engineering

DOI:10.1109/TSMCC.2012.2229270

Database:Compendex

Accession number:20134216849774

Title:Single image super-resolution with multiscale similarity learning

Authors:Zhang, Kaibing (1); Gao, Xinbo (2); Tao, Dacheng (3); Li, Xuelong (4)

Author affiliation:(1) School of Computer and Information Science, Hubei Engineering University, Xiaogan 432000, China; (2) School of Electronic Engineering, Xidian University, Xi'an 710071, China; (3) Centre for Quantum Computation and Intelligent Systems, Faculty of Engineering and Information Technology, University of Technology, Sydney, Ultimo, NSW 2007, Australia; (4) Center for Optical Imagery Analysis and Learning, State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Xi'an 710119, China

Source title:IEEE Transactions on Neural Networks and Learning Systems

Abbreviated source title:IEEE Trans. Neural Networks Learn. Sys.

Volume:24

Issue:10

Issue date:2013

Publication year:2013

Pages:1648-1659

Article number:6553199

Language:English

ISSN:2162237X

E-ISSN:21622388

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., 445 Hoes Lane / P.O. Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:Example learning-based image super-resolution (SR) is recognized as an effective way to produce a high-resolution (HR) image with the help of an external training set. The effectiveness of learning-based SR methods, however, depends highly upon the consistency between the supporting training set and low-resolution (LR) images to be handled. To reduce the adverse effect brought by incompatible high-frequency details in the training set, we propose a single image SR approach by learning multiscale self-similarities from an LR image itself. The proposed SR approach is based upon an observation that small patches in natural images tend to redundantly repeat themselves many times both within the same scale and across different scales. To synthesize the missing details, we establish the HR-LR patch pairs using the initial LR input and its down-sampled version to capture the similarities across different scales and utilize the neighbor embedding algorithm to estimate the relationship between the LR and HR image pairs. To fully exploit the similarities across various scales inside the input LR image, we accumulate the previous resultant images as training examples for the subsequent reconstruction processes and adopt a gradual magnification scheme to upscale the LR input to the desired size step by step. In addition, to preserve sharper edges and suppress aliasing artifacts, we further apply the nonlocal means method to learn the similarity within the same scale and formulate a nonlocal prior regularization term to well pose SR estimation under a reconstruction-based SR framework. Experimental results demonstrate that the proposed method can produce compelling SR recovery both quantitatively and perceptually in comparison with other state-of-the-art baselines. © 2013 IEEE.

Number of references:57

Main heading:Learning systems

Controlled terms:Algorithms - Optical resolving power

Uncontrolled terms:High resolution image - Image super-resolution - Low resolution images - Neighbor embedding - Non local means (NLM) - Reconstruction process - Regularization terms - Self-similarities

Classification code:723 Computer Software, Data Handling and Applications - 741.1 Light/Optics - 921 Mathematics

DOI:10.1109/TNNLS.2013.2262001

Database:Compendex

Accession number:20133016543319

Title:Mechanical passive compensation for athermalisation design of infrared optical system

Authors:Zhang, Zhi (1); Zhang, Zhaohui (1); Fan, Zheyuan (1); Yan, Aqi (1); Zhang, Jian (1); Yang, Hongtao (1); Cao, Jianzhong (1)

Author affiliation:(1) Xi'an Institute Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710049, China

Source title:Key Engineering Materials

Abbreviated source title:Key Eng Mat

Volume:552

Monograph title:Advances in Optics Manufacture

Issue date:2013

Publication year:2013

Pages:93-96

Language:English

ISSN:10139826

CODEN:KEMAEY

ISBN-13:9783037856918

Document type:Conference article (CA)

Conference name:Asia Pacific Conference on Optics Manufacture 2012, APCOM 2012

Conference date:August 26, 2012 - August 28, 2012

Conference location:Changchun, China

Conference code:97919

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:Optical equipments especially those for aerospace application are expected to work over a wide temperature range. The change of temperature could cause the refractive index change of infrared glass elements. Furthermore, it would lead to the defocus of the image surface and the performance degradation, so the method of temperature compensation must be adopted, which could make sure that optical system would adapt to the change of ambient temperature. A method of temperature compensation with mechanical passive compensation is briefly described, and an example is also given. The quality of image could be optimized through mechanical passive compensation, depending on the differences of metal and non-metallic thermal expansion coefficient. The results show that the optical system works stablely in the designed temperature range. It is of great importance to the athermalisation design of infrared optical system. © (2013) Trans Tech Publications, Switzerland.

Number of references:9

Main heading:Optical systems

Controlled terms:Aerospace applications - Design - Manufacture - Temperature distribution

Uncontrolled terms:Athermalisation - Infrared optical systems - Performance degradation - Refractive index changes - Temperature compensation - Thermal compensation - Thermal expansion coefficients - Wide temperature ranges

Classification code:408 Structural Design - 537.1 Heat Treatment Processes - 641.1 Thermodynamics - 652 Aircraft and Avionics - 655 Spacecraft - 741.3 Optical Devices and Systems

DOI:10.4028/www.scientific.net/KEM.552.93

Database:Compendex

Accession number:20133016530690

Title:An improved method based on fast bilateral filter for high dynamic image rendering

Authors:Zhang, Hui (1); Wang, Hua (1); Cao, Jian Zhong (1); Zhao, Xiao Dong (1); Lei, Yang Jie (1); Liu, Guang Sen (1)

Author affiliation:(1) Xi'an institute Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Source title:Advanced Materials Research

Abbreviated source title:Adv. Mater. Res.

Volume:710

Monograph title:Advanced Technologies and Solutions in Industry

Issue date:2013

Publication year:2013

Pages:665-669

Language:English

ISSN:10226680

ISBN-13:9783037857205

Document type:Conference article (CA)

Conference name:2013 International Conference on Advanced Technologies and Solutions in Industry, ICATSI 2013

Conference date:March 22, 2013 - March 23, 2013

Conference location:Taiyuan, Shanxi, China

Conference code:97849

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:This paper presents an improved high dynamic range image tone mapping method based on fast bilateral filtering. The algorithm first applied a bilateral filtering to the luminance channel of the image, the image is decomposed into an HDR base layer and an LDR detail layer. Then the HDR base layer is blurred with bilateral filtering again, get the details portion of the base layer, at the same time the dynamic range of the global base layer is compressed. Finally, the detail component and the compressed HDR base layer are recombined and the result is tone-mapped image for displaying. For color image, the color restoration converts luminance value into RGB color. Experimental results show that the proposed technique performed better than the conventional bilateral filtering, preserving more details and enhancing local contrast, giving decent visual effect and avoiding additional artifacts. © (2013) Trans Tech Publications, Switzerland.

Number of references:5

Main heading:Nonlinear filtering

Controlled terms:Image enhancement - Luminance

Uncontrolled terms:Bilateral filtering - Bilateral filters - Color restoration - Fast bilateral filtering - High dynamic - High dynamic range images - Luminance value - Tone-mapping

Classification code:731.1 Control Systems - 741 Light, Optics and Optical Devices - 741.1 Light/Optics

DOI:10.4028/www.scientific.net/AMR.710.665

Database:Compendex

Accession number:20134216857710

Title:Solid-state ultrafast all-optical x-ray imaging sensor enabling picosecond temporal resolution

Authors:Wang, Bo (1); Bai, Yonglin (1); Xu, Peng (1); Liu, Baiyu (1); Zhu, Bingli (1); Yang, Wenzheng (1); Bai, Xiaohong (1); Qin, Junjun (1); Gou, Yongsheng (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an 710119, China; (2) Graduate School of CAS, Beijing 100039, China

Corresponding author:Wang, B.

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8908

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Sensors and Applications

Issue date:2013

Publication year:2013

Article number:89082C

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497772

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:Here we report an ultrafast x-ray imaging sensor based on optical measurement of the effects of x-ray absorption and electron hole pair creation in a direct band-gap semiconductor. Our results indicate that this technology can be used to provide a new approach for x-ray detectors and x-ray imaging systems with picosecond temporal resolution at x-ray energies ~10 keV. The x-ray absorption in GaAs produces a transient, non-equilibrium, electron-hole pair distribution which is then sensed by the phase modulation of the optical probe beam. The basic physics of the detector, implementation considerations, and preliminary experimental data are presented and discussed. Through further development, this x-ray imaging sensor could provide insight into previously unmeasurable phenomena in many fields. © 2013 SPIE.

Number of references:7

Main heading:X ray analysis

Controlled terms:Detectors - Image resolution - Optical data processing - Phase modulation - Probes - X ray absorption

Uncontrolled terms:Band-gap semiconductors - Electron hole pairs - Optical measurement - Preliminary experimental data - Probe laser - Temporal resolution - X ray imaging system - Xray imaging

Classification code:951 Materials Science - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 914 Safety Engineering - 801 Chemistry - 742 Cameras and Photography - 741.3 Optical Devices and Systems - 741 Light, Optics and Optical Devices - 716 Telecommunication; Radar, Radio and Television - 711 Electromagnetic Waves - 421 Strength of Building Materials; Mechanical Properties

DOI:10.1117/12.2034893

Database:Compendex

Accession number:20132816483983

Title:Design, fabrication and characteristics of cyclic olefin copolymers lens for terahertz application

Authors:Ji, Jiangjun (1); Fan, Wenhui (1); Kong, Depeng (1); Wang, Lili (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Ji, J.(jjjhit@163.com)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:42

Issue:5

Issue date:May 2013

Publication year:2013

Pages:1212-1217

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:The refractive index and absorption features of a novel polymer-cyclic olefin copolymers(trade names Topas COC) were studied in 0.1-3 THz band. With SolidWorks software, a common double-convex spherical lens of 100 mm focal length with effective aperture of 1.75 inches was designed, and then a set of mold for manufacturing the lens was designed. By hot compression molding, the Topas COC terahertz lens was fabricated, and the effects of heating temperature and time on the lens surface morphology was analyzed. The effects of the wavelength, thickness, radius of curvature and refractive index on focal length of the lens in the terahertz wavelength of 150 μm, 300 μm and 600 μm was simulated and analyzed by using Zemax software. Studies have shown that the lens made by this method has surface smooth, high accuracy and defect-free structure, so the performance is very superior and meets linear and compact requirements of the terahertz system, and plays the role of collimating and focusing in the visible region and terahertz band.

Number of references:9

Main heading:Refractive index

Controlled terms:Compression molding - Copolymers - Hot pressing - Olefins - Surface defects

Uncontrolled terms:Absorption features - Cyclic Olefin Copolymers - Focal lengths - Heating temperatures - Radius of curvature - Terahertz applications - Terahertz lens - Topas COC

Classification code:951 Materials Science - 816.1 Processing of Plastics and Other Polymers - 815.1 Polymeric Materials - 812.1 Ceramics - 804.1 Organic Compounds - 741.1 Light/Optics - 421 Strength of Building Materials; Mechanical Properties

Database:Compendex

Accession number:20134416937715

Title:A method for eliminating zero-order image in digital holograph based on contourlet transform

Authors:Zhang, Yu Fei (1); Wu, Yi Quan (2)

Author affiliation:(1) College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an, 710119, China

Source title:Advanced Materials Research

Abbreviated source title:Adv. Mater. Res.

Volume:760-762

Monograph title:Optoelectronics Engineering and Information Technologies in Industry

Issue date:2013

Publication year:2013

Pages:80-83

Language:English

ISSN:10226680

ISBN-13:9783037857731

Document type:Conference article (CA)

Conference name:2nd International Conference on Opto-Electronics Engineering and Materials Research, OEMR 2013

Conference date:October 19, 2013 - October 20, 2013

Conference location:Zhengzhou, Henan, China

Conference code:100390

Sponsor:Computer Science and Electronic Technology; Trans tech publications inc.; National Cheng Kung University

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:In the reconstruction process of digital holograph, zero-order image has a bad impact on the quality of real image. In this paper, a new way to eliminate zero-order image in digital holography is proposed. Firstly, digital holography image is decomposed by contourlet transform, then remove the low frequency. The new digital holography image is obtained by inverse contourlet transform. Experiments show that, compared with spatial filtering, frequency domain filtering, laplacian filtering and eliminate zero-order image method based on wavelet, the new method proposed in this paper can eliminate zero-order image better, what's more, the real image is also strengthened in some way. © (2013) Trans Tech Publications, Switzerland.

Number of references:5

Main heading:Computer generated holography

Controlled terms:Electronics engineering - Information technology

Uncontrolled terms:Contourlet transform - Digital holograph - Digital holography - Frequency-domain filtering - Real images - Reconstruction process - Spatial filterings - Zero-order image

Classification code:723.5 Computer Applications - 718 Telephone Systems and Related Technologies; Line Communications - 717 Optical Communication - 903 Information Science - 716 Telecommunication; Radar, Radio and Television - 714 Electronic Components and Tubes - 713 Electronic Circuits - 715 Electronic Equipment, General Purpose and Industrial

DOI:10.4028/www.scientific.net/AMR.760-762.80

Database:Compendex

Accession number:20130816035549

Title:Study on coherent dynamics of alkali metal atomic wave packets

Authors:Zhu, Changjun (1); He, Junfang (2)

Author affiliation:(1) Department of Physics, School of Science, Xi'an Polytechnic University, Xi'an 710048, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Xi'an 710119, China

Corresponding author:Zhu, C.(cjzhu@xpu.edu.cn)

Source title:Key Engineering Materials

Abbreviated source title:Key Eng Mat

Volume:538

Monograph title:Progress in Functional Materials

Issue date:2013

Publication year:2013

Pages:285-288

Language:English

ISSN:10139826

CODEN:KEMAEY

ISBN-13:9783037855737

Document type:Conference article (CA)

Conference name:2nd International Conference on Optical, Electronic and Electrical Materials, OEEM 2012

Conference date:August 5, 2012 - August 7, 2012

Conference location:Shanghai, China

Conference code:95509

Sponsor:Trans Tech Publications; Changzhou University; Ministry of Science and Technology of China

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:A theoretical model consisting of 5 energy levels, with the three upper states coherently excited, was proposed to analyze the coherent characteristics of atomic wave packets using perturbative theory. Pump-probe technique was implemented to detect coupled difference frequency four-wave mixing processes for studying the coherent characteristics of Rb atomic wave packets. Quantum beats were extracted the time domain signal by Fourier transform. Moreover, the variation of quantum beats was gained by time-dependent Fourier transform. The results show that the coherent characteristics of alkali metal atomic wave packets are closely related to quantum beats embedded in the time delayed four-wave mixing signal. Theoretical results are consistent with experimental observations, possessing potential applications in multi-channel information encoding and decoding. © (2013) Trans Tech Publications, Switzerland.

Number of references:6

Main heading:Atoms

Controlled terms:Alkali metals - Four wave mixing - Functional materials - Wave packets

Uncontrolled terms:Atomic wave packets - Coherent dynamics - Difference frequency - Experimental observation - Information encoding - Multi-channel - Potential applications - Pump-probe technique - Quantum beat - Theoretical models - Theoretical result - Time delayed - Time-dependent - Time-domain signal

Classification code:549.1 Alkali Metals - 711.1 Electromagnetic Waves in Different Media - 931.3 Atomic and Molecular Physics - 931.4 Quantum Theory; Quantum Mechanics - 951 Materials Science

DOI:10.4028/www.scientific.net/KEM.538.285

Database:Compendex

Accession number:20132516429250

Title:Design of thermal stable Fabry-Perot etalon for wind measurement

Authors:Sun, Jian (1); Feng, Yu-Tao (1); Bai, Qing-Lan (1); Wang, Yong-Mei (2); Wen, De-Sheng (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) National Space Science Center, Chinese Academy of Sciences, Beijing 100039, China

Corresponding author:Sun, J.(sunjian@opt.ac.cn)

Source title:Guangxue Jingmi Gongcheng/Optics and Precision Engineering

Abbreviated source title:Guangxue Jingmi Gongcheng

Volume:21

Issue:5

Issue date:May 2013

Publication year:2013

Pages:1167-1173

Language:Chinese

ISSN:1004924X

CODEN:GJGOF4

Document type:Journal article (JA)

Publisher:Chinese Academy of Sciences, 140 Renmin Street, Changchun, 130022, China

Abstract:In consideration of the effect of thermal stability of a Fabry-Perot(F-P) etalon in the satellite-borne F-P interferometer on wind measurement, this paper analyzes the thermal stability of the F-P etalon from its construction design including materials, shapes and fixed forms, then, it optimizes the design. With optimization design, the optical elements in the etalon are constructed, which shows that the two plates are all 25 mm thick, and the spacers are all 40° in angles. Then, the dimensions of mechanical structure of the etalon are calculated using flexible structure. Finally, the thermal distortions of optical elements and the etalon are discussed. It shows that the gap dimension changes in the centers of the optical elements and the etalon are 0.64 nm and 0.28 nm and the gap dimension change of the etalon is 0.2 nm when the temperature changes 0.1°C. Furthermore, the airglow spectral lines are ~λ/2250 and ~λ/3150 at 630 nm respectively, and the gap dimension changes of the etalon fall along the radius from the center to the verge. These results demonstrate that optimized structure parameters meet the requirements of measuring accuracy for thermal stability and mechanical stability at a wind velocity of 5 m/s.

Number of references:11

Main heading:Etalons

Controlled terms:Design - Fabry-Perot interferometers - Flexible structures - Optics - Structural optimization - Thermodynamic stability

Uncontrolled terms:Construction design - F-p interferometers - Fabryperot etalons (F-P) - Mechanical structures - Optimization design - Optimized structures - Structure design - Wind measurement

Classification code:408 Structural Design - 408.2 Structural Members and Shapes - 641.1 Thermodynamics - 741.1 Light/Optics - 921.5 Optimization Techniques - 941.3 Optical Instruments

DOI:10.3788/OPE.20132105.1167

Database:Compendex

Accession number:20132916520854

Title:Coordination fault diagnosis based on RBF

Authors:Xu, Rui Hua (1); Wang, Zheng Zhou (1); Yan, Ya Dong (1); Ma, Cai Wen (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision mechanics of CAS, Xi'an, China

Source title:Applied Mechanics and Materials

Abbreviated source title:Appl. Mech. Mater.

Volume:329

Monograph title:Advanced Technologies on Measure and Diagnosis, Manufacturing Systems and Environment Engineering

Issue date:2013

Publication year:2013

Pages:278-282

Language:English

ISSN:16609336

E-ISSN:16627482

ISBN-13:9783037857236

Document type:Journal article (JA)

Conference name:3rd International Conference on Intelligent Structure and Vibration Control, ISVC 2013

Conference date:March 22, 2013 - March 24, 2013

Conference location:Chongqing, China

Conference code:97846

Sponsor:Shanghai Jiao Tong University; Nanyang Normal University; Hebei Polytechnic University; Henan Institute of Science and Technology; Chongqing University of Arts and Sciences; et al

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:In large-scale complex system, The establishment of a fast, accurate fault diagnosis system is more difficult because there exist many uncertain elements between the fault cause and the fault sign.A fault diagnosis system is established based on RBF cloud neural network,the RBR (rule-based reasoning) and the CBR (case-based reasoning).The fault diagnosis system not only has the advantages of self-learning, high accuracy, randomness, fuzziness, etc,and has the advantages of independently of mathematical model,rich knowledge representation, mighty problem solving ability, etc. Theoretical analysis and simulation results show that the system is feasible and effective for fast and accurate fault positioning of complex systems. © (2013) Trans Tech Publications, Switzerland.

Number of references:7

Main heading:Radial basis function networks

Controlled terms:Fault tolerant computer systems - Knowledge representation - Large scale systems - Mathematical models - Neural networks - Problem solving

Uncontrolled terms:Analysis and simulation - CBr - Fault diagnosis systems - Large-scale complex systems - Problem-solving abilities - RBR - Rule based reasoning - Self-learning

Classification code:722.4 Digital Computers and Systems - 723.4 Artificial Intelligence - 921 Mathematics - 961 Systems Science

DOI:10.4028/www.scientific.net/AMM.329.278

Database:Compendex

Accession number:20132416413109

Title:Highly efficient pulse cleaner via nonlinear ellipse rotation in liquid CS<inf>2</inf> for ultrashort pulses

Authors:Liu, H.J. (1); Sun, Q.B. (1); Huang, N. (1); Wen, J. (1); Wang, Z.L. (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics Technology, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Liu, H.J.(liuhongjun@opt.ac.cn)

Source title:Optics Letters

Abbreviated source title:Opt. Lett.

Volume:38

Issue:11

Issue date:June 1, 2013

Publication year:2013

Pages:1838-1840

Language:English

ISSN:01469592

E-ISSN:15394794

CODEN:OPLEDP

Document type:Journal article (JA)

Publisher:Optical Society of America, 2010 Massachusetts Ave, NW, Washington, DC, DC 20036-1023, United States

Abstract:A highly efficient pulse cleaner based on nonlinear ellipse rotation (NER) in a liquid medium of CS<inf>2</inf> is investigated for the temporal contrast enhancement of ultrashort pulses. In theory, a nonlinear transmissivity higher than 60% can be achieved with the temporal contrast improved by about four orders of magnitude, on the condition that the extinction ratio of the polarizer-analyzer pair is better than 104. In a proof of principle experiment, the cleaned pulses at the mJ level with total transmissivity as high as 30% are obtained via NER, in which the temporal contrast is enhanced by about three orders of magnitude. This provides a simple and feasible technology for improving the temporal contrast of an ultrashort and ultraintense laser system in the future. © 2013 Optical Society of America.

Number of references:16

Main heading:Ultrashort pulses

Controlled terms:Liquids

Uncontrolled terms:Extinction ratios - Liquid medium - Orders of magnitude - Proof-of-principle experiments - Temporal contrast - Three orders of magnitude - Transmissivity - Ultra-intense laser systems

Classification code:744.1 Lasers, General - 931.2 Physical Properties of Gases, Liquids and Solids

DOI:10.1364/OL.38.001838

Database:Compendex

Accession number:20140617284718

Title:Design and fabrication of cyclic-olefin copolymer based terahertz hollow-core photonic crystal fiber

Authors:Chen, Qi (1); Zhang, Yi-Xia (1); He, Xiao-Yang (1); Kong, De-Peng (3); Zhang, Jian (1)

Author affiliation:(1) Institute of Electronic Engineering, China Academy of Engineering Physics, Mianyang, China; (2) Terahertz Research Center, China Academy of Engineering Physics, Mianyang, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China

Source title:International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz

Abbreviated source title:Int. Conf. Infrared, Millim., Terahertz Waves, IRMMW-THz

Monograph title:2013 38th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2013

Issue date:2013

Publication year:2013

Article number:6665663

Language:English

ISSN:21622027

E-ISSN:21622035

ISBN-13:9781467347174

Document type:Conference article (CA)

Conference name:2013 38th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2013

Conference date:September 1, 2013 - September 6, 2013

Conference location:Mainz, Germany

Conference code:102316

Sponsor:Ministry of Science and Education of the state; of Rhineland Palatinate; OPTIMAS; Xiton Photonics GmbH; HUBNER

Publisher:IEEE Computer Society, 2001 L Street N.W., Suite 700, Washington, DC 20036-4928, United States

Abstract:In this paper a kind of hollow-core terahertz photonic crystal fiber made of Cyclic-olefin Copolymer with low absorption loss is designed. Results show these fibers are much better than metallic waveguides for their fine transmission properties in terahertz band. Along with the fine flexibility to bend, they are of great importance in application. © 2013 IEEE.

Number of references:3

Main heading:Optical fiber fabrication

Controlled terms:Copolymers - Olefins - Photonic crystal fibers - Terahertz waves

Uncontrolled terms:Absorption loss - Hollow core photonic crystal fiber - Hollow-core - Metallic waveguide - Tera Hertz - Terahertz band - Transmission property

Classification code:711 Electromagnetic Waves - 804.1 Organic Compounds - 812.3 Glass - 815.1 Polymeric Materials - 951 Materials Science

DOI:10.1109/IRMMW-THz.2013.6665663

Database:Compendex

Accession number:20134216860608

Title:An all-optical exclusive-OR gate based on terahertz optical asymmetric demultiplexer-four wave mixing effect

Authors:Duan, Jie (1); Xie, Xiao-Ping (1); Duan, Tao (2); Wen, Yu (1)

Corresponding author:Duan, J.(duanjiedemail@163.com)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:42

Issue:9

Issue date:September 2013

Publication year:2013

Pages:1031-1038

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:In order to solve the three problems of terahertz optical asymmetric demultiplexer-cross phase modulation effect based all-optical exclusive-OR gate, which are that the strict demand of synchronization; cannot be applied in the situation of not return to zero signal input; the speed of exclusive-OR operation is limited by carrier recovery speed of semiconductor optical amplifier. An all-optical exclusive-OR gate was proposed which utilizes the structure of terahertz optical asymmetric demultiplexer and is based on four wave mixing effect, because of based on four wave mixing, this exclusive-OR gate can radically solve the mentioned three problems of terahertz optical asymmetric demultiplexer-cross phase modulation based exclusive-OR gate. This paper illustrates the principle of this exclusive-OR gate through theoretic analyse, and realizes the exclusive-OR operation for the input of 40 Gbps, return to zero signal; 80 Gbps, return to zero signal; 10 Gbps, not return to zero signal. The Q factor and bit error rate of exclusive-OR operation for above three kinds of input are 11.7, 2.4×10-18; 8, 1.1×10-10; 22, 1.3×10-40. And then, we analyse the influence on the quality of exclusive-OR output signal which is generated by change of parameter of main elements of terahertz optical asymmetric demultiplexer and temperature and dispersion effect. The feasibility and effectiveness of this exclusive-OR gate for solving the three problems of terahertz optical asymmetric demultiplexer-cross phase modulation based all-optical exclusive-OR gate are verified by theoretic analyse and simulation.

Number of references:17

Main heading:Problem solving

Controlled terms:Four wave mixing - Phase modulation - Semiconductor optical amplifiers

Uncontrolled terms:Carrier recovery - Dispersion effect - Exclusive-OR - Exclusive-OR gate - Modulation effects - Output signal - Return to zero signals - Terahertz optical asymmetric demultiplexers

Classification code:711.1 Electromagnetic Waves in Different Media - 716 Telecommunication; Radar, Radio and Television - 741.3 Optical Devices and Systems - 921 Mathematics

DOI:10.3788/gzxb20134209.1031

Database:Compendex

Accession number:20134716990012

Title:Mid-infrared fluorotellurite glasses and fibers

Authors:Zhan, Huan (1); Zhang, Aidong (1); He, Jianli (1); Zhou, Zhiguang (1); Li, Lu (1); Lin, Aoxiang (1)

Corresponding author:Lin, A.(aoxiang@opt.ac.cn)

Source title:CLEO: Science and Innovations, CLEO_SI 2013

Abbreviated source title:Sci. Innov.

Monograph title:CLEO: Science and Innovations, CLEO_SI 2013

Issue date:2013

Publication year:2013

Pages:JTu4A.11

Language:English

ISBN-13:9781557529725

Document type:Conference article (CA)

Conference name:CLEO: Science and Innovations, CLEO_SI 2013

Conference date:June 9, 2013 - June 14, 2013

Conference location:San Jose, CA, United states

Conference code:100548

Publisher:Optical Society of American (OSA), 2010 Massachusetts Ave, NW, Washington, DC, DC 20036, United States

Number of references:5

Main heading:Glass

Controlled terms:Metal ions

Uncontrolled terms:Background loss - Fabrication and characterizations - Fluoro-tellurite glass - Midinfrared

Classification code:533 Ore Treatment and Metal Refining - 812.3 Glass

Database:Compendex

Accession number:20134216857673

Title:A deployable telescope imaging system with coilable tensegrity structure for microsatellite application

Authors:Zhao, Chao (1); Li, Chuang (1); Zhou, Nan (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100049, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8908

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Sensors and Applications

Issue date:2013

Publication year:2013

Article number:89081B

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497772

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:Microsatellites will be widely applied as an earth-observing platform in coming future for their low costs. Such satellite missions require optical payloads with low cost, low mass and small volume. In order to meet these requirements, one way is to develop deployable telescopes. They not only maintain the capabilities of the traditional non-deployable telescopes, but also have compacter launch volume and lighter weight. We investigate a telescope with precise deployable structure based on coilable tensegrity. Before launch, the secondary mirror support structure is coiled, and when the satellite is in orbit, the secondary mirror is deployed with the elastic strain energy from the coiled longerons. There are mainly three parts in this paper. Firstly, the telescope optics is presented. A Ritchey-Chretien (RC) type optical system with 150mm aperture is designed. Secondly, the deployable telescope structure is designed for the RC system. The deployable structure mainly consists of coilable longerons, batten rings, and diagonal stringers. The finite element method (FEM) is used to analyze the dynamics of the unfolded telescope structure. Thirdly, the adjusting mechanism for secondary mirror is discussed. Piezoelectric actuators can be used to achieve remote alignment to improve the performance of the imaging system. © 2013 SPIE.

Number of references:7

Main heading:DNA sequences

Controlled terms:Imaging systems - Mirrors - Optical systems - Piezoelectric actuators - Prestressed beams and girders - Space telescopes - Stringers

Uncontrolled terms:Adjusting mechanism - Deployable structure - Deployable telescopes - Elastic strain energy - Micro satellite - Satellite mission - Telescope structures - Tensegrity structure

Classification code:741.3 Optical Devices and Systems - 741 Light, Optics and Optical Devices - 732 Control Devices - 746 Imaging Techniques - 715 Electronic Equipment, General Purpose and Industrial - 461.2 Biological Materials and Tissue Engineering - 408.2 Structural Members and Shapes - 708 Electric and Magnetic Materials

DOI:10.1117/12.2033266

Database:Compendex

Accession number:20140317201730

Title:Research and realization of an anti-noise auto-focusing algorithm

Authors:Zhao, Qinghua (1); Liu, Bo (1); Xu, Zhaohui (1)

Author affiliation:(1) Xi'an Institute of Optics and Precise Mechanics, Chinese Academy Sciences, Xi'an, China; (2) Graduate University, Chinese Academy Sciences, Beijing, China

Source title:Proceedings - 2013 5th International Conference on Intelligent Human-Machine Systems and Cybernetics, IHMSC 2013

Abbreviated source title:Proc. - Int. Conf. Intelligent Hum.-Mach. Syst. Cybern., IHMSC

Volume:2

Monograph title:Proceedings - 2013 5th International Conference on Intelligent Human-Machine Systems and Cybernetics, IHMSC 2013

Issue date:2013

Publication year:2013

Pages:255-258

Article number:6642736

Language:English

ISBN-13:9780769550114

Document type:Conference article (CA)

Conference name:2013 5th International Conference on Intelligent Human-Machine Systems and Cybernetics, IHMSC 2013

Conference date:August 26, 2013 - August 27, 2013

Conference location:Hangzhou, Zhejiang, China

Conference code:101433

Publisher:IEEE Computer Society, 2001 L Street N.W., Suite 700, Washington, DC 20036-4928, United States

Abstract:To solve the problem that the single-peak and sensitivity of conventional image sharpness functions come down which results in slowing auto-focusing speed or even falling to focus because of noise, an anti-noise auto-focusing algorithm is proposed in this paper. The algorithm uses an anti-noise image sharpness function and a searching strategy that combines coarse focusing with fine focusing to improve auto-focusing speed and sensitivity. The experiment shows that the algorithm enhances focusing efficiency and reliability. © 2013 IEEE.

Number of references:15

Main heading:Focusing

Controlled terms:Algorithms - Cybernetics - Image processing

Uncontrolled terms:Anti noise - Auto-focus - Auto-focusing - Efficiency and reliability - Evaluation function - Image sharpness - Searching strategy

Classification code:723 Computer Software, Data Handling and Applications - 723.4 Artificial Intelligence - 741 Light, Optics and Optical Devices - 741.1 Light/Optics - 921 Mathematics

DOI:10.1109/IHMSC.2013.208

Database:Compendex

Accession number:20134216857639

Title:A new primary mirror based on topology optimization

Authors:Wang, Xin (1); Wang, Wei (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100049, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8908

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Sensors and Applications

Issue date:2013

Publication year:2013

Article number:89080D

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497772

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:The impact of the mirror self-weight or other structural stress may cause bad optical imaging quality. The large-diameter primary mirror was optimized based on variable density topology optimization method and in the condition of gravity to satisfy the design requirements. A new primary mirror has been designed, comparing which with the traditional lightweight primary mirror in the method of finite element analysis, the results prove that the new primary mirror is superior to the traditional model in the lightweight rate, surface accuracy and structural rigidity, so the paper puts forward a new idea in the lightweight design. © 2013 SPIE.

Number of references:8

Main heading:Mirrors

Controlled terms:Finite element method - Shape optimization

Uncontrolled terms:lightweight - Lightweight design - Method of finite elements - Primary mirrors - Structural rigidity - Structural stress - Topology Optimization Method - Traditional models

Classification code:741.3 Optical Devices and Systems - 921.5 Optimization Techniques - 921.6 Numerical Methods

DOI:10.1117/12.2032227

Database:Compendex

Accession number:20132216369998

Title:Visual saliency detection using information divergence

Authors:Hou, Weilong (1); Gao, Xinbo (1); Tao, Dacheng (2); Li, Xuelong (3)

Author affiliation:(1) School of Electronic Engineering, Xidian University, 2 South Taibai Road, Xi'an 710071, Shaanxi, China; (2) Centre for Quantum Computation and Intelligent Systems, Faculty of Engineering and Information Technology, University of Technology, Sydney, 235 Jones Street, Ultimo, NSW 2007, Australia; (3) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China

Corresponding author:Tao, D.(dacheng.tao@gmail.com)

Source title:Pattern Recognition

Abbreviated source title:Pattern Recogn.

Volume:46

Issue:10

Issue date:October 2013

Publication year:2013

Pages:2658-2669

Language:English

ISSN:00313203

CODEN:PTNRA8

Document type:Journal article (JA)

Publisher:Elsevier Ltd, Langford Lane, Kidlington, Oxford, OX5 1GB, United Kingdom

Abstract:The technique of visual saliency detection supports video surveillance systems by reducing redundant information and highlighting the critical, visually important regions. It follows that information about the image might be of great importance in depicting the visual saliency. However, the majority of existing methods extract contrast-like features without considering the contribution of information content. Based on the hypothesis that information divergence leads to visual saliency, a two-stage framework for saliency detection, namely information divergence model (IDM), is introduced in this paper. The term "information divergence" is used to express the non-uniform distribution of the visual information in an image. The first stage is constructed to extract sparse features by employing independent component analysis (ICA) and difference of Gaussians (DoG) filter. The second stage improves the Bayesian surprise model to compute information divergence across an image. A visual saliency map is finally obtained from the information divergence. Experiments are conducted on nature image databases, psychological patterns and video surveillance sequences. The results show the effectiveness of the proposed method by comparing it with 13 state-of-the-art visual saliency detection methods. © 2013 Elsevier Ltd. All rights reserved.

Number of references:66

Main heading:Visualization

Controlled terms:Independent component analysis - Security systems

Uncontrolled terms:Bayesian - Difference of Gaussians - Independent component analysis(ICA) - Non-uniform distribution - Saliency detection - Video surveillance systems - Visual Attention - Visual saliency detections

Classification code:723.4 Artificial Intelligence - 902.1 Engineering Graphics - 914.1 Accidents and Accident Prevention

DOI:10.1016/j.patcog.2013.03.008

Database:Compendex

Accession number:20131516204248

Title:Sub-pixel location with phase transfer function for star tracker

Authors:Xi, Jiangbo (1); Song, Zongxi (1); Gao, Wei (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, China; (2) Graduate School of the Chinese Academy of Sciences, Beijing, 100039, China

Corresponding author:Xi, J.(jiangboxi8519@163.com)

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8759

Monograph title:Eighth International Symposium on Precision Engineering Measurements and Instrumentation

Issue date:2013

Publication year:2013

Article number:87590U

Language:English

ISSN:0277786X

CODEN:PSISDG

ISBN-13:9780819495501

Document type:Conference article (CA)

Conference name:8th International Symposium on Precision Engineering Measurements and Instrumentation

Conference date:August 8, 2012 - August 11, 2012

Conference location:Chengdu, China

Conference code:96463

Sponsor:International Committee on Measurements and Instrumentation; National Natural Science Foundation of China; Chinese Society for Measurement; China Instrument and Control Society

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:Star tracker has been widely used as a precise and reliable device for the attitude measuring of a spacecraft. The accuracy of star location will affect the accuracy of star identification and finally the accuracy of attitude measurement. This paper proposed a novel method to locate the star position with the phase transfer function (PTF). The numerical expressions are deduced with the diffraction model of the star point in 1-D and given directly in 2-D. Then calculation is performed and the accuracy is better than 2.1% pixels (SNR=20) with a 3×3 window of airy disk, which is higher than the traditional centroid method. Different sizes of the airy disk from 3 to 6 are simulated with PTF method and we find that the optimal window size is 3 to 5. Finally the Additive Gaussian Noise with SNR from 2 to 40 is introduced to evaluate the novel method and compare it with the traditional centroid method. The accuracy of the new method can reach better than 2.5% pixels and it is much robust than the traditional centroid method, which proves that the method we proposed has a good performance under the noise environment. © 2013 SPIE.

Number of references:13

Main heading:Stars

Controlled terms:Gaussian noise (electronic) - Measurements - Pixels - Precision engineering - Signal to noise ratio - Star trackers - Transfer functions

Uncontrolled terms:Additive Gaussian noise - Attitude measurement - Diffraction models - Noise environments - Optimal window size - Phase transfer functions - Star identification - Sub-pixel locations

Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 921 Mathematics - 741.3 Optical Devices and Systems - 723.5 Computer Applications - 716.1 Information Theory and Signal Processing - 716 Telecommunication; Radar, Radio and Television - 713 Electronic Circuits - 657.2 Extraterrestrial Physics and Stellar Phenomena

DOI:10.1117/12.2015091

Database:Compendex

Accession number:20132116362350

Title:Influence of surface-profile error of larger mirror on aberrations characteristics of optical system

Authors:Pang, Zhihai (1); Fan, Xuewu (1); Chen, Qinfang (1); Ma, Zhen (1); Zou, Gangyi (1)

Author affiliation:(1) Space Optics Laboratory of Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi 710119, China

Corresponding author:Pang, Z.(uestc_pzh@126.com)

Source title:Guangxue Xuebao/Acta Optica Sinica

Abbreviated source title:Guangxue Xuebao

Volume:33

Issue:4

Issue date:April 2013

Publication year:2013

Article number:0422002

Language:Chinese

ISSN:02532239

CODEN:GUXUDC

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:Based on the wavefront aberration theory and the coordinates transform, the influence of surface-profile error of large mirror on aberration characteristic of optical system is analysed. The optical wavefront aberration and surface-profile error of mirror can be expressed as Fringe Zernike polynomial. The surface profile error on the surface of the system aperture diaphragm (exit pupil or entrance pupil) will introduce constant wavefront aberration coefficient in the full field by analysing the transformation matrix. The error on a surface not at pupil will lead lower order wavefront aberration coefficient in the optical system, the relation between different wavefront aberrations coefficient and fields is different, and the location zero for the lower aberration coefficient always resides at the center of the field of view. The result shows that it's possible to analyse the wavefront aberration caused by surface-profile error of the reflective mirror using coordinate transformation matrix for improving the efficiency of the alignment.

Number of references:15

Main heading:Optical systems

Controlled terms:Aberrations - Linear transformations - Mirrors - Optical design

Uncontrolled terms:Aberration coefficients - Co-ordinate transformation - Coordinates transform - Surface profiles - Three-mirror anastigmatic systems - Transform matrices - Transformation matrices - Wavefront aberrations

Classification code:741 Light, Optics and Optical Devices - 921.3 Mathematical Transformations

DOI:10.3788/AOS201333.0422002

Database:Compendex

Accession number:20134516948949

Title:Fusion of infrared and visible image based on target extraction and contourlet transform

Authors:Zhao, Bingjie (1); Gao, Wei (1); Song, Zongxi (1); Wang, Qi (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100039, China

Corresponding author:Zhao, B.(zhaobingjie6963@126.com)

Source title:Journal of Information and Computational Science

Abbreviated source title:J. Inf. Comput. Sci.

Volume:10

Issue:15

Issue date:October 10, 2013

Publication year:2013

Pages:4751-4761

Language:English

ISSN:15487741

Document type:Journal article (JA)

Publisher:Binary Information Press, Flat F 8th Floor, Block 3, Tanner Garden, 18 Tanner Road, Hong Kong

Abstract:The fusion of the infrared and visible images has been widely used in object recognition, night vision and military affairs, which is a popular research field. A new image fusion method based on target extraction and contourlet transform is proposed in this paper. Commonly, the traditional image fusion method neglect differences between the targets and background of the infrared and visible images, resulting in the poor distinct or weak identification of the fused image. In order to take full advantage of the differences, we extract firstly the interested targets of infrared image, which are fused with the visible image by the method of regional similarity. Therefore we obtain a new visible image with more target information, while reserve the visible background information. Secondly, to obtain more complementary information, contourlet transform is utilized to fuse the new visible image and the source infrared image. In addition, based on the different characters of low frequency and high frequency coefficients, we choose different rules to fuse the contourlet coefficients. In low frequency processing, the method based on the fuzzy theory is used, while we ascertain the high fusion coefficients by the Tenenbaum's algorithm. Experiments are carried out and the results show that our method is effective and the fused images are better than those resulting from wavelet transform and contourlet transform both in visual quality and in quantitative evaluations. © 2013 Binary Information Press.

Number of references:12

Main heading:Military photography

Controlled terms:Extraction - Image fusion - Infrared imaging - Object recognition

Uncontrolled terms:Contourlet transform - Fuzzy theory - Regional similarities - Target extraction - Visible image

Classification code:404.1 Military Engineering - 716 Telecommunication; Radar, Radio and Television - 723.2 Data Processing and Image Processing - 746 Imaging Techniques - 802.3 Chemical Operations

DOI:10.12733/jics20102267

Database:Compendex

Accession number:20134216857631

Title:The realization of network video monitoring system

Authors:Hou, Zhuo-Wei (1); Qiu, Yue-Hong (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8908

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Sensors and Applications

Issue date:2013

Publication year:2013

Article number:890804

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497772

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:The paper presents a network video monitoring system based on field programmable gate array to implement the real time acquisition and transmission of video signals. The system includes image acquisition module, central control module and Ethernet transmission module. According to request, Cyclone FPGA is taken as the control center in the system, using Quartus II and Nios II IDE as development tool to build the hardware development platform. A kind of embedded hardware system is built based on SOPC technic, in which the Nios II soft-core and other controllers are combined by configuration. Meanwhile, the μClinux is used as embedded operating system to make the process of acquisition and transmission of the data picture on the Internet more reliable. In order to fulfill the task of MAC and PHY, the fast Ethernet controller should be connected to the SOPC. TCP/IP protocol is used to implement data transmission. Based on TCP/IP protocol, the Web Servers should be embedded to implement the protocol of HTTP, TCP and UDP. Through the research of the thesis, with programmable logic device being the core and network being the transmission media, the design scheme of the video monitoring system is presented. The hardware's design is mainly done in the thesis. The principal and function of the system is deeply explained, so it can be the important technology and specific method. © 2013 SPIE.

Number of references:4

Main heading:Transmission control protocol

Controlled terms:Ethernet - Field programmable gate arrays (FPGA) - Hardware - HTTP - Hypertext systems - Logic devices - Monitoring - Storms

Uncontrolled terms:Central control module - Embedded operating systems - Network video monitoring - NIOS II - Programmable logic device - Real time acquisition - SOPC - Video monitoring systems

Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 723 Computer Software, Data Handling and Applications - 722.3 Data Communication, Equipment and Techniques - 721.2 Logic Elements - 605 Small Tools and Hardware - 443.3 Precipitation

DOI:10.1117/12.2031629

Database:Compendex

Accession number:20133016544404

Title:Flexible optical clock recovery utilizing a multi-function semiconductor fiber laser

Authors:Feng, H. (1); Zhao, W. (1); Xie, X.P. (1); Qian, F.C. (1); Wang, W. (1); Huang, X. (1); Hu, H. (1)

Source title:Laser Physics

Abbreviated source title:Laser Phys.

Volume:23

Issue:8

Issue date:August 2013

Publication year:2013

Article number:085109

Language:English

ISSN:1054660X

E-ISSN:15556611

Document type:Journal article (JA)

Publisher:Institute of Physics Publishing, Temple Circus, Temple Way, Bristol, BS1 6BE, United Kingdom

Abstract:We demonstrate a multi-function fiber laser based on cross-gain modulation in a semiconductor optical amplifier (SOA). Depending on the input signals, the fiber cavity can emit a continuous wave (CW) laser, mode-locked pulses, or act as a clock recovery device. With an extra CW light overcoming the pattern effect in the clock recovery process, a 10-GHz synchronous clock sequence with <0.1 power fluctuation and <120-fs timing jitter is extracted from the transmission return-to-zero data stream. We further analyze the recovered clock properties as a function of the input signal, and find that the clock recovery system presents good stability over a large range of input signal characteristics. The multi-function fiber laser exhibits the advantages of compact configuration and low cost, which is very convenient and attractive for optical communications and signal processing. © 2013 Astro Ltd.

Number of references:28

Main heading:Electric clocks

Controlled terms:Fiber lasers - Mode-locked fiber lasers - Optical communication - Signal processing - Timing jitter

Uncontrolled terms:Cross gain modulation - Mode-locked pulse - Optical clock recovery - Power fluctuations - Return-to-zero data streams - Semiconductor fiber lasers - Signal characteristic - Synchronous clocks

Classification code:744.1 Lasers, General - 718 Telephone Systems and Related Technologies; Line Communications - 717.1 Optical Communication Systems - 744.4 Solid State Lasers - 717 Optical Communication - 716 Telecommunication; Radar, Radio and Television - 704.2 Electric Equipment - 716.1 Information Theory and Signal Processing

DOI:10.1088/1054-660X/23/8/085109

Database:Compendex

Accession number:20134416940653

Title:A doubly-scale adaptive non-local means image denoising algorithm

Authors:Zhao, Jingjuan (1); Zhou, Zuofeng (1); Cao, Jianzhong (1); Wang, Hua (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics Chinese Academy of Science, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Zhao, J.(zhaojingjuan@opt.cn)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:42

Issue:SUPPL.1

Issue date:2013

Publication year:2013

Pages:219-224

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:By analyzing the effect of parameter of the original non-local means (NLM) and the classification error problems which exist in several improved pixel-classification-based adaptive NLM in image denoising application, a doubly-scale adaptive NLM image denoising algorithm is proposed. The proposed algorithm first use NLM-based 'roughly denoising' mainly on the smooth regions with large-scale similarity window and search window; and then regard the firstly roughly 'less denoisied' image as containing totally texture regions, and apply the second NLM-based 'finely denoising' with small-scale similarity window and search window mainly on these texture regions to get the final adaptive denoising result. Experimental results demonstrate the great superiority of the proposed algorithm to the original NLM algorithm, and the certain advantage over the several improved NLM algorithms.

Number of references:13

Main heading:Image denoising

Controlled terms:Algorithms - Textures

Uncontrolled terms:Adaptive - Doubly scale - Image denoisng - Method noise - Non-local means

Classification code:723 Computer Software, Data Handling and Applications - 723.2 Data Processing and Image Processing - 921 Mathematics - 933 Solid State Physics

Database:Compendex

Accession number:20133416639631

Title:Graphene and nanotube mode-locked fiber laser emitting dissipative and conventional solitons

Authors:Cui, Yudong (1); Liu, Xueming (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Liu, X.(liuxm@opt.ac.cn)

Source title:Optics Express

Abbreviated source title:Opt. Express

Volume:21

Issue:16

Issue date:August 12, 2013

Publication year:2013

Pages:18969-18974

Language:English

E-ISSN:10944087

Document type:Journal article (JA)

Publisher:Optical Society of America, 2010 Massachusetts Ave, NW, Washington, DC, DC 20036-1023, United States

Abstract:We propose a bidirectional erbium-doped fiber laser modelocked with a mixture of graphene and single-walled carbon nanotubes for the first time to our best knowledge. The fiber laser can deliver dissipative soliton (DS) and conventional soliton (CS), circulating in opposite directions. The net-cavity dispersion is normal in the clockwise direction and anomalous in counter clockwise direction, respectively, and then DS and CS are generated with the suitable adjustment of attenuators. The output DS and CS approximately have the same central wavelength, but exhibit different optical spectra, pulse durations, and repetition rates. The all-fiber switchable laser can provide two different pulse sources, which is convenient for practical applications. © 2013 Optical Society of America.

Number of references:31

Main heading:Solitons

Controlled terms:Clocks - Fiber lasers - Graphene - Pulse repetition rate - Single-walled carbon nanotubes (SWCN)

Uncontrolled terms:Central wavelength - Counter-clockwise - Dissipative solitons - Erbium doped fiber laser - Optical spectra - Pulse durations - Pulse sources - Repetition rate

Classification code:744.1 Lasers, General - 744.4 Solid State Lasers - 761 Nanotechnology - 804 Chemical Products Generally - 931.3 Atomic and Molecular Physics - 943.3 Special Purpose Instruments

DOI:10.1364/OE.21.018969

Database:Compendex

Accession number:20134016803265

Title:Solid-state YVO<inf>4</inf>/Nd:YVO<inf>4</inf>/KTP green laser system for the generation of subnanosecond pulses with adjustable kilohertz repetition rate

Authors:Zhang, Haijuan (1); Zhao, Shengzhi (1); Yang, Kejian (1); Li, Guiqiu (1); Li, Dechun (1); Zhao, Jia (1); Wang, Yonggang (2)

Author affiliation:(1) School of Information Science and Engineering, Shandong University, 27 Shanda South Road, Jinan 250100, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Zhao, S.(Shengzhi_zhao@sdu.edu.cn)

Source title:Applied Optics

Abbreviated source title:Appl. Opt.

Volume:52

Issue:27

Issue date:September 20, 2013

Publication year:2013

Pages:6776-6781

Language:English

ISSN:1559128X

E-ISSN:15394522

CODEN:APOPAI

Document type:Journal article (JA)

Publisher:Optical Society of American (OSA)

Abstract:A solid-state green laser generating subnanosecond pulses with adjustable kilohertz repetition rate is presented. This pulse laser system is composed of a Q-switched and mode-locked YVO4/Nd:YVO4/KTP laser simultaneously modulated by an electro-optic (EO) modulator and a central semiconductor saturable absorption mirror. Because the repetition rate of the Q-switched envelope in this laser depends on the modulation frequency of the EO modulator, so long as the pulsewidth of the Q-switched envelope is shorter than the cavity roundtrip transmit time, i.e., the time interval of two neighboring mode-locking pulses, only one mode-locking pulse exists underneath a Q-switched envelope, resulting in the generation of subnanosecond pulses with kilohertz repetition rate. The experimental results show that the pulsewidth of subnanosecond pulses decreases with increasing pump power and the shortest pulse generated at 1 kHz was 450 ps with pulse energy as high as 252 μJ, corresponding to a peak power of 560 kW. In addition, this laser was confirmed to have high stability, and the pulse repetition rate could be freely adjusted from 1 to 4 kHz. © 2013 Optical Society of America.

Number of references:24

Main heading:Pulse generators

Controlled terms:Locks (fasteners) - Mode-locked fiber lasers - Optical pumping - Q switched lasers - Q switching

Uncontrolled terms:Electro-optic modulators - Modulation frequencies - Pulse energies - Pulse laser system - Q-switched envelopes - Repetition rate - Semiconductor saturable absorption mirror - Sub-nanosecond pulse

Classification code:601.3 Mechanisms - 713.4 Pulse Circuits - 741.1 Light/Optics - 744.1 Lasers, General - 744.8 Laser Beam Interactions

DOI:10.1364/AO.52.006776

Database:Compendex

Accession number:20141317501113

Title:Optimal design of a new type space laser communication optical system

Authors:Yan, Pei-Pei (1); Deng, Xiao-Guo (1); Zhang, Heng-Jin (1)

Author affiliation:(1) Photoelectric Measurement and Control Technology Research Department, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy Sciences, Xi'an, 710119, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8906

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Laser Communication Technologies and Systems

Issue date:2013

Publication year:2013

Article number:890602

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497758

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:A design of a laser communications optical system with high transmitting and receiving performance is given. The traditional on-axis Cassegrain optical antenna has the default that the transmitting and receiving power decreased greatly because of the obscuration of the secondary mirror. Considering that the eccentric-pupil Cassegrain optical antenna is designed. The optical antenna system in transceiver has been designed by means of CODEV software. It improves the efficiency of transmitting and receiving power effectively. Its properties have been analyzed, such as gain, image quality, and transmission efficiency. Meanwhile, the materials of optical elements have been analyzed. The power decline curve has been obtained by means of the detailed analysis of antenna system in partial axis situation. The system includes transmitter channel, receiving channel and experiment channel. It can realize the functions of transmitter-receiver isolation and multi-light ways using dichroic mirrors and beam splitting prisms. The system volume and weight are reduced greatly. The complexity of conventional laser communication system is reduced enormously at the same time. It has important reference significance and application value. © 2013 Copyright SPIE.

Number of references:7

Main heading:Optical systems

Controlled terms:Integrated optics - Mirrors - Optical communication - Optical instruments - Optical links - Telecommunication systems - Transmitters

Uncontrolled terms:Cassegrain optical antennas - Conventional lasers - Eccentric-pupil system - Optical antennae - Space laser communication - Space optical communication - Transmission efficiency - Transmitter channels

Classification code:716 Telecommunication; Radar, Radio and Television - 717.1 Optical Communication Systems - 741.3 Optical Devices and Systems

DOI:10.1117/12.2030551

Database:Compendex

Accession number:20142017710731

Title:Design and simulation of large-mode-area solid-core bragg fiber

Authors:Li, Lu (1); Zhang, Aidong (1); Zhan, Huan (1); He, Jianli (1); Zhou, Zhiguang (1); Lin, Aoxiang (1)

Corresponding author:Lin, A.(aoxiang@opt.ac.cn)

Source title:Asia Communications and Photonics Conference, ACP

Abbreviated source title:Asia Commun. Photonics Conf.

Monograph title:Asia Communications and Photonics Conference, ACP 2013

Issue date:2013

Publication year:2013

Language:English

ISSN:2162108X

ISBN-13:9781557529893

Document type:Conference article (CA)

Conference name:Asia Communications and Photonics Conference, ACP 2013

Conference date:November 12, 2013 - November 15, 2013

Conference location:Beijing, China

Conference code:104975

Publisher:Optical Society of America

Abstract:Solid-core Bragg fiber was proposed as a competitive solution for high power laser delivery. The optimized fiber is with effective area of 400 μm2 and low loss of 3 dB/km at 1.08 μm. © OSA 2013.

Number of references:5

Main heading:Photonics

Controlled terms:Bragg cells - High power lasers - Photonic bandgap fibers

Uncontrolled terms:Bragg fibers - Design and simulation - Effective area - Large mode area

Classification code:712 Electronic and Thermionic Materials - 717 Optical Communication - 741.3 Optical Devices and Systems - 744 Lasers - 744.1 Lasers, General - 951 Materials Science

Database:Compendex

Accession number:20142017711177

Title:High nonlinear fluorotellurite glass fiber

Authors:Zhan, Huan (1); Zhang, Aidong (1); He, Jianli (1); Shi, Tengfei (1); Si, Jinhai (3); Lin, Aoxiang (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi'an 710119, China; (2) Graduate School of Chinese Academy of Sciences (CAS), Beijing 100049, China; (3) Key Laboratory for Physical Electronics and Devices, School of Electronics and Information Engineering, Xi'an Jiaotong University, No.28, Xianning West Road, Xi'an, 710049, China

Corresponding author:Lin, A.(aoxiang.research@gmail.com)

Source title:Asia Communications and Photonics Conference, ACP

Abbreviated source title:Asia Commun. Photonics Conf.

Monograph title:Asia Communications and Photonics Conference, ACP 2013

Issue date:2013

Publication year:2013

Language:English

ISSN:2162108X

ISBN-13:9781557529893

Document type:Conference article (CA)

Conference name:Asia Communications and Photonics Conference, ACP 2013

Conference date:November 12, 2013 - November 15, 2013

Conference location:Beijing, China

Conference code:104975

Publisher:Optical Society of America

Abstract:We report on the fabrication of water-free fluorotellurite glass fiber with high nonlinearity. By the continuous-wave self-phase modulation method, the nonlinear refractive index n<inf>2</inf> is estimated to be 1.4×10 -18 m2/W at 1550 nm. © OSA 2013.

Number of references:7

Main heading:Photonics

Controlled terms:Glass fibers - Refractive index

Uncontrolled terms:1550 nm - Continuous waves - Fluoro-tellurite glass - High nonlinear - High nonlinearity - Nonlinear refractive index

Classification code:413 Insulating Materials - 741.1 Light/Optics

Database:Compendex

Accession number:20141317521647

Title:A study on the application of ICCD in low light level remote sensing

Authors:Bai, Zhe (1); Zhang, Jian (1); Fan, Xue-Wu (1); Yang, Wen-Gang (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an 710119, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8912

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Low-Light-Level Technology and Applications

Issue date:2013

Publication year:2013

Article number:89121G

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497819

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE); The Optical Society; European Optical Society; European Optical Society

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:Image intensifiers are always used to amplify low light level (LLL) images in a wide wavelength range to observable levels. As a leader in image intensifiers for industrial and scientific applications, intensified CCD (ICCD) is an innovative product which is a hybrid of image intensifier and CCD. Over the past few decades ICCDs have been increasingly developed and widely used in a variety of fields such as LLL television system and medical diagnostics. In this paper, we present the application of ICCD in the field of LLL remote sensing. General LLL imaging devices are introduced briefly, and their advantages and disadvantages are compared. ICCD technology which includes fundamental, configuration and development, is expatiated on. The major parameters which incarnate the performance of the LLL remote sensing ICCD camera are analyzed in detail, such as signal noise ratio (SNR), dynamic range, spatial resolution, etc. An ICCD camera is designed, and an imaging experiment is made to validate the imaging ability of it in LLL condition. The experiment results are discussed and summarized. At last, the most important issues to the application of ICCD in LLL remote sensing are generalized in detail. © 2013 SPIE.

Number of references:9

Main heading:Remote sensing

Controlled terms:Cameras - Image intensifiers (solid state) - Optical resolving power - Television systems

Uncontrolled terms:ICCD - Imaging experiments - Innovative product - Low light level - Medical diagnostics - Scientific applications - Signal-noise ratio - SNR

Classification code:714.2 Semiconductor Devices and Integrated Circuits - 716.4 Television Systems and Equipment - 731.1 Control Systems - 741.1 Light/Optics - 742.2 Photographic Equipment

DOI:10.1117/12.2034745

Database:Compendex

Accession number:20135117094999

Title:Spectral segmentation via midlevel cues integrating geodesic and intensity

Authors:Lu, Huchuan (1); Zhang, Ruixuan (1); Li, Shifeng (1); Li, Xuelong (2)

Author affiliation:(1) School of Information and Communication Engineering, Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian 116024, China; (2) Center for Optical Imagery Analysis and Learning, State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Xi'an 710119, China

Source title:IEEE Transactions on Cybernetics

Abbreviated source title:IEEE Trans. Cybern.

Volume:43

Issue:6

Issue date:December 2013

Publication year:2013

Pages:2170-2178

Article number:6480807

Language:English

ISSN:21682267

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., 445 Hoes Lane / P.O. Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:Image segmentation still remains as a challenge in image processing and pattern recognition when involving complex natural scenes. In this paper, we present a new affinity model for spectral segmentation based on midlevel cues. In contrast to most existing methods that operate directly on low-level cues, we first oversegment the image into superpixel images and then integrate the geodesic line edge and intensity cue to form the similarity matrix $W$ so that it more accurately describes the similarity between data. The geodesic line edge could avoid strong boundary and represent the true boundary between two superpixels while the mean red green blue vector could describe the intensity of superpixels better. As far as we know, this is a totally new kind of affinity model to represent superpixels. Based on this model, we use the spectral clustering in the superpixel level and then achieve the image segmentation in the pixel level. The experimental results show that the proposed method performs steadily and well on various natural images. The evaluation comparisons also prove that our method achieves comparable accuracy and significantly performs better than most state-of-the-art algorithms. © 2013 IEEE.

Number of references:42

Main heading:Image segmentation

Controlled terms:Geodesy - Pattern recognition

Uncontrolled terms:Geodesic - Red green blues - Similarity matrix - Spectral clustering - Spectral segmentation - State-of-the-art algorithms - Super pixels - Unsupervised segmentation

Classification code:405.3 Surveying - 716 Telecommunication; Radar, Radio and Television - 741.1 Light/Optics

DOI:10.1109/TCYB.2013.2243432

Database:Compendex

Accession number:20135117116072

Title:Double-cutting beam shaping technique for high-power diode laser area light source

Authors:Huang, Zhihua (1); Xiong, Lingling (1); Liu, Hui (1); Wang, Zhenfu (1); Zhang, Pu (1); Nie, Zhiqiang (1); Wu, Dihai (1); Liu, Xingsheng (1)

Author affiliation:(1) Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics, State Key Laboratory of Transient Optics and Photonics, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100049, China; (3) Focuslight Technologies, Xi'an 710119, China

Source title:Optical Engineering

Abbreviated source title:Opt Eng

Volume:52

Issue:10

Issue date:October 2013

Publication year:2013

Article number:106108

Language:English

ISSN:00913286

E-ISSN:15602303

CODEN:OPEGAR

Document type:Journal article (JA)

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:A new beam-shaping technique is proposed to improve the beam quality of a high-power diode laser area light source. It consists of two staggered prism arrays and a reflector array, which can cut the slow axis beam twice and rearrange the divided beams in fast axis to make the beam quality of both axes approximately equal. Furthermore, the beam transformation and compression can be carried out simultaneously, and the assembly error of this technique induced by the machining accuracy of prism's dimensions also can be greatly decreased. By this technique, a fiber-coupled system for one three-bar laser diode stack is designed and characterized. The experimental results demonstrate that the laser beams could be transformed into the required distribution with &sim;93.4% reshaped efficiency and coupled into a 400 μm/0.22 NA fiber, which are consistent with the theory. © 2013 Society of Photo-Optical Instrumentation Engineers (SPIE).

Number of references:20

Main heading:Semiconductor lasers

Controlled terms:Light sources - Machining - Prisms

Uncontrolled terms:Beam parameter product - Beam shaping technique - Beam transformation - Beam-shaping - Fiber couplings - Fiber-coupled systems - High-power diode lasers - Machining Accuracy

Classification code:604.2 Machining Operations - 714.2 Semiconductor Devices and Integrated Circuits - 741.3 Optical Devices and Systems

DOI:10.1117/1.OE.52.10.106108

Database:Compendex

Accession number:20135217144567

Title:Design of fore telescope system for Offner imaging spectrometer

Authors:Yan, Xingtao (1); Yang, Jianfeng (1); Xue, Bin (1); Ma, Xiaolong (1); Zhao, Yiyi (1); Bu, Fan (1)

Author affiliation:(1) The Spectral Imaging Technique Laboratory, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Yan, X.(xingtao.yan@163.com)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:42

Issue:10

Issue date:2013

Publication year:2013

Pages:2712-2717

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:In allusion to the specific structural characters of Offner imaging spectrometer, the fundamental design principles of its fore telescope were analyzed. A novel method to design the wide FOV, long focal length and telecentric off-axis three-mirror anastigmatic (TMA) optical system was presented. For the projective demand, a fore telescope system for Offner imaging spectrometer was designed. Its focal length was 800 mm. Its FOV was 8.6°×0.148°, and the operation spectrum band was from 0.9 μm to 5 μm. The evaluation results of its imaging quality demonstrate that the MTF of each spectrum band is higher than 0.65 at the Nyquist frequency 16.7 lp/mm. The imaging quality has reached the diffraction-limitation, which satisfies the pre-designed requirement. Therefore, the design method is feasible. The designed telescope system is compact, easy to be fabricated and suitable for space borne Offner imaging spectrometer.

Number of references:11

Main heading:Optical systems

Controlled terms:Mirrors - Optical design - Spectrometers - Telescopes

Uncontrolled terms:Evaluation results - Fundamental design - Imaging spectrometers - Long focal lengths - Nyquist frequency - Off-axis - Structural character - Telecentric

Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems

Database:Compendex

Accession number:20140817351982

Title:The application of carbon nanotubes in mode locked fiber laser

Authors:Yu, Zhenhua (1); Wang, Yonggang (2); Song, Yanrong (1)

Author affiliation:(1) Institute of Information Photonics Technology, College of Applied Sciences, Beijing University of Technology, Beijing, 100124, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8923

Monograph title:Micro/Nano Materials, Devices, and Systems

Issue date:2013

Publication year:2013

Article number:89231F

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819498144

Document type:Conference article (CA)

Conference name:Micro/Nano Materials, Devices, and Systems

Conference date:December 9, 2013 - December 11, 2013

Conference location:Melbourne, VIC, Australia

Conference code:102462

Sponsor:Australian National Fabrication Facility; Grey Innovation; Melbourne Centre for Nanofabrication; MicroNano Research Facility; RMIT University

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:We demonstrate a mode locked fiber laser based on single wall carbon nanotubes. The mode locking is achieved by the evanescent field interaction of the propagating light with a single wall carbon nanotubes saturable absorber in a microfiber. The pulse width is 114fs. The maximum average output power is 21mW. The center of the wavelength is 1556nm with 26nm spectral width. The repetition rate is 111.6MHz. © 2013 Copyright SPIE.

Number of references:20

Main heading:Locks (fasteners)

Controlled terms:Carbon nanotubes - Fiber lasers - Saturable absorbers - Ultrafast lasers

Uncontrolled terms:Average output power - Field interactions - Micro-fiber - Mode-locked laser - Pulsewidths - Repetition rate - Spectral widths

Classification code:601.3 Mechanisms - 744.1 Lasers, General - 744.4 Solid State Lasers - 761 Nanotechnology

DOI:10.1117/12.2036094

Database:Compendex

Accession number:20134216857646

Title:A novel weighted-direction color interpolation

Authors:Tao, Jin-You (1); Yang, Jian-Feng (1); Xue, Bin (1); Liang, Xiao-Fen (1); Qi, Yong-Hong (1); Wang, Feng (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100039, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8908

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Sensors and Applications

Issue date:2013

Publication year:2013

Article number:89080K

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497772

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:A digital camera capture images by covering the sensor surface with a color filter array (CFA), only get a color sample at pixel location. Demosaicking is a process by estimating the missing color components of each pixel to get a full resolution image. In this paper, a new algorithm based on edge adaptive and different weighting factors is proposed. Our method can effectively suppress undesirable artifacts. Experimental results based on Kodak images show that the proposed algorithm obtain higher quality images compared to other methods in numerical and visual aspects. © 2013 SPIE.

Number of references:9

Main heading:Color

Controlled terms:Algorithms - Color image processing - Interpolation - Numerical methods - Sensors

Uncontrolled terms:Bayer - Color filter arrays - Color interpolation - Demosaicing - Directional weighting - Full resolution images - PSNR - Weighting factors

Classification code:723 Computer Software, Data Handling and Applications - 741.1 Light/Optics - 801 Chemistry - 921 Mathematics - 921.6 Numerical Methods

DOI:10.1117/12.2032500

Database:Compendex

Accession number:20134016796142

Title:Kinetics of polarization gratings assisted with polarized violet light in bacteriorhodopsin films

Authors:Yu, Xianghua (1); Gao, Peng (1); Yao, Baoli (1); Lei, Ming (1); Rupp, Romano (2)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) Faculty of Physics, University of Vienna, Boltzmanngasse 5, A-1090 Vienna, Austria

Corresponding author:Yao, B.(yaobl@opt.ac.cn)

Source title:Journal of the Optical Society of America A: Optics and Image Science, and Vision

Abbreviated source title:J Opt Soc Am A

Volume:30

Issue:9

Issue date:September 1, 2013

Publication year:2013

Pages:1885-1891

Language:English

ISSN:10847529

E-ISSN:15208532

CODEN:JOAOD6

Document type:Journal article (JA)

Publisher:Optical Society of America, 2010 Massachusetts Ave, NW, Washington, DC, DC 20036-1023, United States

Abstract:Polarization gratings can be recorded in bacteriorhodopsin films by an orthogonal pair of linearly or circularly polarized beams. If a linearly polarized auxiliary violet light is added during the grating formation, the grating becomes polarization-sensitive. A theoretical model based on the two-state photochromic theory is proposed to calculate the diffraction efficiency kinetics of these polarization gratings. In both cases, the additional linearly polarized auxiliary violet irradiation improves the steady-state diffraction efficiency and leads to a cosine modulation of the steady-state diffraction efficiency by the polarization orientation of the readout beam. Experiment results demonstrate the correctness of the theoretical model. © 2013 Optical Society of America.

Number of references:24

Main heading:Polarization

Controlled terms:Diffraction efficiency

Uncontrolled terms:Bacteriorhodopsin films - Circularly polarized beam - Cosine modulation - Kinetics of polarization - Linearly polarized - Polarization gratings - Polarization orientation - Theoretical modeling

Classification code:711 Electromagnetic Waves - 711.1 Electromagnetic Waves in Different Media - 741 Light, Optics and Optical Devices - 741.1 Light/Optics - 743 Holography

DOI:10.1364/JOSAA.30.001885

Database:Compendex

Accession number:20131516191852

Title:White-light Spectro-Polarimetric imaging for material classification

Authors:Bu, Fan (1); Qiu, Yuehong (1); Jiang, Baotan (1); Liu, Hui (1)

Author affiliation:(1) Space Optics Laboratory, Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an 710119, China; (2) Graduate School of CAS, Beijing 100049, China

Corresponding author:Bu, F.(bufan19860731@163.com)

Source title:Journal of Computational Information Systems

Abbreviated source title:J. Comput. Inf. Syst.

Volume:9

Issue:4

Issue date:February 15, 2013

Publication year:2013

Pages:1255-1262

Language:English

ISSN:15539105

Document type:Journal article (JA)

Publisher:Binary Information Press, P.O. Box 162, Bethel, CT 06801-0162, United States

Abstract:A novel technique for material classification ultilizing Spectro-Polarimetric information is presented. Based on experimental white-light Spectro-Polarimetric CCD camera, we obtain a variety of Spectro-Polarimetric images of natural objects and artificial targets. Compared with traditional images, Spectro-Polarimetric images have much complementary and redundancy information that can be used to easily distinguish different materials. Furthermore, DOLP calculated from Stokes-Muller parameters images can show their advantages in quantization. Therefore, we can draw conclusions that Spectro-Polarimetric detecting is superior to conventional photometric detecting, and it can play an important role in military target identification. Copyright © 2013 Binary Information Press.

Number of references:7

Main heading:Polarimeters

Controlled terms:Computer applications - Information systems

Uncontrolled terms:DOLP - Material classification - Spectro-Polarimetric - Stokes-mueller - White-ligh

Classification code:723.5 Computer Applications - 903.2 Information Dissemination - 941.3 Optical Instruments

Database:Compendex

Accession number:20133216587675

Title:Investigation of various fabrics in terahertz time-domain spectroscopy

Authors:Liu, Jia (1); Fan, Wenhui (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Liu, J.(jjtong@aiofm.ac.cn)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:42

Issue:6

Issue date:June 2013

Publication year:2013

Pages:1537-1541

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:The spectral properties of various fabrics were investigated by using terahertz time-domain spectroscopy. Through measuring the time-domain spectra in experiments and calculating frequency- domain spectra by applying the fast Fourier-transform (FFT) to each pulse waveform, the spectral information of fabrics in terahertz region, especially the transmission and absorbance, was obtained and analyzed. It is well demonstrated that the fabrics, which are opaque in visible light, are almost transparent in terahertz region and no special absorption spectra. This research has a great influence on identifying the concealed danger and terahertz imaging.

Number of references:27

Main heading:Plasmons

Controlled terms:Frequency domain analysis - Spectrophotometers - Terahertz spectroscopy - Transmissions

Uncontrolled terms:Absorbances - Frequency domains - Spectral information - Spectral properties - Terahertz imaging - Terahertz time domain spectroscopy - THz-TDS - Time domain

Classification code:602.2 Mechanical Transmissions - 731.1 Control Systems - 801 Chemistry - 931.1 Mechanics - 931.3 Atomic and Molecular Physics

Database:Compendex

Accession number:20131516200059

Title:Femtosecond-laser-written waveguide in magneto-optical glass

Authors:Hou, Fang (1); Li, Weinan (2); Bai, Jing (2); Zhou, Kaiming (2); Long, Xuewen (2); Hui, Rongqing (2); Zhang, Xiaolin (1); Cheng, Guanghua (2)

Author affiliation:(1) School of Science, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi 710119, China

Corresponding author:Cheng, G.(gcheng@opt.ac.cn)

Source title:Guangxue Xuebao/Acta Optica Sinica

Abbreviated source title:Guangxue Xuebao

Volume:33

Issue:3

Issue date:March 2013

Publication year:2013

Article number:0314002

Language:Chinese

ISSN:02532239

CODEN:GUXUDC

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:Femtosecond-laser-induced refractive index modification has provided a flexible tool to fabricate three-dimensional photonic devices. Magneto-optical (MO) glass is widely used in integrated optics because of its Faraday rotation. Femtosecond laser at 1 kHz repetion rate is used to write waveguides in MO glass, then near-field modes of waveguides written by different focusing parameters are measured, and the refractive index changes in the written regions and mode field diameters as functions of writing parameters (scanning speed and writing power) are obtained, which show a writing window of waveguide formation in MO glass. Experimental results show that the Verdet constant in the written region only has a slight reduction (about 2.8%) under a special writing parameter set (10×, objective scanning speed 40 μm/s, laser power 3 mW); the loss of the waveguide is 1.53 dB/cm, and its mode field diameter is 10 μm injected by 980 nm, so it is practicable to couple light from fiber into waveguide written by femtosecond laser.

Number of references:20

Main heading:Glass

Controlled terms:Optical glass - Optical waveguides - Refractive index - Ultrashort pulses - Waveguides

Uncontrolled terms:Laser technique - Magneto-optical - Mode field diameter - Refractive index changes - Refractive-index modification - Scanning speed - Verdet constant - Waveguide formation

Classification code:714.3 Waveguides - 741.1 Light/Optics - 744.1 Lasers, General - 812.3 Glass

DOI:10.3788/AOS201333.0314002

Database:Compendex

Accession number:20140417230240

Title:123 μm emission of Er-doped water-free fluorotellurite glasses

Authors:Zhan, Huan (1); He, Jianli (1); Zhou, Zhiguang (1); Zhang, Aidong (1); Si, Jinhai (2); Lin, Aoxiang (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi'an 710119, China; (2) Key Laboratory for Physical Electronics and Devices of the Ministry of Education, School of Electronic and Information Engineering, Xi'an Jiaotong University, Xianning-xilu 28, Xi'an, 710049, China; (3) Shaanxi Key Lab of Information Photonic Technique, School of Electronic and Information Engineering, Xi'an Jiaotong University, Xianning-xilu 28, Xi'an, 710049, China

Corresponding author:Lin, A.(aoxiang@opt.ac.cn)

Source title:Physics and Chemistry of Glasses: European Journal of Glass Science and Technology Part B

Abbreviated source title:Phys. Chem. Glasses Euro. J. Glass Sci. Technol. Part B

Volume:54

Issue:6

Issue date:December 2013

Publication year:2013

Pages:260-263

Language:English

ISSN:00319090

Document type:Journal article (JA)

Publisher:Society of Glass Technology, Saville Street East, Sheffield, S4 7UQ, United Kingdom

Abstract:To identify more efficient materials for 1·2 μm fibre optical amplifiers, we report on near-infrared emission centred at 1·23 μm from Er3+-doped water-free fluorotellurite glasses with the composition 60TeO<inf>2</inf>-30ZnF<inf>2</inf>-10NaF (TZNF60, mol%). Pumped by an OPO laser system at 523 nm, emission at 1·23 μm (Er 3+:4S<inf>3/2</inf>Æ4I11/2 transition) was observed; the τ<inf>f</inf> at 1·23 μm is 21·6-86·4 μs, arising from the optimized water-free surroundings and lower phonon energy arising from the addition of a large amount of fluoride into the tellurite-based host glass. 0·5 wt% Er <inf>2</inf>O3 doped TZNF60 glass is regarded as a promising material for the development of optical amplification and laser operation at the relatively unexplored 1·2 μm region as it has the highest quantum efficiency and the largest figure of merit among this group of Er-TZNF60 glasses.

Number of references:22

Main heading:Glass

Controlled terms:Erbium - Glass transition - Light amplifiers - Pumping (laser) - Tellurium compounds

Uncontrolled terms:Figure of merits - Fluoro-tellurite glass - Large amounts - Laser operations - Laser systems - Near-infrared emissions - Optical amplifications - Phonon energies

Classification code:547.2 Rare Earth Metals - 744.1 Lasers, General - 804.1 Organic Compounds - 812.3 Glass - 815.1 Polymeric Materials

Database:Compendex

Accession number:20132216369208

Title:A passively Q-switched Yb:YAG laser with a single-walled carbon nanotube saturable absorber

Authors:Chu, Hongwei (1); Zhao, Shengzhi (1); Yang, Kejian (1); Li, Yuefei (1); Li, Dechun (1); Li, Guiqiu (1); Zhao, Jia (1); Xu, Xiaodong (2); Di, Juqing (2); Zheng, Lihe (2); Xu, Jun (2); Wang, Yonggang (3)

Author affiliation:(1) School of Information Science and Engineering, Shandong University, Jinan 250100, China; (2) Key Laboratory of Transparent and Opto-Functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 215 Chengbei Road, Shanghai 201800, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Source title:Laser Physics

Abbreviated source title:Laser Phys.

Volume:23

Issue:6

Issue date:June 2013

Publication year:2013

Article number:065002

Language:English

ISSN:1054660X

E-ISSN:15556611

Document type:Journal article (JA)

Publisher:Institute of Physics Publishing, Temple Circus, Temple Way, Bristol, BS1 6BE, United Kingdom

Abstract:A diode-end-pumped passively Q-switched Yb:YAG bulk laser with a single-walled carbon nanotube saturable absorber is presented. A maximum output power of 715 mW has been obtained with a slope efficiency of 15.7%. The minimum pulse width of 88 ns was achieved at a repetition rate of 175 kHz, corresponding to a pulse energy of 4:1 μJ and a peak power of 46.2 W. © 2013 Astro Ltd.

Number of references:24

Main heading:Q switching

Controlled terms:Pumping (laser) - Saturable absorbers - Single-walled carbon nanotubes (SWCN) - Ytterbium

Uncontrolled terms:Diode end-pumped - Maximum output power - Minimum pulse widths - Passively Q-switched - Pulse energies - Repetition rate - Single-walled carbon nanotube saturable absorbers - Slope efficiencies

Classification code:547.2 Rare Earth Metals - 744.1 Lasers, General - 744.8 Laser Beam Interactions - 761 Nanotechnology

DOI:10.1088/1054-660X/23/6/065002

Database:Compendex

Accession number:20134116839368

Title:Manifold regularized sparse NMF for hyperspectral unmixing

Authors:Lu, Xiaoqiang (1); Wu, Hao (2); Yuan, Yuan (1); Yan, Pingkun (1); Li, Xuelong (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) Faculty of Mathematics and Computer Science, Hubei University, Wuhan 430062, China

Source title:IEEE Transactions on Geoscience and Remote Sensing

Abbreviated source title:IEEE Trans Geosci Remote Sens

Volume:51

Issue:5

Issue date:2013

Publication year:2013

Pages:2815-2826

Language:English

ISSN:01962892

CODEN:IGRSD2

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., 445 Hoes Lane / P.O. Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:Hyperspectral unmixing is one of the most important techniques in analyzing hyperspectral images, which decomposes a mixed pixel into a collection of constituent materials weighted by their proportions. Recently, many sparse nonnegative matrix factorization (NMF) algorithms have achieved advanced performance for hyperspectral unmixing because they overcome the difficulty of absence of pure pixels and sufficiently utilize the sparse characteristic of the data. However, most existing sparse NMF algorithms for hyperspectral unmixing only consider the Euclidean structure of the hyperspectral data space. In fact, hyperspectral data are more likely to lie on a low-dimensional submanifold embedded in the high-dimensional ambient space. Thus, it is necessary to consider the intrinsic manifold structure for hyperspectral unmixing. In order to exploit the latent manifold structure of the data during the decomposition, manifold regularization is incorporated into sparsity-constrained NMF for unmixing in this paper. Since the additional manifold regularization term can keep the close link between the original image and the material abundance maps, the proposed approach leads to a more desired unmixing performance. The experimental results on synthetic and real hyperspectral data both illustrate the superiority of the proposed method compared with other state-of-the-art approaches. © 2012 IEEE.

Number of references:38

Main heading:Algorithms

Controlled terms:Spectroscopy

Uncontrolled terms:Constituent materials - Hyper-spectral images - Hyperspectral unmixing - Manifold regularizations - Mixed pixel - Nonnegative matrix factorization - Sparse non-negative matrix factorizations - State-of-the-art approach

Classification code:723 Computer Software, Data Handling and Applications - 801 Chemistry - 921 Mathematics

DOI:10.1109/TGRS.2012.2213825

Database:Compendex

Accession number:20140217184370

Title:Design of chirped mirrors used for the dispersion compensation in femtosecond lasers

Authors:Liao, Chunyan (1); Qin, Junjun (1); Hu, Manli (2)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, NO.17, Xinxi Road, Xi'an, China; (2) Natl. Photoelectric Technol. and Funct. Mat. and Applic. of Sci. and Technol. Intl. Cooperation Base, Department of Physics, Northwest University, No. 229, Taibai North Road, Xi'an, China

Corresponding author:Liao, C.(cyliao@nwu.edu.cn)

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:9068

Monograph title:Eighth International Conference on Thin Film Physics and Applications

Issue date:2013

Publication year:2013

Article number:90680K

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819499974

Document type:Conference article (CA)

Conference name:8th International Conference on Thin Film Physics and Applications, TFPA 2013

Conference date:September 20, 2013 - September 23, 2013

Conference location:Shanghai, China

Conference code:101763

Sponsor:National Natural Science Foundation of China; Science and Technology Commission of Shanghai Municipality; Chinese Physics Society; Shanghai Physics Society

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:Negative dispersion dielectric multilayer mirrors have contributed significantly to the enhancement of the performance, compactness and reliability of femtosecond lasers. There are two alternative approaches that are widely investigated for dispersion compensation: chirped mirrors and Gires-Tournois mirrors. Chirped mirrors can exhibit a broad smooth highreflectance range if the layer thickness is superimposed a quasi-periodic modulation on a linear variation of the optical thickness of the layers. The performance of such chirped mirrors is calculated and the factors affecting the performance are discussed in detail. In such chirped mirrors, the performance is strongly affected by the expected bandwidth and modulation period of the optical thickness of the layers. © 2013 SPIE.

Number of references:11

Main heading:Laser mirrors

Controlled terms:Dispersion compensation - Film preparation - Mirrors - Modulation - Optical films - Optical properties - Thin films - Ultrashort pulses

Uncontrolled terms:Chirped mirrors - Dielectric multilayers - Gires-Tournois mirrors - Layer thickness - Linear variation - Modulation period - Optical thickness - Quasiperiodic modulations

Classification code:744.1 Lasers, General - 741 Light, Optics and Optical Devices - 718 Telephone Systems and Related Technologies; Line Communications - 717 Optical Communication - 716 Telecommunication; Radar, Radio and Television - 714.2 Semiconductor Devices and Integrated Circuits - 712.1 Semiconducting Materials

DOI:10.1117/12.2053961

Database:Compendex

Accession number:20131716226958

Title:Controlled focus shaping with generalized cylindrical vector beam

Authors:Chen, Lingling (1); Wang, Jiming (1); He, Chongjun (1); Liu, Youwen (1); Yun, Maojin (4); Kong, Weijin (4)

Author affiliation:(1) College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China; (2) College of Science, China Jiliang University, Hangzhou, 310018, China; (3) State Key Laboratory of Transient Optics and Photonics, Xian, 710119, China; (4) College of Physics Science, Qingdao University, Qingdao, 266071, China

Corresponding author:Wang, J.(jimingw@nuaa.edu.cn)

Source title:Journal of Modern Optics

Abbreviated source title:J. Mod. Opt.

Volume:60

Issue:5

Issue date:March 1, 2013

Publication year:2013

Pages:391-398

Language:English

ISSN:09500340

E-ISSN:13623044

CODEN:JMOPEW

Document type:Journal article (JA)

Publisher:Taylor and Francis Ltd., 4 Park Square, Milton Park, Abingdon, Oxfordshire, OX14 4RN, United Kingdom

Abstract:An optical system is proposed for the controlled focus shaping of generalized cylindrical vector beams by a high-numerical-aperture lens. A segmented electro-optical filter with four concentric belts is introduced and works with a double-λ/2-plate. By controlling the rotational angle of the plate and the voltage applied to the filter with proper azimuth angle, a three-dimensional engineered focusing field, such as an electrically controlled axial-shifted focus, extended depth of focus, and a diffraction-limited optical tube, can be achieved. The main advantage of this focusing system is that the focused field can be adjusted and formed by the applied voltage and the rotational angle of the half-wave plates. It can provide a new focus shaping technique with free adjustability and flexibility. © 2013 Taylor and Francis Group, LLC.

Number of references:31

Main heading:Optical systems

Controlled terms:Birefringence - Molecular physics - Optics - Polarization

Uncontrolled terms:Applied voltages - Cylindrical vector beam - Diffraction limited - Electro-optical - Extended depth of focus - Focusing system - Laser beam shaping - Rotational angle

Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems - 931.3 Atomic and Molecular Physics

DOI:10.1080/09500340.2013.779392

Database:Compendex

Accession number:20133216579235

Title:Ranking graph embedding for learning to rerank

Authors:Pang, Yanwei (1); Ji, Zhong (1); Jing, Peiguang (1); Li, Xuelong (2)

Author affiliation:(1) School of Electronic Information Engineering, Tianjin University, Tianjin 300072, China; (2) Center for OPTical IMagery Analysis and Learning, State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an 710119, China

Source title:IEEE Transactions on Neural Networks and Learning Systems

Abbreviated source title:IEEE Trans. Neural Networks Learn. Sys.

Volume:24

Issue:8

Issue date:2013

Publication year:2013

Pages:1292-1303

Article number:6508899

Language:English

ISSN:2162237X

E-ISSN:21622388

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., 445 Hoes Lane / P.O. Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:Dimensionality reduction is a key step to improving the generalization ability of reranking in image search. However, existing dimensionality reduction methods are typically designed for classification, clustering, and visualization, rather than for the task of learning to rank. Without using of ranking information such as relevance degree labels, direct utilization of conventional dimensionality reduction methods in ranking tasks generally cannot achieve the best performance. In this paper, we show that introducing ranking information into dimensionality reduction significantly increases the performance of image search reranking. The proposed method transforms graph embedding, a general framework of dimensionality reduction, into ranking graph embedding (RANGE) by modeling the global structure and the local relationships in and between different relevance degree sets, respectively. The proposed method also defines three types of edge weight assignment between two nodes: binary, reconstruction, and global. In addition, a novel principal components analysis based similarity calculation method is presented in the stage of global graph construction. Extensive experimental results on the MSRA-MM database demonstrate the effectiveness and superiority of the proposed RANGE method and the image search reranking framework. © 2012 IEEE.

Number of references:52

Main heading:Principal component analysis

Controlled terms:Artificial intelligence - Computer networks

Uncontrolled terms:Dimensionality reduction - Dimensionality reduction method - Generalization ability - Graph embeddings - Image search reranking - Learning to rank - Principal components analysis - Similarity calculation

Classification code:922.2 Mathematical Statistics - 723.4 Artificial Intelligence - 723 Computer Software, Data Handling and Applications - 722 Computer Systems and Equipment - 718 Telephone Systems and Related Technologies; Line Communications - 717 Optical Communication - 716 Telecommunication; Radar, Radio and Television

DOI:10.1109/TNNLS.2013.2253798

Database:Compendex

Accession number:20130215898323

Title:Theoretical and experimental study on nonintrusive light injection via cladding in plastic optical fibers

Authors:Lin, Xiao (1); Ren, Liyong (1); Qu, Enshi (1); Liang, Jian (1); Ju, Haijuan (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Lin, X.(linxiao@opt.cn)

Source title:Journal of Lightwave Technology

Abbreviated source title:J Lightwave Technol

Volume:31

Issue:3

Issue date:2013

Publication year:2013

Pages:359-365

Article number:6363504

Language:English

ISSN:07338724

CODEN:JLTEDG

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., 445 Hoes Lane / P.O. Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:Based on the fiber macrobending and the refractive index matching technologies, a novel scheme of nonintrusive light injection, namely, the light signal is injected into the fiber core from the fiber cladding without any destruction, is proposed in plastic optical fibers (POFs). Using the ray-tracing method, a 3-D theoretical model is established to characterize the performance of the light injection. The influences of the fiber bending radius, the light source placement, and the surrounding medium refractive index on the light injection efficiency are investigated and assessed. Meanwhile, correlative experiments have also been conducted to contrast theoretical simulations. The experiment results fit theoretical ones well. This nonintrusive light injection technology in POFs might have many potential applications such as the optical signal uploading and downloading, the optical coupling, and the local area networks. © 2012 IEEE.

Number of references:27

Main heading:Plastic optical fibers

Controlled terms:Experiments - Fiber optic sensors - Fibers - Light sources - Ray tracing - Refractive index

Uncontrolled terms:Experimental studies - Fiber bending - Fiber claddings - Fiber cores - Light injection - Light signal - Macro bending - Non-intrusive - Optical couplings - Optical fiber devices - Optical signals - Potential applications - Ray-tracing method - Refractive index matching - Surrounding-medium refractive indices - Theoretical models - Theoretical simulation

Classification code:741.1 Light/Optics - 741.1.2 Fiber Optics - 812 Ceramics, Refractories and Glass - 817 Plastics and Other Polymers: Products and Applications - 901.3 Engineering Research

DOI:10.1109/JLT.2012.2230434

Database:Compendex

Accession number:20134116842453

Title:Target velocity acquisition from signals received by Fourier telescopy

Authors:Li, Yang (1); Xiang, Libin (3); Zhang, Wenxi (2)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) Graduate University of Chinese Academy of Sciences, Beijing 100049, China; (3) Academy of Opto-Electronics, Chinese Academy of Sciences, Beijing 100094, China

Corresponding author:Li, Y.(liyang914@126.com)

Source title:Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams

Abbreviated source title:Qiangjiguang Yu Lizishu

Volume:25

Issue:9

Issue date:September 2013

Publication year:2013

Pages:2193-2197

Language:Chinese

ISSN:10014322

CODEN:QYLIEL

Document type:Journal article (JA)

Publisher:Editorial Office of High Power Laser and Particle Beams, P.O. Box 919-805, Mianyang, 621900, China

Abstract:The signals received by Fourier telescopy are analyzed and demonstrated to contain not only image information but also two-dimensional velocity information of the measured target. The velocities on each component can be calculated by the periodic signal frequencies that can be extracted from received signals. Then the two-dimension velocity is composited. The frequency of the signal is extracted by fast Fourier transform analysis for coarse frequency estimate, and by ratio frequency correction algorithms using Hanning window for precise frequency correction. Simulation is made to measure the flight velocity of the missile by Fourier telescopy. The result shows that the target velocity acquired by this method has almost no error without noise, while it has relatively high precision with noise when SNR is higher than 5 dB. The velocity acquisition method from receiving signal of Fourier telescopy is demonstrated to have high precision, a good anti-noise property and to be theoretically feasible.

Number of references:9

Main heading:Signal processing

Controlled terms:Fast Fourier transforms - Signal to noise ratio - Velocity - Velocity measurement

Uncontrolled terms:Fourier telescopy - Frequency correction - Frequency estimates - Image information - Ratio frequencies - Received signals - Spectrum correction - Velocity information

Classification code:716.1 Information Theory and Signal Processing - 921.3 Mathematical Transformations - 931.1 Mechanics - 943.3 Special Purpose Instruments

DOI:10.3788/HPLPB20132509.2193

Database:Compendex

Accession number:20130215889923

Title:Broadband tunable all-fiber polarization interference filter based on 45 tilted fiber gratings

Authors:Yan, Zhijun (1); Wang, Hushan (1); Zhou, Kaiming (1); Wang, Yishan (2); Zhao, Wei (2); Zhang, Lin (1)

Author affiliation:(1) Institute of Photonic and Technologies, Aston University, Birmingham, B4 7ET, United Kingdom; (2) StateKey Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Yan, Z.(yanz1@aston.ac.uk)

Source title:Journal of Lightwave Technology

Abbreviated source title:J Lightwave Technol

Volume:31

Issue:1

Issue date:2013

Publication year:2013

Pages:94-98

Article number:6332452

Language:English

ISSN:07338724

CODEN:JLTEDG

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., 445 Hoes Lane / P.O. Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:We have theoretically and experimentally designed and demonstrated an all-fiber polarization interference filter (AFPIF), which is formed by a polarization-maintaining (PM) fiber cavity structure utilizing two 45° tilted fiber gratings (45°-TFGs) inscribed by UV laser on the PM fiber. Such a filter could generate modulated transmission of linear polarization status. It has been revealed that the modulation depth of the transmission depends on the coupling angle between the 45°-TFGs and the PM fiber cavity. When the two 45°-TFGs in PM fiber are oriented at 45° to the principal axis of the PM fiber cavity, the maximum modulation depth is achievable. Due to the thermal effect on birefringence of the PM fiber, the AFPIF can be tuned over a broad wavelength range just by simple thermal tuning of the cavity. The experiment results show that the temperature tuning sensitivity is proportional to the length ratio of the PM fiber cavity under heating. For 18 and 40 cm long cavities with 6 cm part under heating, the thermal tuning sensitivities are 0.616 and 0.31 nm/° C, respectively, which are almost two orders of magnitude higher than normal fiber Bragg gratings. © 1983-2012 IEEE.

Number of references:20

Main heading:Fibers

Controlled terms:Fiber Bragg gratings - Modulation - Polarization - Polarization-maintaining fiber

Uncontrolled terms:All fiber - Coupling angles - Fiber cavity - Filter - Length ratio - Linear polarization - Modulation depth - Orders of magnitude - Polarization interferences - Principal axis - Temperature tuning - Thermal tuning - Tilted fiber gratings - Tunable filters - UV lasers - Wavelength ranges

Classification code:716 Telecommunication; Radar, Radio and Television - 717 Optical Communication - 718 Telephone Systems and Related Technologies; Line Communications - 741 Light, Optics and Optical Devices - 812 Ceramics, Refractories and Glass - 817 Plastics and Other Polymers: Products and Applications

DOI:10.1109/JLT.2012.2225022

Database:Compendex

Accession number:20132516432282

Title:An L-band graphene-oxide mode-locked fiber laser delivering bright and dark pulses

Authors:Zhao, J.Q. (1); Wang, Y.G. (2); Yan, P.G. (1); Ruan, S.C. (1); Zhang, G.L. (1); Li, H.Q. (1); Tsang, Y.H. (3)

Author affiliation:(1) Shenzhen Key Laboratory of Laser Engineering, Shenzhen University, Shenzhen 518060, Guangdong, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (3) Department of Applied Physics, Hong Kong Polytechnic University, Hong Kong, Hong Kong

Corresponding author:Yan, P.G.(yanpg@szu.edu.cn)

Source title:Laser Physics

Abbreviated source title:Laser Phys.

Volume:23

Issue:7

Issue date:July 2013

Publication year:2013

Article number:075105

Language:English

ISSN:1054660X

E-ISSN:15556611

Document type:Journal article (JA)

Publisher:Institute of Physics Publishing, Temple Circus, Temple Way, Bristol, BS1 6BE, United Kingdom

Abstract:In this work we have demonstrated the generation of L-band bright and dark pulses from a graphene-oxide (GO) mode-locked erbium-doped fiber laser. The polymer-hosted graphene-oxide saturable absorber (SA) was fabricated by a vertical evaporation method, which permitted a flexible choice of GO concentration and SA thickness. Stable fundamental solitons with a width of ~770 fs and repetition rate of ~21.79 MHz could be directly generated from the laser cavity. The corresponding spectrum was centered at ~ 1596.0 nm with a 3 dB bandwidth of ~4.454 nm. Triple solitons and fundamentally repetitive dark pulses could also be achieved. By changing the laser cavity design, we also achieved the generation of dark pulses, which had one to three times the repetition rate. The multiple soliton and dark pulse generation were experimentally observed for the first time in such a GO mode-locked fiber laser system, to the best of our knowledge. Our experimental results indicate that the GOSA can be successfully utilized to realize different mode-locked states in the L-band. © 2013 Astro Ltd.

Number of references:28

Main heading:Pulse generators

Controlled terms:Fiber lasers - Graphene - Laser resonators - Mode-locked fiber lasers - Saturable absorbers - Solitons

Uncontrolled terms:3 dB bandwidth - Cavity design - Dark pulse - Erbium doped fiber laser - Evaporation method - Fundamental solitons - Mode-locked - Repetition rate

Classification code:713.4 Pulse Circuits - 744 Lasers - 761 Nanotechnology - 804 Chemical Products Generally - 931.3 Atomic and Molecular Physics

DOI:10.1088/1054-660X/23/7/075105

Database:Compendex

Accession number:20135017073920

Title:Buried waveguide in neodymium-doped phosphate glass obtained by femtosecond laser writing using a double line approach

Authors:Long, Xuewen (1); Bai, Jing (1); Liu, Xin (1); Zhao, Wei (1); Cheng, Guanghua (1)

Corresponding author:Cheng, G.(gcheng@opt.ac.cn)

Source title:Chinese Optics Letters

Abbreviated source title:Chin. Opt. Lett.

Volume:11

Issue:10

Issue date:October 2013

Publication year:2013

Article number:102301

Language:English

ISSN:16717694

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:We fabricate a buried channel waveguide in neodymium-doped phosphate glass using a double line approach by femtosecond laser writing. Raman spectra reveal an expansion of the glass network in the laser irradiated region. Given the stress-induced positive refractive index change, waveguiding between two separated tracks is demonstrated. The refractive index difference profile of the waveguide is reconstructed from the measured near-field mode. Propagation loss is measured by scattering technique. Microluminescence spectra reveal that the Nd3+ fluorescence property is not significantly affected by waveguide formation process, which indicates that the inscribed waveguide is a good candidate for active device. © 2013 Chinese Optics Letters.

Number of references:16

Main heading:Waveguides

Controlled terms:Glass - Neodymium - Refractive index - Ultrashort pulses

Uncontrolled terms:Buried waveguide - Femtosecond laser writing - Fluorescence properties - Neodymium-doped phosphate glass - Refractive index changes - Refractive index differences - Scattering techniques - Waveguide formation

Classification code:547.2 Rare Earth Metals - 714.3 Waveguides - 741.1 Light/Optics - 744.1 Lasers, General - 812.3 Glass

DOI:10.3788/COL201311.102301

Database:Compendex

Accession number:20133216587637

Title:Application of norm theory in the wake bubble screen parameter study

Authors:Xu, Rui-Hua (1); Lv, Pei (1); Zhao, Juan-Ning (2)

Author affiliation:(1) Xi an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Xu, R.-H.(xuruihua@opt.ac.cn)

Source title:Guangdianzi Jiguang/Journal of Optoelectronics Laser

Abbreviated source title:Guangdianzi Jiguang

Volume:24

Issue:7

Issue date:July 2013

Publication year:2013

Pages:1380-1384

Language:Chinese

ISSN:10050086

CODEN:GUJIE9

Document type:Journal article (JA)

Publisher:Board of Optronics Lasers, No. 47 Yang-Liu-Qing Ying-Jian Road, Tian-Jin City, 300380, China

Abstract:Through researching the parameters of bubbly screen in the ship wake, the bubble movement characteristics can be found out. Also, the research and realization of the ship wake self-guide torpedo are based upon this characteristic. Currently, the wake research shortcomings include the measuring is complex, the measured value is susceptible to be impacted by the external environment, etc. From a new point of view, the norm theory is applied to measure the parameters of the ship wake bubble. A slice imaging system based on light sheet is used to acquire the ship wake bubble screen images in the experiment. We utilize the norm algorithm and the diameter size of the bubble to acquire the bubble density, uniformity distribution and the volume density of the bubble screen. According to the above parameters, the related information of the target ship can be analyzed and judged. The norm algorithm has many advantages compared with the conventional one, such as the less known information is needed, the algorithm is simple, the information obtained is informative, the judgement of the ships condition is accurate, and so on. This algorithm is expected to be used in acquiring the parameters of bubbly screen in the ship wake, and will have significant applications in the ship wake bubble screen research.

Number of references:17

Main heading:Wakes

Controlled terms:Algorithms - Research - Ships

Uncontrolled terms:Bubble movement - Bubble screen - External environments - Light sheet - Measured values - Norm theory - Point of views - Volume density

Classification code:921 Mathematics - 901.3 Engineering Research - 723 Computer Software, Data Handling and Applications - 674 Small Craft and Other Marine Craft - 672 Naval Vessels - 671 Naval Architecture - 631.1 Fluid Flow, General

Database:Compendex

Accession number:20132616448341

Title:An infrared imaging measuring method applied to check deviation of extended field view

Authors:Chen, Weining (1); Yang, Hongtao (1); Fan, Zheyuan (1); Cao, Jianzhong (1); Liu, Guangsen (1); Zhang, Jian (1); Wu, Dengshan (1); Zhang, Zhi (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Chen, W.(chenweining501@163.com)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:42

Issue:3

Issue date:March 2013

Publication year:2013

Pages:584-589

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:The working principle of an extended infrared optical system was introduced in this paper. Because the imaging is usually affected by the deviation of view field due to the assembly error of wedge lens after initialization of system, a new infrared imaging optical measuring method was put forward in order to check the deviation of view field in optical system. The method integrated infrared imaging system and the computer vision technology that was applied in measuring the trajectory of motion target. The infrared imaging system was used to image the motion targets. Then the trajectories of motion target were regarded as the sequence of discrete points. The computer vision technology was used to detect the trajectories of the points and collect the image of discrete points in the continuous motion of those targets. Later, the deviation of view field of extended infrared optical system was revised by image processing of the original image of the trajectory of motion target and simulation of actual trajectory of motion target using programming. The results show that the infrared imaging measuring system which is based on computer vision technology can efficiently complete the measuring of the trajectory of motion target.

Number of references:10

Main heading:Optical systems

Controlled terms:Computer vision - Image processing - Imaging systems - Lenses - Optical data processing - Thermography (imaging) - Trajectories

Uncontrolled terms:Computer vision technology - Continuous motions - Extended fields - Infrared optical systems - Optical measuring methods - Trajectories of motions - Working principles - Zero position

Classification code:404.1 Military Engineering - 741 Light, Optics and Optical Devices - 742.1 Photography - 746 Imaging Techniques

Database:Compendex

Accession number:20130916050961

Title:Gain-assisted trapping of light in tapered plasmonic waveguide

Authors:Wang, Guoxi (1); Lu, Hua (1); Liu, Xueming (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Liu, X.(liuxueming72@yahoo.com)

Source title:Optics Letters

Abbreviated source title:Opt. Lett.

Volume:38

Issue:4

Issue date:February 15, 2013

Publication year:2013

Pages:558-560

Language:English

ISSN:01469592

E-ISSN:15394794

CODEN:OPLEDP

Document type:Journal article (JA)

Publisher:Optical Society of America, 2010 Massachusetts Ave, NW, Washington, DC, DC 20036-1023, United States

Abstract:We have investigated the slow light and trapping effects in tapered metal-insulator-metal plasmonic waveguides. It is found that a significant reduction of group velocity (<0.01c) can be obtained when considering the intrinsic loss of realistic metal. The theoretical analysis shows that the group velocity can be further decreased, even approach zero in the lossless metallic waveguides. The perfect trapping of light is realized when an appropriate gain material is incorporated in the core layer to compensate metallic loss. The proposed ultracompact configuration may find excellent applications on nanoscale optical storages. © 2013 Optical Society of America.

Number of references:22

Main heading:Optical waveguides

Controlled terms:Light velocity

Uncontrolled terms:Core layers - Gain materials - Group velocities - Intrinsic loss - Lossless - Metal insulator metals - Metallic loss - Metallic waveguide - Nano scale - Optical Storage - Plasmonic waveguides - Tapered plasmonic waveguides - Trapping effects

Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems

DOI:10.1364/OL.38.000558

Database:Compendex

Accession number:20131616213960

Title:Design of the objective lens for endoscope with imaging fiber bundle

Authors:Yan, Xingtao (1); Yang, Jianfeng (1); Xue, Bin (1); Zhou, Ke (1); Zhao, Yiyi (1); Bu, Fan (1)

Author affiliation:(1) Spectral Imaging Technique Laboratory, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Yan, X.(xingtao.yan@163.com)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:42

Issue:2

Issue date:February 2013

Publication year:2013

Pages:423-427

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:For the endoscope with imaging fiber bundle, either the configuration or the imaging quality of its objective lens should satisfy some new requirements. Firstly, the fundamental of the objective lens design was analyzed, and the retrofocus objective lens was chosen as an initial structure for this design. Then an objective lens for the fiber-optic endoscope was designed with the software Zemax. The operation wavelength, focal length, FOV (field of view) and relative aperture of the designed lens are 0.38-0.78 μm, 0.921 mm, 100° and 1/4 respectively. Its total length is 10.32 mm. It's telecentric in image space. The MTF value of the lens is greater than 0.85 at the spatial frequency of 38 lp/mm. Furthermore, a model of the designed lens combined with the imaging fiber bundle was established in the software Tracepro. The coupling efficiency of the simulated system is about 96% and the illumination of output end is uniform. All the results show that the designed lens has the peculiarity of wide FOV, short focal length, logical configuration, high coupling efficiency and uniformity illumination at image plane. It is suitable for the fiber-optic endoscope.

Number of references:11

Main heading:Optical instrument lenses

Controlled terms:Endoscopy - Fiber optics - Fibers - Optical design

Uncontrolled terms:Applied optics - Coupling efficiency - Image space - Imaging fiber bundle - Initial structures - Objective lens - Operation wavelength - Short focal lengths

Classification code:461.6 Medicine and Pharmacology - 741 Light, Optics and Optical Devices - 812 Ceramics, Refractories and Glass - 817 Plastics and Other Polymers: Products and Applications

Database:Compendex

Accession number:20131116117468

Title:A single-walled carbon nanotube wall paper as an absorber for simultaneously achieving passively mode-locked and Q-switched Yb-doped fiber lasers

Authors:Li, Xiaohui (1); Wang, Yishan (2); Wang, Yonggang (3); Wang, Qijie (1); Zhao, Wei (2); Zhang, Yongzhe (1); Ya, Xia (4); Zhang, Ying (4)

Author affiliation:(1) Division of Microelectronics, School of Electrical and Electronic Engineering, Nanyang Technological University, 50, Nanyang Ave., 639798, Singapore, Singapore; (2) Department of Applied Physics, Materials Research Centre, Hong Kong Polytechnic University, Hong Kong, Hong Kong; (3) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (4) Singapore Institute of Manufacturing Technology, 71 Nanyang Drive, 638075 Singapore, Singapore

Corresponding author:Wang, Y.(yshwang@opt.ac.cn)

Source title:Proceedings - Winter Simulation Conference

Abbreviated source title:Proc. Winter Simul. Conf.

Monograph title:Proceedings of the 2013 IEEE 5th International Nanoelectronics Conference, INEC 2013

Issue date:2013

Publication year:2013

Pages:139-142

Article number:6465978

Language:English

ISSN:08917736

CODEN:WSCPDK

ISBN-13:9781467348416

Document type:Conference article (CA)

Conference name:2013 IEEE 5th International Nanoelectronics Conference, INEC 2013

Conference date:January 2, 2013 - January 4, 2013

Conference location:Singapore, Singapore

Conference code:95958

Sponsor:IEEE Nanotech Chapter; IEEE Singapore Section; BRUKER; CascadeMicrotech; GLOBAL - Office of Naval Research Science and Technology

Publisher:Institute of Electrical and Electronics Engineers Inc., 3 Park Avenue, 17th Floor, New York, NY 10016-5997, United States

Abstract:We demonstrate a fiber ring laser based on a single-walled carbon nanotube (SWCNT) wall paper absorber. It is found that the proposed Yb-doped fiber laser can either be operated in the mode-locked states or Q-switched states. First, SWCNT wall paper acts as a mode locker when the pump power is below 80 mW. Self-started mode locking can be obtained when the pump power is about 47 mW. The proposed Yb-doped mode-locked fiber lasers can be operated in the dissipative soliton regime that the spectra have a narrow peak. Second, SWCNT wall paper acts as a Q switcher when the pump power is above 80 mW. The Yb-doped fiber laser can work in the Q-switched states at higher pump power which is quite different from the conventional pulse fiber lasers. The repetition rate increases from 30 kHz to 50 kHz and the pulse duration decreases from 2.7 μs to 1 μs with the increase of pump power. This is due to the SWCNT wall paper induced loss in the cavity which leads to Q-switched state at higher pump powers. The combination of the Q-switching and mode-locking in one fiber laser have potential application in the fields that require different pulse fiber lasers. © 2013 IEEE.

Number of references:16

Main heading:Optical pumping

Controlled terms:Fiber lasers - Mode-locked fiber lasers - Nanoelectronics - Paper - Passive mode locking - Q switched lasers - Q switching - Ring lasers - Single-walled carbon nanotubes (SWCN) - Solitons - Ytterbium

Uncontrolled terms:Dissipative solitons - Fiber-ring lasers - Induced loss - Mode-locked - Passively mode-locked - Potential applications - Pulse durations - Pulse fiber laser - Pump power - Q-switched - Q-switching and mode-locking - Repetition rate - Single-walled carbon - Singlewalled carbon nanotube (SWCNT) - Wall papers - Yb-doped - Yb-doped fiber lasers

Classification code:933 Solid State Physics - 931.3 Atomic and Molecular Physics - 811.1 Pulp and Paper - 761 Nanotechnology - 744 Lasers - 741.1.2 Fiber Optics - 741.1 Light/Optics - 715 Electronic Equipment, General Purpose and Industrial - 547.2 Rare Earth Metals

DOI:10.1109/INEC.2013.6465978

Database:Compendex

Accession number:20135117103914

Title:Theoretical analysis of the Ho:YAG laser threshold characteristics

Authors:Wang, Fei (1); Shen, De-Yuan (1); Wang, Yi-Shan (1); Zhou, Wei (1); Ma, He-Feng (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Shen, D.-Y.(shendy@opt.ac.cn)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:42

Issue:10

Issue date:October 2013

Publication year:2013

Pages:1158-1162

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:Based on the theory of quasi-three-level, a model of threshold pump power of Ho:YAG laser was built and the formula of threshold pump power of Ho laser was derived. The relationship between the threshold pump power and the absorption efficiency of gain medium or the transmission of output coupler was analyzed. The mW-level threshold pump power of Ho laser can be obtained by optimizing parameters of Ho laser, which was pumped at 1907 nm or wing-pumped at 1930 nm. Furthermore, center wavelength lasing at 2092 nm or 2124 nm should be achievable by choosing an output coupler of suitable transmission.

Number of references:16

Main heading:Pumping (laser)

Controlled terms:Laser theory

Uncontrolled terms:Absorption efficiency - Center wavelength - Ho:YAG lasers - Optimizing parameters - Output couplers - Quasi-three-level - Threshold pump power - Wing-pumped

Classification code:744.1 Lasers, General

DOI:10.3788/gzxb20134210.1158

Database:Compendex

Accession number:20140517246456

Title:A level set with shape priors using moment-based alignment and locality preserving projections

Authors:Wang, Bin (1); Gao, Xinbo (1); Li, Jie (1); Li, Xuelong (2); Tao, Dacheng (3)

Author affiliation:(1) School of Electronic Engineering, Xidian University, Xi'an, Shaanxi 710071, China; (2) Center for OPTical IMagery Analysis and Learning (OPTIMAL), Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi 710119, China; (3) Centre for Quantum Computation and Intelligent Systems, University of Technology, Sydney, Australia

Source title:Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)

Abbreviated source title:Lect. Notes Comput. Sci.

Volume:8261 LNCS

Monograph title:Intelligence Science and Big Data Engineering - 4th International Conference, IScIDE 2013, Revised Selected Papers

Issue date:2013

Publication year:2013

Pages:697-704

Language:English

ISSN:03029743

E-ISSN:16113349

ISBN-13:9783642420566

Document type:Conference article (CA)

Conference name:4th International Conference on Intelligence Science and Big Data Engineering, IScIDE 2013

Conference date:July 31, 2013 - August 2, 2013

Conference location:Beijing, China

Conference code:102106

Publisher:Springer Verlag, Tiergartenstrasse 17, Heidelberg, D-69121, Germany

Abstract:A novel level set method (LSM) with shape priors is proposed to implement a shape-driven image segmentation. By using image moments, we deprive the shape priors of position, scale and angle information, consequently obtain the aligned shape priors. Considering that the shape priors sparsely distribute into the observation space, we utilize the locality preserving projections (LPP) to map them into a low dimensional subspace in which the probability distribution is predicted by using kernel density estimation. Finally, a new energy functional with shape priors is developed by combining the negative log-probability of shape priors with other data-driven energy items. We assess the proposed LSM on the synthetic, medical and natural images. The experimental results show that it is superior to the pure data-driven LSMs and the representative LSM with shape priors. © 2013 Springer-Verlag Berlin Heidelberg.

Number of references:24

Main heading:Image segmentation

Controlled terms:Probability distributions

Uncontrolled terms:Active contour model - Angle information - Kernel Density Estimation - Level Set - Locality preserving projections - Low-dimensional subspace - Observation space - Shape priors

Classification code:741.1 Light/Optics - 922.1 Probability Theory

DOI:10.1007/978-3-642-42057-3-88

Database:Compendex

Accession number:20134216860597

Title:Design of Gires-Tournois mirrors used for the dispersion compensation in femtosecond lasers

Authors:Liao, Chun-Yan (1); Qin, Jun-Jun (2); Shao, Jian-Da (3); Cheng, Guang-Hua (2); Fan, Zheng-Xiu (3); Hu, Man-Li (1)

Author affiliation:(1) Natl. Photoelectric Technol. and Functional Mat. and Appl. of Sci. and Technol. Intl. Coop. Base, Physics Department, Northwest University, Xi'an 710069, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (3) Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China

Corresponding author:Liao, C.-Y.(cyliao@nwu.edu.cn)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:42

Issue:8

Issue date:August 2013

Publication year:2013

Pages:967-972

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:Basic structure of Gires-Tournois mirror is described and the dispersion performance is calculated. The factors affecting the performance of the Gires-Tournois mirrors are discussed. The results show that the layer number of high reflector affects the reflectance of the Gires-Tournois mirrors but the thickness of the Gires-Tournois cavity and the layer number of the top reflector affect the dispersion performance of the Gires-Tournois mirrors; to achieve good design performance, the layer number of high reflector, the thickness of the Gires-Tournois cavity and the layer number of the top reflector are selected to be 40~60, λ/2 or λ and less than 5.

Number of references:17

Main heading:Laser mirrors

Controlled terms:Dispersion compensation - Dispersions - Mirrors - Optical films - Reflection

Uncontrolled terms:Basic structure - Dispersion performance - Gires-Tournois mirrors - Good designs - High reflector - Layer number - Ultrashort Laser

Classification code:711 Electromagnetic Waves - 741 Light, Optics and Optical Devices - 741.3 Optical Devices and Systems - 951 Materials Science

DOI:10.3788/gzxb20134208.0967

Database:Compendex

Accession number:20142217758445

Title:Temperature compensation in full optical fiber current transformer using signal processing

Authors:Li, Yuanyuan (1); Yang, Xiaojun (1); Xu, Jintao (1); Wang, Yingli (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, XIOPM, Xi'an, China

Source title:Proceedings - 6th International Symposium on Computational Intelligence and Design, ISCID 2013

Abbreviated source title:Proc. - Int. Symp. Comput. Intell. Des., ISCID

Volume:2

Monograph title:Proceedings - 6th International Symposium on Computational Intelligence and Design, ISCID 2013

Issue date:2013

Publication year:2013

Pages:227-230

Article number:6804869

Language:English

Document type:Conference article (CA)

Conference name:6th International Symposium on Computational Intelligence and Design, ISCID 2013

Conference date:October 28, 2013 - October 29, 2013

Conference location:Hangzhou, China

Conference code:105162

Sponsor:IEEE Nanjing Computational Intelligence Chapter; University of Bristol; Zhejiang Sci-Tech University; Zhejiang University

Publisher:IEEE Computer Society

Abstract:Error caused by temperature change is one of the major reasons for restricting the promotion of Full Optical Fiber Current Transformer (FOCT) at present. This article analyzes how the change of temperature makes impact on the parameters of optical devices, such as the original phase of quarter-wave plate and the Verdet constant of the fiber. After the experimental data are sampled in a temperature range from +20°C to +70°C, the relational model of error and temperature can be set up by adopting least-square method. After compensation based on this model, error could be decreased, meanwhile the precision of FOCT could be improved. Indeed, the experimental results verify that the accuracy of FOCT can be improved four times, compared with the original output without compensation. This method of compensation is quite effective to reduce the temperature influences on the FOCT to improve the accuracy. © 2013 IEEE.

Number of references:9

Main heading:Error compensation

Controlled terms:Artificial intelligence - Electric instrument transformers - Least squares approximations - Optical fibers - Signal processing - Temperature distribution

Uncontrolled terms:Accuracy - Change of temperatures - Fiber current transformers - FOCT - Least square methods - Least squares - Temperature compensation - Temperature influence

Classification code:641.1 Thermodynamics - 704 Electric Components and Equipment - 714 Electronic Components and Tubes - 716.1 Information Theory and Signal Processing - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 723.4 Artificial Intelligence - 741.1.2 Fiber Optics - 921.6 Numerical Methods

DOI:10.1109/ISCID.2013.170

Database:Compendex

Accession number:20134817030485

Title:Fast automatic exposure approach for color digital camera

Authors:Guo, Huinan (1); Cao, Jianzhong (1); Zhou, Zuofeng (1); Liao, Jiawen (1); Liu, Qing (1)

Corresponding author:Guo, H.(s09068@opt.cn)

Source title:Guangxue Xuebao/Acta Optica Sinica

Abbreviated source title:Guangxue Xuebao

Volume:33

Issue:10

Issue date:October 2013

Publication year:2013

Article number:1011003

Language:Chinese

ISSN:02532239

CODEN:GUXUDC

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:Exposure accuracy of color digital camera directly affects the performance of color image and the sensory effects of human visual. An automatic exposure method of digital camera based on the color perceiving properties of human visual system, is proposed. A novel kind of exposure estimation function is also established through objective evaluating the sharpness, color saturation and brightness of input images. According to the statistical theory and empirical formulas, the functional relationship between the exposure estimation values and exposure step increment is calibrated and the exposure increment function is established as well. For different brightness properties of current frame, using the exposure increment function, the ideal exposure value of next frame in real time is calculated. A large number of experimental results show that the proposed method for different scenes and different lighting conditions always has a good performance in adjusting exposure value of the captured image. Meanwhile, the algorithm has good robustness which can achieve adjustment for input frames in short time.

Number of references:9

Main heading:Function evaluation

Controlled terms:Color - Digital cameras - Image processing - Luminance - Optical engineering - Video cameras

Uncontrolled terms:Automatic exposure - Color digital cameras - Evaluation function - Exposure accuracies - Exposure estimation - Functional relationship - Human Visual System - Lighting conditions

Classification code:741 Light, Optics and Optical Devices - 741.1 Light/Optics - 742.2 Photographic Equipment - 921.6 Numerical Methods

DOI:10.3788/AOS201333.1011003

Database:Compendex

Accession number:20134717009744

Title:Optimal design of the laser communication optical system

Authors:Yan, Peipei (1); She, Wenji (1); Zhang, Hengjin (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy Sciences, Xinxi Dadao, New Industrial Park, High-tech Zone, Xi'an 710119, China

Corresponding author:Yan, P.(yppoptics@163.com)

Source title:Advanced Optoelectronics for Energy and Environment, AOEE 2013

Abbreviated source title:Adv. Optoelectron. Environ.

Monograph title:Advanced Optoelectronics for Energy and Environment, AOEE 2013

Issue date:2013

Publication year:2013

Pages:Asa3A.45

Language:English

ISBN-13:9781557529763

Document type:Conference article (CA)

Conference name:Advanced Optoelectronics for Energy and Environment, AOEE 2013

Conference date:May 25, 2013 - May 26, 2013

Conference location:Wuhan, China

Conference code:100559

Publisher:Optical Society of American (OSA), 2010 Massachusetts Ave, NW, Washington, DC, DC 20036, United States

Abstract:A design of a laser communications optical system with high transmitting and receiving performance is given. Considering the decrease of transmitting power caused by the obscuration of secondary mirror in traditional optical antenna, the eccentric-pupil Cassegrain optical antenna is designed. It improves the efficiency of transmitting power of optical communication terminal effectively. The system only uses one beam steering mirror to perform platform jitter compensation, one detector to perform spatial acquisition and tracking function, and an optical feedback for point-ahead compensation. The reduction in design complexity can lead to reduced system cost and improved system reliability. © OSA 2013.

Number of references:9

Main heading:Optical systems

Controlled terms:Electric power distribution - Feedback - Mirrors - Optical communication - Optical instruments - Optical links

Uncontrolled terms:Beam steering mirrors - Cassegrain optical antennas - Design complexity - Jitter compensation - Optical communication terminals - System reliability - Tracking function - Transmitting power

Classification code:706.1.2 Electric Power Distribution - 717.1 Optical Communication Systems - 731.1 Control Systems - 741.3 Optical Devices and Systems

Database:Compendex

Accession number:20133416641526

Title:Effects of different ligands on luminescence properties of LaF<inf>3</inf>: Nd nanoparticles

Authors:Gui, Luo (1); Cui, Xiaoxia (2); Wei, Wei (2); Peng, Bo (2); Fan, Dianyuan (1)

Author affiliation:(1) Key Laboratory on High Power Laser and Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences (CAS), Shanghai 201800, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences (CAS), Xi'an 710119, China

Corresponding author:Cui, X.(cuixx@opt.ac.cn)

Source title:Journal of Rare Earths

Abbreviated source title:J Rare Earth

Volume:31

Issue:7

Issue date:July 2013

Publication year:2013

Pages:645-649

Language:English

ISSN:10020721

CODEN:JREAE6

Document type:Journal article (JA)

Publisher:Chinese Rare Earth Society, 2 Xinjiekouwai Dajie, Beijing, 100088, China

Abstract:A series of neodymium-doped lanthanum fluoride nanoparticles (NPs) were synthesized with hydrothermal method, and the effects of several ligands on the luminescence properties of the NPs were investigated. The X-ray diffraction (XRD) results indicated that the crystal phases of the modified NPs coincided with the standard spectrum. The transmission electron microscopy (TEM) showed that the samples were of similar size, shape and dispersibility. The infrared spectra suggested that the content of -OH groups as quenchers on the NPs surfaces decreased after modification. Compared with NPs modified by branched paraffin ligands, NPs conjugating ring-contained modifiers had less quenching effect and possessed stronger fluorescence intensity and longer fluorescence lifetime. © 2013 The Chinese Society of Rare Earths.

Number of references:23

Main heading:Ligands

Controlled terms:Fluorescence - Light emission - Luminescence of inorganic solids - Nanoparticles - Rare earths - Synthesis (chemical) - Transmission electron microscopy - X ray diffraction

Uncontrolled terms:Branched paraffins - Fluorescence intensities - Fluorescence lifetimes - Hydrothermal methods - Infrared spectrum - Lanthanum fluoride - Luminescence properties - modification

Classification code:933.1.1 Crystal Lattice - 933 Solid State Physics - 802.2 Chemical Reactions - 801.4 Physical Chemistry - 761 Nanotechnology - 741.3 Optical Devices and Systems - 741.1 Light/Optics - 708 Electric and Magnetic Materials - 481.2 Geochemistry

DOI:10.1016/S1002-0721(12)60335-4

Database:Compendex

Accession number:20131116115690

Title:Study on adaptive modulation used in fading channels

Authors:Xin, Wang (1); Wei, Gao (1); Zongxi, Song (2)

Author affiliation:(1) Xi'an Institute of Optics Precision Mechanics, Chinese Academy of Science, Xi'an 710119, China; (2) Graduate School, Chinese Academy Sciences, Beijing 100684, China

Corresponding author:Xin, W.(xawangxin@yeah.net)

Source title:Applied Mechanics and Materials

Abbreviated source title:Appl. Mech. Mater.

Volume:303-306

Monograph title:Sensors, Measurement and Intelligent Materials

Issue date:2013

Publication year:2013

Pages:2068-2071

Language:English

ISSN:16609336

E-ISSN:16627482

ISBN-13:9783037856529

Document type:Conference article (CA)

Conference name:2012 International Conference on Sensors, Measurement and Intelligent Materials, ICSMIM 2012

Conference date:December 26, 2012 - December 27, 2012

Conference location:Guilin, China

Conference code:95893

Publisher:Trans Tech Publications, P.O. Box 1254, Clausthal-Zellerfeld, D-38670, Germany

Abstract:Most of traditional modulation and coding techniques do not adapt to fading or nonlinear conditions. These non-adaptive methods require a fix-link margin to maintain acceptable performance when the channel quality is poor. Thus, these systems are effectively designed for the worst-case channel conditions, resulting in insufficient utilization of the full channel capacity. Adapting to signal fading allows the channel to be used more efficiently since the power rate can be adjusted to take advantage of favorable channel conditions. In this paper, we present a simplifiedmathematical model to calculate the probability of SER for any given constellation of M-QAM. This model plays an important role in designing spectrally efficient adaptive modulation over nonlinear mobile channels. Instantaneous spectral efficiency and its histogram distribution are found for linear and nonlinear channel cases. © (2013) Trans Tech Publications, Switzerland.

Number of references:6

Main heading:Adaptive modulation

Controlled terms:Channel capacity - Fading channels - Intelligent materials - Sensors

Uncontrolled terms:Acceptable performance - Channel conditions - Channel quality - Mobile channels - Modulation and coding - Non-linear conditions - Nonlinear channel - Power rates - Predistortion techniques - Signal fading - Spectral efficiencies - Worst-case channel

Classification code:801 Chemistry - 718 Telephone Systems and Related Technologies; Line Communications - 717 Optical Communication - 716.1 Information Theory and Signal Processing - 716 Telecommunication; Radar, Radio and Television - 711.2 Electromagnetic Waves in Relation to Various Structures - 415 Metals, Plastics, Wood and Other Structural Materials

DOI:10.4028/www.scientific.net/AMM.303-306.2068

Database:Compendex

Accession number:20142217763348

Title:Reversal construction of polarization-controlled focusing field with multiple focal spots

Authors:Wang, Jiming (1); Liu, Qingliang (1); He, Chongjun (1); Liu, Youwen (1)

Author affiliation:(1) Nanjing University of Aeronautics and Astronautics, Department of Applied Physics, Nanjing 211106, China; (2) Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics, State Key Laboratory of Transient Optics and Photonics, Xi'an 710119, China; (3) 66 Vision-Tech. Co. Ltd., R and D Center, Suzhou 215005, China

Source title:Optical Engineering

Abbreviated source title:Opt Eng

Volume:52

Issue:4

Issue date:April 2013

Publication year:2013

Article number:048002

Language:English

ISSN:00913286

E-ISSN:15602303

CODEN:OPEGAR

Document type:Journal article (JA)

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:We propose an approach to control the polarization and intensity of the focusing field with multiple focal spots in a high-numerical-aperture imaging system. This focused field is explained as the reversal radiation of the dipole array with presupposed oscillating direction in the focal volume. By engineering the structure of the electric dipole array and reversing the radiation from this dipole array, the local manipulation of intensity and polarization in the focal region is achieved, and the required field at the pupil plane is derived. A focusing field with six vectorial focal spots is created as an example to verify this method. This multifocal field will meet potential application in polarization-dependent optical microscope and optical trapping for multiple particles. © 2013 Society of Photo-Optical Instrumentation Engineers (SPIE).

Number of references:19

Main heading:Polarization

Controlled terms:Focusing

Uncontrolled terms:Dipole arrays - Electric dipole - Focal regions - Focus shaping - Focused fields - Multiple particles - Opticaltrapping - Vector beams

Classification code:711.1 Electromagnetic Waves in Different Media

DOI:10.1117/1.OE.52.4.048002

Database:Compendex

Accession number:20133216576219

Title:Proposal on a single-shot correlator for measuring contrast ratio based on optical replication

Authors:Yuan, Suochao (1); Gao, Limin (1); Zhao, Juanning (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an 710119, China; (2) Graduate School of Chinese Academic of Sciences, Beijing 100039, China

Corresponding author:Yuan, S.

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8796

Monograph title:2nd International Symposium on Laser Interaction with Matter, LIMIS 2012

Issue date:2013

Publication year:2013

Article number:879629

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819496393

Document type:Conference article (CA)

Conference name:2nd International Symposium on Laser Interaction with Matter, LIMIS 2012

Conference date:September 9, 2012 - September 12, 2012

Conference location:Xi'an, Shaanxi, China

Conference code:97999

Sponsor:Northwest Institute of Nuclear Technology; Mechanics and Physics; Chinese Optical Society; European Laser Institute; The Optical Society

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:We propose a new idea to measure the temporal contrast of laser pulses in this paper. Unlike the traditional time-to-space transformation method, the design in this paper can be called a somewhat time-to-time transformation. A single-shot pulse beam is simultaneously divided into two separate beams by a beam splitter. The two beams then enter a pair of optical replicators respectively to generate two pulse sequences that have equal time intervals respectively. The time interval of the two sequences alters by about 100fs that we can use one sequence to scan the other at a time resolution of 100fs through a nonlinear crystal. The time resolution depends on the altering of time interval and the time window depends on the pulse number of the sequence. This method can avoid the spatial modulation of the laser pulse. On the other side, the time resolution and time window are adjustable. It is also possible to measure the high contrast with a low-dynamic- range detector by attenuating the power of each pulse in the sequence respectively. © 2013 SPIE.

Number of references:13

Main heading:Pulse generators

Controlled terms:Laser pulses - Laser tissue interaction - Plasma interactions

Uncontrolled terms:Nonlinear crystals - Optical replication - Pulse replication - Single-shot - Single-shot correlators - Spatial modulations - Temporal contrast - Transformation methods

Classification code:713.4 Pulse Circuits - 744.1 Lasers, General - 744.8 Laser Beam Interactions - 932.3 Plasma Physics

DOI:10.1117/12.2006555

Database:Compendex

Accession number:20134316876221

Title:Person re-identification by regularized smoothing kiss metric learning

Authors:Tao, Dapeng (1); Jin, Lianwen (1); Wang, Yongfei (1); Yuan, Yuan (2); Li, Xuelong (2)

Author affiliation:(1) School of Electronic and Information Engineering, South China University of Technology, GuangZhou 510640, China; (2) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Xi'an 710119, China

Corresponding author:Tao, D.

Source title:IEEE Transactions on Circuits and Systems for Video Technology

Abbreviated source title:IEEE Trans Circuits Syst Video Technol

Volume:23

Issue:10

Issue date:2013

Publication year:2013

Pages:1675-1685

Article number:6490028

Language:English

ISSN:10518215

CODEN:ITCTEM

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., 445 Hoes Lane / P.O. Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:With the rapid development of the intelligent video surveillance (IVS), person re-identification, which is a difficult yet unavoidable problem in video surveillance, has received increasing attention in recent years. That is because computer capacity has shown remarkable progress and the task of person re-identification plays a critical role in video surveillance systems. In short, person re-identification aims to find an individual again that has been observed over different cameras. It has been reported that KISS metric learning has obtained the state of the art performance for person re-identification on the VIPeR dataset . However, given a small size training set, the estimation to the inverse of a covariance matrix is not stable and thus the resulting performance can be poor. In this paper, we present regularized smoothing KISS metric learning (RS-KISS) by seamlessly integrating smoothing and regularization techniques for robustly estimating covariance matrices. RS-KISS is superior to KISS, because RS-KISS can enlarge the underestimated small eigenvalues and can reduce the overestimated large eigenvalues of the estimated covariance matrix in an effective way. By providing additional data, we can obtain a more robust model by RS-KISS. However, retraining RS-KISS on all the available examples in a straightforward way is time consuming, so we introduce incremental learning to RS-KISS. We thoroughly conduct experiments on the VIPeR dataset and verify that 1) RS-KISS completely beats all available results for person re-identification and 2) incremental RS-KISS performs as well as RS-KISS but reduces the computational cost significantly. © 1991-2012 IEEE.

Number of references:71

Main heading:Security systems

Controlled terms:Covariance matrix - Eigenvalues and eigenfunctions

Uncontrolled terms:Covariance matrices - Incremental learning - Intelligent video surveillance - Metric learning - Person re identifications - Regularization technique - State-of-the-art performance - Video surveillance systems

Classification code:914.1 Accidents and Accident Prevention - 921 Mathematics - 921.1 Algebra - 922 Statistical Methods

DOI:10.1109/TCSVT.2013.2255413

Database:Compendex

Accession number:20133016530649

Title:The design of a hybrid diffractive-refractive wide-angle eyepiece with a large exit pupil distance

Authors:Wang, Feng (1); Cao, Jian-Zhong (1); Qu, En-Shi (1); Yu, Deng-Qun (1); Yan, A. Qi (1); Zhang, Jian (1); Guo, Hui-Nan (1); Zhao, Xiao-Dong (1); Fan, Zhe-Yuan (1); Tao, Jin-You (1)

Author affiliation:(1) Xi'an Institute of Optical and Precision Mechanics of Chinese Academy of Sciences, Xi'an, 710119, China; (2) University of Chinese Academy of Sciences, Beijing, 100039, China

Source title:Advanced Materials Research

Abbreviated source title:Adv. Mater. Res.

Volume:710

Monograph title:Advanced Technologies and Solutions in Industry

Issue date:2013

Publication year:2013

Pages:469-473

Language:English

ISSN:10226680

ISBN-13:9783037857205

Document type:Conference article (CA)

Conference name:2013 International Conference on Advanced Technologies and Solutions in Industry, ICATSI 2013

Conference date:March 22, 2013 - March 23, 2013

Conference location:Taiyuan, Shanxi, China

Conference code:97849

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:The diffractive optical elements, with the negative dispersive characteristic and the random phase distributing to realize random phase modulation for wave-front, are not only helpful to simplify the optical system, but also improve the image quality, while putting it into the optical system. It can decrease the element numbers of the system and obtain a compact configuration that introducing diffractive optical element into the design of eyepiece. A hybrid diffractive-refractive wide-angle eyepiece, with a big exit pupil distance, is designed by using the Code V Optical Design Software. The features of the wide-angle eyepiece are 30mm effective focal length, 60°whole field-of-view (FOV), 30mm exit pupil distance and 6mm exit pupil diameter, and which consists of four lens and two diffractive elements. From the result of design, the MTF in the center field of the wide-angle eyepiece is over 0.55at 60lp/mm, at the same time, the MTFs in all fields are over 0.3 at 50lp/mm, which show that this wide-angle eyepiece has a great image quality. © (2013) Trans Tech Publications, Switzerland.

Number of references:14

Main heading:Optical systems

Controlled terms:Density (optical) - Diffractive optical elements - Image quality - Optical design - Phase modulation

Uncontrolled terms:Applied optics - Diffractive element - Dispersive characteristic - Effective focal lengths - Element numbers - Exit pupil - Hybrid diffractive-refractive - Optical-design software

Classification code:716 Telecommunication; Radar, Radio and Television - 741 Light, Optics and Optical Devices

DOI:10.4028/www.scientific.net/AMR.710.469

Database:Compendex

Accession number:20130315912426

Title:Femtosecond nonlinear optical property of a TeO<inf>2</inf>-ZnO-Na <inf>2</inf>O glass and its application in time-resolved three-dimensional imaging

Authors:Tan, Wenjiang (1); Zhou, Zhiguang (2); Lin, Aoxiang (2); Si, Jinhai (1); Tong, Junyi (1); Hou, Xun (1)

Author affiliation:(1) Shaanxi Key Laboratory of Information Photonic Technique, School of Electronic and Information Engineering, Xi'An Jiaotong University, Xianning-xilu 28, Xi'an 710049, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi'an 710119, China

Corresponding author:Si, J.(jinhaisi@mail.xjtu.edu.cn)

Source title:Optics Communications

Abbreviated source title:Opt Commun

Volume:291

Issue date:March 15, 2013

Publication year:2013

Pages:337-340

Language:English

ISSN:00304018

CODEN:OPCOB8

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:Compared with bismuth glasses and chalcogenide glasses, tellurite glasses have a wider transparency window. Especially, these glasses with excellent transparency in visible region could offer a larger dynamic range for the time-resolved simultaneous three-dimensional imaging based on the optical Kerr gate (OKG). We investigated the ultrafast nonlinear optical properties of a TeO<inf>2</inf>-ZnO-Na<inf>2</inf>O glass using a femtosecond optical Kerr gate at wavelength of 800 nm. The nonlinear refraction n<inf>2</inf> and the ultrafast nonlinear response time of the tellurite glass were estimated to be 4.56×10-15 cm2/W and less than 200 fs, respectively. We also demonstrated the time-resolved simultaneous three-dimensional imaging using the tellurite glass as the Kerr medium, which indicated that tellurite glasses may also be good candidates as the Kerr media for the time-resolved imaging based on the OKG. © 2012 Elsevier B.V.

Number of references:26

Main heading:Glass

Controlled terms:Bismuth - Imaging systems - Nonlinear optics - Sodium - Tellurium compounds - Transparency - Zinc oxide

Uncontrolled terms:Bismuth glass - Chalcogenide glass - Dynamic range - Femtoseconds - Kerr media - Kerr medium - Non-linear optical properties - Non-linear refraction - Optical Kerr gate - Tellurite glass - Three dimensional imaging - Time resolved imaging - Time-resolved - Ultrafast nonlinear - Ultrafast nonlinear response - Visible region

Classification code:549.1 Alkali Metals - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 741 Light, Optics and Optical Devices - 746 Imaging Techniques - 804.2 Inorganic Compounds - 812.3 Glass

DOI:10.1016/j.optcom.2012.11.035

Database:Compendex

Accession number:20133416640450

Title:Robust probabilistic tensor analysis for time-variant collaborative filtering

Authors:Pan, Jing (1); Ma, Zhao (2); Pang, Yanwei (2); Yuan, Yuan (3)

Author affiliation:(1) School of Electronic Engineering, Tianjin University of Technology and Education, Tianjin 300222, China; (2) School of Electronic Information Engineering, Tianjin University, Tianjin 300072, China; (3) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China

Corresponding author:Pang, Y.(pyw@tju.edu.cn)

Source title:Neurocomputing

Abbreviated source title:Neurocomputing

Volume:119

Issue date:November 7, 2013

Publication year:2013

Pages:139-143

Language:English

ISSN:09252312

E-ISSN:18728286

CODEN:NRCGEO

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:The input data of collaborative filtering, also known as recommendation system, are usually sparse and noisy. In addition, in many cases the data are time-variant and have obvious periodic property. In this paper, we take the two characteristics into account. To utilize the time-variant and periodic properties, we describe the data as a three-order tensor and then formulate the collaborative filtering as a problem of probabilistic tensor decomposition with a time-periodical constraint. The robustness is achieved by employing Tsallis divergence to describe the objective function and q-EM algorithm to find the optimal solution. The proposed method is demonstrated on movie recommendation. Experimental results on two Netflix and Movielens databases show the superiority of the proposed method. © 2012 Elsevier B.V.

Number of references:29

Main heading:Tensors

Controlled terms:Algorithms - Collaborative filtering

Uncontrolled terms:Movie recommendations - Objective functions - Optimal solutions - Periodic properties - Tensor analysis - Tensor decomposition - Time variant - Topic model

Classification code:723 Computer Software, Data Handling and Applications - 903.1 Information Sources and Analysis - 921 Mathematics - 921.1 Algebra

DOI:10.1016/j.neucom.2012.03.035

Database:Compendex

Accession number:20131116122166

Title:Synthesis of a terpolymer containing fluorene, side chain conjugated thiophene and benzothiadiazole and its applications in photovoltaic devices

Authors:Liu, Hongli (1); Qu, Bo (2); Chen, Jian (1); Cong, Zhiyuan (1); An, Zhongwei (1); Gao, Chao (1); Xiao, Lixin (2); Chen, Zhijian (2); Gong, Qihuang (2)

Author affiliation:(1) Xi'An Modern Chemistry Research Institute, Xi'an Shaanxi, 710065, China; (2) State Key Laboratory for Artificial Microstructures and Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science (CAS), Xi'an Shaanxi, 710119, China

Corresponding author:Qu, B.(bqu@pku.edu.cn)

Source title:Journal of Applied Polymer Science

Abbreviated source title:J. Appl. Polym. Sci.

Volume:128

Issue:5

Issue date:June 5, 2013

Publication year:2013

Pages:3250-3255

Language:English

ISSN:00218995

E-ISSN:10974628

CODEN:JAPNAB

Document type:Journal article (JA)

Publisher:John Wiley and Sons Inc., P.O.Box 18667, Newark, NJ 07191-8667, United States

Abstract:A terpolymer (POTVTh-8FO-DBT) containing fluorene, side chain conjugated thiophene and 4,7-dithieny-2,1,3-benzothiadiazole was synthesized by palladium-catalyzed Suzuki coupling method. The polymer is soluble in common organic solvents. The thermal, absorption, and electrochemical properties of the polymer were examined. Photovoltaic properties of POTVTh-8FO-DBT were studied by fabricating the polymer solar cells (PSCs) based on POTVTh-8FO-DBT as donor and [6,6]-phenyl-C61-butyric acid methyl ester (PC<inf>61</inf>BM) as acceptor. With the weight ratio of POTVTh-8FO-DBT: PC<inf>61</inf>BM of 1: 1 and the active layer thickness of 80 nm, the power conversion efficiency (PCE) of the device reached 0.47% with V<inf>oc</inf> = 0.61 V, J<inf>sc</inf> = 1.61 mA/cm2, and filled factor (FF) = 0.49 under the illumination of AM 1.5, 100 mW/cm2. The results indicated that this polymer was promising donor candidates in the application of PSCs. © 2012 Wiley Periodicals, Inc.

Number of references:28

Main heading:Polymers

Controlled terms:Copolymers - Organic solvents - Solar cells - Thiophene

Uncontrolled terms:1 ,3-benzothiadiazole - [6 ,6]-phenyl-C61-butyric acid methyl esters - Photovoltaic applications - Photovoltaic property - Polymer solar cell (PSCs) - Power conversion efficiencies - Side chain conjugated - Synthesis and processing

Classification code:615.2 Solar Power - 804.1 Organic Compounds - 815.1 Polymeric Materials

DOI:10.1002/app.38528

Database:Compendex

Accession number:20133416646437

Title:Travelling wave deflecting characteristics of streak-tube

Authors:Li, Hao (1); Tian, Jin-Shou (1); Li, Yan (3); Wang, Chao (1); Wen, Wen-Long (1); Wang, Jun-Feng (1); Wang, Xing-Chao (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) Graduate University of Chinese Academy of Sciences, Beijing 100049, China; (3) Xi'an Shiyou University, Xi'an 710065, China

Corresponding author:Tian, J.-S.(tianjs@opt.ac.cn)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:42

Issue:7

Issue date:July 2013

Publication year:2013

Pages:792-796

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:In order to obtain deflection device having wide bandwidth, small dispersion and high deflection sensitivity, a kind of traveling wave deflector is designed. Using commercial electromagnetic simulation software CST finite element method, bandwidth of traveling wave deflector in streak camera is studied, and the travelling wave deflector characteristics of dispersion curves, characteristic impedance changing with frequency and electron beam deflecting function are studied numerically using finite integration method. The comparison of deflecting sensitivity between traveling wave deflector and traditional plating deflector is made. Moreover, the electric field distribution in traveling wave deflector with sinewave scanning voltage signal is simulated. The results show that bandwidth of sharp top deflector is bigger than that of round top deflector and that bandwidth becomes smaller when legs of deflector become longer, with the biggest bandwidth of 7 GHz; phase velocity and group velocity decrease with the increasing of frequency; when frequency increases, a peak value exists for characteristic impedance; under the same dimensions, the deflecting sensitivity of travelling wave detector is two times higher than that of plating deflector; the electric field produced by sinewave scanning voltage appears periodic; the designed traveling wave deflector has wide bandwidth, of which dispersion is small in wide frequency range, and it can effectively make electron beam deflect.

Number of references:17

Main heading:Bandwidth

Controlled terms:Dispersion (waves) - Electric fields - Electron beams - Slow wave structures - Wave transmission

Uncontrolled terms:Characteristic impedance - Deflection sensitivities - Dispersion characteristics - Electric field distributions - Electromagnetic simulation - Finite integration method - Travelling-wave deflector - Wide frequency range

Classification code:701.1 Electricity: Basic Concepts and Phenomena - 711 Electromagnetic Waves - 711.1 Electromagnetic Waves in Different Media - 714.3 Waveguides - 716.1 Information Theory and Signal Processing - 932 High Energy Physics; Nuclear Physics; Plasma Physics

DOI:10.3788/gzxb20134207.0792

Database:Compendex

Accession number:20130315915091

Title:Atmospheric channel simplification single scatter model

Authors:Tang, Yi'nan (1); Zhao, Wei (1); Xie, Xiaoping (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an 710119, China; (2) Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Tang, Y.(tangyinan@opt.ac.cn)

Source title:Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams

Abbreviated source title:Qiangjiguang Yu Lizishu

Volume:25

Issue:1

Issue date:January 2013

Publication year:2013

Pages:22-26

Language:Chinese

ISSN:10014322

CODEN:QYLIEL

Document type:Journal article (JA)

Publisher:Editorial Office of High Power Laser and Particle Beams, P.O. Box 919-805, Mianyang, 621900, China

Abstract:Most existing study on non-line-of-sight solar-blind ultraviolet communication single scatter models use the prolate-spheroidal coordinates to obtain solutions. In the solving process, the effective scattering volume must undergo the difficult numerical integration and the three groups of integral limits which determine the volume can be calculated. The widely adopted yet complex single-scatter channel model is significantly simplified by means of a closed-form expression for tractable analysis in this paper. And the path loss is given as a function of transceiver geometries as well as scattering and absorption coefficient. The simulation results of transmission distance and path loss show that the approximated path loss matches that from direct numerical integration very well. Using the closed-form expression of path loss, the influence of atmospheric visibility on the path loss and bit-error-rate of the ultraviolet communication system is simulated. The simulation results show that; the better weather and the higher visibility do not result in greater system performances, but when the visibility equals 9-10 km, the best performance can be obtained.

Number of references:15

Main heading:Visibility

Controlled terms:Communication systems

Uncontrolled terms:Atmospheric visibility - Channel model - Closed-form expression - Non-line-of-sight - Numerical integrations - Path loss - Scattering and absorption - Single-scatter - Solar-blind - Tractable analysis - Transmission distances

Classification code:716 Telecommunication; Radar, Radio and Television - 741.2 Vision

DOI:10.3788/HPLPB20132501.0022

Database:Compendex

Accession number:20135217144920

Title:Design and development of a static X-ray imaging system used on SG-III laser facility

Authors:Yang, Pin (1); Yang, Zhenghua (1); Li, Jin (1); Dong, Jianjun (1); Cao, Zhurong (1); Yan, Yadong (2); Wang, Wei (2); Wei, Mingzhi (2); Liu, Shenye (1)

Author affiliation:(1) Research Center of Laser Fusion, CAEP, P.O. Box 919-986, Mianyang 621900, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Yang, Z.(yzh@caep.ac.cn)

Source title:Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams

Abbreviated source title:Qiangjiguang Yu Lizishu

Volume:25

Issue:11

Issue date:2013

Publication year:2013

Pages:2895-2899

Language:Chinese

ISSN:10014322

CODEN:QYLIEL

Document type:Journal article (JA)

Publisher:Editorial Office of High Power Laser and Particle Beams, P.O. Box 919-805, Mianyang, 621900, China

Abstract:According to the target chamber structure and shooting mode of SG-III laser facility, a static X-ray imaging system (SXI) has been successfully developed based on the principle of pin-hole imaging. This system uses the imitated target for off-line targeting, and can be adjusted on-line, with the regulation accuracy of 81 μm and 40 μm. The pinhole component and filter component can be changed automatically, which realizes fast online aiming and running in vacuum environment. The displacement and stress were calculated using the software ANSYS to ensure the reliability of this system. Laser targeting evaluation of the system equipped with X-ray CCD has been conducted on SG-III laser facility. The result shows that the system reaches the requirement of the SG-III laser facility.

Number of references:10

Main heading:X ray analysis

Controlled terms:Imaging systems - Software reliability

Uncontrolled terms:Design and Development - Displacement and stress - Laser facilities - Off-line targeting - Software ANSYS - Target chambers - X ray imaging system - Xray imaging

Classification code:421 Strength of Building Materials; Mechanical Properties - 741 Light, Optics and Optical Devices - 746 Imaging Techniques - 801 Chemistry - 913.3 Quality Assurance and Control - 951 Materials Science

DOI:10.3788/HPLPB20132511.2895

Database:Compendex

Accession number:20134216860614

Title:Performance of the detection system for X-ray pulsar based navigation

Authors:Sheng, Li-Zhi (1); Zhao, Bao-Sheng (1); Zhou, Feng (1); Wang, Peng (1); Song, Juan (1); Liu, Yong-An (1); Shen, Jing-Shi (3); Hu, Hui-Jun (3); Ma, Xiao-Fei (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100049, China; (3) Shandong Aerospace Electro-Technology Institute, Yantai, Shandong 264670, China

Corresponding author:Zhao, B.-S.(open@opt.ac.cn)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:42

Issue:9

Issue date:September 2013

Publication year:2013

Pages:1071-1076

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:In order to assess the performance of detection system for X-ray pulsar navigation, the expression of the signal-to-noise ratio (SNR) and the minimum detectable power are derived in the photon counting mode of the system. Experiment system to measure the SNR and the minimum detectable power is setup. The minimum detectable power is measured; the SNRs at different integration time, optical power and threshold voltage are calculated. The X-ray pulse profile is reconstructed by measuring the time of arrival (TOA) of the X-ray photons. Experimental results show that the SNR of the pulse profile is improved and the curve of the pulse profile tends to smooth with the increasing of optical power and the integration time; the SNR is 26.3 and the pulse profile is optimal when the threshold voltage is -150 mV; the minimum detectable power of the system is 3.5×10-16 W.

Number of references:15

Main heading:X rays

Controlled terms:Electromagnetic wave emission - Image storage tubes - Navigation - Signal to noise ratio - Threshold voltage

Uncontrolled terms:Micro channel plate - Minimum detectable power - Signaltonoise ratio (SNR) - Single photon detection - X-ray pulsars

Classification code:711 Electromagnetic Waves - 714.1 Electron Tubes - 714.2 Semiconductor Devices and Integrated Circuits - 716.1 Information Theory and Signal Processing - 716.3 Radio Systems and Equipment - 932.1 High Energy Physics

DOI:10.3788/gzxb20134209.1071

Database:Compendex

Accession number:201439073586

Title:Topographic NMF for data representation

Authors:Xiao, Yanhui (1); Zhu, Zhenfeng (1); Zhao, Yao (3); Wei, Yunchao (1); Wei, Shikui (1); Li, Xuelong (4)

Author affiliation:(1) Institute of Information Science, Beijing Jiaotong University, Beijing, China; (2) Beijing Key Laboratory of Advanced Information Science and Network Technology, Beijing, China; (3) Institute of Information Science, Beijing Jiaotong University, State Key Laboratory of Rail Traffic Control and Safety, Beijing, China; (4) Center for OPTical IMagery Analysis and Learning (OPTIMAL), Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China

Corresponding author:Xiao, Yanhui

Source title:IEEE Transactions on Cybernetics

Abbreviated source title:IEEE Trans. Cybern.

Volume:44

Issue:10

Issue date:October 1, 2014

Publication year:2013

Pages:1762-1771

Article number:6689294

Language:English

ISSN:21682267

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:Nonnegative matrix factorization (NMF) is a useful technique to explore a parts-based representation by decomposing the original data matrix into a few parts-based basis vectors and encodings with nonnegative constraints. It has been widely used in image processing and pattern recognition tasks due to its psychological and physiological interpretation of natural data whose representation may be parts-based in human brain. However, the nonnegative constraint for matrix factorization is generally not sufficient to produce representations that are robust to local transformations. To overcome this problem, in this paper, we proposed a topographic NMF (TNMF), which imposes a topographic constraint on the encoding factor as a regularizer during matrix factorization. In essence, the topographic constraint is a two-layered network, which contains the square nonlinearity in the first layer and the square-root nonlinearity in the second layer. By pooling together the structure-correlated features belonging to the same hidden topic, the TNMF will force the encodings to be organized in a topographical map. Thus, the feature invariance can be promoted. Some experiments carried out on three standard datasets validate the effectiveness of our method in comparison to the state-of-the-art approaches.

Number of references:34

Main heading:Learning systems

Uncontrolled terms:Data clustering - Data representations - Dimension reduction - Nonnegative matrix factorization

Classification code:731.5 Robotics

DOI:10.1109/TCYB.2013.2294215

Database:Compendex

Accession number:20141317510169

Title:Color interpolation algorithm of CCD based on green components and signal correlation

Authors:Liang, Xiaofen (1); Qiao, Weidong (1); Yang, Jianfeng (1); Xue, Bin (1); Qin, Jia (1)

Author affiliation:(1) Key Laboratory of Spectrum Imaging Technology, Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an, 710119, China; (2) University of Chinese Academy of Science, Beijing, 100039, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8907

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications

Issue date:2013

Publication year:2013

Article number:890738

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497765

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:Signal CCD/CMOS sensors capture image information by covering the sensor surface with a color filter array(CFA). For each pixel, only one of three primary colors(red, green and blue) can pass through the color filter array(CFA). The other two missing color components are estimated by the values of the surrounding pixels. In Bayer array, the green components are half of the total pixels, but both red pixel and blue pixel components are quarter, so green components contain more information, which can be reference to color interpolation of red components and blue components. Based on this principle, in this paper, a simple and effective color interpolation algorithm based on green components and signal correlation for Bayer pattern images was proposed. The first step is to interpolate R, G and B components using the method-bilinear interpolation. The second step is to revise the results of bilinear interpolation by adding some green components on the results of bilinear interpolation. The calculation of the values to be added should consider the influence of correlation between the three channels. There are two major contributions in the paper. The first one is to demosaick G component more precisely. The second one is the spectral-spatial correlations between the three color channels is taken into consideration. At last, through MATLAB simulation experiments, experimental pictures and quantitative data for performance evaluation-Peak Signal to Noise Ratio(PSNR) were gotten. The results of simulation experiments show, compared with other color interpolation algorithms, the proposed algorithm performs well in both visual perception and PSNR measurement. And the proposed algorithm does not increase the complexity of calculation but ensures the real-time of system. Theory and experiments show the method is reasonable and has important engineering significance. © 2013 Copyright SPIE.

Number of references:11

Main heading:Experiments

Controlled terms:Algorithms - Color - Color image processing - Interpolation - MATLAB - Pixels - Sensors - Signal detection - Thermography (imaging)

Uncontrolled terms:Bayer pattern images - Bilinear interpolation - Color filter arrays - Demosaicing - Interpolation algorithms - PSNR - Red , green and blues - Three primary colors

Classification code:716.1 Information Theory and Signal Processing - 723 Computer Software, Data Handling and Applications - 723.5 Computer Applications - 741.1 Light/Optics - 742.1 Photography - 742.2 Photographic Equipment - 801 Chemistry - 901.3 Engineering Research - 921 Mathematics - 921.6 Numerical Methods

DOI:10.1117/12.2033293

Database:Compendex

Accession number:20134316904279

Title:1.23 μm emission of Er/Pr-doped water-free fluorotellurite glasses

Authors:Zhan, Huan (1); Zhang, Aidong (2); He, Jianli (2); Zhou, Zhiguang (2); Si, Jinhai (1); Lin, Aoxiang (2)

Author affiliation:(1) Key Laboratory for Physical Electronics, School of Electronic and Information Engineering, Xi'an Jiaotong University, Xianning-xilu 28, Xi'an 710049, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics(XIOPM), Chinese Academy of Sciences (CAS), Xi'an 710119, China

Corresponding author:Lin, A.(aoxiang@opt.ac.cn)

Source title:Applied Optics

Abbreviated source title:Appl. Opt.

Volume:52

Issue:28

Issue date:October 1, 2013

Publication year:2013

Pages:7002-7006

Language:English

ISSN:1559128X

E-ISSN:15394522

CODEN:APOPAI

Document type:Journal article (JA)

Publisher:Optical Society of American (OSA)

Abstract:To investigate the relatively unexplored 1.2 μm region, we identified a near-infrared emission at around 1.23 μm from Er3/Pr3-codoped water-free fluorotellurite glass with a composition of 60TeO2-30ZnF2-10NaF (TZNF60, mol. %). Under the condition of pumping with the 488 nm optical parametric oscillator (OPO) laser system, the directly measured lifetime (tf ) at 1.23 μm in Er/Pr-codoped fluorotellurite glasses is about 111.2 μs, much longer than that of Er-doped fluorotellurite glass (80.1 μs). The stimulated emission cross section (sem) and quantum efficiency (?) for Er3:4S3/2 ? 4I11/2 transition are greatly enhanced when appropriate Pr3 ions are incorporated. These advances arise partially from the absence of the hydroxyl (OH) group and low phonon energy with the addition of a large amount of fluorides into oxide-based host glasses. With high quantum efficiency (56.2%) and a large stimulated cross section (4.03 × 10-21 cm2), Er3/Pr3-codoped TZNF60 glass is regarded as promising material for the development of optical amplification and laser operation at the relatively unexplored 1.2 μm region. © 2013 Optical Society of America.

Number of references:27

Main heading:Glass

Controlled terms:Doping (additives) - Optical parametric oscillators - Pumping (laser) - Quantum efficiency

Uncontrolled terms:Fluoro-tellurite glass - High quantum efficiency - Large amounts - Laser operations - Low phonon energies - Near-infrared emissions - Optical amplifications - Stimulated emission cross section

Classification code:744.1 Lasers, General - 744.9 Laser Applications - 801 Chemistry - 812.3 Glass - 931.4 Quantum Theory; Quantum Mechanics

DOI:10.1364/AO.52.007002

Database:Compendex

Accession number:20141317510222

Title:Development of the electronics system prototype of the panoramic camera for space applications

Authors:Duan, Yong-Qiang (1); Gao, Wei (1); Qiao, Wei-Dong (1); Yang, Jian-Feng (1); Wen, De-Sheng (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, 710119, China; (2) University of Chinese Academy of Sciences (CAS), Beijing, 100039, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8907

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications

Issue date:2013

Publication year:2013

Article number:89074S

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497765

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:The stereoscopic panoramic camera is a kind of important optical payload for space applications. It can image the full 360° in azimuth to the goal scene and obtain high resolution three-dimensional images. Many science investigations can be conducted by scientists with these images, such as the analysis for the planet terrain and the geology. This kind of payload has common features such as light-weight, miniaturization, and lower power consumption. This paper presents the development of a stereoscopic, panoramic imaging system for space applications, which is a typical staring binocular stereo imaging system and consists of two identical digital cameras. Each camera was build based upon a CMOS APS (Complementary Metal Oxide Semiconductor Active Pixel Sensors) and a high density FPGA (Field Programmable Gate Array). The camera has the features with the weight of about 210g and the power consumption of about 660mW. In this paper, the design details of the electronics for the specifications above are emphasized, and the designs and implements of the FPGA are particularly discussed. Finally, the verification and experiment results for the stereoscopic panoramic camera show that the design methodology is feasible. © 2013 Copyright SPIE.

Number of references:7

Main heading:Thermography (imaging)

Controlled terms:Design - Field programmable gate arrays (FPGA) - Imaging systems - Space applications

Uncontrolled terms:Active Pixel Sensor - CMOS APS - Complementary metal oxide semiconductors - Fpga(field programmable gate array) - Lower-power consumption - Panoramic imaging - Stereo cameras - Three dimensional images

Classification code:408 Structural Design - 656 Space Flight - 721.3 Computer Circuits - 741 Light, Optics and Optical Devices - 742.1 Photography - 746 Imaging Techniques

DOI:10.1117/12.2034858

Database:Compendex

Accession number:20142717887166

Title:Single-step fabrication of stressed waveguides with tubular depressed-cladding in phosphate glasses using ultrafast vortex laser beams

Authors:Cheng, Guanghua (1); Long, Xuewen (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Source title:MATEC Web of Conferences

Abbreviated source title:MATEC Web Conf.

Volume:8

Monograph title:Progress in Ultrafast Laser Modifications of Materials

Issue date:2013

Publication year:2013

Article number:06008

Language:English

E-ISSN:2261236X

Document type:Conference article (CA)

Conference name:Workshop on Progress in Ultrafast Laser Modifications of Materials, 2013

Conference date:April 14, 2013 - April 19, 2013

Conference location:Cargese, France

Conference code:105880

Publisher:EDP Sciences

Abstract:We report on the fabrication of the stressed optical waveguide with tubular depressed-refractive-index cladding in phosphate glasses by use of femtosecond vortex beam. Strained regions were emerged in domains surrounding the tubular track. Waveguiding occurs mainly within the tube induced by femtosecond laser. © Owned by the authors, published by EDP Sciences, 2013.

Number of references:4

Main heading:Ultrafast lasers

Controlled terms:Glass - Refractive index - Vortex flow - Waveguides

Uncontrolled terms:Femtoseconds - Phosphate glass - Single-step - Tubular Track - Ultra-fast - Vortex beams - Vortex laser beams - Waveguiding

Classification code:631.1 Fluid Flow, General - 714.3 Waveguides - 741.1 Light/Optics - 744.1 Lasers, General - 812.3 Glass

DOI:10.1051/matecconf/20130806008

Database:Compendex

Accession number:20135217123255

Title:Vibration immunity fiber optic current sensor employing a spun or twisted highly linear birefringence fiber

Authors:Kang, Menghua (1); Wang, Yingli (1); Xu, Jintao (1); Ren, Kaili (1); Liu, Shangbo (1)

Source title:Chinese Control Conference, CCC

Abbreviated source title:Chinese Control Conf., CCC

Monograph title:Proceedings of the 32nd Chinese Control Conference, CCC 2013

Issue date:October 18, 2013

Publication year:2013

Pages:7468-7472

Article number:6640752

Language:English

ISSN:19341768

E-ISSN:21612927

ISBN-13:9789881563835

Document type:Conference article (CA)

Conference name:32nd Chinese Control Conference, CCC 2013

Conference date:July 26, 2013 - July 28, 2013

Conference location:Xi'an, China

Conference code:103692

Publisher:IEEE Computer Society, 2001 L Street N.W., Suite 700, Washington, DC 20036-4928, United States

Abstract:Fiber optic current sensors (FOCS) based on Faraday magneto-optical effect have plenty of privileges compared to the traditional current sensors. However, the residual linear birefringence and environmental vibration sensitive problem are the fatal drawback in Sagnac fiber optic current sensors. In this paper, a vibration immunity sensing loop with a function of passive fiber optic polarization control is proposed, which consist of a spun or twisted fiber with highly birefringence. A spun or twisted fiber possesses two crucial functions: Remove the residual linear birefringence and control polarization of light. It is used as a substitute for fiber-optic quarter wave plate, which is sensitive to temperature fluctuation. Use the special fiber to encircle a distinctive geometric configuration, eliminating the influence of vibration or the Sagnac effect undesired. It has been demonstrated that the novel fiber optic current sensor has high sensitivity, considerable wide dynamic range, resistance to electromagnetic interference, and immunity of vibration. © 2013 TCCT, CAA.

Number of references:12

Main heading:Spinning (fibers)

Controlled terms:Birefringence - Electric current measurement - Electromagnetic pulse - Fiber optic sensors - Fibers - Polarization

Uncontrolled terms:Circular birefringence - Fiber-optic current sensor - Nonreciprocal phase shift - Spun fiber - vibration immunity

Classification code:942.2 Electric Variables Measurements - 819.3 Fiber Chemistry and Processing - 817 Plastics and Other Polymers: Products and Applications - 812 Ceramics, Refractories and Glass - 741.1.2 Fiber Optics - 741.1 Light/Optics - 701 Electricity and Magnetism

Database:Compendex

Accession number:20140717300061

Title:Image jigsaw puzzles with a self-correcting solver

Authors:Zheng, Xiangtao (1); Lu, Xiaoqiang (1); Yuan, Yuan (1)

Author affiliation:(1) Center for OPTical IMagery Analysis and Learning (OPTIMAL), Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China; (2) Graduate University of the Chinese Academy of Science, Beijing 100049, China

Source title:Proceedings - 2013 International Conference on Virtual Reality and Visualization, ICVRV 2013

Abbreviated source title:Proc. - Int. Conf. Virtual Real. Vis., ICVRV

Monograph title:Proceedings - 2013 International Conference on Virtual Reality and Visualization, ICVRV 2013

Issue date:2013

Publication year:2013

Pages:112-118

Article number:6689405

Language:English

ISBN-13:9780769551500

Document type:Conference article (CA)

Conference name:2013 International Conference on Virtual Reality and Visualization, ICVRV 2013

Conference date:September 14, 2013 - September 15, 2013

Conference location:Xi'an, Shaanxi, China

Conference code:103893

Sponsor:China Computer Federation (CCF); VR and Visualization Committee of China Computer Federation; VR Committee of China Society of Image and Graphics; VR Committee of the China System Simulation Association

Publisher:IEEE Computer Society, 2001 L Street N.W., Suite 700, Washington, DC 20036-4928, United States

Abstract:Jigsaw puzzle is an intellectual game and serves as a platform for many scientific applications. Several computational methods have been proposed to deal with the jigsaw puzzle problem in recent years. However, there are still some drawbacks. First, these methods fail to consider the content consistency of the reconstructed images. Specially, the traditional measures only reflect similarity between adjoining pieces but neighboring pieces. Second, these methods cannot guarantee the overall reconstruction correctness, because the strategy of assembly merely tries to correct the measure of adjoining pieces at each step. To overcome these drawbacks, this paper proposes a new method which contributes the follows: 1) A new measure considers the transmission relationships of four neighboring pieces to make better use of content consistency. 2) A self-correcting mechanism avoids error accumulation of adjoining matrix and improves the overall accuracy of assembly, which is achieved through ordering the pairwise relations. Experimental results on 20 images demonstrate that the proposed method significantly improves the performance and outperforms the state-of-the-art methods. © 2013 IEEE.

Number of references:14

Main heading:Virtual reality

Controlled terms:Assembly - Visualization

Uncontrolled terms:Content consistency - Dissimilarity-based measure - Error accumulation - Jigsaw puzzles - Minimal spanning tree - Reconstructed image - Scientific applications - State-of-the-art methods

Classification code:723 Computer Software, Data Handling and Applications - 902.1 Engineering Graphics - 913.1 Production Engineering

DOI:10.1109/ICVRV.2013.26

Database:Compendex

Accession number:20140717299194

Title:Numerical analysis of large mode area segmented cladding fibers

Authors:Shao, Hongmin (1); Duan, Kailiang (1); Zhu, Yonggang (1); Yang, Hening (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Duan, K.(kl.duan@163.com)

Source title:Proceedings - 2013 Wireless and Optical Communications Conference, WOCC 2013

Abbreviated source title:Proc. - Wirel. Opt. Commun. Conf., WOCC

Monograph title:Proceedings - 2013 Wireless and Optical Communications Conference, WOCC 2013

Issue date:2013

Publication year:2013

Pages:491-494

Article number:6676417

Language:English

ISBN-13:9781467356992

Document type:Conference article (CA)

Conference name:22nd Wireless and Optical Communications Conference, WOCC 2013

Conference date:May 16, 2013 - May 18, 2013

Conference location:Chongqing, China

Conference code:102423

Publisher:IEEE Computer Society, 2001 L Street N.W., Suite 700, Washington, DC 20036-4928, United States

Abstract:We analyze numerically the dependence of segmented cladding fibers (SCF) characters, including the effective V-number, the effective fundamental mode area and the permissible bending radius of fundamental mode, on the structure parameters of the fiber and the signal wavelength with the methods of radial effective index and transmission matrix. The results show that a single mode and large mode area fiber with an acceptable permissible bending radius can be obtained when we design SCF with optimized structure parameters. The effective fundamental area is as large as 1948.93μm2 with proper fiber parameters. It will benefit the fabrication of the SCF for applications in high power fiber lasers. © 2013 IEEE.

Number of references:23

Main heading:Fibers

Controlled terms:Fiber lasers - High power lasers - Optical communication - Optical design

Uncontrolled terms:Effective mode areas - Fundamental modes - High power fiber lasers - Large mode area fiber - Optimized structures - SCF - Structure parameter - Transmission matrix

Classification code:817 Plastics and Other Polymers: Products and Applications - 812 Ceramics, Refractories and Glass - 744.4 Solid State Lasers - 744.1 Lasers, General - 741.1.2 Fiber Optics - 741.1 Light/Optics - 717.1 Optical Communication Systems

DOI:10.1109/WOCC.2013.6676417

Database:Compendex

Accession number:20132816496963

Title:An analog modulated simulation source for X-ray pulsar-based navigation

Authors:Zhou, Feng (1); Wu, Guang-Min (1); Zhao, Bao-Sheng (2); Sheng, Li-Zhi (2); Song, Juan (2); Liu, Yong-An (2); Yan, Qiu-Rong (2); Deng, Ning-Qin (2); Zhao, Jian-Jun (1)

Author affiliation:(1) Faculty of Science, Kunming University of Science and Technology, Kunming 650093, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (3) University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Zhao, J.-J.(598965297@qq.com)

Source title:Wuli Xuebao/Acta Physica Sinica

Abbreviated source title:Wuli Xuebao

Volume:62

Issue:11

Issue date:June 5, 2013

Publication year:2013

Article number:119701

Language:Chinese

ISSN:10003290

CODEN:WLHPAR

Document type:Journal article (JA)

Publisher:Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing, 100190, China

Abstract:In this paper a high resolution X-ray simulation source is proposed and designed to verify the navigation based on X-ray pulsar in the simulation experience system. The simulation source consists of an arbitrary signal generator and a grid controlled X-ray tube. According to the grid tube's characteristic curve, the data of the pulsar standard pulse template are converted. Then using the method of direct digital frequency synthesis, the converted data are synthesized to waveforms, called the analog modulated grid voltage. In the grid controlled X-ray tube, the grid voltage changes the number of electrons hitting on the target and controls the X-ray intensity. With an analog modulated pulse profile applied on the tube grid electrode, the tube will emit X-rays which will match photons' statistical distribution and simulate the X-ray pulsar profile extremely well. The properties of Crab pulsar simulation source are tested in X-ray pulsar navigation simulation experience system. The results of the test are as follows: Comparing the tested pulse profile with the standard pulsar profile, we have time correlation coefficient is 0.9774, and frequency correlation coefficient is 0.9853. The X-ray photon flux is 1.90 ph&middotcm2-&middots-1, the pulsed fraction is 76.15%, and the half-width half maximum is 1.879 ms. These results show that the X-ray simulation source has several merits, such as: strong ability to simulate the X-ray, low cost and simple operation. So it is an important means for the improvement of X-ray pulsar navigation. © 2013 Chinese Physical Society.

Number of references:14

Main heading:X rays

Controlled terms:Electromagnetic wave emission - Navigation - Photons - Tubes (components) - X ray tubes

Uncontrolled terms:Characteristic curve - Direct digital frequency synthesis - Frequency correlation - Number of electrons - Simulated source - Statistical distribution - X-ray photon fluxes - X-ray pulsars

Classification code:422.1 Strength of Building Materials : Test Equipment - 616.1 Heat Exchange Equipment and Components - 711 Electromagnetic Waves - 716.3 Radio Systems and Equipment - 741.1 Light/Optics - 932.1 High Energy Physics

DOI:10.7498/aps.62.119701

Database:Compendex

Accession number:20131816287588

Title:Precise spectrum reconstruction of the Fourier transforms imaging spectrometer based on polarization beam splitters

Authors:Ren, Wenyi (1); Zhang, Chunmin (1); Jia, Chenling (1); Mu, Tingkui (1); Li, Qiwei (1); Zhang, Lin (1)

Author affiliation:(1) School of Science, Xi'An Jiaotong University, Xi'an 710049, China; (2) MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter, Xi'An Jiaotong University, Xi'an 710049, China; (3) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science (CAS), Xi'an 710119, China

Corresponding author:Zhang, C.(zcm@mail.xjtu.edu.cn)

Source title:Optics Letters

Abbreviated source title:Opt. Lett.

Volume:38

Issue:8

Issue date:April 15, 2013

Publication year:2013

Pages:1295-1297

Language:English

ISSN:01469592

E-ISSN:15394794

CODEN:OPLEDP

Document type:Journal article (JA)

Publisher:Optical Society of America, 2010 Massachusetts Ave, NW, Washington, DC, DC 20036-1023, United States

Abstract:A method was proposed to precisely reconstruct the spectrum from the interferogram taken by the Fourier transform imaging spectrometer (FTIS) based on the polarization beam splitters. Taken the FTISs based on the Savart polariscope and Wollaston prism as examples, the distorted spectrums were corrected via the proposed method effectively. The feasibility of the method was verified via simulation. The distorted spectrum, recovered from the interferogram taken by the polarization imaging spectrometer developed by us, was corrected. © 2013 Optical Society of America.

Number of references:22

Main heading:Polarization

Controlled terms:Fourier transforms - Interferometry - Prisms - Ray tracing - Spectrometers

Uncontrolled terms:Fourier transform imaging spectrometers - Imaging spectrometers - Interferograms - Polarization beam splitters - Polarization imaging - Savart polariscope - Spectrum reconstruction - Wollaston prism

Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems - 921.3 Mathematical Transformations - 941.4 Optical Variables Measurements

DOI:10.1364/OL.38.001295

Database:Compendex

Accession number:20131716230381

Title:Far-field tunable nano-focusing based on metallic slits surrounded with nonlinear-variant widths and linear-variant depths of circular dielectric grating

Authors:Cao, Peng-Fei (1); Cheng, Ling (1); Zhang, Xiao-Ping (1); Lu, Wei-Ping (2); Kong, Wei-Jie (1); Liang, Xue-Wu (1)

Author affiliation:(1) School of Information Science and Engineering, Lanzhou University, Lanzhou 730000, China; (2) Department of Physics, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom; (3) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Zhang, X.-P.(zxp@lzu.edu.cn)

Source title:Progress in Electromagnetics Research

Abbreviated source title:Prog. Electromagn. Res.

Volume:138

Issue date:2013

Publication year:2013

Pages:647-660

Language:English

ISSN:10704698

E-ISSN:15598985

Document type:Journal article (JA)

Publisher:Electromagnetics Academy, 77 Massachusetts Avenue, Room 26-305, Cambridge, MA 02139, United States

Abstract:In this work, we present a new design of a tunable nanofocusing lens using a circular grating of linear-variant depths and nonlinear-variant widths. Constructive interference of cylindrical surface plasmon launched by the subwavelength metallic structure forms a subdiffraction-limited focus, the focal length can be adjusted by varying the geometry of each groove in the circular grating. According to the numerical calculation, the range of focusing points shift is much more than other plasmonic lens, and the relative phase of emitting light scattered by surface plasmon coupling circular grating can be modulated by the nonlinear-variant width and linear-variant depth. The simulation result indicates that the different relative phase of emitting light lead to variant focal length. We firstly show a unique phenomenon for the linear-variant depths and nonlinear-variant widths of the circular grating that the positive change and negative change of the depths and widths of grooves can result in different of variation trend between relative phases and focal lengths. These results paved the road for utilizing the plasmonic lens in high-density optical storage, nanolithography, superresolution optical microscopic imaging, optical trapping, and sensing.

Number of references:35

Main heading:Surface plasmon resonance

Controlled terms:Computer simulation - Microscopic examination - Plasmons

Uncontrolled terms:Constructive interference - Cylindrical surface - Dielectric grating - High-density optical storage - Metallic structures - Microscopic imaging - Numerical calculation - Surface plasmon coupling

Classification code:711 Electromagnetic Waves - 712.1 Semiconducting Materials - 723.5 Computer Applications - 746 Imaging Techniques

Database:Compendex

Accession number:20132916509411

Title:Theoretical and experimental research on ultrafast electron diffraction system

Authors:Wang, Xingchao (1); Tian, Jinshou (1); Liu, Hulin (1); Lu, Yu (1); Cao, Ziqiang (2)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) Education and Research Department of Xi'an Military Academy, Xi'an 710108, China; (3) University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Wang, X.(wangxingchao@opt.cn)

Source title:Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams

Abbreviated source title:Qiangjiguang Yu Lizishu

Volume:25

Issue:7

Issue date:July 2013

Publication year:2013

Pages:1630-1634

Language:Chinese

ISSN:10014322

CODEN:QYLIEL

Document type:Journal article (JA)

Publisher:Editorial Office of High Power Laser and Particle Beams, P.O. Box 919-805, Mianyang, 621900, China

Abstract:An ultrafast electron diffraction system with both ultrafast temporal resolution and ultrahigh spatial resolution was established. The temporal resolution of the system is 300 fs and spatial resolution 160 lp/mm in theory. Investigation and optimization on spatial resolution of the system was performed. The experimental results demonstrate that the system can provide an electron beam diameter less than 300 μm and an incidence angle less than 0.09°. The x-y deflection plates and stability of the electron beam were quantitatively analyzed. The diffraction pattern of Al was obtained by this system and it demonstrates that the system can distinguish diffraction peak position changes of 0.36%.

Number of references:15

Main heading:Image resolution

Controlled terms:Deflection (structures) - Electron beams - Electron diffraction - Electron guns - Structural design

Uncontrolled terms:Deflection sensitivities - Diffraction peaks - Incidence angles - Spatial resolution - Temporal resolution - Theoretical and experimental - Ultra-fast - Ultrafast electron diffraction

Classification code:932.2 Nuclear Physics - 932 High Energy Physics; Nuclear Physics; Plasma Physics - 742 Cameras and Photography - 741 Light, Optics and Optical Devices - 714.1 Electron Tubes - 421 Strength of Building Materials; Mechanical Properties - 408.1 Structural Design, General

DOI:10.3788/HPLPB20132507.1630

Database:Compendex

Accession number:20131516184595

Title:Chirp structure measurement of a supercontinuum pulse based on transient lens effect in tellurite glass

Authors:Zhang, Hang (1); Zhou, Zhiguang (2); Lin, Aoxiang (2); Cheng, Jun (1); Yan, Lihe (1); Si, Jinhai (1); Chen, Feng (1); Hou, Xun (1)

Author affiliation:(1) Key Laboratory for Physical Electronics and Devices, School of Electronic Information Engineering, Xi'An Jiaotong University, Xianning-xilu 28, Xi'an 710049, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi'an 710119, China

Corresponding author:Si, J.(jinhaisi@mail.xjtu.edu.cn)

Source title:Journal of Applied Physics

Abbreviated source title:J Appl Phys

Volume:113

Issue:11

Issue date:March 21, 2013

Publication year:2013

Article number:113106

Language:English

ISSN:00218979

CODEN:JAPIAU

Document type:Journal article (JA)

Publisher:American Institute of Physics, 2 Huntington Quadrangle, Suite N101, Melville, NY 11747-4502, United States

Abstract:We demonstrated the controllable acquisition of optical gated spectra from a chirped supercontinuum (SC) pulse based on ultrafast transient lens (TrL) effect. Comparing with CS<inf>2</inf>, the gated spectra had much narrower spectral bandwidths using tellurite glass (Te glass) as the nonlinear medium due to its ultrafast nonlinear response. Experimental results showed that the chirp structure of the SC pulse measured by TrL method was quite accordant with that measured by femtosecond optical Kerr gate method. © 2013 American Institute of Physics.

Number of references:26

Main heading:Lenses

Controlled terms:Glass - Tellurium compounds

Uncontrolled terms:Nonlinear medium - Optical Kerr gate - Spectral bandwidth - Structure measurement - Supercontinuum - Supercontinuum pulse - Tellurite glass - Ultrafast nonlinear response

Classification code:741.3 Optical Devices and Systems - 804.1 Organic Compounds - 812.3 Glass

DOI:10.1063/1.4795587

Database:Compendex

Accession number:20133816768754

Title:Face recognition using Weber local descriptors

Authors:Li, Shutao (1); Gong, Dayi (1); Yuan, Yuan (2)

Author affiliation:(1) College of Electrical and Information Engineering, Hunan University, Changsha 410082, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Yuan, Y.(yuany@opt.ac.cn)

Source title:Neurocomputing

Abbreviated source title:Neurocomputing

Volume:122

Issue date:December 25, 2013

Publication year:2013

Pages:272-283

Language:English

ISSN:09252312

E-ISSN:18728286

CODEN:NRCGEO

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:This paper presents a method for face recognition using multi-scale Weber local descriptors (WLDs) and multi-level information fusion. Our method introduces the WLD, a novel and robust local descriptor, to describe the facial images and modifies it by a non-linear quantization approach to enhance its discriminative power. Moreover, a multi-scale framework for WLD extraction with multi-level information fusion approaches is provided for face representation and recognition. The proposed method has four main steps: (1) image partition: under given rules, each facial image is uniformly divided into a set of non-overlapped sub-regions; in this way, for a set of facial images, we therefore have a large pool of this type of sub-regions; (2) feature extraction: in this pool of sub-regions, taking one sub-region as a center, a group of similar ones are chosen for extraction of WLD histogram features; (3) features measurement: these WLD histograms are then fused into a single vector - as the feature of the center sub-region. Nearest neighborhood on chi-square is employed for similarity measurement between two sub-regions; and (4) voting: the recognition result of the entire probe (a face in sub-regions) is obtained via a voting function on the recognition result of all its sub-regions. Experimental results demonstrate the effectiveness of the proposed method upon three popular datasets. © 2013 Elsevier B.V.

Number of references:45

Main heading:Face recognition

Controlled terms:Extraction - Feature extraction - Graphic methods - Information fusion - Lakes - Statistical methods

Uncontrolled terms:Discriminative power - Face representations - Histogram features - Multi-scale frameworks - Nearest neighborhood - Quantization approach - Similarity measurements - Weber local descriptors

Classification code:407 Maritime and Port Structures; Rivers and Other Waterways - 716 Telecommunication; Radar, Radio and Television - 802.3 Chemical Operations - 902.1 Engineering Graphics - 903.1 Information Sources and Analysis - 922.2 Mathematical Statistics

DOI:10.1016/j.neucom.2013.05.038

Database:Compendex

Accession number:20124615668521

Title:Adaptively post-encoding multiple description video coding

Authors:Lan, Xuguang (1); Yang, Meng (1); Yuan, Yuan (2); Zhao, Songlin (1); Zheng, Nanning (1)

Author affiliation:(1) Institute of Artificial Intelligence and Robotics, Xi'an Jiaotong University, Xi'An 710049, China; (2) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China

Corresponding author:Yuan, Y.(yuany@opt.ac.cn)

Source title:Neurocomputing

Abbreviated source title:Neurocomputing

Volume:101

Issue date:February 4, 2013

Publication year:2013

Pages:149-160

Language:English

ISSN:09252312

E-ISSN:18728286

CODEN:NRCGEO

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:In video coding and transmission, the network conditions are crucial, i.e., bandwidth, delay and other factors. However, how to effectively take these factors into account is still a challenge, as heterogeneous networks are dynamic, and therefore it is difficult to predict their changes. This paper first reports a post-encoding of Scalable Multiple Description Coding (SMDC), which is towards self-adaptive video delivery under different conditions of the network. The proposed scheme contains three major steps: (1) spatiotemporal wavelet transformation of input video sequence; (2) context-based adaptive binary arithmetic coding; and (3) rate allocation under the conditions of the network and analysis of the principle relationship of the rate-distortion slope ratio with packet-loss probability in network links. The performance of the SMDC is compared with that of scalable video coding and scalable H.264, and SMDC is demonstrated to effectively optimize the video delivery to adapt to the dynamics of heterogeneous networks. Part of this work has been published on Data Compression Conference 2009 as a short abstract version [37]. © 2012 Elsevier B.V.

Number of references:37

Main heading:Image coding

Controlled terms:Data compression - Encoding (symbols) - Heterogeneous networks - Video signal processing

Uncontrolled terms:Context-based adaptive binary arithmetic coding - Input videos - Lagrangian rate - Multiple description coding - Multiple description video coding - Network condition - Network links - Packet-loss probabilities - Post-encoding - Rate allocation - Rate-distortion slope - Scalable multiple description coding - Scalable video coding - Self-adaptive - Video coding and transmission - Video delivery - Wavelet coding - Wavelet transformations

Classification code:716 Telecommunication; Radar, Radio and Television - 716.4 Television Systems and Equipment - 717 Optical Communication - 722 Computer Systems and Equipment - 723 Computer Software, Data Handling and Applications - 723.2 Data Processing and Image Processing

DOI:10.1016/j.neucom.2012.08.015

Database:Compendex

Accession number:20133416646616

Title:Thermal crosstalk of high-power diode laser array

Authors:Zhang, Zhiyong (1); Zhang, Pu (1); Nie, Zhiqiang (1); Li, Xiaoning (1); Xiong, Lingling (1); Liu, Hui (1); Wang, Zhenfu (1); Liu, Xingsheng (1)

Corresponding author:Zhang, Z.(zhangzhiyong@opt.ac.cn)

Source title:Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams

Abbreviated source title:Qiangjiguang Yu Lizishu

Volume:25

Issue:8

Issue date:August 2013

Publication year:2013

Pages:1904-1910

Language:Chinese

ISSN:10014322

CODEN:QYLIEL

Document type:Journal article (JA)

Publisher:Editorial Office of High Power Laser and Particle Beams, P.O. Box 919-805, Mianyang, 621900, China

Abstract:A three-dimensional thermal model is established for a hard solder packaged, conduction-cooled diode laser array, which contains 19 emitters, its fill factor is 30%, and the width of emitting area is 150 μm. The thermal crosstalk among emitters in the diode laser array has been studied systematically. It is found that there is an obvious thermal crosstalk among the emitters in the diode laser array after the device is operated for more than 1.2 ms in continuous wave mode. While the sub-mount material changes from copper-tungsten alloy to copper-diamond composites, the thermal resistance of each emitter and the interactive thermal resistance among adjacent emitters in the diode laser array decrease obviously. It is shown that this package structure design can reduce the thermal crosstalk behavior of the emitters effectively. The effect of the emitter size and pitch on the thermal characteristics of device is analyzed while the output power of the device, the number of the emitters, the cycle of the emitters and the width of the diode laser array are kept constant. The results show that both the thermal resistance of device and the thermal resistance of each emitter decrease exponentially with the increasing of the fill factor of the diode laser array, but the thermal crosstalk characteristics among emitters are not sensitive to the emitter size and pitch. On the other hand, keeping the output power of each single emitter, the emitter size and pitch, and the width of diode laser array constant, the thermal crosstalk behavior of the emitters is heavily influenced by the number of the emitters in diode laser array. Specifically, the higher the fill factor is, the more quickly the temperature of diode laser array rises. But during the first 70 μs, the highest temperature difference among these devices containing different number of emitters is about 0.5°C, it is benefited to the high-power output of device having high fill factor in this period. This research is significant to the design of the structure of diode laser array, especially to the optimization of the fill factor, the emitter size and pitch of diode laser arrays. More importantly, it also presents necessary references for the package structure design of diode laser array.

Number of references:12

Main heading:Semiconductor lasers

Controlled terms:Copper - Crosstalk - Finite element method - Heat resistance - Lasers - Structural design

Uncontrolled terms:Continuous wave modes - Diode laser array - High-power diode laser arrays - Highest temperature - Package structure - Thermal characteristics - Thermal crosstalk - Three-dimensional thermal models

Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 921.6 Numerical Methods - 744.4.1 Semiconductor Lasers - 744.1 Lasers, General - 711.1 Electromagnetic Waves in Different Media - 544.1 Copper - 408.1 Structural Design, General

DOI:10.3788/HPLPB20132508.1904

Database:Compendex

Accession number:20134216860589

Title:Compressive sampling spectral modulated technique

Authors:Sun, Lang (1); Hu, Bing-Liang (1); Wang, Shuang (1); Yan, Peng (1); Feng, Yu-Tao (1); Sun, Nian (1)

Author affiliation:(1) Laboratory of Spectral Imaging Technique, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Hu, B.-L.(hbl@opt.ac.cn)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:42

Issue:8

Issue date:August 2013

Publication year:2013

Pages:912-915

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:The compressive sampling spectral modulated technique is developed in order to avoid time penalty and promote throughput of spectral imaging system, and a digital-micromirror-device based compressive sampling multispectral imaging system is designed. In the technique based compressive sampling spectral information is sampled below Nyquist-criterion with coded aperture to reduce spectral data greatly. In the experiment, the cubic spatial/spectral data cubes of the 612 nm laser and colored striped fabric are reconstructed from 2-Dimension images obtained from detector that contain spectral information using double shrinkage fast iterative algorithm. The results indicate that a digital-micromirror-device based compressive sampling multispectral imaging system has images with high-throughput and high resolution, can compress the spectral simultaneously, and the compression ratio can reach 31:1.

Number of references:17

Main heading:Imaging systems

Controlled terms:Algorithms - Iterative methods - Shrinkage - Spectroscopy

Uncontrolled terms:Coded apertures - Compressive sampling - High resolution - High-throughput - Iterative algorithm - Multi-spectral imaging systems - Spectral imaging system - Spectral information

Classification code:951 Materials Science - 921.6 Numerical Methods - 921 Mathematics - 801 Chemistry - 746 Imaging Techniques - 741 Light, Optics and Optical Devices - 723 Computer Software, Data Handling and Applications

DOI:10.3788/gzxb20134208.0912

Database:Compendex

Accession number:20132716474492

Title:Study of multiple quantum beats in atomic wavepackets

Authors:Zhu, Chang Jun (1); Xue, Bing (1); Zhai, Xue Jun (1); He, Jun Fang (2)

Source title:Applied Mechanics and Materials

Abbreviated source title:Appl. Mech. Mater.

Volume:327

Monograph title:Advanced Research on Materials, Applied Mechanics and Design Science

Issue date:2013

Publication year:2013

Pages:119-122

Language:English

ISSN:16609336

E-ISSN:16627482

ISBN-13:9783037857175

Document type:Conference article (CA)

Conference name:2nd International Conference on Intelligent Materials, Applied Mechanics and Design Science, IMAMD 2013

Conference date:April 13, 2013 - April 14, 2013

Conference location:Guangzhou, China

Conference code:97684

Sponsor:International Science and Education Researcher Association, China; Beijing Gireida Education Research Center; VIP-Information Conference Center, China

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Number of references:6

Main heading:Design

Controlled terms:Equations of motion - Four wave mixing - Impulse response - Wave packets

Classification code:408 Structural Design - 408.1 Structural Design, General - 711.1 Electromagnetic Waves in Different Media - 931.1 Mechanics - 931.4 Quantum Theory; Quantum Mechanics

DOI:10.4028/www.scientific.net/AMM.325-326.119

Database:Compendex

Accession number:20135017076804

Title:Data-dependent semi-supervised hyperspectral image classification

Authors:Lv, Haobo (1); Lu, Xiaoqiang (1); Yuan, Yuan (1)

Author affiliation:(1) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China; (2) Graduate University, Chinese Academy of Science, 19A Yuquanlu, Beijing, 100049, China

Source title:2013 IEEE China Summit and International Conference on Signal and Information Processing, ChinaSIP 2013 - Proceedings

Abbreviated source title:IEEE China Summit Int. Conf. Signal Inf. Process., ChinaSIP - Proc.

Monograph title:2013 IEEE China Summit and International Conference on Signal and Information Processing, ChinaSIP 2013 - Proceedings

Issue date:2013

Publication year:2013

Pages:664-668

Article number:6625425

Language:English

ISBN-13:9781479910434

Document type:Conference article (CA)

Conference name:2013 IEEE China Summit and International Conference on Signal and Information Processing, ChinaSIP 2013

Conference date:July 6, 2013 - July 10, 2013

Conference location:Beijing, China

Conference code:101067

Sponsor:The Institute of Electrical and Electronics Engineers Signal Processing Society (IEEE SPS)

Abstract:Hyperspectral imagery provides more powerful information than multispectral remote sensing data. However, when hyperspectral data is used for classification task, the highdimension features often lead to ill-conditioned problems, such as the Hughes phenomenon. To tackle this problem, various supervised dimensional reduction methods are proposed. However, these methods only exploit the labeled training data and ignore the huge unlabelled data. To utilize the unlabelled data space structure information in dimension reduction, a method is proposed as Data-dependent semi-supervised (DDSS). The proposed method exploits the space structure of labeled data and unlabelled data jointly to reduce the dimensionality of the image cures. Experimental results show that this method significantly outperforms the state-of-the-art dimension reduction methods for classification and denoising. © 2013 IEEE.

Number of references:10

Main heading:Data reduction

Controlled terms:Data processing - Image classification - Remote sensing - Space applications - Space platforms - Spectroscopy

Uncontrolled terms:Dimension reduction - Dimension reduction method - Euclidean embedding - Hyper-spectral imageries - Hyper-spectral images - Hyperspectral image classification - Multispectral remote sensing - Semi-supervised

Classification code:655.1 Spacecraft, General - 656 Space Flight - 716 Telecommunication; Radar, Radio and Television - 723.2 Data Processing and Image Processing - 731.1 Control Systems - 801 Chemistry

DOI:10.1109/ChinaSIP.2013.6625425

Database:Compendex

Accession number:20133516678833

Title:High-power widely-tunable Tm:fiber master oscillator power amplifier

Authors:Wang, Fei (1); Shen, Deyuan (1); Long, Jingyu (1); Wang, Yishan (1); Guo, Chengzheng (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi 710119, China

Corresponding author:Shen, D.(shendy@opt.ac.cn)

Source title:Zhongguo Jiguang/Chinese Journal of Lasers

Abbreviated source title:Zhongguo Jiguang

Volume:40

Issue:6

Issue date:June 2013

Publication year:2013

Article number:0602009

Language:Chinese

ISSN:02587025

CODEN:ZHJIDO

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:Tunable Tm:fiber lasers within a wavelength range around 2 m have numerous applications such as communications, lidar etc.. In this paper, a high power, widely-tunable Tm:fiber master oscillator power amplifier (MOPA) system is reported. The master oscillator is tunable over 160 nm (1921-2084 nm) by use of a diffraction grating, which is placed in the Littrow configuration to provide wavelength selective feedback. The MOPA laser is tunable over 140 nm (1936-2081 nm) and continuous-wave output power higher than 54 W is obtained over a tuning range of 100 nm from 1962 nm to 2066 nm, limited by the seed laser tuning range. The laser yields 77.4 W output power at 1981 nm, corresponding to a slope efficiency of 34.4%.

Number of references:24

Main heading:Optical phase conjugation

Controlled terms:Fiber lasers - Lasers

Uncontrolled terms:High-power - Littrow configuration - Master oscillator power amplifier systems - Master oscillator power amplifiers - Master oscillators - Slope efficiencies - Tunable Tm:fiber lasers - Wavelength-selective

Classification code:741.1.1 Nonlinear Optics - 741.1.2 Fiber Optics - 744.1 Lasers, General - 744.4 Solid State Lasers

DOI:10.3788/CJL201340.0602009

Database:Compendex

Accession number:20131116111757

Title:Stability-improved slow light in polarization-maintaining fiber based on polarization-managed stimulated Brillouin scattering

Authors:Ju, Haijuan (1); Ren, Liyong (1); Liang, Jian (1); Ma, Chengju (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Ju, H.

Source title:Journal of Optics (United Kingdom)

Abbreviated source title:J. Opt.

Volume:15

Issue:3

Issue date:March 2013

Publication year:2013

Article number:035404

Language:English

ISSN:20408978

E-ISSN:20408986

Document type:Journal article (JA)

Publisher:Institute of Physics Publishing, Temple Circus, Temple Way, Bristol, BS1 6BE, United Kingdom

Abstract:With the idea of controlling the polarizations of the pump and Stokes beams in an optical fiber, a simple scheme is presented for enhancing the stability of the stimulated Brillouin scattering (SBS) interaction and thus that of the SBS-based slow light. For this purpose, a special slow-light element is constructed by fusing a polarization-maintaining circulator (its fast axis being blocked) to each terminal of the polarization-maintaining fiber (PMF). This configuration ensures that the pump and Stokes beams always have identical polarization in the whole fiber during the SBS interaction. An experimental setup is established accordingly. The SBS gain feature and the slow-light performance are studied. A tunable time delay with a slope of 0.82 ns dB -1 is demonstrated for a Gaussian pulse with a width of 88.9 ns. The experimental results with and without polarization management are compared. It is found that such a polarization-managed scheme can improve both the stability of the Brillouin gain and that of the time delay of the Stokes pulse. Moreover, for the same pump power, the Brillouin gain is also enhanced. © 2013 IOP Publishing Ltd.

Number of references:27

Main heading:Polarization

Controlled terms:Chemical elements - Fibers - Light polarization - Polarization-maintaining fiber - Pumps - Slow light - Stimulated Brillouin scattering - Time delay

Uncontrolled terms:Brillouin gain - Fast axis - Gaussian pulse - Polarization maintaining - Polarization managements - polarization-management - Pump power - Simple schemes - Stimulated Brillouin Scattering (SBS) - Stokes beam - Stokes pulse - Tunable time delays

Classification code:812 Ceramics, Refractories and Glass - 804 Chemical Products Generally - 741.1.2 Fiber Optics - 817 Plastics and Other Polymers: Products and Applications - 741.1 Light/Optics - 713 Electronic Circuits - 618.2 Pumps - 731 Automatic Control Principles and Applications

DOI:10.1088/2040-8978/15/3/035404

Database:Compendex

Accession number:20132616449035

Title:Low-repetition rate, nanosecond, high-power pulse amplifier system based on Yb-doped rod-type fiber

Authors:Yu, Jia (1); Zhao, Wei (1); Wang, Yishan (1); Yang, Zhi (1); Gao, Cunxiao (1); Linquan, Niu (1); Zhang, Ting (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Yu, J.(wizardyujia@163.com)

Source title:Chinese Optics Letters

Abbreviated source title:Chin. Opt. Lett.

Volume:11

Issue:5

Issue date:May 2013

Publication year:2013

Article number:050601

Language:English

ISSN:16717694

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:We report a nanosecond-pulse amplification system based on an Yb-doped, 100-μm core, rod-type photonic crystal fiber. Up to 10W of average power with pulse energy of 1 mJ and peak power of 450 kWis obtained at the repetition rate of 10 kHz. The high-power nanosecond pulse has a good pulse shape and spectral characteristics. The usage of rod-type fibers provides a novel structure for nanosecond pulse amplification. © 2013 Chinese Optics Letters.

Number of references:16

Main heading:Pulse amplifiers

Controlled terms:Photonic crystal fibers - Ytterbium

Uncontrolled terms:High-power nanosecond pulse - High-power pulse - Nanosecond pulse amplification - Novel structures - Pulse energies - Repetition rate - Rod-type fibers - Spectral characteristics

Classification code:547.2 Rare Earth Metals - 713.1 Amplifiers - 951 Materials Science

DOI:10.3788/COL201311.050601

Database:Compendex

Accession number:20134717001741

Title:Mid-infrared fluorotellurite glasses and fibers

Authors:Zhan, Huan (1); Zhang, Aidong (1); He, Jianli (1); Zhou, Zhiguang (1); Li, Lu (1); Lin, Aoxiang (1)

Corresponding author:Lin, A.(aoxiang@opt.ac.cn)

Source title:CLEO: Applications and Technology, CLEO_AT 2013

Abbreviated source title:Appl. Technol.

Monograph title:Conference on Lasers and Electro Optics, CLEO: Applications and Technology, CLEO_AT 2013

Issue date:2013

Publication year:2013

Pages:JTu4A.11

Language:English

ISBN-13:9781557529725

Document type:Conference article (CA)

Conference name:CLEO: Applications and Technology, CLEO_AT 2013

Conference date:June 9, 2013 - June 14, 2013

Conference location:San Jose, CA, United states

Conference code:100547

Publisher:Optical Society of American (OSA), 2010 Massachusetts Ave, NW, Washington, DC, DC 20036, United States

Abstract:Abstract: We report on the fabrication and characterization of rare earth ions-doped water-free fluorotellurite glasses and fibers. For 2.8 mm glass fiber rods, its background loss was ~12 dB/m in the range of 2.5~4.2 μm. © OSA 2013.

Number of references:5

Main heading:Laser applications

Controlled terms:Glass - Metal ions

Uncontrolled terms:Background loss - Fabrication and characterizations - Fluoro-tellurite glass - Midinfrared

Classification code:533 Ore Treatment and Metal Refining - 744.9 Laser Applications - 812.3 Glass

Database:Compendex

Accession number:20134116828728

Title:A new system of high-precision absolute laser interferometer distance measurement

Authors:Zhang, Chen-yang (1); Li, Bing (2)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an, 710119, China; (2) Chinese Academy of Sciences Beijing, 10039, China

Source title:Applied Mechanics and Materials

Abbreviated source title:Appl. Mech. Mater.

Volume:380-384

Monograph title:Vehicle, Mechatronics and Information Technologies

Issue date:2013

Publication year:2013

Pages:769-772

Language:English

ISSN:16609336

E-ISSN:16627482

ISBN-13:9783037858202

Document type:Conference article (CA)

Conference name:2013 International Conference on Vehicle and Mechanical Engineering and Information Technology, VMEIT 2013

Conference date:August 17, 2013 - August 18, 2013

Conference location:Zhengzhou, Henan, China

Conference code:99783

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:With the improvement of precision in various fields, we present a new method for the measurement of the absolute distance of a remote target based on the laser interferometry technique. In this paper, we obtain the interference fringes change information (the distance information) with the help of laser scanning with different frequency. It does not require the target to move in the direction of measurement. We have done experiments to compare this new method's results with the results of RENISHAW interferometer. It's improved that the accuracy of distance measurement is 10-4~10-5 relatively. © (2013) Trans Tech Publications, Switzerland.

Number of references:6

Main heading:Interferometers

Controlled terms:Distance measurement - Information technology - Laser interferometry - Measurements

Uncontrolled terms:Absolute distance - Different frequency - Distance information - High-precision - Interference fringe - Interferometry technique - Laser interferometer - Laser scanning

Classification code:903 Information Science - 941 Acoustical and Optical Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 943.2 Mechanical Variables Measurements - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments

DOI:10.4028/www.scientific.net/AMM.380-384.769

Database:Compendex

Accession number:20124915769362

Title:Rainbow trapping of surface plasmon polariton waves in metal-insulator- metal graded grating waveguide

Authors:Zeng, Chao (1); Cui, Yudong (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Zeng, C.(zengchao@opt.cn)

Source title:Optics Communications

Abbreviated source title:Opt Commun

Volume:290

Issue date:March 1, 2013

Publication year:2013

Pages:188-191

Language:English

ISSN:00304018

CODEN:OPCOB8

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:A new metal-insulator-metal (MIM) graded grating waveguide, based on surface plasmon polaritons (SPPs), is proposed and numerically investigated to realize the rainbow trapping of SPP waves. We find that the localized positions of SPP waves depend on the frequencies of the incident light. The theoretical results show that the trapping time of SPP waves can be up to 83.4 fs and the proposed compact configuration can be operated in a broad bandwidth of 90 THz. Our MIM graded grating waveguide may find significant applications on plasmonic slow-light systems, especially chip-based optical buffers and spectrometers. © 2012 Elsevier B.V. All rights reserved.

Number of references:50

Main heading:MIM devices

Controlled terms:Electromagnetic wave polarization - Finite difference time domain method - Particle optics - Plasmons - Surface plasmon resonance - Terahertz waves - Waveguides

Uncontrolled terms:Broad bandwidths - Finite difference time domains - Grating waveguides - Incident light - Localized positions - Metal insulator metals - Metal insulators - Optical buffer - Photonic integrated circuits - Plasmonic - Surface plasmon polaritons - Theoretical result - Trapping time

Classification code:701.1 Electricity: Basic Concepts and Phenomena - 711 Electromagnetic Waves - 712.1 Semiconducting Materials - 714.2 Semiconductor Devices and Integrated Circuits - 714.3 Waveguides - 921 Mathematics

DOI:10.1016/j.optcom.2012.10.020

Database:Compendex

Accession number:20135117093551

Title:The accuracy analysis of the intersection measurement on the moving ships

Authors:Wang, Miao (1); Shan, Qiu-Sha (1); Liu, Kai (1)

Author affiliation:(1) Photoelectric Measurement and Control Technology Research Department, Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an 710119, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8916

Monograph title:Sixth International Symposium on Precision Mechanical Measurements

Issue date:2013

Publication year:2013

Article number:891643

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497925

Document type:Conference article (CA)

Conference name:6th International Symposium on Precision Mechanical Measurements

Conference date:August 8, 2013 - August 12, 2013

Conference location:Guiyang, China

Conference code:101242

Sponsor:International Committee on Measurements and; Instrumentation (ICMI); National Natural Science Foundation of China (NSFC); China Instrument and Control Society (CIS)

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:Based on the princip le of the intersection measurement, the mathematical model of measuring the position and dimension of the moving ships was established, and the formu la of the metrical accuracy was deduced. The Matlab software was utilized to simu late and emulate the metrical accuracy, and analysed the primary errors of the system measurement accuracy; the measurement model is validated, co mbined with the examination. The result indicated that the method is feasible which utilized the measurement principle to measure the position and dimension of the moving ships, and establish the basical for further project application. © 2013 SPIE.

Number of references:2

Main heading:Measurement errors

Controlled terms:Mathematical models - MATLAB - Mechanical variables measurement - Position measurement - Ships

Uncontrolled terms:Accuracy analysis - Dimension measurements - Intersection measurement - Measurement model - Metrical accuracy - Simulate and emulate

Classification code:671 Naval Architecture - 672 Naval Vessels - 674 Small Craft and Other Marine Craft - 921 Mathematics - 922 Statistical Methods - 943.2 Mechanical Variables Measurements

DOI:10.1117/12.2035540

Database:Compendex

Accession number:20133216579103

Title:Fast and accurate matrix completion via truncated nuclear norm regularization

Authors:Hu, Yao (1); Zhang, Debing (1); Ye, Jieping (2); Li, Xuelong (3); He, Xiaofei (1)

Author affiliation:(1) State Key Lab of CAD and CG, College of Computer Science, Zhejiang University, 388 Yu Hang Tang Road, Hangzhou, Zhejiang 310058, China; (2) Computer Science and Engineering Department and Center for Evolutionary Medicine and Informatics, Biodesign Institute, Arizona State University, Tempe, AZ 85287, United States; (3) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transicent Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Xi'an 710119, Shaanxi, China

Source title:IEEE Transactions on Pattern Analysis and Machine Intelligence

Abbreviated source title:IEEE Trans Pattern Anal Mach Intell

Volume:35

Issue:9

Issue date:2013

Publication year:2013

Pages:2117-2130

Article number:6389682

Language:English

ISSN:01628828

CODEN:ITPIDJ

Document type:Journal article (JA)

Publisher:IEEE Computer Society, 2001 L Street N.W., Suite 700, Washington, DC 20036-4928, United States

Abstract:Recovering a large matrix from a small subset of its entries is a challenging problem arising in many real applications, such as image inpainting and recommender systems. Many existing approaches formulate this problem as a general low-rank matrix approximation problem. Since the rank operator is nonconvex and discontinuous, most of the recent theoretical studies use the nuclear norm as a convex relaxation. One major limitation of the existing approaches based on nuclear norm minimization is that all the singular values are simultaneously minimized, and thus the rank may not be well approximated in practice. In this paper, we propose to achieve a better approximation to the rank of matrix by truncated nuclear norm, which is given by the nuclear norm subtracted by the sum of the largest few singular values. In addition, we develop a novel matrix completion algorithm by minimizing the Truncated Nuclear Norm. We further develop three efficient iterative procedures, TNNR-ADMM, TNNR-APGL, and TNNR-ADMMAP, to solve the optimization problem. TNNR-ADMM utilizes the alternating direction method of multipliers (ADMM), while TNNR-AGPL applies the accelerated proximal gradient line search method (APGL) for the final optimization. For TNNR-ADMMAP, we make use of an adaptive penalty according to a novel update rule for ADMM to achieve a faster convergence rate. Our empirical study shows encouraging results of the proposed algorithms in comparison to the state-of-the-art matrix completion algorithms on both synthetic and real visual datasets. © 1979-2012 IEEE.

Number of references:48

Main heading:Problem solving

Controlled terms:Algorithms - Gradient methods - Optimization - Relaxation processes

Uncontrolled terms:Accelerated proximal gradient methods - Alternating direction method of multipliers - Faster convergence - Low-rank matrix approximations - Matrix completion - Nuclear norm minimizations - Nuclear norm regularizations - Optimization problems

Classification code:723 Computer Software, Data Handling and Applications - 921 Mathematics - 931.1 Mechanics

DOI:10.1109/TPAMI.2012.271

Database:Compendex

Accession number:20134216857643

Title:Resolution performance of the extra ultraviolet telescopes

Authors:Fu, Huai-Yang (1); Zhou, Si-Zhong (1); Jiang, Kai (1); Mei, Chao (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, China Academy of Sciences, Xi'an 710119, China; (2) Graduate University, Chinese Academy of Sciences, Beijing 100039, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8908

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Sensors and Applications

Issue date:2013

Publication year:2013

Article number:89080H

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497772

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:The Extreme Ultraviolet Telescopes (EUT) Operates at wavelengths between 100-1000 A&ring;. As an important parameter of the telescope system, before the launch, angular resolution is necessary to be calibrated for testing the imaging performance of EUT. However, the difficulty and expense of fabricating optical testing systems capable of imaging the characteristic EUV wavelengths, has precluded in working wavelength resolution testing. This article taken a Ritchey-Chre´tien normal incidence optical system as sample and resolution tests were carried out at visible wavelength. Based on this measurement, the angular resolution error budget at visible wavelength was calculated. At working wavelength, we added the squares of the pointing jitter error, the resolution focusing error and the scattering error, to the theoretical Rayleigh diffraction limit at the wavelength of operation, and then take the square root of this sum, an upper limit estimate of telescope's resolution was obtained about 0.4705 arcsec. This result proved that the EUT worked at diffraction-limited level and the resolution performance has met the demand of design. © 2013 SPIE.

Number of references:8

Main heading:Wavelength

Controlled terms:Budget control - Equipment testing - Optical systems - Telescopes

Uncontrolled terms:Diffraction limited - Error budgets - Extreme ultraviolet telescopes - Imaging performance - Optical testing system - Rayleigh diffraction limit - Ultraviolet telescopes - Wavelength resolution

Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 911 Cost and Value Engineering; Industrial Economics - 741.3 Optical Devices and Systems - 711 Electromagnetic Waves

DOI:10.1117/12.2032376

Database:Compendex

Accession number:20131916319670

Title:Design of the microlens arrays coupling with imaging fiber bundle

Authors:Yan, Xing-tao (1); Yang, Jian-feng (1); Xue, Bin (1); Ma, Xiao-long (1); Li, Fu (1); Zhao, Yi-yi (1); Bu, Fan (1)

Corresponding author:Yan, X.(xingtao.yan@163.com)

Source title:Optoelectronics Letters

Abbreviated source title:Optoelectron. Lett.

Volume:9

Issue:3

Issue date:2013

Publication year:2013

Pages:169-172

Language:English

ISSN:16731905

Document type:Journal article (JA)

Publisher:Springer Verlag, Tiergartenstrasse 17, Heidelberg, D-69121, Germany

Abstract:To ameliorate the disadvantages of imaging system coupled with imaging fiber bundle, a method by adding square aperture microlens arrays at both entrance and exit ends of the imaging fiber bundle is proposed to increase the system's coupling efficiency. The expressions for solving the parameters of both ends' microlens units are deducted particularly. The microlens arrays used for an infrared imaging fiber bundle with the single fiber diameter of 100 μm and core diameter of 70 μm are designed by this method. The simulation results show that compared with the system without microlens arrays, the fill factor of the imaging fiber bundle coupled microlens arrays system is increased from 44. 4% to more than 90%, and the coupling efficiency is doubled too. So the design method is correct, and the introduction of microlens arrays into imaging fiber bundle coupled system is feasible and superior. © 2013 Tianjin University of Technology and Springer-Verlag Berlin Heidelberg.

Number of references:14

Main heading:Fibers

Controlled terms:Infrared imaging - Microoptics - Optical instrument lenses

Uncontrolled terms:Core diameters - Coupled systems - Coupling efficiency - Design method - Imaging fiber bundle - Micro-lens arrays - Single fiber - Square apertures

Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems - 746 Imaging Techniques - 812 Ceramics, Refractories and Glass - 817 Plastics and Other Polymers: Products and Applications

DOI:10.1007/s11801-013-3016-4

Database:Compendex

Accession number:20133416646439

Title:Next generation of space wireless communication technology based on X-ray

Authors:Zhao, Bao-Sheng (1); Wu, Chuan-Xing (1); Sheng, Li-Zhi (1); Liu, Yong-An (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Zhao, B.-S.(open@opt.ac.cn)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:42

Issue:7

Issue date:July 2013

Publication year:2013

Pages:801-804

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:In the field of space wireless communication, laser and microwave technology have become mature, but bottleneck problems such as the limited transmission distance, the limited communication rate and so on already exist, which restrict the future applications in deep space. As a result of its short wavelength and great penetrability, X-ray has no attenuation for transmission in space when its photon energy is more than 10 keV (λ<0.1 nm). Thus, via X-ray, a communication technology of long distance signal transmission in space can be achieved with smaller volume, lower weight and lower power. However, studies on X-ray communication and its applications still remain blank in China presently. X-ray communication was proposed and defined as a "revolutionary concept" by National Aeronautics and Space Administration of USA just a short time ago. Thus, the study on this novel space communication method with a new conception by using X-ray as information carrier will have a great scientific significance and applicable prospect. X-ray communication technology will not only be a good complement to laser and microwave communications, but will also have a unique performance on those occasions where laser and microwave could have been shielded. Study on space wireless communication technology based on X-ray will include: the theoretical research on X-ray space transmission; the research on a high power and wide bandwidth(GHz) modulated X-ray source for pulse signal; the research on high speed, week signal of X-ray detection technology; the research on acquisition, tracking and pointing technology of X-ray space communication; the research on high efficient coding theory and technology.

Number of references:18

Main heading:X rays

Controlled terms:Communication systems - Computer programming - Microwave devices - NASA - Research - Wireless telecommunication systems

Uncontrolled terms:Communication technologies - Deep-space exploration - Limited communication - Microwave communications - Tracking and pointing - Transmission distances - Wireless communication technology - Wireless communications

Classification code:901.3 Engineering Research - 723.1 Computer Programming - 716 Telecommunication; Radar, Radio and Television - 932.1 High Energy Physics - 715 Electronic Equipment, General Purpose and Industrial - 656 Space Flight - 655 Spacecraft - 714 Electronic Components and Tubes

DOI:10.3788/gzxb20134207.0801

Database:Compendex

Accession number:20134316877170

Title:Synthesis and strong near-infrared fluorescence of LiLa <inf>1-x</inf>Nd<inf>x</inf>(PO<inf>3</inf>)<inf>4</inf> nanocrystals with high doping concentrations

Authors:Wang, Zhongyue (1); Cui, Xiaoxia (3); Zheng, Ruilin (2); Duan, Weikuan (1); Peng, Bo (1); Wei, Wei (2)

Author affiliation:(1) Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210046, China; (2) School of Optoelectronic Engineering, Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210046, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science (CAS), Xi'an 710119, China

Corresponding author:Cui, X.(cuixx2008@163.com)

Source title:Nanoscale

Abbreviated source title:Nanoscale

Volume:5

Issue:21

Issue date:November 7, 2013

Publication year:2013

Pages:10203-10206

Language:English

ISSN:20403364

E-ISSN:20403372

Document type:Journal article (JA)

Publisher:Royal Society of Chemistry, Milton Road, Cambridge, CB4 OWF, United Kingdom

Abstract:A series of LiLa<inf>1-x</inf>Nd<inf>x</inf>(PO<inf>3</inf>)<inf>4</inf> (LLNP) nanocrystals are synthesized by a combustion method for the first time. With irregular short-rod shapes and an average size of about 70 nm, the LiLa<inf>1-x</inf>Nd<inf>x</inf>(PO<inf>3</inf>)<inf>4</inf> nanocrystals exhibit stronger fluorescence emission of 1.8-6.5 times in the doping concentration range of 1 mol% to 100 mol% than Nd3+ (2.5 wt%) doped phosphate glass, and have a long lifetime of 122 μs for the fully doped nanocrystals. Moreover, the LiLa<inf>1-x</inf>Nd<inf>x</inf>(PO <inf>3</inf>)<inf>4</inf> nanocrystals show the lowest lifetime decay rate of 5.09 μs per mol% and a quenching ratio of 10.81%. Considering the above outstanding performances, LiLa<inf>1-x</inf>Nd<inf>x</inf>(PO<inf>3</inf>) <inf>4</inf> nanocrystals may have promising applications in optical amplifiers and lasers. © 2013 The Royal Society of Chemistry.

Number of references:19

Main heading:Nanocrystals

Controlled terms:Decay (organic) - Fluorescence - Light amplifiers

Uncontrolled terms:Average size - Combustion method - Doped nanocrystals - Doping concentration - Fluorescence emission - Long lifetime - Near-infrared fluorescence - Phosphate glass

Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems - 761 Nanotechnology - 811.2 Wood and Wood Products

DOI:10.1039/c3nr03367h

Database:Compendex

Accession number:20135117094996

Title:Joint optimization toward effective and efficient image search

Authors:Wei, Shikui (1); Xu, Dong (2); Li, Xuelong (3); Zhao, Yao (4)

Author affiliation:(1) Institute of Information Science, Beijing Jiaotong University, Beijing Key Laboratory of Advanced Information Science and Network Technology, Beijing 100044, China; (2) School of Computer Engineering, Nanyang Technological University, 639798, Singapore, Singapore; (3) Center for OPTical IMagery Analysis and Learning, State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Xi'an 710119, China; (4) Institute of Information Science, Beijing Jiaotong University, Beijing 100044, China; (5) State Key Laboratory of Rail Traffic Control and Safety, Beijing 100044, China

Source title:IEEE Transactions on Cybernetics

Abbreviated source title:IEEE Trans. Cybern.

Volume:43

Issue:6

Issue date:December 2013

Publication year:2013

Pages:2216-2227

Article number:6488799

Language:English

ISSN:21682267

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., 445 Hoes Lane / P.O. Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:The bag-of-words (BoW) model has been known as an effective method for large-scale image search and indexing. Recent work shows that the performance of the model can be further improved by using the embedding method. While different variants of the BoW model and embedding method have been developed, less effort has been made to discover their underlying working mechanism. In this paper, we systematically investigate the image search performance variation with respect to a few factors of the BoW model, and study how to employ the embedding method to further improve the image search performance. Subsequently, we summarize several observations based on the experiments on descriptor matching. To validate these observations in a real image search, we propose an effective and efficient image search scheme, in which the BoW model and embedding method are jointly optimized in terms of effectiveness and efficiency by following these observations. Our comprehensive experiments demonstrate that it is beneficial to employ these observations to develop an image search algorithm, and the proposed image search scheme outperforms state-of-the-art methods in both effectiveness and efficiency. © 2013 IEEE.

Number of references:33

Main heading:Search engines

Controlled terms:Efficiency - Experiments - Information retrieval - Optimization

Uncontrolled terms:Bag of words - Descriptor matching - Effectiveness and efficiencies - Embedding method - High effectiveness - Image search - Image search algorithms - State-of-the-art methods

Classification code:723 Computer Software, Data Handling and Applications - 723.5 Computer Applications - 901.3 Engineering Research - 913.1 Production Engineering - 921.5 Optimization Techniques

DOI:10.1109/TCYB.2013.2245890

Database:Compendex

Accession number:20132516432311

Title:The damage property of oxyfluoride glasses irradiated by a 351 nm high fluence laser

Authors:Hou, Chaoqi (1); Li, Weinan (1); Wang, Pengfei (1); Guo, Haitao (1); Gao, Fei (1); Cui, Xiaoxia (1); Lu, Min (1); Peng, Bo (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science (CAS), Xi'an 710119, China; (2) Graduate College of Chinese Academy of Science, Beijing 100049, China

Source title:Laser Physics

Abbreviated source title:Laser Phys.

Volume:23

Issue:7

Issue date:July 2013

Publication year:2013

Article number:076005

Language:English

ISSN:1054660X

E-ISSN:15556611

Document type:Journal article (JA)

Publisher:Institute of Physics Publishing, Temple Circus, Temple Way, Bristol, BS1 6BE, United Kingdom

Abstract:The laser induced damage property of oxyfluoride glasses irradiated by a 351 nm laser has been investigated. Two kinds of oxyfluoride glass (oxyfluoride1 and oxyfluoride2) have been prepared by different preparation technologies and their LIDTs (laser induced damage thresholds) are 9.0 J cm-2 and 13.6 J cm-2 respectively. It is found that the variation of LIDT in oxyfluoride glasses is associated with photoluminescence originated structural defects. Decrease of the photoluminescence intensity in an oxyfluoride glass could improve the LIDT of the material. Meanwhile, an experiment on damage growth has been presented, and the damage growth of oxyfluoride glasses develops in the longitudinal direction of laser propagation, which causes the transmittance loss to be limited once the damage growth occurs. Moreover, the damage growth stops when the laser fluence is below 70% of the LIDT. © 2013 Astro Ltd.

Number of references:19

Main heading:Laser damage

Controlled terms:Glass - Photoluminescence

Uncontrolled terms:Damage properties - Laser induced damage thresholds - Laser propagation - Longitudinal direction - Oxy-fluoride glass - Photoluminescence intensities - Preparation technology - Structural defect

Classification code:461.2 Biological Materials and Tissue Engineering - 741.1 Light/Optics - 812.3 Glass

DOI:10.1088/1054-660X/23/7/076005

Database:Compendex

Accession number:20132116362334

Title:Method of first-order ghost-image analysis in imaging system based on Code V and Tracepro

Authors:Mei, Chao (1); Zhou, Sizhong (1); Zhang, Hengjin (1); Duan, Jing (1); Jiang, Kai (1)

Corresponding author:Mei, C.(s09026@opt.cn)

Source title:Guangxue Xuebao/Acta Optica Sinica

Abbreviated source title:Guangxue Xuebao

Volume:33

Issue:4

Issue date:April 2013

Publication year:2013

Article number:0411003

Language:Chinese

ISSN:02532239

CODEN:GUXUDC

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:During optical designing, ghost images of optical system should be avoided, so fast and precise analysis of ghost images appears to be very important. The way of first-order ghost-image analysis of imaging system based on Code V and Tracepro is proposed. The surfaces which can cause serious ghost image are found out. The optical system model is established in Tracepro. The image is separated into several parts. Different parts are setted as different spot sources, then, the spot sources are analyzed one by one. During analysis, the order of the ghost is controlled by threshold and ghost-surface is controlled by the surface property. Through analysis, the position of ghost image, and power distribution of ghost image can be obtained.

Number of references:11

Main heading:Optical systems

Controlled terms:Headlights - Image analysis - Imaging systems - Imaging techniques - Optical design - Optical variables measurement - Surface properties

Uncontrolled terms:Energy distributions - First-order - Ghost image - Power distributions - Precise analysis - Simulation - Spot sources - TracePro

Classification code:707.2 Electric Lamps - 741 Light, Optics and Optical Devices - 746 Imaging Techniques - 941.4 Optical Variables Measurements - 951 Materials Science

DOI:10.3788/AOS201333.0411003

Database:Compendex

Accession number:20133216576183

Title:Pulse contrast measurement of femtosecond lasers using chalcohalide glass

Authors:Wu, Dengke (1); He, Junfang (1); Guo, Haitao (1); Zhu, Changjun (2); Wang, Yishan (1); Zhao, Wei (1)

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8796

Monograph title:2nd International Symposium on Laser Interaction with Matter, LIMIS 2012

Issue date:2013

Publication year:2013

Article number:87962F

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819496393

Document type:Conference article (CA)

Conference name:2nd International Symposium on Laser Interaction with Matter, LIMIS 2012

Conference date:September 9, 2012 - September 12, 2012

Conference location:Xi'an, Shaanxi, China

Conference code:97999

Sponsor:Northwest Institute of Nuclear Technology; Mechanics and Physics; Chinese Optical Society; European Laser Institute; The Optical Society

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:A chalcogenide glass was used for an optical Kerr gate to sampling pulse contrast of femtosecond lasers with low repetition rate ( 40 Hz). The dynamic range of this method reached 103, with a scanning range of 150ps and temporal sampling rate of 6.3 fs. The advantage of this method lies in its broad spectrum range including visible and NIR spectral region and easy operation. © 2013 SPIE.

Number of references:24

Main heading:Glass

Controlled terms:Laser tissue interaction - Nonlinear optics - Plasma interactions - Ultrashort pulses

Uncontrolled terms:Broad spectrum - Chalcogenide glass - Chalcohalide glass - Contrast measurements - Low repetition rate - Optical Kerr gate - Spectral region - Temporal sampling

Classification code:741.1.1 Nonlinear Optics - 744.1 Lasers, General - 744.8 Laser Beam Interactions - 812.3 Glass - 932.3 Plasma Physics

DOI:10.1117/12.2011984

Database:Compendex

Accession number:20135017087314

Title:A novel color constancy algorithm based on gray-curve regulation

Authors:Guo, Huinan (1); Zhou, Zuofeng (1); Tang, Yao (1); Cao, Jianzhong (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an 710119, China

Corresponding author:Zhou, Z.

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8878

Monograph title:Fifth International Conference on Digital Image Processing, ICDIP 2013

Issue date:2013

Publication year:2013

Article number:88784F

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819493057

Document type:Conference article (CA)

Conference name:5th International Conference on Digital Image Processing, ICDIP 2013

Conference date:April 21, 2013 - April 22, 2013

Conference location:Beijing, China

Conference code:101262

Sponsor:Chinese Academy of Sciences

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:Color constancy performs an important role in computer vision and digital color image processing. The traditional color regulation algorithms which are based on the gray world assumption neglect the correlation between the three stimulus color components and the nonlinear effect between the different gray levels. In this paper, we propose a novel color constancy algorithm which is based on gray-curve regulation. The proposed algorithm first divides the luminance interval into several parts and then regulates the gray-curves of RGB three channels in each subinterval which can solve the correlation and nonlinear problems simultaneously. The experiment results show the effectiveness of the proposed algorithm. © 2013 SPIE.

Number of references:9

Main heading:Color computer graphics

Controlled terms:Algorithms - Color - Image processing

Uncontrolled terms:Color channels - Color constancy - Color temperatures - Gray world assumption - gray-curve - Nonlinear effect - Nonlinear problems - Regulation algorithms

Classification code:723 Computer Software, Data Handling and Applications - 723.5 Computer Applications - 741 Light, Optics and Optical Devices - 741.1 Light/Optics - 921 Mathematics

DOI:10.1117/12.2030932

Database:Compendex

Accession number:20134416938014

Title:Image denoising algorithm via spatially adaptive bilateral filtering

Authors:Qi, Min (1); Zhou, Zuo Feng (2); Liu, Jing (3); Cao, Jian Zhong (2); Wang, Hao (2); Yan, A Qi (2); Wu, Deng Shan (2); Zhang, Hui (2); Tang, Li Nao (3)

Author affiliation:(1) The 63870 Unit of People's Liberation Army, Weinan 714200, China; (2) Xi'an Institutes of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (3) Huawei Technologies Co. Ltd, Shenzhen 518129, China

Source title:Advanced Materials Research

Abbreviated source title:Adv. Mater. Res.

Volume:760-762

Monograph title:Optoelectronics Engineering and Information Technologies in Industry

Issue date:2013

Publication year:2013

Pages:1515-1518

Language:English

ISSN:10226680

ISBN-13:9783037857731

Document type:Conference article (CA)

Conference name:2nd International Conference on Opto-Electronics Engineering and Materials Research, OEMR 2013

Conference date:October 19, 2013 - October 20, 2013

Conference location:Zhengzhou, Henan, China

Conference code:100390

Sponsor:Computer Science and Electronic Technology; Trans tech publications inc.; National Cheng Kung University

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:The classical bilateral filtering algorithm is a non-linear and non-iterative image denoising method in spatial domain which utilizes the spatial information and the intensity information between a point and its neighbors to smooth the noisy images while preserving edges well. To further improve the image denoising performance, a spatially adaptive bilateral filtering image deonoising algorithm with low computational complexity is proposed. The proposed algorithm takes advantage of the local statistics characteristic of the image signal to better preserve the edges or textures while suppressing the noise. Experiment results show that the proposed image denoising algorithm achieves better performance than the classical bilateral filtering image denoising method. © (2013) Trans Tech Publications, Switzerland.

Number of references:5

Main heading:Edge detection

Controlled terms:Algorithms - Electronics engineering - Image denoising - Information technology - Iterative methods - Nonlinear filtering

Uncontrolled terms:Bilateral filtering - Image denoising algorithm - Image denoising methods - Intensity information - Local statistics - Low computational complexity - Spatial informations - Spatially adaptive

Classification code:921 Mathematics - 903 Information Science - 723.2 Data Processing and Image Processing - 723 Computer Software, Data Handling and Applications - 718 Telephone Systems and Related Technologies; Line Communications - 921.6 Numerical Methods - 717 Optical Communication - 716 Telecommunication; Radar, Radio and Television - 715 Electronic Equipment, General Purpose and Industrial - 714 Electronic Components and Tubes - 713 Electronic Circuits - 716.1 Information Theory and Signal Processing

DOI:10.4028/www.scientific.net/AMR.760-762.1515

Database:Compendex

Accession number:20134316878069

Title:The factors of spontaneous parametric down conversion process in BiB <inf>3</inf>O<inf>6</inf> crystal with a broadband pump

Authors:Huo, Guangwen (1); Zhang, Tongyi (1); Wan, Rengang (1); Cheng, Guanghua (1); Zhao, Wei (1)

Corresponding author:Zhang, T.(tyzhang@opt.ac.cn)

Source title:Optik

Abbreviated source title:Optik

Volume:124

Issue:24

Issue date:December 2013

Publication year:2013

Pages:6627-6630

Language:English

ISSN:00304026

Document type:Journal article (JA)

Publisher:Urban und Fischer Verlag Jena, P.O. Box 100537, Jena, 07705, Germany

Abstract:We investigate the spontaneous parametric down-conversion (SPDC) process in biaxial nonlinear crystal BiB<inf>3</inf>O<inf>6</inf> (BIBO) with a broadband pump. Under the type I and type II phase-matching conditions, we numerically calculate the influencing factors on SPDC process in BIBO crystal, such as temporal and spatial walk-off, the acceptance angles, and spectral acceptance bandwidth. Comparing the two types of phase-matching, we could conclude that the type II phase-matching in BIBO crystal is better for the SPDC because of zero dispersion and bigger acceptance parameters. These results can be used to construct a system to generate ultra-fast entangled photon pairs. © 2013 Elsevier GmbH. All rights reserved.

Number of references:30

Main heading:Optical frequency conversion

Controlled terms:Phase matching - Photons

Uncontrolled terms:Acceptance angle - Entangled photon pairs - Nonlinear crystals - Phase-matching condition - SPDC - Spontaneous parametric down-conversion - Temporal and spatial - Zero dispersion

Classification code:713 Electronic Circuits - 741.1 Light/Optics - 741.1.1 Nonlinear Optics

DOI:10.1016/j.ijleo.2013.05.114

Database:Compendex

Accession number:20124615668524

Title:Image registration by normalized mapping

Authors:Wang, Qi (1); Zou, Cuiming (3); Yuan, Yuan (1); Lu, Hongbing (4); Yan, Pingkun (1)

Author affiliation:(1) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China; (2) School of Electronic and Control Engineering, Chang'an University, Xi'an 710064, Shaanxi, China; (3) Faculty of Mathematics and Computer Science, Hubei University, Wuhan 430062, Hubei, China; (4) Fourth Military Medical University, Xi'an 710032, Shaanxi, China

Corresponding author:Yan, P.(pingkun.yan@opt.ac.cn)

Source title:Neurocomputing

Abbreviated source title:Neurocomputing

Volume:101

Issue date:February 4, 2013

Publication year:2013

Pages:181-189

Language:English

ISSN:09252312

E-ISSN:18728286

CODEN:NRCGEO

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:A new non-rigid registration method is proposed for the bladder magnetic resonance (MR) images. The key point is normalized mapping, which transforms any image into an intermediate space. Under the uniform space, those anatomical feature points of different images are corresponded by rotating and scaling. In addition, the non-rigid registration is utilized under the application of groupwise registration. By registering a set of images, an unbiased template can be obtained. Based on this template, the analysis towards the group of images can be easily conducted. Experimental results demonstrate that the proposed method can register accurately the target image to the reference image. © 2012 Elsevier B.V.

Number of references:43

Main heading:Mapping

Controlled terms:Image registration - Magnetic resonance - Magnetic resonance imaging

Uncontrolled terms:Anatomical features - Groupwise registration - Keypoints - Manifold learning - MR images - Nonrigid registration - Nonrigid registration method - Reference image - Target images - Uniform spaces

Classification code:701.2 Magnetism: Basic Concepts and Phenomena - 723.2 Data Processing and Image Processing - 902.1 Engineering Graphics

DOI:10.1016/j.neucom.2012.08.012

Database:Compendex

Accession number:20131516184347

Title:Effects of alkaline-earth fluorides and OH- on spectroscopic properties of Yb3+ doped TeO<inf>2</inf>-ZnO-B<inf>2</inf>O <inf>3</inf> based glasses

Authors:Xu, Shennuo (1); Wang, Pengfei (1); Zheng, Ruilin (3); Wei, Wei (1); Peng, Bo (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) Graduate University, Chinese Academy of Sciences, Beijing 100039, China; (3) Key Laboratory for Organic Electronics and Information Displays, Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, Nanjing 210046, China

Corresponding author:Wei, W.(weiwei@njupt.edu.cn)

Source title:Journal of Luminescence

Abbreviated source title:J Lumin

Volume:140

Issue date:2013

Publication year:2013

Pages:26-29

Language:English

ISSN:00222313

CODEN:JLUMA8

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:New kinds of Yb<inf>2</inf>O<inf>3</inf>-doped boro-tellurite (TeO <inf>2</inf>-ZnO-B<inf>2</inf>O<inf>3</inf>) based glasses were prepared by introducing alkaline-earth fluorides (MgF<inf>2</inf>, CaF<inf>2</inf>, SrF <inf>2</inf>, and BaF<inf>2</inf>). Their structural and spectroscopic properties were investigated by Raman and absorption spectra measurements. Dehydration ability of alkaline-earth fluorides was studied. The OH can have an obvious effect on fluorescence lifetime of Yb3+, when OH concentration is higher than N<inf>OH</inf>=4.66×1019 cm -3. For TeO<inf>2</inf>-ZnO-B<inf>2</inf>O<inf>3</inf>-BaF <inf>2</inf> glass system, the peak values of integrated absorption and emission cross-sections achieve 7.44×104 pm3 and 1.416 pm2, respectively. It indicates that the Yb3+-doped boro-tellurite glasses containing alkaline-earth fluorides are potential materials for waveguide laser, and optical amplifier. © 2013 Elsevier B.V.

Number of references:32

Main heading:Glass

Controlled terms:Barium compounds - Light amplifiers - Raman scattering - Tellurium compounds - Ytterbium - Zinc oxide

Uncontrolled terms:Absorption and emission cross-sections - Alkaline earth fluorides - Emission cross-section - Fluorescence lifetimes - Potential materials - Spectra measurements - Spectroscopic property - Waveguide lasers

Classification code:547.2 Rare Earth Metals - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 804.2 Inorganic Compounds - 812.3 Glass

DOI:10.1016/j.jlumin.2013.02.056

Database:Compendex

Accession number:20133616702323

Title:A design of intelligent transfusion monitoring system based on the DSP and fuzzy control algorithm

Authors:Qiao, Yongming (1); Wu, Xiangfu (1)

Author affiliation:(1) Institute of Optics and Precision Mechanics of CAS, Xi'an, China

Source title:Proceedings of the 2013 International Conference on Intelligent Control and Information Processing, ICICIP 2013

Abbreviated source title:Proc. Int. Conf. Intell. Control Inf. Process., ICICIP

Monograph title:Proceedings of the 2013 International Conference on Intelligent Control and Information Processing, ICICIP 2013

Issue date:2013

Publication year:2013

Pages:417-421

Article number:6568109

Language:English

ISBN-13:9781467362481

Document type:Conference article (CA)

Conference name:2013 4th International Conference on Intelligent Control and Information Processing, ICICIP 2013

Conference date:June 9, 2013 - June 11, 2013

Conference location:Beijing, China

Conference code:98950

Sponsor:University of Illinois at Chicago; National Natural Science Foundation of China

Publisher:IEEE Computer Society, 2001 L Street N.W., Suite 700, Washington, DC 20036-4928, United States

Abstract:Aiming at resolving the defects of manual monitoring during the clinical transfusion process presently, this paper designs an intelligent transfusion monitoring system which uses TMS320F28335 as the microcontroller core. This system is a master-slave distributed architecture. The master station at the health care room can remotely monitor the transfusion process with the help of the application that operates on PC, whereas the slave station, a DSP embedded system, uses a miniature peristaltic pump driven by stepper motor to control the transfusion speed based on the fuzzy control algorithm. The master station can communicate with slave stations with wireless modules through the serial port, so nurses can timely monitor the transfusion process. The experimental results show that this system has advantages such as high accuracy of speed adjustment, quick response and low steady-state error. Because of the good performance and low cost, this system can be widely used in clinical transfusion and pharmaceutical composition analysis occasions. © 2013 IEEE.

Number of references:6

Main heading:Algorithms

Controlled terms:Data processing - Embedded systems - Fuzzy control - Intelligent control - Monitoring

Uncontrolled terms:Composition analysis - Distributed architecture - DSP embedded system - Manual monitoring - Microcontroller core - Monitoring system - Peristaltic pump - Steady state errors

Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 921 Mathematics - 731.1 Control Systems - 731 Automatic Control Principles and Applications - 723 Computer Software, Data Handling and Applications - 722 Computer Systems and Equipment

DOI:10.1109/ICICIP.2013.6568109

Database:Compendex

Accession number:20133616702343

Title:Implementation and performance of image filtering on GPU

Authors:Chen, Xi (1); Qiu, Yuehong (1); Yi, Hongwei (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an, China

Source title:Proceedings of the 2013 International Conference on Intelligent Control and Information Processing, ICICIP 2013

Abbreviated source title:Proc. Int. Conf. Intell. Control Inf. Process., ICICIP

Monograph title:Proceedings of the 2013 International Conference on Intelligent Control and Information Processing, ICICIP 2013

Issue date:2013

Publication year:2013

Pages:514-517

Article number:6568129

Language:English

ISBN-13:9781467362481

Document type:Conference article (CA)

Conference name:2013 4th International Conference on Intelligent Control and Information Processing, ICICIP 2013

Conference date:June 9, 2013 - June 11, 2013

Conference location:Beijing, China

Conference code:98950

Sponsor:University of Illinois at Chicago; National Natural Science Foundation of China

Publisher:IEEE Computer Society, 2001 L Street N.W., Suite 700, Washington, DC 20036-4928, United States

Abstract:Image filtering is one of the most important parts in the image-processing. It takes much more time to performance the convolution in image filtering on CPU since the computation demanding of image filtering is massive. Contrast to CPU, GPU may be a good way to accelerate the image filtering. CUDA(Compute Unified Device Architecture) is a parallel computing architecture developed by NVIDIA. CUDA is highly suited for general purpose programming on GPU which is a programming interface to use the parallel architecture for general purpose computing. This interface is a set of library functions which can be coded as an extension of C language. In this paper, the filtering was implemented in the frequency domain instead of the spatial domain since the filtering in the frequency domain is faster than convolution in the spatial domain if we have filters with many coefficients and filtering in 2D. Compared with the traditional method of image filtering which was performed on CPU, the implementation of image filtering on GPU has a speedup of approximately 10 times. GPU has great potential as high-performance co-processor. © 2013 IEEE.

Number of references:11

Main heading:C (programming language)

Controlled terms:Convolution - Data processing - Frequency domain analysis - Intelligent control - Parallel architectures

Uncontrolled terms:CUDA (compute unified device architecture) - Filtering in the frequency domain - Frequency domains - General purpose programming - General-purpose computing - Library functions - Parallel computing architecture - Programming interface

Classification code:716.1 Information Theory and Signal Processing - 722 Computer Systems and Equipment - 723 Computer Software, Data Handling and Applications - 731.1 Control Systems

DOI:10.1109/ICICIP.2013.6568129

Database:Compendex

Accession number:20134817019583

Title:Universal blind image quality assessment metrics via natural scene statistics and multiple kernel learning

Authors:Gao, Xinbo (1); Gao, Fei (1); Tao, Dacheng (2); Li, Xuelong (3)

Author affiliation:(1) VIPS Laboratory, School of Electronic Engineering, Xidian University, Xi'an 710071, China; (2) Centre for Quantum Computation and Intelligent Systems, Faculty of Engineering and Information Technology, University of Technology, Sydney, Ultimo, NSW 2007, Australia; (3) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China

Source title:IEEE Transactions on Neural Networks and Learning Systems

Abbreviated source title:IEEE Trans. Neural Networks Learn. Sys.

Volume:24

Issue:12

Issue date:2013

Publication year:2013

Pages:2013-2026

Article number:6562812

Language:English

ISSN:2162237X

E-ISSN:21622388

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., 445 Hoes Lane / P.O. Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:Universal blind image quality assessment (IQA) metrics that can work for various distortions are of great importance for image processing systems, because neither ground truths are available nor the distortion types are aware all the time in practice. Existing state-of-the-art universal blind IQA algorithms are developed based on natural scene statistics (NSS). Although NSS-based metrics obtained promising performance, they have some limitations: 1) they use either the Gaussian scale mixture model or generalized Gaussian density to predict the nonGaussian marginal distribution of wavelet, Gabor, or discrete cosine transform coefficients. The prediction error makes the extracted features unable to reflect the change in nonGaussianity (NG) accurately. The existing algorithms use the joint statistical model and structural similarity to model the local dependency (LD). Although this LD essentially encodes the information redundancy in natural images, these models do not use information divergence to measure the LD. Although the exponential decay characteristic (EDC) represents the property of natural images that large/small wavelet coefficient magnitudes tend to be persistent across scales, which is highly correlated with image degradations, it has not been applied to the universal blind IQA metrics; and 2) all the universal blind IQA metrics use the same similarity measure for different features for learning the universal blind IQA metrics, though these features have different properties. To address the aforementioned problems, we propose to construct new universal blind quality indicators using all the three types of NSS, i.e., the NG, LD, and EDC, and incorporating the heterogeneous property of multiple kernel learning (MKL). By analyzing how different distortions affect these statistical properties, we present two universal blind quality assessment models, NSS global scheme and NSS two-step scheme. In the proposed metrics: 1) we exploit the NG of natural images using the original marginal distribution of wavelet coefficients; 2) we measure correlations between wavelet coefficients using mutual information defined in information theory; 3) we use features of EDC in universal blind image quality prediction directly; and 4) we introduce MKL to measure the similarity of different features using different kernels. Thorough experimental results on the Laboratory for Image and Video Engineering database II and the Tampere Image Database2008 demonstrate that both metrics are in remarkably high consistency with the human perception, and overwhelm representative universal blind algorithms as well as some standard full reference quality indexes for various types of distortions. © 2012 IEEE.

Number of references:55

Main heading:Image quality

Controlled terms:Algorithms - Forecasting - Wavelet transforms

Uncontrolled terms:Discrete cosine transform coefficients - Exponential decays - Gaussian scale mixture models - Generalized Gaussian density - Image quality assessment (IQA) - Multiple Kernel Learning - Natural scene statistics - Non-Gaussian marginal distribution

Classification code:723 Computer Software, Data Handling and Applications - 741 Light, Optics and Optical Devices - 921 Mathematics - 921.3 Mathematical Transformations

DOI:10.1109/TNNLS.2013.2271356

Database:Compendex

Accession number:20131016085507

Title:Space high precision multi-thermoelectric coolers controller design

Authors:Yunfei, Du (1); Wei, Gao (1); Mingwei, Luo (1); Xuewu, Fan (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xian, Shaanxi, 710119, China

Corresponding author:Yunfei, D.(duyf_mail@163.com)

Source title:Proceedings of the 2013 3rd International Conference on Intelligent System Design and Engineering Applications, ISDEA 2013

Abbreviated source title:Proc. Int. Conf. Intelligent Syst. Des. Eng. Appl., ISDEA

Monograph title:Proceedings of the 2013 3rd International Conference on Intelligent System Design and Engineering Applications, ISDEA 2013

Issue date:2013

Publication year:2013

Pages:1276-1278

Article number:6455430

Language:English

ISBN-13:9780769549231

Document type:Conference article (CA)

Conference name:2013 3rd International Conference on Intelligent System Design and Engineering Applications, ISDEA 2013

Conference date:January 16, 2013 - January 18, 2013

Conference location:Hong Kong, China

Conference code:95817

Sponsor:Hunan University of Technology; St. John's University; Hunan Institute of Humanities Science and Technology; Department of Electronics Science and Technology; National University of Defense Technology

Publisher:IEEE Computer Society, 2001 L Street N.W., Suite 700, Washington, DC 20036-4928, United States

Abstract:With the advancement of high performance charge coupled device (CCD) in aerospace imaging detection, image quality is placed a high value. The importance of an ideal CCD working ambient temperature is realized with the deeply researching of the characters of CCD. A temperature controlling system based on multi-TECs is introduced deriving from the need to prevent thermally induced dark currents from becoming the dominate noise source. -65°C± 2 °C is the designed value for best function of the CCD used in our project. The principle and work mode of TEC are analyzed. An originally multi-TECs controller design is given for meeting this requirement as well as power and cubage. PWM control and linear control are actualized on two types of TECs according to different application mode. Below 10% current ripple is acquired and the temperature stabilization is below±0.6°C. The ambient temperature is achieved nicely in simulating CCD working cabin experiment stably and efficiently. © 2012 IEEE.

Number of references:10

Main heading:Thermoelectricity

Controlled terms:Charge coupled devices - Controllers - Intelligent systems - Linear control systems - Pulse width modulation - Systems analysis - Temperature - Thermoelectric equipment - Thermoelectric refrigeration

Uncontrolled terms:Application modes - Best function - Controller designs - Current ripples - High precision - Imaging detections - Linear controls - Multi-thermoelectric coolers (multi-TECs) - Noise source - Pulse width modulation control - PWM control - Temperature controlling - Temperature stabilization - Thermally induced - Work mode

Classification code:961 Systems Science - 732.1 Control Equipment - 723.4 Artificial Intelligence - 716 Telecommunication; Radar, Radio and Television - 714.2 Semiconductor Devices and Integrated Circuits - 641.1 Thermodynamics - 615.4 Thermoelectric Energy

DOI:10.1109/ISDEA.2012.300

Database:Compendex

Accession number:20141717632768

Title:A novel rain detection and removal approach using guided filtering and formation modeling

Authors:Zhu, Qingsong (1); Shao, Ling (2); Heng, Pheng Ann (3); Li, Xuelong (4)

Author affiliation:(1) Shenzhen Institutes of Advanced Technology, Chinese Advanced of Sciences, Shenzhen, China; (2) Department of Electronic and Electrical Engineering, University of Sheffield, Sheffield, S1 3JD, United Kingdom; (3) Department of Computer Science and Engineering, Chinese University of Hong Kong, Ho Sin-Hang Engineering Building, Shatin, N.T., Hong Kong; (4) Centre for OPTical IMagery Analysis and Learning (OPTIMAL), Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, Shanxi, China

Source title:2013 IEEE International Conference on Robotics and Biomimetics, ROBIO 2013

Abbreviated source title:IEEE Int. Conf. Rob. Biomimetics, ROBIO

Monograph title:2013 IEEE International Conference on Robotics and Biomimetics, ROBIO 2013

Issue date:2013

Publication year:2013

Pages:563-567

Article number:6739519

Language:English

Document type:Conference article (CA)

Conference name:2013 IEEE International Conference on Robotics and Biomimetics, ROBIO 2013

Conference date:December 12, 2013 - December 14, 2013

Conference location:Shenzhen, China

Conference code:104586

Publisher:IEEE Computer Society

Abstract:The task of removing rain is of great significance for outdoor vision systems such as video surveillance, vision based navigation and so on. Rain produces complex time varying intensity fluctuations in images or videos, which seriously reduce the performance of outdoor vision systems. Due to similar visual appearances of rain and moving objects, the current rain removal algorithms cannot easily distinguish between the two. In this paper, we propose a novel algorithm for rain detection and removal based on the rain image formation model and edge-preserving filtering. The effectiveness of our algorithm is demonstrated in comparison with the existing approaches, by experimenting on videos of intricate scenes with moving objects or time-varying textures. © 2013 IEEE.

Number of references:14

Main heading:Rain

Controlled terms:Algorithms - Biomimetics - Computer vision - Robotics - Robots - Security systems

Uncontrolled terms:Edge-preserving filtering - Formation model - Guided filtering - Image formation models - Intensity fluctuations - Video surveillance - Vision based navigation - Visual appearance

Classification code:443.3 Precipitation - 461.9 Biology - 723 Computer Software, Data Handling and Applications - 723.5 Computer Applications - 731.5 Robotics - 731.6 Robot Applications - 914.1 Accidents and Accident Prevention - 921 Mathematics

DOI:10.1109/ROBIO.2013.6739519

Database:Compendex

Accession number:20133416654651

Title:Compact all-fiber laser delivering conventional and dissipative solitons

Authors:Mao, Dong (1); Liu, Xueming (1); Han, Dongdong (1); Lu, Hua (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Liu, X.(liuxueming72@yahoo.com)

Source title:Optics Letters

Abbreviated source title:Opt. Lett.

Volume:38

Issue:16

Issue date:2013

Publication year:2013

Pages:3190-3193

Language:English

ISSN:01469592

E-ISSN:15394794

CODEN:OPLEDP

Document type:Journal article (JA)

Publisher:Optical Society of America, 2010 Massachusetts Ave, NW, Washington, DC, DC 20036-1023, United States

Abstract:We report the simultaneous generation of conventional soliton (CS) and dissipative soliton (DS) in a mode-locked fiber laser exploiting chirped fiber Bragg grating and four-port circulator. The bandwidth and duration of the CS are 0.28 nm and 15.1 ps, respectively. However, the giant-chirp DS exhibits a quasi-rectangular spectrum with a bandwidth of 9.5 nm. The duration of the output DS is 7.3 ps and can be compressed to 0.55 ps external to the cavity. Our numerical results agree well with the experimental observations. The flexible all-fiber laser can provide three different pulse sources, which is convenient and attractive for practical applications. © 2013 Optical Society of America.

Number of references:30

Main heading:Fiber lasers

Controlled terms:Bandwidth - Solitons

Uncontrolled terms:All-fiber lasers - Chirped fiber Bragg grating - Dissipative solitons - Numerical results - Pulse sources

Classification code:716.1 Information Theory and Signal Processing - 741.1.2 Fiber Optics - 931.3 Atomic and Molecular Physics

DOI:10.1364/OL.38.003190

Database:Compendex

Accession number:20131316148899

Title:Robust visual tracking with discriminative sparse learning

Authors:Lu, Xiaoqiang (1); Yuan, Yuan (1); Yan, Pingkun (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China

Corresponding author:Yuan, Y.(yuany@opt.ac.cn)

Source title:Pattern Recognition

Abbreviated source title:Pattern Recogn.

Volume:46

Issue:7

Issue date:July 2013

Publication year:2013

Pages:1762-1771

Language:English

ISSN:00313203

CODEN:PTNRA8

Document type:Journal article (JA)

Publisher:Elsevier Ltd, Langford Lane, Kidlington, Oxford, OX5 1GB, United Kingdom

Abstract:Recently, sparse representation in the task of visual tracking has been obtained increasing attention and many algorithms are proposed based on it. In these algorithms for visual tracking, each candidate target is sparsely represented by a set of target templates. However, these algorithms fail to consider the structural information of the space of the target templates, i.e., target template set. In this paper, we propose an algorithm named non-local self-similarity (NLSS) based sparse coding algorithm (NLSSC) to learn the sparse representations, which considers the geometrical structure of the set of target candidates. By using non-local self-similarity (NLSS) as a smooth operator, the proposed method can turn the tracking into sparse representations problems, in which the information of the set of target candidates is exploited. Extensive experimental results on visual tracking have demonstrated the effectiveness of the proposed algorithm. © 2013 Elsevier Ltd. All rights reserved.

Number of references:36

Main heading:Tracking (position)

Controlled terms:Algorithms

Uncontrolled terms:Candidate target - Geometrical structure - Particle filter - Self-similarities - Smooth operator - Sparse representation - Structural information - Visual Tracking

Classification code:716.2 Radar Systems and Equipment - 723 Computer Software, Data Handling and Applications - 921 Mathematics

DOI:10.1016/j.patcog.2012.11.016

Database:Compendex

Accession number:20131016077661

Title:Design of an outer baffle based on scattering model

Authors:Mei, Chao (1); Zhou, Sizhong (1); Yan, Peipei (1); Jiang, Kai (1)

Corresponding author:Mei, C.(s09026@opt.cn)

Source title:Guangxue Xuebao/Acta Optica Sinica

Abbreviated source title:Guangxue Xuebao

Volume:33

Issue:1

Issue date:January 2013

Publication year:2013

Article number:0122005

Language:Chinese

ISSN:02532239

CODEN:GUXUDC

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:By the analysis of the scattering situation of the rough surface, it is found that the ordinary metal material scattering energy is centralized in 10°. Based on the scattering characteristics, the method of the outer baffle design is put forward, the baffle rings' restraint angle is 5° larger than the stray light suppression angle which is calculated based on reflection theory, and the effect of the outer baffle to suppress the stray light is very good. The baffle is designed for a Ritchey-Chirtien (R-C) system and the model is built in the TracePro software for analysis. With the contrast of different models and the designs, the results show that the consideration of the scattering is more accurate, the effect of the outer baffle is better, and the point source transmittance (PST) of the system is lower than others.

Number of references:18

Main heading:Forward scattering

Controlled terms:C (programming language) - Optical design - Scattering - Stray light

Uncontrolled terms:Built in - Metal materials - Outer baffle - Point sources - Reflection theory - Rough surfaces - Scattering char-acteristics - Scattering model - Stray light suppression - TracePro

Classification code:711 Electromagnetic Waves - 723.1.1 Computer Programming Languages - 741.1 Light/Optics

DOI:10.3788/AOS201333.0122005

Database:Compendex

Accession number:20134416940648

Title:Impact of three-axis error on angle measurement of photoelectric theodolite

Authors:Tian, Liude (1); Liu, Chaohui (1); Zhao, Jianke (1); Pan, Liang (1); Duan, Yaxuan (1); Zhang, Zhoufeng (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Tian, L.(tianliude@126.com)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:42

Issue:SUPPL.1

Issue date:2013

Publication year:2013

Pages:192-197

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:Shafting is the key module of photoelectric theodolite to decide the measurement precision, three-axis error is the main factor affecting the accuracy of photoelectric theodolite angle measuring. According to the three axis horizontal structure, the spherical coordinate system was set up and the accurate mathematical model of the measurement error caused by shafting error was deduced using spherical trigonometry knowledge. The simplified model suitable for engineering application was obtained by simplifying the accurate model. The simulation results show that collimation error and horizontal axis tilt have great effect on azimuth angle measuring, the larger target pitch angle is, the more serious the effect is. However, collimation error and horizontal axis tilt has little influence on pitch angle measuring, and the influence can be neglected. The effect of vertical axis tilt error on azimuth angle and elevation angle measuring is the sine function of target azimuth. The influence of vertical axis tilt on azimuth angle and elevation angle measuring is the sine function of the target azimuth. It can provide an effective method to analyze accuracy, distribute and correct error of the photoelectric theodolite.

Number of references:8

Main heading:Angle measurement

Controlled terms:Functions - Geometry - Mathematical models - Measurement errors - Photoelectricity - Spheres

Uncontrolled terms:Accurate modeling - Angle measuring - Elevation angle - Engineering applications - Measurement precision - Photoelectric theodolite - Spherical coordinate systems - Spherical trigonometry

Classification code:631 Fluid Flow - 741.1 Light/Optics - 921 Mathematics - 922 Statistical Methods - 943.2 Mechanical Variables Measurements

Database:Compendex

Accession number:20134817032685

Title:Simulation of laser beam propagation through the troposphere

Authors:Wang, Bao-Feng (1); Luo, Xiu-Juan (1); Zhang, Yu (1); Zeng, Zhi-Hong (1); Wang, Feng (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision, Mechanics of Chinese Academy of Science, Xi'an 710119, China; (2) University of Chinese, Academy of Sciences, Beijing 100039, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8905

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Laser Sensing and Imaging and Applications

Issue date:2013

Publication year:2013

Article number:89050D

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497741

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE); The Optical Society; European Optical Society; Chinese Society of Astronautics

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:Understanding and predicting laser beam propagation effects in the atmosphere is important for laser applications. Turbulence effects cause beam wander, beam broadening, intensity scintillations, which reducing the power in bucket and the tracking accuracy, etc. In this work, the phase screens are used to model atmosphere turbulence in the model of the laser propagation through troposphere. And according to the characteristics of the troposphere, a layered model is used. Laser propagation follows the Huygens-Fresnel principle between phase screens. Simulations with different grid point numbers were constructed, and numerical experiments were conducted. According to the simulated results including Strehl ratio, sharpness, and amplitude distribution, preceding phase screens have effect on the total energy of the receiving surface, but have little impact on amplitude distribution. And the phase screens, which are close to the receiving surface, have a significant impact on both amplitude distribution and the total receiving energy. The results suggests that in simulation one should increase grid point numbers as many as possible and needs to pay particular attention to parameters of the phase screens near the receiving surface in simulation. © 2013 SPIE.

Number of references:6

Main heading:Laser beam effects

Controlled terms:Laser applications - Lasers - Light propagation - Models - Troposphere - Turbulence - Wave propagation

Uncontrolled terms:Amplitude distributions - Huygens-Fresnel principle - Intensity scintillations - Laser propagation - Numerical experiments - Phase screen - Simulated results - Strehl Ratio

Classification code:443.1 Atmospheric Properties - 711 Electromagnetic Waves - 741.1 Light/Optics - 744 Lasers - 902.1 Engineering Graphics

DOI:10.1117/12.2032170

Database:Compendex

Accession number:20130415941934

Title:Target tracking system based on inertial stabilized platform

Authors:Chen, Ying (1); Xue, Yuanyuan (1); Zhang, Xiajiang (1); Tang, Chao (2); Jiang, Nan (2)

Author affiliation:(1) Xi'an Institute of Applied Optical, Xi'an, 710065, China; (2) Xi'an Institue of AVIC Computing Technique, Xi'an, 710068, China

Corresponding author:Chen, Y.(chenyn_0@126.com)

Source title:Applied Mechanics and Materials

Abbreviated source title:Appl. Mech. Mater.

Volume:271

Issue:PART 1

Monograph title:Frontiers of Manufacturing and Design Science III

Issue date:2013

Publication year:2013

Pages:1669-1674

Language:English

ISSN:16609336

E-ISSN:16627482

ISBN-13:9783037855782

Document type:Conference article (CA)

Conference name:3rd International Conference on Frontiers of Manufacturing and Design Science, ICFMD 2012

Conference date:December 11, 2012 - December 13, 2012

Conference location:Hong kong

Conference code:95055

Sponsor:Control Eng. Inf. Sci. Res. Assoc.; International Frontiers of science; and technology Research Association; National Chin-Yi University of Technology; Integrated Research Center for Green Living Techniques; Trans Tech Publication

Publisher:Trans Tech Publications, P.O. Box 1254, Clausthal-Zellerfeld, D-38670, Germany

Abstract:A target tracking system based on inertial stabilized platform ISP is introduced, which can fulfill platform inertial navigation, platform stabilization and target tracking. An IMU is integrated with electro-optical sensors and a laser range finder on a gimbal, which performs attitude transformation by constructing navigation coordinates in a mathematic platform, and the platform inertial information is obtained by transformation matrix between platform and payload coordinates. The inertial platform comprising gyros, electro-optical sensors and servo mechanism is capable of stabilizing line of sight and can be used to track targets in the relevant field of view (FOV). The system can determine geography coordinates of the host platform and target only with inertial information and laser ranging data. The geo-tracking system always locked the target image at the center of FOV by calculating spatial geometry and adjusting LOS attitude. This tracking is different from TV tracking and geo-reference image tracking, which may be influenced by fog and obscurant. When the helicopter is flying over urban or mountain areas for rescue missions, it can avoid the loss of targets due to strong maneuver or LOS obscuration, and reduce the operation load of the aircrew and improve rescue efficiency. © (2013) Trans Tech Publications, Switzerland.

Number of references:5

Main heading:Target tracking

Controlled terms:Design - Electrooptical devices - Lasers - Linear transformations - Manufacture

Uncontrolled terms:Electrooptical sensors - Field of views - Geo-reference images - Inertial navigations - Inertial platforms - Laser range finders - Laser ranging - Line of Sight - Mathematic platform - Rescue missions - Spatial geometry - Stabilized platform - Target images - Target tracking systems - Transformation matrices - TV tracking

Classification code:408 Structural Design - 537.1 Heat Treatment Processes - 714 Electronic Components and Tubes - 716.2 Radar Systems and Equipment - 744.1 Lasers, General - 921.3 Mathematical Transformations

DOI:10.4028/www.scientific.net/AMM.271-272.1669

Database:Compendex

Accession number:20133416639629

Title:Bidirectional fiber soliton laser mode-locked by single-wall carbon nanotubes

Authors:Zeng, Chao (1); Liu, Xueming (1); Yun, Ling (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Liu, X.(liuxueming72@yahoo.com)

Source title:Optics Express

Abbreviated source title:Opt. Express

Volume:21

Issue:16

Issue date:August 12, 2013

Publication year:2013

Pages:18937-18942

Language:English

E-ISSN:10944087

Document type:Journal article (JA)

Publisher:Optical Society of America, 2010 Massachusetts Ave, NW, Washington, DC, DC 20036-1023, United States

Abstract:We report on the experimental observation of a bidirectional fiber soliton laser passively mode-locked by single-wall carbon nanotubes. Two stable pulse trains in opposite directions are delivered simultaneously from the ring cavity. The counterpropagating pulses have different central wavelengths, pulse durations, and repetition rates. By adjusting the fiber birefringence and cavity length, the central wavelengths of two solitons can be the same or different. Experimental observations and analyses demonstrate that the different operating wavelengths result in the unequal repetition rates of two pulses. These unique features may be attributed to the cavity asymmetry and fiber birefringence. © 2013 Optical Society of America.

Number of references:38

Main heading:Solitons

Controlled terms:Birefringence - Carbon nanotubes - Fibers - Passive mode locking - Pulse repetition rate

Uncontrolled terms:Bidirectional fibers - Central wavelength - Counterpropagating - Experimental observation - Fiber birefringence - Operating wavelength - Passively mode-locked - Pulse durations

Classification code:741.1 Light/Optics - 744.1 Lasers, General - 761 Nanotechnology - 812 Ceramics, Refractories and Glass - 817 Plastics and Other Polymers: Products and Applications - 931.3 Atomic and Molecular Physics

DOI:10.1364/OE.21.018937

Database:Compendex

Accession number:20140217183853

Title:Wannier stark ladder in one-dimensional photonic crystal coupled microcavity containing indefinite metamaterials

Authors:Kang, Yongqiang (1); Zhang, Chunmin (1); Xue, Chunhua (4); Cao, Qizhi (1); Ren, Wenyi (1)

Author affiliation:(1) Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'An Jiaotong University, Ministry of Education, Xi'an 710049, China; (2) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710048, China; (3) School of Physics Science and Electronics, Shanxi Datong University, Datong, Shanxi 037009, China; (4) Department of Computer Engineering, Guangxi University of Science and Technology, Liuzhou, Guangxi 545006, China

Corresponding author:Zhang, C.(zcm@mail.xjtu.edu.cn)

Source title:Journal of Optics (India)

Abbreviated source title:J. Opt.

Volume:42

Issue:4

Issue date:December 2013

Publication year:2013

Pages:335-340

Language:English

ISSN:09728821

E-ISSN:09746900

CODEN:JOPTBQ

Document type:Journal article (JA)

Publisher:Optical Society of India, 92, Acharya Praffula Chandra Road, Calcutta, 700 009, India

Abstract:One-dimensional (1D) photonic crystal coupled microcavity structure containing indefinite metamaterials was investigated. The Wannier-Stark ladder (WSL) can be obtained in both the Bragg ordinary and the well-known omnidirectional band gaps by modulating widths of the cavities. The time-resolved transmission of a short pulse showed the existence of two types of optical Bloch oscillation in such structures. The transmission and the period of the oscillation are found to decrease with the increasing gradient δ. © 2013 Optical Society of India.

Number of references:19

Main heading:Photonic crystals

Controlled terms:Excitons - Metamaterials - Microcavities - Solid state physics

Uncontrolled terms:Bloch oscillations - Coupled microcavities - Omnidirectional band gaps - One dimensional photonic crystal - One-dimensional (1D) photonic crystals - Short pulse - Time-resolved transmission - Wannier-Stark ladder

Classification code:714 Electronic Components and Tubes - 931.3 Atomic and Molecular Physics - 933 Solid State Physics - 933.1 Crystalline Solids - 951 Materials Science

DOI:10.1007/s12596-013-0146-9

Database:Compendex

Accession number:20132316401783

Title:Parallel on-axis phase-shifting holographic phase microscopy based on reflective point-diffraction interferometer with long-term stability

Authors:Guo, Rongli (1); Yao, Baoli (1); Gao, Peng (1); Min, Junwei (1); Han, Jun (2); Yu, Xun (2); Lei, Ming (1); Yan, Shaohui (1); Yang, Yanlong (1); Dan, Dan (1); Ye, Tong (1)

Corresponding author:Yao, B.(yaobl@opt.ac.cn)

Source title:Applied Optics

Abbreviated source title:Appl. Opt.

Volume:52

Issue:15

Issue date:May 20, 2013

Publication year:2013

Pages:3484-3489

Language:English

ISSN:1559128X

E-ISSN:15394522

CODEN:APOPAI

Document type:Journal article (JA)

Publisher:Optical Society of America, 2010 Massachusetts Ave, NW, Washington, DC, DC 20036-1023, United States

Abstract:Parallel on-axis two-step phase-shifting reflective point-diffraction interferometry for holographic phase microscopy based on Michelson architecture is proposed. A cube beamsplitter splits the object wave into two copies within the two arms. The reference wave is rebuilt by low-pass filtering with a pinhole-masked mirror. Both object and reference waves are split into two beams by a grating in a 4f imaging system; thus, two interferograms with quadrature phase-shift can be acquired simultaneously with the aid of polarization elements. The approach has the merit of nanometers-scale phase stability over hours due to its quasi-common-path geometry. It can make full use of camera spatial bandwidth while its temporal resolution is as fast as the camera frame rate. Phase imaging on microscale specimen is implemented, and the experimental results demonstrate that the proposed approach is suitable for investigating dynamic processes. © 2013 Optical Society of America.

Number of references:46

Main heading:Phase shift

Controlled terms:Cameras - Diffraction - Holographic interferometry - Phase stability

Uncontrolled terms:4f imaging systems - Long term stability - Low-pass filtering - Point diffraction interferometer - Point diffraction interferometry - Polarization elements - Spatial bandwidth - Temporal resolution

Classification code:531 Metallurgy and Metallography - 641 Heat and Mass Transfer; Thermodynamics - 711.1 Electromagnetic Waves in Different Media - 742.2 Photographic Equipment - 941.4 Optical Variables Measurements - 942.2 Electric Variables Measurements

DOI:10.1364/AO.52.003484

Database:Compendex

Accession number:20133516679479

Title:Simulative study of optical pulse propagation in water based on Fournier-Forand and Henyey-Greenstein volume scattering functions

Authors:Wei, Anhai (1); Zhao, Wei (1); Han, Biao (1); Xie, Xiaoping (1); Hu, Hui (1); Su, Yulong (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100049, China; (3) Xi'an Communication College, Shaanxi 710106, China

Corresponding author:Zhao, W.(weiz@opt.ac.cn)

Source title:Guangxue Xuebao/Acta Optica Sinica

Abbreviated source title:Guangxue Xuebao

Volume:33

Issue:6

Issue date:June 2013

Publication year:2013

Article number:0601003

Language:Chinese

ISSN:02532239

CODEN:GUXUDC

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:A simulative model with Monte Carlo method is established based on Fournier-Forand and Henyey-Greenstein volume scattering functions, by which propagation characteristics of optical pulse underwater can be analyzed. By using this model, the influence of scattering particles' relative refractive index and size distribution on optical pulse propagation in water is analyzed. The results show that, with the increase of the relative refractive index of scattering particles and small scattering particles' relative quantity, the width of optical pulse is broadened more evidently in time domain, the forward scattering becomes weaker with a more disperse space distribution and arrival angles' distribution. Compared with traditional simulative models, the method presented is more effective.

Number of references:22

Main heading:Scattering

Controlled terms:Laser pulses - Monte Carlo methods - Refractive index

Uncontrolled terms:Arrival angles - Ocean optics - Optical pulse propagation - Propagation characteristics - Scattering particles - Simulative models - Space distribution - Volume scattering function

Classification code:741.1 Light/Optics - 744.1 Lasers, General - 922.2 Mathematical Statistics

DOI:10.3788/AOS201333.0601003

Database:Compendex

Accession number:20134717009975

Title:Mid-infrared fluorotellurite glasses and fibers

Authors:Zhan, Huan (1); Zhang, Aidong (1); He, Jianli (1); Zhou, Zhiguang (1); Li, Lu (1); Lin, Aoxiang (1)

Corresponding author:Lin, A.(aoxiang@opt.ac.cn)

Source title:CLEO: QELS_Fundamental Science, CLEO:QELS FS 2013

Abbreviated source title:Fundam. Sci.

Monograph title:CLEO: QELS_Fundamental Science, CLEO:QELS FS 2013

Issue date:2013

Publication year:2013

Pages:JTu4A.11

Language:English

ISBN-13:9781557529725

Document type:Conference article (CA)

Conference name:CLEO: QELS_Fundamental Science, CLEO:QELS FS 2013

Conference date:June 9, 2013 - June 14, 2013

Conference location:San Jose, CA, United states

Conference code:100561

Publisher:Optical Society of American (OSA), 2010 Massachusetts Ave, NW, Washington, DC, DC 20036, United States

Number of references:5

Main heading:Glass

Controlled terms:Metal ions

Uncontrolled terms:Background loss - Fabrication and characterizations - Fluoro-tellurite glass - Midinfrared

Classification code:533 Ore Treatment and Metal Refining - 812.3 Glass

Database:Compendex

Accession number:20135017079644

Title:Engineering of phase matching for mid-infrared coherent anti-Stokes Raman wavelength conversion with orthogonally polarized pump and Stokes waves in silicon-on-sapphire waveguides

Authors:Wang, Zhaolu (1); Liu, Hongjun (1); Huang, Nan (1); Sun, Qibing (1); Li, Xuefeng (2)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science (CAS), Xi'an 710119, China; (2) School of Science, Xi'an University of Post and Telecommunications, Xi'an 710121, China

Corresponding author:Liu, H.(liuhongjun@opt.ac.cn)

Source title:Applied Optics

Abbreviated source title:Appl. Opt.

Volume:52

Issue:33

Issue date:November 20, 2013

Publication year:2013

Pages:8095-8101

Language:English

ISSN:1559128X

E-ISSN:15394522

CODEN:APOPAI

Document type:Journal article (JA)

Publisher:Optical Society of American (OSA)

Abstract:The conversion efficiency of mid-infrared wavelength conversion based on coherent anti-Stokes Raman scattering with TE-polarized pump and TM-polarized Stokes waves is theoretically investigated in silicon-on-sapphire (SOS) waveguides. The peak conversion efficiency of -10 dB is obtained when the linear propagation loss is 1 dB/cm at &delta;k = 0; however, it is reduced to -13.6 dB when the linear propagation loss is 2 dB/cm. The phase matching for wavelength conversion with orthogonally polarized pump and Stokes waves can be realized by engineering the birefringence in SOS waveguides, because proper phase mismatch induced by birefringence together with material dispersion-induced phase mismatch can counteract the large phase mismatch induced by waveguide dispersion. Moreover, compared with the phase matching for identically polarized pump and Stokes waves, the phase matching for orthogonally polarized pump and Stokes waves can be realized in a SOS waveguide with much smaller cross section, which reduces the power requirement for optical systems. © 2013 Optical Society of America.

Number of references:35

Main heading:Dispersion (waves)

Controlled terms:Birefringence - Conversion efficiency - Dispersions - Infrared devices - Phase matching - Raman spectroscopy - Systems engineering - Waveguides

Uncontrolled terms:Coherent anti-Stokes Raman - Coherent anti-Stokes Raman scattering - Linear propagation - Mid-infrared wavelengths - Phase mismatch - Power requirement - Silicon-on-sapphire - Waveguide dispersions

Classification code:525.5 Energy Conversion Issues - 711.1 Electromagnetic Waves in Different Media - 713 Electronic Circuits - 714.3 Waveguides - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 912 Industrial Engineering and Management - 951 Materials Science - 961 Systems Science

DOI:10.1364/AO.52.008095

Database:Compendex

Accession number:20133116570590

Title:High-birefringence, low-loss porous fiber for single-mode terahertz-wave guidance

Authors:Chen, Na-Na (1); Liang, Jian (1); Ren, Li-Yong (1)

Corresponding author:Ren, L.-Y.(renliy@opt.ac.cn)

Source title:Applied Optics

Abbreviated source title:Appl. Opt.

Volume:52

Issue:21

Issue date:July 20, 2013

Publication year:2013

Pages:5297-5302

Language:English

ISSN:1559128X

E-ISSN:15394522

CODEN:APOPAI

Document type:Journal article (JA)

Publisher:Optical Society of American (OSA)

Abstract:A new kind of polymer porous fiber with elliptical air-holes is designed for obtaining high birefringence in the terahertz (THz) frequency range in this paper. Using the finite element method, the properties of this kind of fiber are simulated in detail including the single-mode propagation condition, the birefringence, and the loss. Theoretical results indicate that the single-mode THz wave in the frequency range from 0.73 to 1.22 THz can be guided in the fiber; the birefringence can be enhanced by rotating the major axis of the elliptical air-hole and there exists an optimal rotating angle at 30°. At this optimal angle a birefringence as high as 0.0445 can be obtained in a wide frequency range. Low-loss THz guidance can be achieved owing to the effective reduction of the material absorption in such a porous fiber. This research is useful for polarization-maintaining THz-wave guidance. © 2013 Optical Society of America.

Number of references:28

Main heading:Fibers

Controlled terms:Birefringence - Terahertz waves

Uncontrolled terms:Frequency ranges - High birefringence - Material absorption - Polarization maintaining - Rotating angle - Single mode propagation - Terahertz frequencies - Wide frequency range

Classification code:711 Electromagnetic Waves - 741.1 Light/Optics - 812 Ceramics, Refractories and Glass - 817 Plastics and Other Polymers: Products and Applications

DOI:10.1364/AO.52.005297

Database:Compendex

Accession number:20141317501146

Title:The influence of atmospheric turbulence on IM/DD space optical communication system

Authors:Wei, Anhai (1); Han, Biao (1); Zhao, Wei (1); Xie, Xiaoping (1); Hu, Hui (1); Su, Yulong (1); Zhang, Kewei (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, State Key Laboratory of Transient Optics and Photonics, Xi'an, 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100049, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8906

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Laser Communication Technologies and Systems

Issue date:2013

Publication year:2013

Article number:890610

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497758

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:Lots of researches have simulated performance of optical system based on plane wave or spherical wave model, but optical field is Gauss distribution in real optical communication system. So we derive the relationships between the signal-to-noise ratio (SNR), bit error rate (BER), channel capacity (C) and the transmission distance of the space laser communication system, which is obtained by the Gaussian beam propagation model for on-off keying (OOK) modulated signal under horizontal link. We numerically study the influence of atmospheric turbulence on system performance. we get the conclusions: Under weak turbulence intensity, as the turbulence intensity increases, the C and SNR for OOK modulated space laser communication system decrease while the BER increase; In the case of strong turbulence intensity, the intensity scintillation and the BER dramatically increase with the increase of transmission distance, and then become saturated; In the condition of turbulence intensity and transmission distance are both constant, the longer the wavelength results in greater C, higher SNR and lower BER. Selecting longer communication wavelength can mitigate the impact of the atmosphere turbulence on the communication system in some extent. © 2013 Copyright SPIE.

Number of references:14

Main heading:Signal to noise ratio

Controlled terms:Atmospheric turbulence - Gaussian beams - Integrated optics - Optical systems - Telecommunication systems

Uncontrolled terms:BER - C - Communication wavelengths - Intensity scintillations - Signaltonoise ratio (SNR) - SNR - Space laser communication - Space optical communication

Classification code:443.1 Atmospheric Properties - 711 Electromagnetic Waves - 716 Telecommunication; Radar, Radio and Television - 716.1 Information Theory and Signal Processing - 717 Optical Communication - 718 Telephone Systems and Related Technologies; Line Communications - 741.3 Optical Devices and Systems

DOI:10.1117/12.2033028

Database:Compendex

Accession number:201437064589

Title:Optical system design of polarization imaging spectrometer for ground-based astronomical observation

Authors:Chang, Lingying (1); Zhao, Baochang (2); Qiu, Yuehong (2); Yao, Dawei (2)

Author affiliation:(1) School of Electronics Engineering, Xi'an University of Post and Telecommunications, Xi'an; Shaanxi, China; (2) Xi'an Institute Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; Shaanxi, China

Corresponding author:Chang, Lingying

Source title:Guangxue Xuebao/Acta Optica Sinica

Abbreviated source title:Guangxue Xuebao

Volume:33

Issue date:December 10, 2013

Publication year:2013

Article number:s222002

Language:Chinese

ISSN:02532239

CODEN:GUXUDC

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:With the development of astrophysics, the astrophysics demands are higher and higher. Astronomical spectral polarization observation can obtain more object information, to provide comprehensive data for further research. On the basis of the 2.16 m astronomical telescope, a polarization imaging spectrometer based on acousto-optic tunable filter is designed, with spectral range of 450~900 nm and the number of spectral channels of 128. As a kind of light splitted element, the acousto-optic tunable filter (AOTF) can obtain image spectral polarization information at the same time. The polarization imaging spectrometer consists of telescope system, acousto-optic imaging system tuned filter, telescope collimation system, compensation, compensation of imaging system and detector, etc. The work principle of AOTF is introduced. Then, design parameters of each optical subsystem are discussed. Finally, the results of optical design are presented. The whole system is achromatized from 0.45 to 0.9 μm with modulated transfer function (MTF) reaching 0.5 under imaging resolution of 32 lp/mm.

Number of references:15

Main heading:Polarization

Controlled terms:Acoustooptical effects - Astrophysics - Imaging systems - Optical design - Spectrometers - Telescopes

Uncontrolled terms:Acousto-optic imaging - Acousto-optic tunable filters - Astronomical observation - Astronomical telescopes - Ground-based telescopes - Imaging spectrometers - Modulated transfer functions - Spectral polarization

Classification code:657 Space Physics - 657.2 Extraterrestrial Physics and Stellar Phenomena - 741 Light, Optics and Optical Devices - 741.1 Light/Optics - 746 Imaging Techniques - 801 Chemistry

DOI:10.3788/AOS201333.s222002

Database:Compendex

Accession number:20140717329701

Title:The Lyman-alpha Imager onboard Solar Polar Orbit Telescope

Authors:Li, Baoquan (1); Li, Haitao (1); Zhou, Sizhong (2); Jiang, Bo (2)

Author affiliation:(1) National Space Science Center, Chinese Academy of Sciences, Bei Jing, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:9042

Monograph title:2013 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments

Issue date:2013

Publication year:2013

Article number:90420Y

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819499608

Document type:Conference article (CA)

Conference name:2013 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments

Conference date:November 17, 2013 - November 19, 2013

Conference location:Beijing, China

Conference code:103967

Sponsor:China Instrument and Control Society (CIS); The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:Solar Polar ORbit Telescope (SPORT) was originally proposed in 2004 by the National Space Science Center, Chinese Academy of Sciences, which is currently being under background engineering study phase in China. SPORT will carry a suite of remote-sensing and in-situ instruments to observe coronal mass ejections (CMEs), solar high-latitude magnetism, and the fast solar wind from a polar orbit around the Sun. The Lyman-alpha Imager (LMI) is one of the key remotesensing instruments onboard SPORT with 45arcmin FOV, 2000mm effective focal length and 1.4arcsec/pixel spatial resolution. The size of LMI is φ150×1000mm, and the weight is less than10kg, including the 7kg telescope tube and 3kg electronic box. There are three 121.6nm filters used in the LMI optical path, so the 98% spectral purity image of 121.6nm can be achieved. The 121.6nm solar Lyman-alpha line is produced in the chromosphere and very sensitive to plasma temperature, plasma velocity and magnetism variation in the chromosphere. Solar Lyman-alpha disk image is an ideal tracker for corona magnetism variation. © 2013 Copyright SPIE.

Number of references:13

Main heading:Orbits

Controlled terms:Linear matrix inequalities - Optical instruments - Remote sensing - SportS - Telescopes

Uncontrolled terms:Chinese Academy of Sciences - Coronal mass ejection - Effective focal lengths - In-situ instruments - LMI - Lyman-alpha Imager - Mass ejection - Polar orbit

Classification code:461.3 Biomechanics, Bionics and Biomimetics - 655.2 Satellites - 657 Space Physics - 731.1 Control Systems - 741.3 Optical Devices and Systems - 921.1 Algebra

DOI:10.1117/12.2035494

Database:Compendex

Accession number:20140717300082

Title:Slow feature analysis for multi-camera activity understanding

Authors:Zhang, Lei (1); Lu, Xiaoqiang (1); Yuan, Yuan (1)

Author affiliation:(1) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xi'an Inst. of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) Graduate Univ. of the Chinese Academy of Science, Beijing 100049, China

Source title:Proceedings - 2013 International Conference on Virtual Reality and Visualization, ICVRV 2013

Abbreviated source title:Proc. - Int. Conf. Virtual Real. Vis., ICVRV

Monograph title:Proceedings - 2013 International Conference on Virtual Reality and Visualization, ICVRV 2013

Issue date:2013

Publication year:2013

Pages:241-244

Article number:6689426

Language:English

ISBN-13:9780769551500

Document type:Conference article (CA)

Conference name:2013 International Conference on Virtual Reality and Visualization, ICVRV 2013

Conference date:September 14, 2013 - September 15, 2013

Conference location:Xi'an, Shaanxi, China

Conference code:103893

Publisher:IEEE Computer Society, 2001 L Street N.W., Suite 700, Washington, DC 20036-4928, United States

Abstract:Multi-camera activity analysis is a key point in video surveillance of many wide-area scenes, such as airports, underground stations, shopping mall and road junctions. On the basis of previous work, this paper presents a new feature learning method based on Slow Feature Analysis (SFA) to understand activities observed across the network of cameras. The main contribution of this paper can be summarized as follows: (1) It is the first time that SFA-based learning method is introduced to multi-camera activity understanding; (2) It presents an evaluation to examine the effectiveness of SFA-based method to facilitate the learning of inter-camera activity pattern dependencies; and (3) It estimates the sensitivity of learning inter-camera time delayed dependency given different training size, which is a critical factor for accurate dependency learning and has not been largely studied by existing work before. Experiments are carried out on a dataset obtained in a trident roadway. The results demonstrate that the SFA-based method outperforms the sate of the art. © 2013 IEEE.

Number of references:11

Main heading:Security systems

Controlled terms:Airport security - Cameras - Information analysis - Learning systems - Subway stations - Video cameras - Virtual reality - Visualization

Uncontrolled terms:Activity analysis - Activity patterns - Feature learning - Learning methods - Slow feature analysis - Slow Feature Analysis(SFA) - Underground stations - Video surveillance

Classification code:971 Social Sciences - 914.1 Accidents and Accident Prevention - 903.1 Information Sources and Analysis - 902.1 Engineering Graphics - 742.2 Photographic Equipment - 723 Computer Software, Data Handling and Applications - 402.2 Public Buildings

DOI:10.1109/ICVRV.2013.46

Database:Compendex

Accession number:20141317521662

Title:Mechanism analysis of Gen III LLL image intensifier GaAs cathode photoelectric emission disability

Authors:Xu, Jiangtao (1); Yan, Lei (1); Cheng, Yaojin (1); Han, Kunye (1); Liu, Beibei (1); Zhang, Taimin (1)

Author affiliation:(1) Science and Technology on Low Light Level Night Vision Laboratory, Xi'an 710119, China; (2) North Night Vision and Technology Co. Ltd, Kunming 650223, China; (3) Northern Optical Group Co. Ltd, 710065, China

Corresponding author:Xu, J.(yanleixida@yahoo.com.cn)

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8912

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Low-Light-Level Technology and Applications

Issue date:2013

Publication year:2013

Article number:891213

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497819

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE); The Optical Society; European Optical Society; European Optical Society

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:The focus of the third generation image intensifier photocathode sensitivity decreases in the GaAs are analyzed, and proposed solutions,experimental results show that the tube microchannel plate(mcp), screen GaAs cathode discharge gas is caused by decreased sensitivity of the main reasons. Paper used two-layer model, and even negative electron affinity(NET) interface barrier theory of the photoelectric cathode drop mechanism was discussed, when the photocathode emission levels of CO adsorption and other harmful gas, chemical adsorption layer of ionic bond formation will lead to production of cathode surface barrier interfaces. Cathode surface adsorption of the pollutants more,the interface barrier becomes thicker, the smaller the electron surface escape probability, when the cathode interface thicker barrier to the electron surface escape is zero, the cathode photoemission end of life. © 2013 SPIE.

Number of references:15

Main heading:Phase interfaces

Controlled terms:Adsorption - Chemical bonds - Electron emission - Gallium arsenide - Image intensifiers (solid state) - Photocathodes - Semiconducting gallium

Uncontrolled terms:Cathode discharge - Chemical adsorption - GaAs photocathodes - Interface barrier - Mechanism analysis - Micro channel plate - Negative electron affinity - Photocathode sensitivity

Classification code:712.1.1 Single Element Semiconducting Materials - 714.1 Electron Tubes - 714.2 Semiconductor Devices and Integrated Circuits - 801.4 Physical Chemistry - 802.3 Chemical Operations - 804 Chemical Products Generally

DOI:10.1117/12.2034316

Database:Compendex

Accession number:20141317521667

Title:Theoretical study on balanced homodyne detection technique in preparation of squeezed states of light

Authors:Qu, Wen-Yan (1); Feng, Fei (1); Song, Jia-Zheng (1); Zhang, Tong-Yi (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, 710119, China; (2) University of Chinese Academy of Sciences, Beijing, 100039, China

Corresponding author:Zhang, T.-Y.(tyzhang@opt.ac.cn)

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8912

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Low-Light-Level Technology and Applications

Issue date:2013

Publication year:2013

Article number:891218

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497819

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE); The Optical Society; European Optical Society; European Optical Society

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:We analyze the balanced homodyne detection technique in the detection of squeezed light, which is controlled by dither locking scheme. We discuss how the balanced homodyne detection efficiency influences the detected degree of squeezing. Also, fluctuation in the relative phase between the local beam and the squeezed light is discussed, since a little phase fluctuation would decrease the detected degree of squeezing greatly. Then, the dither locking technique is studied in detail, which is used to lock the relative phase between the local beam and the squeezed light. The simulation experiments and theoretically results show that the balanced homodyne detection technique and the dither locking scheme are efficient methods to get more accurate degree of squeezing in the preparation of the squeezed states of light. © 2013 SPIE.

Number of references:9

Main heading:Homodyne detection

Controlled terms:Locks (fasteners) - Squeezed light

Uncontrolled terms:Balanced homodyne detection - Dither locking - Locking schemes - Locking technique - Phase fluctuation - Relative phase - Squeezed state - Theoretical study

Classification code:601.3 Mechanisms - 716.1 Information Theory and Signal Processing - 741.1 Light/Optics

DOI:10.1117/12.2034576

Database:Compendex

Accession number:20133016543386

Title:Dynamic focus-position detection technique with array camera in long focal length system

Authors:Zhao, Juanning (1); Dong, Xiaona (1); Da, Zhengshang (1); Li, Hongguang (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an 710119, China; (2) Graduate School, CAS, Beijing 100039, China

Source title:Key Engineering Materials

Abbreviated source title:Key Eng Mat

Volume:552

Monograph title:Advances in Optics Manufacture

Issue date:2013

Publication year:2013

Pages:484-490

Language:English

ISSN:10139826

CODEN:KEMAEY

ISBN-13:9783037856918

Document type:Conference article (CA)

Conference name:Asia Pacific Conference on Optics Manufacture 2012, APCOM 2012

Conference date:August 26, 2012 - August 28, 2012

Conference location:Changchun, China

Conference code:97919

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:A precise detection technique with array camera is discussed for the detection of dynamic focus position in this paper. This technique is well applicable for measuring the focal spot shifting of large and slow lens or optical systems. Two coated wedges are adopted in light path to supply bands of beams, which form the spots matrix on the detector. Focus position shifting can be indirectly obtained from position shifting of the smallest spot on the detector. The technology discussed here is simple and accurate; it also solves the problem that dynamical focal spot position shifting is immeasurable for conventional focal length measureing methods. © (2013) Trans Tech Publications, Switzerland.

Number of references:15

Main heading:Detectors

Controlled terms:Cameras - Manufacture

Uncontrolled terms:Array - Dynamic focus - Focal lengths - Focal spot - Focus positions - Long focal lengths - Measureing - Position shifting

Classification code:537.1 Heat Treatment Processes - 742.2 Photographic Equipment - 914 Safety Engineering

DOI:10.4028/www.scientific.net/KEM.552.484

Database:Compendex

Accession number:20132916509277

Title:Improved Bayer-pattern demosaicking and its hardware design

Authors:Zhu, Bo (1); Wen, De-Sheng (1); Wang, Fei (3)

Corresponding author:Zhu, B.(zhubo@opt.ac.cn)

Source title:Guangdianzi Jiguang/Journal of Optoelectronics Laser

Abbreviated source title:Guangdianzi Jiguang

Volume:24

Issue:6

Issue date:June 2013

Publication year:2013

Pages:1211-1218

Language:Chinese

ISSN:10050086

CODEN:GUJIE9

Document type:Journal article (JA)

Publisher:Board of Optronics Lasers, No. 47 Yang-Liu-Qing Ying-Jian Road, Tian-Jin City, 300380, China

Abstract:In order to improve the quality of demosaicked images and reduce the complexity of its hardware design, an improved Bayer-pattern demosaicking method is presented. Firstly, the second-order Laplacian interpolation filter is adopted to interpolate the missing green samples G&circ;H and G&circ;V at red and blue pixels. And then, in every red or blue location, we calculate the horizontal chrominance values R-G&circ;H, B-G&circ;H and vertical ones R-G&circ;V, B-G&circ;V. Next, we calculate and compare the horizontal chrominance gradient and the vertical one for choosing the missing G&circ;. After the green channel has been reconstructed, we interpolate R&circ; and B&circ; as the average of the four nearest neighbors. By now, the full color image is reconstructed. Experimental results prove that on average the improvement is 15 dB over the bilinear algorithm (BI) in peak signal-to-noise ratio (PSNR) and it appears to produce visually more pleasant color image details with color artifacts greatly suppressed. Furthermore, the computational cost of the proposed algorithm is as simple as the linear algorithm, so the interpolation can be hardware processed in real time. Now, the proposed algorithm is implemented with Xilinx FPGA and used in our camera system, and the perfect restoration quality and effectiveness can meet the requirement of system design.

Number of references:17

Main heading:Hardware

Controlled terms:Algorithms - Color - Field programmable gate arrays (FPGA) - Gradient methods

Uncontrolled terms:Bayer pattern - Bilinear algorithms - Computational costs - Demosaicking - Four-nearest-neighbors - Laplacian interpolations - Peak signal-to-noise ratio - Restoration quality

Classification code:605 Small Tools and Hardware - 721.3 Computer Circuits - 723 Computer Software, Data Handling and Applications - 741.1 Light/Optics - 921 Mathematics - 921.6 Numerical Methods

Database:Compendex

Accession number:20133516678422

Title:Measurement systems of a large-aperture high power laser experiment platform

Authors:Xia, Yanwen (1); Sun, Zhihong (1); Da, Zhengshang (2); Zhao, Junpu (1); Peng, Zhitao (1); Dong, Xiaona (2); Zheng, Kuixing (1); Liu, Hua (1)

Author affiliation:(1) Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan 621900, China; (2) Xi'an Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi 710119, China

Corresponding author:Xia, Y.(xiayanwen1972@163.com)

Source title:Guangxue Xuebao/Acta Optica Sinica

Abbreviated source title:Guangxue Xuebao

Volume:33

Issue:SUPPL.1

Issue date:June 2013

Publication year:2013

Article number:s112003

Language:Chinese

ISSN:02532239

CODEN:GUXUDC

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:The measurement systems of a large-aperture high power laser experiment platform ten kilojoule laser facility are introduced. These involve preamplifier diagnostic module, cavity diagnostic module and main-amplifier diagnostic module. The diagnostic parameters, such as near field, far field alignment, temporal profile, pulse energy and wavefront are measured, and data acquisition, storage and processing are accomplished automatically under the manipulation of control software. The accurate and reliable experimental data are given for the stabilized operation of laser facility.

Number of references:12

Main heading:High power lasers

Controlled terms:Digital storage - Experiments - Measurements

Uncontrolled terms:Diagnostic module - Diagnostic parameter - Far field - Laser facilities - Measurement system - Near fields - Pulse energies - Temporal profile

DOI:10.3788/AOS201333.s112003

Database:Compendex

Accession number:20124715687935

Title:Multi-spectral saliency detection

Authors:Wang, Qi (1); Yan, Pingkun (1); Yuan, Yuan (1); Li, Xuelong (1)

Corresponding author:Yan, P.(pingkun@ieee.org)

Source title:Pattern Recognition Letters

Abbreviated source title:Pattern Recogn. Lett.

Volume:34

Issue:1

Issue date:January 1, 2013

Publication year:2013

Pages:34-41

Language:English

ISSN:01678655

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:Visual saliency detection has been applied in many tasks in the fields of pattern recognition and computer vision, such as image segmentation, object recognition, and image retargeting. However, the accurate detection of saliency remains a challenge. The reasons behind this are that: (1) well-defined mechanism for saliency definition is rarely established; and (2) supporting information for detecting saliency is limited in general. In this paper, a multi-spectrum based saliency detection algorithm is proposed. Instead of only using the conventional RGB information as what existing algorithms do, this work incorporates near-infrared clues into the detection framework. Features of color and texture from both types of image modes are explored simultaneously. When calculating the color contrast, an effective color component analysis method is employed to produce more precise results. With respect to the texture analysis, texton representation is adopted for fast processing. Experiments are done to compare the proposed algorithm with other 11 state-of-the-art algorithms and the results indicate that our algorithm outperforms the others. © 2012 Elsevier B.V. All rights reserved.

Number of references:40

Main heading:Color

Controlled terms:Algorithms - Computer vision - Infrared devices - Object recognition - Textures

Uncontrolled terms:Color component - Color contrast - Detection framework - Image modes - Image retargeting - Multi-spectral - Multi-spectrum - Near Infrared - Saliency - Saliency detection - State-of-the-art algorithms - Texton - Texture analysis - Visual saliency

Classification code:723 Computer Software, Data Handling and Applications - 723.5 Computer Applications - 741 Light, Optics and Optical Devices - 921 Mathematics - 933 Solid State Physics

DOI:10.1016/j.patrec.2012.06.002

Database:Compendex

Accession number:20131616213797

Title:Rapid measurement of spatial azimuth by using polarized light

Authors:Lu, Wei-Guo (1); Wu, Yi-Ming (1); Gao, Li-Min (1); Xiao, Mao-Sen (1); Wang, Hai-Xia (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Lu, W.-G.(optlwg@gmail.com)

Source title:Guangxue Jingmi Gongcheng/Optics and Precision Engineering

Abbreviated source title:Guangxue Jingmi Gongcheng

Volume:21

Issue:3

Issue date:March 2013

Publication year:2013

Pages:539-545

Language:Chinese

ISSN:1004924X

CODEN:GJGOF4

Document type:Journal article (JA)

Publisher:Chinese Academy of Sciences, 140 Renmin Street, Changchun, 130022, China

Abstract:To measure the spatial azimuths of different instruments in the upper and lower planes rapidly, an angle-measuring system based on magneto-optical modulation and a polarization splitter was proposed. An angle-measuring model of the system was deduced by describing the Jones vector of polarized light, and the influence of light source fluctuation on the angle-measuring precision was eliminated through signal processing method of "difference divided by addition". Then, the relationships between the transmittance and the incidence angle, azimuth for the two pathways of optical signals from the Wollaston prism were analyzed, as well as their effects on the measurement results. Furthermore, the dependence of gain differences from optical signal attenuations, device drifts, and circuit performance of opto-electronic elements in two optical paths on the measurement precision were discussed. Finally, a magneto-optical modulation method was proposed to eliminate the difference of transmittances and gain coefficients of the two signals for the achievement of high-precision measurement. The experimental observation demonstrates that the measurement time is 15 s and angle-measuring accuracy is better than 5" within +8~-8°. These results show that the proposed method has some advantages on the fast angular measurement velocity, high precision, and so on.

Number of references:10

Main heading:Light polarization

Controlled terms:Angle measurement - Light modulation - Light sources - Optical signal processing - Polarimeters

Uncontrolled terms:Circuit performance - Experimental observation - High-precision measurement - Magneto-optical - Measurement precision - Measurement results - Polarization splitters - Wollaston prism

Classification code:703 Electric Circuits - 741.1 Light/Optics - 941.3 Optical Instruments - 943.2 Mechanical Variables Measurements

DOI:10.3788/OPE.20132103.0539

Database:Compendex

Accession number:20134817040201

Title:Design of large aperture off-axis catadioptric middle infrared continuous zoom system

Authors:Jiang, Kai (1); Zhou, Sizhong (1); Wang, Yanbin (1); Duan, Jing (1); Zhao, Rui (2); Zhang, Hengjin (1)

Author affiliation:(1) Photoelectric Measurement and Control Technology Research Department, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) Beijing Institute of Tracking and Communication Technology, Beijing 100094, China

Corresponding author:Jiang, K.(jiangkai2008.jj@163.com)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:42

Issue:9

Issue date:September 2013

Publication year:2013

Pages:2467-2471

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:On the basics of a cool 320 × 240 detector with staring focal plane array, a large aperture off-axis catadioptric middle infrared continuous zoom system was designed. The system worked at 3.7-4.8 μm which achieved the zoom of 250 mm to 2 000 mm and F number of 4. The optical system was divided into two segments. Firstly, an off-axis aspheric non-power system as the front system was designed. Then the continuous zoom lens which matched with the non-power system as the back system was designed. Because of the material constraint, the refractive zoom system could not realize large aperture. Coaxal catadioptric zoom system had great block ratio. And three mirrors zoom system could not achieve cold shield efficiency 100%. The off-axis catadioptric zoom system cold account for forenamed limitation. The system cold offer a high resolution and excellent images, and its cold shield efficiency is 100%. The system satisfies the design requirements.

Number of references:8

Main heading:Optical design

Controlled terms:Optical systems

Uncontrolled terms:Cold shield - Continuous zooms - High resolution - Large aperture - Middle infrared - Off-axis - Off-axis aspheric - Zoom systems

Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems

Database:Compendex

Accession number:20132616444944

Title:Fabrication of microstructures in aviation components with a femtosecond laser based on PZT scanning

Authors:Yang, Xiaojun (1); Zhao, Wei (1); Li, Ming (1); Zhao, Hualong (2); Zhang, Huixing (3); Li, Peng (2); Yang, Yong (1); Cheng, Guanghua (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, 710119, China; (2) China KeHan Laser (Fujian) Co. Ltd, Putian 351111, China; (3) Xidian University, Xi'an, 710119, China

Source title:Laser Physics

Abbreviated source title:Laser Phys.

Volume:23

Issue:5

Issue date:May 2013

Publication year:2013

Article number:056001

Language:English

ISSN:1054660X

E-ISSN:15556611

Document type:Journal article (JA)

Publisher:Institute of Physics Publishing, Temple Circus, Temple Way, Bristol, BS1 6BE, United Kingdom

Abstract:Thermal defects and low precision are the main disadvantages of fabricating micro-holes, irregular holes, and micro-slots in thermostable aviation materials. We demonstrate a manufacturing method employing a femtosecond laser and piezoelectric ceramic (PZT). The production process parameters were optimized according to the metallographic and dimensional accuracy of the microstructure, which was measured by phase-contrast microscopy and scanning electron microscopy. The limitations in a conventional aeroengine, such as in the recast layer, recrystallization, and micro-cracks, which degrade the performance and service life, were resolved with a simple, controllable, and commercial method. © 2013 Astro Ltd.

Number of references:17

Main heading:Ultrashort pulses

Controlled terms:Aviation - Microstructure - Piezoelectric ceramics - Scanning electron microscopy

Uncontrolled terms:Aviation components - Dimensional accuracy - Manufacturing methods - Micro holes - Phase-contrast microscopy - Production process - Recast layer - Thermal defects

Classification code:431.1 Air Transportation, General - 741.1 Light/Optics - 744.1 Lasers, General - 812.1 Ceramics - 933 Solid State Physics - 951 Materials Science

DOI:10.1088/1054-660X/23/5/056001

Database:Compendex

Accession number:20132216369970

Title:Ultra-short pulse laser deep drilling of C/SiC composites in air

Authors:Wang, Chunhui (1); Zhang, Litong (1); Liu, Yongsheng (1); Cheng, Guanghua (2); Zhang, Qing (1); Hua, Ke (1)

Author affiliation:(1) Science and Technology on Thermostructure Composite Materials Laboratory, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi 10068, China

Corresponding author:Liu, Y.(yongshengliu@nwpu.edu.cn)

Source title:Applied Physics A: Materials Science and Processing

Abbreviated source title:Appl Phys A

Volume:111

Issue:4

Issue date:June 2013

Publication year:2013

Pages:1213-1219

Language:English

ISSN:09478396

E-ISSN:14320630

CODEN:APAMFC

Document type:Journal article (JA)

Publisher:Springer Verlag, Tiergartenstrasse 17, Heidelberg, D-69121, Germany

Abstract:Ultra-short pulse laser machining is an important finishing technology for high hardness materials. In this study, it demonstrated that the ultra-short pulse laser can be used to drill the film cooling holes and square holes in aero-engine turbine blades made of C/SiC composites. Both the edges and bottoms of the drilling holes are covered with small particles. The following factors have a great effect on drilling holes according to this work: (1) circular holes can be processed only at a relative small helical lines spacing. (2) With the increase of laser scanning speed, the depth of holes reduces while the diameter rarely changes. (3) Through the holes of high aspect ratio can be obtained via high processing power. © 2012 Springer-Verlag Berlin Heidelberg.

Number of references:28

Main heading:Aspect ratio

Controlled terms:Condensed matter physics - Materials science - Physics

Uncontrolled terms:Aero-engine turbines - Film cooling hole - Finishing technology - High aspect ratio - High hardness materials - High processing power - Laser scanning speed - Ultra-short pulse laser

Classification code:931 Classical Physics; Quantum Theory; Relativity - 932 High Energy Physics; Nuclear Physics; Plasma Physics - 933 Solid State Physics - 943 Mechanical and Miscellaneous Measuring Instruments - 951 Materials Science

DOI:10.1007/s00339-012-7377-5

Database:Compendex

Accession number:20133016529908

Title:Ghosting theoretical model of single photon counting imagers with Vernier anode

Authors:Yang, Hao (1); Zhao, Baosheng (2); Yan, Qiurong (2); Liu, Yongan (2)

Author affiliation:(1) Shaanxi Key Laboratory of Optical Information Technology, School of Science, Northwestern Polytechnical University, Xi'an 710072, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Yang, H.(yhao@nwpu.edu.cn)

Source title:Science China: Physics, Mechanics and Astronomy

Abbreviated source title:SCI. CHINA Phys. Mech. Astron.

Volume:56

Issue:8

Issue date:August 2013

Publication year:2013

Pages:1472-1477

Language:English

ISSN:16747348

Document type:Journal article (JA)

Publisher:Science in China Press, 16 Donghuangchenggen North Street, Beijing, PR 100717, China

Abstract:In this paper, the distribution of the phase deviations for the ghosting of Vernier based imagers is provided. The equality of the phase errors is shown. The relationship between the charge noise amplitude of electrodes and the total charge noise amplitude is provided. The relationship between the phase error and the total charge noise amplitude is also provided, which reveals the magnitude of 104 electrons for the ghosting occurrence threshold for the 4-coarse-pixel anode imagers. © 2013 Science China Press and Springer-Verlag Berlin Heidelberg.

Number of references:5

Main heading:Amplitude modulation

Controlled terms:Natural sciences

Uncontrolled terms:Charge noise - ghosting phenomenon - Noise amplitude - Phase deviations - Phase error - Single photon counting - Theoretical models - Total charge

Classification code:716 Telecommunication; Radar, Radio and Television - 801 Chemistry - 931 Classical Physics; Quantum Theory; Relativity - 933 Solid State Physics

DOI:10.1007/s11433-013-5088-3

Database:Compendex

Accession number:20124415617620

Title:Tracking vehicles as groups in airborne videos

Authors:Cao, Xianbin (1); Shi, Zhengrong (3); Yan, Pingkun (4); Li, Xuelong (4)

Author affiliation:(1) School of Electronic Information Engineering, BeiHang University, Beijing 100191, China; (2) The Key Laboratory of Complex Systems and Intelligence Science, Institute of Automation, Chinese Academy of Sciences, 100190, China; (3) School of computer Science and Technology, University of Science and Technology of China, Hefei 230026, China; (4) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China

Corresponding author:Yan, P.(pingkun.yan@opt.ac.cn)

Source title:Neurocomputing

Abbreviated source title:Neurocomputing

Volume:99

Issue date:January 1, 2013

Publication year:2013

Pages:38-45

Language:English

ISSN:09252312

E-ISSN:18728286

CODEN:NRCGEO

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:Airborne vehicle tracking system is receiving increasing attention due to its high mobility, low cost and large surveillance scope. However, tracking multiple vehicles simultaneously on airborne platform is a challenging problem, owing to camera vibration, which causes visible frame-to-frame jitter in the airborne videos and uncertain vehicle motion. To address these problems, a new collaborative tracking framework is proposed in this paper. The framework consists of a two-level tracking process to track vehicles as groups. The higher level builds the relevance network and divides target vehicles into different groups, where the relevance is calculated based on the status information of vehicles obtained from the lower level. The proposed group tracking takes into account the relevance between vehicles and reduces the impact of camera vibration. Experimental results demonstrated that the proposed method has better performance in terms of tracking speed and tracking accuracy compared to other existing approaches based on particle filter and stationary grouping. © 2012 Elsevier B.V.

Number of references:25

Main heading:Vibrations (mechanical)

Controlled terms:Cameras - Distributed computer systems - Interfaces (computer) - Kalman filters - Target tracking - Vehicles

Uncontrolled terms:Airborne platforms - Airborne vehicles - Airborne video - Collaborative tracking - Group tracking - High mobility - Low costs - Multi-target tracking - Particle filter - Target vehicles - Track vehicles - Tracking accuracy - Tracking process - Tracking speed - Vehicle motion

Classification code:931.1 Mechanics - 742.2 Photographic Equipment - 731.1 Control Systems - 722.4 Digital Computers and Systems - 722.2 Computer Peripheral Equipment - 716.2 Radar Systems and Equipment - 432 Highway Transportation

DOI:10.1016/j.neucom.2012.05.026

Database:Compendex

Accession number:20134416936039

Title:Visible and near-infrared optical properties of chalcogenide glass waveguides formed by swift Kr ion irradiation

Authors:Liu, Tao (1); Liu, Chun-Xiao (2); Guo, Hai-Tao (2); Huang, Qing (1); Liu, Peng (1); Guo, Sha-Sha (1); Zhang, Lian (1); Zhou, Yu-Fan (1); Sun, Jian-Rong (3); Wang, Zhi-Guang (3); Wang, Xue-Lin (1)

Author affiliation:(1) School of Physics, State Key Lab. of Crystal Materials and Key Laboratory of Particle Physics and Particle Irradiation, Shandong University, Jinan 250100, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics Precision Mechanics, Chinese Academy of Science (CAS), Xi'an, Shanxi 710119, China; (3) Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China

Corresponding author:Wang, X.-L.(xuelinwang@sdu.edu.cn)

Source title:Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

Abbreviated source title:Nucl Instrum Methods Phys Res Sect B

Volume:314

Issue date:2013

Publication year:2013

Pages:166-169

Language:English

ISSN:0168583X

CODEN:NIMBEU

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:Planar waveguide structures in chalcogenide glass were fabricated with 17 MeV or 150 MeV swift Kr ion irradiation. Images of the polished end faces of the Kr-irradiated chalcogenide glass were measured with a metallographic microscope using reflected polarized light. SRIM 2010 was used to simulate the electronic and nuclear stopping powers for swift Kr ion irradiation. The micro-Raman spectra were measured in air. The near-field intensity distributions were investigated at visible (633 nm) and near-infrared (1300 nm, 1500 nm, 1539 nm and 1620 nm) bands. These intensity distributions make the waveguide candidates for infrared laser devices. The estimated propagation loss of the waveguide fabricated by 150 MeV swift Kr ion irradiation was approximately 4 dB/cm at a wavelength of 633 nm. © 2013 Elsevier B.V. All rights reserved.

Number of references:25

Main heading:Irradiation

Controlled terms:Chalcogenides - Glass - Infrared devices - Optical waveguides - Waveguides

Uncontrolled terms:Chalcogenide glass - Infrared bands - Infrared laser devices - Intensity distribution - Metallographic microscope - Planar waveguide structures - Swift heavy ion irradiation - Visible and near infrared

Classification code:714.3 Waveguides - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 812.3 Glass

DOI:10.1016/j.nimb.2013.04.066

Database:Compendex

Accession number:20135117103924

Title:Space camera image degradation induced by satellite micro-vibration

Authors:Wang, Hong-Juan (1); Wang, Wei (1); Wang, Xin (1); Zou, Gang-Yi (1); Li, Gang (1); Fan, Xue-Wu (1)

Corresponding author:Wang, W.(wangwei@opt.ac.cn)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:42

Issue:10

Issue date:October 2013

Publication year:2013

Pages:1212-1217

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:In order to evaluate the space camera image degradation induced by micro-vibration, an integrated modeling was utilized. During the CCD integrated time, the image motion of dynamical imaging system equaled to static image spot blurring, dynamical imaging evaluation criterion was proposed and dynamical imaging was analyzed. All kinds of disturbance sources were introduced, the finite element model (FEM) of space camera was founded, and the jitter values of optical elements were acquired by dynamic analysis with finite element software. The analysis results were imported to optical design software CODE V, the system spot diagram and MTF were attained, and the image motion was calculated quickly. The integrated modeling which shortens the computational quantity effectively suits to any type of micro-vibration. This method was utilized to simulate the space camera image degradation induced by micro-vibration, and the dynamical imaging evaluation criterion was used to estimate the effects on imaging system. The relationship between micro-vibration and image degradation was achieved, that provides important references for system optimum design and vibration isolation.

Number of references:12

Main heading:Cameras

Controlled terms:Finite element method - Imaging systems - Optical design - Optics

Uncontrolled terms:Finite element software - Image degradation - Imaging evaluation - Integrated modeling - Microvibrations - Optical-design software - Space cameras - Vibration isolations

Classification code:741 Light, Optics and Optical Devices - 741.1 Light/Optics - 742.2 Photographic Equipment - 746 Imaging Techniques - 921.6 Numerical Methods

DOI:10.3788/gzxb20134210.1212

Database:Compendex

Accession number:20135017076802

Title:Mixture gradient detector for subpixel detection

Authors:Huang, Zihan (1); Yuan, Yuan (1); Lu, Xiaoqiang (1)

Author affiliation:(1) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China; (2) Graduate University, Chinese Academy of Science, 19A Yuquanlu, Beijing, 100049, China

Source title:2013 IEEE China Summit and International Conference on Signal and Information Processing, ChinaSIP 2013 - Proceedings

Abbreviated source title:IEEE China Summit Int. Conf. Signal Inf. Process., ChinaSIP - Proc.

Monograph title:2013 IEEE China Summit and International Conference on Signal and Information Processing, ChinaSIP 2013 - Proceedings

Issue date:2013

Publication year:2013

Pages:655-658

Article number:6625423

Language:English

ISBN-13:9781479910434

Document type:Conference article (CA)

Conference name:2013 IEEE China Summit and International Conference on Signal and Information Processing, ChinaSIP 2013

Conference date:July 6, 2013 - July 10, 2013

Conference location:Beijing, China

Conference code:101067

Sponsor:The Institute of Electrical and Electronics Engineers Signal Processing Society (IEEE SPS)

Abstract:Subpixel detection is an important but difficult problem in hy-perspectral image. Due to the small size of the target, only spectral information can be used for detection. Many algorithms have been proposed to reduce this problem, and most of them assume that the distribution of hyperspectral image is multinormal. However, this assumption may not be an appropriate description of the distribution in hyperspectral image. After carefully study the distribution of hyperspectral image, it is concluded that the gradient of noise should also be considered. In this paper a new model is proposed, which assumes that gradient of the noise also follow Gaussian distribution. Based on the given model, two detectors, mixture gradient structured detector (MGSD) and mixture gradient unstructured detector (MGUD) are proposed. The proposed detectors take advantage of the new model, in which the distribution of noise is more accordant with the practical situation. Experiment results demonstrate that in general the proposed detectors perform better than state-of-the-art. © 2013 IEEE.

Number of references:14

Main heading:Detectors

Controlled terms:Data processing - Mixtures - Signal detection - Spectroscopy - Target tracking

Uncontrolled terms:Hyper-spectral images - Hyperspectral Data - Multinormal - Spectral information - Sub pixels - Subpixel detection

Classification code:716.1 Information Theory and Signal Processing - 716.2 Radar Systems and Equipment - 723.2 Data Processing and Image Processing - 801 Chemistry - 802.3 Chemical Operations - 914 Safety Engineering

DOI:10.1109/ChinaSIP.2013.6625423

Database:Compendex

Accession number:20134717010725

Title:Super-resolution microscopy with DMD-based LED-illumination

Authors:Lei, M. (1); Dan, D. (1); Yao, B. (1); Qi, Y. (1); Yan, S. (1); Yang, Y. (1); Gao, P. (1); Ye, T. (1); Zhao, W. (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Lei, M.(leiming@opt.ac.cn)

Source title:Nanophotonics, Nanoelectronics and Nanosensor, N3 2013

Abbreviated source title:Nanophot. Nanoelectron. Nanosensor

Monograph title:Nanophotonics, Nanoelectronics and Nanosensor, N3 2013

Issue date:2013

Publication year:2013

Pages:NSu3C.2

Language:English

ISBN-13:9781557529763

Document type:Conference article (CA)

Conference name:Nanophotonics, Nanoelectronics and Nanosensor, N3 2013

Conference date:May 25, 2013 - May 26, 2013

Conference location:Wuhan, China

Conference code:100562

Publisher:Optical Society of American (OSA), 2010 Massachusetts Ave, NW, Washington, DC, DC 20036, United States

Abstract:Super-resolution optical microscopy has some incomparable comprehensive advantages ver various other microscopic technologies such as electron microscopy, atomic force icroscopy and so on, especially in the study of biological molecules, pathways and events in live cells and tissues. In this report, we present a novel structured illumination microscopy (SIM) based on digital micromirror device (DMD) fringe projection with the low-coherence LED light as illumination source. A 90nm in-plane resolution was achieved with gold nano-particles and BPAE cells. © OSA 2013.

Number of references:15

Main heading:Light emitting diodes

Controlled terms:Nanoelectronics - Nanophotonics - Nanosensors - Optical resolving power

Uncontrolled terms:Biological molecule - Digital micro-mirror device - Fringe projection - Gold nano-particles - Illumination sources - Structured illumination microscopies (SIM) - Super resolution - Super-resolution microscopy

Classification code:462 Biomedical Equipment - 715 Electronic Equipment, General Purpose and Industrial - 741.1 Light/Optics - 761 Nanotechnology - 933 Solid State Physics

Database:Compendex

Accession number:20140917393000

Title:An 90 degree airborne flex camera system

Authors:Zhang, Jian (1); Yan, Aqi (1); Wang, Feng (2); Fan, Zheyan (1); Chen, WeiNing (1); Zhang, Zhi (1); Wu, Dengshan (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an 710119, China; (2) Graduate University of Chinese Academy of Sciences, Beijing 100039, China

Source title:IEEE Region 10 Annual International Conference, Proceedings/TENCON

Abbreviated source title:IEEE Reg 10 Annu Int Conf Proc TENCON

Monograph title:2013 IEEE International Conference of IEEE Region 10, IEEE TENCON 2013 - Conference Proceedings

Issue date:2013

Publication year:2013

Article number:6718913

Language:English

ISSN:21593442

E-ISSN:21593450

CODEN:85QXAA

ISBN-13:9781479928262

Document type:Conference article (CA)

Conference name:2013 IEEE International Conference of IEEE Region 10, IEEE TENCON 2013

Conference date:October 22, 2013 - October 25, 2013

Conference location:Xi'an, Shaanxi, China

Conference code:102719

Sponsor:IEEE Region 10 (Asia Pacific Region); IEEE Xi'an Section; National Natural Science Foundation of China; Northwestern Polytechnical University; Xi'an Jiaotong University

Publisher:Institute of Electrical and Electronics Engineers Inc., 445 Hoes Lane / P.O. Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:It is necessary to obtain high-speed dynamic image at a certain position outside an aircraft cabin such that we can monitor the state of the aircraft and measure some parameters quantitatively. We have to flex optical axis for 90 degree at mounting position. To solve long distance optical path conveying, improve imaging quality, and realize clear image at centre and other areas, secondary image is adopted when we design optical system. With the purpose of adapting to vibration and high-speed wind load on the aircraft, we adopt anti-mechanics and anti-wind load design. Finally, we test and verify the design by simulation and experiment. © 2013 IEEE.

Number of references:16

Main heading:Design

Controlled terms:Aerodynamic loads - Cameras - Loads (forces) - Optical data processing - Optical systems - Wind stress

Uncontrolled terms:Camera systems - Dynamic images - Imaging quality - Optical axis - Optical measurement - secondary image - Test and verify - Wind load

Classification code:402 Buildings and Towers - 408 Structural Design - 421 Strength of Building Materials; Mechanical Properties - 651.1 Aerodynamics, General - 741.3 Optical Devices and Systems - 742.2 Photographic Equipment

DOI:10.1109/TENCON.2013.6718913

Database:Compendex

Accession number:20133516678671

Title:Research on nonlinear error compensation method for interferometers based on tracker

Authors:Zhao, Suwen (1); Zhu, Shaolan (1); Wen, Desheng (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an 710119, China; (2) Graduate School of the Chinese Academy of Sciences, Beijing 100039, China

Corresponding author:Zhao, S.(suwen17zhao@163.com)

Source title:Journal of Information and Computational Science

Abbreviated source title:J. Inf. Comput. Sci.

Volume:10

Issue:11

Issue date:July 20, 2013

Publication year:2013

Pages:3285-3294

Language:English

ISSN:15487741

Document type:Journal article (JA)

Publisher:Binary Information Press, Flat F 8th Floor, Block 3, Tanner Garden, 18 Tanner Road, Hong Kong

Abstract:A dynamic nonlinear error compensation method for the interferometers is proposed to meet the design demands of the tracker. It makes the system reach high precise measurement when the target is moving with high speed. With the passive compensation method of the optical path, part of the errors are eliminated. Thus, the periods of the signals could be counted accurately. A dynamic compensation method is proposed for the displacement in less than one period. By tracking the peak values and valley values of the interference signals in one cycle, the zero offsets error and unequal amplitude error can be compensated; then the quadrature phase shift error could be compensated by tracking the intersection of the two compensated signals. By tracking the signals and renewing the compensation parameters, the signals even with random nonlinear errors can get high-precision subdivision. Experiment results show that the system can get nanometer accuracy even the target is moving at high velocity. The system has better adaptability to different environment and anti-jamming capability. © 2013 Binary Information Press.

Number of references:14

Main heading:Interferometers

Controlled terms:Laser interferometry - Random errors

Uncontrolled terms:Anti-jamming capability - Compensation parameters - Dynamic correction - Laser interferometer - Non-linear error - Precise measurements - Quadrature phase shifts - Subdividing

Classification code:922 Statistical Methods - 941.3 Optical Instruments - 941.4 Optical Variables Measurements

DOI:10.12733/jics20101899

Database:Compendex

Accession number:20140217182468

Title:Cloud3DView: An interactive tool for cloud data center operations

Authors:Yin, Jianxiong (1); Sun, Peng (1); Wen, Yonggang (1); Gong, Haigang (2); Liu, Ming (2); Li, Xuelong (3); You, Haipeng (1); Gao, Jinqi (1); Lin, Cynthia (1)

Author affiliation:(1) Nanyang Tech. Univ., 50 Nanyang Avenue, Singapore 639798, Singapore; (2) Univ. of Elec. Sci. and Tech. of China, Chengdu 610054, China; (3) Center for OPTical IMagery Analysis and Learning, Xi'an 710119, China

Source title:Computer Communication Review

Abbreviated source title:Comput Commun Rev

Volume:43

Issue:4

Monograph title:Proceedings of the SIGCOMM 2013 and Best Papers of the Co-Located Workshops

Issue date:2013

Publication year:2013

Pages:499-500

Language:English

ISSN:01464833

E-ISSN:19435819

CODEN:CCRED2

ISBN-13:9781450320566

Document type:Conference article (CA)

Conference name:Annual Conference of the ACM Special Interest Group on Data Communication on the Applications, Technologies, Architectures, and Protocols for Computer Communication, ACM SIGCOMM 2013

Conference date:August 12, 2013 - August 16, 2013

Conference location:Hong Kong, China

Conference code:101595

Sponsor:ACM SIGCOMM

Publisher:Association for Computing Machinery, General Post Office, P.O. Box 30777, NY 10087-0777, United States

Abstract:The emergence of cloud computing has promoted growing demand and rapid deployment of data centers. However, data center operations require a set of sophisticated skills (e.g., command-line-interface), resulting in a high operational cost. In this demo, to reduce the data center operational cost, we design and build a novel cloud data center management system, based on the concept of 3D gamification. In particular, we apply data visualization techniques to overlay operational status upon a data center 3D model, allowing the operators to monitor the real-time situation and control the data center from a friendly user interface. This demo highlights: (1)a data center 3D view from a First Person Shooter (FPS) camera, (2)a run-time presentation of visualized infrastructures information. Moreover, to improve the user experience, we employ cutting-edge HCI technologies from multi-touch, for remote access to Cloud3DView. © 2013 Authors.

Number of references:2

Main heading:Information management

Controlled terms:Computer architecture - Data visualization - Network architecture - Three dimensional - Three dimensional computer graphics - User interfaces

Uncontrolled terms:Cloud data centers - Data center operations - Design and build - First person shooter - Interactive tool - Rapid deployments - User experience - Visualization technique

Classification code:722 Computer Systems and Equipment - 722.2 Computer Peripheral Equipment - 723 Computer Software, Data Handling and Applications - 903.2 Information Dissemination

DOI:10.1145/2534169.2491704

Database:Compendex

Accession number:20130515974016

Title:Design of visual light and middle infrared zoom optical system

Authors:Du, Yujun (1); Gao, Ming (1); Xin, Weijuan (1); He, Yinghong (2)

Author affiliation:(1) School of Optoelectronic Engineering, Xi'an Technological University, Xi'an 710032, China; (2) Xi'an Institute Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Du, Y.(duyujun168@163.com)

Source title:Applied Mechanics and Materials

Abbreviated source title:Appl. Mech. Mater.

Volume:246-247

Monograph title:Computer-Aided Design, Manufacturing, Modeling and Simulation II

Issue date:2013

Publication year:2013

Pages:413-417

Language:English

ISSN:16609336

E-ISSN:16627482

ISBN-13:9783037855409

Document type:Conference article (CA)

Conference name:2nd International Conference on Computer-Aided Design, Manufacturing, Modeling and Simulation, CDMMS 2012

Conference date:September 21, 2012 - September 23, 2012

Conference location:Chongqing, China

Conference code:95107

Sponsor:National Natural Science Foundation of China (NSFC)

Publisher:Trans Tech Publications, P.O. Box 1254, Clausthal-Zellerfeld, D-38670, Germany

Abstract:In order to achieve wide range for target search and monitor in all-weather, a zoom optical system with long focus length is designed which is used for visual light and middle infrared observation in this paper. In this system, the visible and infrared optical paths share a fixed R-C mirror in the foreside, on whose image surface the parallel plates is used to separate the light beam. Then the dual wavelength band zoom is achieved by two optical transmitted systems whose aperture is 100mm, Zoom range is 300mm~900mm for visual light and 250mm~750mm for middle infrared.This system has stable image and good imaging quality, satisfies the requirements of the application. © (2013) Trans Tech Publications, Switzerland.

Number of references:7

Main heading:Computer aided design

Controlled terms:Computer simulation - Manufacture - Optical design

Uncontrolled terms:Dual wavelength - Image surface - Imaging quality - Light beam - Middle infrared - Optical path - Parallel plates - Target search - Zoom optical system - Zoom systems

Classification code:537.1 Heat Treatment Processes - 723.5 Computer Applications - 741.1 Light/Optics

DOI:10.4028/www.scientific.net/AMM.246-247.413

Database:Compendex

Accession number:20132916502497

Title:Wedge-plate shear for focus-shifting testing in single-shot laser system

Authors:Zhao, Juanning (1); Dong, Xiaona (1); Gao, Limin (1); Li, Hongguang (1)

Author affiliation:(1) Advanced Optical Instrument Research Department, Xi'an Institute of Optics, Precision Mechanics, Xi'an 710119, China; (2) Graduate School of Chinese Academy of Science, Beijing 100039, China

Corresponding author:Zhao, J.(zxychangchun@126.com)

Source title:Applied Optics

Abbreviated source title:Appl. Opt.

Volume:52

Issue:18

Issue date:June 20, 2013

Publication year:2013

Pages:4237-4241

Language:English

ISSN:1559128X

E-ISSN:15394522

CODEN:APOPAI

Document type:Journal article (JA)

Publisher:Optical Society of America, 2010 Massachusetts Ave, NW, Washington, DC, DC 20036-1023, United States

Abstract:A method using a wedge-plate shear shifting system with adjustable accuracy and measuring range is proposed for measuring the focus shifting caused by thermal distortion in a single-shot laser system. Two beam splitter groups are used in this method to precisely split a single beam into multiple beams with different optical path difference. The focus shifting is determined by position change of the minimum spot on the detector. This method is convenient and economic, especially as it powerfully solves the problem of catching focus shifting in an ultrashort time. © 2013 Optical Society of America.

Number of references:20

Main heading:Molecular physics

Controlled terms:Optics

Uncontrolled terms:Laser systems - Measuring ranges - Multiple beam - Optical path difference - Single beam - Single-shot - Thermal distortions - Two beams

Classification code:741.1 Light/Optics - 931.3 Atomic and Molecular Physics

DOI:10.1364/AO.52.004237

Database:Compendex

Accession number:20134316894126

Title:Stereo matching based on low-texture detection and disparity map fusion

Authors:Cao, Xiaoqian (1); Ma, Caiwen (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100039, China

Corresponding author:Cao, X.(caoxiaoqian@opt.cn)

Source title:Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument

Abbreviated source title:Yi Qi Yi Biao Xue Bao

Volume:34

Issue:9

Issue date:September 2013

Publication year:2013

Pages:2074-2079

Language:Chinese

ISSN:02543087

CODEN:YYXUDY

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:In order to eliminate the ambiguity of low-texture region matching, while preserve the matching rate of the texture regions, a novel stereo matching algorithm based on low-texture region detection and disparity map fusion is proposed. The procedure is proceed in the following way: first of all, the low texture region is detected based on the color or the grayscale of the input image; based on this result the improved epipolar distance transformation algorithm is used on the input image pair to improve the distinguishing ability of the pixels in the low-texture regions; and then the window matching algorithm and belief propagation algorithm are adopted to respectively calculate the disparity map for the original input image and the image after the improved epipolar distance transformation. At last, the initial disparity maps calculated from the original and the transformed image pairs are fused according to the detection results of the low-texture regions; and the synchronous optimal matching of the low-texture regions and the texture regions is achieved. The experiments on the low-textured images in the Middlebury image database indicate that the proposed algorithm improves the matching rate by at least 20% compared with the state of art algorithms, almost without increasing the calculation complexity; moreover, the algorithm also has robustness to the matching of the input image pair with luminance variation.

Number of references:16

Main heading:Image matching

Controlled terms:Algorithms - Color matching - Image processing - Image texture - Textures

Uncontrolled terms:Belief propagation algorithm - Distance transformation - Low-texture - Luminance variation - Matching algorithm - Region detection - Stereo matching - Stereo matching algorithm

Classification code:723 Computer Software, Data Handling and Applications - 723.2 Data Processing and Image Processing - 801 Chemistry - 803 Chemical Agents and Basic Industrial Chemicals - 921 Mathematics - 933 Solid State Physics

Database:Compendex

Accession number:20132516438979

Title:Laser contrast enhancement by non-collinear optical Kerr effect of CS <inf>2</inf>

Authors:Wu, Dengke (1); He, Junfang (1); Wang, Yishan (1); Wu, Zhen (1); Zhao, Wei (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, No. 17 Xinxi Road, Xi'an, Shaanxi 710119, China

Corresponding author:He, J.(amilyhjf@163.com)

Source title:Optik

Abbreviated source title:Optik

Volume:124

Issue:16

Issue date:August 2013

Publication year:2013

Pages:2411-2413

Language:English

ISSN:00304026

Document type:Journal article (JA)

Publisher:Urban und Fischer Verlag Jena, P.O. Box 100537, Jena, 07705, Germany

Abstract:A pulse contrast enhancement method for lasers with a low initial contrast is presented based on non-collinear optical Kerr effect of CS<inf>2</inf>. The optical Kerr gate is used as a temporal filter to achieve a "cleaner" laser pulse. A pulse contrast enhancement factor of 104 is expected, with a maximum transmittance of the optical Kerr gate reaching 26%. Measurement of the pulse duration and profile has proved that this method introduces slight changes in the pulse. © 2012 Elsevier GmbH.

Number of references:18

Main heading:Optical Kerr effect

Controlled terms:Nonlinear optics

Uncontrolled terms:Contrast Enhancement - Laser contrasts - Optical Kerr gate - Pulse durations - Temporal filters - Ultrashort Laser

Classification code:741.1 Light/Optics - 741.1.1 Nonlinear Optics

DOI:10.1016/j.ijleo.2012.08.006

Database:Compendex

Accession number:20134717010618

Title:Resolutiesolution performance of the extra ultraviolet telescopes

Authors:Fu, Huai yang (1); Zhou, Si Zhong (1); Jiang, Kai (1); Mei, Chao (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of China Academy of Sciences, Xi'an 710119, P.R., China

Corresponding author:Mei, C.(Cactus4339@126.com)

Source title:Nanophotonics, Nanoelectronics and Nanosensor, N3 2013

Abbreviated source title:Nanophot. Nanoelectron. Nanosensor

Monograph title:Nanophotonics, Nanoelectronics and Nanosensor, N3 2013

Issue date:2013

Publication year:2013

Pages:NSa3A.01

Language:English

ISBN-13:9781557529763

Document type:Conference article (CA)

Conference name:Nanophotonics, Nanoelectronics and Nanosensor, N3 2013

Conference date:May 25, 2013 - May 26, 2013

Conference location:Wuhan, China

Conference code:100562

Publisher:Optical Society of American (OSA), 2010 Massachusetts Ave, NW, Washington, DC, DC 20036, United States

Number of references:8

Main heading:Wavelength

Controlled terms:Equipment testing - Nanoelectronics - Nanophotonics - Nanosensors - Optical systems - Telescopes

Uncontrolled terms:Diffraction limited - Extreme ultraviolet telescopes - Imaging performance - Optical testing system - Rayleigh diffraction limit - Ultraviolet telescopes - Visible wavelengths - Wavelength resolution

Classification code:943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 933 Solid State Physics - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 761 Nanotechnology - 741.1 Light/Optics - 715 Electronic Equipment, General Purpose and Industrial - 462 Biomedical Equipment - 741.3 Optical Devices and Systems

Database:Compendex

Accession number:20131516186783

Title:High contrast ballistic imaging using femtosecond optical Kerr gate of tellurite glass

Authors:Tan, Wenjiang (1); Zhou, Zhiguang (2); Lin, Aoxiang (2); Si, Jinhai (1); Zhan, Pingping (1); Wu, Bin (1); Hou, Xun (1)

Author affiliation:(1) Key Laboratory for Physical Electronics and Devices of the Ministry of Education, Shannxi Key Lab of Information Photonic Technique, Xi'An Jiaotong University, Xianning-xilu 28, Xi'an, 710049, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi'an 710119, China

Corresponding author:Si, J.(jinhaisi@mail.xjtu.edu.cn)

Source title:Optics Express

Abbreviated source title:Opt. Express

Volume:21

Issue:6

Issue date:March 25, 2013

Publication year:2013

Pages:7740-7747

Language:English

E-ISSN:10944087

Document type:Journal article (JA)

Publisher:Optical Society of America, 2010 Massachusetts Ave, NW, Washington, DC, DC 20036-1023, United States

Abstract:We investigated the ballistic imaging technique using femtosecond optical Kerr gate of a tellurite glass. High contrast images of an object hidden behind turbid media were obtained. Compared to the conventional femtosecond optical Kerr gate using fused quartz, the optical Kerr gate using tellurite glass has more capacity to acquire high quality images of the object hidden behind a high optical density turbid medium. The experimental results indicated that the tellurite glass is a good candidate as the optical Kerr material for the ballistic imaging technique due to its large optical nonlinearity. © 2013 Optical Society of America.

Number of references:25

Main heading:Glass

Controlled terms:Ballistics - Imaging techniques - Nonlinear optics - Quartz - Tellurium compounds - Turbidity

Uncontrolled terms:Ballistic imaging - High contrast - High quality images - High-contrast images - Kerr materials - Large optical nonlinearities - Optical Kerr gate - Tellurite glass

Classification code:404.1 Military Engineering - 482.2 Minerals - 741 Light, Optics and Optical Devices - 746 Imaging Techniques - 804.1 Organic Compounds - 812.3 Glass

DOI:10.1364/OE.21.007740

Database:Compendex

Accession number:20135117103912

Title:High power operation of a tm-doped fiber laser with distributed pump configuration

Authors:Long, Jing-Yu (1); Shen, De-Yuan (1); Wang, Yi-Shan (1); Zhao, Wei (1); Guo, Cheng-Zheng (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) Xi'an Institute of Applied Optics, Xi'an 710065, China; (3) University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Shen, D.-Y.(shendy@opt.ac.cn)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:42

Issue:10

Issue date:October 2013

Publication year:2013

Pages:1147-1151

Language:English

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:In order to realize the high-power operation of the Tm doped silica fiber laser, there are two issues to be resolved. One is how to couple the pump light with low beam quality into the inner cladding of gain fiber efficiently, the other is on thermal management of gain fiber. For an efficient coupling, firstly the output beam of high power LD modules were collimated to reduce their beam diverge in the plane parallel to the array by use of a telescope system consisting of cylindrical aspheric lenses, and then the collimated beams were cut with splitters. The beam parameter in the plane parallel to the array was optimized to 84 mm&middotmrad (BPP<inf>x</inf>) after the reshaping, and a coupling efficiency of 70% was achieved by this means. A series connection structures consisting of two sections of Tm fiber with identical length were fabricated to increase available pump power and reduce the heat generation along the fiber ends, which achieved a total available pump power up to 580 W. With regard to the thermal management, each end section (250 mm long) of fibers was embedded in a V groove in a water cooled aluminum heat sink. Based on this configuration a continuous-wave output power of up to 280 W operating at 2015 nm was obtained for 6.4 m-long gain fiber, corresponding to a slope efficiency of 55.6% with respect to the launched pump power. The experimental results indicate that the special reshaping and laser configuration can improve pump coupling efficiency, reduce thermal loading and give more even axial temperature distribution along the gain fibers.

Number of references:16

Main heading:Fibers

Controlled terms:Efficiency - Fiber lasers - Temperature control

Uncontrolled terms:Beam-shaping - Coupling efficiency - High-power operation - Laser configuration - Launched pump power - Pump configuration - Series connection structures - Tm-doped fiber laser

Classification code:731.3 Specific Variables Control - 741.1.2 Fiber Optics - 812 Ceramics, Refractories and Glass - 817 Plastics and Other Polymers: Products and Applications - 913.1 Production Engineering

DOI:10.3788/gzxb20134210.1147

Database:Compendex

Accession number:20131516204301

Title:Design of RF source based on Direct Digital Synthesizer

Authors:Liu, Hui (1); Qiu, Yuehong (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, China; (2) Graduate School of the Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Liu, H.(goldwings168@163.com)

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8759

Monograph title:Eighth International Symposium on Precision Engineering Measurements and Instrumentation

Issue date:2013

Publication year:2013

Article number:87591O

Language:English

ISSN:0277786X

CODEN:PSISDG

ISBN-13:9780819495501

Document type:Conference article (CA)

Conference name:8th International Symposium on Precision Engineering Measurements and Instrumentation

Conference date:August 8, 2012 - August 11, 2012

Conference location:Chengdu, China

Conference code:96463

Sponsor:International Committee on Measurements and Instrumentation; National Natural Science Foundation of China; Chinese Society for Measurement; China Instrument and Control Society

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:A new Radio Frequency (RF) source based on Direct Digital Synthesizer (DDS) is presented in this paper, to improve the performance of the Sound-light tunable filter. A DDS chip called AD9959 is used to produce RF signal. The AD9959 consists of four DDS cores that provide independent frequency, phase, and amplitude control on each channel, and FPGA is used to control AD9959, to ensure a high accurate signal source with multiple signal mode and four channels output is designed. This paper introduces the implementation of system including software and hardware. The test results show that the RF source has 0-200MHz bandwidth and resolution, stability and a series of functions fully realize the scheduled target. © 2013 SPIE.

Number of references:9

Main heading:Measurements

Controlled terms:Field programmable gate arrays (FPGA) - Precision engineering

Uncontrolled terms:AD9959 - Bandwidth and resolutions - DDS - Direct digital synthesizer - Multi channel - Radio frequency source - RF sources - Software and hardwares

Classification code:721.3 Computer Circuits - 761 Nanotechnology - 941 Acoustical and Optical Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments

DOI:10.1117/12.2014925

Database:Compendex

Accession number:20132416421104

Title:Design and simulation of attitude determination and control subsystem of cubesat using extended kalman filtering and linear quadratic gain controller

Authors:Han, Xiao (1); Yang, Xiao Jun (1); Abbas, Naqvi Najam (2)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, China; (2) Northwestern Polytechnical University, Xi'an, China

Source title:Advanced Materials Research

Abbreviated source title:Adv. Mater. Res.

Volume:694 697

Monograph title:Manufacturing Process and Equipment

Issue date:2013

Publication year:2013

Pages:1582-1586

Language:English

ISSN:10226680

ISBN-13:9783037856932

Document type:Conference article (CA)

Conference name:4th International Conference on Manufacturing Science and Engineering, ICMSE 2013

Conference date:March 30, 2013 - March 31, 2013

Conference location:Dalian, China

Conference code:97229

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:This paper describes an integral scheme of the design and simulation of the Attitude Determination and Control Subsystem (ADCS) of CubeSat. CubeSat is an educational low-cost, cube-shaped Pico spacecraft. Attitude Determination (AD) is the problem of expressing the orientation of a spacecraft with respect to a given coordinate system. Three axis magneto-resistive digital magnetometer is selected as an attitude sensor. The International Geomagnetic Reference Field (IGRF) is used as reference for magnetometer to obtain attitude information. An enhanced orbit estimate/propagator is implemented to provide position information to IGRF model. Satellite environmental torque is modeled along with satellite kinematics and dynamics. Attitude estimation is done using Extended Kalman Filter (EKF) while the magnetic coils are used as actuators. Attitude Control is applied using Linear Quadratic Regulation (LQR) Controller. The designed ADCS is implemented in Matlab/Simulink. © (2013) Trans Tech Publications, Switzerland.

Number of references:10

Main heading:Extended Kalman filters

Controlled terms:Attitude control - Geomagnetism - Kalman filters - Linear control systems - Magnetic actuators - Magnetometers - Spacecraft

Uncontrolled terms:ADCS - Attitude determination and control subsystems - Cubesat - Extended Kalman filtering - International geomagnetic reference fields - Linear quadratic regulations - LQR control - MATLAB /simulink

Classification code:961 Systems Science - 942.3 Magnetic Instruments - 731.1 Control Systems - 704 Electric Components and Equipment - 656.1 Space Flight - 655.1 Spacecraft, General - 481.3.2 Earth Magnetism and Terrestrial Electricity

DOI:10.4028/www.scientific.net/AMR.694-697.1582

Database:Compendex

Accession number:20134817038443

Title:A 1319nm diode-side-pumped Nd:YAG laser Q-switched with graphene oxide

Authors:Zhang, Ling (1); Yu, Haijuan (1); Yan, Shilian (1); Zhao, Weifang (1); Sun, Wei (1); Yang, Yingying (1); Wang, Lirong (1); Hou, Wei (1); Lin, Xuechun (1); Wang, Yonggang (2); Wang, Yishan (2)

Author affiliation:(1) Laboratory of All-Solid-State Light Sources, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Lin, X.(xclin@semi.ac.cn)

Source title:Journal of Modern Optics

Abbreviated source title:J. Mod. Opt.

Volume:60

Issue:15

Issue date:2013

Publication year:2013

Pages:1287-1289

Language:English

ISSN:09500340

E-ISSN:13623044

CODEN:JMOPEW

Document type:Journal article (JA)

Publisher:Taylor and Francis Ltd., 4 Park Square, Milton Park, Abingdon, Oxfordshire, OX14 4RN, United Kingdom

Abstract:We have demonstrated a diode-side-pumped Q-switched Nd:YAG laser operating at 1319 nm with a saturable absorber of graphene oxide fabricated by the vertical evaporation method. The 1319 nm Q-switched laser pulses were realized with average output power of 820 mW, pulse width of 2 μs and repetition rate of 35 kHz. The pulse energy and peak power were 23.4 μJ and 11.7W, respectively when the optical pump power was 232W. The experimental results indicate that graphene oxide is an effective saturable absorber for Q-switched lasers. © 2013 Taylor & Francis.

Number of references:22

Main heading:Neodymium lasers

Controlled terms:Graphene - Optical pumping - Q switching - Saturable absorbers

Uncontrolled terms:1319 nm - Average output power - Diode-side-pumped - Evaporation method - Graphene oxides - ND : YAG lasers - Q switched Nd:YAG laser - Repetition rate

Classification code:741.1 Light/Optics - 744 Lasers - 761 Nanotechnology - 804 Chemical Products Generally

DOI:10.1080/09500340.2013.837975

Database:Compendex

Accession number:20134817032714

Title:Induced current measurement in bridgewire EED through infrared optical fiber image bundle

Authors:Xin, Liwei (1); Wang, Tao (1); Tian, Jinshou (1); Yin, Fei (1); Hu, Yanan (1); Song, Zhenyu (2); Yang, Jin (1); Yin, Jingzhi (2)

Author affiliation:(1) State Key Laboratory of Transient Optics and Technology, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China

Corresponding author:Wang, T.(wangtao@opt.ac.cn)

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8905

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Laser Sensing and Imaging and Applications

Issue date:2013

Publication year:2013

Article number:890518

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497741

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE); The Optical Society; European Optical Society; Chinese Society of Astronautics

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:While bridgewire electroexplosive device (EED) works in electromagnetic environment, conventional methods can introduce electromagnetism interference. A new method of measuring the induced current in EED is proposed in this article. It bases on infrared imagingto detect the inducting current from long distance and non-contact. The infrared optical fiber image bundle coupling with infrared CCD detector is used to detect the infrared images.At first, the thermal field images are acquired by infrared CCD detector. Then the value of weak induced current of corresponding bridgewire is further determined according to the relations of gray scale values and temperature, temperature and current. The experiment results show that bridgewire current is accurately measured by this method. This method offers a new way to evaluate electromagnetic effect of EED. © 2013 SPIE.

Number of references:6

Main heading:Detectors

Controlled terms:Induced currents - Optical fibers

Uncontrolled terms:CCD detectors - Conventional methods - Electroexplosive devices - Electromagnetic environments - Electromagnetism interference - Fiber image bundles - Gray scale values - Thermal field

Classification code:701.1 Electricity: Basic Concepts and Phenomena - 741.1.2 Fiber Optics - 914 Safety Engineering

DOI:10.1117/12.2033704

Database:Compendex

Accession number:20133016543311

Title:Target optimization design of cam curve in zoom system

Authors:Ning, Chenwei (1); Zhong, Caojian (1); Tao, Yanghong (1); Jian, Zhang (1); Yuan, Fanzhe (1); Li, Wu (1); Hui, Zhang (1); Jie, Leiyang (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an 710119, China

Source title:Key Engineering Materials

Abbreviated source title:Key Eng Mat

Volume:552

Monograph title:Advances in Optics Manufacture

Issue date:2013

Publication year:2013

Pages:44-51

Language:English

ISSN:10139826

CODEN:KEMAEY

ISBN-13:9783037856918

Document type:Conference article (CA)

Conference name:Asia Pacific Conference on Optics Manufacture 2012, APCOM 2012

Conference date:August 26, 2012 - August 28, 2012

Conference location:Changchun, China

Conference code:97919

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:Zoom lens has been widely applied in all kinds of fields, and its cam optimization is the key to actualizing the performance of its optical design and the zooming process, while the smoothness and speediness of zooming movement must be considered for military and civilian use. With the incremental use of environmental requirements, it puts forward higher requests to the cam performance of lens. In order to guarantee that the cam has good stiffness in the case of vibration and shock environment, in the process of cam design, it not only requires curve optimal, but also needs to consider influence on the performance which is caused by reduced cam stiffness of the zoom system. A fine curve can ensure that the cam pressure angle α is smaller, and to ensure the cam follower maintains the uniform velocity and smaller acceleration in zooming process, and make the zoom system produce little impact, and whole zooming process smooth and fluent, it can reduce the zoom systems driving moment M, and can ensure the stability imaging of the zoom system. Good cam stiffness K can make the zoom lens have good stability in vibration environment, and make sure that the image quality. M and K respectively up to the pressure angle α of zoom curve and the rotation angle θ of zoom curve in cam. In the new cam design process, considering the whole influence on the performance that is caused by K and M to cam, we construct the function expressions K = f (α, θ) and M = f (α, θ), and then, build target optimization function with K and M, optimize the relationship between pressure angle α of zoom curve and rotation angle θ, looking for the optimal value for the stiffness K and the cam system driving moment M , and improve overall performance of the zoom cam . © (2013) Trans Tech Publications, Switzerland.

Number of references:9

Main heading:Cams

Controlled terms:Curve fitting - Manufacture - Optical design - Optimization - Stiffness

Uncontrolled terms:Cam curve - Optimization design - Pressure angles - Rotation angles - Zoom systems

Classification code:951 Materials Science - 921 Mathematics - 741.1 Light/Optics - 601.3 Mechanisms - 537.1 Heat Treatment Processes - 422 Strength of Building Materials; Test Equipment and Methods - 421 Strength of Building Materials; Mechanical Properties

DOI:10.4028/www.scientific.net/KEM.552.44

Database:Compendex

Accession number:20132616444999

Title:Experimental investigations of pulse shape control in passively mode-locked fiber lasers with net-normal dispersion

Authors:Wang, L.R. (1); Han, D.D. (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Source title:Laser Physics

Abbreviated source title:Laser Phys.

Volume:23

Issue:3

Issue date:March 2013

Publication year:2013

Article number:035106

Language:English

ISSN:1054660X

E-ISSN:15556611

Document type:Journal article (JA)

Publisher:Institute of Physics Publishing, Temple Circus, Temple Way, Bristol, BS1 6BE, United Kingdom

Abstract:Pulse shape control in passively mode-locked fiber lasers with net-normal dispersion is investigated experimentally. Three kinds of pulses with different spectral and temporal shapes are observed, and their pulse-shaping mechanisms are discussed. After a polarization-resolved system external to the cavity, the maximum intensity differences of the two polarization components for the rectangular-spectrum (RS), Gaussian-spectrum (GS), and super-broadband (SB) pulses are measured as &sim;20 dB, &sim;15 dB, and &sim;1 dB, respectively. It is suggested that the equivalent saturable absorption effect plays an increasingly important role from the RS to GS and then to SB pulses in the pulse-shaping processes, while the spectral filtering effect declines. This work could help in systematically understanding pulse formation and proposing guidelines for the realization of pulses with better performance in fiber lasers. © 2013 Astro Ltd.

Number of references:48

Main heading:Pulse shaping

Controlled terms:Fiber lasers - Mode-locked fiber lasers - Passive mode locking

Uncontrolled terms:Better performance - Experimental investigations - Maximum intensities - Passively mode-locked fiber lasers - Polarization components - Pulse shape control - Saturable absorption effects - Spectral filtering

Classification code:713.4 Pulse Circuits - 744.1 Lasers, General - 744.4 Solid State Lasers

DOI:10.1088/1054-660X/23/3/035106

Database:Compendex

Accession number:20132816484071

Title:Numerical simulation on the type IV creep failure of dissimilar welded joint between T91 and HR3C heat-resistant steels

Authors:Zhang, Jianqiang (1); Zhang, Guodong (1); Yao, Bingyin (2); Li, Taijiang (2); Liu, Fuguang (2)

Author affiliation:(1) Key Laboratory of Ministry of Education for Hydraulic Transients, Wuhan University, Wuhan 430072, China; (2) Xi'an Thermal Power Research Institute Co., Ltd., Xi'an 710032, China

Corresponding author:Zhang, G.(gdzhang128@163.com)

Source title:Jixie Gongcheng Xuebao/Journal of Mechanical Engineering

Abbreviated source title:Jixie Gongcheng Xuebao

Volume:49

Issue:12

Issue date:June 20, 2013

Publication year:2013

Pages:78-83

Language:Chinese

ISSN:05776686

CODEN:CHHKA2

Document type:Journal article (JA)

Publisher:Editorial Office of Chinese Journal of Mechanical, 22 Baiwanzhuang Dajie, Beijing, 100037, China

Abstract:Creep finite element method(FEM) model of dissimilar welded joint between martensitic heat-resistant steel (T91) and austenitic(HR3C) is established. The maximum principal stress, von Mises equivalent stress and stress triaxiality is simulated at 600°C and in the inner pressure of 42.26 MPa. The results show that the peaks of the maximum principal stresses are in the interface of weld/T91 and HR3C/weld in inner surface, and in the vicinity of weld/T91 interface in the distance of 2.96 mm away from outer surface. The creep cavities are ease to form in the weld/T91 interface in inner surface and in the place of 2.96 mm away from outer surface. In turn, in the weld/T91 interface of 1.29 mm away from inner surface, outer surface and 2.96 mm away from outer surface. The higher von Mises equivalent stress is in the weld/T91 interface of inner surface, and cavities are ease to expand. In turn, in the weld/T91 interface of 1.29 mm away from inner surface, outer surface and 2.96 mm away from outer surface. The stress triaxiality in the weld/T91 interface of inner surface is quit high, creep cavities are ease to link into interfacial creep cracks. And that, the stress triaxiality in the fine grain heat affected zone(HAZ) of 1.29 mm away from inner surface and 2.96 mm way from outer surface are also quit high, accordingly, creep cavities are ease to take the form of type IV creep crack. Therefore, using stress triaxiality to describing creep cavity expansion and crack development of the weld/T91 interface and fine grain HAZ is more reasonable for dissimilar welded joint between T91 and HR3C, and the numerical simulating results are good in agreement with those of experiment. © 2013 Journal of Mechanical Engineering.

Number of references:15

Main heading:Martensitic steel

Controlled terms:Austenite - Cracks - Creep - Heat affected zone - Shear stress - Welded steel structures - Welding

Uncontrolled terms:Austenitic heat-resistant steels - Heat-resistant steel - Maximum principal stress - Stress triaxiality - Von Mises equivalent stress

Classification code:421 Strength of Building Materials; Mechanical Properties - 538.2 Welding - 545.3 Steel

DOI:10.3901/JME.2013.12.078

Database:Compendex

Accession number:20134016793580

Title:Resonant modes in photonic multiple quantum well structures with single-negative materials

Authors:Kang, Yongqiang (1); Zhang, Chunmin (1)

Author affiliation:(1) School of Science, Ministry of Education Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'An Jiaotong University, Xi'an 710049, China; (2) School of Physics Science and Electronics, Shanxi Datong University, Datong, Shanxi 037009, China; (3) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710048, China

Corresponding author:Zhang, C.(zcm@mail.xjtu.edu.cn)

Source title:Optik

Abbreviated source title:Optik

Volume:124

Issue:22

Issue date:November 2013

Publication year:2013

Pages:5430-5433

Language:English

ISSN:00304026

Document type:Journal article (JA)

Publisher:Urban und Fischer Verlag Jena, P.O. Box 100537, Jena, 07705, Germany

Abstract:A type of photonic multiple quantum well (PMQWs) structure made of two different photonic crystals (PCs) with two kinds of single-negative materials is investigated. It is demonstrated by transfer matrix method that omnidirectional resonance modes are generated. The number of the resonance modes can be controlled by adjusting the periodic structure of the constituents. The resonance tunneling modes are weak dependence on incident angle and the scaling of the barrier photonic crystals. When the losses are taken into account, the effects of the losses coming from ENG media and MNG media on the resonance modes are striking difference. © 2013 Elsevier GmbH.

Number of references:21

Main heading:Semiconductor quantum wells

Controlled terms:Photonic crystals - Resonance - Transfer matrix method

Uncontrolled terms:Incident angles - Multiple quantum-well structures - Photonic quantum-well - Resonance mode - Resonance tunneling - Resonant mode - Single-negative materials - Weak dependences

Classification code:701 Electricity and Magnetism - 714.2 Semiconductor Devices and Integrated Circuits - 921 Mathematics - 933.1 Crystalline Solids

DOI:10.1016/j.ijleo.2013.03.143

Database:Compendex

Accession number:20134216860607

Title:Blind equalization algorithm of wireless optical communication using subcarrier modulation over turbulence channel

Authors:Chen, Dan (1); Ke, Xi-Zheng (1); Li, Jian-Xun (1)

Author affiliation:(1) School of Automation and Information, Xi'an University of Technology, Xi'an 710048, China; (2) State Key Laboratory of Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Chen, D.(chdh@xaut.edu.cn)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:42

Issue:9

Issue date:September 2013

Publication year:2013

Pages:1025-1030

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:Blind equalization system model is established with atmospheric turbulence time-varying channel. Under different scintillation distribution conditions, performances of two kinds of adaptive blind equalization algorithms are compared such as convergence, mean square error (MSE) and stability, and clustering in constellation of wireless optical subcarrier signal are analyzed. With the increasing of turbulence intensity, variable step-size constant modulus algorithm (CMA) algorithm based MSE has faster convergence, smaller MSE but poor stability, and scale factor must be decreased to ensure convergence compared with CMA algorithm. Meanwhile, compared with Gaussian channel, under the same signal-to-noise ratio, iterative step length factor and scale factor under the turbulence channel is smaller, but mean square error is bigger than in Gaussian channel. The simulation results show that two kinds of algorithms can effectively improve the convergence of constellation diagram, and have important significance in improving detection rate of constellation diagram.

Number of references:14

Main heading:Blind equalization

Controlled terms:Algorithms - Atmospheric turbulence - Iterative methods - Mean square error - Modulation - Optical communication

Uncontrolled terms:Constant modulus algorithms - Constellation diagrams - Sub-carrier modulations - Variable step size - Wireless optical communication

Classification code:921.6 Numerical Methods - 921 Mathematics - 731.1 Control Systems - 723 Computer Software, Data Handling and Applications - 718 Telephone Systems and Related Technologies; Line Communications - 717.1 Optical Communication Systems - 717 Optical Communication - 716 Telecommunication; Radar, Radio and Television - 443.1 Atmospheric Properties

DOI:10.3788/gzxb20134209.1025

Database:Compendex

Accession number:20132516438951

Title:Numerical modeling and design of mid-infrared FBG with high reflectivity

Authors:Chen, Yu (1); Li, Jianfeng (1); Yang, Yi (1); Chen, Ming (1); Li, Jing (1); Luo, Hongyu (1)

Author affiliation:(1) School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu 610054, Sichuan, China; (2) State Key Laboratory of Transient Optics and Photonics, Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Li, J.(lijianfeng@uestc.edu.cn)

Source title:Optik

Abbreviated source title:Optik

Volume:124

Issue:16

Issue date:August 2013

Publication year:2013

Pages:2565-2568

Language:English

ISSN:00304026

Document type:Journal article (JA)

Publisher:Urban und Fischer Verlag Jena, P.O. Box 100537, Jena, 07705, Germany

Abstract:Based on the coupled-mode equations and transfer matrix theory, the reflective spectrums of a silica FBG centered at 1.9 μm and a fluoride FBG centered at 2.8 μm with different length and refractive index perturbation were calculated, respectively. The results show that the peak reflectivity and the spectrum width increase and decrease with the increasing FBG length, respectively. An increase in refractive index disturbance quantity results in the increase of both reflective peak and spectrum width. Above 99% reflectivity with the spectrum width of &sim;0.6 nm can be achieved for the silica FBG at 1.9 μm when the length and refractive index perturbation are chosen in the range of 4.3-6.4 mm and 4.32 × 10-4-5.36 × 10-4, respectively. For the fluoride FBG at 2.8 μm, above 99% of the reflectivity with the spectrum width of &sim;0.75 nm can be achieved when the length and disturbance of refractive index are in the range of 6.0-8.0 mm and 4.53 × 10-4-6.0 × 10-4. © 2012 Elsevier GmbH.

Number of references:12

Main heading:Fiber Bragg gratings

Controlled terms:Fiber lasers - Fluorine compounds - Infrared devices - Reflection - Refractive index - Silica - Transfer matrix method

Uncontrolled terms:Coupled mode equation - FBG - Fiber gratings - Fluoride fibers - Midinfrared - Reflective spectrum - Refractive-index perturbation - Transfer-matrix theory

Classification code:741 Light, Optics and Optical Devices - 804.1 Organic Compounds - 812 Ceramics, Refractories and Glass - 921 Mathematics

DOI:10.1016/j.ijleo.2012.07.016

Database:Compendex

Accession number:20133616702282

Title:Object tracking based on integrating the Genetic algorithm with complex method

Authors:Dong, Xiaokun (1); Cao, Jianzhong (1); Yang, Hongtao (1); Yu, Zhi (1); Guo, Huinan (1); Liu, Chen (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics Chinese Academy of Sciences, Xi'an, 710119, China

Source title:Proceedings of the 2013 International Conference on Intelligent Control and Information Processing, ICICIP 2013

Abbreviated source title:Proc. Int. Conf. Intell. Control Inf. Process., ICICIP

Monograph title:Proceedings of the 2013 International Conference on Intelligent Control and Information Processing, ICICIP 2013

Issue date:2013

Publication year:2013

Pages:205-209

Article number:6568068

Language:English

ISBN-13:9781467362481

Document type:Conference article (CA)

Conference name:2013 4th International Conference on Intelligent Control and Information Processing, ICICIP 2013

Conference date:June 9, 2013 - June 11, 2013

Conference location:Beijing, China

Conference code:98950

Sponsor:University of Illinois at Chicago; National Natural Science Foundation of China

Publisher:IEEE Computer Society, 2001 L Street N.W., Suite 700, Washington, DC 20036-4928, United States

Abstract:Traditional Genetic algorithm in target tracking process, is quite effective in the global scope to search target position. However, once the background color and light intensity change. To monitor the state of the target depth movement is often difficult to locate the target accurately. However, complex method can make up for the lack of Genetic algorithms. In view of those, this paper integrates Complex method with traditional Genetic algorithms, uses the center coordinates of the candidate target and scaling coefficient to adjust the focus size as a parameter encoding, and takes the similarity between the target area and the target template as a fitness function, then searches the object in the overall and local scope in turn. The experiments show that the fusion algorithm can achieve accurate tracking of the position and the size of the target. © 2013 IEEE.

Number of references:9

Main heading:Target tracking

Controlled terms:Data processing - Genetic algorithms - Intelligent control

Uncontrolled terms:Accurate tracking - Complex methods - Edge orientation histograms - Fitness functions - Fusion algorithms - Scaling coefficients - Tracking process - Traditional genetic algorithms

Classification code:716.2 Radar Systems and Equipment - 723 Computer Software, Data Handling and Applications - 921 Mathematics

DOI:10.1109/ICICIP.2013.6568068

Database:Compendex

Accession number:20130916074010

Title:Eyewear-style three-dimensional endoscope derived from microstructured polymer fiber with the function of image transmission

Authors:Kong, De-Peng (1); Wang, Li-Li (1); He, Zheng-Quan (1); Chu, Jiu-Rong (2); Ma, Tian (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) Production and Application of Plastic Optical Fiber National and Local Engineering Laboratory, Sichuan Huiyuan Plastic Optical Fiber Co., Ltd., Chongzhou Industrial Development Zone, Chengdu 611230, China

Corresponding author:Wang, L.-L.(liliwang@opt.ac.cn)

Source title:Chinese Physics B

Abbreviated source title:Chin. Phys.

Volume:22

Issue:2

Issue date:February 2013

Publication year:2013

Article number:020701

Language:English

ISSN:16741056

Document type:Journal article (JA)

Publisher:Institute of Physics Publishing, Temple Circus, Temple Way, Bristol, BS1 6BE, United Kingdom

Abstract:A method of fabricating multi-core polymer image fiber is proposed. Image fiber preform is fabricated by stacking thousands of polymer fibers each with a 0.25-mm diameter orderly in a die by only one step. The preform is heated and stretched into image fiber with an outer diameter of 2 mm. Then a portable eyewear-style three-dimensional (3D) endoscope system is designed, fabricated, and characterized. This endoscopic system is composed of two graded index lenses, two pieces of 0.35-m length image guide fibers, and a pair of oculars. It shows good flexibility and portability, and can provide the depth information accordingly. © 2013 Chinese Physical Society and IOP Publishing Ltd.

Number of references:14

Main heading:Three dimensional

Controlled terms:Endoscopy - Fibers - Polymers - Preforming

Uncontrolled terms:Depth information - Endoscopic systems - Graded index lens - Image fiber - Image guides - Multi core - Outer diameters - Polymer fiber

Classification code:461.6 Medicine and Pharmacology - 535.2.2 Metal Forming Practice - 812 Ceramics, Refractories and Glass - 815.1 Polymeric Materials - 817 Plastics and Other Polymers: Products and Applications - 902.1 Engineering Graphics

DOI:10.1088/1674-1056/22/2/020701

Database:Compendex

Accession number:20131716226351

Title:Energy-saving object detection by efficiently rejecting a set of neighboring sub-images

Authors:Pan, Jing (1); Pang, Yanwei (2); Zhang, Kun (2); Yuan, Yuan (3); Wang, Kongqiao (4)

Author affiliation:(1) School of Electronic Engineering, Tianjin University of Technology and Education, Tianjin 300222, China; (2) School of Electronic Information Engineering, Tianjin University, Tianjin 300072, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, Shanxi, China; (4) Nokia Research Center, Beijing 100176, China

Corresponding author:Pan, J.(jingpan23@gmail.com)

Source title:Signal Processing

Abbreviated source title:Signal Process

Volume:93

Issue:8

Issue date:August 2013

Publication year:2013

Pages:2205-2211

Language:English

ISSN:01651684

CODEN:SPRODR

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:Object detection is crucial for multimedia processing such as image understanding and video analysis. Due to the large amount of images and videos and the limited computational resource, effective and efficient object detection is challenging. Although much effort has been done to develop fast object detection algorithms, little work was concentrated on energy-saving algorithms. Even two detection algorithms that detect objects in the same speed may consume different electronic energies. In this paper, we focus on developing an energy-saving object detection algorithm which can reject a bundle of neighboring sub-images with only one inner-product operation and an acceptable number of addition ones. The total number of multiplications and additions of our algorithm is almost equal to that of the traditional sliding-window method. But in our algorithm the number of multiplication operations is much smaller. Because addition operation consumes less energy than multiplication operation, the proposed method is more energy-saving and efficient. Experimental results on hand detection show that our approach leads to significant improvements in energy and efficiency. © 2012 Elsevier B.V.

Number of references:27

Main heading:Computer vision

Controlled terms:Algorithms - Energy conservation - Energy efficiency - Object recognition - Pattern recognition - Signal detection - Video signal processing

Uncontrolled terms:Computational resources - Detection algorithm - Efficient object detections - Fast algorithms - Multimedia processing - Multiplication operations - Object Detection - Object detection algorithms

Classification code:525.2 Energy Conservation - 716 Telecommunication; Radar, Radio and Television - 723 Computer Software, Data Handling and Applications - 723.5 Computer Applications - 921 Mathematics

DOI:10.1016/j.sigpro.2012.08.019

Database:Compendex

Accession number:20135217144551

Title:Infrared four spectral temperature radiometer electronics design and implemention

Authors:Yi, Bo (1); Zhang, Jian (1); Qu, Enshi (1); Xie, Qingsheng (1); Leng, Hanbing (1); Liu, Wei (1); Wu, Dengshan (1); Lei, Yangjie (1); Wang, Zefeng (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Yi, B.(yibo2068@163.com)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:42

Issue:10

Issue date:2013

Publication year:2013

Pages:2630-2635

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:A four-spectral infrared radiometer, which can automatically measure the temperature of sea surface, was designed to calibration and test the satellite on ground. The electronics system of the infrared radiometer was designed in detail using the spectral modulation, the wave length of 3.5-4 μm, 8-13 μm, 10.3-11.3 μm, 11.5-12.3 μm infrared band was used to acquire and process the data. The temperature of the sea surface was computed by double blackbody standard source real-time automatic correction system parameters and corresponding algorithm. The designed infrared system could also display the temperature and save the data synchronously on PC. In addition, the requirement of sampling precision of 0.1 K was guaranteed by the design of A/D sampling. Finally, by analying the data acquired in south China sea, the measure precision of the system was verified in ±0.5 K, which can satisfy the technical requirement.

Number of references:11

Main heading:Radiometers

Controlled terms:Light - Optical systems

Uncontrolled terms:Automatic corrections - Electronics design - Electronics system - Infra-red radiometers - Multi-spectral - Sea surface temperature (SST) - Spectral modulation - Technical requirement

Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems - 944.7 Radiation Measuring Instruments

Database:Compendex

Accession number:20132616448350

Title:Design and characteristics of cycloolefin copolymer porous terahertz fiber

Authors:Ma, Tian (1); Kong, Depeng (1); Ji, Jiangjun (1); Wang, Guangzhen (1); Wang, Lili (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Ma, T.(matian@opt.cn)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:42

Issue:3

Issue date:March 2013

Publication year:2013

Pages:631-636

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:Terahertz fiber is one of the essential components in the terahertz system. In order to realize minimum low loss and dispersion of terahertz transmittion, a novel hollow terahertz fiber was designed and optimizated, which was based on Topas COC. Using the commercial software COMSOL based on the full-vector finite element method, the transmitting characters of this hollow terahertz fiber were calculated and the effects of the structural parameters on transmitting THz wave in the porous fiber core were analyzed. The research shows that adopting designed porous structure can confine the mode energy in porous core, and obtain small mode area, low propagation loss and nearly zero ultra-flattened dispersion. Increasing rate of the hole diameter to the hole spacing, the more mode energy can be confined in the porous fiber core, and the effective mode area and effective mode loss were reduced, but the confine loss and dispersion would be enlarged simultaneously.

Number of references:17

Main heading:Terahertz waves

Controlled terms:Copolymers - Dispersion (waves) - Fibers - Finite element method

Uncontrolled terms:Commercial software - Cycloolefin copolymers - Effective mode areas - Full vectors - Low propagation loss - Porous structures - Structural parameter - Tera Hertz

Classification code:711 Electromagnetic Waves - 711.1 Electromagnetic Waves in Different Media - 812 Ceramics, Refractories and Glass - 815.1 Polymeric Materials - 817 Plastics and Other Polymers: Products and Applications - 921.6 Numerical Methods

Database:Compendex

Accession number:20131916321612

Title:All-optical format conversion from non-return-to-zero to return-to-zero based on dual-pump four-wave mixing in photonic crystal fiber

Authors:Hui, Zhan-Qiang (1); Zhang, Jian-Guo (2)

Corresponding author:Zhang, J.-G.(zhanqianghui@xupt.edu.cn)

Source title:Wuli Xuebao/Acta Physica Sinica

Abbreviated source title:Wuli Xuebao

Volume:62

Issue:8

Issue date:April 20, 2013

Publication year:2013

Article number:084209

Language:Chinese

ISSN:10003290

CODEN:WLHPAR

Document type:Journal article (JA)

Publisher:Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing, 100190, China

Abstract:A novel all-optical format conversion scheme based on dual-pump four-wave-mixing (DP-FWM) in dispersion-flattened highly nonlinear photonic crystal fiber (DF-HNL-PCF) is proposed and experimentally demonstrated. The original non-return-to-zero (NRZ) format is converted into double return-to-zero (RZ) format by injecting NRZ signal and double synchronized clock signals into the DF-HNL-PCF. The DP-FWM effect generates two sideband components, which carry the same data information as the original NRZ signal with RZ format. The wavelength tunability and dynamic range of format converter are investigated. The optimum extinct ratio and Q factor of converted signals are 15 dB and 5.4, respectively. The advantages of this scheme are that the each wavelength of double channel multicasting signals is dependent and flexible. Moreover, the system is transparent to bit rate as well as modulation format, and achieves all-optical wavelength conversion and wavelength multicasting. © 2013 Chinese Physical Society.

Number of references:34

Main heading:Optical frequency conversion

Controlled terms:Electric clocks - Four wave mixing - Multicasting - Optical communication - Photonic crystal fibers - Photonic crystals - Pumps

Uncontrolled terms:All-optical format conversion - All-optical wavelength conversion - Dual-pump - Format conversion - Highly nonlinear photonic crystal fiber - Non-return-to-zero formats - Return-to-zero formats - Wavelength multicasting

Classification code:741 Light, Optics and Optical Devices - 718 Telephone Systems and Related Technologies; Line Communications - 717.1 Optical Communication Systems - 951 Materials Science - 717 Optical Communication - 704.2 Electric Equipment - 618.2 Pumps - 716 Telecommunication; Radar, Radio and Television

DOI:10.7498/aps.62.084209

Database:Compendex

Accession number:20133016530677

Title:A new super-resolution reconstruction algorithm based on block sparse representation

Authors:Zhao, Xiao Dong (1); Cao, Jian Zhong (1); Zhang, Hui (1); Liu, Guang Sen (1); Wang, Hua (1); Liu, Qing (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100049, China

Source title:Advanced Materials Research

Abbreviated source title:Adv. Mater. Res.

Volume:710

Monograph title:Advanced Technologies and Solutions in Industry

Issue date:2013

Publication year:2013

Pages:603-607

Language:English

ISSN:10226680

ISBN-13:9783037857205

Document type:Journal article (JA)

Conference name:2013 International Conference on Advanced Technologies and Solutions in Industry, ICATSI 2013

Conference date:March 22, 2013 - March 23, 2013

Conference location:Taiyuan, Shanxi, China

Conference code:97849

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:In this paper, we propose a new single super-resolution (SR) reconstruction algorithm via block sparse representation and regularization constraint. Firstly, discrete K-L transform is used to learn compression sub-dictionary according to the specific image block. Combined with threshold choice of training data, the transform bases are generated adaptively corresponding to the sparse domain. Secondly, Non-local Self-similarity (NLSS) regularization term is introduced into sparse reconstruction objective function as a prior knowledge to optimize reconstruction result. Simulation results validate that the proposed algorithm achieves much better results in PSNR and SSIM. It can both enhance edge and suppress noise effectively, which proves better robustness. © (2013) Trans Tech Publications, Switzerland.

Number of references:7

Main heading:Optical resolving power

Controlled terms:Algorithms

Uncontrolled terms:Block sparse - K L transform - Reconstruction algorithms - Regularization terms - Self-similarities - Sparse reconstruction - Super resolution - Super-resolution reconstruction

Classification code:723 Computer Software, Data Handling and Applications - 741.1 Light/Optics - 921 Mathematics

DOI:10.4028/www.scientific.net/AMR.710.603

Database:Compendex

Accession number:20123915470247

Title:Image hiding scheme by use of rotating squared sub-image in the gyrator transform domains

Authors:Liu, Zhengjun (1); Li, She (3); Liu, Wei (4); Liu, Wanyu (1); Liu, Shutian (4)

Author affiliation:(1) HIT-INSA Sino French Research Center for Biomedical Imaging, Department of Automatic Measurement and Control, Harbin Institute of Technology, Harbin 150001, China; (2) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an 710119, China; (3) School of Science, Heilongjiang Institute of Science and Technology, Harbin 150027, China; (4) Department of Physics, Harbin Institute of Technology, Harbin 150001, China

Corresponding author:Liu, Z.(zjliu@hit.edu.cn)

Source title:Optics and Laser Technology

Abbreviated source title:Opt Laser Technol

Volume:45

Issue:1

Issue date:February 2013

Publication year:2013

Pages:198-203

Language:English

ISSN:00303992

CODEN:OLTCAS

Document type:Journal article (JA)

Publisher:Elsevier Ltd, Langford Lane, Kidlington, Oxford, OX5 1GB, United Kingdom

Abstract:An image hiding scheme is proposed based on the scrambling process composed of the rotation of the squared sub-image in the gyrator transform domains. A squared sub-image is first selected from a secret image and is rotated along an axis, which is the center line or diagonal line of the sub-image. The rotation operation will be performed iteratively for utilizing more parameters being regarded as key. Subsequently, the rotated image is converted by gyrator transform into a complex function. The amplitude distribution and phase distribution are scrambled by the rotation process with different parameters. Finally, the encrypted image is obtained by gyrator transform from the rotated complex function. Numerical simulation is given to test the validity of the image encryption algorithm. © 2012 Elsevier Ltd.

Number of references:33

Main heading:Gyrators

Controlled terms:Image processing - Rotation - Security of data

Uncontrolled terms:Amplitude distributions - Complex functions - Gyrator transform - Image encryption algorithm - Image hiding schemes - Phase distribution - Rotated images - Rotation operations - Scrambling operation - Secret images

Classification code:601.1 Mechanical Devices - 708.4 Magnetic Materials - 723.2 Data Processing and Image Processing

DOI:10.1016/j.optlastec.2012.07.004

Database:Compendex

Accession number:20131416157620

Title:High conversion efficiency femtosecond optical parametric amplifier based on silicon waveguide in mid-infrared

Authors:Wen, Jin (1); Liu, Hongjun (1); Huang, Nan (1); Sun, Qibing (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science (CAS), Xi'an 710119, China

Corresponding author:Liu, H.(liuhongjun@opt.ac.cn)

Source title:Optics and Laser Technology

Abbreviated source title:Opt Laser Technol

Volume:50

Issue date:2013

Publication year:2013

Pages:87-92

Language:English

ISSN:00303992

CODEN:OLTCAS

Document type:Journal article (JA)

Publisher:Elsevier Ltd, Langford Lane, Kidlington, Oxford, OX5 1GB, United Kingdom

Abstract:The mid-infrared femtosecond optical parametric amplifier (OPA) in silicon waveguide is proposed and investigated numerically. Through appropriately engineering the waveguide dimensions, the zero-dispersion wavelength of the silicon waveguide can be tailored to 2.1 μm and the broadband phase-matching can be realized. We achieve a conversion efficiency of -40 dB and a conversion bandwidth of over 300 nm for a low pump peak power in 8-mm-long silicon waveguide. We also analyze the evolution of the pump, signal and idler pulses in the process of optical parametric amplification. The proposed OPA exhibits compact configuration and can find important applications in integrated broadband optical source and ultrafast all-optical signal processing in mid-infrared. © 2013 Elsevier Ltd. All rights reserved.

Number of references:26

Main heading:Optical parametric amplifiers

Controlled terms:Infrared devices - Light amplifiers - Nonlinear optics - Optical frequency conversion - Optical parametric oscillators - Optical pumping - Signal processing - Silicon - Waveguides

Uncontrolled terms:All-optical signal processing - Broad-band optical sources - Broadband phase-matching - High conversion efficiency - Optical parametric amplification - Optical parametric amplifiers (OPA) - Silicon waveguide - Zero-dispersion wavelength

Classification code:712.1.1 Single Element Semiconducting Materials - 714 Electronic Components and Tubes - 714.3 Waveguides - 716.1 Information Theory and Signal Processing - 741 Light, Optics and Optical Devices

DOI:10.1016/j.optlastec.2013.02.017

Database:Compendex

Accession number:20135117116184

Title:Rank preserving sparse learning for kinect based scene classification

Authors:Tao, Dapeng (1); Jin, Lianwen (1); Yang, Zhao (1); Li, Xuelong (2)

Author affiliation:(1) School of Electronic and Information Engineering, South China University of Technology, GuangZhou 510640, China; (2) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Xi'an 710119, China

Source title:IEEE Transactions on Cybernetics

Abbreviated source title:IEEE Trans. Cybern.

Volume:43

Issue:5

Issue date:October 2013

Publication year:2013

Pages:1406-1417

Language:English

ISSN:21682267

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., 445 Hoes Lane / P.O. Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:With the rapid development of the RGB-D sensors and the promptly growing population of the low-cost Microsoft Kinect sensor, scene classification, which is a hard, yet important, problem in computer vision, has gained a resurgence of interest recently. That is because the depth of information provided by the Kinect sensor opens an effective and innovative way for scene classification. In this paper, we propose a new scheme for scene classification, which applies locality-constrained linear coding (LLC) to local SIFT features for representing the RGB-D samples and classifies scenes through the cooperation between a new rank preserving sparse learning (RPSL) based dimension reduction and a simple classification method. RPSL considers four aspects: 1) it preserves the rank order information of the within-class samples in a local patch; 2) it maximizes the margin between the between-class samples on the local patch; 3) the L1- norm penalty is introduced to obtain the parsimony property; and 4) it models the classification error minimization by utilizing the least-squares error minimization. Experiments are conducted on the NYU Depth V1 dataset and demonstrate the robustness and effectiveness of RPSL for scene classification. © 2013 IEEE.

Number of references:67

Main heading:Classification (of information)

Controlled terms:Sensors

Uncontrolled terms:Dimension reduction - Kinect sensors - Rank preserving and sparse learning - Rgb-d sensors - Scene classification

Classification code:716.1 Information Theory and Signal Processing - 801 Chemistry

DOI:10.1109/TCYB.2013.2264285

Database:Compendex

Accession number:20132416413133

Title:Large mode area waveguides with polarization functions by volume ultrafast laser photoinscription of fused silica

Authors:Cheng, G. (1); D'Amico, C. (1); Liu, X. (2); Stoian, R. (1)

Author affiliation:(1) Laboratoire Hubert Curien, UMR 5516 CNRS, Université de Lyon, 42000 Saint Etienne, France; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, CAS, Shaanxi, Xi'an 710119, China

Corresponding author:Stoian, R.(razvan.stoian@univ-st-etienne.fr)

Source title:Optics Letters

Abbreviated source title:Opt. Lett.

Volume:38

Issue:11

Issue date:June 1, 2013

Publication year:2013

Pages:1924-1926

Language:English

ISSN:01469592

E-ISSN:15394794

CODEN:OPLEDP

Document type:Journal article (JA)

Publisher:Optical Society of America, 2010 Massachusetts Ave, NW, Washington, DC, DC 20036-1023, United States

Abstract:We present optical designs allowing large mode area light guiding by ultrafast laser photoinscription of bulk fused silica. If usual concepts are based on large core and depressed cladding, evanescently coupled multicore waveguides with coherent mode superposition can be effective solutions, where the introduction of nanostructured defects determines additional polarization functions. © 2013 Optical Society of America.

Number of references:15

Main heading:Waveguides

Controlled terms:Polarization - Ultrafast lasers

Uncontrolled terms:Coherent modes - Depressed cladding - Effective solution - Large mode area - Light guiding - Nano-structured - Photoinscription - Polarization functions

Classification code:711.1 Electromagnetic Waves in Different Media - 714.3 Waveguides - 744.1 Lasers, General

DOI:10.1364/OL.38.001924

Database:Compendex

Accession number:20133016543309

Title:Design of a refractive/diffractive hybrid middle infrared continuous zoom optical system

Authors:Hu, Dandan (1); Zhao, Jianke (1); Xue, Xun (1); Liu, Feng (1); Zhang, Jie (1); Xu, Liang (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an 710119, China

Source title:Key Engineering Materials

Abbreviated source title:Key Eng Mat

Volume:552

Monograph title:Advances in Optics Manufacture

Issue date:2013

Publication year:2013

Pages:33-37

Language:English

ISSN:10139826

CODEN:KEMAEY

ISBN-13:9783037856918

Document type:Conference article (CA)

Conference name:Asia Pacific Conference on Optics Manufacture 2012, APCOM 2012

Conference date:August 26, 2012 - August 28, 2012

Conference location:Changchun, China

Conference code:97919

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:The application of diffractive surface in the continuous zoom system is investigated by taking advantage of the negative dispersion characteristics of binary elements. A sample design is presented in this paper using cool 320×240 detector with staring focal plane array and secondary imaging, and a mid-wave optical system using mechanical-compensated with refractive/diffractive hybrid technique is designed. The Pixel Dimensions of the detector is 30μm, and the wavelength between 3.7μm &sim;4.8μm.The system adopts negative group variable times and positive group of compensation which can realize 18mm&sim;180mm continuous zoom and FOV =36.8°&sim;3.8° , F-number is 2, it consists of 7 lenses including 2 aspheric surface and 1 diffractive surface. The length of this system is 230mm with the reflection mirror to shorten optical path. The results show that the modulation transfer function(MTF) is above 0.6 within the whole focal range at spatial frequency of 17 lp/mm, and Root Mean Square (RMS) value of spot diameter were smaller than the Pixel Dimensions. After the image quality being optimized, the monotonic and smooth cam curve is given and 100% cold shield efficiency is obtained. The curve shows that the imaging plane is stable and the cam is easy to process. The system has advantages of simple structure, high image quality and short zoom path etc. © (2013) Trans Tech Publications, Switzerland.

Number of references:8

Main heading:Optical systems

Controlled terms:Curve fitting - Image quality - Manufacture - Pixels

Uncontrolled terms:Cam curve - Continuous zooms - Diffractive - Diffractive surfaces - Dispersion characteristics - High image quality - Reflection mirrors - Root mean square values

Classification code:537.1 Heat Treatment Processes - 723.5 Computer Applications - 741 Light, Optics and Optical Devices - 741.3 Optical Devices and Systems - 921.6 Numerical Methods

DOI:10.4028/www.scientific.net/KEM.552.33

Database:Compendex

Accession number:20133616704274

Title:Numerical analysis of Ytterbium-doped double-clad fiber lasers based on the temperature-dependent rate equation

Authors:Shao, Hongmin (1); Duan, Kailiang (1); Zhu, Yonggang (1); Yan, Hongwei (1); Yang, Hening (1); Zhao, Wei (1)

Corresponding author:Duan, K.(kl.duan@163.com)

Source title:Optik

Abbreviated source title:Optik

Volume:124

Issue:20

Issue date:October 2013

Publication year:2013

Pages:4336-4340

Language:English

ISSN:00304026

Document type:Journal article (JA)

Publisher:Urban und Fischer Verlag Jena, P.O. Box 100537, Jena, 07705, Germany

Abstract:The effects of temperature on the output power and optimal conditions of Ytterbium-doped double-cladding fiber lasers (YDDFLs) are discussed. Temperature-dependent rate equations for YDDFLs based on Boltzmann distribution are built in two-end pump model. The results show that the output power and the slope efficiency decrease with the increase of temperature. The increase of pump power results in that the effect of the temperature on the output performance increases, and the fiber length is a factor that the effect of the temperature depends on really. Moreover we combine the heat distribution formula with the rate equations and compare the numerical results considering with that not considering the temperature-dependence inside laser cavity, the effect of temperature can be ignored only when the pump power is lower, and the optimal fiber length becomes longer when considering the temperature-dependence. © 2013 Elsevier GmbH.

Number of references:22

Main heading:Ytterbium

Controlled terms:Boltzmann equation - Cladding (coating) - Fiber lasers - Optimization - Temperature distribution

Uncontrolled terms:Boltzmann distribution - Double clad fiber laser - Effect of temperature - Effects of temperature - Rate equations - Temperature dependence - Temperature dependent - Ytterbium-doped fiber lasers

Classification code:922 Statistical Methods - 921.5 Optimization Techniques - 741.1.2 Fiber Optics - 641.1 Thermodynamics - 631 Fluid Flow - 547.2 Rare Earth Metals - 535.1 Metal Rolling

DOI:10.1016/j.ijleo.2013.02.017

Database:Compendex

Accession number:20141317516389

Title:Calibration and correction of the CCD spectral response nonuniformity for Fourier transform imaging spectrometer

Authors:Dalian, Shi (1); Xuebin, Liu (1); Shuang, Wang (1); Juanjuan, Jing (3); Desheng, Wen (1); Qinglan, Bai (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an 710119, China; (2) Graduate University of Chinese Academy of Science, Beijing 1000049, China; (3) Academy of Opto-Electronics, Chinese Academy of Sciences, Beijing 100093, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8910

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Spectrometer Technologies and Applications

Issue date:2013

Publication year:2013

Article number:89101C

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497796

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:Due to the manufacturing technique, some kinds of CCD, such as the back illuminated CCD, have the problem of spectral response nonuniformity. The near infrared light passing through the substrate and gates and is reflected back into the substrate for a second pass resulting in increased response. For the Fourier transform imaging spectrometer, it adds stripe pattern error to the interferogram and distorts the reconstructed spectrum. The nonuniform response is wavelength dependent due to changes in reflectivity of metal and the cavity formed by silicon and metal with transparent dielectric, so it adds difficulty to the correction of the error of the reconstructed spectrum. In order to reduce the error of the reconstructed spectrum, in this paper, a calibration method and a correction method to correct the error caused by the CCD spectral response nonuniformity was developed, basing on analysis of the property of the CCD spectral response nonuniformity. Firstly, a calibrated monochromater was used to measure the CCD spectral response nonuniformity and the property and affect of the CCD spectral response nonuniformity were analyzed. Method to correct the error of the reconstructed spectrum caused by the stripe pattern error was developed. Secondly, to calibrate the CCD spectral response nonuniformity, the spectral response coefficient and the spatial response nonuniformity coefficient was measured and computed. Finally, we took data with a Fourier transform imaging spectrometer, and got the correction results of the reconstructed spectrums. The results showed that the distortion of recovered spectrum was evidently reduced and the effect of the calibration and correction method was proved. © 2013 SPIE.

Number of references:11

Main heading:Image reconstruction

Controlled terms:Calibration - Electromagnetic wave attenuation - Spectrometers

Uncontrolled terms:Back-illuminated CCD - Calibration method - Fourier transform imaging spectrometers - Manufacturing techniques - Near infrared light - Nonuniformity - Spectrum recoveries - Stripe pattern

Classification code:711 Electromagnetic Waves - 741 Light, Optics and Optical Devices - 801 Chemistry - 941 Acoustical and Optical Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments

DOI:10.1117/12.2034271

Database:Compendex

Accession number:20141117451271

Title:Embedding motion and structure features for action recognition

Authors:Zhen, Xiantong (1); Shao, Ling (1); Tao, Dacheng (2); Li, Xuelong (3)

Author affiliation:(1) Department of Electronic and Electrical Engineering, University of Sheffield, S1 3JD, United Kingdom; (2) Centre for Quantum Computation and Intelligent Systems, Faculty of Engineering Information Technology, University of Technology, Sydney, 235 Jones Street, Ultimo, NSW 2007, Australia; (3) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precisio Mechanics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China

Source title:IEEE Transactions on Circuits and Systems for Video Technology

Abbreviated source title:IEEE Trans Circuits Syst Video Technol

Volume:23

Issue:7

Issue date:July 2013

Publication year:2013

Pages:1182-1190

Article number:6413190

Language:English

ISSN:10518215

CODEN:ITCTEM

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:We propose a novel method to model human actions by explicitly coding motion and structure features that are separately extracted from video sequences. Firstly, the motion template (one feature map) is applied to encode the motion information and image planes (five feature maps) are extracted from the volume of differences of frames to capture the structure information. The Gaussian pyramid and center-surround operations are performed on each of the six obtained feature maps, decomposing each feature map into a set of subband maps. Biologically inspired features are then extracted by successively applying Gabor filtering and max pooling on each subband map. To make a compact representation, discriminative locality alignment is employed to embed the high-dimensional features into a low-dimensional manifold space. In contrast to sparse representations based on detected interest points, which suffer from the loss of structure information, the proposed model takes into account the motion and structure information simultaneously and integrates them in a unified framework; it therefore provides an informative and compact representation of human actions. The proposed method is evaluated on the KTH, the multiview IXMAS, and the challenging UCF sports datasets and outperforms stateof-the-art techniques on action recognition.©2013 IEEE.

Number of references:61

Main heading:Motion estimation

Controlled terms:Gesture recognition - Image recognition

Uncontrolled terms:Compact representation - High-dimensional features - Human-action recognition - Low-dimensional manifolds - Sparse representation - State-of-the-art techniques - Structure information - Terms-Biologically inspired features

Classification code:716 Telecommunication; Radar, Radio and Television - 716.1 Information Theory and Signal Processing

DOI:10.1109/TCSVT.2013.2240916

Database:Compendex

Accession number:20141317516359

Title:Optical system design of visible camera for space debris

Authors:Wang, Hu (1); Luo, Jianjun (1)

Author affiliation:(1) School of Astronautics, Northwestern Polytechnical University, Xi'an 710072, China; (2) Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an 710119, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8910

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Spectrometer Technologies and Applications

Issue date:2013

Publication year:2013

Article number:89100G

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497796

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:In order to detect the space debris, a visible camera for space debris was proposed. The visible camera was mainly consisted of primary mirror, secondary mirror. In order to balance aberration, six correcting lens were used in the optical system. To reduce the visible camera system size, two mirrors were joined, which could fold the system and shorten the overall length. The focal length was 12000 mm, field of view was 1. 0 and the f-number was 10.0. The imaging quafity of the optical system in visible camera approached to diffraction limit. © 2013 SPIE.

Number of references:4

Main heading:Cameras

Controlled terms:Diffraction - Manned space flight - Mirrors - Optical systems - Space debris

Uncontrolled terms:Correcting lens - Diffraction limits - Field of views - Focal lengths - Primary mirrors - Rendezvous and docking - Secondary mirror - Visible cameras

Classification code:656.1 Space Flight - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 742.2 Photographic Equipment

DOI:10.1117/12.2032431

Database:Compendex

Accession number:20141517561649

Title:Saliency cut in stereo images

Authors:Peng, Jianteng (1); Shen, Jianbing (1); Jia, Yunde (1); Li, Xuelong (2)

Author affiliation:(1) Beijing Laboratory of Intelligent Information Technology, School of Computer Science, Beijing Institute of Technology, Beijing 100081, China; (2) Center for OPTical IMagery Analysis and Learning (OPTIMAL), Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China

Corresponding author:Shen, J.(shenjianbing@bit.edu.cn)

Source title:Proceedings of the IEEE International Conference on Computer Vision

Abbreviated source title:Proc IEEE Int Conf Comput Vision

Monograph title:Proceedings - 2013 IEEE International Conference on Computer Vision Workshops, ICCVW 2013

Issue date:2013

Publication year:2013

Pages:22-28

Article number:6755875

Language:English

CODEN:PICVES

ISBN-13:9781479930227

Document type:Conference article (CA)

Conference name:2013 14th IEEE International Conference on Computer Vision Workshops, ICCVW 2013

Conference date:December 1, 2013 - December 8, 2013

Conference location:Sydney, NSW, Australia

Conference code:103496

Sponsor:APRS; Australian National University; et al.; IEEE Computer Society; NICTA; The Computer Vision Foundation (CVF)

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:In this paper, we propose a novel saliency-aware stereo images segmentation approach using the high-order energy items, which utilizes the disparity map and statistical information of stereo images to enrich the high-order potentials. To the best of our knowledge, our approach is first one to formulate the automatic stereo cut as the high-order energy optimization problems, which simultaneously segments the foreground objects in left and right images using the proposed high-order energy function. The relationships of stereo correspondence by disparity maps are further employed to enhance the connections between the left and right images. Experimental results demonstrate that the proposed approach can effectively improve the saliency-aware segmentation performance of stereo images. © 2013 IEEE.

Number of references:19

Main heading:Optimization

Controlled terms:Computer science - Computers - Electrical engineering - Image segmentation

Uncontrolled terms:Energy optimization - Foreground objects - High-order potentials - Saliency - Segmentation performance - Statistical information - Stereo correspondences - Stereo-image

Classification code:709 Electrical Engineering, General - 721 Computer Circuits and Logic Elements - 722 Computer Systems and Equipment - 723 Computer Software, Data Handling and Applications - 723.2 Data Processing and Image Processing - 921.5 Optimization Techniques

DOI:10.1109/ICCVW.2013.10

Database:Compendex

Accession number:20141217486679

Title:Pyramid-like spikes in a single crystal superalloy produced by picosecond laser irradiation

Authors:Zhang, Wei (1); Cui, Xiangzhong (1); Feng, Qiang (2); Cheng, Guanghua (4); Ma, Guojia (1); Zhang, Xiaobing (1)

Author affiliation:(1) National Key Laboratory of Science and Technology on Power Beam Processes, Beijing Aeronautical Manufacturing Technology Research Institute, Beijing 100024, China; (2) National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 100083, China; (3) State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China; (4) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an Shaanxi 710119, China

Corresponding author:Zhang, W.(zhangwei0606@gmail.com)

Source title:Applied Physics A: Materials Science and Processing

Abbreviated source title:Appl Phys A

Volume:113

Issue:2

Issue date:November 2013

Publication year:2013

Pages:373-377

Language:English

ISSN:09478396

E-ISSN:14320630

CODEN:APAMFC

Document type:Journal article (JA)

Publisher:Springer Heidelberg

Abstract:Pyramid-like spikes in a single crystal superalloy were investigated upon irradiation with picosecond (ps) laser pulses (200 ps, 800 nm, 1 kHz) under different laser fluences and pulse numbers. Both sides and grooves of pyramid-like spikes were covered with ripples, which had a period of &sim;760 nm. The pyramid-like spike separation increased obviously with increasing laser fluence. Microstructural investigations indicate that the pyramid-like spikeswere initiated with subsequent pulses from a smooth surface with corrugations and ripples. The coexistence of capillary waves for spikes and capillary waves for ripples in the melted material can be used to explain the formation of the pyramid-like spikes. © 2013 Springer-Verlag Berlin Heidelberg.

Number of references:23

Main heading:Single crystals

Controlled terms:Superalloys

Uncontrolled terms:Capillary wave - Laser fluences - Microstructural investigation - Picosecond laser irradiation - Picoseconds - Pulse number - Single crystal superalloys - Smooth surface

Classification code:531 Metallurgy and Metallography - 933.1 Crystalline Solids

DOI:10.1007/s00339-013-7968-9

Database:Compendex

Accession number:20141317510224

Title:Development of the control circuits for the TID-CCD stereo camera of the Chang'E-2 satellite based on FPGAs

Authors:Duan, Yong-Qiang (1); Gao, Wei (1); Qiao, Wei-Dong (1); Wen, De-Sheng (1); Zhao, Bao-Chang (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, 710119, China; (2) University of Chinese Academy of Sciences (CAS), Beijing, 100039, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8907

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications

Issue date:2013

Publication year:2013

Article number:89074U

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497765

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:The TDI-CCD Stereo Camera is the optical sensor on the Chang'E-2 (CE-2) satellite created for the Chinese Lunar Exploration Program. The camera was designed to acquire three-dimensional stereoscopic images of the lunar surface based upon three-line array photogrammetric theory. The primary objective of the camera is, (1) to obtain about 1-m pixel spatial resolution images of the preparative landing location from an ellipse orbit at an altitude of &sim;15km, and (2) to obtain about 7-m pixel spatial resolution global images of the Moon from a circular orbit at an altitude of &sim;100km. The focal plane of the camera is comprised of two TDI-CCDs. The control circuits of the camera are designed based on two SRAM-type FPGAs, XQR2V3000-4CG717. In this paper, a variable frequency control and multi-tap data readout technology for the TDI-CCD is presented, which is able to change the data processing capabilities according to the different orbit mode for the TDI-CCD stereo camera. By this way, the data rate of the camera is extremely reduced from 100Mbps to 25Mbps at high orbit mode, which is benefit to raise the reliability of the image transfer. The results of onboard flight validate that the proposed methodology is reasonable and reliable. © 2013 Copyright SPIE.

Number of references:6

Main heading:CCD cameras

Controlled terms:Data processing - Field programmable gate arrays (FPGA) - Image resolution - Lunar missions - Orbits - Pixels - Satellites - Thermography (imaging)

Uncontrolled terms:Exploration program - Landing locations - Processing capability - Spatial resolution - Spatial resolution images - Stereo cameras - Stereoscopic image - Variable frequency control

Classification code:655.1 Spacecraft, General - 655.2 Satellites - 721.3 Computer Circuits - 723.2 Data Processing and Image Processing - 723.5 Computer Applications - 742.1 Photography - 742.2 Photographic Equipment

DOI:10.1117/12.2034877

Database:Compendex

Accession number:20131116115038

Title:Three-dimensional structure trajectory guiding scan and points cloud registration

Authors:Cai, Yong (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an 710119, China

Corresponding author:Cai, Y.(cyzwwxa@gmail.com)

Source title:Applied Mechanics and Materials

Abbreviated source title:Appl. Mech. Mater.

Volume:300-301

Monograph title:Mechatronics and Applied Mechanics II

Issue date:2013

Publication year:2013

Pages:423-426

Language:English

ISSN:16609336

E-ISSN:16627482

ISBN-13:9783037856512

Document type:Conference article (CA)

Conference name:2nd International Conference on Mechatronics and Applied Mechanics, ICMAM 2012

Conference date:December 8, 2012 - December 9, 2012

Conference location:Taiwan

Conference code:95891

Sponsor:Hwa Hsia Institute of Technology; Taiwan Society of Android Robotics; Trans Tech Publications lnc

Publisher:Trans Tech Publications, P.O. Box 1254, Clausthal-Zellerfeld, D-38670, Germany

Abstract:Three-dimensional visual scanning is an advanced non-contact measurement approach that can obtain a complete surface model of object. But, in the method, the local raster point cloud sets calculated must be registered to a whole. To reduce fluctuating errors and increase efficiency, we propose a new method that scanner can be moved around object guided by pre-planning trajectory of the robot. First, considering the structural parameters of the robot, the Inverse Kinematics Problem of each joint rotating function is derived, and the moving trajectory is simulated. Then, the relationship between the distances of controlled motion and data gotten by scanner is analyzed, a transform matrix which registered the local point cloud sets is deduced, the raster data can be normalized to the world coordinate by it. The experimental results show that error of registration is less than 0.09mm. The method is suited to measuring different targets in robot workspace. It can improve the efficiency and flexibility of visual measurement system. © (2013) Trans Tech Publications, Switzerland.

Number of references:6

Main heading:Three dimensional

Controlled terms:Inverse kinematics - Robot programming - Robots - Scanning - Trajectories

Uncontrolled terms:A-transform - Controlled motions - Inverse kinematics problem - Noncontact measurements - Point cloud - Pre-planning - Raster data - Robot workspaces - Structural parameter - Surface models - Three-dimensional point clouds - Three-dimensional structure - Visual measurements - Visual scanning - World coordinates

Classification code:404.1 Military Engineering - 731.5 Robotics - 741.3 Optical Devices and Systems - 902.1 Engineering Graphics - 931.1 Mechanics

DOI:10.4028/www.scientific.net/AMM.300-301.423

Database:Compendex

Accession number:20135017075229

Title:Method for measuring coordinates of simultaneous two-projectile impact on target

Authors:Dong, Tao (1); Hua, Deng-Xin (1); Li, Yan (1); Ni, Jin-Ping (2)

Author affiliation:(1) School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an 710048, Shaanxi, China; (2) School of Opto-Electronic Engineering, Xi'an Technological University, Xi'an 710032, Shaanxi, China

Corresponding author:Dong, T.(dongtao80@126.com)

Source title:Binggong Xuebao/Acta Armamentarii

Abbreviated source title:Binggong Xuebao

Volume:34

Issue:10

Issue date:October 2013

Publication year:2013

Pages:1273-1278

Language:Chinese

ISSN:10001093

CODEN:BIXUD9

Document type:Journal article (JA)

Publisher:China Ordnance Society, P.O. Box 2431, Beijing, 100081, China

Abstract:In consideration of the fact that the current automatic measuring systems for impact coordinates fail to measure the coordinates of simultaneous two-projectile impact on target, a coordinate measuring scheme of simultaneous two-projectile impact on target based on a linear array CCD camera is presented. A high speed linear CCD camera, two different wavelength semiconductor lasers and a projection board are used in the scheme. The detection light screen of CCD camera, the light screen of the two lasers and the projection plane of projection board are placed in a plane. When two projectiles pass through the detection light screen at the same time, they block out partial laser light projected on the projection board and leave their shadows on it, meanwhile the shadows and images of the two projectiles are acquired by the CCD camera. The shadows and images are differentiated to obtain the position coordinates of projected points by using a computer image processing method, and then the coordinates of simultaneous two-projectile impact on target are obtained by a mathematic model based on the principle of straight line intersection. The measuring principle and formulas are provided, and the measuring error is simulated and analyzed. Experimental results show that the error of the actual measurement value and the theoretical analysis are consistent. The measuring principle can be used to successfully measure the coordinate of simultaneous two-projectile impact on target, and the measuring system based on the measuring principle can be applicable to measure the impact coordinates of projectiles of high RF weapons and multibarrel weapons.

Number of references:12

Main heading:Projectiles

Controlled terms:CCD cameras - Image processing - Measurements

Uncontrolled terms:Automatic measuring system - Computer image processing - Linear array CCD - Position coordinates - Science and Technology - Straight-line intersection - Two different wavelengths - Vertical targets

Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 741 Light, Optics and Optical Devices - 714.2 Semiconductor Devices and Integrated Circuits - 654 Rockets and Rocket Propulsion

DOI:10.3969/j.issn.1000-1093.2013.10.012

Database:Compendex

Accession number:20131816287591

Title:Structured illumination for resolution enhancement and autofocusing in digital holographic microscopy

Authors:Gao, Peng (1); Pedrini, Giancarlo (1); Osten, Wolfgang (1)

Author affiliation:(1) Institut für Technische Optik, Universität Stuttgart, Pfaffenwaldring 9, Stuttgart 70569, Germany; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Gao, P.(peng.gao@ito.uni-stuttgart.de)

Source title:Optics Letters

Abbreviated source title:Opt. Lett.

Volume:38

Issue:8

Issue date:April 15, 2013

Publication year:2013

Pages:1328-1330

Language:English

ISSN:01469592

E-ISSN:15394794

CODEN:OPLEDP

Document type:Journal article (JA)

Publisher:Optical Society of America, 2010 Massachusetts Ave, NW, Washington, DC, DC 20036-1023, United States

Abstract:In this Letter we show how resolution enhancement and autofocusing in digital holographic microscopy is obtained by using structured illumination generated by a spatial light modulator, which enables it to project fringes of different orientations and phase shift without mechanical movement. The image plane is numerically determined by searching for the minimal deviation between the reconstructed images carried by different diffraction orders of the structured illuminations. © 2013 Optical Society of America.

Number of references:16

Main heading:Microscopic examination

Controlled terms:Light modulators - Phase measurement

Uncontrolled terms:Auto-focusing - Diffraction orders - Digital holographic microscopy - Mechanical movements - Reconstructed image - Resolution enhancement - Spatial light modulators - Structured illumination

Classification code:741.3 Optical Devices and Systems - 746 Imaging Techniques - 942.2 Electric Variables Measurements

DOI:10.1364/OL.38.001328

Database:Compendex

Accession number:20134416936251

Title:Multi-spectral dataset and its application in saliency detection

Authors:Wang, Qi (1); Zhu, Guokang (1); Yuan, Yuan (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China

Corresponding author:Yuan, Y.(yuany@opt.ac.cn)

Source title:Computer Vision and Image Understanding

Abbreviated source title:Comput Vision Image Understanding

Volume:117

Issue:12

Issue date:2013

Publication year:2013

Pages:1748-1754

Language:English

ISSN:10773142

E-ISSN:1090235X

CODEN:CVIUF4

Document type:Journal article (JA)

Publisher:Academic Press Inc., 1250 Sixth Avenue, San Diego, California, CA 92101, United States

Abstract:Saliency detection has been researched a lot in recent years. Traditional methods are mostly conducted and evaluated on conventional RGB images. Few work has considered the incorporation of multi-spectral clues. Considering the success of including near-infrared spectrum in applications such as face recognition and scene categorization, this paper presents a multi-spectral dataset and applies it in saliency detection. Experiments demonstrate that the incorporation of near-infrared band is effective in the saliency detection procedure. We also test the combinational models for integrating visible and near-infrared bands. Results show that there is no single model to effect on every saliency detection method. Models should be selected according to the specific employed method. © 2013 Elsevier Inc. All rights reserved.

Number of references:37

Main heading:Infrared devices

Controlled terms:Face recognition - Regression analysis

Uncontrolled terms:Multi-spectral - Near Infrared - Near infrared spectra - Near-infrared bands - Regression model - Saliency - Scene categorization - Visible and near infrared

Classification code:716 Telecommunication; Radar, Radio and Television - 741.3 Optical Devices and Systems - 922.2 Mathematical Statistics

DOI:10.1016/j.cviu.2013.07.002

Database:Compendex

Accession number:20135017088718

Title:Spectroscopic and laser-induced damage properties of Fe2+-doped fluorophosphate glass, a new color-separation material

Authors:Fu, Lili (1); Ren, Wenyi (2); Liu, Chunxiao (1); Xu, Shennuo (1); Zheng, Ruilin (3); Wei, Wei (1); Zhang, Chunmin (2); Peng, Bo (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science (CAS), Xi'an 710119, China; (2) School of Science, Xi'An Jiaotong University, Xi'an 710049, China; (3) Key Laboratory for Organic Electronics and Information Displays (KLOEID), Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, Nanjing 210046, China

Corresponding author:Peng, B.(bpeng@opt.ac.cn)

Source title:Applied Physics B: Lasers and Optics

Abbreviated source title:Appl Phys B

Volume:113

Issue:1

Issue date:October 2013

Publication year:2013

Pages:81-86

Language:English

ISSN:09462171

CODEN:APBOEM

Document type:Journal article (JA)

Publisher:Springer Verlag, Tiergartenstrasse 17, Heidelberg, D-69121, Germany

Abstract:Fe2+-doped fluorophosphate glass (FEFG), a new color-separation material, is prepared by a melt-quenching method. The spectroscopic and laser-induced damage (LID) properties of FEFG are investigated by transmittance spectroscopy, LID tests, scanning electron microscopy, and Raman spectroscopy. Results show that the sample has intensive absorption (>85 %) at 1,053 nm and high transmittance (~86.5 %) at 351 nm after introducing 0.3 wt% Fe <inf>2</inf>O<inf>3</inf>. The LID thresholds of 0.3 wt% Fe<inf>2</inf>O <inf>3</inf>-doped FEFG sample irradiated by 351- and 1,053-nm lasers with 8 ns pulse width are 4.5 and 36.0 J/cm2, respectively. Thus, FEFG has laser-separation ability and can resist nanosecond laser irradiation, indicating that FEFG is a potential color-separation material for high-power lasers. © 2013 Springer-Verlag Berlin Heidelberg.

Number of references:28

Main heading:Color

Controlled terms:Glass - Laser damage - Scanning electron microscopy - Separation

Uncontrolled terms:Doped fluorophosphate glass - High transmittance - Laser-induced damage - Melt quenching method - Pulsewidths - Transmittance spectroscopies

Classification code:461.2 Biological Materials and Tissue Engineering - 741.1 Light/Optics - 802.3 Chemical Operations - 812.3 Glass

DOI:10.1007/s00340-013-5652-6

Database:Compendex

Accession number:20140317216003

Title:Design of a large plane CMOS camera system FPGA

Authors:Liu, Meiying (1); Wang, Hu (1); Wen, Desheng (1); Liu, Jie (1); Liu, Yang (1); Xue, Yaoke (1); Yang, Shaodong (1)

Author affiliation:(1) Xi'an Institute of Optics Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Liu, M.(liumeiying@opt.ac.cn)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:42

Issue:SUPPL.2

Issue date:December 2013

Publication year:2013

Pages:337-342

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:For achieving the high resolution real-time processing of the digital image, using high-performance CMOS image sensor LUPA-4000 produced by CYPRESS company as the key component, a kind of large plane CMOS camera system was designed, based on FPGA and serial communication controller. The overall structure and circuit design were described. Combined with the CMOS image sensor's timing sequence and working mode, the sensor driving circuit and image data memory circuit were implemented with FPGA. Experiments demonstrated that the designed camera system was reasonable. The whole system run steadily and reliably. The communication with computer was exact. Image with high quality had been taken after installing optical system, and the resolution of the image could be achieved 2048×2048 pixels.

Number of references:8

Main heading:Timing circuits

Controlled terms:CMOS integrated circuits - Communication - Digital cameras - Field programmable gate arrays (FPGA) - Integrated circuit manufacture - Optical systems - Pixels

Uncontrolled terms:Circuit designs - CMOS image sensor - Driving circuits - High resolution - High-performance CMOS - Realtime processing - Serial communications - Timing simulations

Classification code:713.4 Pulse Circuits - 714.2 Semiconductor Devices and Integrated Circuits - 716 Telecommunication; Radar, Radio and Television - 721.3 Computer Circuits - 741.3 Optical Devices and Systems - 742.2 Photographic Equipment

Database:Compendex

Accession number:20134817030479

Title:Interferogram filtering method based on empirical mode decomposition

Authors:Jing, Juanjuan (1); Xiangli, Bin (2); Li, Ran (1); Shi, Dalian (1)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technique, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi 710119, China; (2) Key Laboratory of Computational Optical Imaging Technology, Academy of Opto-Electronics, Chinese Academy of Sciences, Beijing 100094, China

Corresponding author:Xiangli, B.(xiangli@aoe.ac.cn)

Source title:Guangxue Xuebao/Acta Optica Sinica

Abbreviated source title:Guangxue Xuebao

Volume:33

Issue:10

Issue date:October 2013

Publication year:2013

Article number:1007001

Language:Chinese

ISSN:02532239

CODEN:GUXUDC

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:Interferogram filtering is a key technique in the process of spectral recovery of imaging Fourier transform spectrometer. Differential filtering and polynomial filtering are usually used, but differential filtering cannot filter the noise completely, and polynomial filtering, which needs the noise type when filtering, produces big bias at both ends of the interferograms. Empirical mode decomposition (EMD), a new signal processing method in linearity and stationary spectral analysis, is now widely used in many aspects. EMD technique is applied to interferogram filtering. It can avoid the disadvantages of differential filtering and polynomial filtering, and it is more reasonable to extract the background noise. The data acquired in the laboratory are used to analyze the precision of different filtering methods. The result indicates that the precisions of differential filtering, polynomial filtering and EMD are 0.0079, 0.0073, 0.0068, respectively. EMD is the optimum filtering method, followed by the polynomial filtering and differential filtering.

Number of references:21

Main heading:Signal processing

Controlled terms:Filtration - Interferometry - Polynomials - Spectroscopy - Spectrum analysis

Uncontrolled terms:Background noise - Empirical Mode Decomposition - Imaging Fourier transform spectrometer - Imaging spectroscopy - Interferogram filtering - Interferograms - Polynomial filtering - Spectral recoveries

Classification code:943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941.4 Optical Variables Measurements - 941 Acoustical and Optical Measuring Instruments - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 921.1 Algebra - 802.3 Chemical Operations - 801 Chemistry - 716.1 Information Theory and Signal Processing - 921 Mathematics

DOI:10.3788/AOS201333.1007001

Database:Compendex

Accession number:20133416650702

Title:The orthogonal verification model based on the on-chip coordinate rotation digital computer

Authors:Li, Tie-Feng (1); Ma, Cai-Wen (1); Li, Wen-Hua (1)

Corresponding author:Li, T.-F.(litiefeng@opt.cn)

Source title:Beijing Youdian Daxue Xuebao/Journal of Beijing University of Posts and Telecommunications

Abbreviated source title:Beijing Youdian Daxue Xuebao

Volume:36

Issue:3

Issue date:June 2013

Publication year:2013

Pages:35-38+43

Language:Chinese

ISSN:10075321

CODEN:BYXBEV

Document type:Journal article (JA)

Publisher:Beijing University of Posts an Telecommunications, 10 Xitucheng Road Haidian District, Beijing, 100088, China

Abstract:In order to improve the verification efficiency of coordinate rotation digital computer (CORDIC), a new verification model that derives from orthogonal statics theory is proposed. Using this model, we set up orthogonal tables with the test factors, and choose the best optimized test method to verify according to orthogonal tables results. Moreover, the proposed model can randomly generate test vectors and automatically check the precision errors of CORDIC calculation results. Simulation results show that the orthogonal model can greatly cut down verification period and improve working efficiency.

Number of references:10

Main heading:Orthogonal functions

Controlled terms:Testing

Uncontrolled terms:Calculation precision - Function verifications - Orthogonal statics - Random - Reference models

Classification code:423.2 Non Mechanical Properties of Building Materials: Test Methods - 921 Mathematics

DOI:10.13190/jbupt.201303.36.litf

Database:Compendex

Accession number:20140417231281

Title:Shock response of a rubber double-deck vibration isolation system

Authors:Zhang, Zhi (1); Zhang, Zhao-Hui (1); Dong, Sen (1); Wang, Ze-Feng (1); Wu, Li (1); Zhang, Kai-Sheng (1); Cao, Jian-Zhong (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an 710119, China

Corresponding author:Zhang, Z.

Source title:Zhendong yu Chongji/Journal of Vibration and Shock

Abbreviated source title:J Vib Shock

Volume:32

Issue:23

Issue date:2013

Publication year:2013

Pages:126-129

Language:Chinese

ISSN:10003835

Document type:Journal article (JA)

Publisher:Chinese Vibration Engineering Society, 121 Nanjiang Lu, Shanghai, 200011, China

Abstract:In aerospace, mechanical environment is abominable. Aiming at this extreme environment, shock response of a double-deck isolation system was studied, and its shock response spectrum under 8000g acceleration shock was analyzed. A rubber damper was used to improve the shock resistance ability of the system, and several factors affecting the shock resistance ability of the rubber damper were analyzed. The test results showed that under 8000g acceleration shock, the shock resistance ability of the double-deck isolation system is better than that of a single-deck isolation system; meanwhile, the span of the rubber damper can greatly affect the shock resistance ability of the system. The study results were very important for shock resistance analysis and structural design of aerospace products.

Number of references:11

Main heading:Structural design

Controlled terms:Mechanical engineering - Mechanical properties

Uncontrolled terms:Aerospace products - Extreme environment - Isolation systems - Mechanical environment - Rubber dampers - Shock response - Shock response spectra - Vibration isolation systems

Classification code:408.1 Structural Design, General - 608 Mechanical Engineering, General - 951 Materials Science

Database:Compendex

Accession number:20140117158170

Title:Design of airborne dual channel ultraviolet-visible imaging spectrometer with large field of view, wide spectrum, and high resolution

Authors:Hao, Ai-Hua (1); Hu, Bing-Liang (1); Bai, Jia-Guang (1); Li, Li-Bo (1); Yu, Tao (1); Li, Si-Yuan (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) School of Electronic Engineering, Xi'an University of Post and Telecommunications, Xi'an 710121, China; (3) University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Hao, A.-H.(haoaihua200177@163.com)

Source title:Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis

Abbreviated source title:Guang Pu Xue Yu Guang Pu Fen Xi

Volume:33

Issue:12

Issue date:December 2013

Publication year:2013

Pages:3432-3436

Language:Chinese

ISSN:10000593

CODEN:GYGFED

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:The ultraviolet-visible (UV-Vis 200~500 nm) imaging spectrometer is an important part of space remote sensing. Based on special requirements and practical application of the airborne UV-VIS spectrometer, a kind of scanning imaging spectrometer using area array CCD is proposed, which can meet the application requirements of large field of view, wide spectrum and high resolution. It overcomes low spatial resolution of traditional line array CCD scanning imaging spectrometer, and limited field of view of the pushbroom imaging spectrometer. In addition, dual channel was designed to reduce stray light. 400~500 nm band includes two order spectrum for 200~250 nm band, and variation of radiance from earth between the shorter wavelength (<290 nm) and the longer wavelength (>310 nm) is above three orders of magnitude. In the structure design of the system, the imaging spectrometer is composed of a two-mirror concentric telescope and two Czerny-Turner plane grating imaging spectrometers. The whole system doesn't use any additional optical elements in addition to spherical mirrors. The whole system has the advantage of simple structure, excellent performance, and very good feasibility. The modulation transfer function value of full spectrum and full field of view is above 0.6.

Number of references:11

Main heading:Spectrometers

Controlled terms:Mirrors - Optics

Uncontrolled terms:High resolution - Imaging spectrometers - Large field of views - Ultraviolet - Wide spectrum

Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems

DOI:10.3964/j.issn.1000-0593(2013)12-3432-05

Database:Compendex

Accession number:20132316393157

Title:Investigation of mid-IR luminescence properties and energy transfer in Dy3+-doped and Dy3+, Tm3+-codoped chalcohalide glasses

Authors:Meng, Wei (1); Xu, Yantao (1); Guo, Haitao (1); Lu, Chunfeng (1); Hou, Chaoqi (1); Lu, Min (1); Wang, Pengfei (1); Li, Weinan (1); Peng, Bo (1); Lu, Yunqing (2); Wei, Wei (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science (CAS), Xi'an, Shaanxi 710119, China; (2) College of Optoelectronics Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210046, China

Corresponding author:Guo, H.(guoht_001@opt.ac.cn)

Source title:Optical Materials

Abbreviated source title:Opt Mater

Volume:35

Issue:8

Issue date:June 2013

Publication year:2013

Pages:1499-1503

Language:English

ISSN:09253467

CODEN:OMATET

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:A series of Dy3+-doped and Dy3+/Tm 3+-codoped chalcohalide glasses (72GeS<inf>2</inf>·18Ga <inf>2</inf>S<inf>3</inf>·10AgI) were prepared. The optical properties of the glasses, including Judd-Ofelt strength parameters, transition probabilities, excited state lifetimes, fluorescence branching ratios and emission cross-sections were calculated based on the absorption and emission spectra. For the Dy3+-doped glasses, the emission intensity at 1330 nm increases obviously with increasing of Dy3+ doping content from 0.2 to 0.5 wt.%, and the fluorescence lifetimes keep at 40 μs. The emission cross-section of the Dy3+-doped glass (0.5 wt.%) was calculated to be 4.16 × 10-20 cm2. For the Dy3+/Tm 3+-codoped glasses, Tm3+ ions can absorb excitation energy and effectively transfer energy to Dy3+ ions. The intensified mid-IR emissions were observed obviously, the emission cross-sections for the codoped glasses (0.8 wt.% Dy3+ and 0.5 wt.% Tm3+) were calculated to be 1.40 × 10-20 cm2 at 2900 nm and 1.52 × 10-20 cm2 at 4300 nm, respectively. © 2013 Elsevier B.V. All rights reserved.

Number of references:19

Main heading:Doping (additives)

Controlled terms:Emission spectroscopy - Energy transfer - Fluorescence - Glass - Nuclear physics - Optical properties - Rare earths - Silver halides

Uncontrolled terms:Absorption and emission spectra - Chalcohalide glass - Excited state lifetimes - Fluorescence branching ratio - Fluorescence lifetimes - Luminescence properties - Mid-IR lasers - Transition probabilities

Classification code:932.2 Nuclear Physics - 812.3 Glass - 804.2 Inorganic Compounds - 804 Chemical Products Generally - 801 Chemistry - 741.1 Light/Optics - 641.2 Heat Transfer

DOI:10.1016/j.optmat.2013.03.007

Database:Compendex

Accession number:20134616974398

Title:Super-resolution image reconstruction algorithm via regularized sparse representation

Authors:Zhu, Bo (1); Li, Hua (3); Gao, Wei (1); Song, Zong-Xi (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) The Joint Laboratory for Space Vision of XJTU-XIOPM, Xi'an 710049, China; (3) Shangluo University, Shangluo 726000, China

Corresponding author:Zhu, B.(zhubo@opt.ac.cn)

Source title:Guangdianzi Jiguang/Journal of Optoelectronics Laser

Abbreviated source title:Guangdianzi Jiguang

Volume:24

Issue:10

Issue date:October 2013

Publication year:2013

Pages:2024-2030

Language:Chinese

ISSN:10050086

CODEN:GUJIE9

Document type:Journal article (JA)

Publisher:Board of Optronics Lasers, No. 47 Yang-Liu-Qing Ying-Jian Road, Tian-Jin City, 300380, China

Abstract:In order to produce a higher resolution image from a low-resolution one, a machine learning super-resolution image reconstruction method via regularized sparse representation is presented. A convex variational model is proposed for image super-resolution with sparse representation regularization. We further introduce two adaptive regularization terms into the sparse representation framework to improve the processing effect. Firstly, the Graph Laplacian based image clustering model which takes the local manifold structure into account to a given patch is selected to regularize the image local structures. Secondly, the image nonlocal self-similarity is introduced as another regularization term, which improves the quality of reconstructed images. Therefore, the sparse representation of a low-resolution image patch can be applied with the high-resolution image patch dictionary to generate a high-resolution image patch, and then, the high-resolution image is obtained. Experimental results proved that the proposed algorithm outperforms some state-of-the-art super-resolution methods both in peak signal-to-noise ratio (PSNR) measure and visual quality.

Number of references:24

Main heading:Optical resolving power

Controlled terms:Algorithms - Image reconstruction - Laplace transforms

Uncontrolled terms:Graph Laplacian - Image clustering - Regularization - Sparse representation - Superresolution

Classification code:723 Computer Software, Data Handling and Applications - 741 Light, Optics and Optical Devices - 741.1 Light/Optics - 921 Mathematics - 921.3 Mathematical Transformations

Database:Compendex

Accession number:20130916069927

Title:Ultrafast laser machine based on all-fiber femtosecond laser system

Authors:Li, Dongjuan (1); Cheng, Guanghua (1); Yang, Zhi (1); Wang, Yishan (1)

Corresponding author:Li, D.(lidongjuan@opt.cn)

Source title:Advanced Materials Research

Abbreviated source title:Adv. Mater. Res.

Volume:652-654

Monograph title:Advances in Materials and Materials Processing

Issue date:2013

Publication year:2013

Pages:2374-2377

Language:English

ISSN:10226680

ISBN-13:9783037856208

Document type:Conference article (CA)

Conference name:2012 3rd International Conference on Advances in Materials and Manufacturing Processes, ICAMMP 2012

Conference date:December 22, 2012 - December 23, 2012

Conference location:Beihai, China

Conference code:95667

Sponsor:University of Wollongong, Australia; Northeastern University, China; University of Science and Technology Beijing; Hong Kong Industrial Technology Research Centre

Publisher:Trans Tech Publications, P.O. Box 1254, Clausthal-Zellerfeld, D-38670, Germany

Abstract:A femtosecond laser machine consisting of femtosecond fiber laser, trepanning head, linear motor stages system and Siemens 840D system has been integrated for industry application. The femtosecond laser source is all fiber system which contains a fiber mode-lock laser at 1053 nm with a repetition rate of 3.9 MHz, a double-cladding gain fiber amplifiers and a PCF amplifier. An acoustical modulator has employed to tune repetition rate from 3.9 MHz to 100 KHz. An in-line fiber chirped grating is used to stretch the pulse duration to 700 ps. After the PCF amplifier pulse is compressed to sub-ps with 50% efficiency based two grating compressor. The system outputs an average power of 15 W at 100 KHz and 800 fs. Using four wedges trepanning head, cylinder hole is drilled in 1mm thickness SiC ceramics in 30 s. © (2013) Trans Tech Publications, Switzerland.

Number of references:7

Main heading:Ultrashort pulses

Controlled terms:Fiber amplifiers - Fibers - Industrial applications - Silicon carbide - Ultrafast lasers

Uncontrolled terms:1053 nm - All fiber - All-fiber system - Amplifier pulse - Average power - Chirped gratings - Cylinder hole - Double-cladding - Femtosecond fiber lasers - Femtosecond laser system - Grating compressors - Industry applications - Laser micro-machining - Mode lock - PCF - Pulse durations - Repetition rate - SiC ceramics - Siemens - System output - Trepanning head

Classification code:744.1 Lasers, General - 744.4 Solid State Lasers - 812 Ceramics, Refractories and Glass - 812.2 Refractories - 817 Plastics and Other Polymers: Products and Applications - 913 Production Planning and Control; Manufacturing

DOI:10.4028/www.scientific.net/AMR.652-654.2374

Database:Compendex

Accession number:20132616444984

Title:Spectroscopic properties of ZrF<inf>4</inf>-based fluorophosphate laser glasses with large stimulated emission cross-section and high thermal stability

Authors:Zheng, R.L. (1); Wang, P.F. (2); Xu, S.N. (2); Wei, W. (1); Peng, B. (1)

Author affiliation:(1) Key Laboratory for Organic Electronics and Information Displays, Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, Nanjing 210046, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Source title:Laser Physics

Abbreviated source title:Laser Phys.

Volume:23

Issue:4

Issue date:April 2013

Publication year:2013

Article number:045805

Language:English

ISSN:1054660X

E-ISSN:15556611

Document type:Journal article (JA)

Publisher:Institute of Physics Publishing, Temple Circus, Temple Way, Bristol, BS1 6BE, United Kingdom

Abstract:A new kind of ytterbium-doped ZrF<inf>4</inf>-based fluorophosphate glass (FPZ), with large stimulated emission cross-section and high thermal stability, is prepared by introducing heavy metal oxides (HMO). The effects of HMO on glass structure, spectra and fluorescence are examined by Raman spectra, absorption and emission spectra. The result shows that the peak values of integrated absorption and emission cross-sections of the sample FPZ-6 are 7.15 × 104 pm3 and 1.29 pm2, with a lifetime of 1.51 ms and a ΔT(T<inf>x</inf> - T<inf>g</inf>) of 179.4 °C, implying that the novel FPZ glasses have potential applications as gain media in high-power lasers and fiber lasers. © 2013 Astro Ltd.

Number of references:18

Main heading:Glass

Controlled terms:Emission spectroscopy - Fiber lasers - Heavy metals - Thermodynamic stability

Uncontrolled terms:Absorption and emission cross-sections - Absorption and emission spectra - Fluorophosphate glass - Fluorophosphate laser glass - Heavy metal oxides - High thermal stability - Spectroscopic property - Stimulated emission cross section

Classification code:531 Metallurgy and Metallography - 641.1 Thermodynamics - 741.1.2 Fiber Optics - 801 Chemistry - 812.3 Glass

DOI:10.1088/1054-660X/23/4/045805

Database:Compendex

Accession number:20135117094981

Title:Learning discriminative key poses for action recognition

Authors:Liu, Li (1); Shao, Ling (1); Zhen, Xiantong (1); Li, Xuelong (3)

Author affiliation:(1) Department of Electronic and Electrical Engineering, University of Sheffield, Sheffield S1 3JD, United Kingdom; (2) College of Electronic and Information Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, Jiangsu, China; (3) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Xi'an 710119, China

Corresponding author:Shao, L.(ling.shao@sheffield.ac.uk)

Source title:IEEE Transactions on Cybernetics

Abbreviated source title:IEEE Trans. Cybern.

Volume:43

Issue:6

Issue date:December 2013

Publication year:2013

Pages:1860-1870

Article number:6409441

Language:English

ISSN:21682267

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., 445 Hoes Lane / P.O. Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:In this paper, we present a new approach for human action recognition based on key-pose selection and representation. Poses in video frames are described by the proposed extensive pyramidal features (EPFs), which include the Gabor, Gaussian, and wavelet pyramids. These features are able to encode the orientation, intensity, and contour information and therefore provide an informative representation of human poses. Due to the fact that not all poses in a sequence are discriminative and representative, we further utilize the AdaBoost algorithm to learn a subset of discriminative poses. Given the boosted poses for each video sequence, a new classifier named weighted local naive Bayes nearest neighbor is proposed for the final action classification, which is demonstrated to be more accurate and robust than other classifiers, e.g., support vector machine (SVM) and naive Bayes nearest neighbor. The proposed method is systematically evaluated on the KTH data set, the Weizmann data set, the multiview IXMAS data set, and the challenging HMDB51 data set. Experimental results manifest that our method outperforms the state-of-the-art techniques in terms of recognition rate. © 2013 IEEE.

Number of references:55

Main heading:Adaptive boosting

Controlled terms:Classifiers - Computer vision - Gesture recognition - Motion estimation - Support vector machines

Uncontrolled terms:Action classifications - Contour information - extensive pyramidal features (EPFs) - Human-action recognition - Nearest neighbors - pose selection - State-of-the-art techniques - Weizmann data sets

Classification code:716 Telecommunication; Radar, Radio and Television - 716.1 Information Theory and Signal Processing - 723 Computer Software, Data Handling and Applications - 723.5 Computer Applications - 802.1 Chemical Plants and Equipment

DOI:10.1109/TSMCB.2012.2231959

Database:Compendex

Accession number:20132616444997

Title:A nonuniform-polarization high-energy ultra-broadband laser with a long erbium-doped fiber

Authors:Mao, Dong (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Source title:Laser Physics

Abbreviated source title:Laser Phys.

Volume:23

Issue:3

Issue date:March 2013

Publication year:2013

Article number:035104

Language:English

ISSN:1054660X

E-ISSN:15556611

Document type:Journal article (JA)

Publisher:Institute of Physics Publishing, Temple Circus, Temple Way, Bristol, BS1 6BE, United Kingdom

Abstract:We have experimentally investigated nonuniformly polarized broadband high-energy pulses delivered from a mode-locked laser with an ultra-long erbium-doped fiber (EDF). The pulses exhibit a broadband spectrum of &sim;73 nm and can avoid optical wave breaking at high-pump regimes. The polarization states of the pulses evolve from uniform to nonuniform at each round trip in the oscillator, which is distinct from other pulses. Remarkably, the output pulses broaden in anomalous- or normal-dispersion regimes while they can be shortened with an EDF amplifier external to the cavity. Our results suggest that the long EDF results in a nonuniform-polarization state and plays a decisive role in the formation of high-energy pulses. © 2013 Astro Ltd.

Number of references:41

Main heading:Optical pumping

Controlled terms:Polarization

Uncontrolled terms:Broad-band spectrum - Erbium doped fibers - High energy pulse - Mode-locked laser - Optical wave breaking - Output pulse - Polarization state - Ultra-broadband lasers

Classification code:741.1 Light/Optics

DOI:10.1088/1054-660X/23/3/035104

Database:Compendex

Accession number:20133416636446

Title:A dielectric-barrier discharge enhanced plasma brush array at atmospheric pressure

Authors:Li, Xuemei (1); Tang, Jie (2); Zhan, Xuefang (1); Yuan, Xin (1); Zhao, Zhongjun (1); Yan, Yanyue (1); Duan, Yixiang (1)

Author affiliation:(1) Research Center of Analytical Instrumentation, College of Chemistry, Sichuan University, Chengdu, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, CAS, Xi'an, China

Corresponding author:Duan, Y.(yduan1@yahoo.com)

Source title:Applied Physics Letters

Abbreviated source title:Appl Phys Lett

Volume:103

Issue:3

Issue date:July 15, 2013

Publication year:2013

Article number:033519

Language:English

ISSN:00036951

CODEN:APPLAB

Document type:Journal article (JA)

Publisher:American Institute of Physics, 2 Huntington Quadrangle, Suite N101, Melville, NY 11747-4502, United States

Abstract:This study developed a large volume cold atmospheric plasma brush array, which was enhanced by a dielectric barrier discharge by integrating a pair of DC glow discharge in parallel. A platinum sheet electrode was placed in the middle of the discharge chamber, which effectively reduced the breakdown voltage and working voltage. Emission spectroscopy diagnosis indicated that many excited argon atoms were distributed almost symmetrically in the lateral direction of the plasma. The concentration variations of reactive species relative to the gas flow rate and discharge current were also examined. © 2013 AIP Publishing LLC.

Number of references:35

Main heading:Brushes

Controlled terms:Atmospheric pressure - Emission spectroscopy - Glow discharges

Uncontrolled terms:Cold atmospheric plasmas - Concentration variation - DC glow discharge - Dielectric barrier discharges - Discharge chamber - Discharge currents - Lateral directions - Reactive species

Classification code:443.1 Atmospheric Properties - 605 Small Tools and Hardware - 701.1 Electricity: Basic Concepts and Phenomena - 801 Chemistry

DOI:10.1063/1.4816061

Database:Compendex

Accession number:20134216860485

Title:Energy design of Fourier telescope system in the atmospheric environment

Authors:Luo, Xiujuan (1); Zhang, Yu (1); Sun, Xin (1); Cao, Bei (1); Zeng, Zhihong (1); Xia, Aili (1); Li, Libo (1); Zhu, Shaolan (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi 710119, China

Corresponding author:Luo, X.(xj_luo@opt.ac.cn)

Source title:Guangxue Xuebao/Acta Optica Sinica

Abbreviated source title:Guangxue Xuebao

Volume:33

Issue:8

Issue date:August 2013

Publication year:2013

Pages:0801004

Language:Chinese

ISSN:02532239

CODEN:GUXUDC

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:Energy design technology is one of the key techniques of Fourier telescope. Laser propagation in the atmosphere and its impact on the energy of the laser beams are analyzed. According to the uplink and downlink transmission of energy, a total laser energy calculation method of Fourier telescope system is derived, and the corresponding applicable conditions are given. Meanwhile, based on radiation theory, a fast energy estimation method is proposed by which the required total transmitter energy of a Fourier telescope for 1000 km low-orbit objects is estimated. The effects of transmitter energy imbalance on the image quality are pointed out and simulated. It can be concluded that the intensity differences among laser beams of transmitter array must be less than 5%. From the atmospheric transmittance, laser emitting aperture, beam collimation, transmitting scheme, speckle effect, receiving technologies, image reconstruction techniques and other aspects, the design ideas and measurements to reduce energy loss are put forward.

Number of references:16

Main heading:Fourier transforms

Controlled terms:Atmospheric optics - Design - Earth atmosphere - Energy dissipation - Image reconstruction - Laser beams - Lasers - Telescopes - Transmitters

Uncontrolled terms:Active imaging - Atmospheric environment - Atmospheric transmittance - Downlink transmissions - Energy design - Energy estimation methods - Fourier telescopy - Image reconstruction techniques

Classification code:744.8 Laser Beam Interactions - 744.1 Lasers, General - 741.1 Light/Optics - 741 Light, Optics and Optical Devices - 921.3 Mathematical Transformations - 716 Telecommunication; Radar, Radio and Television - 525.4 Energy Losses (industrial and residential) - 443.1 Atmospheric Properties - 408 Structural Design - 657 Space Physics

DOI:10.3788/AOS201333.0801004

Database:Compendex

Accession number:20132116362355

Title:Design of optical window thickness and influence of its deformation on multi-spectral camera's optical performance

Authors:Fang, Yu (1); Xiangli, Bin (3); Lü, Qunbo (3); Jing, Juanjuan (1)

Corresponding author:Fang, Y.(fangyuopt@126.com)

Source title:Guangxue Xuebao/Acta Optica Sinica

Abbreviated source title:Guangxue Xuebao

Volume:33

Issue:4

Issue date:April 2013

Publication year:2013

Article number:0422007

Language:Chinese

ISSN:02532239

CODEN:GUXUDC

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:Based on the fracture mechanics analysis, the glass thickness of the optical window of an airborne multi-spectral camera is designed in detail. Correlation analyses solve the engineering design problems of the optical window thickness and ensure the design more reasonable and reliable. Considering the complex environment, steady-state temperature field is calculated by means of finite element method. Linking temperature load to generalized force load, the deformation of optical window under the structure-thermal coupling condition is calculated. Optical window surface after deformation are derived by fitting the final deformation value using Zernike polynomial fitting. Fitting coefficients as the input of Zemax, the impact of the deformation of the optical window on the optical performance of multi-spectral camera is analyzed by means of wavefront error and modulaiton transfer function (MTF) as a measurement of imaging quality. The result shows that based on the known operational environment, the impact on imaging quality of optical system is negligible.

Number of references:16

Main heading:Deformation

Controlled terms:Cameras - Finite element method - Fracture mechanics - Glass - Optical design - Optical systems

Uncontrolled terms:Coupled analysis - Engineering design problems - Fracture mechanics analysis - Glass thickness - Optical window - Steady-state temperature fields - Zernike polynomial fitting - Zernike polynomials

Classification code:921.6 Numerical Methods - 812.3 Glass - 742.2 Photographic Equipment - 741.3 Optical Devices and Systems - 741.1 Light/Optics - 422 Strength of Building Materials; Test Equipment and Methods - 421 Strength of Building Materials; Mechanical Properties

DOI:10.3788/AOS201333.0422007

Database:Compendex

Accession number:20131516186404

Title:The generation of dissipative solitons in an all-fiber passively mode-locked laser based on semiconduct type of carbon nanotubes absorber

Authors:Wang, Yishan (1); Liu, Xianglian (1); Wang, Yonggang (1); Li, Xiaohui (1); Zhao, Wei (1); Hu, Xiaohong (1); Zhang, Wei (1); Wang, Hushan (1); Yang, Zhi (1); Shen, Deyuan (1); Li, Cheng (1); Chen, Guangde (1); Tsang, Yuen Hong (3)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) School of Science, Xi'An Jiaotong University, Xi'an 710049, China; (3) Department of Applied Physics, Hong Kong Polytechnic University, Hong Kong, Hong Kong; (4) College of Energy Engineering, Yulin University, Yulin 719000, Shaanxi, China

Corresponding author:Wang, Y.(yshwang@opt.ac.cn)

Source title:Optical Fiber Technology

Abbreviated source title:Opt. Fiber Technol.

Volume:19

Issue:3

Issue date:June 2013

Publication year:2013

Pages:200-205

Language:English

ISSN:10685200

CODEN:OFTEFV

Document type:Journal article (JA)

Publisher:Academic Press Inc., 1250 Sixth Avenue, San Diego, California, CA 92101, United States

Abstract:We report theoretically and experimentally on the formation and compensation of dissipative soliton (DS) in an all-normal dispersion fiber laser mode locked with semiconductor type of carbon nanotubes (CNTs) absorber fabricated by vertical evaporation method. The pulses with bandwidth of 2.2 nm and duration of 11.7 ps are obtained at 1051 nm. The DS is linearly chirped and can be compressed to 1.8 ps by a grating pair. By this method the carbon nanotubes absorbers is can be mass produced cost effectively and easier to control the absorber parameters, e.g. initial transmission of the absorber, therefore this method is more suitable to be industrialized. © 2013 Elsevier Inc. All rights reserved.

Number of references:31

Main heading:Carbon nanotubes

Controlled terms:Fiber lasers - Laser mode locking - Passive mode locking - Semiconductor materials - Solitons

Uncontrolled terms:Absorber - All fiber - All-normal dispersions - Dissipative solitons - Evaporation method - Grating pair - Passively mode-locked lasers - Semiconductor-type

Classification code:712.1 Semiconducting Materials - 744.1 Lasers, General - 744.4 Solid State Lasers - 761 Nanotechnology - 931.3 Atomic and Molecular Physics

DOI:10.1016/j.yofte.2013.01.007

Database:Compendex

Accession number:20131116114705

Title:Design of the airborne prism dispersive imaging spectrometer system based on Offner relay configuration

Authors:Fang, Yu (1); Xiangli, Bin (3); Yuan, Yan (4); Lü, Qun-Bo (3); Zhou, Jin-Song (3)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) Graduate University of Chinese Academy of Sciences, Beijing 100049, China; (3) Academy of Opto-Electronics, Chinese Academy of Sciences, Beijing 100094, China; (4) Beihang University, Beijing 100191, China

Corresponding author:Fang, Y.(fangyuopt@126.com)

Source title:Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis

Abbreviated source title:Guang Pu Xue Yu Guang Pu Fen Xi

Volume:33

Issue:3

Issue date:March 2013

Publication year:2013

Pages:838-843

Language:Chinese

ISSN:10000593

CODEN:GYGFED

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:Considering the development of the need for small volume and light weight of spectral imaging systems on airborne platform, the characters of several main imaging spectrometers was analyzed and the present paper focuses on introducing imaging spectrometers featuring a grating or a prism disperser. A compact hyperspectral imaging system based on Offner relay configuration is reported. Combining the characters of the concentric Offner relay, and knowing the system design parameters, two novel kinds of spherical spectrometer systems using dispersive elements in divergent and convergent beam were designed. Moreover, the system MTF, spot diagram and the curves of smile and keystone were analyzed. The results show that these two kinds of Offner spectrometer achieve the purpose of a compact form of remote sensing system with excellent imaging quality close to diffraction limit. At the same time, decreasing the smile and keystone to a small (0.1) fraction of a pixel assures uniformity of acquiring spectral data.

Number of references:12

Main heading:Spectrometers

Controlled terms:Arches - Diffraction - Imaging systems - Optical design - Prisms - Remote sensing - Spectroscopy

Uncontrolled terms:Curved prisms - Hyperspectral Imaging - Imaging spectrometers - Offner relay configuration - Prism spectrometer

Classification code:408.2 Structural Members and Shapes - 731.1 Control Systems - 741 Light, Optics and Optical Devices - 746 Imaging Techniques - 801 Chemistry

DOI:10.3964/j.issn.1000-0593(2013)03-0838-06

Database:Compendex

Accession number:20124715685968

Title:Yb-doped passively mode-locked fiber laser based on a single wall carbon nanotubes wallpaper absorber

Authors:Li, Xiaohui (1); Wang, Yonggang (3); Wang, Yishan (1); Liu, Xianglian (1); Zhao, Wei (1); Hu, Xiaohong (1); Yang, Zhi (1); Zhang, Wei (1); Gao, Cunxiao (1); Shen, Deyuan (1); Li, Cheng (1); Tsang, Yuen H. (3)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) School of Science, Xi'An Jiaotong University, Xi'an 710049, China; (3) Department of Applied Physics, Hong Kong Polytechnic University, Hong Kong, Hong Kong

Corresponding author:Li, X.(lixiaohui1983@opt.ac.cn)

Source title:Optics and Laser Technology

Abbreviated source title:Opt Laser Technol

Volume:47

Issue date:April 2013

Publication year:2013

Pages:144-147

Language:English

ISSN:00303992

CODEN:OLTCAS

Document type:Journal article (JA)

Publisher:Elsevier Ltd, Langford Lane, Kidlington, Oxford, OX5 1GB, United Kingdom

Abstract:A passively mode-locked Yb-doped fiber laser is demonstrated based on a band-pass filter together with a novel fabricated single-wall carbon nanotubes (SWCNT) wallpaper absorber. Mode-locking can be achieved with a low threshold pump power of 32 mW. The proposed fiber laser operates at 1064 nm with the spectral width of about 0.57 nm and pulse repetition rate of about 19.45 MHz. The pulse duration is about 276 ps, which can be used directly as seed source for chirped pulse amplification (CPA) system.

Number of references:29

Main heading:Carbon nanotubes

Controlled terms:Bandpass filters - Chirp modulation - Fiber lasers - Lasers - Passive mode locking - Pulse amplifiers - Ytterbium

Uncontrolled terms:1064 nm - Band pass - Chirped pulse amplification systems - Lasers fiber - Low thresholds - Mode-locked laser - Modelocking - Passively mode-locked - Pulse durations - Seed source - Spectral widths - Yb-doped fiber lasers

Classification code:761 Nanotechnology - 744.4 Solid State Lasers - 744.1 Lasers, General - 716 Telecommunication; Radar, Radio and Television - 713.1 Amplifiers - 703.2 Electric Filters - 547.2 Rare Earth Metals

DOI:10.1016/j.optlastec.2012.08.010

Database:Compendex

Accession number:20134216857689

Title:Improved design of a pseudo-cassegrain optical system

Authors:Yang, Huanli (1); Chen, Rongli (1); Liu, Kai (1); Lei, Guangzhi (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, 710119, China; (2) University of Chinese Academy of Sciences, Beijing, 100049, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8908

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Sensors and Applications

Issue date:2013

Publication year:2013

Article number:89081R

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497772

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:This paper uses a pseudo-cassegrain system as the initial structure, whose full field of view and F number are 5.6 and 1.63, respectively. Then the authors make further improvements and optimization in large weights and serious central obscuration. The final system is designed with preference of smaller central obscuration, lower manufacturing difficulty, lighter, simpler configuration and lower cost compared with the initial pseudo-cassegrain optical system. In addition, what is different from the previous modified cassegrain system is that secondary mirror of the final system is a plane mirror which is easier to fabricate and install. At the same time, the final system has three significant characteristics of these three systems: cassegrain, maksutov and schmidt. At last, the dissertation certificates the feasibility of the new system in the angle of aberration analysis, spot diagram analysis and energy analysis. It also provides a new design method for the optical system of moderate field, large relative aperture and wide spectral. © 2013 SPIE.

Number of references:7

Main heading:Optical systems

Controlled terms:Aberrations - Energy management - Mirrors

Uncontrolled terms:Cassegrain - Central obscuration - Energy analysis - Plane mirrors - Spot diagram

Classification code:525 Energy Management and Conversion - 741 Light, Optics and Optical Devices - 741.3 Optical Devices and Systems

DOI:10.1117/12.2034464

Database:Compendex

Accession number:20132016329333

Title:Theoretical and experimental study of two-phase-stepping approach for hard X-ray differential phase contrast imaging

Authors:Du, Yang (1); Lei, Yao-Hu (1); Liu, Xin (1); Guo, Jin-Chuan (1); Niu, Han-Ben (1)

Author affiliation:(1) Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China; (2) CAS Key Laboratory of Ultrafast Diagnostics, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an 710119, China

Corresponding author:Niu, H.-B.(hbniu@szu.edu.cn)

Source title:Wuli Xuebao/Acta Physica Sinica

Abbreviated source title:Wuli Xuebao

Volume:62

Issue:6

Issue date:March 20, 2013

Publication year:2013

Article number:068702

Language:Chinese

ISSN:10003290

CODEN:WLHPAR

Document type:Journal article (JA)

Publisher:Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing, 100190, China

Abstract:To satisfy the need of low-dose and high-speed in practical application of hard X-ray differential phase contrast imaging, according to the theoretical analysis and the optimal design of parameters for the experimental system, we propose a two-stepping phase shift algorithm to retrieve the object phase information. The method can effectively reduce the radiation dose and substantially improve the speed of retrieving phase information, which lays the foundation for the X-ray phase contrast imaging in medical and industrial applications. © 2013 Chinese Physical Society.

Number of references:17

Main heading:X rays

Controlled terms:Algorithms - Industrial applications - Phase shift - Phase shifters

Uncontrolled terms:Differential phase contrast imaging - Experimental system - Grating interferometers - Optimal design - Phase information - Phase shift algorithms - Theoretical and experimental - X-ray phase-contrast imaging

Classification code:703.1 Electric Networks - 723 Computer Software, Data Handling and Applications - 913 Production Planning and Control; Manufacturing - 921 Mathematics - 932.1 High Energy Physics - 942.2 Electric Variables Measurements

DOI:10.7498/aps.62.068702

Database:Compendex

Accession number:20133616702277

Title:Optimized H.264 motion estimation algorithm based on UMHexagonS

Authors:Chen, Liu (1); Cao, Jian-Zhong (1); Tang, Li-Nao (1); Huang, Ji-Jiang (1); Guo, Hui-Nan (1); Dong, Xiao-Kun (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics Chinese Academy of Sciences, Xi'an, 710119, China; (2) University of Chinese Academy of Sciences, Beijing, 100039, China

Source title:Proceedings of the 2013 International Conference on Intelligent Control and Information Processing, ICICIP 2013

Abbreviated source title:Proc. Int. Conf. Intell. Control Inf. Process., ICICIP

Monograph title:Proceedings of the 2013 International Conference on Intelligent Control and Information Processing, ICICIP 2013

Issue date:2013

Publication year:2013

Pages:177-181

Article number:6568063

Language:English

ISBN-13:9781467362481

Document type:Conference article (CA)

Conference name:2013 4th International Conference on Intelligent Control and Information Processing, ICICIP 2013

Conference date:June 9, 2013 - June 11, 2013

Conference location:Beijing, China

Conference code:98950

Sponsor:University of Illinois at Chicago; National Natural Science Foundation of China

Publisher:IEEE Computer Society, 2001 L Street N.W., Suite 700, Washington, DC 20036-4928, United States

Abstract:H.264 has adoptedUMHexagonS algorithm as fast motion estimation algorithm for integer pixel formally, but this algorithm has some shortages such as searchpointsare lots, quantity of operation is kind of big, costs much time, and so on. These need to be solved as soon as possible. This paper introduces and analyses UMHexagonS algorithm. In order to solve these problems, this paper brings forwardclassification strategy for search algorithm according to statistical properties of the motion vector prediction value, and improvesthe template basedon original algorithm according to the characteristic of center bias of motion vector. The results of experimentsshow that the improved algorithm in this paper reduces the time of motion estimation by 15%&sim;27%. At the meantime, it can ensure PSNR and rate basically unchanged. © 2013 IEEE.

Number of references:12

Main heading:Motion estimation

Controlled terms:Algorithms - Data processing - Image compression - Intelligent control

Uncontrolled terms:Center bias - Fast motion estimation algorithm - H.264 motion estimations - Motion vector prediction - Original algorithms - Statistical properties - Umhexagons - UMHexagonS algorithm

Classification code:716.1 Information Theory and Signal Processing - 723 Computer Software, Data Handling and Applications - 921 Mathematics

DOI:10.1109/ICICIP.2013.6568063

Database:Compendex

Accession number:20132216369223

Title:An Yb3+-doped Lu<inf>2</inf>SiO<inf>5</inf> mode-locked laser using a reflective graphene oxide absorber

Authors:Feng, Chao (1); Liu, Jie (1); Wang, Yonggang (2); Zheng, Lihe (3); Su, Liangbi (3); Xu, Jun (3)

Author affiliation:(1) Shandong Provincial Key Laboratory of Optics and Photonic Device, College of Physics and Electronics, Shandong Normal University, Jinan 250014, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (3) Key Laboratory of Transparent and Opto-Functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, China

Source title:Laser Physics

Abbreviated source title:Laser Phys.

Volume:23

Issue:6

Issue date:June 2013

Publication year:2013

Article number:065802

Language:English

ISSN:1054660X

E-ISSN:15556611

Document type:Journal article (JA)

Publisher:Institute of Physics Publishing, Temple Circus, Temple Way, Bristol, BS1 6BE, United Kingdom

Abstract:Reflective graphene oxide played the part of the saturable absorber to achieve a continuous wave mode-locking (CWML) laser based on Yb 3+:Lu<inf>2</inf>SiO<inf>5</inf> (Yb:LSO) crystal for the first time. The laser operated at a repetition frequency of 87 MHz at a maximum average output power of 0.95 W with a single pulse energy of 10.9 nJ. A 9.8 ps ultra-short pulse was yielded at 1058 nm with a full width at half maximum (FWHM) of 2.09 nm, corresponding to a peak power of 1.11 kW. © 2013 Astro Ltd.

Number of references:27

Main heading:Saturable absorbers

Controlled terms:Mode-locked fiber lasers - Ytterbium

Uncontrolled terms:Average output power - Continuous Wave - Graphene oxides - Laser-based - Mode-locked laser - Modelocking - Repetition frequency - Single pulse energy

Classification code:547.2 Rare Earth Metals - 744.1 Lasers, General

DOI:10.1088/1054-660X/23/6/065802

Database:Compendex

Accession number:20130916062121

Title:Arbitrary waveform generator based on GaAS FET and tapered micro-strip line

Authors:Lin, Ping (1); Liu, Baiyu (1); Gou, Yongsheng (1); Bai, Yonglin (1); Wang, Bo (1); Zhao, Xueqing (3)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) Graduate University of the Chinese Academy of Sciences, Beijing 100049, China; (3) Northwest Institute of Nuclear Technology, Xi'an 710024, China

Corresponding author:Lin, P.(linping@opt.ac.cn)

Source title:Advanced Materials Research

Abbreviated source title:Adv. Mater. Res.

Volume:655-657

Monograph title:Engineering Solutions for Manufacturing Processes

Issue date:2013

Publication year:2013

Pages:1581-1586

Language:English

ISSN:10226680

ISBN-13:9783037856482

Document type:Conference article (CA)

Conference name:2012 3rd International Conference on Advances in Materials and Manufacturing Processes, ICAMMP 2012

Conference date:December 22, 2012 - December 23, 2012

Conference location:Beihai, China

Conference code:95671

Sponsor:University of Wollongong, Australia; Northeastern University, China; University of Science and Technology Beijing; Hong Kong Industrial Technology Research Centre

Publisher:Trans Tech Publications, P.O. Box 1254, Clausthal-Zellerfeld, D-38670, Germany

Abstract:In order to improve the output power of laser pulse in the inertia confinement fusion experiment, an arbitrary waveform generator is fabricated to shape the laser pulse. The arbitrary waveform generator is based on the impedance tapered micro-strip line technology and GaAs Field Effect Transistor set which has a good ability of generating voltage-controlled current. With the impedance tapered micro-strip line technology, the arbitrary waveform generator generates shaping electrical pulse with duration less than 10 ns, 330 ps time-domain adjustment. We use the shaping electrical pulse to modulate semiconductor laser which has the characteristic of direct modulate, the experiment results show the shaped laser pulse is obtained based on the shaping electrical pulse. © (2013) Trans Tech Publications, Switzerland.

Number of references:15

Main heading:Pulse shaping

Controlled terms:Experiments - Field effect transistors - Industrial engineering - Laser pulses - Microstrip lines - Production engineering - Pulse generators - Semiconducting gallium - Semiconductor lasers - Waveform analysis

Uncontrolled terms:Arbitrary waveform generator - Electrical pulse - Fusion experiments - GaAs - GaAs-FET - Microstripes - On-off characteristic - Output power - Shaped laser pulse - Time domain - Voltage-controlled

Classification code:921 Mathematics - 913.1 Production Engineering - 912.1 Industrial Engineering - 901.3 Engineering Research - 744.1 Lasers, General - 716 Telecommunication; Radar, Radio and Television - 714.2 Semiconductor Devices and Integrated Circuits - 713.4 Pulse Circuits - 712.1.1 Single Element Semiconducting Materials

DOI:10.4028/www.scientific.net/AMR.655-657.1581

Database:Compendex

Accession number:20130615999573

Title:Theoretical research on time-space conversion method for measuring ultra-short electron pulse width

Authors:Wu, Jianjun (1); Yuan, Ximing (1); Zhao, Baosheng (3); Tian, Jinshou (3); Li, Junke (1)

Author affiliation:(1) Jiangsu Research and Development Center of Application Technology for Wireless Sensing System, Wuxi 214153, China; (2) Wuxi Institute of Commence, Wuxi 214153, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710068, China

Corresponding author:Wu, J.(wjj1100@yahoo.com.cn)

Source title:Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams

Abbreviated source title:Qiangjiguang Yu Lizishu

Volume:25

Issue:2

Issue date:February 2013

Publication year:2013

Pages:517-521

Language:English

ISSN:10014322

CODEN:QYLIEL

Document type:Journal article (JA)

Publisher:Editorial Office of High Power Laser and Particle Beams, P.O. Box 919-805, Mianyang, 621900, China

Abstract:The transmission characteristics of ultra-short electron beams of the ultra-fast electron guns in scanning state were analysed, and the deflection distance of the ultra-short electron beams passing the deflection-scan system was calculated. The results indicate that the initial voltage must be within the range of 700-1400 V to counterbalance the effect of the negative scan slope voltage, ensuring that the electron beams will pass the deflection-scan system and finally hit the phosphor screen of 30 mm in diameter, and the cooperative function of the initial voltage and the negative scan slope voltage is one of the two premises of the scan experiment. The other premise is the synchronization of the electrical and the optical signals. Following the discussion of the great difficulty caused by the first promise, an experimental system that can adjust the optical delay more effectively in the scan experiment was designed, which can facilitate the synchronization of the negative scan slope voltage and the ultra-fast electron pulse.

Number of references:10

Main heading:Deflection (structures)

Controlled terms:Electron beams - Electron guns - Experiments - Optical communication - Synchronization

Uncontrolled terms:Deflection-scan system - Electron pulse - Experimental system - Optical delay - Optical signals - Phosphor screens - Theoretical research - Time-space conversion - Transmission characteristics - Ultra-fast

Classification code:421 Strength of Building Materials; Mechanical Properties - 714.1 Electron Tubes - 717.1 Optical Communication Systems - 901.3 Engineering Research - 932 High Energy Physics; Nuclear Physics; Plasma Physics - 961 Systems Science

DOI:10.3788/HPLPB20132502.0517

Database:Compendex

Accession number:20134316894231

Title:An all-optical multi-wavelength encryption system

Authors:Duan, Jie (1); Wen, Yu (1); Duan, Tao (2); Xie, Xiao-Ping (1)

Corresponding author:Xie, X.-P.

Source title:Guangdianzi Jiguang/Journal of Optoelectronics Laser

Abbreviated source title:Guangdianzi Jiguang

Volume:24

Issue:9

Issue date:September 2013

Publication year:2013

Pages:1708-1713

Language:Chinese

ISSN:10050086

CODEN:GUJIE9

Document type:Journal article (JA)

Publisher:Board of Optronics Lasers, No. 47 Yang-Liu-Qing Ying-Jian Road, Tian-Jin City, 300380, China

Abstract:In order to encrypt multi-wave input signals simultaneously, according to the analysis of the effect of light interference, we conclude that XOR encrypting operation can be realized by the interference of two coherent optical signals one of which is given pi phase shift before they combining. According to this conclusion, an all-optical encryption system which can be used in wavelength division multiplexing (WDM) system and encrypting multi-wavelength optical signals is proposed. This scheme achieves multi-wave length coherent optical signals and optical keys by direct electro-optics modulation, and achieves pi phase shift of multi-wavelength optical keys by phase shifter, then the XOR encrypting operation for optical signals can be realized by the combining and interferring of optical signal and key which have the same wavelength, and then the multi-wavelength encrypted result is output. The feasibility and effectiveness of this system are confirmed by the simulation of encrypting operation of 8 × 10 Gbit/ps WDM signals. The bit error rate (BER) and Q factor of encrypting output are 0 and 164, respectively. Moreover, this paper analyzes the Q factors of encryption output at different duty cycles of input signals. When the duty cycle of input signal is smaller than 0.43, the Q factor of encrypted result is about 164.

Number of references:18

Main heading:Cryptography

Controlled terms:Optical signal processing - Phase shift - Phase shifters - Q factor measurement - Wave interference - Wavelength - Wavelength division multiplexing

Uncontrolled terms:Coherent optical - Encryption system - Multiwavelength - Optical signals - Q-factors

Classification code:723 Computer Software, Data Handling and Applications - 718 Telephone Systems and Related Technologies; Line Communications - 717 Optical Communication - 942.2 Electric Variables Measurements - 716 Telecommunication; Radar, Radio and Television - 703.1 Electric Networks - 703 Electric Circuits - 711 Electromagnetic Waves

Database:Compendex

Accession number:20133516678426

Title:Optimization design and calibration of a high dynamic range X-ray streak camera

Authors:Li, Tao (1); Xu, Xiangyan (1); Cao, Xibin (1); Tian, Jinshou (1); Wen, Wenlong (1); Liu, Hulin (1); Zou, Wei (1); Dong, Gaiyun (1); Wang, Junfeng (1); Wang, Chao (1); Zhang, Tie (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics And Precision Mechanics of Chinese Academy of Sciences, Xi'an, Shannxi 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Li, T.(s09058@opt.cn)

Source title:Guangxue Xuebao/Acta Optica Sinica

Abbreviated source title:Guangxue Xuebao

Volume:33

Issue:SUPPL.1

Issue date:June 2013

Publication year:2013

Article number:s112007

Language:Chinese

ISSN:02532239

CODEN:GUXUDC

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:A kind of cylinder-type electrode and high dynamic range X-ray streak camera has been optimally designed and developed. By improving the accelerating field, optimizing electronic optical system, the spatial and temporal characteristics of the electronic optical system is obtained with the modulation transfer function (MTF). By using the gold cathode (Au) and the large dynamic microchannel plate (MCP), the streak tube's dynamic range is further enlarged. Experimental test is carried out by Nd: YLF laser (8 ps) and dynamic scanning circuit, and the results show that the dynamic range is more than 1000, the time resolution is less than 14 ps, and the dynamic spatial resolution is over the 15 lp/mm. This indicates that the performance of the streak tube receches the design requirements and meet the demand of the ultrafast diagnostics. Meanwhile, the optimization direction and the program design is correct.

Number of references:13

Main heading:Streak cameras

Controlled terms:Design - Image resolution - Image storage tubes - Optical systems - Optimization - X rays

Uncontrolled terms:Dynamic range - Dynamic spatial - Electronic optical system - Micro channel plate - Temporal characteristics - Time resolution - Ultrafast diagnostics - X-ray streak cameras

Classification code:921.5 Optimization Techniques - 742.2 Photographic Equipment - 742 Cameras and Photography - 932.1 High Energy Physics - 741.3 Optical Devices and Systems - 714.1 Electron Tubes - 408 Structural Design - 741 Light, Optics and Optical Devices

DOI:10.3788/AOS201333.s112007

Database:Compendex

Accession number:20131416168166

Title:Broadband, low-loss, dispersion flattened porous-core photonic bandgap fiber for terahertz (THz)-wave propagation

Authors:Liang, Jian (1); Ren, Liyong (1); Chen, Nana (1); Zhou, Changhe (2)

Corresponding author:Ren, L.(renliy@opt.ac.cn)

Source title:Optics Communications

Abbreviated source title:Opt Commun

Volume:295

Issue date:May 15, 2013

Publication year:2013

Pages:257-261

Language:English

ISSN:00304018

CODEN:OPCOB8

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:By intentionally combining the porous fiber and the air-core photonic bandgap fiber, a kind of porous-core photonic bandgap fiber for guiding terahertz (THz) wave is proposed in this paper. THz wave in a frequency range from 0.98 THz to 1.15 THz can be well concentrated in the fiber core region with a low loss. Compared with the air-core photonic bandgap fiber, this kind of fiber can also provide a broader bandwidth and a much more flattened dispersion. Numerical simulations are performed by the plane wave expansion method and the finite element method. © 2013 Elsevier B.V.

Number of references:27

Main heading:Terahertz waves

Controlled terms:Dispersion (waves) - Fibers - Finite element method - Photonic bandgap fibers - Wave propagation

Uncontrolled terms:Fiber cores - Flattened dispersion - Frequency ranges - Plane wave expansion method - Porous fibers - Terahertz - THz - THz waves

Classification code:711 Electromagnetic Waves - 711.1 Electromagnetic Waves in Different Media - 812 Ceramics, Refractories and Glass - 817 Plastics and Other Polymers: Products and Applications - 921.6 Numerical Methods - 951 Materials Science

DOI:10.1016/j.optcom.2013.01.010

Database:Compendex

Accession number:20131816286148

Title:An adaptive two-point non-uniformity correction algorithm based on shutter and its implementation

Authors:Wang, Huawei (1); Ma, Caiwen (1); Cao, Jianzhong (1); Zhang, Haifeng (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an Shaanxi , 710119, China; (2) University of Chinese Academy of Sciences, Beijing, 100039, China

Corresponding author:Wang, H.(whw@opt.ac.cn)

Source title:Proceedings - 2013 5th Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2013

Abbreviated source title:Proc. - Conf. Meas. Technol. Mechatronics Autom., ICMTMA

Monograph title:Proceedings - 2013 5th Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2013

Issue date:2013

Publication year:2013

Pages:174-177

Article number:6493696

Language:English

ISBN-13:9780769549323

Document type:Conference article (CA)

Conference name:2013 5th Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2013

Conference date:January 16, 2013 - January 17, 2013

Conference location:Hong Kong, China

Conference code:96678

Sponsor:Central South University; Harbin Engineering University

Publisher:IEEE Computer Society, 2001 L Street N.W., Suite 700, Washington, DC 20036-4928, United States

Abstract:Because of the non-uniform response of infrared focal plane arrays (IRFPA), non-uniformity correction is a key technology in IRFPA application. The two-point correction algorithm is widely used in practical applications, but there are some disadvantages. The detector's response will drift with time and temperature, correction parameters will drift with this accordingly. In order to acquire good quality images, the correction parameters need to be recalibrated periodically. It is inconvenient for user. This paper proposed an adaptive non-uniformity correction algorithm based on the two-point correction, which can update the correction parameters automatically. And this paper else introduced the approach of the algorithm. Results showed that the algorithm is effective to compensate the response drift influenced by time and temperature. © 2013 IEEE.

Number of references:6

Main heading:Algorithms

Controlled terms:Electric power factor correction - Mechanical engineering - Mechatronics

Uncontrolled terms:Adaptive - Infrared focal plane arrays - IRFPA - Key technologies - Nonuniformity - Nonuniformity correction - Shutter - Two-point correction

Classification code:608 Mechanical Engineering, General - 706 Electric Transmission and Distribution - 723 Computer Software, Data Handling and Applications - 921 Mathematics

DOI:10.1109/ICMTMA.2013.51

Database:Compendex

Accession number:IP52402928

Title:Retraction notice to 'Monomode optical planar and channel waveguides in Yb3+-doped silicate glasses formed by helium ion implantation' [Opt. Laser Technol. 44/8 (2012) 2323-2326] (DOI:10.1016/j.optlastec.2012.04.033)

Authors:Liu, Chun-Xiao (1); Cheng, Shu (1); Zhao, Jin-Hua (1); Li, Wei-Nan (1); Wei, Wei (1); Peng, Bo (1)

Author affiliation:(1) School of Electronic and Information Engineering, Hefei Normal University, Hefei 230601, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences (CAS), Xi'an 710119, China; (3) Changchun University of Science and Technology, Changchun 130022, China; (4) School of Science, Shandong Jianzhu University, Jinan 250101, China; (5) Key Laboratory for Organic Electronics and Information Displays (KLOEID) and Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, Nanjing 210046, China

Corresponding author:Liu, C.-X.

Source title:Optics and Laser Technology

Abbreviated source title:Opt Laser Technol

Issue date:2013

Publication year:2013

Language:English

ISSN:00303992

CODEN:OLTCAS

Document type:Article in Press

Main heading:Ytterbium

Controlled terms:Silicates

Uncontrolled terms:Channel waveguide - Helium ion - Silicate glass

Classification code:414 Masonry Materials - 547.2 Rare Earth Metals - 812 Ceramics, Refractories and Glass

DOI:10.1016/j.optlastec.2012.12.014

Database:Compendex

Accession number:20132716458309

Title:Effective medium theory for two-dimensional random media composed of core-shell cylinders

Authors:Zhang, Hao (1); Shen, Yongqiang (1); Xu, Yuchen (1); Zhu, Heyuan (1); Lei, Ming (2); Zhang, Xiangchao (1); Xu, Min (1)

Author affiliation:(1) Shanghai Engineering Center for Ultra-Precision Optical Manufacturing, Department of Optical Science and Engineering, Fudan University, Shanghai 200433, China; (2) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Zhang, H.(zhangh@fudan.edu.cn)

Source title:Optics Communications

Abbreviated source title:Opt Commun

Volume:306

Issue date:2013

Publication year:2013

Pages:9-16

Language:English

ISSN:00304018

CODEN:OPCOB8

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:In this paper, based on the generalized coated coherent potential approximation method, we derive the mathematical formulae, for the extended effective medium theory, to investigate the optical properties of disordered media composed of core-shell cylinders. The effective indices of such media are obtained in the long-wavelength limit and in the Mie-scattering region. Moreover, we use this method to study optical properties of random media composed of core-shell cylinders with the core layer consisting of epsilon-less-than-one material. © 2013 Elsevier B.V. All rights reserved.

Number of references:29

Main heading:Cylinders (shapes)

Controlled terms:Diffusion - Optical properties - Random processes

Uncontrolled terms:Coherent potential approximation - Disordered media - Effective index - Effective medium theories - Long-wavelength limits - Mathematical formulas - Mie scattering - Random media

Classification code:408.2 Structural Members and Shapes - 741.1 Light/Optics - 922.1 Probability Theory - 931.1 Mechanics

DOI:10.1016/j.optcom.2013.05.027

Database:Compendex

Accession number:20141017419575

Title:Computational imaging technology for high-sensitivity space-image acquisition

Authors:Sun, Jinqiu (1); Li, Haisen (1); Zhang, Haichao (1); Zhang, Yanning (1); Wen, Desheng (2)

Author affiliation:(1) Institute of Precision Guidance and Control, Northwestern Polytechnical University, Xi'an 710072, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an 710119, China

Corresponding author:Sun, J.(sunjinqiu@nwpu.edu.cn)

Source title:Chinese Optics Letters

Abbreviated source title:Chin. Opt. Lett.

Volume:11

Issue:11

Issue date:November 2013

Publication year:2013

Article number:111101

Language:English

ISSN:16717694

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:Acquiring deep-space images with high spatial resolution and sensitivity is important for space-debris surveillance and early warning. We propose a novel computational imaging (CI) method for high-sensitivity image acquisition in this letter. The proposed approach introduces CI into image formation. The proposed capturing process conducts minor modifications for cameras to encode more desirable information during capture, which is practical for hardware implementation. The latent image is reconstructed by formulating a recovery problem into an optimization problem, which is solved with iteratively reweighted least square technique. The experimental results clearly show the effectiveness of the proposed method. © 2013 Chinese Optics Letters.

Number of references:14

Main heading:Space debris

Controlled terms:Hardware - Image acquisition - Iterative methods

Uncontrolled terms:Computational imaging - Early warning - Hardware implementations - High spatial resolution - High-sensitivity - Iteratively reweighted least squares - Latent images - Optimization problems

Classification code:605 Small Tools and Hardware - 655.1 Spacecraft, General - 723 Computer Software, Data Handling and Applications - 921.6 Numerical Methods

DOI:10.3788/COL201311.111101

Database:Compendex

Accession number:20141317516374

Title:Effect of the fringe visibility on spectrum SNR of Fourier transform imaging spectrometer

Authors:Wang, Shuang (1); Xiangli, Bin (3); Jing, Juanjuan (1); Pi, Haifeng (1)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technique, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) Graduate School of the Chinese Academy of Sciences, Beijing 100049, China; (3) Academy of Opto-Electronics, Chinese Academy of Science, Beijing 100094, China

Corresponding author:Wang, S.(darkgrass@opt.ac.cn)

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8910

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Spectrometer Technologies and Applications

Issue date:2013

Publication year:2013

Article number:89100W

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497796

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:The principle of Fourier transform spectrometer is based on the relationship of Fourier-Transform between interferogram and spectrum. The spectral information of Fourier transform imaging spectrometer (FTIS) reconstructed from raw interferogram by data processing. So there are two kinds of signal-to-noise ratio (SNR) to evaluate instrument performance, one regarding interferogram and the other regarding reconstructed spectrum. Because the raw interferogram is intuitive, the interferogram SNR is studied usually. On the contrary, the spectrum SNR is studied less because of the complexity of the data processing from interferogram to spectrum. The research about the effect of the interference fringe visibility on the spectrum SNR is especially few. This paper present a research work on the relations between the interference fringe visibility and the spectrum SNR. Firstly, the reduction of fringe visibility caused by imaging lens defocus was analyzed. Secondly, the changes of the average spectrum signal and noise caused by the reduction of fringe visibility were calculated. For average spectrum signal, the math deductions are done base on Fourier transform theory. The average noise with different input signal optic-electrons number are simulated. the results show that the average spectrum signal is directly proportional to the fringe visibility, and the effect of fringe visibility on the noise related to signal can be ignorable. Finally, In order to demonstrate above results, the imaging experiment was done with white-light source, using LASIS (Large aperture static imaging spectrometer) based on Sagnac Interferometer. The average spectrum SNRs under different fringe visibility are calculated and analyzed. The experimental results show that: the average spectrum SNRs increase from 42.7 to 62.4. along with the fringe visibility increasing from 0.5051 to 0.687. the reconstructed spectrum SNR is directly proportional to the fringe visibility. As a result, the interferogram fringe visibility can be used to estimate the reconstructed spectrum SNR, and evaluate the performance of FTIS before data processing. © 2013 SPIE.

Number of references:12

Main heading:Visibility

Controlled terms:Data processing - Interferometry - Light sources - Remote sensing - Signal detection - Signal to noise ratio - Spectrometers

Uncontrolled terms:Fourier transform imaging spectrometers - Fourier transform spectrometers - Fourier transform theory - Fringe visibilities - Instrument performance - Sagnac interferometer - Signaltonoise ratio (SNR) - Spectrum SNR

Classification code:716.1 Information Theory and Signal Processing - 723.2 Data Processing and Image Processing - 731.1 Control Systems - 741.2 Vision - 744 Lasers - 801 Chemistry - 941.4 Optical Variables Measurements

DOI:10.1117/12.2032912

Database:Compendex

Accession number:20135017079665

Title:Off-axis digital holographic microscopy with LED illumination based on polarization filtering

Authors:Guo, Rongli (1); Yao, Baoli (1); Gao, Peng (1); Min, Junwei (1); Zhou, Meiling (1); Han, Jun (2); Yu, Xun (2); Yu, Xianghua (1); Lei, Ming (1); Yan, Shaohui (1); Yang, Yanlong (1); Dan, Dan (1); Ye, Tong (1)

Corresponding author:Yao, B.(yaobl@opt.ac.cn)

Source title:Applied Optics

Abbreviated source title:Appl. Opt.

Volume:52

Issue:34

Issue date:December 1, 2013

Publication year:2013

Pages:8233-8238

Language:English

ISSN:1559128X

E-ISSN:15394522

CODEN:APOPAI

Document type:Journal article (JA)

Publisher:Optical Society of American (OSA)

Abstract:A reflection mode digital holographic microscope with light emitting diode (LED) illumination and offaxis interferometry is proposed. The setup is comprised of a Linnik interferometer and a grating-based 4f imaging unit. Both object and reference waves travel coaxially and are split into multiple diffraction orders in the Fourier plane by the grating. The zeroth and first orders are filtered by a polarizing array to select orthogonally polarized object waves and reference waves. Subsequently, the object and reference waves are combined again in the output plane of the 4f system, and then the hologram with uniform contrast over the entire field of view can be acquired with the aid of a polarizer. The one-shot nature in the off-axis configuration enables an interferometric recording time on a millisecond scale. The validity of the proposed setup is illustrated by imaging nanostructured substrates, and the experimental results demonstrate that the phase noise is reduced drastically by an order of 68% when compared to a He-Ne laser-based result. © 2013 Optical Society of America.

Number of references:40

Main heading:Light emitting diodes

Controlled terms:Diffraction gratings - Interferometry - Microscopic examination - Polarization

Uncontrolled terms:Digital holographic microscopy - LED illumination - Linnik interferometer - Multiple diffraction - Nanostructured substrates - Polarization filtering - Reference waves - Reflection modes

Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems - 941.4 Optical Variables Measurements

DOI:10.1364/AO.52.008233

Database:Compendex

Accession number:20141317510175

Title:A new infrared image processing method based on compressed sensing

Authors:Mu, Chenhao (1); Qiu, Yuehong (1); Chen, Zhi (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing, 100049, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8907

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications

Issue date:2013

Publication year:2013

Article number:89073F

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497765

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:In order to improve the efficiency of processing the large amount of data of infrared image, in this paper we develop a new infrared image processing method based on compressed sensing (CS) and simulate the method. The basic idea behind CS is that a signal or image, unknown but supposed to be compressible by a known transform, (eg. wavelet), can be subjected to fewer measurements than the nominal number of pixels, and yet be accurately reconstructed. According to the properties of wavelet transform sub-bands, firstly we make wavelet transform which change the infrared image into a wavelet coefficients matrix. Acquired the features of infrared image, the characters of the wavelet coefficients can be concluded. When deeply analyzing the data of the wavelet coefficient, we can easily find the high-pass wavelet coefficients of the image are sparse enough to measure, while the low-pass wavelet coefficients are not appropriate for measure. So in this second part, only measured the high-pass wavelet coefficients of the image but preserving the low-pass wavelet coefficients. For the reconstruction, the third part, by using the orthogonal matching pursuit (OMP) algorithm, high-pass wavelet coefficients could be recovered by the measurements. Finally the image could be reconstructed by the inverse wavelet transform. The simulation proves that applying the CS theory to the realm of infrared picture can decrease the amount of data which must be collected. Besides, compared with the original compressed sensing algorithm, simulation results demonstrated that the proposed algorithm improved the quality of the recovered image significantly. © 2013 Copyright SPIE.

Number of references:10

Main heading:Wavelet transforms

Controlled terms:Algorithms - Compressed sensing - Image matching - Image processing - Infrared imaging - Signal reconstruction - Thermography (imaging)

Uncontrolled terms:Compressive sensing - High-pass - Inverse wavelet transforms - Large amounts - Low-pass - Orthogonal matching pursuit - Wavelet coefficients

Classification code:716.1 Information Theory and Signal Processing - 723 Computer Software, Data Handling and Applications - 741 Light, Optics and Optical Devices - 742.1 Photography - 746 Imaging Techniques - 921 Mathematics - 921.3 Mathematical Transformations

DOI:10.1117/12.2033567

Database:Compendex

Accession number:20141317516407

Title:The generating mechanism of strips and destriping algorithm of HJ-1A hyperspectral image

Authors:Gao, Xiao-Hui (1); Xu, Guang-Hui (2); Yu-Tao (1); Wei, Ru-Yi (1)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology, Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics, Xi'an 710119, China; (2) Xi'an Aerotechnical College, Xi'an 710077, China

Corresponding author:Gao, X.-H.

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8910

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Spectrometer Technologies and Applications

Issue date:2013

Publication year:2013

Article number:89101U

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497796

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:Hyperspectral remote sensing images are affected by different types of noise. In addition to typical random noise, nonperiodic partially deterministic disturbance patterns appear in the data. The strips usually found in images acquired by push-broom sensors, which are characterized by a high degree of spatial and spectral coherence. Many strips-reduction approaches such as histogram matching and moment matching have been developed. These methods assume that all sensor elements observe similar subscenes in a given image and adjust the distributions of values acquired by each sensor to some reference distribution by means of a histogram or moment matching, but this assumption usually is failure in many scenes which contain diverse materials. The formation of strips has close connection with the image formation process of push-broom imaging spectrometers. Many causes such as the uniformity of the pixels, the push-broom mode and the asymmetric width of thin slit at the entrance of imaging spectrometers can induce the strips in the images. Comparing with the dispersive spectrometers, interferometer spectrometers acquire the interference data, obtaining the spectrum by using the Fast Fourier Transformation (FFT). By analyzing the generating mechanism of strips in push-broom interferometer imaging spectrometers, we proposed an approach that corrects the strips using relative calibration factor directly computed from the acquired image. Once the relative calibration factor is determined, all the images acquired by the same imaging spectrometers can be corrected. So the methodology is an efficient one to reduce the strips. A formula is set up to describe the connection between gray values of pixels in images and relative calibration factor. The developed methodology is tested on data acquired by HJ-1A Hyperspectral Imaging Spectrometers, which is an interferometer spectrometer put into operation in 2008. The shortwave bands of HJ-1A HSI have severe strips. Results show excellent rejection of the noise with respect to the original HJ-1A HSI images, improving the removal in those scenes with diverse materials as well as being high efficient. © 2013 SPIE.

Number of references:8

Main heading:Image matching

Controlled terms:Calibration - Graphic methods - Image reconstruction - Interferometers - Pixels - Sensors - Spectrometers - Spectroscopy

Uncontrolled terms:Destriping - Hyperspectral remote sensing - Push-broom - Spatial Modulated - Spectral imaging

Classification code:723.5 Computer Applications - 741 Light, Optics and Optical Devices - 801 Chemistry - 902.1 Engineering Graphics - 941 Acoustical and Optical Measuring Instruments - 941.3 Optical Instruments - 942 Electric and Electronic Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments

DOI:10.1117/12.2034763

Database:Compendex

Accession number:20135117103927

Title:Multi-shape infrared target detection algorithm based on Markov Random Field

Authors:Xue, Yong-Hong (1); Zhang, Tao (2); Chen, Rong-Li (3); An, Wei (1); Zhang, Yin-Sheng (2)

Author affiliation:(1) College of Electronic Science and Engineering, National University of Defense Technology, Changsha, Hunan 410073, China; (2) Beijing Institute of Tracking and Telecommunication Technology, Beijing 100094, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Xue, Y.-H.(sanger_xue@126.com)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:42

Issue:10

Issue date:October 2013

Publication year:2013

Pages:1231-1237

Language:English

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:The problem of shape target detection was formulated as a binary classification problem of each pixel under Markov Random Field (MRF)theoretical framework and the adaptive neighborhood system of MRF was introduced. Firstly, the factors that cause the changing of target shapes were analyzed and classic target shapes presented on obtained infrared images were concluded. Secondly, the classic shapes were used as templates while establishing the new neighborhood system of MRF. Thirdly, to achieve the optimal detection performance, a criterion function for adaptively selecting the proper neighborhood for each pixel was proposed and at last a new potential function using finite difference operator was proposed for the classification of target and background at each pixel. For the usage of adaptive neighborhood system, the proposed algorithm has following advantages: further reduction of the threshold crossing rate of target detection in single image frame while maintaining the target detection rate and better preservation of target shape details than algorithms using classic neighborhood system of MRF. By simulations and experiments, the results show that the proposed algorithm can optimally detect targets under various image Signal-to-clutter ratios, and perfectly protect target shape details.

Number of references:12

Main heading:Structural frames

Controlled terms:Algorithms - Electron emission - Infrared imaging - Markov processes - Pixels

Uncontrolled terms:Adaptive neighborhood - Binary classification problems - Finite difference operators - Infrared systems - Infrared target detection - Markov Random Fields - Signal-to-clutter ratios - Theoretical framework

Classification code:932.2 Nuclear Physics - 922.1 Probability Theory - 921 Mathematics - 746 Imaging Techniques - 723.5 Computer Applications - 723 Computer Software, Data Handling and Applications - 408.2 Structural Members and Shapes

DOI:10.3788/gzxb20134210.1231

Database:Compendex

Accession number:20131416181500

Title:Slow light engineering in periodic-stub-assisted plasmonic waveguide

Authors:Wang, Guoxi (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Wang, G.(wangguoxi@opt.cn)

Source title:Applied Optics

Abbreviated source title:Appl. Opt.

Volume:52

Issue:9

Issue date:March 20, 2013

Publication year:2013

Pages:1799-1804

Language:English

ISSN:1559128X

E-ISSN:15394522

CODEN:APOPAI

Document type:Journal article (JA)

Publisher:Optical Society of America, 2010 Massachusetts Ave, NW, Washington, DC, DC 20036-1023, United States

Abstract:We investigate the slow light engineering in periodic-stub-assisted plasmonic waveguide based on transmission line theory. It is found that the dispersion relationship of the proposed waveguide can be easily modified by tuning the stub depth and the period. The theoretical results show that a large normalized delay bandwidth product of 0.65 can be achieved at 1550nm, meanwhile maintaining the group index of 35. In addition, the proposed waveguide shows 'S-shaped' dispersion curve, which implies that the group velocity dispersion parameter at the inflection point equals zero and a dispersion-free slow light waveguide can be realized. Due to the excellent buffering capacity, the proposed compact configuration can find important applications on optical buffers in highly integrated optical circuits. © 2013 Optical Society of America.

Number of references:34

Main heading:Slow light

Controlled terms:Dispersions - Group velocity dispersion - Optical waveguides - Waveguides

Uncontrolled terms:Buffering capacities - Dispersion curves - Dispersion relationship - Group velocities - Inflection points - Integrated optical circuit - Plasmonic waveguides - Theoretical result

Classification code:711 Electromagnetic Waves - 714.3 Waveguides - 741 Light, Optics and Optical Devices - 741.1 Light/Optics - 751 Acoustics, Noise. Sound - 951 Materials Science

DOI:10.1364/AO.52.001799

Database:Compendex

Accession number:20134216857653

Title:Research on the method of fast photoelectric diagnostics based on ordinary CCD

Authors:Zhu, Bingli (1); Bai, Yonglin (1); Liu, Baiyu (2); Wang, Bo (2); Bai, Xiaohong (2); Gou, Yongsheng (1); Qin, Junjun (2); Yang, Wenzheng (2)

Author affiliation:(1) Key Laboratory of Ultrafast Photoelectric Diagnostic Technology, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8908

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Sensors and Applications

Issue date:2013

Publication year:2013

Article number:89080R

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497772

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:A novel method to realize fast photoelectric diagnostics using ordinary CCD is presented. By changing the mode of charge transfer of CCD, fast photoelectric diagnostics of single point with linear CCD and high-speed line scanning with array CCD can be achieved respectively. A fast photoelectric diagnostics system of single point based on linear CCD has been designed and fabricated to investigate the feasibility of this method. A pulsed blue light emitting diode (LED) has been used to measure the system. As a proof of concept, the rate of photoelectric diagnostics of single point reachs up to 20 MHz. The results demonstrated that the method of fast photoelectric diagnostics based on ordinary CCD is feasible. © 2013 SPIE.

Number of references:14

Main heading:Photoelectricity

Controlled terms:Charge coupled devices - Light emitting diodes

Uncontrolled terms:Array CCD - Blue light emitting diodes - High speed imaging - High speed lines - Linear CCD - Proof of concept - Single point - Ultra high speed

Classification code:714.2 Semiconductor Devices and Integrated Circuits - 741.1 Light/Optics

DOI:10.1117/12.2032841

Database:Compendex

Accession number:20124815740800

Title:Effects of Al<inf>2</inf>O<inf>3</inf> on the thermal stability, glass configuration of Yb3 +-doped TeO<inf>2</inf>-K<inf>2</inf>O-ZnO- Al<inf>2</inf>O<inf>3</inf> based tellurite laser glasses

Authors:Wang, Pengfei (1); Wang, Cuicui (2); Li, Weinan (1); Lu, Min (1); Peng, Bo (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) Key Laboratory for Organic Electronics and Information Displays, Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, Nanjing 210046, China

Corresponding author:Peng, B.(bpengcas@yahoo.cn)

Source title:Journal of Non-Crystalline Solids

Abbreviated source title:J Non Cryst Solids

Volume:359

Issue:1

Issue date:January 1, 2013

Publication year:2013

Pages:5-8

Language:English

ISSN:00223093

CODEN:JNCSBJ

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:A novel of Yb3 +-doped TeO<inf>2</inf>-K<inf>2</inf>O-ZnO- Al<inf>2</inf>O<inf>3</inf>-based tellurite glasses with both good thermal stability and high-emission cross-section was prepared by verifying Al <inf>2</inf>O<inf>3</inf> additions. The changes in the thermal stability parameter ΔT (= T<inf>x</inf> - T<inf>g</inf>) and glass network configuration were investigated using differential scanning calorimeter (DSC) and Raman spectra measurements. DSC results show that the investigated tellurite glasses have favorite thermal stability for fiber drawing, and the maximum value of ΔT is up to 150°C. Raman spectra analysis indicates that the introduction of Al<inf>2</inf>O<inf>3</inf> changes the polyhedron structural units of Te from TeO<inf>4</inf> to TeO<inf>3 + 1</inf>, and in a further step to TeO<inf>3</inf> configuration. The substitution of ZnO by Al <inf>2</inf>O<inf>3</inf> increases the glass's network connectivity, resulting in improvement of the glass's thermal stability and increase of the emission cross-section of Yb3 + ions in the glasses. © 2012 Elsevier B.V.

Number of references:25

Main heading:Glass

Controlled terms:Aluminum - Differential scanning calorimetry - Geometry - Lasers - Raman scattering - Tellurium compounds - Thermodynamic stability - Ytterbium - Zinc oxide

Uncontrolled terms:Differential scanning calorimeters - Emission cross-section - Fiber drawing - Glass network - Laser glass - Network connectivity - Spectra analysis - Spectra measurements - Stability parameters - Structural unit - Tellurite glass - ZnO

Classification code:812.3 Glass - 804.2 Inorganic Compounds - 744.1 Lasers, General - 921 Mathematics - 741.1 Light/Optics - 547.2 Rare Earth Metals - 541.1 Aluminum - 641.1 Thermodynamics

DOI:10.1016/j.jnoncrysol.2012.09.031

Database:Compendex

Accession number:20133216576151

Title:Development of streak camera with anisotropic focusing electron optical system

Authors:Tian, J. (1); Ding, Y. (2); Cao, X. (1); Liu, S. (2); Xu, X. (1); Hu, X. (2); Wen, W. (1); Wang, J. (1); Wang, C. (1); Liu, H. (1); Dong, G. (1); Zhang, T. (1); Lu, Y. (1); Wang, X. (1); Liu, J. (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) Research Center of Laser Fusion, CAEP, P. O. Box 919-986, Mianyang 621900, China; (3) Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8796

Monograph title:2nd International Symposium on Laser Interaction with Matter, LIMIS 2012

Issue date:2013

Publication year:2013

Article number:87960Z

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819496393

Document type:Conference article (CA)

Conference name:2nd International Symposium on Laser Interaction with Matter, LIMIS 2012

Conference date:September 9, 2012 - September 12, 2012

Conference location:Xi'an, Shaanxi, China

Conference code:97999

Sponsor:Northwest Institute of Nuclear Technology; Mechanics and Physics; Chinese Optical Society; European Laser Institute; The Optical Society

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:In this paper, the anisotropic focusing technique is used to make a novel streak tube. The salient features are the introduction of both temporally focusing electrodes and spatially focusing electric quadrupole lens. The simulation showed that physical temporal dispersion of 0.38 ps and edge spatial resolution of 56 lp/mm can be achieved. The Nd:YLF 8ps pulse laser was used to calibrate the performance index of streak camera. The static and dynamic spatial resolutions are 35 lp/mm and 25 lp/mm respectively. The dynamic range more than 950:1 and time resolution 8ps can be reached. Furthermore, the magnifications in slit and scanning direction can be adjusted respectively, so it is very convenient to select amplification needed when it is coupled with KB microscope. © 2013 SPIE.

Number of references:12

Main heading:Streak cameras

Controlled terms:Anisotropy - Focusing - Laser tissue interaction - Optical systems - Optical transfer function - Plasma interactions - YLF lasers

Uncontrolled terms:Dynamic range - Electric quadrupoles - Electron optical system - Focusing technique - Performance indices - Salient features - Spatial resolution - Temporal dispersion

Classification code:932.3 Plasma Physics - 931.2 Physical Properties of Gases, Liquids and Solids - 744.8 Laser Beam Interactions - 744.4.1 Semiconductor Lasers - 742.2 Photographic Equipment - 741.3 Optical Devices and Systems - 741.1 Light/Optics

DOI:10.1117/12.2008988

Database:Compendex

Accession number:20132116362329

Title:Design and optimization of slow light photonic bandgap fiber

Authors:Yun, Maojin (1); Liang, Jian (1); Ren, Liyong (2); Kong, Weijin (1); Wan, Yong (1)

Author affiliation:(1) Key Laboratory of Photonic Material and Technology of Shandong Province, College of Physical Sciences, Qingdao University, Qingdao, Shandong 266071, China; (2) National Key Laboratory of Transient Optics and Photonic Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi 710119, China

Corresponding author:Yun, M.(mjyun@qdu.edu.cn)

Source title:Guangxue Xuebao/Acta Optica Sinica

Abbreviated source title:Guangxue Xuebao

Volume:33

Issue:4

Issue date:April 2013

Publication year:2013

Article number:0406005

Language:Chinese

ISSN:02532239

CODEN:GUXUDC

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:A novel type of photonic bandgap fiber (PBG-PCF) applied to pulse and slow light is proposed. The designed PBG-PCF is composed of a hollow core and seven cladding layers with air hole arranged by triangular lattice. Its band structure, group index and group velocity dispersion are analyzed in detail by using plane wave expansion method. The simulation results show that slow light property can be improved effectively by microfluid infiltration for the air holes of the inner cladding of PBG-PCF, and an ultra-wide-band photonic crystal slow light optical fiber with a group index of 6, a wide band more than 100 nm, which can transmit flat slow light, is realized. The designed PBG-PCF has promising and potential applications in communication networks, signal processing, optical sensors and nonlinear interactions.

Number of references:18

Main heading:Slow light

Controlled terms:Band structure - Fiber optics - Group velocity dispersion - Nonlinear optics - Optical fibers - Photonic bandgap fibers - Photonic crystal fibers - Photonic crystals - Signal processing - Wave propagation

Uncontrolled terms:Applications in communications - Cladding layer - Design and optimization - Hollow cores - Inner cladding - Nonlinear interactions - Plane wave expansion method - Triangular lattice

Classification code:711 Electromagnetic Waves - 716.1 Information Theory and Signal Processing - 741 Light, Optics and Optical Devices - 751 Acoustics, Noise. Sound - 933 Solid State Physics - 933.1 Crystalline Solids

DOI:10.3788/AOS201333.0406005

Database:Compendex

Accession number:20130615999525

Title:Effects of laser propagation through atmospheric turbulence on imaging quality in Fourier telescopy

Authors:Li, Yang (1); Xiang, Libin (3); Zhang, Wenxi (2)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) Graduate University of Chinese Academy of Sciences, Beijing 100049, China; (3) Academy of Opto-Electronics, Chinese Academy of Sciences, Beijing 100094, China

Corresponding author:Li, Y.(liyang914@126.com)

Source title:Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams

Abbreviated source title:Qiangjiguang Yu Lizishu

Volume:25

Issue:2

Issue date:February 2013

Publication year:2013

Pages:292-296

Language:Chinese

ISSN:10014322

CODEN:QYLIEL

Document type:Journal article (JA)

Publisher:Editorial Office of High Power Laser and Particle Beams, P.O. Box 919-805, Mianyang, 621900, China

Abstract:In order to determine the imaging quality degradation caused by the laser propagation through atmospheric turbulence in the Fourier telescopy system, the effects of turbulence on beam propagation characteristics are analyzed. We pointed out that the degradation in the quality of imaging is mainly from the beam wander and beam spreading induced by atmospheric turbulence that arises the pointing error. The mechanism of the pointing error affecting imaging process is analyzed. The pointing errors caused by turbulence of the entire uplink are calculated and imaging results are simulated under different atmospheric conditions. It is concluded that in weak and moderate turbulence (the refractive index structure constant of atmospheric turbulence is less than 10-14 m-2/3), the random pointing error is small (the random pointing offset proportion is less than 0.06) while the reconstructed image has good recognizability. However, in strong turbulence, imaging quality suffers severe decline. Thus the Fourier telescopy should be selected to avoid the strong turbulence location and time.

Number of references:13

Main heading:Atmospheric turbulence

Controlled terms:Fourier transforms - Lasers - Optical telescopes - Refractive index

Uncontrolled terms:Atmospheric conditions - Beam propagation - Beam spreading - Beam-wander - Fourier telescopy - Imaging process - Imaging quality - Imaging simulation - Laser propagation - Pointing errors - Reconstructed image - Refractive-index structure constant - Strong turbulence

Classification code:443.1 Atmospheric Properties - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 744.1 Lasers, General - 921.3 Mathematical Transformations

DOI:10.3788/HPLPB20132502.0292

Database:Compendex

Accession number:20132216371262

Title:Optical properties of Yb3+-doped silicate glasses waveguides formed by low-dose oxygen ion implantation and effects of annealing

Authors:Liu, Chun-Xiao (1); Cheng, Shu (3); Guo, Hai-Tao (2); Li, Wei-Nan (2); Wei, Wei (2); Peng, Bo (2)

Author affiliation:(1) School of Electronic and Information Engineering, Hefei Normal University, Hefei 230601, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences (CAS), Xi'an 710119, China; (3) Changchun University of Science and Technology, Changchun 130022, China; (4) Key Laboratory for Organic Electronics and Information Displays (KLOEID), Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, Nanjing 210046, China

Corresponding author:Wei, W.(weiwei@opt.ac.cn)

Source title:Optik

Abbreviated source title:Optik

Volume:124

Issue:14

Issue date:July 2013

Publication year:2013

Pages:1783-1786

Language:English

ISSN:00304026

Document type:Journal article (JA)

Publisher:Urban und Fischer Verlag Jena, P.O. Box 100537, Jena, 07705, Germany

Abstract:The planar waveguide, to our knowledge, has been firstly fabricated in the Yb3+-doped silicate glass by 6.0 MeV O3+ ion implantation at a dose of 6 × 1014 ions/cm2. The guiding properties are characterized by the prism-coupling and end-face coupling methods with a He-Ne beam. The dark-mode spectra and near-field intensity distribution are measured before and after annealing at 250 °C for 1 h in air. The results indicate that the thermal treatment can enhance the propagation properties with preserving the effective refractive indices well. The refractive index profile of the planar waveguide is reconstructed by the reflectivity calculation method, which shows a typical "enhanced well + optical barrier" distribution. The SRIM'2006 code is carried out to simulate the energy loss during the implantation in order to obtain a better understanding of the waveguide formation. © 2012 Elsevier GmbH.

Number of references:20

Main heading:Ion implantation

Controlled terms:Annealing - Energy dissipation - Glass - Planar waveguides - Refractive index - Silicates - Waveguides - Ytterbium

Uncontrolled terms:Effective refractive index - Guiding properties - Laser materials - Near-field intensity - Oxygen ion implantation - Propagation properties - Refractive index profiles - Waveguide formation

Classification code:932.1 High Energy Physics - 812.3 Glass - 812 Ceramics, Refractories and Glass - 741.1 Light/Optics - 714.3 Waveguides - 547.2 Rare Earth Metals - 537.1 Heat Treatment Processes - 525.4 Energy Losses (industrial and residential) - 414 Masonry Materials

DOI:10.1016/j.ijleo.2012.05.019

Database:Compendex

Accession number:20133016543312

Title:The design of optomechanical for bear severe mechanics environment

Authors:Yang, Hongtao (1); Fan, Zheyuan (1); Chen, Weining (1); Zhang, Zhaohui (1); Zhang, Jian (1); Zhang, Zhi (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an 710119, China

Source title:Key Engineering Materials

Abbreviated source title:Key Eng Mat

Volume:552

Monograph title:Advances in Optics Manufacture

Issue date:2013

Publication year:2013

Pages:52-56

Language:English

ISSN:10139826

CODEN:KEMAEY

ISBN-13:9783037856918

Document type:Conference article (CA)

Conference name:Asia Pacific Conference on Optics Manufacture 2012, APCOM 2012

Conference date:August 26, 2012 - August 28, 2012

Conference location:Changchun, China

Conference code:97919

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:Optical lenses act as the important methods for acquire the image information is applied increasingly board ,In accordance with the application environment that require content the precision and the force environment adaptation yet more power, so it is necessary that research on the adaption ability to the big level vibration and shock. In order to stand the bitter force environment put to use the centering assembly technology to ensure the image quality of the optical system. Design the different damping coefficient rubber-bearing isolation that assimilate the big level shock energy. At first, by the Pro/e software establish the three-dimensional model and use the ANSYS software simulate and analysis the result of the design. We want to apple the Sigfit software to simulate the effect that the vibration and shock affect on the MTF of the optical system. After optimize the design theory so as to attain the optimized result. By the experiment test the lenses about the accommodate ability, the result which can meet the shock of5000g.and 20g random vibration, camera can work effectively. This kind of design technology is mature and reliable and live through the examination under all kinds of environment, this design method is provided the reference for the design and development of optical mechanism production. © (2013) Trans Tech Publications, Switzerland.

Number of references:5

Main heading:Design

Controlled terms:Manufacture - Optical systems - Optimization

Uncontrolled terms:Application environment - Assembly technology - Damping coefficients - Design and Development - Environment adaptation - Opto-mechanical design - Simulate analysis - Three-dimensional model

Classification code:408 Structural Design - 537.1 Heat Treatment Processes - 741.3 Optical Devices and Systems - 921.5 Optimization Techniques

DOI:10.4028/www.scientific.net/KEM.552.52

Database:Compendex

Accession number:20130515972065

Title:Development of a diffuse air-argon plasma source using a dielectric-barrier discharge at atmospheric pressure

Authors:Tang, Jie (1); Jiang, Weiman (1); Zhao, Wei (1); Wang, Yishan (1); Li, Shibo (1); Wang, Haojing (1); Duan, Yixiang (1)

Corresponding author:Tang, J.(tangjie1979@opt.ac.cn)

Source title:Applied Physics Letters

Abbreviated source title:Appl Phys Lett

Volume:102

Issue:3

Issue date:January 21, 2013

Publication year:2013

Article number:033503

Language:English

ISSN:00036951

CODEN:APPLAB

Document type:Journal article (JA)

Publisher:American Institute of Physics, 2 Huntington Quadrangle, Suite N101, Melville, NY 11747-4502, United States

Abstract:A stable diffuse large-volume air plasma source was developed by using argon-induced dielectric-barrier discharges at atmospheric pressure. This plasma source can be operated in a filamentary discharge with the average areal power density of 0. 27 W / cm2 and the gas temperature of 315 ± 3 K. Spatial measurement of emission spectrum and temperature indicates that this plasma is uniform in the central region along the transverse direction. It is also found that the formation of diffuse air plasma mainly lies in the creation of sufficient seed electrons by the Penning effect through collisions between two argon or nitrogen metastables at low electric fields. © 2013 American Institute of Physics.

Number of references:37

Main heading:Plasma sources

Controlled terms:Argon - Atmospheric pressure - Dielectric materials - Electric discharges - Electric fields - Emission spectroscopy - Nitrogen plasma

Uncontrolled terms:Air plasmas - Dielectric-barrier discharges - Emission spectrums - Filamentary discharges - Gas temperature - Metastables - Penning effect - Power densities - Seed electrons - Spatial measurements - Transverse directions

Classification code:443.1 Atmospheric Properties - 701.1 Electricity: Basic Concepts and Phenomena - 708.1 Dielectric Materials - 801 Chemistry - 804 Chemical Products Generally - 932.3 Plasma Physics

DOI:10.1063/1.4788721

Database:Compendex

Accession number:20131516204324

Title:Image degradation of large-aperture R-C optical system induced by micro-vibration

Authors:Wang, Hongjuan (1); Wang, Wei (1); Liu, Qimin (1); Li, Gang (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, China; (2) Graduate School of the Chinese Academy of Sciences, Beijing, 100049, China

Corresponding author:Wang, H.(hongjuanwang@163.com)

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8759

Monograph title:Eighth International Symposium on Precision Engineering Measurements and Instrumentation

Issue date:2013

Publication year:2013

Article number:87592B

Language:English

ISSN:0277786X

CODEN:PSISDG

ISBN-13:9780819495501

Document type:Conference article (CA)

Conference name:8th International Symposium on Precision Engineering Measurements and Instrumentation

Conference date:August 8, 2012 - August 11, 2012

Conference location:Chengdu, China

Conference code:96463

Sponsor:International Committee on Measurements and Instrumentation; National Natural Science Foundation of China; Chinese Society for Measurement; China Instrument and Control Society

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:As part of the spacecraft optical loads, space camera will be subject to all working components in aircraft and space environment disturbance on-orbit, which have great influence on image resolution and image contrast, especially for large-aperture Ritchey-Chretien (R-C) optical system. This article puts forward a new method about estimating image quality degradation induced by micro-vibration. With the space coordinate transformation, the amount of optical elements jitter expressed by six variables are acquired, then the data can be imported to optical design software Code V, image motion and the root mean square(RMS) diameter will be quickly attained, then the image quality could be judged. The simulation and analysis are of significance for studying the influence of satellite micro-vibration on imaging system. For high resolution large-aperture R-C imaging system, this study provides important reference for system control and isolation. © 2013 SPIE.

Number of references:9

Main heading:Optical systems

Controlled terms:Image quality - Image resolution - Imaging systems - Measurements - Metadata - Optical design - Optics - Precision engineering

Uncontrolled terms:Image degradation - Image motion - Microvibrations - Optical-design software - Quality degradation - Simulation and analysis - Space coordinates - Space environment

Classification code:723 Computer Software, Data Handling and Applications - 741 Light, Optics and Optical Devices - 941 Acoustical and Optical Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments

DOI:10.1117/12.2014808

Database:Compendex

Accession number:20125015777294

Title:Opto-digital image encryption by using Baker mapping and 1-D fractional Fourier transform

Authors:Liu, Zhengjun (1); Li, She (3); Liu, Wei (3); Liu, Shutian (3)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an 710119, China; (2) Department of Automatic Measurement and Control, Harbin Institute of Technology, Harbin 150001, China; (3) Department of Physics, Harbin Institute of Technology, Harbin 150001, China

Corresponding author:Liu, Z.(zjliu@hit.edu.cn)

Source title:Optics and Lasers in Engineering

Abbreviated source title:Opt Lasers Eng

Volume:51

Issue:3

Issue date:March 2013

Publication year:2013

Pages:224-229

Language:English

ISSN:01438166

CODEN:OLENDN

Document type:Journal article (JA)

Publisher:Elsevier Ltd, Langford Lane, Kidlington, Oxford, OX5 1GB, United Kingdom

Abstract:We present an optical encryption method based on the Baker mapping in one-dimensional fractional Fourier transform (1D FrFT) domains. A thin cylinder lens is controlled by computer for implementing 1D FrFT at horizontal direction or vertical direction. The Baker mapping is introduced to scramble the amplitude distribution of complex function. The amplitude and phase of the output of encryption system are regarded as encrypted image and key. Numerical simulation has been performed for testing the validity of this encryption scheme. © 2012 Elsevier Ltd.

Number of references:38

Main heading:Cryptography

Controlled terms:Image processing - Mapping

Uncontrolled terms:Amplitude distributions - Chaotic mapping - Complex functions - Cylinder lens - Encryption schemes - Encryption system - Fractional Fourier transforms - Image encryptions - Optical encryption methods - Scrambling operation - Vertical direction

Classification code:716 Telecommunication; Radar, Radio and Television - 717 Optical Communication - 718 Telephone Systems and Related Technologies; Line Communications - 723 Computer Software, Data Handling and Applications - 741 Light, Optics and Optical Devices - 902.1 Engineering Graphics

DOI:10.1016/j.optlaseng.2012.10.008

Database:Compendex

Accession number:20131116114652

Title:Study on THz spectra and vibrational modes of benzoic acid and sodium benzoate

Authors:Zheng, Zhuan-Ping (1); Fan, Wen-Hui (1); Yan, Hui (1); Liu, Jia (1); Xu, Li-Min (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Fan, W.-H.(fanwh@opt.ac.cn)

Source title:Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis

Abbreviated source title:Guang Pu Xue Yu Guang Pu Fen Xi

Volume:33

Issue:3

Issue date:March 2013

Publication year:2013

Pages:582-585

Language:Chinese

ISSN:10000593

CODEN:GYGFED

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:Terahertz time-domain spectroscopy was employed to measure the terahertz absorption spectra of benzoic acid and sodium benzoate at room temperature. The origins of the measured features of benzoic acid were summarized based on previous study. Density functional theory was used to compute and analyze the molecular structure and vibrational modes of sodium benzoate in monomer. Based on the obtained results, the authors found that the THz spectral features can be used to distinguish benzoic acid and sodium benzoate totally; the essential reason for the THz spectral difference between benzoic acid and sodium benzoate is that the electrovalent bond of sodium benzoate affects the values of covalent bond lengths and bond angles, as well as the molecular interactions and arrangement in unit cell; the measured features of benzoic acid and sodium benzoate come from the collective vibrations except the peaks located at 107 cm-1 of benzoic acid and 54 cm-1 of sodium benzoate.

Number of references:14

Main heading:Benzoic acid

Controlled terms:Density functional theory - Molecular structure - Plasmons - Spectrophotometers - Terahertz spectroscopy

Uncontrolled terms:Bond angle - Density functional theories (DFT) - Room temperature - Sodium benzoate - Spectral differences - Spectral feature - Terahertz absorption spectrum - Terahertz time domain spectroscopy - THz spectrum - Unit cells - Vibrational modes

Classification code:801 Chemistry - 801.4 Physical Chemistry - 804.1 Organic Compounds - 931 Classical Physics; Quantum Theory; Relativity

DOI:10.3964/j.issn.1000-0593(2013)03-0582-04

Database:Compendex

Accession number:20135017087283

Title:Algorithm of semicircular laser spot detection based on circle fitting

Authors:Wang, Zhengzhou (1); Xu, Ruihua (1); Hu, Bingliang (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics Chinese Academy of Science, Xi'an Shanxi 710019, China; (2) University of Chinese Academy of Sciences, Beijing 100039, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8878

Monograph title:Fifth International Conference on Digital Image Processing, ICDIP 2013

Issue date:2013

Publication year:2013

Article number:88782Z

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819493057

Document type:Conference article (CA)

Conference name:5th International Conference on Digital Image Processing, ICDIP 2013

Conference date:April 21, 2013 - April 22, 2013

Conference location:Beijing, China

Conference code:101262

Sponsor:Chinese Academy of Sciences

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:In order to obtain the exact center of an asymmetrical and semicircular aperture laser spot, a method for laser spot detection method based on circle fitting was proposed in this paper, threshold of laser spot image was segmented by the method of gray morphology algorithm, rough edge of laser spot was detected in both vertical and horizontal direction, short arcs and isolated edge points were deleted by contour growing, the best circle contour was obtained by iterative fitting and the final standard round was fitted in the end. The experimental results show that the precision of the method is obviously better than the gravity model method being used in the traditional large laser automatic alignment system. The accuracy of the method to achieve asymmetrical and semicircular laser spot center meets the requirements of the system. © 2013 SPIE.

Number of references:6

Main heading:Edge detection

Controlled terms:Algorithms - Image processing

Uncontrolled terms:Aperture lasers - Automatic alignment - Circle contour - Circle fitting - Gravity model - Gray morphology - Iterative fitting - Laser spots

Classification code:716 Telecommunication; Radar, Radio and Television - 723 Computer Software, Data Handling and Applications - 741 Light, Optics and Optical Devices - 921 Mathematics

DOI:10.1117/12.2030791

Database:Compendex

Accession number:20124615668506

Title:Local tomography based on grey model

Authors:Ye, Renzhen (1); Lu, Xiaoqiang (2); Liu, Haihua (3)

Author affiliation:(1) College of Sciences, Huazhong Agricultural University, Wuhan 430074, Hubei, China; (2) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China; (3) Department of Electronics and Information Engineering, South-Central University for Nationalities, China

Corresponding author:Lu, X.(luxq666666@opt.ac.cn)

Source title:Neurocomputing

Abbreviated source title:Neurocomputing

Volume:101

Issue date:February 4, 2013

Publication year:2013

Pages:10-17

Language:English

ISSN:09252312

E-ISSN:18728286

CODEN:NRCGEO

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:This paper studied region-of-interest (ROI) problem of computed tomography. It is necessary to use almost local projection data to reduce radiation exposure or time in medical imaging when only a small part of the patient's body needs to be viewed. Improving the quality of reconstructed ROI and reducing radiation exposure are our aims. However, the traditional local tomography algorithm has difficulty in reconstructing the ROI due to significant truncation artifacts. In this paper, a new grey model based method is reported for ROI image reconstruction from truncated projection data. By using grey model, the proposed method can extrapolate the truncated projection data, and reconstruct the ROI from a set of its projections. As a result, about 75% of full projection data are saved, as compared with other traditional approachs, in reconstructing a local region of 32 pixels in radius in an image of 256×256 pixels. Experimental results show that the proposed method exhibits more saving in exposure as compared with other local tomography algorithms and results in better quality of the reconstructed image. © 2012 Elsevier B.V.

Number of references:38

Main heading:Tomography

Controlled terms:Algorithms - Computerized tomography - Image reconstruction - Medical imaging - Pixels

Uncontrolled terms:Computed Tomography - Grey Model - Local projections - Local region - Local tomography - Projection data - Radiation Exposure - Reconstructed image - Region of interest - Traditional approachs - Truncated projections - Wavelet

Classification code:921 Mathematics - 801 Chemistry - 746 Imaging Techniques - 741 Light, Optics and Optical Devices - 723.5 Computer Applications - 723 Computer Software, Data Handling and Applications - 531 Metallurgy and Metallography

DOI:10.1016/j.neucom.2012.06.006

Database:Compendex

Accession number:20133616694039

Title:Positive-negative nonlocal lensless imaging based on statistical optics

Authors:Yao, Yin-Ping (1); Wan, Ren-Gang (1); Xue, Yu-Lang (1); Zhang, Shi-Wei (1); Zhang, Tong-Yi (1)

Corresponding author:Zhang, T.-Y.(tyzhang@opt.ac.cn)

Source title:Wuli Xuebao/Acta Physica Sinica

Abbreviated source title:Wuli Xuebao

Volume:62

Issue:15

Issue date:August 5, 2013

Publication year:2013

Article number:154201

Language:Chinese

ISSN:10003290

CODEN:WLHPAR

Document type:Journal article (JA)

Publisher:Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing, 100190, China

Abstract:Based on correlated imaging with pseudo-thermal light, Wu and Meyers independently experimentally showed that both positive and negative images can be obtained by using a novel algorithm. With the theory of statistical optics, we construct the model of thermal light, and demonstrate the novel algorithm for image reconstruction. To deal with the data attained in the correlated imaging, we reorder the intensity recorded by the bucket detector according to the value of fluctuation. For a given fluctuation range with all the records above or below a specific value, we can obtain either positive or negative images by calculate the correlation between the selected records of the bucket detector and the reference detector. Nevertheless, without correlated calculations, positive or negative images can be also produced by directly averaging the corresponding records of the reference detector with positive or negative fluctuations. Meanwhile, the visibility of imaging is greatly enhanced. This correspondence imaging method further demonstrates the importance of intensity fluctuations in the nonlocal imaging with thermal light. We also experimentally show the images that obtained by the correlation method and the positive-negative correspondence imaging method, respectively. Our results indicate that this novel algorithm has a better visibility than that of the conventional correlated imaging. © Chinese Physical Society.

Number of references:34

Main heading:Detectors

Controlled terms:Algorithms - Image reconstruction - Statistical optics - Visibility

Uncontrolled terms:Correlated imaging - Correlation imaging - Intensity fluctuations - Lens-less imaging - Nonlocal - Nonlocal imaging - Novel algorithm - Thermal light

Classification code:723 Computer Software, Data Handling and Applications - 741 Light, Optics and Optical Devices - 914 Safety Engineering - 921 Mathematics

DOI:10.7498/aps.62.154201

Database:Compendex

Accession number:20131616213956

Title:Athermalization design of catadioptric middle infrared dual field zoom system

Authors:Jiang, Kai (1); Zhou, Sizhong (1); Li, Gang (1); Yang, Xiaoxu (1); Zhao, Rui (3); Zhang, Hengjin (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an 710119, China; (2) University of the Chinese Academy of Sciences, Beijing 100049, China; (3) Beijing Institute of Tracking and Communication Technology, Beijing 100094, China

Corresponding author:Jiang, K.(jiangkai2008.jj@163.com)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:42

Issue:2

Issue date:February 2013

Publication year:2013

Pages:403-407

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:Hybrid refractive-diffractive design offers a new approach for athermalization design in wide temperature range. In this paper, working wavelength is in 3-5 μm. For cool 320 × 240 infrared detector, pixel size 30 μm × 30 μm, this system can realize 400 mm and 800 mm dual filed-of-view and the F-number of 2/4 respectively. Two systems both can obtain the cold shield efficiency of 100% though controlling machine structure. A diffractive surface was introduced in the shared part of two different focal length position. It achieve the athermal design using only one diffractive surface. The evolution of the system was given in the temperature range-40-60°C. The results show that at the spatial frequency of 18 lp/mm the MTF approach to the diffractive limitation.

Number of references:9

Main heading:Optical design

Controlled terms:Optical systems

Uncontrolled terms:Athermal designs - Athermalization - Diffractive surfaces - Hybrid refractive-diffractive - Machine structures - Spatial frequency - Wide temperature ranges - Zoom optical system

Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems

Database:Compendex

Accession number:20134717001726

Title:Comparison of timing noise properties of carbon nanotubes, graphene and graphene oxide as saturable absorbers for a mode-locked Er-doped fiber laser

Authors:Li, Xiaohui (1); Wu, Kan (2); Shum, Perry Ping (2); Wang, Yonggang (3); Wang, Yishan (3); Wang, Qijie (1)

Author affiliation:(1) School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Ave. 639798, Singapore; (2) Centre for Disruptive Photonic Technologies, Nanyang Technological University, 21 Nanyang Link, 63737, Singapore; (3) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Wang, Q.(qjwang@ntu.edu.sg)

Source title:CLEO: Applications and Technology, CLEO_AT 2013

Abbreviated source title:Appl. Technol.

Monograph title:Conference on Lasers and Electro Optics, CLEO: Applications and Technology, CLEO_AT 2013

Issue date:2013

Publication year:2013

Pages:JTu4A.06

Language:English

ISBN-13:9781557529725

Document type:Conference article (CA)

Conference name:CLEO: Applications and Technology, CLEO_AT 2013

Conference date:June 9, 2013 - June 14, 2013

Conference location:San Jose, CA, United states

Conference code:100547

Publisher:Optical Society of American (OSA), 2010 Massachusetts Ave, NW, Washington, DC, DC 20036, United States

Number of references:4

Main heading:Graphene

Controlled terms:Carbon nanotubes - Erbium - Fiber lasers - Laser applications - Locks (fasteners) - Mode-locked fiber lasers - Passive mode locking - Saturable absorbers

Uncontrolled terms:Carbon material - Er-doped fiber laser - Graphene oxides - Mode-locked - Passively mode-locked - Test platforms - Timing noise

Classification code:547.2 Rare Earth Metals - 601.3 Mechanisms - 744 Lasers - 761 Nanotechnology - 804 Chemical Products Generally

Database:Compendex

Accession number:20135117117182

Title:Passively harmonic mode locking in ytterbium-doped fiber laser with graphene oxide saturable absorber

Authors:Li, Huiquan (1); Wang, Yonggang (2); Yan, Peiguang (1); Cao, Guangzhong (3); Zhao, Junqing (1); Zhang, Gelin (1); Huang, Shisheng (1); Lin, Rongyong (1)

Author affiliation:(1) Shenzhen University, College of Electronic Science and Technology, Shenzhen Key Laboratory of Laser Engineering, Shenzhen, Guangdong 518060, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, State Key Laboratory of Transient Optics and Photonics, Xi'an 710119, China; (3) Shenzhen University, Shenzhen Key Laboratory of Electromagnetic Control, Shenzhen, 518060 Guangdong, China

Corresponding author:Yan, P.(yanpg@szu.edu.cn)

Source title:Optical Engineering

Abbreviated source title:Opt Eng

Volume:52

Issue:12

Issue date:December 2013

Publication year:2013

Article number:126102

Language:English

ISSN:00913286

E-ISSN:15602303

CODEN:OPEGAR

Document type:Journal article (JA)

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:We have demonstrated the dissipative solitons generated in an ytterbium-doped fiber laser cavity using graphene oxide as the saturable absorber. The lasing light, centered at 1077.2 nm, has a 3 dB spectral bandwidth of &sim;1.12 nm. Under different launched pump powers and appropriate polarization orientations, harmonic mode-locked of second- and third-order pulse trains have been achieved; the corresponding 3-dB bandwidth and pulse duration have been detected. © The Authors. Published by SPIE.

Number of references:31

Main heading:Harmonic analysis

Controlled terms:Bandwidth - Fiber lasers - Graphene - Locks (fasteners) - Optical pumping - Saturable absorbers - Solitons - Ytterbium

Uncontrolled terms:All-fiber lasers - Dissipative solitons - Graphene oxides - Harmonic mode locking - Polarization orientation - Spectral bandwidth - Ytterbium doped fibers - Ytterbium-doped fiber lasers

Classification code:921.6 Numerical Methods - 921.1 Algebra - 804 Chemical Products Generally - 761 Nanotechnology - 744.4 Solid State Lasers - 744.1 Lasers, General - 741.1.2 Fiber Optics - 741.1 Light/Optics - 716.1 Information Theory and Signal Processing - 601.3 Mechanisms - 547.2 Rare Earth Metals

DOI:10.1117/1.OE.52.12.126102

Database:Compendex

Accession number:20134116835127

Title:Temperature dependent study of carrier diffusion in photon enhanced thermionic emission solar converters

Authors:Yang, Yang (1); Yang, Wen Zheng (1); Tang, Wei Dong (1); Sun, Chuan Dong (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China

Corresponding author:Sun, C. D.(scd@opt.ac.cn)

Source title:Advanced Materials Research

Abbreviated source title:Adv. Mater. Res.

Volume:772

Monograph title:Material Researches and Energy Engineering

Issue date:2013

Publication year:2013

Pages:634-639

Language:English

ISSN:10226680

ISBN-13:9783037857892

Document type:Conference article (CA)

Conference name:2013 International Conference on Future Energy and Materials Research, FEMR 2013

Conference date:June 1, 2013 - June 2, 2013

Conference location:Singapore

Conference code:99918

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:Photon Enhanced Thermionic Emission (PETE) is a novel concept in solar energy conversion, which can efficiently harvest solar energy at elevated temperatures. However, the temperature dependence of material parameters has not been clearly stated so far. In this study, a model for carrier transport is presented based on one dimension diffusion equation. Material data of GaAs are used to testify the temperature impact on material parameters. We find that for higher doped p-type GaAs which is suitable for PETE cathode material, its electron diffusion length shows weak temperature dependence. Carrier transport efficiency can be boosted by optimizing the geometry of the cathode and the optical parameters of the material. Finally, we propose a design of reflective mode cathode with reflective back surface and nanostructure emissive surface for PETE application. © (2013) Trans Tech Publications, Switzerland.

Number of references:13

Main heading:Cathodes

Controlled terms:Energy conversion - Gallium arsenide - Photons - Semiconducting gallium - Solar energy - Temperature distribution - Thermionic emission

Uncontrolled terms:Energy converters - GaAs - PETE - Temperature dependence - Transport efficiency

Classification code:741.1 Light/Optics - 712.2 Thermionic Materials - 712.1.1 Single Element Semiconducting Materials - 804 Chemical Products Generally - 704.1 Electric Components - 615.2 Solar Power - 525.5 Energy Conversion Issues - 641.1 Thermodynamics

DOI:10.4028/www.scientific.net/AMR.772.634

Database:Compendex

Accession number:20134717009960

Title:Comparison of timing noise properties of carbon nanotubes, graphene and graphene oxide as saturable absorbers for a mode-locked er-doped fiber laser

Authors:Li, Xiaohui (1); Wu, Kan (2); Shum, Perry Ping (2); Wang, Yonggang (3); Wang, Yishan (3); Wang, Qijie (1)

Corresponding author:Wang, Q.(qjwang@ntu.edu.sg)

Source title:CLEO: QELS_Fundamental Science, CLEO:QELS FS 2013

Abbreviated source title:Fundam. Sci.

Monograph title:CLEO: QELS_Fundamental Science, CLEO:QELS FS 2013

Issue date:2013

Publication year:2013

Pages:JTu4A.06

Language:English

ISBN-13:9781557529725

Document type:Conference article (CA)

Conference name:CLEO: QELS_Fundamental Science, CLEO:QELS FS 2013

Conference date:June 9, 2013 - June 14, 2013

Conference location:San Jose, CA, United states

Conference code:100561

Publisher:Optical Society of American (OSA), 2010 Massachusetts Ave, NW, Washington, DC, DC 20036, United States

Number of references:4

Main heading:Graphene

Controlled terms:Carbon nanotubes - Fiber lasers - Locks (fasteners) - Mode-locked fiber lasers - Passive mode locking - Saturable absorbers

Uncontrolled terms:Carbon material - Er-doped fiber laser - Graphene oxides - Mode-locked - Passively mode-locked - Test platforms - Timing noise

Classification code:601.3 Mechanisms - 744.1 Lasers, General - 744.4 Solid State Lasers - 761 Nanotechnology - 804 Chemical Products Generally

Database:Compendex

Accession number:20132516430750

Title:Spin Hall effect of the reflected and transmitted vector light beam between the interfaces

Authors:Duan, Tao (1); Xie, Xiao-Ping (1); Duan, Jie (2); Qian, Feng-Chen (1); Yan, Shao-Hui (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academia of Sciences, Xi'an 710119, China; (2) Xi'an Telecommunication College, Xi'an 710106, China

Corresponding author:Xie, X.-P.(xxp@opt.ac.cn)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:42

Issue:5

Issue date:May 2013

Publication year:2013

Pages:511-514

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:The finite electromagnetic vector is achieved by factorizing into a mapping matrix and a Jones vector. The vectorial property can be described by a degree of freedom of the mapping matrix that can be determined by the azimuthal angle of a fixed unit vector with respect to the wave vector. The representation formalism of the reflected and transmitted vector light beams is theoretically developed between the interfaces. The transverse shift, which is correlative with the spin Hall effect, is discussed. The transverse shift of the linearly polarized light beam (σ=0) is zero. The transverse shift of the circularly polarized light beam (σ=±1) is maximum and the left and right circularly polarized light beam is the same.The dependence of transverse shift of the left circularly polarized light beam on the incidence angle is algo analyzed.

Number of references:29

Main heading:Vectors

Controlled terms:Circular polarization - Crystal symmetry - Light polarization - Spin Hall effect

Uncontrolled terms:Circularly polarized light - Degree of freedom - Incidence angles - Linearly polarized light - Representation formalisms - Right circularly polarized - Transverse shift - Vector beams

Classification code:701.2 Magnetism: Basic Concepts and Phenomena - 741.1 Light/Optics - 921.1 Algebra - 933.1.1 Crystal Lattice

DOI:10.3788/gzxb20134205.0511

Database:Compendex

Accession number:20132916502356

Title:1.5 kW incoherent beam combining of four fiber lasers using adaptive fiber-optics collimators

Authors:Geng, Chao (1); Zhao, Baoyin (2); Zhang, Entao (2); Luo, Wen (1); Tan, Yi (1); Zhu, Yonggang (2); Yang, Hening (2); Mu, Jinbo (1); Li, Xinyang (1); Duan, Kailiang (2); Zhao, Wei (2)

Author affiliation:(1) Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China; (2) Xiàn Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xiàn 710119, China

Source title:IEEE Photonics Technology Letters

Abbreviated source title:IEEE Photonics Technol Lett

Volume:25

Issue:13

Issue date:2013

Publication year:2013

Pages:1286-1289

Article number:6516078

Language:English

ISSN:10411135

CODEN:IPTLEL

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., 445 Hoes Lane / P.O. Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:We demonstrate the incoherent beam combining (BC) of four high-power single-mode fiber lasers. Adaptive fiber-optics collimators (AFOC) of 0.5 kW-level are developed to correct the tip/tilt-type phase errors among beamlets. The maximum deflection angle of the AFOC is about 0.29 mrad. A stochastic parallel gradient descent algorithm is employed as the tip/tilt control strategy. The tip/tilt control makes four separate laser beams overlap with each other in the far-field, and the average of normalized power-in-bucket increases from 0.171 in open loop to 0.798 in closed loop when 1.5-kW total output power is achieved. The precise tracking ability and control accuracy of this BC system are investigated. Experimental results expose that thermal-blooming effect disturbs BC seriously when the total output power is up to kW-level, which could be mitigated by inducing air flow near the laser output. © 1989-2012 IEEE.

Number of references:13

Main heading:Thermal blooming

Controlled terms:Fiber lasers - Fiber optics - Gradient methods - Single mode fibers

Uncontrolled terms:Beam combining - Control strategies - High power fiber lasers - Incoherent beams - Maximum deflection - Precise tracking - Single-mode fiber lasers - Stochastic parallel gradient descent algorithm

Classification code:741.1.1 Nonlinear Optics - 741.1.2 Fiber Optics - 921.6 Numerical Methods

DOI:10.1109/LPT.2013.2263123

Database:Compendex

Accession number:20133616707790

Title:Cloud3DView: An interactive tool for cloud data center operations

Authors:Yin, Jianxiong (1); Sun, Peng (1); Wen, Yonggang (1); Gong, Haigang (2); Liu, Ming (2); Li, Xuelong (3); You, Haipeng (1); Gao, Jinqi (1); Lin, Cynthia (1)

Source title:SIGCOMM 2013 - Proceedings of the ACM SIGCOMM 2013 Conference on Applications, Technologies, Architectures, and Protocols for Computer Communication

Abbreviated source title:SIGCOMM - Proc. ACM SIGCOMM Conf. Appl., Technol., Archit., Protoc. Comput. Commun.

Monograph title:SIGCOMM 2013 - Proceedings of the ACM SIGCOMM 2013 Conference on Applications, Technologies, Architectures, and Protocols for Computer Communication

Issue date:2013

Publication year:2013

Pages:499-500

Language:English

ISBN-13:9781450320566

Document type:Conference article (CA)

Conference name:ACM SIGCOMM 2013 Conference on Applications, Technologies, Architectures, and Protocols for Computer Communication, SIGCOMM 2013

Conference date:August 12, 2013 - August 16, 2013

Conference location:Hong Kong, China

Conference code:99070

Sponsor:ACM SIGCOMM

Publisher:Association for Computing Machinery, General Post Office, P.O. Box 30777, NY 10087-0777, United States

Number of references:2

Main heading:Information management

Controlled terms:Communication - Computer architecture - Data visualization - Network architecture - Three dimensional - Three dimensional computer graphics - User interfaces

Uncontrolled terms:Cloud data centers - Data center operations - Design and build - First person shooter - Interactive tool - Rapid deployments - User experience - Visualization technique

Classification code:716 Telecommunication; Radar, Radio and Television - 722 Computer Systems and Equipment - 722.2 Computer Peripheral Equipment - 723 Computer Software, Data Handling and Applications - 903.2 Information Dissemination

DOI:10.1145/2486001.2491704

Database:Compendex

Accession number:20131716234692

Title:Optical color image hiding scheme based on chaotic mapping and Hartley transform

Authors:Liu, Zhengjun (1); Zhang, Yu (1); Liu, Wei (4); Meng, Fanyi (3); Wu, Qun (3); Liu, Shutian (4)

Author affiliation:(1) Department of Automatic Measurement and Control, Harbin Institute of Technology, Harbin 150001, China; (2) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an 710119, China; (3) Department of Electronic Science and Technology, Harbin Institute of Technology, Harbin 150001, China; (4) Department of Physics, Harbin Institute of Technology, Harbin 150001, China; (5) State Key Laboratory of Information Security, Institute of Information Engineering, Chinese Academy of Sciences, Beijing 100093, China

Corresponding author:Liu, Z.(zjliu@hit.edu.cn)

Source title:Optics and Lasers in Engineering

Abbreviated source title:Opt Lasers Eng

Volume:51

Issue:8

Issue date:August 2013

Publication year:2013

Pages:967-972

Language:English

ISSN:01438166

CODEN:OLENDN

Document type:Journal article (JA)

Publisher:Elsevier Ltd, Langford Lane, Kidlington, Oxford, OX5 1GB, United Kingdom

Abstract:We present a color image encryption algorithm by using chaotic mapping and Hartley transform. The three components of color image are scrambled by Baker mapping. The coordinates composed of the scrambled monochrome components are converted from Cartesian coordinates to spherical coordinates. The data of azimuth angle is normalized and regarded as the key. The data of radii and zenith angle are encoded under the help of optical Hartley transform with scrambled key. An electro-optical encryption structure is designed. The final encrypted image is constituted by two selected color components of output in real number domain. © 2013 Elsevier Ltd. All rights reserved.

Number of references:36

Main heading:Cryptography

Controlled terms:Image processing - Mapping

Uncontrolled terms:Cartesian coordinate - Chaotic mapping - Color component - Color image encryptions - Encrypted images - Hartley transform - Optical encryption - Spherical coordinates

Classification code:716 Telecommunication; Radar, Radio and Television - 717 Optical Communication - 718 Telephone Systems and Related Technologies; Line Communications - 723 Computer Software, Data Handling and Applications - 741 Light, Optics and Optical Devices - 902.1 Engineering Graphics

DOI:10.1016/j.optlaseng.2013.02.015

Database:Compendex

Accession number:20134216860618

Title:Spectrum reconstruction algorithms based on modern spectrum estimation

Authors:Fu, Zhan-Fang (1); Liu, Xue-Bin (1)

Author affiliation:(1) Laboratory of Spectral Imaging Technique, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Liu, X.-B.(lxb@opt.ac.cn)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:42

Issue:9

Issue date:September 2013

Publication year:2013

Pages:1091-1096

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:To overcome the shortcoming of the conventional spectrum recovery method, concepts and basic algorithms of a modern spectrum estimation are introduced. Two different methods (auto-Regressive parametric model and multiple signal classification algorithm) are used to reconstruct light spectrum from interferogram. Compared with conventional method for spectrum reconstruction, the modern spetrum estimation methods can well be adopted in spectrum reconstruction and perform excellently, especially when it is used to get higher spectrum resolution from a short series of data recorded.

Number of references:16

Main heading:Algorithms

Controlled terms:Spectrum analysis - Wavelet analysis

Uncontrolled terms:Auto regressive models - Conventional methods - Interferogram spectrum - Multiple signal classification algorithm - Parametric modeling - Spectrum estimation - Spectrum reconstruction - Spectrum resolution

Classification code:723 Computer Software, Data Handling and Applications - 921 Mathematics - 941 Acoustical and Optical Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments

DOI:10.3788/gzxb20134209.1091

Database:Compendex

Accession number:20134817040190

Title:Design of Topas porous fiber for low-loss Terahertz wave guiding

Authors:Wang, Doudou (1); Wang, Lili (2)

Author affiliation:(1) College of Science, Xi'an University of Science and Technology, Xi'an 710054, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Wang, D.(doudouwang@opt.ac.cn)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:42

Issue:9

Issue date:September 2013

Publication year:2013

Pages:2409-2413

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:A kind of porous fiber for low-loss Terahertz wave guiding was designed based on Topas cyclic olefin copolymer (Topas COC). Topas COC is a kind of novel Terahertz low-loss material. Terahertz wave was well confined in a series of subwavelength air holes, which were arranged in base material with triangular lattice. Propagation properties of the designed porous fiber were investigated by using the full-vector finite element method. The results indicated that the designed Topas porous fiber had low loss and low dispersion properties within Terahertz frequency. The loss was less than 0.2 cm-1 from 0.4 THz to 1.5 THz, and the dispersion was 1.8±0.3 ps/THz/cm within 0.48-1.5 THz. The designed fiber structure was relatively simple and feasible for fabrication. It can be fabricated by the thermo-drawing techniques of polymer preforms invented by our group. The results provided theoretical references for fabrication of Topas Terahertz low-loss and flexible fiber waveguides.

Number of references:16

Main heading:Fibers

Controlled terms:Dispersion (waves) - Dispersions - Fabrication - Finite element method - Terahertz waves

Uncontrolled terms:Cyclic Olefin Copolymers - Fiber structures - Low loss material - Porous fibers - Propagation properties - Terahertz frequencies - Topas COC - Triangular lattice

Classification code:951 Materials Science - 921.6 Numerical Methods - 913.4 Manufacturing - 817 Plastics and Other Polymers: Products and Applications - 812 Ceramics, Refractories and Glass - 711.1 Electromagnetic Waves in Different Media - 711 Electromagnetic Waves

Database:Compendex

Accession number:20141717633076

Title:A novel segmentation guided approach for single image dehazing

Authors:Zhu, Qingsong (1); Heng, Pheng Ann (3); Shao, Ling (4); Li, Xuelong (5)

Author affiliation:(1) Shenzhen Institutes of Advanced Technology, Chinese Advanced of Sciences, Shenzhen, China; (2) Chinese University of Hong Kong, Hong Kong; (3) Department of Computer Science and Engineering, Chinese University of Hong Kong, Ho Sin-Hang Engineering Building, Shatin, N.T., Hong Kong; (4) Department of Electronic and Electrical Engineering, University of Sheffield, Sheffield, S1 3JD, United Kingdom; (5) Centre for OPTical IMagery Analysis and Learning (OPTIMAL), Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, Shanxi, China

Corresponding author:Zhu, Q.(qs.zhu@siat.ac.cn)

Source title:2013 IEEE International Conference on Robotics and Biomimetics, ROBIO 2013

Abbreviated source title:IEEE Int. Conf. Rob. Biomimetics, ROBIO

Monograph title:2013 IEEE International Conference on Robotics and Biomimetics, ROBIO 2013

Issue date:2013

Publication year:2013

Pages:2414-2417

Article number:6739832

Language:English

Document type:Conference article (CA)

Conference name:2013 IEEE International Conference on Robotics and Biomimetics, ROBIO 2013

Conference date:December 12, 2013 - December 14, 2013

Conference location:Shenzhen, China

Conference code:104586

Publisher:IEEE Computer Society

Abstract:This paper presents a novel image haze removal approach from single image. In the algorithm, the constant albedo and dark channel prior methods are combined to represent the transmission model of hazed image. And then, the watershed segmentation approach is introduced to decompose the input image into some gray level consistent areas. Compared with traditional fixed image partition schemes, better estimation of the atmospheric light can be obtained as well as to avoid the problem of halo artifacts. With the improved haze image modeling approach and atmospheric light estimation, the dehazed image with better visual quality can be achieved. © 2013 IEEE.

Number of references:12

Main heading:Demulsification

Controlled terms:Biomimetics - Image segmentation - Robotics

Uncontrolled terms:Dark channel priors - Image modeling - Image partition - Light estimations - Single image dehazing - Transmission model - Visual qualities - Watershed segmentation

Classification code:461.9 Biology - 513.1 Petroleum Refining, General - 731.5 Robotics - 741.1 Light/Optics

DOI:10.1109/ROBIO.2013.6739832

Database:Compendex

Accession number:20131616213967

Title:Experiment on two dimensional quadrilateral position sensing detector

Authors:Zhang, Min (1); Liang, Yanbing (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Zhang, M.(zm_kobe2012@126.com)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:42

Issue:2

Issue date:February 2013

Publication year:2013

Pages:459-464

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:Position sensing detector (PSD) is an optics sensor that can detect the center of the incident light. It has the advantages of fast response, high position resolution and simple circuit, these characteristics make it a wide range of application in precision measurement such as angle and position detection. A optical experiment on a optic bench A823 was chose for data acquisition under the DOS operating system and Borland C ++ builder, C program was written for a real-time transformation between analog voltage and digital voltage, then position coordinate was calculated and the error was analyzed. 2L10_SU65_SPC02 PSD used in this experiment is from Sitek corporation in Sweden, through the error analysis the main conclusions include fringe effect of PSD, the main influence about the position error are natural daylight and fluorescent light. If eliminate influence factor precision will improve a lot.

Number of references:6

Main heading:Experiments

Controlled terms:Data acquisition - Detectors - Error analysis - Light

Uncontrolled terms:Fluorescent light - Optical experiments - Position coordinates - Position detection - Position errors - Position resolution - Position sensing detectors - Precision measurement

Classification code:723.2 Data Processing and Image Processing - 741.1 Light/Optics - 901.3 Engineering Research - 914 Safety Engineering - 921.6 Numerical Methods

Database:Compendex

Accession number:20140317216008

Title:Optical system of a four spectral bands sea-infrared radiometer

Authors:Wang, Feng (1); Zhang, Jian (1); Fan, Zheyuan (1); Yan, Aqi (1); Qu, Enshi (1); Cao, Jianzhong (1)

Author affiliation:(1) Xi'an Institute of Optical and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Wang, F.(wangfeng@opt.cn)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:42

Issue:SUPPL.2

Issue date:December 2013

Publication year:2013

Pages:368-373

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:An automatic four spectral bands infrared radiometer system was designed for measuring the sea surface temperature. The principle of temperature measurement was given and the optical system was designed, which was divided into long-wave and medium-wave infrared optical system by using a spectroscope. Three long-wave infrared spectral bands were obtained through three long-wave infrared filters in the long-wave infrared optical system, respectively, which were 8-13 μm, 10.3-11.3 μm and 11.5-12.5 μm. Similarly, a medium-wave infrared spectral band (3.5-4.0 μm) was acquired by a medium-wave infrared filter in the medium-wave infrared optical system. The film system transmittance curves of the four infrared spectral bands were given, showing that the desired effect about narrow-band light pass was achieved. Furthermore, the modulation reticles in the long-wave and medium-wave infrared optical system were designed to modulate the object infrared radiation. The accuracy of the system was better than 0.5 K.

Number of references:10

Main heading:Optical systems

Controlled terms:Atmospheric temperature - Infrared detectors - Infrared radiation - Modulation - Oceanography - Optical instruments - Radiometers - Temperature measurement - Waves

Uncontrolled terms:Infra-red radiometers - Infrared filters - Multi-spectral - Oceanic optics - Sea surface temperature (SST)

Classification code:944.7 Radiation Measuring Instruments - 944.6 Temperature Measurements - 741.3 Optical Devices and Systems - 741.1 Light/Optics - 718 Telephone Systems and Related Technologies; Line Communications - 717 Optical Communication - 716 Telecommunication; Radar, Radio and Television - 471.1 Oceanography, General - 443.1 Atmospheric Properties

Database:Compendex

Accession number:20131916320759

Title:Accurate measurement of the jitter time of GaAs photoconductive semiconductor switches triggered by a one-to-two optical fiber

Authors:Shi, Wei (1); Zhang, Lin (1); Gui, Huaimeng (1); Hou, Lei (1); Xu, Ming (1); Qu, Guanghui (1)

Author affiliation:(1) Applied Physics Department, Xi'An University of Technology, Xi'an 710048, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Xi'an 710119, China

Source title:Applied Physics Letters

Abbreviated source title:Appl Phys Lett

Volume:102

Issue:15

Issue date:April 15, 2013

Publication year:2013

Article number:154106

Language:English

ISSN:00036951

CODEN:APPLAB

Document type:Journal article (JA)

Publisher:American Institute of Physics, 2 Huntington Quadrangle, Suite N101, Melville, NY 11747-4502, United States

Abstract:An improved method is proposed to measure the jitter time of the photoconductive semiconductor switches (PCSSs). A one-to-two fiber is utilized to separate and guide the 1053 nm laser beam to trigger two identical 3-mm-gap GaAs PCSSs synchronously. The jitter time is derived from the time lags of two switches turn-on by the error transfer theory. At a bias voltage of 1 kV, the jitter time is measured as 14.41 ps, which is the lowest jitter of GaAs PCSS that has been reported so far. © 2013 AIP Publishing LLC.

Number of references:15

Main heading:Time switches

Controlled terms:Gallium arsenide - Jitter - Optical fibers - Photoconductive switches - Semiconducting gallium

Uncontrolled terms:1053 nm - Accurate measurement - GaAs - Jitter-time - Photoconductive semiconductor switches - Time lag

Classification code:741.1.2 Fiber Optics - 718 Telephone Systems and Related Technologies; Line Communications - 717 Optical Communication - 804 Chemical Products Generally - 716 Telecommunication; Radar, Radio and Television - 714.2 Semiconductor Devices and Integrated Circuits - 712.1.1 Single Element Semiconducting Materials - 715 Electronic Equipment, General Purpose and Industrial

DOI:10.1063/1.4802755

Database:Compendex

Accession number:20133016530638

Title:Focused plenoptic camera and spatial resolution improving technology

Authors:Zhao, Juan Ning (1); Dong, Xiao Na (2); Yuan, Suo Chao (1)

Author affiliation:(1) Graduate School of Chinese Academic of Sciences, Beijing 100039, China; (2) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an 710119, China

Source title:Advanced Materials Research

Abbreviated source title:Adv. Mater. Res.

Volume:710

Monograph title:Advanced Technologies and Solutions in Industry

Issue date:2013

Publication year:2013

Pages:419-423

Language:English

ISSN:10226680

ISBN-13:9783037857205

Document type:Conference article (CA)

Conference name:2013 International Conference on Advanced Technologies and Solutions in Industry, ICATSI 2013

Conference date:March 22, 2013 - March 23, 2013

Conference location:Taiyuan, Shanxi, China

Conference code:97849

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:The focused plenoptic cameras based on the rays resampling of microlens array on the image formed by main lens, captures radiation on sensor includes the 4D radiance information. Because of both spatial and angular information are recorded on the sensor of fixed pixels number, when rendering image with fixed view there are limited pixels from sub_image are adopted, this results in disappointingly low resolution of the result image. Our approach presents a new approach to rendering an image with higher spatial resolution than the traditional approach, allowing us to render high resolution images that meet the high requirements. © (2013) Trans Tech Publications, Switzerland.

Number of references:8

Main heading:Cameras

Controlled terms:Image resolution - Pixels - Sensors

Uncontrolled terms:High resolution image - Image rending - Light fields - Low resolution - Micro-lens arrays - Plenoptic cameras - Spatial resolution - Traditional approaches

Classification code:741 Light, Optics and Optical Devices - 742 Cameras and Photography - 742.2 Photographic Equipment - 801 Chemistry

DOI:10.4028/www.scientific.net/AMR.710.419

Database:Compendex

Accession number:20131516204740

Title:Theoretical study of stimulated Brillouin scattering in high-power dual-clad fiber lasers

Authors:Yang, Hening (1); Duan, Kailiang (1); Zhao, Baoyin (1); Zhang, Entao (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an 710119, China

Corresponding author:Duan, K.(kl.duan@163.com)

Source title:Optik

Abbreviated source title:Optik

Volume:124

Issue:11

Issue date:June 2013

Publication year:2013

Pages:1049-1052

Language:English

ISSN:00304026

Document type:Journal article (JA)

Publisher:Urban und Fischer Verlag Jena, P.O. Box 100537, Jena, 07705, Germany

Abstract:A theoretical analysis of stimulated Brillouin scattering (SBS) in linear cavity Yb3+ doped dual-clad fiber lasers is presented by solving the steady-state rate equations with SBS included. Solutions to suppress the detrimental effect in the fiber laser are discussed. It is shown that the first-order Stokes initiated by forward and backward pump light changes exponentially along the fiber, and laser power reduces greatly in the presence of SBS under bidirectional end pump. Furthermore, it is found that the SBS threshold power can be improved effectively by using large mode area fiber and shortening the cavity length. © 2013 Elsevier GmbH. All rights reserved.

Number of references:18

Main heading:Fiber lasers

Controlled terms:Stimulated Brillouin scattering - Ytterbium

Uncontrolled terms:Cavity length - Forward-and-backward - Large mode area fiber - Linear cavity - Steady state rates - Stimulated Brillouin Scattering (SBS) - Stokes wave - Theoretical study

Classification code:547.2 Rare Earth Metals - 741.1 Light/Optics - 741.1.2 Fiber Optics

DOI:10.1016/j.ijleo.2013.01.010

Database:Compendex

Accession number:20124015490647

Title:Image encryption algorithm by using fractional Fourier transform and pixel scrambling operation based on double random phase encoding

Authors:Liu, Zhengjun (1); Li, She (3); Liu, Wei (3); Wang, Yanhua (4); Liu, Shutian (3)

Corresponding author:Liu, Z.(zjliu@hit.edu.cn)

Source title:Optics and Lasers in Engineering

Abbreviated source title:Opt Lasers Eng

Volume:51

Issue:1

Issue date:January 2013

Publication year:2013

Pages:8-14

Language:English

ISSN:01438166

CODEN:OLENDN

Document type:Journal article (JA)

Publisher:Elsevier Ltd, Langford Lane, Kidlington, Oxford, OX5 1GB, United Kingdom

Abstract:To enhance the security of double random phase encoding, a kind of amplitude scrambling operation is designed and introduced into an image encryption process. The random data of the second phase mask in double random phase encoding is also employed for scrambling amplitude distribution in order to save the space of storage and transmission of the key information. The scrambling operator is changeable for generating the key. Some numerical simulations have been provided for testing the validity of the image encryption scheme. © 2012 Elsevier Ltd.

Number of references:34

Main heading:Encoding (symbols)

Controlled terms:Cryptography - Digital storage - Image processing

Uncontrolled terms:Amplitude distributions - Double random-phase encoding - Fractional Fourier transforms - Image encryption algorithm - Image encryption scheme - Image encryptions - Phase encoding - Pixel scrambling - Random data - Second phase

Classification code:716 Telecommunication; Radar, Radio and Television - 717 Optical Communication - 718 Telephone Systems and Related Technologies; Line Communications - 722.1 Data Storage, Equipment and Techniques - 723 Computer Software, Data Handling and Applications - 723.2 Data Processing and Image Processing

DOI:10.1016/j.optlaseng.2012.08.004

Database:Compendex

Accession number:20130315915096

Title:Improvement of chirped pulse contrast using electro-optic birefringence scanning filter method

Authors:Zeng, Shuguang (1); Wang, Xianglin (3); Zhang, Bin (2); Wang, Yishan (3); Sun, Nianchun (2); Wang, Fei (1)

Author affiliation:(1) Research Institute for New Energy, College of Science, China Three Gorges University, Yichang 443002, China; (2) College of Electronics and Information Engineering, Sichuan University, Chengdu 610064, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Zeng, S.(zengshuguang19@sohu.com)

Source title:Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams

Abbreviated source title:Qiangjiguang Yu Lizishu

Volume:25

Issue:1

Issue date:January 2013

Publication year:2013

Pages:47-51

Language:Chinese

ISSN:10014322

CODEN:QYLIEL

Document type:Journal article (JA)

Publisher:Editorial Office of High Power Laser and Particle Beams, P.O. Box 919-805, Mianyang, 621900, China

Abstract:A method using scanning filter to improve the contrast of chirped pulse is proposed, and the principle of this method is analyzed. The scanning filter is compared with the existing pulse-picking technique and nonlinear filtering technique. The scanning filter is a temporal gate that is independent on the intensity of the pulses, but on the instantaneous wavelengths of light. Taking the electro-optic birefringence scanning filter as an example, the application of scanning filter methods is illustrated. Based on numerical simulation and experimental research, it is found that the electro-optic birefringence scanning filter can eliminate a prepulse which is several hundred picoseconds before the main pulse, and the main pulse can maintain a high transmissivity.

Number of references:15

Main heading:Scanning

Controlled terms:Birefringence

Uncontrolled terms:Chirped pulse - Contrast - Electrooptic effects - Experimental research - Filter method - Main pulse - Non-linear filtering techniques - Picoseconds - Prepulses - Transmissivity

Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems

DOI:10.3788/HPLPB20132501.0047

Database:Compendex

Accession number:20140317205655

Title:Doubly adaptive nonlocal means image denoising algorithm based on mathematical morphology

Authors:Jing-Juan, Zhao (1); Zuo-Feng, Zhou (1); Jian-Zhong, Cao (1); Hui, Zhang (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) Graduate University, Chinese Academy of Sciences, Beijing, China

Source title:Proceedings - 2013 5th International Conference on Intelligent Human-Machine Systems and Cybernetics, IHMSC 2013

Abbreviated source title:Proc. - Int. Conf. Intelligent Hum.-Mach. Syst. Cybern., IHMSC

Volume:1

Monograph title:Proceedings - 2013 5th International Conference on Intelligent Human-Machine Systems and Cybernetics, IHMSC 2013

Issue date:2013

Publication year:2013

Pages:301-304

Article number:6643890

Language:English

ISBN-13:9780769550114

Document type:Conference article (CA)

Conference name:2013 5th International Conference on Intelligent Human-Machine Systems and Cybernetics, IHMSC 2013

Conference date:August 26, 2013 - August 27, 2013

Conference location:Hangzhou, Zhejiang, China

Conference code:101433

Publisher:IEEE Computer Society, 2001 L Street N.W., Suite 700, Washington, DC 20036-4928, United States

Abstract:An doubly adaptive nonlocal-means (DANLM) algorithm for image denoising is proposed in this paper. The wavelet-Based denoising method is first used to get the pilot image, and then the pilot image is divided into texture and smooth regions base on mathematical morphology. Finally, the noisy image is denoised by nonlocal means method with patch window and search window adaptively adjust to the local property for different regions. Experiment results demonstrate the superior denoising performance of the proposed denoising technique. © 2013 IEEE.

Number of references:9

Main heading:Image denoising

Controlled terms:Algorithms - Cybernetics - Mathematical morphology

Uncontrolled terms:De-noising techniques - Denoising methods - Image denoisin - Image denoising algorithm - Local property - Non-local means - Search windows - Wavelet-Based filter

Classification code:723 Computer Software, Data Handling and Applications - 921 Mathematics

DOI:10.1109/IHMSC.2013.78

Database:Compendex

Accession number:20131016086788

Title:All-reflective optical bifocal zooming system without moving elements based on deformable mirror for space camera application

Authors:Zhao, Hui (1); Fan, Xuewu (1); Zou, Gangyi (1); Pang, Zhihai (2); Wang, Wei (1); Ren, Guorui (1); Du, Yunfei (1); Su, Yu (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science, No.17, Xinxi Road, High-tech zone, Xi'an 710119, China; (2) Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Zhao, H.(zhaohui1981.zju@gmail.com)

Source title:Applied Optics

Abbreviated source title:Appl. Opt.

Volume:52

Issue:6

Issue date:February 20, 2013

Publication year:2013

Pages:1192-1210

Language:English

ISSN:1559128X

E-ISSN:15394522

CODEN:APOPAI

Document type:Journal article (JA)

Publisher:Optical Society of America, 2010 Massachusetts Ave, NW, Washington, DC, DC 20036-1023, United States

Abstract:The space camera with variable focal length is capable of capturing images with variable resolution and variable field of view. This is useful for space-borne reconnaissance because the camera can switch between coarse and fine reconnaissance flexibly. However, the traditional optical zooming relies on moving elements which might influence the momentum balance of the satellite platform. Therefore, we present a prototype design using the piezo deformable mirror (PDM) to realize an all-reflective optical bifocal zooming system. By changing the curvature radius of the PDM, the focal length can be switched between 48 and 192 mm without moving elements involved. With the focal length experiencing 4× magnification, the system performance is still approaching diffraction-limited performance, and the maximum stroke of the PDM is also within its physical limits. Experiments demonstrate that the principle is correct and the design is successful. © 2013 Optical Society of America.

Number of references:10

Main heading:Cameras

Controlled terms:Molecular physics - Optics

Uncontrolled terms:Curvature radii - Deformable mirrors - Diffraction limited - Field of views - Focal lengths - Momentum balances - Optical zooming - Physical limits - Prototype designs - Satellite platforms - Space cameras - Space-borne - Variable focal length - Variable resolution

Classification code:741.1 Light/Optics - 742.2 Photographic Equipment - 931.3 Atomic and Molecular Physics

DOI:10.1364/AO.52.001192

Database:Compendex

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