Title:Research on Laser Cold Machining Hole Penetration Spectroscopy Detection Technology

Title of translation:激 光 冷 加 工 孔 穿 透 光 谱 检 测 技 术 研 究

Authors:Yan, Qing (1); Peng, Bo (1); Wang, Li (1); Wang, Dong (1); Zhao, Hualong (2); Gao, Fei (1); Hua, Dengxin (1) 

Author affiliation:(1) School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an; 710048, China; (2) Research Center for Photonic Manufacturing System and Application, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China 

Corresponding author:Wang, Li(wlfuyun@xaut.edu.cn)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:52

Issue:3

Issue date:March 2023

Publication year:2023

Article number:0352119

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:<div data-language="eng" data-ev-field="abstract">The ultra-high peak power and ultra-short pulse time characteristics of the femtosecond laser allow it to act quickly on a specific area during machining&#65292;and the material in the area of the laser beam is removed in the form of a plasma eruption to achieve cold machining with almost no thermal impact on the surrounding material. Laser cold machining technology is widely used because of its high processing accuracy&#65292;small heat-affected zone and high machining efficiency. One of the important applications is the machining of air film holes in aero-engine turbine blades. Due to the existence of hollow cavities and the close distance between the opposite walls of the aero-engine turbine blades&#65292;the hole making process is prone to contramural damage. Therefore&#65292;in order to avoid contramural damage and improve the quality of air film hole machining&#65292;a real-time detecting system needs to be developed to judge the hole penetration status during the hole machining in real time. Laser Induced Breakdown Spectroscopy&#65288;LIBS&#65289;is a kind of atomic emission spectroscopy technology&#65292;which has a fast response time and can achieve real-time detection and analysis of the target under test. In the LIBS detection system&#65292;a spectrometer is used to collect the emission spectra excited during the plasma cooling process of femtosecond laser machining&#65292;and the elements corresponding to each spectral line can be identified according to the characteristic wavelength of atomic or ion emission spectra in a specific wavelength band&#65292;and quantitative analysis can be achieved by measuring the intensity of emission spectra captured at a specific wavelength. Aiming at the problem of contramural damage in the machining of aero-engine turbine blade with femtosecond laser&#65292; a hole penetration detection scheme based on laser-induced breakdown spectroscopy detection technology of femtosecond laser hole making is proposed. Based on the elemental analysis of the material and the information of the LIBS spectrogram obtained in the wavelength 520~560 nm during processing&#65292;the emission spectrum of Cr&#65288;I&#65289;521.531 nm is selected as the characteristic spectral line&#65292;and the change in intensity of the characteristic spectral line is used to realize the judgment of the hole machining process. In this paper&#65292;we design a laser cold machining hole penetration spectroscopy detection system consisting of an ultrashort pulse laser&#65292;a grating spectrometer&#65292;a focusing optical path and an upper computer for data processing and analysis. The effect of important machining parameters on the detection performance of LIBS is studied experimentally&#65292;and the effect of machining parameters on the spectral intensity is analyzed&#65292;and the optimized machining parameters are selected as laser energy of 32 W&#65292;the distance of the part to be processed from the focus of 150 mm&#65292;and the laser spin speed of 2 400 r/min. The designed hole penetration detection system is used to continuously collect and analyze the plasma spectra during the actual hole machining&#65292;and the correspondence between the specific spectral intensity and the penetration state of the sample to be processed in the hole machining is obtained. The intensity of the spectrum peaks at the beginning of the hole punching because of the high percentage of upward reflection of the atomic emission spectra during the laser exit stage&#65307;the overall intensity of the atomic emission spectra gradually decreases as the hole depth increases&#65307;the detected intensity of the atomic emission spectra starts to decrease significantly when the hole starts to penetrate gradually&#65307;when the hole is completely penetrated&#65292;there are no reflected back characteristic spectral lines and only background noise with spectral line intensity less than 230. The experimental results verify the feasibility of the method in solving the problem of preventing damage to the opposite wall during femtosecond laser hole machining&#65292;and can provide real-time feedback on the completion of hole processing to help the development of the feedback system&#65292;which is conducive to the further optimization of laser cold machining technology in terms of accuracy and efficiency.<br/></div> &copy; 2023 Chinese Optical Society. All rights reserved.

Number of references:17

Main heading:Damage detection

Controlled terms:Aircraft engines - Atomic emission spectroscopy - Engines - Heat affected zone - Laser damage - Laser induced breakdown spectroscopy - Spectroscopic analysis - Spectrum analysis - Turbomachine blades - Ultrashort pulses

Uncontrolled terms:Aeroengine turbine - Characteristic spectral lines - Contramural damage - Detection system - Emission spectrums - Holes machining - Laser cold machining - Laserinduced breakdown spectroscopy (LIBS) - Penetration detection - Turbine blade

Classification code:538.2  Welding - 653.1  Aircraft Engines, General - 744.8  Laser Beam Interactions - 801  Chemistry - 931.1  Mechanics

Numerical data indexing:Size 5.20E-07m to 5.60E-07m, Size 5.21531E-07m, Angular velocity 6.68E+00rad/s, Power 3.20E+01W, Size 1.50E-01m

DOI:10.3788/gzxb20235203.0352119

Funding details:  Number: 22JY049, Acronym: -, Sponsor: -;Number: 2021YFF0701103, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;

Funding text:National Key Research and Development Program of China&#65288;No. 2021YFF0701103&#65289;&#65292;Key Project of Scientific Research Plan of Education Department of Shaanxi Provincial Government&#65288;No. 22JY049&#65289;

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 105>

 

Accession number:20232614326644

Title:Real-time image processing of space camera based on FPGA

Authors:Duan, Jia Xin (1, 2); Zhang, Hai Feng (2, 3); Zhou, Shun (1); Huang, Ji Jiang (2) 

Author affiliation:(1) Xi'an Technological University, School of Opto-electronical Engineering, Shanxi, Xi'an; 710119, China; (2) Xi'an Institute of Optics and Precision Mechanics of UCAS, University of Chinese Academy of Sciences, Shanxi, Xi'an; 710119, China; (3) XI'An Key Laboratory of Spacecraft Optical Imaging and Measurement Technology, Shanxi, Xi'an; 710119, China 

Corresponding author:Zhang, Hai Feng(Zhanghf@opt.ac.cn)

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:12700

Part number:1 of 1

Issue title:International Conference on Electronic Information Engineering and Data Processing, EIEDP 2023

Issue date:2023

Publication year:2023

Article number:1270022

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510666160

Document type:Conference article (CA)

Conference name:2023 International Conference on Electronic Information Engineering and Data Processing, EIEDP 2023

Conference date:March 17, 2023  -  March 19, 2023

Conference location:Nanchang, China

Conference code:189234

Sponsor:Sichuan University

Publisher:SPIE

Abstract:<div data-language="eng" data-ev-field="abstract">According to the characteristics of space camera subject to working environment and task requirements, the automatic exposure and automatic white balance are analyzed theoretically. Gaussian weight is used to correlate the target position and gray value of image, and the relationship between variable step size adjustment, balance accuracy and speed of automatic exposure is optimized. Automatic white balance performs color temperature estimation in RGB space, enabling accurate image color restoration under different illumination. The optimized design of hardware implementation according to the FPGA characteristics. Through the simulation software analysis and the effect of the hardware system display pictures, it is shown that the FPGA hardware system can run high-definition real-time, fast speed, low power consumption and strong practicability. This hardware system has been used in image processing of space cameras.<br/></div> &copy; 2023 SPIE.

Number of references:10

Main heading:Field programmable gate arrays (FPGA)

Controlled terms:Cameras - Computer software - Image processing

Uncontrolled terms:Automatic exposure - Automatic white balance - Camera-based - Gaussian weight - Hardware system - Position value - Real-time image processing - Space cameras - Target position - Working environment

Classification code:721.2  Logic Elements - 723  Computer Software, Data Handling and Applications - 723.2  Data Processing and Image Processing - 742.2  Photographic Equipment

DOI:10.1117/12.2682281

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 106>

 

Accession number:20230613549807

Title:Theoretical and experimental study on responsivity of ultra-fast X-ray semiconductor chip based on the rad-optic effect

Authors:Yan, Xin (1, 2); Wang, Tao (2); Wang, Gang (2); Yao, Dong (1, 2); Liu, Yiheng (2); Gao, Guilong (2); Xin, Liwei (1, 2); Yin, Fei (2); Tian, Jinshou (2); Chang, Xinlong (1); He, Kai (2) 

Author affiliation:(1) Rocket Force University of Engineering, Xi'an; 710025, China; (2) Key Laboratory of Ultra-fast Photoelectric Diagnostics Technology, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Shaanxi, Xi'an; 710119, China 

Corresponding author:Chang, Xinlong(xinlongch@vip.sina.com)

Source title:Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Abbreviated source title:Nucl Instrum Methods Phys Res Sect A

Volume:1049

Issue date:April 2023

Publication year:2023

Article number:168070

Language:English

ISSN:01689002

CODEN:NIMAER

Document type:Journal article (JA)

Publisher:Elsevier B.V.

Abstract:<div data-language="eng" data-ev-field="abstract">Semiconductor sensors based on the rad-optic effect enable ultra-fast detection of X-rays and play an important role in fusion diagnostics. Obtaining the responsivity of the semiconductor ultrafast response material is an important part of characterization. In this work, the refractive index change mechanism of the semiconductor under X-ray irradiation was analyzed, and the quantitative relationship between the diffraction efficiency and the X-ray photon energy was established through the LT-AlGaAs diffraction imaging experiments. The impulse responses of LT-AlGaAs under 1 keV&ndash;10 keV X-ray radiation were calculated, revealing the variation of responsivity with radiated photon energy. Imaging experiments of LT-AlGaAs were performed by bombarding an Al target to generate 1.5 keV X-rays. The diffraction images were obtained in agreement with the simulations. The responsivity of the semiconductor chip increases with the square of the incident X-ray power density. This study provides meaningful analyses for the development of ultra-fast X-ray imaging systems based on the rad-optic effect.<br/></div> &copy; 2023 Elsevier B.V.

Number of references:20

Main heading:X ray detectors

Controlled terms:Aluminum gallium arsenide - Diffraction - Gallium compounds - Photons - Refractive index

Uncontrolled terms:Chip based - Imaging experiments - Rad-optic effect - Responsivity - Semiconductor chips - Ultra-fast - Ultrafast measurements - Ultrafast response - Ultrafast response semiconductor material - X-ray detector

Classification code:712.1.2  Compound Semiconducting Materials - 741.1  Light/Optics - 931.3  Atomic and Molecular Physics

Numerical data indexing:Electron volt 1.00E+03eV to 1.00E+04eV, Electron volt 1.50E+03eV

DOI:10.1016/j.nima.2023.168070

Funding details:  Number: -, Acronym: -, Sponsor: Eesti Teaduste Akadeemia;Number: 12075312,62005311, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: GJJSTD2022006,XDA25030900, Acronym: CAS, Sponsor: Chinese Academy of Sciences;

Funding text:This work was supported by the National Natural Science Foundation of China, China (Grant Nos. 12075312 and 62005311), by the Science Instrument Developing Project ofChinese Academy of Sciences, China (Grant No. GJJSTD2022006) and the Strategic Priority Program of Chinese Academy of Sciences, China (Grant No. XDA25030900).This work was supported by the National Natural Science Foundation of China, China (Grant Nos. 12075312 and 62005311 ), by the Science Instrument Developing Project of Chinese Academy of Sciences, China (Grant No. GJJSTD2022006 ) and the Strategic Priority Program of Chinese Academy of Sciences, China (Grant No. XDA25030900 ).

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 107>

 

Accession number:20231713946002

Title:F/0.78 High Order Aspheric Surface Testing with Null Compensator and Mapping Distortion Correction

Title of translation:F/0.78 &#39640;&#27425;&#38750;&#29699;&#38754;&#38646;&#20301;&#34917;&#20607;&#26816;&#27979;&#19982;&#25237;&#24433;&#30072;&#21464;&#26657;&#27491;

Authors:Hao, Sanfeng (1, 2); Zhang, Jian (1, 3); Yang, Jianfeng (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; (3) Xidian University, School of Mechano-electronic Engineering, Xi'an; 710071, China 

Corresponding author:Zhang, Jian(zj@opt.ac.cn)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:52

Issue:2

Issue date:February 2023

Publication year:2023

Article number:0212004

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:<div data-language="eng" data-ev-field="abstract">Compared with traditional spherical surfaces&#65292;aspheric surfaces own more degrees of freedom&#65292;which is beneficial to the light weight&#65292;integration and aberration correction of an optical system. In recent years&#65292;with the development and progress of high-precision optical manufacturing technology&#65292;aspheric surfaces have been widely used in the optical systems design in aerospace&#65292;space telephoto and other fields. Meanwhile&#65292;the testing of aspheric surfaces&#65292;especially high-order aspheric surfaces&#65292;is more difficult and is a prerequisite for guiding optical deterministic manufacturing. That is to say&#65292;it is not only necessary to realize the testing of aspheric surfaces&#65292;but also to be able to give correct guidance for manufacturing based on the testing results. At present&#65292;aspheric surfaces testing can be achieved with null lens compensator&#65292;but for high-order aspheric surfaces with a small F-number&#65292;traditional two-piece lens compensator cannot meet the testing accuracy requirements&#65292;and the structure of null lens needs to be further optimized. What's more&#65292;the shape of interfermetric image obtained with null lens compensator is inconsistent with that of the mirror under test&#65292; that is&#65292; mapping distortion. It is worth noting that deterministic manufacturing techniques such as Computer-Controlled Optical Surfacing &#65288;CCOS&#65289;&#65292; Magnetorheological Finishing &#65288;MRF&#65289;&#65292;and Ion Beam Figuring&#65288;IBF&#65289; all require accurate guidance and feedback from interfermetric image&#65292;position errors caused by mapping distortion will seriously affect manufacturing efficiency&#65292;and even lead to a failure. Therefore&#65292;the mapping distortion correction is crucial for the interferometric image to correctly guide deterministic manufacturing. In this paper&#65292;not only the design method of high-order aspheric null lens compensator is discussed&#65292;but also the mapping distortion correction of interferometric image. Firstly&#65292;based on third-order aberration theory and PW method&#65292;the initial structure calculation formula of the high-order aspheric three-piece lens compensator is deduced&#65292;and the above formula is programmed&#65292;which facilitates the null lens compensator design. For an 8th-order even-order aspheric surface with an effective diameter of 314 mm and F/0.78&#65292;the initial structural parameters of null lens compensator were obtained by using the calculation formula. Then&#65292;it is substituted into the optical design software for scaling and optimization&#65292;and finally the design result with PV=0.0096&lambda;&#65292;RMS=0.0012&lambda; &#65288;&lambda;=632.8 nm&#65289;can be obtained&#65292;which can meet the high-precision testing requirements. Furthermore&#65292;a correction method is proposed to solve the problem of mapping distortion in the interferometric image obtained with null lens compensator. This method combines imaging distortion of null lens and an algorithm for solving null distortion point coordinates&#65292;which can conveniently realize the rapid mapping distortion correction. On the one hand&#65292;null lens imaging system with high-order aspheric surfaces as object can be obtained by reversing the testing light path&#65292;and the imaging distortion is consistent with the mapping distortion&#65292;which can be used for mapping distortion correction. On the other hand&#65292;since the null distortion point is also the geometric center of the interfermetric image&#65292;the least squares method is used to fit the circle boundary in combination with the boundary data of interfermetric image&#65292;and then the null distortion point can be obtained. Then&#65292;The correction method is used to correct the mapping distortion of the interferometeric image obtained by null lens compensator. After 6 times of magnetorheological finishing based correction results&#65292;the surface RMS reduced from 0.270&lambda; to 0.019&lambda;&#65292;which verifies the validity and efficiency of this correction method.<br/></div> &copy; 2023 Chinese Optical Society. All rights reserved.

Number of references:24

Main heading:Aspherics

Controlled terms:Aberrations - Degrees of freedom (mechanics) - Interferometry - Ion beams - Lenses - Magnetorheological fluids - Mapping - Mirrors - Optical design - Optical systems  - Optical testing - Polishing

Uncontrolled terms:Compensator design - Deterministic polishing - Distortions corrections - High-order aspheric surfaces - Mapping distortion - Mapping distortion correction - Null lens - Null testing - Optical deterministic polishing - Optical-

Classification code:405.3  Surveying - 604.2  Machining Operations - 708.4  Magnetic Materials - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 931.1  Mechanics - 932.1  High Energy Physics - 941.4  Optical Variables Measurements

Numerical data indexing:Capacitance 3.14E+02F, Size 6.328E-07m

DOI:10.3788/gzxb20235202.0212004

Funding details:  Number: 2018ZDXM-GY-105, Acronym: -, Sponsor: Key Technology Research and Development Program of Shandong;

Funding text:CAS "Light of West China" Program&#65288;No. XAB2016A10&#65289;&#65292;Key Program of Research and Development of Shanxi Province of China&#65288;No. 2018ZDXM-GY-105&#65289;

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 108>

 

Accession number:20232114124231

Title:Regulatory method of 3D Multi-focus Controllable Distribution Based on Computer Generated Holography

Authors:Zhang, Ruidi (1, 2); Chen, Xiaoyi (1, 3); Duan, Yaxuan (1, 3); Wang, Pu (1, 3); Da, Zhengshang (1, 3) 

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Xi'an Key Laboratory of High Power Laser Measurement Technology and Instruments, Shaanxi, Xi'an; 710119, China 

Corresponding author:Da, Zhengshang(dazhengshang@opt.ac.cn)

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:12595

Part number:1 of 1

Issue title:Advanced Fiber Laser Conference, AFL 2022

Issue date:2023

Publication year:2023

Article number:125951U

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510663145

Document type:Conference article (CA)

Conference name:2022 Advanced Fiber Laser Conference, AFL 2022

Conference date:November 11, 2022  -  November 13, 2022

Conference location:Changsha, China

Conference code:187972

Sponsor:The Chinese Society for Optical Engineering

Publisher:SPIE

Abstract:<div data-language="eng" data-ev-field="abstract">Traditional analytical algorithm needs to combine the transmission functions of grating and lens to generate a computer generated hologram (CGH), so as to realize the distribution of three-dimensional (3D) multi-focal points in space, but the grating phase will inevitably produce high-order diffraction focus, resulting in energy loss, and the traditional analytic algorithm is more suitable for generating array multi-focal distribution with equal spacing. To solve this problem, this paper simplifies the traditional analytical algorithm, and proposes a method that only uses multi-lens phase and random phase superposition to generate the CGH required by the target light location, by changing the focal length of the lens phase, the multi-focus distribution along the z-axial direction of multiple independent focal planes is realized. Then the phase of these different focal planes is superimposed, and a 0~2&pi; random phase modulation is added, which can quickly generate 3D multi-focus distribution with controllable number and position. The simulation results show that the energy uniformity of focal spot on each focal plane is between 89.45% and 98.08%. The experimental results show that the energy uniformity of focal spots on each focal plane is between 88.40% and 96.13%, which is consistent with the simulation results. Compared with traditional analytical algorithm, the proposed method is more universal for multi-focus distribution in 3D space without special requirements of array distribution with equal spacing, and has potential application value in laser processing, holographic optical tweezers, optical communication and other fields.<br/></div> &copy; 2023 SPIE.

Number of references:16

Main heading:Optical communication

Controlled terms:Computer generated holography - Diffraction gratings - Energy dissipation - Femtosecond lasers - Focusing - Holograms - Light modulators - Optical signal processing - Optical tweezers

Uncontrolled terms:3d multi-focus - Analytic algorithm - Analytical algorithms - Computergenerated holograms (CGH) - Energy - Femtosecond laser processing - Focal Plane - Multi-focus - Optical field modulations - Random-phase

Classification code:525.4  Energy Losses (industrial and residential) - 717.1  Optical Communication Systems - 723.5  Computer Applications - 741.3  Optical Devices and Systems - 743  Holography - 743.1  Holographic Techniques - 744.1  Lasers, General - 744.9  Laser Applications

Numerical data indexing:Percentage 8.84E+01% to 9.613E+01%, Percentage 8.945E+01% to 9.808E+01%

DOI:10.1117/12.2668871

Funding details:  Number: -, Acronym: -, Sponsor: Key Technology Research and Development Program of Shandong;Number: 61705254, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021YFC2203501, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;

Funding text:In this paper, the research was sponsored by National Natural Science Foundation of China (No.61705254), National Key R&D Program of China (No.2021YFC2203501), Key Research and Development Program of Shaanxi Province of China (No.2020GY-114).

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 109>

 

Accession number:20231413849337

Title:VCSEL Cavity Loss and Gain Measurement for High-Speed Optical Interconnects

Authors:Wang, Binhao (1); Sorin, Wayne V. (2); Tan, Michael R.T. (3) 

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi&#x0027;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&#x0027;an, China; (2) Hewlett Packard Labs, Hewlett Packard Enterprise, Milpitas, CA, USA; (3) Lumentum, San Jose, CA, USA 

Source title:Journal of Lightwave Technology

Abbreviated source title:J Lightwave Technol

Issue date:2023

Publication year:2023

Pages:1-7

Language:English

ISSN:07338724

E-ISSN:15582213

CODEN:JLTEDG

Document type:Article in Press

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:<div data-language="eng" data-ev-field="abstract">Over 100&#x00A0;Gb/s Four-level Pulse-Amplitude Modulation (PAM4) Vertical-Cavity Surface-Emitting Laser (VCSEL) based optical interconnects require high speed, damped, and low relative intensity noise (RIN) VCSELs. Measurement techniques for intrinsic parameters are essential for optimizing VCSEL designs. The proposed VCSEL cavity round-trip loss and gain coefficient measurement provides the insight of VCSEL distributed Bragg reflectors (DBRs) and quantum well (QW) design. A simple VCSEL cavity model is described and excellent matching between the model and measurement is achieved.<br/></div> IEEE

Main heading:Surface emitting lasers

Controlled terms:Laser mirrors - Laser pulses - Optical interconnects - Optical waveguides - Quantum well lasers - Reflection - Semiconductor quantum wells - Transceivers

Uncontrolled terms:Cavity loss - High Speed - High speed optical interconnects - High-low - Laser-based - Loss measurement - Low relative intensity noise - Optical interconnect - Vertical-cavity surface emitting laser

Classification code:714.2  Semiconductor Devices and Integrated Circuits - 714.3  Waveguides - 716.3  Radio Systems and Equipment - 741.3  Optical Devices and Systems - 744.1  Lasers, General - 744.7  Laser Components

DOI:10.1109/JLT.2023.3262193

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 110>

 

Accession number:20230713574415

Title:Study on the influence of spectral overflow and its correction method of push broom static hadamard transform spectral imager

Authors:Zhou, Yingshu (1, 2); Gao, Xiaohui (1); Liu, Jie (1); Liu, Xuebin (1) 

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

Corresponding author:Gao, Xiaohui(gaoxhui@163.com)

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:12558

Part number:1 of 1

Issue title:AOPC 2022: Optical Spectroscopy and Imaging

Issue date:2023

Publication year:2023

Article number:1255807

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510662308

Document type:Conference article (CA)

Conference name:2022 Applied Optics and Photonics China: Optical Spectroscopy and Imaging, AOPC 2022

Conference date:December 18, 2022  -  December 19, 2022

Conference location:Virtual, Online, China

Conference code:186190

Sponsor:Chinese Society for Optical Engineering (CSOE)

Publisher:SPIE

Abstract:<div data-language="eng" data-ev-field="abstract">Hadamard transform spectral imaging technology has high signal-To-noise ratio and the advantage in energy distribution. In recent decades, related works focus on dynamic coding Hadamard spectral imager instead of static coding ones. The latter has great potential value in spaceborne and airborne applications, but the accuracy of its restored spectral image data is poor at present. Therefore, it is necessary to further study the formation mechanism and correction method of errors in static coding Hadamard spectral imager. In this paper, the influencing mechanism and correction method of spectral overflow are studied. Firstly, the imaging and restoration process of the Hadamard coding spectral imager with spectral overflow is mathematically deduced, and the conclusion is compared with the simulated restoration results. Secondly, the simulated results are compared with the experimental data, verifying that spectral overflow is an important source of the error in experimental results. Finally, a correction method for eliminating spectral overflow errors under certain conditions is proposed, and the effectiveness of the method is verified by simulation. This paper can provide reference for the design and data restoration of static coding Hadamard spectral imager.<br/></div> &copy; COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

Number of references:12

Main heading:Image reconstruction

Controlled terms:Error correction - Hadamard transforms - Image coding - Restoration - Signal encoding - Signal to noise ratio

Uncontrolled terms:Encodings - Errors correction - Hadamard - Hadamard encoding - Push broom - Simulation - Spectral image restoration - Spectral images - Spectral imaging - Spectral overflow

Classification code:716.1  Information Theory and Signal Processing - 921.1  Algebra

DOI:10.1117/12.2647236

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 111>

 

Accession number:20232114127038

Title:Free-form surface reconstruction of off-axis three mirror optical system based on Rhino

Authors:Chang, Lingying (1); Chen, Kui (1); Zhao, Yuhang (1); Qiu, Yuehong (2); Wang, Guanru (1); Wang, Xinyou (1) 

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

Corresponding author:Chang, Lingying(sophia_chang@126.comTel)

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:12565

Part number:1 of 1

Issue title:Conference on Infrared, Millimeter, Terahertz Waves and Applications, IMT 2022

Issue date:2023

Publication year:2023

Article number:125653S

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510662476

Document type:Conference article (CA)

Conference name:2022 Conference on Infrared, Millimeter, Terahertz Waves and Applications, IMT 2022

Conference date:September 20, 2022  -  September 22, 2022

Conference location:Xi'an, China

Conference code:188255

Sponsor:Chinese Society for Optical Engineering (CSOE)

Publisher:SPIE

Abstract:<div data-language="eng" data-ev-field="abstract">With the development of modern space optical system, off-axis reflective system with wide spectrum, high resolution and large field of view has become the main direction of optical design. However, the off-axis property of off-axis reflective structure brings asymmetric aberration, which makes designers use free-form surface frequently to correct the aberration of optical system and improve the imaging quality. When the Trace Pro optical mechanical simulation software cannot accurately convert the optical system with free-form surface in CODE V, it is difficult to simulation stray light and analysis environmental in the subsequent studies. The reconstruction of free-form surface of off-axis three mirror optical systems are realized by Rhino in this paper. For the free-form surface in the off-axis three mirror optical systems designed by CODE V, a uniform circular dot ring array sampling method based on polar coordinates is proposed to obtain the free-form surface point cloud data. The point deviation of 5mm-80mm was analyzed, and the optimal sampling interval for the point cloud data of XY polynomial free-form surface with an aperture of 150mm was determined to be 10mm; The NURBS method is used to reconstruct the free-form surface model in Rhino, and the free-form surface reconstruction of the off-axis three mirror optical system is modeled in Trace Pro. Through the simulation of imaging optical path and the analysis of image point dispersion spot radius, it is verified that the free-form surface model of off-axis three mirror optical system can be reconstructed based on rhino. This research provides an effective method reference for optical mechanical joint simulation analysis.<br/></div> &copy; 2023 SPIE.

Number of references:14

Main heading:Optical systems

Controlled terms:Aberrations - Codes (symbols) - Computer software - Mirrors - Optical design - Stray light - Surface measurement - Surface reconstruction

Uncontrolled terms:Free-form surface - Off-axis - Off-axis three mirror optical system - Optical free-form surface - Optical- - Point cloud data - Rhino - Surface modeling - Surfaces reconstruction - Trace pro

Classification code:723  Computer Software, Data Handling and Applications - 723.2  Data Processing and Image Processing - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 943.2  Mechanical Variables Measurements

Numerical data indexing:Size 1.00E-02m, Size 1.50E-01m, Size 5.00E-03m to 8.00E-02m

DOI:10.1117/12.2663242

Funding details:  Number: 61475190, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:Project supported by National Natural Science Foundation of China(Grant No.61475190)

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 112>

 

Accession number:20225213290363

Title:Push-broom compressive hyperspectral imaging method based on self-fusion refinement

Authors:Zhu, Mengjun (1); Yi, Wenjun (1); Du, Junyi (2); Zhu, Shuyue (1); Qi, Junli (1); Fu, Meicheng (1); Li, Libo (3); Li, Xiujian (1) 

Author affiliation:(1) College of Sciences, National University of Defense Technology, deyaroad109, Changsha; 410073, China; (2) School of Computer Science and Technology, Xidian University, Xi'an; 710071, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China 

Corresponding author:Yi, Wenjun(yiwenjun@nudt.edu.cn)

Source title:Optics Communications

Abbreviated source title:Opt Commun

Volume:530

Issue date:March 1, 2023

Publication year:2023

Article number:129198

Language:English

ISSN:00304018

CODEN:OPCOB8

Document type:Journal article (JA)

Publisher:Elsevier B.V.

Abstract:<div data-language="eng" data-ev-field="abstract">Compressive hyperspectral imaging (CHI) with random encoding mask usually suffers from various noises and artifacts. Inspired by the dual-camera CHI techniques based on hyperspectral (HS) and multispectral (MS) image fusion, herein, we present a single-camera push-broom CHI method based on self-fusion refinement (SFR). In this work, the MS guidance image for data fusion is derived directly from the raw solved HS data cube itself rather than any additional data source, which turns cross-fusion into self-fusion; furthermore, a modified joint bilateral filtering (JBF) fusion algorithm is developed to adapt this self-fusion problem, and an adaptive range Gaussian radius is adopted to avoid the invalidation or over-smoothing effects so as to ensure spatial and spectral improvement. The visualized and quantitative assessment results both demonstrate that the proposed method achieves high-quality HS imaging in terms of noise and artifact removal and spatial&ndash;spectral fidelity. Furthermore, the proposed method has a great flexibility and extensibility, whose performances highly depend on the exact fusion algorithm adopted, and a more suitable fusion algorithm will lead to better reconstruction quality; herein, the SFR process by the modified JBF achieves better performances than SFR by guided filtering (GF) or Markov random field (MRF).<br/></div> &copy; 2022 Elsevier B.V.

Number of references:33

Main heading:Cameras

Controlled terms:Hyperspectral imaging - Image enhancement - Image fusion - Markov processes - Nonlinear filtering - Structural frames

Uncontrolled terms:Bilateral filtering - Dual cameras - Encoding masks - Fusion algorithms - Hyperspectral imaging techniques - Imaging method - Modified joint bilateral filtering - Performance - Push-broom compressive hyperspectral imaging - Self-fusion refinement

Classification code:408.2  Structural Members and Shapes - 716.1  Information Theory and Signal Processing - 723.2  Data Processing and Image Processing - 742.2  Photographic Equipment - 746  Imaging Techniques - 922.1  Probability Theory

DOI:10.1016/j.optcom.2022.129198

Funding details:  Number: 11704411,62005207,62005317, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2019JJ40341,2021JJ40695, Acronym: -, Sponsor: Natural Science Foundation of&nbsp;Hunan Province;Number: 2020YFA0713504, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;

Funding text:This work was supported by the National Natural Science Foundation of China ( 62005317 , 11704411 , 62005207 ); Natural Science Foundation of Hunan Province, China ( 2019JJ40341 , 2021JJ40695 ); The National Key Research and Development Program of China (NKRDPC Grant NO. 2020YFA0713504 ).

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 113>

 

Accession number:20230513536677

Title:Position linearity analysis of circular arc terminated resistive anode using finite element method for photon-counting imaging detectors    (Open Access)

Authors:Yang, Kai (1, 2); Bai, Yonglin (1, 2); Cao, Weiwei (1); Yang, Yang (1); Zhu, Bingli (1); Zheng, Jinkun (1); Bai, Xiaohong (1); Chen, Zhen (1); Wang, Bo (1, 2) 

Author affiliation:(1) Key Laboratory of Ultrafast Photoelectric Diagnostic Technology, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences (CAS), Beijing; 100049, China 

Corresponding author:Wang, Bo(wbo@opt.ac.cn)

Source title:Review of Scientific Instruments

Abbreviated source title:Rev. Sci. Instrum.

Volume:94

Issue:1

Issue date:January 1, 2023

Publication year:2023

Article number:013703

Language:English

ISSN:00346748

E-ISSN:10897623

CODEN:RSINAK

Document type:Journal article (JA)

Publisher:American Institute of Physics Inc.

Abstract:<div data-language="eng" data-ev-field="abstract">This study proposes a comprehensive model of the circular arc terminated (CAT) resistive anode based on the finite element method to explore the dynamic process of charge diffusion on this anode and its position linearity performance. The waveforms of charges of the electrodes on the anode are calculated for different electrical parameters and their influence on positional linearity is investigated. The influence of the signal development time and the non-uniformity of the resistance per square of the anode on positional linearity is also analyzed. The results of simulations show that the non-linearity of the image varies monotonically with the termination resistance and the non-uniformity of the resistance per square of the anode, but has a non-linear relationship with the signal development time and the ratio of the resistance per square. A CAT resistive anode with capacitance c and a resistance per square of the sensitive area of R can be used to recover an image with a root mean-squared non-linearity of 2%, when the charge signals of the electrode are collected for at least 0.6R s. The reliability of the results of the simulations was verified with experimental measurements.<br/></div> &copy; 2023 Author(s).

Number of references:22

Main heading:Anodes

Controlled terms:Finite element method

Uncontrolled terms:Charge diffusion - Circular arc - Comprehensive modeling - Development time - Dynamic process - Imaging detector - Nonuniformity - Performance - Photon-counting imaging - Resistive anodes

Classification code:714.1  Electron Tubes - 921.6  Numerical Methods

Numerical data indexing:Percentage 2.00E+00%

DOI:10.1063/5.0118899

Funding details:  Number: 12027803,61904202, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:This work was supported by the National Natural Science Foundation of China, under Grant Nos. 61904202 and 12027803.

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

Open Access type(s): All Open Access, Hybrid Gold

 

<RECORD 114>

 

Accession number:20232614325902

Title:Design of optical system for wide-spectrum visible-short wave infrared imaging

Title of translation:&#23485;&#20809;&#35889;&#21487;&#35265;-&#30701;&#27874;&#32418;&#22806;&#25104;&#20687;&#20809;&#23398;&#31995;&#32479;&#35774;&#35745;

Authors:Xuan, Bin (1); Zhao, Zeyu (2); Luo, Yaowei (3); Wei, Qun (3); Zhu, Yixian (1); Wang, Yajun (4) 

Author affiliation:(1) School of Mechanical Engineering, Nantong University, Nantong; 226019, China; (2) Faculty of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an; 710049, China; (3) Nanjing Huaopt Technology CO. LTD, Nanjing; 210000, China; (4) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China 

Corresponding author:Wang, Yajun

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

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

Volume:52

Issue:4

Issue date:April 2023

Publication year:2023

Article number:20220638

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics

Abstract:<div data-language="eng" data-ev-field="abstract">Objective The industrial lens for machine vision inspection needs not only to meet the design requirements of lightweight and large field of view, but also have high luminous flux. In this paper, based on the needs of machine vision engineering applications, an optical system for wide-spectrum visible-short wave infrared imaging is designed using the optical design software ZEMAX. The Wide spectrum visible-short wave infrared imaging system can operate in the band of 0.4-1.7 &mu;m. The system is composed of 7 groups of 10 lenses. The MTF value is greater than 0.4 at the Nyquist frequency of 100 lp/mm. The F number of the system is 2.8, and the distortion is less than 1.4%. All kinds of aberrations have been well corrected and balanced. And the system has good imaging performance. It has certain reference value for the design of similar optical systems. Methods The optical system structures are usually divided into refractive system, reflective system and hybrid system. Different optical system structures have their own advantages and disadvantages. According to the imaging performance of the system and the cost-performance ratio in industrial applications, the refractive system can meet the requirements of large field of view, low distortion and compact structure. The refractive system is used to observe through refraction of transmitted light, so it is widely used in optical structure selection. At the time, by using the conventional processing and adjustment methods, it can meet the accuracy requirements. It has the characteristics of stable image quality, small stray light and high element transmittance. Results and Discussions According to the actual needs of industrial testing, the main parameters to be considered in the structural design of the wide-spectrum visible-short wave infrared imaging optical system are lens material, working band, focal length, F number, field angle, total length of the system, etc. Based on the analysis of the parameters of the wide-band infrared imaging system, the resolution CMOS area array detector is 2 448&times;2 048. The pixel size is 3.45 &mu;m. The target size is 2/3 inch (1 inch=2.54 cm), and the lens has stable optical performance and good imaging quality in the operating temperature range of 0-50 &#8451;. After the initial structure of the system is determined, the design structure is further optimized using subsequent repeated aberration correction. The optimized wide-spectrum visible-short wave infrared imaging optical system is composed of 7 groups of lenses, and the number of the lenses is 10. The diaphragm is located on the rear surface of the fourth lens, and the front surface of the tenth lens is aspheric. The total length of the system is 79.6 mm, the diameter of the entrance pupil is 9.9 mm, and the F-number is 2.8. It can image in the visible light and short-wave infrared bands. After testing, the point array of the system's field of view is very close to the Airy spot, which is close to the diffraction limit, and meets the imaging requirements. The maximum astigmatism and field curvature of the system is 0.1 mm, and the maximum distortion is 1.4%, which meets the requirements of the system design for field curvature and distortion. The systematic tolerance is analysed based on diffraction MTF average. According to the experience and actual technological level, firstly, relatively loose tolerance preset value of each parameter is given, and then the tolerance analysis is carried out based on the design results, finally the particularly sensitive tolerance is found out and the tolerance is reallocated. Through Monte Carlo analysis of MTF, the results show that at 100 lp/mm, the nominal value of MTF is 0.559, the best value is 0.554, the worst value is 0.333, the average value is 0.481, and the standard deviation is 0.052, the MTF of 90% of the lens&ge; 0.410, the MTF of 50% of the lens &ge; 0.427, and the MTF of 10% of the lens&ge; 0.540. Based on the results, the MTF can meet the technical index requirements under the given tolerance. In order to better prove the performance of the optical system, the bruises in the interior of agricultural products are taken with a visible light band camera and a short-wave infrared camera respectively, which proved that the bruises can be clearly seen in the object image of this wavelength by SWIR imaging. The ability of SWIR to penetrate plastic was proved by shooting through plastic bottles. The experiment proves that the system has good detection effect in industrial detection. Conclusions With the increasing demand of machine vision for composite image information, the modern optical imaging technology will expand beyond the visible and near-infrared bands. Short-wave infrared will be more widely used in the future because of its resolution comparable to visible light and unique optical performance.<br/></div> &copy; 2023 Chinese Society of Astronautics. All rights reserved.

Number of references:14

Main heading:Optical design

Controlled terms:Application programs - Computer vision - Hybrid systems - Image resolution - Imaging systems - Lenses - Optical systems - Stray light - Thermography (imaging)

Uncontrolled terms:Broad spectrum - F/number - Large field of views - Light imaging - Machine-vision - Refractive systems - Short wave infrared - Visible light - Visible light imaging - Wide spectrum

Classification code:723  Computer Software, Data Handling and Applications - 723.5  Computer Applications - 741.1  Light/Optics - 741.2  Vision - 741.3  Optical Devices and Systems - 742.1  Photography - 746  Imaging Techniques - 921  Mathematics

Numerical data indexing:Percentage 1.00E+01%, Percentage 1.40E+00%, Percentage 5.00E+01%, Percentage 9.00E+01%, Size 1.00E-04m, Size 2.54E-02m, Size 3.45E-06m, Size 4.00E-07m to 1.70E-06m, Size 7.62E-02m, Size 7.96E-02m, Size 9.90E-03m

DOI:10.3788/IRLA20220638

Funding details:  Number: 61903204, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:National Natural Science Foundation of China (61903204)

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 115>

 

Accession number:20231013667052

Title:Proportional fairness secrecy beamforming for massive MIMO-SWIPT systems with low-resolution ADCs

Authors:Li, Hao (1); Cao, Jiawei (1); Li, Qi (1); Zhang, Shengyi (1); Zhao, Yijiu (1); Wang, Zhigang (1); Meng, Jiacheng (2, 3); Wang, Houjun (1) 

Author affiliation:(1) School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, China; (3) University of Chinese Academy of Sciences, Beijing, China 

Corresponding authors:Wang, Zhigang(wangzhigang@uestc.edu.cn); Meng, Jiacheng(mengjiacheng@opt.ac.cn)

Source title:Digital Signal Processing: A Review Journal

Abbreviated source title:Digital Signal Process Rev J

Volume:136

Issue date:May 2023

Publication year:2023

Article number:103943

Language:English

ISSN:10512004

CODEN:DSPREJ

Document type:Journal article (JA)

Publisher:Elsevier Inc.

Abstract:<div data-language="eng" data-ev-field="abstract">Simultaneous wireless information and power transfer (SWIPT) technology is one of the solutions to the energy shortage problem in Massive multiple-input and multiple-output (MIMO) systems, while the low-resolution analog-to-digital convertor (ADC) is a potential way to significantly reduce the power consumption of radio frequency circuits in Massive MIMO enabled SWIPT systems. In this paper, we focus on the secrecy transmission maximization problem for Massive MIMO-SWIPT systems over Nakagami-m fading channels, where a low-resolution ADC quantization model and a non-linear energy harvester are exploited. By considering proportional fairness, a joint beamforming design and power allocation problem are proposed to achieve the sum logarithmic secrecy rates. To tackle the non-convex maximization problem, the suboptimal solutions of the beamforming design and power allocation are respectively obtained based on a successive convex approximation and a semidefinite relaxation. Numerical results demonstrate the effectiveness of the proposed joint optimization scheme.<br/></div> &copy; 2023

Number of references:28

Main heading:Energy transfer

Controlled terms:Analog to digital conversion - Beamforming - Digital radio - Fading (radio) - Fading channels

Uncontrolled terms:Analog-to-digital convertors - Information and power transfers - Low-resolution analog-to-digital convertor - Lower resolution - Massive multiple-input and multiple-output - Maximization problem - Multiple input and multiple outputs - Power transfer systems - Proportional fairness - Simultaneous wireless information and power transfer

Classification code:711.2  Electromagnetic Waves in Relation to Various Structures - 716.3  Radio Systems and Equipment

DOI:10.1016/j.dsp.2023.103943

Funding details:  Number: 2021M700707, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: -, Acronym: UBC, Sponsor: University of British Columbia;Number: 2022NSFSC0905, Acronym: -, Sponsor: Natural Science Foundation of Sichuan Province;

Funding text:Hao Li received the Ph.D. degree with the School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu, China, in 2020. He is currently a Postdoctoral with the Shenzhen Institute for Advanced Study, University of Electronic Science and Technology of China, Shenzhen, China, and also with the School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu, China. He has been visiting the Wireless Communication Group, The University of British Columbia, Kelowna, BC, Canada, from 2017 to 2019, sponsored by the China Scholarship Council. His current research interests include 5G cellular networks, resource allocation optimization, Massive MIMO and heterogeneous networks.This document is the results of the research project funded by China Postdoctoral Science Foundation ( 2021M700707 ), and supported by Natural Science Foundation of Sichuan Province ( 2022NSFSC0905 ).

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 116>

 

Accession number:20230613537948

Title:Research on assembly method of non-coaxial transmissive optical system

Authors:LeiYu (1, 2); Ma, Caiwen (1); Kang, Shifa (1); Yin, Yamei (1); Cao, Mingqiang (1) 

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, CAS, NO.17 Xinxi Road, Xi'an Hi-Tech Industrial Development Zone, Shaanxi, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, No.19(A) Yuquan Road, Shijingshan District, Beijing; 100049, China 

Corresponding author:LeiYu

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:12507

Part number:1 of 1

Issue title:Advanced Optical Manufacturing Technologies and Applications 2022; and 2nd International Forum of Young Scientists on Advanced Optical Manufacturing, AOMTA and YSAOM 2022

Issue date:2023

Publication year:2023

Article number:125071C

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510661264

Document type:Conference article (CA)

Conference name:Advanced Optical Manufacturing Technologies and Applications 2022, AOMTA 2022 and 2nd International Forum of Young Scientists on Advanced Optical Manufacturing, YSAOM 2022

Conference date:July 29, 2022  -  July 31, 2022

Conference location:Changchun, China

Conference code:186036

Sponsor:Changchun Institute of Optics, Fine Mechanics and Physics, CAS; Changchun University of Science and Technology; Changchun University of Technology; et al.; Jilin University; University of Shanghai for Science and Technology

Publisher:SPIE

Abstract:<div data-language="eng" data-ev-field="abstract">Coaxial transmission optical systems can be assembled by optical centering processing and optical centering assembly to eliminate the eccentricity and tilt of each lens, thus ensuring the coaxiality of the lens. Non-coaxial transmission optical systems cannot be assembled by the traditional optical centering method, and this type of system poses a new challenge to the assembly method. Aiming at a non-coaxial transmissive optical system, this paper proposes a precise assembly method based on the spatial coordinate change and the principle of self-collimation imaging. Firstly, we calculate the spatial angle and eccentricity value of different axis mirror groups, and then use two self-collimating theodolites and optical reticle centering tools to construct the spatial angle reference and eccentricity reference for different axis mirror groups. Then, the spatial position of each lens group is determined by the adjustment method of auto-collimation. The article finally carried out the alignment experiment. The wavefront RMS of the optical system after alignment is 0.026&lambda;@632.8nm which meets the design requirements and verifies the effectiveness of the proposed method.<br/></div> &copy; 2023 SPIE.

Number of references:10

Main heading:Alignment

Controlled terms:Lenses - Light transmission - Mirrors - Optical instruments - Optical systems

Uncontrolled terms:Auto-collimation - Coaxial transmission - Coaxiality - Eccentricity and tilt - Non-coaxial transmissive optical system - Optical centring - Precise assembly - Spatial angle - Transmission optical systems - Transmissive optical system

Classification code:601.1  Mechanical Devices - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 941.3  Optical Instruments

Numerical data indexing:Size 6.328E-07m

DOI:10.1117/12.2655612

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 117>

 

Accession number:20231914055642

Title:Recent advances of lanthanide nanomaterials in Tumor NIR fluorescence detection and treatment    (Open Access)

Authors:Fan, Qi (1, 2); Sun, Chao (1, 2); Hu, Bingliang (1); Wang, Quan (1, 2) 

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences, Xi'an; 710119, China; (2) Key Laboratory of Biomedical Spectroscopy of Xi'an, Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences, Xi'an; 710119, China 

Corresponding authors:Wang, Quan(wangquan@opt.ac.cn); Fan, Qi(fanqi@opt.ac.cn)

Source title:Materials Today Bio

Abbreviated source title:Mater. Today Bio.

Volume:20

Issue date:June 2023

Publication year:2023

Article number:100646

Language:English

E-ISSN:25900064

Document type:Journal article (JA)

Publisher:Elsevier B.V.

Abstract:<div data-language="eng" data-ev-field="abstract">Lanthanide nanomaterials have garnered significant attention from researchers among the main near-infrared (NIR) fluorescent nanomaterials due to their excellent chemical and fluorescence stability, narrow emission band, adjustable luminescence color, and long lifetime. In recent years, with the preparation, functional modification, and fluorescence improvement of lanthanide materials, great progress has been made in their application in the biomedical field. This review focuses on the latest progress of lanthanide nanomaterials in tumor diagnosis and treatment, as well as the interaction mechanism between fluorescence and biological tissues. We introduce a set of efficient strategies for improving the fluorescence properties of lanthanide nanomaterials and discuss some representative in-depth research work in detail, showcasing their superiority in early detection of ultra-small tumors, phototherapy, and real-time guidance for surgical resection. However, lanthanide nanomaterials have only realized a portion of their potential in tumor applications so far. Therefore, we discuss promising methods for further improving the performance of lanthanide nanomaterials and their future development directions.<br/></div> &copy; 2023 The Authors

Number of references:208

Main heading:Fluorescence imaging

Controlled terms:Chemical stability - Diagnosis - Infrared devices - Medical imaging - Nanostructured materials - Rare earth elements - Rare earths - Tumors

Uncontrolled terms:Fluorescence detection - Fluorescence imaging - Infrared windows - Lanthanide nanomaterial - Near Infrared - Near infrared window - Near-infrared - Near-infrared fluorescence - Rare-earths - Therapy

Classification code:461.1  Biomedical Engineering - 461.2  Biological Materials and Tissue Engineering - 461.6  Medicine and Pharmacology - 547.2  Rare Earth Metals - 746  Imaging Techniques - 761  Nanotechnology - 801  Chemistry - 804.2  Inorganic Compounds - 933.1  Crystalline Solids

DOI:10.1016/j.mtbio.2023.100646

Funding details:  Number: 29J20-015-,29J20-052-, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2022JQ544, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;

Funding text:The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: Natural Science Basic Research Plan in Shaanxi Province of China (No. 2022JQ544 ), "From 0 to 1&Prime; Original Innovation Project of the Basic Frontier Scientific Research Program of the Chinese Academy of Sciences ( 29J20-015-&#8546; ) and Chinese Academy of Sciences's 100 Talents Project: Research on Task oriented Functional Brain Development of Infants ( 29J20-052-&#8546; ).

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

Open Access type(s): All Open Access, Gold, Green

 

<RECORD 118>

 

Accession number:20230713598459

Title:Spatial coupling efficiency of collimators based on gradient-index lens with an angle polish

Authors:Song, Wei (1, 2, 3); Xie, Youjin (1, 2); Hao, Wei (1, 2); Han, Junfeng (1, 2); Yan, Peipei (1, 2); LI, Xin (1, 2); Wang, Yifan (1, 2); Li, Xiangyu (1, 2); Sun, Chuandong (1); Li, Zhiguo (1, 2) 

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) Key Laboratory of Space Precision Measurement Technology, 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:Li, Zhiguo(lzg@opt.ac.cn)

Source title:Optics and Laser Technology

Abbreviated source title:Opt Laser Technol

Volume:162

Issue date:July 2023

Publication year:2023

Article number:109245

Language:English

ISSN:00303992

CODEN:OLTCAS

Document type:Journal article (JA)

Publisher:Elsevier Ltd

Abstract:<div data-language="eng" data-ev-field="abstract">As high coupling efficiency and return loss are crucial in fiber-optic transmission systems, they have attracted widespread attention. This study proposes a ray-transfer matrix-based mathematical analysis method and experimentally demonstrates a collimator based on a gradient-index lens with an angle polish. The propagation characteristics and coupling mechanisms of the collimators are introduced. A beam-steering technology based on a wedge prism and flat glass is proposed to improve the coupling efficiency of the Gaussian beam using collimators. The proposed method is validated via simulation and experiment. The results are significant in free-space optical communication, optical signal processing, and optical fiber connectors.<br/></div> &copy; 2023 Elsevier Ltd

Number of references:19

Main heading:Gaussian beams

Controlled terms:Efficiency - Lenses - Optical collimators - Optical fiber communication - Optical fibers - Signal processing - Transfer matrix method

Uncontrolled terms:Beam-steering - Beam-steering technology - Coupling efficiency - Efficiency loss - Fiber-optic transmissions - Gradient-index lens - In-fiber - Returns loss - Spatial couplings - Transmission systems

Classification code:711  Electromagnetic Waves - 716.1  Information Theory and Signal Processing - 717.1  Optical Communication Systems - 741.1.2  Fiber Optics - 741.3  Optical Devices and Systems - 913.1  Production Engineering - 921  Mathematics

DOI:10.1016/j.optlastec.2023.109245

Funding details:  Number: 2021YFC2202103, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;

Funding text:This work was supported by the National Key Research and Development Program of China ( 2021YFC2202103 ).

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 119>

 

Accession number:20230713574401

Title:Stability research of fore-Telescope system with mechanical passive athermalization design

Authors:Sun, Jian (1, 2); Wang, Wei (1); Hu, Bing-Liang (1); Li, Si-Yuan (1); Zou, Chun-Bo (1); Feng, Yu-Tao (1) 

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

Corresponding authors:Wang, Wei; Feng, Yu-Tao

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:12558

Part number:1 of 1

Issue title:AOPC 2022: Optical Spectroscopy and Imaging

Issue date:2023

Publication year:2023

Article number:125580F

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510662308

Document type:Conference article (CA)

Conference name:2022 Applied Optics and Photonics China: Optical Spectroscopy and Imaging, AOPC 2022

Conference date:December 18, 2022  -  December 19, 2022

Conference location:Virtual, Online, China

Conference code:186190

Sponsor:Chinese Society for Optical Engineering (CSOE)

Publisher:SPIE

Abstract:<div data-language="eng" data-ev-field="abstract">With the improvement of spatial resolution, the focal length of space cameras and spectral imagers become longer. The thermal stability of image stability is more sensitive, with the temperature, especially in VNIR (visible and near-infrared). To solve the thermal stability of R-C(Ritchey-Chr&eacute;tien) long focal length fore-Telescope system, the relevant factors are discussed, on the basis of the LASIS(Large Aperture Static Imaging Spectrometer), and the change in the spacing between primary mirror and secondary mirror with temperature is proposed. Base on the calculation in theory, the method of mechanical passive athermalization design is developed. Mechanical test results indicate that the first natural frequency is 195Hz, above the 100 Hz. The thermal experiments show that the stability of primary mirror and secondary mirror spacing is 0.5&mu;m-1, consisting with the FEA(Finite Element Analysis) value<br/></div> &copy; COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

Number of references:15

Main heading:Mirrors

Controlled terms:Finite element method - Image enhancement - Infrared devices - Structural optimization - System stability - Telescopes - Thermodynamic stability

Uncontrolled terms:Mechanical - Mechanical passive athermalization design - Optimal structures - Passive athermalization - Primary mirrors - Ritchey-chretien - Secondary mirror - Spatial resolution - Telescope system - Visible and near infrared

Classification code:641.1  Thermodynamics - 741.3  Optical Devices and Systems - 921.5  Optimization Techniques - 921.6  Numerical Methods - 961  Systems Science

Numerical data indexing:Frequency 1.00E+02Hz, Frequency 1.95E+02Hz, Size 5.00E-07m

DOI:10.1117/12.2651530

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 120>

 

Accession number:20231513877180

Title:Modeling 3D sliding electrical contact considering fully coupled thermal-mechanical-electrical effects

Authors:Sui, Yijin (1); Wang, Wenzhong (1); Zhang, Haibo (1); Xie, Youjin (2, 3) 

Author affiliation:(1) School of Mechanical Engineering, Beijing Institute of Technology, Beijing; 100081, China; (2) 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:Zhang, Haibo(haibozhang@bit.edu.cn)

Source title:Tribology International

Abbreviated source title:Tribol Int

Volume:184

Issue date:June 2023

Publication year:2023

Article number:108491

Language:English

ISSN:0301679X

CODEN:TRBIBK

Document type:Journal article (JA)

Publisher:Elsevier Ltd

Abstract:<div data-language="eng" data-ev-field="abstract">The 3D sliding electrical contact model considering thermal-mechanical-electrical coupling is presented in this paper. The semi-analytical method (SAM) is used to solve this complex multi-physical contact model. Firstly, the frequency response functions (FRFs) for thermal-mechanical-electrical fields are derived. Then, with discrete convolution and fast Fourier transform (DC-FFT) speeding calculation, a solving procedure, including the conjugate gradient method for force balance and algorithms for electrical potential equilibrium and heat flux partition, is proposed for the first time to solve the fully coupled electrical contact problem. Last, the effects of multiple loadings including the current, normal force, and sliding velocity on electrical contact behaviors are systematically investigated.<br/></div> &copy; 2023

Number of references:37

Main heading:Conjugate gradient method

Controlled terms:3D modeling - Electric contacts - Electric potential - Fast Fourier transforms - Frequency response - Heat flux

Uncontrolled terms:Constriction resistance - Contact modeling - Electric potential equilibrium - Electrical constriction resistance - Fully-coupled - Mechanical - Mechanical-Electrical coupling - Sliding electrical contacts - Thermal - Thermal-mechanical-electrical coupling

Classification code:641.2  Heat Transfer - 701.1  Electricity: Basic Concepts and Phenomena - 704.1  Electric Components - 723.2  Data Processing and Image Processing - 921  Mathematics - 921.3  Mathematical Transformations

DOI:10.1016/j.triboint.2023.108491

Funding details:  Number: U2141243, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: -, Sponsor: Beijing Institute of Technology Research Fund Program for Young Scholars;

Funding text:This work was supported by the National Natural Science Foundation of China ( U2141243 ) and Beijing Institute of Technology Research Fund Program for Young Scholars .

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 121>

 

Accession number:20230713574399

Title:Research on key technologies of hyperspectral imaging system for spaceborne water environment remote sensing monitoring

Authors:Song, Shuyao (1, 2); Liu, Xiao (1); Wang, Xueji (1); Liu, Yuyang (1, 2); Liu, Hong (1); Liu, Jiacheng (1); Yu, Tao (1) 

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

Corresponding author:Yu, Tao(yutao@opt.ac.cn)

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:12558

Part number:1 of 1

Issue title:AOPC 2022: Optical Spectroscopy and Imaging

Issue date:2023

Publication year:2023

Article number:125580D

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510662308

Document type:Conference article (CA)

Conference name:2022 Applied Optics and Photonics China: Optical Spectroscopy and Imaging, AOPC 2022

Conference date:December 18, 2022  -  December 19, 2022

Conference location:Virtual, Online, China

Conference code:186190

Sponsor:Chinese Society for Optical Engineering (CSOE)

Publisher:SPIE

Abstract:<div data-language="eng" data-ev-field="abstract">In order to realize space-based remote sensing for river, lake and ocean environment monitoring and break through the key technology of hyperspectral imaging system, based on the Ritchey-Chr&eacute;tien (R-C) Cassegrain folding reflector telescope, we designed a front telescope system with a working altitude of 600 km, a working spectral band of 450-900 nm, a full field of view of 2.9&deg;, a system focal length of 400 mm, the optical speed of F/4 and effective control of aberration and chromatic aberration of adding three-piece correction mirror to control the field of view is designed. The initial structural parameters of the front telescope system are solved according to the primary aberration theory, and the secondary mirror blocking ratio of the front telescope system is designed to be 0.35, and the simulation and optimization design are carried out in ZEMAX software. The system performance analysis shows that more than 80% of the energy of the imaging spot is concentrated within 12 &mu;m.The maximum aberration is 0.78% and the maximum magnification chromatic aberration is 1.26 &mu;m.The RMS (Rate-Monotonic Scheduling) radius of spot at all fields of view and wavelengths in the point column diagram is less than 2.6 &mu;m (Airy radius is 3.3 &mu;m). At the Nyquist frequency of 25 lp / mm, the MTF (Modulation Transfer Function) values of each spectral section in all fields of view are greater than 0.8.All the above evaluation indexes meet the performance requirements of hyperspectral imaging system<br/></div> &copy; COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

Number of references:11

Main heading:Aberrations

Controlled terms:Adaptive optics - Altitude control - Computer software - Hyperspectral imaging - Imaging systems - Mirrors - Optical remote sensing - Space optics - Telescopes

Uncontrolled terms:Cassegrain - Cassegrain. - Chromatic aberration - Field of views - Hyperspectral imaging systems - Key technologies - Remote sensing monitoring - Space-borne - Telescope system - Water environments

Classification code:656.1  Space Flight - 723  Computer Software, Data Handling and Applications - 731.3  Specific Variables Control - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 746  Imaging Techniques

Numerical data indexing:Percentage 7.80E-01%, Percentage 8.00E+01%, Size 1.20E-05m, Size 1.26E-06m, Size 2.60E-06m, Size 3.30E-06m, Size 4.00E-01m, Size 4.50E-07m to 9.00E-07m, Size 6.00E+05m

DOI:10.1117/12.2651498

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 122>

 

Accession number:20232114113546

Title:Design of three-class ultra-efficient stray light suppression baffle

Authors:Jin, Yu (1, 2); Lin, Shangmin (1, 2); Wang, Hu (1, 2); Qiao, Jiang (1, 2); Yan, Haoyu (1, 2); Wang, Xingyan (1, 2) 

Author affiliation:(1) University of Chinese Academy of Sciences, Beijing City; 100049, China; (2) Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Science, No. 17, Information Avenue, High-tech Zone, Shanxi Province, Xi'an City; 710119, China 

Corresponding author:Lin, Shangmin(lsm175@163.com)

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:12585

Part number:1 of 1

Issue title:International Conference on Precision Instruments and Optical Engineering, PIOE 2022

Issue date:2023

Publication year:2023

Article number:1258504

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510662902

Document type:Conference article (CA)

Conference name:2022 International Conference on Precision Instruments and Optical Engineering, PIOE 2022

Conference date:September 23, 2022  -  September 25, 2022

Conference location:Guangzhou, China

Conference code:187960

Sponsor:Guangdong Measurement and Control Technology and Equipment Application Promotion Association

Publisher:SPIE

Abstract:<div data-language="eng" data-ev-field="abstract">The ultra-efficient standard light baffle plays an important role in the calibration of the stray light test system. In this paper, a three-class baffle is designed. And a design scheme of the baffle with honeycombed wall is proposed, by analyzing the stray light transmission model and suppression mechanism, which can meet the requirements of a baffle with ultra-efficient stray light suppression capability. A simulation model of the baffle was established. The simulation of baffle show that when the stray light suppression angle is greater than 8&deg;, the PST value of the baffle reaches 10^-6 magnitude. When the stray light suppression angle is greater than 17&deg;, the PST value of the baffle reaches 10^-12 magnitude, which can meet the needs of ultra-efficient calibration of laboratory stray light test systems.<br/></div> &copy; 2023 SPIE.

Number of references:21

Main heading:Honeycomb structures

Controlled terms:Calibration - Light transmission - Optical instruments - Stray light

Uncontrolled terms:Design scheme - Model mechanisms - Simulation model - Stray light suppression - Suppression mechanism - Test systems - Three-class baffle - Transmission model - Transmission suppression - Ultra-efficient

Classification code:408.2  Structural Members and Shapes - 741.1  Light/Optics - 941.3  Optical Instruments

DOI:10.1117/12.2668091

Funding details:  Number: 2021YFC2203501, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;

Funding text:Fund project&#65306;National Key R&D Program of China (No. 2021YFC2203501)

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 123>

 

Accession number:20220711646734

Title:Improved structure for the dissipative soliton generation based on nonlinear polarization rotation effect

Authors:Ban, Xiaoqiang (1, 2); Li, Xiaohui (3); Zhong, Ming (4); Little, Brent E. (1, 2); Zhao, Wei (1, 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, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) School of Physics and Information Technology, Shaanxi Normal University, Xi'an, China; (4) School of Mathematics and Statistics, Shaanxi Normal University, Xi'an, China 

Corresponding author:Li, Xiaohui(lixiaohui0523@163.com)

Source title:Microwave and Optical Technology Letters

Abbreviated source title:Microwave Opt Technol Lett

Volume:65

Issue:5

Issue date:May 2023

Publication year:2023

Pages:1127-1132

Language:English

ISSN:08952477

E-ISSN:10982760

CODEN:MOTLEO

Document type:Journal article (JA)

Publisher:John Wiley and Sons Inc

Abstract:<div data-language="eng" data-ev-field="abstract">Nonlinear polarization rotation (NPR) technique has been studied for several decades to investigate the ultrafast pulse in both scientific and industrial fields. However, some drawbacks such as sensitive to the environment, noncompact, difficult to reach all the polarization states limit the real applications of this methods. In this work, an improved NPR technique, with polarizar-polarization controlar-polarizar structure, has been proposed for the first time. The new structure is relatively more simple to reach all the polarization states and remains much more stable states than traditional NPR technique. We proposed all-normal-dispersion Yb-doped fiber laser and rectangular-shaped spectrum is obtained both experimentally and theoretically by improved NPR technique. The achieved stable pulse duration and pulse period are 11.69 ps and 37.2 ns, respectively. Signal-to-noise ratio is 64 dB at 26.9&nbsp;MHz, thus the proposed fiber laser has very high stability. Besides, we investigate the output spectrum and pulse shape based on dispersive Fourier transformation, getting the right triangle and ordinary triangle spectrums that are symmetric with the corresponding pulse shapes.<br/></div> &copy; 2022 Wiley Periodicals LLC.

Number of references:31

Main heading:Fiber lasers

Controlled terms:Fourier transforms - Polarization - Signal to noise ratio - Solitons

Uncontrolled terms:All-normal dispersions - Dispersive fourier transformation - Dissipative solitons - Fourier transformations - Improved nonlinear polarization rotation technique - Nonlinear polarization rotation - Polarization state - Pulse-shape - Spectra's - Yb-doped fiber lasers

Classification code:716.1  Information Theory and Signal Processing - 744.4  Solid State Lasers - 921.3  Mathematical Transformations

Numerical data indexing:Decibel 6.40E+01dB, Frequency 2.69E+07Hz, Time 1.169E-11s, Time 3.72E-08s

DOI:10.1002/mop.33199

Funding details:  Number: 1110010717, Acronym: -, Sponsor: Shaanxi Normal University;

Funding text:The work is supported by Starting Grants of Shaanxi Normal University (Grant No. 1110010717).

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 124>

 

Accession number:20222812337743

Title:Various-order soliton molecule evolution in a fiber laser with nonlinear polarization rotation effect

Authors:Ban, Xiaoqiang (1, 2); Li, Xiaohui (3); Zhong, Ming (4); Little, Brent E. (1, 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, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) School of Physics and Information Technology, Shaanxi Normal University, Xi'an, China; (4) School of Mathematics and Statistics, Shaanxi Normal University, Xi'an, China 

Corresponding author:Li, Xiaohui(lixiaohui0523@163.com)

Source title:Microwave and Optical Technology Letters

Abbreviated source title:Microwave Opt Technol Lett

Volume:65

Issue:5

Issue date:May 2023

Publication year:2023

Pages:1285-1291

Language:English

ISSN:08952477

E-ISSN:10982760

CODEN:MOTLEO

Document type:Journal article (JA)

Publisher:John Wiley and Sons Inc

Abstract:<div data-language="eng" data-ev-field="abstract">The generation and evolution of soliton molecules are investigated theoretically with the coupled nonlinear Schrodinger equations&nbsp;based on a vector field. The formation of second-and third-order soliton molecules is investigated. Besides this, various-order soliton molecules from the 6th order to the 13th order have been observed by adjusting small-signal gain and phase delay. Finally, we analyze the reason for the soliton molecule generation. Exploring soliton molecules is helpful for optical communication as well as for fiber laser design.<br/></div> &copy; 2022 Wiley Periodicals LLC.

Number of references:27

Main heading:Fiber lasers

Controlled terms:Molecules - Nonlinear equations - Optical fiber communication - Polarization - Solitons

Uncontrolled terms:A.Fibres - Coupled nonlinear Schrodinger equation - Equation based - Nonlinear polarization rotation - Nonlinear polarization rotation effect - Phase delay - Rotation effect - Small signal gain - Soliton molecules - Various-order soliton molecule

Classification code:717.1  Optical Communication Systems - 744.4  Solid State Lasers - 931.3  Atomic and Molecular Physics

DOI:10.1002/mop.33406

Funding details:  Number: XDB24030300, Acronym: CAS, Sponsor: Chinese Academy of Sciences;

Funding text:This work was supported by a strategic pilot project (Class B) of the Chinese Academy of Sciences (Grant No. XDB24030300).

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 125>

 

Accession number:20232614306943

Title:Two-frame advanced iterative self-tuning algorithm for accurate phase retrieval

Authors:He, Zhouxuan (1); Du, Hubing (1); Gu, Feifei (4); Hu, Bingqing (1); Wang, Feng (2); Zhao, Zixin (3); Zhang, Gaopeng (2) 

Author affiliation:(1) School of Mechatronic Engineering, Xi'an Technological University, Shaanxi, Xi'an; 710032, China; (2) Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an; 710119, China; (3) State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Shaanxi, Xi'an; 710049, China; (4) Guangdong-Hong Kong-Macao Joint Laboratory of Human-Machine Intelligence Synergy Systems, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen; 518055, China 

Corresponding author:Du, Hubing(duhubing@xatu.edu.cn)

Source title:Optics and Lasers in Engineering

Abbreviated source title:Opt Lasers Eng

Volume:169

Issue date:October 2023

Publication year:2023

Article number:107715

Language:English

ISSN:01438166

CODEN:OLENDN

Document type:Journal article (JA)

Publisher:Elsevier Ltd

Abstract:<div data-language="eng" data-ev-field="abstract">Two-shot random phase-shifting interferometry has been actively investigated and improved owing to more demanding requirements in investigating dynamic phenomena or sensing some transient events. Given the background intensity and phase step knowledge, a reconstruction algorithm can be used to recover a complex-valued signal from intensity-only measurements. Most algorithms assume the background intensity and modulation amplitude in a frame of interferogram are constant variables; however, in realistic systems, they vary laterally and axially across the field of view. The model can be used but often appears less precise. In this work, we propose an approach that leverages the iterative method to cope with spatially varying background intensity and modulation amplitude. Our approach, termed the two-frame advanced iterative self-tuning algorithm, uses the spatial mean algorithm paired with an iterative procedure to search the phase step from two captured fringe patterns. It represents a novel approach to reliable and practical two-step phase-shifting interferometry without pre-filtering due to the cancelation of simultaneously obtaining the phase shifts and measured phase through iterative operation in the spatial&ndash;temporal domain. Experimental results obtained using the proposed method indicate that it is a simple and robust solution for phase extraction from a two-frame unknown phase shift fringe pattern with spatially varying background intensity and modulation amplitude.<br/></div> &copy; 2023 Elsevier Ltd

Number of references:26

Main heading:Interferometry

Controlled terms:Iterative methods - Tuning

Uncontrolled terms:Dynamic phenomena - Fringe pattern - Fringes analysis - Modulation amplitudes - Phase retrieval - Phase shifting Interferometry - Phase steps - Random-phase - Self-tuning algorithms - Varying background

Classification code:921.6  Numerical Methods - 941.4  Optical Variables Measurements

DOI:10.1016/j.optlaseng.2023.107715

Funding details:  Number: 2022410, Acronym: YIPA, Sponsor: Youth Innovation Promotion Association;Number: 51905529, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 51975448, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:National Natural Science Foundation of China (51975448, 51905529); Key R & D Plan of Shaanxi Province (2021GY-274); Youth Innovation Promotion Association, CAS (2022410); Shaanxi Province Youth Science and Technology New Star Project (2023KJXX-102).

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 126>

 

Accession number:20231714021605

Title:Generation of perfect vectorial vortex beams by employing coherent beam combining    (Open Access)

Authors:Ju, Pei (1, 2); Fan, Wenhui (1, 2, 3); Gao, Wei (1, 2); Li, Zhe (1, 2); Gao, Qi (1, 2); Li, Gang (1, 2); Jiang, Xiaoqiang (1, 2); Zhang, Tongyi (1, 2) 

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&rsquo;an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China 

Source title:Optics Express

Abbreviated source title:Opt. Express

Volume:31

Issue:7

Issue date:March 27, 2023

Publication year:2023

Pages:11885-11898

Language:English

E-ISSN:10944087

Document type:Journal article (JA)

Publisher:Optica Publishing Group (formerly OSA)

Abstract:<div data-language="eng" data-ev-field="abstract">Based on coherent beam combining, we propose a method for generating the perfect vectorial vortex beams (VVBs) with a specially designed radial phase-locked Gaussian laser array, which is composed of two discrete vortex arrays with right-handed (RH) and left-handed (LH) circularly polarized states and in turn adjacent to each other. The simulation results demonstrate that the VVBs with correct polarization order and topological Pancharatnam charge are successfully generated. The diameter and thickness of generated VVBs independent of the polarization orders and topological Pancharatnam charges further prove that the generated VVBs are perfect. Propagating in free space, the generated perfect VVBs can be stable for a certain distance, even with half-integer orbital angular momentum. In addition, constant phases &phi;0 between the RH and LH circularly polarized laser arrays has no effect on polarization order and topological Pancharatnam charge but makes polarization orientation to rotate &phi;<inf>0</inf>/2. Moreover, perfect VVBs with elliptically polarized states can be flexibly generated only by adjusting the intensity ratio between the RH and LH circularly polarized laser array, and such perfect VVBs are also stable on beam propagation. The proposed method could provide a valuable guidance for high power perfect VVBs in future applications.<br/></div> &copy; 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

Number of references:48

Main heading:Topology

Controlled terms:Circular polarization - Gaussian beams - Vortex flow

Uncontrolled terms:Circularly polarized lasers - Coherent beam combining - Gaussian lasers - Laser arrays - Lefthanded - Phase locked - Polarized state - Radial phase - Right handed - Vortex beams

Classification code:631.1  Fluid Flow, General - 701.1  Electricity: Basic Concepts and Phenomena - 711  Electromagnetic Waves - 921.4  Combinatorial Mathematics, Includes Graph Theory, Set Theory

DOI:10.1364/OE.485396

Funding details:  Number: 62005310,62171443, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XIOPMQCH2021003, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;Number: 2021GY-298, Acronym: -, Sponsor: Key Research and Development Projects of Shaanxi Province;

Funding text:Funding. Youth Innovation Promotion Association XIOPM-CAS (XIOPMQCH2021003); National Natural Science Foundation of China (62005310, 62171443); Key Research and Development Projects of Shaanxi Province (2021GY-298).

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

Open Access type(s): All Open Access, Gold

 

<RECORD 127>

 

Accession number:20232214155305

Title:Polarization control of terahertz waves generated by a femtosecond three-color pulse scheme

Authors:Wang, Hanqi (1, 2); Fan, Wenhui (1, 2, 3); Chen, Xu (1); Yan, Hui (1, 2) 

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&rsquo;an; 710119, China; (2) University of Chinese, Academy of Sciences, Beijing; 100049, China; (3) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China 

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

Source title:Journal of the Optical Society of America B: Optical Physics

Abbreviated source title:J Opt Soc Am B

Volume:40

Issue:6

Issue date:June 2023

Publication year:2023

Pages:1375-1383

Language:English

ISSN:07403224

E-ISSN:15208540

CODEN:JOBPDE

Document type:Journal article (JA)

Publisher:Optica Publishing Group (formerly OSA)

Abstract:<div data-language="eng" data-ev-field="abstract">Polarization characteristics of terahertz waves generated from a short air plasma excited by femtosecond three-color pulses with a frequency ratio of 1:2:3 have been theoretically investigated, and the results show that flexible and effective control of terahertz polarization can be achieved by means of changing the polarization combination and relative phase of three-color pulses, which is related to the electric field spatiotemporal distribution of the synthetic pulse formed via three-color pulse superposition. The complicated spatiotemporal distribution can be made clear by analyzing the projection component of the electric field in the three-dimensional Cartesian coordinate system. For terahertz waves generated from a short air plasma filament, the proposed method of terahertz polarization control on the basis of a three-color pulse scheme can be realized by ordinary multi-cycle laser pulses and overcome the disadvantage of few-cycle laser pulses utilized to obtain nearly circularly polarized intense terahertz waves or elliptically polarized intense terahertz waves with large ellipticity in the two-color pulse scheme.<br/></div> &copy; 2023 Optica Publishing Group.

Number of references:43

Main heading:Terahertz waves

Controlled terms:Color - Electric fields - Laser pulses - Polarization - Spatial distribution

Uncontrolled terms:Air plasmas - Cartesian coordinate system - Cartesian-coordinates system - Femtoseconds - Frequency ratios - Polarization characteristics - Polarization control - Relative phasis - Spatiotemporal distributions - Tera Hertz

Classification code:405.3  Surveying - 701.1  Electricity: Basic Concepts and Phenomena - 711  Electromagnetic Waves - 741.1  Light/Optics - 744.1  Lasers, General - 902.1  Engineering Graphics - 921  Mathematics

DOI:10.1364/JOSAB.484521

Funding details:  Number: LSIT201913N, Acronym: -, Sponsor: -;Number: 61675230,61905276, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020JQ-437, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;

Funding text:Funding. National Natural Science Foundation of China (61675230, 61905276); Natural Science Foundation of Shaanxi Province (2020JQ-437); Open Research Fund of Key Laboratory of Spectral Imaging Technology, Chinese Academy of Sciences (LSIT201913N).

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 128>

 

Accession number:20232114130171

Title:Remote Sensing Image Retrieval by Deep Attention Hashing with Distance-Adaptive Ranking    (Open Access)

Authors:Zhang, Yichao (1, 2); Zheng, Xiangtao (3); Lu, Xiaoqiang (3) 

Author affiliation:(1) Chinese Academy of Sciences, Key Laboratory of Spectral Imaging Technology, Xi'An Institute of Optics and Precision Mechanics, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Fuzhou University, College of Physics and Information Engineering, Fuzhou; 350002, China 

Corresponding author:Zheng, Xiangtao(xiangtaoz@gmail.com)

Source title:IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing

Abbreviated source title:IEEE J. Sel. Top. Appl. Earth Obs. Remote Sens.

Volume:16

Issue date:2023

Publication year:2023

Pages:4301-4311

Language:English

ISSN:19391404

E-ISSN:21511535

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:<div data-language="eng" data-ev-field="abstract">With the joint advancement of numerous related fields of remote sensing, the amount of remote sensing data is growing exponentially. As an essential remote sensing Big Data management technique, content-based remote sensing image retrieval has attracted more and more attention. A novel deep attention hashing with distance-adaptive ranking (DAH) is proposed for remote sensing image retrieval in this article. First, a channel-spatial joint attention mechanism is employed for feature extraction of remote sensing images to make the proposed DAH method focus more on the critical details of the remote sensing images and suppress irrelevant regional responses. Second, a novel balanced pairwise weighted loss function is proposed to enable discrete hash codes to participate in neural network training, which contains pairwise weighted similarity loss, classification loss, and quantization loss. The pairwise weighted similarity loss is designed to decrease the impact of the imbalance of positive and negative sample pairs. The classification loss and quantization loss are added to the loss function to decrease background interference and information loss during the quantization phase, respectively. Finally, a distance-adaptive ranking strategy with category-weighted Hamming distance is presented in the retrieval phase to utilize the category probability information fully. Experiments on benchmark datasets compared with state-of-the-art methods demonstrate the effectiveness of the proposed DAH method.<br/></div> &copy; 2008-2012 IEEE.

Number of references:50

Main heading:Feature extraction

Controlled terms:Big data - Classification (of information) - Deep learning - Extraction - Hamming distance - Hash functions - Image retrieval - Information management - Neural networks - Remote sensing  - Semantics

Uncontrolled terms:Adaptive rankings - Channel-spatial joint attention - Code - Deep hashing - Deep learning - Distance-adaptive ranking - Features extraction - Joint attention - Remote sensing image retrieval - Remote-sensing  - Spatial joint

Classification code:461.4  Ergonomics and Human Factors Engineering - 716.1  Information Theory and Signal Processing - 723.2  Data Processing and Image Processing - 802.3  Chemical Operations - 903.1  Information Sources and Analysis

DOI:10.1109/JSTARS.2023.3271303

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

Open Access type(s): All Open Access, Gold

 

<RECORD 129>

 

Accession number:20232114125062

Title:Classification of skin cancer based on hyperspectral microscopic imaging and machine learning    (Open Access)

Authors:Qi, Meijie (1, 2); Liu, Yujie (1); Li, Yanru (1); Liu, Lixin (1); Zhang, Zhoufeng (2) 

Author affiliation:(1) School of Optoelectronic Engineering, Xidian University, Xi&rsquo;an; 710071, China; (2) CAS Key Laboratory of Spectral Imaging Technology, Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China 

Corresponding author:Liu, Lixin(lxliu@xidian.edu.cn)

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:12601

Part number:1 of 1

Issue title:SPIE-CLP Conference on Advanced Photonics 2022

Issue date:2023

Publication year:2023

Article number:1260103

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510663282

Document type:Conference article (CA)

Conference name:SPIE-CLP Conference on Advanced Photonics 2022

Conference date:November 21, 2022  -  November 23, 2022

Conference location:Virtual, Online, China

Conference code:188033

Publisher:SPIE

Abstract:<div data-language="eng" data-ev-field="abstract">Hyperspectral microscopic imaging (HMI) technology is a non-contact optical diagnostic method, which combines hyperspectral imaging (HSI) technology with microscopy to provide both spectral information and image information of the samples to be measured. In this paper, basal cell carcinoma (BCC), squamous cell carcinoma (SCC) and malignant melanoma (MM) were classified based on synthetic RGB image data from HMI cube by using four classification methods extreme learning machine (ELM), support vector machine (SVM), decision tree and random forest (RF). The highest classification accuracy of 0.791&plusmn;0.060 and a KAPPA value of 0.685&plusmn;0.095 were obtained when color moment, gray level co-occurrence matrix (GLCM) and local binary pattern (LBP) were used for image feature extraction, feature dimensions were reduced by the PLS, the sample sets were divided by the hold-out method, and the tissues were classified by the SVM model.<br/></div> &copy; 2023 SPIE.

Number of references:11

Main heading:Decision trees

Controlled terms:Classification (of information) - Dermatology - Diseases - Hyperspectral imaging - Learning systems - Local binary pattern - Support vector machines

Uncontrolled terms:Cancer classification - Classifieds - HyperSpectral - Hyperspectral microscopic imaging - Imaging technology - Machine-learning - Microscopic imaging - Non-contact - Optical diagnostic methods - Skin cancers

Classification code:461.6  Medicine and Pharmacology - 716.1  Information Theory and Signal Processing - 723  Computer Software, Data Handling and Applications - 723.2  Data Processing and Image Processing - 746  Imaging Techniques - 903.1  Information Sources and Analysis - 921.4  Combinatorial Mathematics, Includes Graph Theory, Set Theory - 961  Systems Science

DOI:10.1117/12.2666425

Funding details:  Number: LSIT202005W, Acronym: -, Sponsor: -;

Funding text:This work was supported by the Technology (LSIT202005W).This work was supported by the 111 Project and Open Research Fund of CAS Key Laboratory of Spectral Imaging Technology (LSIT202005W).

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

Open Access type(s): All Open Access, Bronze

 

<RECORD 130>

 

Accession number:20231113742172

Title:Design and simulation of space-based photoelectric imaging stabilization control system    (Open Access)

Authors:Cheng, Zhiyuan (1, 2); Ji, Zhou (3); Su, Hua (4); Gao, Yansheng (3) 

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, China; (2) Cas Key Laboratory of Space Precision Measurement Technology, Xi'an; 710119, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) School of Physics and Information Technology, Shaanxi Normal University, Xi'an; 710119, China 

Corresponding author:Cheng, Zhiyuan(czy@opt.ac.cn)

Source title:ACM International Conference Proceeding Series

Abbreviated source title:ACM Int. Conf. Proc. Ser.

Part number:1 of 1

Issue title:Proceedings - 2023 7th International Conference on Control Engineering and Artificial Intelligence, CCEAI 2023

Issue date:January 28, 2023

Publication year:2023

Pages:96-101

Language:English

ISBN-13:9781450397513

Document type:Conference article (CA)

Conference name:7th International Conference on Control Engineering and Artificial Intelligence, CCEAI 2023

Conference date:January 28, 2023  -  January 30, 2023

Conference location:Sanya, China

Conference code:187085

Publisher:Association for Computing Machinery

Abstract:<div data-language="eng" data-ev-field="abstract">Space-based theodolite is an important technology in the field of space remote sensing imaging. The technology can be applied to space optical remote sensing, space astronomical observation, space laser communication and other technical fields. In order to suppress the influence of disturbance of moving satellite platform on the imaging stabilization accuracy and improve the stabilization accuracy of space-based theodolite, a photoelectric imaging stabilization method based on fiber optic gyroscope and Fast Steering Mirror(FSM) was proposed to compensate the disturbance of moving satellite platform. Firstly, fiber optic gyroscope was used to measure the micro-perturbation information of the moving satellite platform. Then the influence of the disturbance on the optical axis direction of the space-based theodolite was compensated by FSM. Finally, the method improved the stability accuracy of the space-based theodolite. A semi-physical simulation experiment platform for space-based photoelectric image stabilization was constructed, and the proposed image stabilization method of space-based theodolite and the space-based stabilization experiment platform was tested and verified. The research results show that the proposed space-based stabilization method can effectively improve the stabilization accuracy of the space-based photoelectric system. The novel stabilization method and space-based stabilization platform can provide effective technical support for the design and development of space high-precision photoelectric stabilization system.<br/></div> &copy; 2023 Owner/Author.

Number of references:13

Main heading:Fiber optics

Controlled terms:Gyroscopes - Optical communication - Optical remote sensing - Photoelectricity - Satellites - Simulation platform - Stabilization

Uncontrolled terms:Disturbance of moving satellite platform - Experiment platforms - Fast-steering mirrors - Fibre optics gyroscopes - Imaging stabilization - Photoelectrics - Satellite platforms - Space-based - Space-based the odolite - Stabilization methods

Classification code:655.2  Satellites - 701.1  Electricity: Basic Concepts and Phenomena - 717.1  Optical Communication Systems - 723.5  Computer Applications - 741.1  Light/Optics - 741.1.2  Fiber Optics - 741.3  Optical Devices and Systems

DOI:10.1145/3580219.3580237

Funding details:  Number: CXJJ-21S042, Acronym: -, Sponsor: -;Number: 61875257, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:&lowast;This research was supported by the National Natural Science Foundation of China (Grant No 61875257) This work is licensed under a Creative Commons Attribution-NonCommercial International 4.0 License.This research was supported by the National Natural Science Foundation of China and Grant No 61875257. The work was also supported by the Open Research Fund of CAS Key Laboratory of Space Precision Measurement Technology and Grant No CXJJ-21S042.

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

Open Access type(s): All Open Access, Bronze

 

<RECORD 131>

 

Accession number:20230613543063

Title:Precision Improvement of Underwater Single Photon Imaging Based on Model Matching

Authors:Zhang, Zhenyang (1, 2); Chen, Songmao (2, 3); Wang, Jie (1, 2); Ma, Caiwen (2, 4); Su, Xiuqin (1, 2) 

Author affiliation:(1) University of Chinese Academy of Sciences, Beijing; 100049, China; (2) Pilot National Laboratory for Marine Science and Technology, Qingdao; 266200, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Key Laboratory of Space Precision Measurement Technology, Xi'an; 710119, China; (4) Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics, Xi'an; 710119, China 

Corresponding author:Ma, Caiwen(cwma@opt.ac.cn)

Source title:IEEE Photonics Technology Letters

Abbreviated source title:IEEE Photonics Technol Lett

Volume:35

Issue:5

Issue date:March 1, 2023

Publication year:2023

Pages:253-256

Language:English

ISSN:10411135

E-ISSN:19410174

CODEN:IPTLEL

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:<div data-language="eng" data-ev-field="abstract">In this letter, the Gaussian With Exponential Components (GWEC) model is proposed to simulate the Instrument Response Function (IRF) by the convolution of the conventional Gaussian and exponential models, which aims to solve the issue that the system failed to obtain IRF accurately, resulting in poor accuracy of the cross-correlation results. Meanwhile, the GWEC model takes the advantage of simplicity in parameter setting and high range accuracy after cross-correlation operation.<br/></div> &copy; 1989-2012 IEEE.

Number of references:18

Main heading:Probability density function

Controlled terms:Particle beams - Photonics - Photons - Underwater imaging

Uncontrolled terms:Component modeling - Cross-correlations - Exponential components - Fitting - Gaussian with exponential component - Gaussians - Instrument response functions - Precision improvement - Single-photon imaging - Underwater

Classification code:741.1  Light/Optics - 741.3  Optical Devices and Systems - 746  Imaging Techniques - 922.1  Probability Theory - 931.3  Atomic and Molecular Physics - 932.1  High Energy Physics

DOI:10.1109/LPT.2023.3238079

Funding details:  Number: 2020M683600, Acronym: -, Sponsor: China Postdoctoral Science Foundation;

Funding text:This work was supported by the China Postdoctoral Science Foundation under Grant 2020M683600.

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 132>

 

Accession number:20224513072238

Title:Visual attention-based siamese CNN with SoftmaxFocal loss for laser-induced damage change detection of optical elements

Authors:Kou, Jingwei (1, 2); Zhan, Tao (3); Zhou, Deyun (1); Xie, Yu (4); Da, Zhengshang (2); Gong, Maoguo (5) 

Author affiliation:(1) School of Electronics and Information, Northwestern Polytechnical University, Xi'an; 710072, China; (2) The Advanced Optical Instrument Research Department, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) College of Information Engineering, Northwest A& F University, Xi'an; 712100, China; (4) School of Computer and Information Technology, Shanxi University, Taiyuan; 030006, China; (5) Key Laboratory of Intelligent Perception and Image Understanding of Ministry of Education, Xidian University, Xi'an; 710071, China 

Corresponding author:Zhou, Deyun(dyzhounpu@nwpu.edu.cn)

Source title:Neurocomputing

Abbreviated source title:Neurocomputing

Volume:517

Issue date:January 14, 2023

Publication year:2023

Pages:173-187

Language:English

ISSN:09252312

E-ISSN:18728286

CODEN:NRCGEO

Document type:Journal article (JA)

Publisher:Elsevier B.V.

Abstract:<div data-language="eng" data-ev-field="abstract">With high-energy laser irradiating, the laser-induced damages may occur in the surfaces of optical elements in laser facilities. As the laser-induced damage changes can badly affect regular and healthy operation of laser facilities, it is essential to effectively detect real damage changes while suppressing meaningless and spurious changes in captured optical images. In order to achieve high-precision laser-induced damage change detection, this paper presents a novel deep learning model which exploits visual attention-based siamese convolutional neural network with SoftmaxFocal loss and significantly improves the performance of damage change detection. In the proposed model, an end-to-end classification network is designed and trained which fuses the spatial-channel domain collaborative attention modules into siamese convolutional neural network thus achieving more efficient feature extraction and representation. For the purpose of addressing the unbalanced distribution of hard and easy samples, a novel loss function which is termed as SoftmaxFocal loss is put forward to train the proposed network. The SoftmaxFocal loss creatively introduces an additive focusing term into original softmax loss which greatly enhances the online hard sample mining ability of the proposed model. Experiments conducted on three real datasets demonstrate the validity and superiority of the proposed model.<br/></div> &copy; 2022 Elsevier B.V.

Number of references:47

Main heading:Convolution

Controlled terms:Behavioral research - Change detection - Convolutional neural networks - Damage detection - Deep learning - Geometrical optics - Laser damage

Uncontrolled terms:Change detection - Convolutional neural network - High-energy lasers - Laser facilities - Laser irradiating - Laser-induced damage - Siamese convolutional neural network - Softmaxfocal loss - Visual Attention - Visual attention mechanisms

Classification code:461.4  Ergonomics and Human Factors Engineering - 716.1  Information Theory and Signal Processing - 741.1  Light/Optics - 744.8  Laser Beam Interactions - 971  Social Sciences

DOI:10.1016/j.neucom.2022.10.074

Funding details:  Number: 62103311, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: MOE, Sponsor: Ministry of Education of the People's Republic of China;

Funding text:This work was supported by the National Natural Science Foundation of China under Grant 62103311.Maoguo Gong received the B.S. degree (Hons.) in electronic engineering and the Ph.D. degree in electronic science and technology from Xidian University, Xi&rsquo;an, China, in 2003 and 2009, respectively. Since 2006, he has been a Teacher with Xidian University. In 2008 and 2010, he was promoted as an Associate Professor and a Full Professor, respectively, both with exceptive admission. His current research interest includes computational intelligence with applications to optimization, learning, data mining, and image understanding. Dr. Gong was a recipient of the prestigious National Program for the support of Top-Notch Young Professionals from the Central Organization Department of China, the Excellent Young Scientist Foundation from the National Natural Science Foundation of China, and the New Century Excellent Talent in University from the Ministry of Education of China. He is an Associate Editor of the IEEE TRANSACTIONS ON EVOLUTIONARY COMPUTATION and the IEEE TRANSACTIONS ON NEURAL NETWORKS AND LEARNING SYSTEMS.

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 133>

 

Accession number:20225113272435

Title:Modeling and analysis of fast steering mirror disturbance effects on the line of sight jitter for precision pointing and tracking system

Authors:Lv, Tao (1, 2, 3, 4); Ruan, Ping (2, 3); Jiang, Kai (2, 3); Jing, Feng (2, 3) 

Author affiliation:(1) University of Chinese Academy of Sciences, Beijing; 100049, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) Key Laboratory of Space Precision Measurement Technology, Chinese Academy of Sciences, Xi'an; 710119, China; (4) Youth Innovation Promotion Association, Chinese Academy of Sciences, Beijing; 100029, China 

Corresponding author:Ruan, Ping(ruanp@opt.ac.cn)

Source title:Mechanical Systems and Signal Processing

Abbreviated source title:Mech Syst Signal Process

Volume:188

Issue date:April 1, 2023

Publication year:2023

Article number:110002

Language:English

ISSN:08883270

E-ISSN:10961216

CODEN:MSSPEP

Document type:Journal article (JA)

Publisher:Academic Press

Abstract:<div data-language="eng" data-ev-field="abstract">Fast steering mirrors (FSMs) are typically applied for beam stabilization for precision pointing and tracking systems (PPTSs) owing to their high-bandwidth, high-resolution, and high accuracy. In addition to the advantages, the presence of the residual momentum which caused by FSMs&rsquo; operation usually has noticeable effects on the stabilization of the line of sight (LOS) for PPTSs. Hence, it is necessary and momentous to estimate the effects of these disturbances to give insight into the FSM specification and the PPTS structural performance. However, the characteristic of multidisciplinary coupling makes it a challenge to measure the LOS jitter caused by FSMs. We approach this problem by establishing an integrated model for estimating the LOS jitter. A dynamic model of an FSM is firstly built to value the unbalanced momentum generated from its motion. Then a finite element model for the structure of the tracking system is established to predict the dynamic response excited by the disturbances from the FSM. In addition, with a linear optical model, the system optical performance under the FSM's disturbances is determined. Finally, a test is conducted to verify the validity of the model and the analysis. This paper focuses on estimating the disturbances effects of the FSM on the LOS jitter for a PPTS, and providing potential approaches for reducing these effects.<br/></div> &copy; 2022 Elsevier Ltd

Number of references:42

Main heading:Jitter

Controlled terms:Mirrors - Stabilization - Tracking (position)

Uncontrolled terms:Beam stabilizations - Disturbance effects - Fast-steering mirrors - Integrated modeling - Line of Sight - Line of sight jitter - Lines-of-sight - Pointing and tracking system - Precision pointing - Precision tracking

Classification code:741.3  Optical Devices and Systems

DOI:10.1016/j.ymssp.2022.110002

Funding details:  Number: -, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;

Funding text:This work is supported by the Key Laboratory of Space Precision Measurement Technology, Chinese Academy of Sciences (NO. 29J21-063-III), and the Youth Innovation Promotion Association, Chinese Academy of Sciences. The authors thank Yongming Qiao, Wen Liu and Rui Wang for their significant work during the experiment.

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 134>

 

Accession number:20230613537564

Title:Optimization of the quality control parameters in sapphire single crystal preparation using the Kyropoulos method

Authors:Xu, Jia (1); Qiao, Tiezhu (1, 2); Dong, Huijie (2); Zhang, Haifeng (3); Yan, Gaowei (4) 

Author affiliation:(1) Key Laboratory of Advanced Transducers and Intelligent Control System, Ministry of Education, Taiyuan University of Technology, Taiyuan; 030024, China; (2) College of Optoelectronics, Taiyuan University of Technology, Taiyuan; 030024, China; (3) Xi'an Institute of Optics and Precision Mechanics of CAS, Shanxi, Xi'an; 710119, China; (4) College of Electrical and Power Engineering, Taiyuan University of Technology, Taiyuan; 030024, China 

Corresponding author:Qiao, Tiezhu(qiaotiezhu@tyut.edu.cn)

Source title:CrystEngComm

Abbreviated source title:Crystengcomm

Volume:25

Issue:7

Issue date:January 25, 2023

Publication year:2023

Pages:1136-1145

Language:English

E-ISSN:14668033

CODEN:CRECF4

Document type:Journal article (JA)

Publisher:Royal Society of Chemistry

Abstract:<div data-language="eng" data-ev-field="abstract">The production of sapphire single crystals with high quality and low cost is an important goal of the sapphire industry. The quality of seeding has a direct impact on the final growth quality of sapphire crystals when sapphire is prepared using the Kyropoulos method. Keeping the crystal/melt contact stable is essential for lowering the number of seeding defects. In order to reduce the preparation cost of sapphire, an optimization strategy integrating computational fluid dynamics, artificial neural networks, and genetic algorithm is proposed to optimize the growth parameters of crystal seeding. The optimization goals are to stabilize the crystal/melt growth interface and increase seeding effectiveness. Three growth parameters, namely, melt temperature, seed crystal rotation speed and pulling speed, are selected as optimization variables. The samples produced by numerical calculation are combined with the actual production data to train and test the neural networks. The genetic algorithm is coupled with artificial neural networks to solve the multi-objective conflict between improving seeding efficiency and reducing the formation of crystal defects in the seeding process. The influence of the mechanism of different combinations of seeding parameters on seeding quality is discussed, and the optimization of seeding growth process is realized. The results show that the optimized combination of parameters gained in this study can improve the seeding speed and ensure the stability of the solid-liquid interface. This work is helpful to reduce the formation of seeding defects, improve the seeding quality, and shorten the seeding time.<br/></div> &copy; 2023 The Royal Society of Chemistry

Number of references:23

Main heading:Sapphire

Controlled terms:Computational fluid dynamics - Costs - Crystal orientation - Genetic algorithms - Molecular dynamics - Phase interfaces

Uncontrolled terms:Control parameters - Crystal melt - Crystal preparation - Growth parameters - High quality - High-low - Kyropoulos methods - Optimisations - Sapphire single crystal - Seeding qualities

Classification code:482.2.1  Gems - 723.5  Computer Applications - 801.4  Physical Chemistry - 911  Cost and Value Engineering; Industrial Economics - 931.1  Mechanics - 933.1.1  Crystal Lattice

DOI:10.1039/d2ce01675c

Funding details:  Number: 61973226, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021ZD0004, Acronym: -, Sponsor: Science and Technology Major Project of Inner Mongolia;

Funding text:This research was supported by the National Natural Science Foundation of China (Grant No. 61973226) and the Inner Mongolia Science and Technology Major Project (Grant No. 2021ZD0004).

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 135>

 

Accession number:20231914078637

Title:Harvey-Shack theory for a converging-diverging Gaussian beam    (Open Access)

Authors:Ma, Zhanpeng (1, 2, 3, 4); Hansen, Poul-Erik (3); Wang, Hu (1, 2); Karamehmedovi&#263;, Mirza (4); Chen, Qinfang (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) Danish Fundamental Metrology A/S, H&oslash;rsholm; DK-2970, Denmark; (4) Department of Applied Mathematics and Computer Science, Technical University of Denmark, Kgs. Lyngby; DK-2800, Denmark 

Corresponding author:Hansen, Poul-Erik(peh@dfm.dk)

Source title:Journal of the Optical Society of America B: Optical Physics

Abbreviated source title:J Opt Soc Am B

Volume:40

Issue:5

Issue date:May 2023

Publication year:2023

Pages:1162-1169

Language:English

ISSN:07403224

E-ISSN:15208540

CODEN:JOBPDE

Document type:Journal article (JA)

Publisher:Optica Publishing Group (formerly OSA)

Abstract:<div data-language="eng" data-ev-field="abstract">The scattering characteristics of random rough surfaces illuminated with a 3D converging-diverging Gaussian beam are investigated by applying the conventional Harvey-Shack theory in conjunction with 2D plane-wave decomposition. The Gaussian beam is assumed to have an arbitrary angle of incidence and to be linearly s-polarized. Using data obtained from laser BRDF measurements on isotropic random rough surfaces with low surface roughness, we demonstrate that the Gaussian beam Harvey-Shack theory is in better accordance with the experimental data than the conventional Harvey-Shack theory. The two models become identical for a large beam waist radii but are significantly different for smaller ones.<br/></div> &copy; 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

Number of references:34

Main heading:Gaussian beams

Controlled terms:Gaussian distribution - Laser theory - Surface measurement - Surface roughness

Uncontrolled terms:Angle of Incidence - Arbitrary angles - Beam waist radius - Isotropics - Low surface roughness - Plane-wave decomposition - Random rough surfaces - S-polarized - Scattering char-acteristics

Classification code:711  Electromagnetic Waves - 744.1  Lasers, General - 922.1  Probability Theory - 922.2  Mathematical Statistics - 931.2  Physical Properties of Gases, Liquids and Solids - 943.2  Mechanical Variables Measurements

DOI:10.1364/JOSAB.478801

Funding details:  Number: JRP 18SIB03, Acronym: -, Sponsor: -;Number: 25893, Acronym: -, Sponsor: Villum Fonden;Number: -, Acronym: -, Sponsor: Danish Agency for Science and Higher Education;Number: 202104910354, Acronym: CSC, Sponsor: China Scholarship Council;Number: 2021YFC2202100,2021YFC2202104, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;

Funding text:Acknowledgment. Author Z. Ma thanks Dr. T. Jiang for useful discussions. P-E. Hansen was also supported by the Danish Agency for Institutions and Education. Z. Ma was supported by China Scholarship Council and National Key Research and Development Program of China. M. Karamehmedovi&#263; was supported by The Villum Foundation.Funding. European Metrology Programme for Innovation and Research (20IND07, BxDiff, JRP 18SIB03, TracOptic); Danish Agency for Science and Higher Education; China Scholarship Council (CSC) (202104910354); National Key Research and Development Program of China (2021YFC2202100, 2021YFC2202104); Villum Fonden (25893).

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

Open Access type(s): All Open Access, Green

 

<RECORD 136>

 

Accession number:20232114124188

Title:Numerical simulation of dual MCP hard x-ray imaging detector on spatial resolution and detection quantum efficiency

Authors:Liu, Yiheng (1, 2, 3); Li, Lili (1, 2, 3); Chen, Ping (1, 3); Zhang, Feng (4); Gou, Yongsheng (1); He, Kai (1); Tian, Jinshou (1, 3) 

Author affiliation:(1) Key Laboratory of Ultra-fast photoelectric Diagnostics Technology, 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) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China; (4) China Academy of Engineering Physics, Mianyang; 621900, China 

Corresponding authors:Chen, Ping(chenping1@opt.ac.cn); Tian, Jinshou(tianjs@opt.cn)

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:12595

Part number:1 of 1

Issue title:Advanced Fiber Laser Conference, AFL 2022

Issue date:2023

Publication year:2023

Article number:125950D

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510663145

Document type:Conference article (CA)

Conference name:2022 Advanced Fiber Laser Conference, AFL 2022

Conference date:November 11, 2022  -  November 13, 2022

Conference location:Changsha, China

Conference code:187972

Sponsor:The Chinese Society for Optical Engineering

Publisher:SPIE

Abstract:<div data-language="eng" data-ev-field="abstract">Compton radiography is an important diagnostic tool for inertial confinement fusion (ICF), which provides important parameters about integrity, symmetry and &rho;R areal density of the dense cold fuel surrounding the hot spot. The dual MCPs (micro-channel plate) configuration detector as a key component for Compton radiography has the ability to detect hard x-rays at energies from 40 to 200 keV with higher detective quantum efficiency (DQE). In this work, a set of simulation methods for calculating the DQE and spatial resolution of dual MCPs are proposed. The photoelectric conversion and secondary electron multiplication processes of 59 KeV X-rays in double MCPs were simulated. The first piece of MCP with 51% lead content absorb x-rays volumetrically to improve the DQE and the second piece of MCP provides a large gain to multiply the secondary electrons. The simulation results indicate that the spatial resolution of the dual MCP detector is 186 &mu;m, and the DQE can reach 6.2%, which will ensure the dual MCP-based framing cameras can obtain imploded capsule images with higher signal-to-noise ratio and spatial resolution. The influence of MCP parameters on DQE and spatial resolution was analyzed, and the simulation method will provide an important reference for further optimization of the detector.<br/></div> &copy; 2023 SPIE.

Number of references:13

Main heading:Quantum efficiency

Controlled terms:Cameras - Conversion efficiency - Image resolution - Inertial confinement fusion - Photoelectricity - Secondary emission - Signal to noise ratio - X ray detectors - X ray radiography

Uncontrolled terms:COMPTON - Compton radiography - Detection quantum efficiencies - Detective quantum efficiency - Hard x-ray imaging - Micro channel plate - Secondary electrons - Spatial resolution - X-ray framing camera - X-ray imaging detector

Classification code:525.5  Energy Conversion Issues - 701.1  Electricity: Basic Concepts and Phenomena - 716.1  Information Theory and Signal Processing - 741.1  Light/Optics - 742.2  Photographic Equipment - 931.4  Quantum Theory; Quantum Mechanics - 932.2.1  Fission and Fusion Reactions

Numerical data indexing:Electron volt 4.00E+04eV to 2.00E+05eV, Percentage 5.10E+01%, Percentage 6.20E+00%, Size 1.86E-04m

DOI:10.1117/12.2666993

Funding details:  Number: 12075311,52175433, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: GJJSTD20220006,XAB2020YN10,XDA25030900,XDA25031100, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2021402, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;

Funding text:The work is supported by National Natural Science Foundation of China (Grants No. 12075311 and No. 52175433), the Youth Innovation Promotion Association CAS (Grant No. 2021402), Strategic Priority Research Program of Chinese Academy of Sciences (Grants No. XDA25030900 and No. XDA25031100), the CAS "Light of West China" Program (Grant No. XAB2020YN10) and the Scientific Instrument Developing Project of the Chinese Academy of Sciences (Grant No. GJJSTD20220006).

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 137>

 

Accession number:20230133034

Title:Study of Sub-Pixel Gray Degree Reconstruction Method for Simulation of Faint Star Element Target Position

Authors:Wu, Linghao (1); Wang, Jiaan (1); Jia, Wentao (2); Zhang, Jian (3); Sun, Jingrui (3) 

Author affiliation:(1) Department of Measurement and Control Technology and Instrumentation, Changzhou Institute of Technology, Changzhou; 213032, China; (2) Key Laboratory of Space Precision Measurement Technology, Chinese Academy of Sciences, Xian; 710119, China; (3) State Key Laboratory of Optoelectronic Measurement, Control and Optical Information Transmission, Changchun University of Science and Technology, Changchun; 130022, China 

Corresponding authors:Wu, Linghao(101222670@czu.cn); Sun, Jingrui(101222670@czu.cn)

Source title:SSRN

Issue date:April 19, 2023

Publication year:2023

Language:English

ISSN:15565068

Document type:Preprint (PP)

Publisher:SSRN

Abstract:<div data-language="eng" data-ev-field="abstract">The simulation accuracy of the faint star element target (FSET) position is a key factor that affects the accuracy of the precision test of the star sensor. In order to solve the problem that the position accuracy of FSET is restricted by the size of its component elements, the mathematical representation of FSET position correction and the grayscale distribution of the component elements is derived, and the Gaussian radius and grayscale energy coefficient model of FSET is established. According to the measured distribution results of the position error of the full-field FSET, the gray distribution of the basic element is reconstructed by reconstructing each correction set to simulate FSET, and the correction accuracy of the sub-pixel level FSET position is realized. The experimental results show that, compared with the existing correction methods, the position accuracy of FSET is improved by 1.64 times after subpixel gray reconstruction.<br/></div> &copy; 2023, The Authors. All rights reserved.

Number of references:18

Main heading:Pixels

Controlled terms:Stars

Uncontrolled terms:Component elements - Faint stars - Gray reconstruction of weak star target - Position accuracy - Simulation tests - Star sensors - Star simulator - Sub-pixels - Target position - The spacecraft ground simulation test calibration device

Classification code:657.2  Extraterrestrial Physics and Stellar Phenomena

DOI:10.2139/ssrn.4423797

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.Preprint ID:4423797

Preprint source website:https://papers.ssrn.com/sol3/papers.cfm

Preprint ID type:SSRN

 

 

<RECORD 138>

 

Accession number:20230713587717

Title:Evaluation of grinding characteristics for sapphire ultra-precision grinding using small grit sizes wheels based on AE signals

Authors:Wang, Sheng (1); Sun, Guoyan (2, 3); Zhao, Qingliang (1); Yang, Xiaodong (4) 

Author affiliation:(1) Center for Precision Engineering, School of Mechatronics Engineering, Harbin Institute of Technology, Harbin; 150001, China; (2) College of Artificial Intelligence, National University of Defense Technology, Changsha; 410073, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (4) Department of Mechanical Engineering and Automation, Harbin Institute of Technology, Harbin; 150001, China 

Corresponding author:Zhao, Qingliang(zhaoqingliang@hit.edu.cn)

Source title:Journal of Manufacturing Processes

Abbreviated source title:J. Manuf. Processes

Volume:90

Issue date:March 24, 2023

Publication year:2023

Pages:94-110

Language:English

ISSN:15266125

Document type:Journal article (JA)

Publisher:Elsevier Ltd

Abstract:<div data-language="eng" data-ev-field="abstract">This paper focused on the grinding characteristics for sapphire ultra-precision grinding with small grit size grinding wheels and acoustic emission signal monitoring of material removal mechanism under the action of multiple abrasive grain. The results show that the use of small grit size grinding wheels allowed for effective removal of sapphire and they facilitated the production of ductile surfaces at the correct parameters. The grinding depth was the most significant effect on the grinding characteristics, the grinding force and subsurface damage scale increased with the grinding depth, and the grinding surface morphology developed from ductile surface to low damage ductile surface and brittle fracture surface. The material removal behavior can be monitored with acoustic emission signals, the original signal, frequency domain and wavelet decomposition features were distinct attributed to the different material removal modes. Besides, low-scale subsurface damage also occurred at the parameters of small size grits and minimal grinding depth.<br/></div> &copy; 2023 The Society of Manufacturing Engineers

Number of references:53

Main heading:Grinding (machining)

Controlled terms:Acoustic emission testing - Brittle fracture - Ductile fracture - Frequency domain analysis - Sapphire - Surface morphology - Topography - Wavelet decomposition - Wheels

Uncontrolled terms:Acoustic emission signal - Acoustic-emissions - AE signals - Ductile brittle transition - Grinding characteristics - Grit size - Material removal mechanisms - Signal monitoring - Sub-surface damage - Ultraprecision grinding

Classification code:482.2.1  Gems - 601.2  Machine Components - 604.2  Machining Operations - 751.2  Acoustic Properties of Materials - 921.3  Mathematical Transformations - 951  Materials Science

DOI:10.1016/j.jmapro.2023.02.009

Funding details:  Number: 52105493, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XAB2019B24, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 4139ZRY4, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: 2018YFA0703400, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;

Funding text:The authors are appreciative of the support from the National Key Research and Development Program of China [ 2018YFA0703400 ], National Natural Science Foundation of China (NSFC) [ 52105493 ], the CAS Light of West China Program [ XAB2019B24 ], and the China Postdoctoral Science Foundation [ 4139ZRY4 ].

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 139>

 

Accession number:20230613555334

Title:Monitoring of ductile&ndash;brittle transition mechanisms in sapphire ultra-precision grinding used small grit size grinding wheel through force and acoustic emission signals

Authors:Wang, Sheng (1); Sun, Guoyan (2, 3); Zhao, Qingliang (1); Yang, Xiaodong (4) 

Author affiliation:(1) Center for Precision Engineering, School of Mechatronics Engineering, Harbin Institute of Technology, Harbin; 150001, China; (2) College of Artificial Intelligence, National University of Defense Technology, Changsha; 410073, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (4) Department of Mechanical Engineering and Automation, Harbin Institute of Technology, Harbin; 150001, China 

Corresponding author:Zhao, Qingliang(zhaoqingliang@hit.edu.cn)

Source title:Measurement: Journal of the International Measurement Confederation

Abbreviated source title:Meas J Int Meas Confed

Volume:210

Issue date:March 31, 2023

Publication year:2023

Article number:112557

Language:English

ISSN:02632241

CODEN:MSRMDA

Document type:Journal article (JA)

Publisher:Elsevier B.V.

Abstract:<div data-language="eng" data-ev-field="abstract">Progressive ultra-precision grinding experiments used small grit size grinding wheels were performed to investigate the ductile&ndash;brittle transition process of sapphire, force and AE signals were employed to monitor the material removal behavior. Precision dressing and measurement of circular arc grinding wheels were performed to meet the minimum grinding depth for ultra-precision grinding. A grinding force model was proposed to interpret the grinding forces in different materials removal modes. A continuous complete ductile&ndash;brittle transition process was observed and monitored, the progressive grinding was divided into three stages: ductile dominant, ductile&ndash;brittle transition and brittle eruption. The grinding force, surface profile, micro morphology and brittle fracture percentage were discussed. Brittle fracture will not entirely occur, but rather brittle fracture and ductile grooves were coexisted on the surface in the brittle eruption stage, which was attributed to the grinding characteristics of small grit wheels. In addition, raw AE signals and multiple transformation forms were utilized to monitor the material removal behavior and their respective roles were analyzed. The Fourier transform, discrete wavelet, continuous wavelet and wavelet coefficients in different stages can all establish a mapping relationship with material removal modes.<br/></div> &copy; 2023

Number of references:45

Main heading:Brittle fracture

Controlled terms:Acoustic emission testing - Ductile fracture - Fourier series - Grinding (machining) - Grinding wheels - Morphology - Sapphire

Uncontrolled terms:Acoustic-emissions - AE signals - Ductile brittle transition - Grinding force - Grit size - Material removal behaviours - Material removal mode - Online monitoring - Transition process - Ultraprecision grinding

Classification code:482.2.1  Gems - 604.2  Machining Operations - 751.2  Acoustic Properties of Materials - 921.3  Mathematical Transformations - 931.2  Physical Properties of Gases, Liquids and Solids - 951  Materials Science

DOI:10.1016/j.measurement.2023.112557

Funding details:  Number: 52105493, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XAB2019B24, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 4139ZRY4, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: 2018YFA0703400, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;

Funding text:The authors wish to acknowledge the support of the National Key Research and Development Program of China [2018YFA0703400], the National Natural Science Foundation of China (NSFC) [52105493], the CAS Light of West China Program [XAB2019B24], and the China Postdoctoral Science Foundation [4139ZRY4].

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 140>

 

Accession number:20231714005636

Title:Optical design and fabrication of a common-aperture multispectral imaging system for integrated deep space navigation and detection

Authors:Cao, Jiajing (1); Chang, Jun (1); Huang, Yi (1); Wu, Yunan (1); Ji, Zhongye (1); Lai, Xiaoxiao (1); Wang, Junya (1); Li, Yiting (1); Zhu, Weihong (2); Li, Xuyang (3) 

Author affiliation:(1) Key Laboratory of Photoelectronic Imaging Technology and System of Ministry of Education of China, School of Optics and Photonics, Beijing Institute of Technology, Beijing; 100081, China; (2) Institute of Spacecraft System Engineering, Beijing; 100094, China; (3) Space Optics Lab, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China 

Corresponding author:Chang, Jun(optics_chang@126.com)

Source title:Optics and Lasers in Engineering

Abbreviated source title:Opt Lasers Eng

Volume:167

Issue date:August 2023

Publication year:2023

Article number:107619

Language:English

ISSN:01438166

CODEN:OLENDN

Document type:Journal article (JA)

Publisher:Elsevier Ltd

Abstract:<div data-language="eng" data-ev-field="abstract">Multispectral imaging systems enable the simultaneous acquisition of spatial and multispectral information about a target, thereby improving the capability of all-weather autonomous spacecraft operations for sensing measurements and condition identification. This paper reports designing and constructing a common-aperture multispectral imaging system (CAMIS) that can simultaneously obtain ultraviolet, visible, mid-wave, and long-wave infrared wavebands. Such a system can simultaneously realize distant stars' navigation and multispectral detection. An experimental setup was constructed to verify the basic principles of the device. The device is used to image an optical-resolution target and a pinhole. The results indicated that the system could perform celestial navigation in the visible waveband and image objects well in multiple wavebands, thereby realizing the integration of deep-space navigation and detection.<br/></div> &copy; 2023 Elsevier Ltd

Number of references:27

Main heading:Optical design

Controlled terms:Imaging systems - Infrared radiation - Navigation

Uncontrolled terms:Common aperture - Deep space navigation and detection - Deep-space navigation - Multi-spectral - Multi-spectral imaging systems - Multispectral imaging - Optical design and fabrication - Simultaneous acquisition - Space detection - Wavebands

Classification code:741.1  Light/Optics - 746  Imaging Techniques

DOI:10.1016/j.optlaseng.2023.107619

Funding details:  Number: 2021YFC2202100, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;

Funding text:The work is supported by National Key R&D Program of 327 China ( 2021YFC2202100 ).

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 141>

 

Accession number:20225113273729

Title:Energy-Efficient Design for a NOMA Assisted STAR-RIS Network With Deep Reinforcement Learning    (Open Access)

Authors:Guo, Yi (1, 2, 3); Fang, Fang (4); Cai, Donghong (5); Ding, Zhiguo (6) 

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) Xi'an Jiaotong University, School of Information and Communications Engineering, Xi'an; 710049, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Western University, Department of Electrical and Computer Engineering, Department of Computer Science, London; ON; N6A 3K7, Canada; (5) Jinan University, College of Cyber Security, Guangzhou; 510632, China; (6) The University of Manchester, School of Electrical and Electronic Engineering, Manchester; M13 9PL, United Kingdom 

Corresponding author:Guo, Yi(guoyi@opt.ac.cn)

Source title:IEEE Transactions on Vehicular Technology

Abbreviated source title:IEEE Trans. Veh. Technol.

Volume:72

Issue:4

Issue date:April 1, 2023

Publication year:2023

Pages:5424-5428

Language:English

ISSN:00189545

E-ISSN:19399359

CODEN:ITVTAB

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:<div data-language="eng" data-ev-field="abstract">Simultaneous transmitting and reflecting reconfigurable intelligent surfaces (STAR-RISs) have been considered promising auxiliary devices to enhance the performance of the wireless network, where users located at different sides of the surfaces can be simultaneously served by the transmitting or reflecting signals. In this article, an energy efficiency (EE) optimization problem for non-orthogonal multiple access (NOMA) assisted STAR-RIS downlink network is investigated. Due to the fractional form of the objective function, it is challenging to solve the EE optimization problem using traditional convex optimization solutions. This article proposes a deep deterministic policy gradient (DDPG)-based algorithm to maximize the EE by jointly optimizing the transmission beamforming vectors at the base station and the coefficients matrices at the STAR-RIS. Simulation results demonstrate that the proposed algorithm can effectively maximize the system EE considering the time-varying channels.<br/></div> &copy; 1967-2012 IEEE.

Number of references:12

Main heading:Energy efficiency

Controlled terms:Convex optimization - Deep learning - Reinforcement learning - Stars

Uncontrolled terms:Deep deterministic policy gradient - Deterministics - Multiple access - Multiple inputs - Multiple-input and single-output - Non-orthogonal - Non-orthogonal multiple access - Policy gradient - Reconfigurable - Simultaneous transmitting and reflecting reconfigurable intelligent surface

Classification code:461.4  Ergonomics and Human Factors Engineering - 525.2  Energy Conservation - 657.2  Extraterrestrial Physics and Stellar Phenomena - 723.4  Artificial Intelligence

DOI:10.1109/TVT.2022.3224926

Funding details:  Number: 201904910016, Acronym: CSC, Sponsor: China Scholarship Council;

Funding text:The work of YiGuo was supported by China Scholarship Council under Grant 201904910016.

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

Open Access type(s): All Open Access, Green

 

<RECORD 142>

 

Accession number:20231814038467

Title:Deep learning methods for medical image fusion: A review

Authors:Zhou, Tao (1, 4); Cheng, QianRu (1, 4); Lu, HuiLing (2); Li, Qi (1, 4); Zhang, XiangXiang (1, 4); Qiu, Shi (3) 

Author affiliation:(1) School of Computer Science and Engineering, North Minzu University, Yinchuan; 750021, China; (2) School of Science, Ningxia Medical University, Yinchuan; 750004, China; (3) Key Laboratory of Spectral Imaging Technology CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (4) Key Laboratory of Image and Graphics Intelligent Processing of State Ethnic Affairs Commission, North Minzu University, Yinchuan; 750021, China 

Corresponding authors:Cheng, QianRu(chengqianru5@163.com); Lu, HuiLing(Lu_huiling@163.com)

Source title:Computers in Biology and Medicine

Abbreviated source title:Comput. Biol. Med.

Volume:160

Issue date:June 2023

Publication year:2023

Article number:106959

Language:English

ISSN:00104825

E-ISSN:18790534

CODEN:CBMDAW

Document type:Journal article (JA)

Publisher:Elsevier Ltd

Abstract:<div data-language="eng" data-ev-field="abstract">The image fusion methods based on deep learning has become a research hotspot in the field of computer vision in recent years. This paper reviews these methods from five aspects: Firstly, the principle and advantages of image fusion methods based on deep learning are expounded; Secondly, the image fusion methods are summarized in two aspects: End-to-End and Non-End-to-End, according to the different tasks of deep learning in the feature processing stage, the non-end-to-end image fusion methods are divided into two categories: deep learning for decision mapping and deep learning for feature extraction. According to the different types of the networks, the end-to-end image fusion methods are divided into three categories: image fusion methods based on Convolutional Neural Network, Generative Adversarial Network, and Encoder-Decoder Network; Thirdly, the application of the image fusion methods based on deep learning in medical image field is summarized from two aspects: method and data set; Fourthly, evaluation metrics commonly used in the field of medical image fusion are sorted out from 14 aspects; Fifthly, the main challenges faced by the medical image fusion are discussed from two aspects: data sets and fusion methods. And the future development direction is prospected. This paper systematically summarizes the image fusion methods based on the deep learning, which has a positive guiding significance for the in-depth study of multi modal medical images.<br/></div> &copy; 2023

Number of references:101

Main heading:Generative adversarial networks

Controlled terms:Convolution - Convolutional neural networks - Decoding - Deep learning - Image fusion - Learning systems - Medical imaging - Network coding

Uncontrolled terms:Convolutional neural network - Data set - Deep learning - Encoder-decoder - Encoder-decoder network - End to end - Hotspots - Image fusion methods - Learning methods - Medical image fusion

Classification code:461.1  Biomedical Engineering - 461.4  Ergonomics and Human Factors Engineering - 716.1  Information Theory and Signal Processing - 723.2  Data Processing and Image Processing - 723.4  Artificial Intelligence - 746  Imaging Techniques

DOI:10.1016/j.compbiomed.2023.106959

Funding details:  Number: 2020BEB04022, Acronym: -, Sponsor: Key Research and Development Program of Ningxia;Number: 62062003, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020KYQD08,2022AAC03149, Acronym: -, Sponsor: Natural Science Foundation of Ningxia Province;Number: -, Acronym: MNU, Sponsor: North Minzu University;

Funding text:This research was funded by the National Natural Science Foundation of China , grant no. 62062003 , Key Research and Development Program of Ningxia , grant no. 2020BEB04022 , Natural Science Foundation of Ningxia Province , grant no. 2022AAC03149 , and Key Research and Development Program of Ningxia , grant no. 2020KYQD08 .This project was carried out by Tao Zhou's Laboratory of Computer Science and Engineering School of North Minzu University. It was guided and supported by the research direction of Tao Zhou's team from North Minzu University of science and technology . We sincerely thank them for their help in revising the paper.This research was funded by the National Natural Science Foundation of China, grant no.62062003, Key Research and Development Program of Ningxia, grant no.2020BEB04022, Natural Science Foundation of Ningxia Province, grant no.2022AAC03149, and Key Research and Development Program of Ningxia, grant no.2020KYQD08.This project was carried out by Tao Zhou's Laboratory of Computer Science and Engineering School of North Minzu University. It was guided and supported by the research direction of Tao Zhou's team from North Minzu University of science and technology. We sincerely thank them for their help in revising the paper.

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 143>

 

Accession number:20231013682084

Title:Nested multi-scale transform fusion model: The response evaluation of chemoradiotherapy for patients with lung tumors

Authors:Zhou, Tao (1, 4); Liu, Shan (1, 4); Lu, Huiling (2); Bai, Jing (1, 4); Zhi, Lijia (1, 4); Shi, Qiu (3) 

Author affiliation:(1) School of Computer Science and Engineering, North Minzu University, Ningxia, Yinchuan; 750021, China; (2) School of Science, Ningxia Medical University, Ningxia, Yinchuan; 750004, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (4) The Key Laboratory of Images and Graphics Intelligent Processing of State Ethnic Affairs Commission, North Minzu University, Yinchuan; 750021, China 

Corresponding author:Lu, Huiling(lu_huiling@163.com)

Source title:Computer Methods and Programs in Biomedicine

Abbreviated source title:Comput. Methods Programs Biomed.

Volume:232

Issue date:April 2023

Publication year:2023

Article number:107445

Language:English

ISSN:01692607

E-ISSN:18727565

CODEN:CMPBEK

Document type:Journal article (JA)

Publisher:Elsevier Ireland Ltd

Abstract:<div data-language="eng" data-ev-field="abstract">Background and Objective: The response evaluation of chemoradiotherapy is an important method of precision treatment for patients with malignant lung tumors. In view of the existing evaluation criteria for chemoradiotherapy, it is difficult to synthesize the geometric and shape characteristics of lung tumors. In the present, the response evaluation of chemoradiotherapy is limited. Therefore, this paper constructs a response evaluation system of chemoradiotherapy based on PET/CT images. Methods: There are two parts in the system: a nested multi-scale fusion model and an attribute sets for the Response evaluation of chemoradiotherapy (AS-REC). In the first part, a new nested multi-scale transform method, i.e., latent low-rank representation (LATLRR) and non-subsampled contourlet transform (NSCT), is proposed. Then, the average gradient self-adaptive weighting is used for the low-frequency fusion rule, and the regional energy fusion rule is used for the high-frequency fusion rule. Further, the low-rank part fusion image is obtained by the inverse NSCT, and the fusion image is generated by adding the low-rank part fusion image and the significant part fusion image. In the second part, AS-REC is constructed to evaluate the growth direction of the tumor, the degree of tumor metabolic activity, and the tumor growth state. Results: the numerical results clearly show that the performance of our proposed method outperforms in comparison with several existing methods, among them, the value of Qabf increased by up to 69%. Conclusions: Through the experiment of three reexamination patients, the effectiveness of the evaluation system of radiotherapy and chemotherapy are proved.<br/></div> &copy; 2023 Elsevier B.V.

Number of references:26

Main heading:Chemotherapy

Controlled terms:Biological organs - Chemoradiotherapy - Contourlet transform - Image fusion - Inverse problems - Numerical methods - Tumors

Uncontrolled terms:Attribute set for the response evaluation of chemoradiotherapy - Attribute sets - Contourlet transform - Fusion image - Latent low-rank representation - Low-rank representations - Lung tumor - Non-subsampled contourlet - Non-subsampled contourlet transform - PET/CT fusion

Classification code:461.2  Biological Materials and Tissue Engineering - 461.6  Medicine and Pharmacology - 723.2  Data Processing and Image Processing - 921.3  Mathematical Transformations - 921.6  Numerical Methods

Numerical data indexing:Percentage 6.90E+01%

DOI:10.1016/j.cmpb.2023.107445

Funding details:  Number: 2020KYQD08, Acronym: -, Sponsor: -;Number: 62062003, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2022AAC03149, Acronym: -, Sponsor: Natural Science Foundation of Ningxia Province;

Funding text:This work was supported in part by the Natural Science Foundation of China under Grant No. 62062003 , Natural Science Foundation of Ningxia under Grant No. 2022AAC03149, North Minzu University Research Project of Talent Introduction under Grant No. 2020KYQD08.

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 144>

 

Accession number:20230313385584

Title:Optical design and implementation of a compact and long focal length imaging system

Authors:Zhong, Yue (1); Chang, Jun (1); Zhao, Xuehui (1); Du, Shan (1); Mu, Yu (1); Jiang, Huilin (1, 2); Li, Xuyang (3) 

Author affiliation:(1) Key Laboratory of Photoelectronic Imaging Technology and System of Ministry of Education of China, School of Optics and Photonics, Beijing Institute of Technology, Beijing; 100081, China; (2) School of Opto-Electronic Engineering, Changchun University of Science and Technology, Changchun; 130022, China; (3) Space Optics Lab, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China 

Corresponding author:Chang, Jun(optics_chang@126.com)

Source title:Optics and Lasers in Engineering

Abbreviated source title:Opt Lasers Eng

Volume:163

Issue date:April 2023

Publication year:2023

Article number:107467

Language:English

ISSN:01438166

CODEN:OLENDN

Document type:Journal article (JA)

Publisher:Elsevier Ltd

Abstract:<div data-language="eng" data-ev-field="abstract">In this paper, we demonstrate a compact and long focal length imaging system for building detection. This system is an all-spherical system. In order to avoid the use of aspheres, the system relies on two groups of correction elements to correct aberrations. This allows for short manufacturing cycles and simplified adjustments. The system works in the visible band from 460 nm to 750 nm. The focal length is 900 mm, and the optical length is only 280 mm. The designed modulation transfer function (MTF) is consistent with the diffraction limit. The MTF curve is 0.63 at the Nyquist frequency of 78 lp/mm. The optomechanical structure is developed based on the analysis consequence of tolerance and stray light, and a device is fabricated. We also propose a simplified method for measuring the space between the primary mirror and the secondary mirror in a compact coaxial optical system. According to the experimentation, the device is proven to meet the application requirement. Detailed descriptions of the design and implementation are provided.<br/></div> &copy; 2022 Elsevier Ltd

Number of references:27

Main heading:Optical design

Controlled terms:Diffraction - Imaging systems - Mirrors - Optical systems - Optical transfer function - Stray light

Uncontrolled terms:All-spherical system - Aspheres - Building detection - Correction elements - Design and implementations - Long focal lengths - Manufacturing cycle - Optical length - Visible band

Classification code:741.1  Light/Optics - 741.3  Optical Devices and Systems - 746  Imaging Techniques

Numerical data indexing:Size 2.80E-01m, Size 4.60E-07m to 7.50E-07m, Size 9.00E-01m

DOI:10.1016/j.optlaseng.2022.107467

Funding details:  Number: 2021YFC2202100, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;

Funding text:The work is supported by National Key R&D Program of China (2021YFC2202100).

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 145>

 

Accession number:20224313003896

Title:The generation and observation of pulses with switchable single/dual wavelengths and tunable bandwidth from a SWNT mode-locked Er-doped fiber laser

Authors:Hu, Guoqing (1, 2); Wang, Chen (1, 2); Chen, Kai (3); Wen, Junyue (1, 2); Guo, Guowen (1, 2); Liu, Ya (4); Chen, Guangwei (1, 2); Zhu, Lianqing (1, 2) 

Author affiliation:(1) Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument, Beijing Information Science & Technology University, Beijing; 100192, China; (2) Beijing Laboratory of Optical Fiber Sensing and System, Beijing Information Science & Technology University, Beijing; 100016, China; (3) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China; (4) Yunnan Key Laboratory of Opto-Electronic Information Technology, School of Physics and Electronic Information Technology, Yunnan Normal University, Kunming; 650500, China 

Corresponding author:Zhu, Lianqing(guoqing2011@foxmail.com)

Source title:Optics and Laser Technology

Abbreviated source title:Opt Laser Technol

Volume:158

Issue date:February 2023

Publication year:2023

Article number:108715

Language:English

ISSN:00303992

CODEN:OLTCAS

Document type:Journal article (JA)

Publisher:Elsevier Ltd

Abstract:<div data-language="eng" data-ev-field="abstract">Mode-locked pulse outputs with switchable single/dual wavelengths and widely tunable spectral bandwidth are demonstrated by fully exploiting multiple soliton formation mechanisms combining single-wall carbon nanotube, intracavity loss tuning and nonlinear polarization rotation. An isolator with single-polarization fiber pigtails is additionally inserted in a ring fiber laser cavity to introduce polarization-dependent loss modulation for gain profile tuning and nonlinear polarization rotation. Mode-locked by a home-made single-wall carbon nanotube saturable absorber, switchable single/dual-wavelength pulses centered in the 1530- or/and 1550-nm gain regions of erbium-doped fiber are experimentally observed by tuning the intracavity loss to tilt the gain profile. Moreover, the spectral bandwidths of single-wavelength pulses centered in the 1530- and 1550 nm regions could be continuously tuned from 2.4 to 4.0 nm, and 2.7 to 9.0 nm, respectively. Such widely tunable spectral bandwidths are attributed to hybrid mode-locked mechanisms combining the nonlinear polarization rotation and single-wall carbon nanotube. Our results give a deep insight into the well-controlled gain profile tuning and provide a relatively simple setup and method to obtain bandwidth-tunable, wavelength-switchable pulse outputs, showing the potential to meet various requirements of ultrafast laser applications.<br/></div> &copy; 2022

Number of references:54

Main heading:Fiber lasers

Controlled terms:Bandwidth - Fibers - Locks (fasteners) - Mode-locked fiber lasers - Polarization - Rotation - Single-walled carbon nanotubes (SWCN) - Ultrafast lasers

Uncontrolled terms:Dual-wavelength - Intracavity loss - Intracavity loss tuning - Mode-locked - Mode-locked pulse - Nonlinear polarization rotation - Single Wall - Single-wall carbon nanotube - Spectral bandwidth - Switchable

Classification code:716.1  Information Theory and Signal Processing - 744.1  Lasers, General - 744.4  Solid State Lasers - 761  Nanotechnology - 931.1  Mechanics - 933.1  Crystalline Solids

Numerical data indexing:Size 1.53E-06m, Size 1.55E-06m, Size 2.40E-09m to 4.00E-09m, Size 2.70E-09m to 9.00E-09m

DOI:10.1016/j.optlastec.2022.108715

Funding details:  Number: KM202211232001, Acronym: -, Sponsor: -;Number: 52105540,61801030,61903042,62005020,62105036,62105038, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2214058,3204047,4202027,4212048,4214081,51535002, Acronym: -, Sponsor: Natural Science Foundation of Beijing Municipality;

Funding text:This work is supported by R&D Program of Beijing Municipal Education Commission (KM202211232001), National Natural Science Foundation of China (62105038, 62105036, 52105540, 62005020, 61903042, 61801030); Beijing Natural Science Foundation (3204047, 4214081, 2214058, 4212048, 4202027); Key Projects of the National Natural Science Foundation of China (51535002).

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 146>

 

Accession number:20230713574407

Title:A pupil detection method based on Unet with attention module and shape-prior loss

Authors:Song, Wenhui (1, 2, 3); Wang, Hui (1, 2, 3); Gui, Yawei (1, 2, 3); Dang, Ruochen (1, 2, 3); Hu, Bingliang (1, 3); Wang, Quan (1, 3) 

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology, Xi an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Key Laboratory of Biomedical Spectroscopy of Xi an, Key Laboratory of Spectral Imaging Technology, Xi an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences, Xi'an; 710119, China 

Corresponding authors:Hu, Bingliang(hbl@opt.ac.cn); Wang, Quan(wangquan@opt.ac.cn)

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:12558

Part number:1 of 1

Issue title:AOPC 2022: Optical Spectroscopy and Imaging

Issue date:2023

Publication year:2023

Article number:125580L

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510662308

Document type:Conference article (CA)

Conference name:2022 Applied Optics and Photonics China: Optical Spectroscopy and Imaging, AOPC 2022

Conference date:December 18, 2022  -  December 19, 2022

Conference location:Virtual, Online, China

Conference code:186190

Sponsor:Chinese Society for Optical Engineering (CSOE)

Publisher:SPIE

Abstract:<div data-language="eng" data-ev-field="abstract">In recent years, pupil detection in human eye images or videos has played a key role in many fields. In the field of eye tracking, the position of the center of the pupil is a basic problem, and the error of pupil detection will be magnified in subsequent calculations, which will seriously affect the performance of eye tracking. In this paper, we propose to use the currently popular semantic segmentation network for pupil detection task. We first train the Unet architecture as a benchmark, then introduce two different attention modules into Unet, and compare with the benchmark network. The results show that our method has a higher detection rate within 1-15 pixel errors. We also added an ellipse fitting error term to the loss function of the network to further improve the network performance. The training of the model is done on the LPW dataset. Finally, we also investigate the effect of data augmentation on generalization performance, with the model trained on the LPW dataset and tested on the I-SOCIALDB dataset. Although data enhancement slightly reduces the detection rate of the model in the original data set, it can improve the generalization performance of the model.<br/></div> &copy; COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

Number of references:12

Main heading:Eye tracking

Controlled terms:Semantics

Uncontrolled terms:Attention mechanisms - Data augmentation - Eye-tracking - Infrared and visible light image - Infrared light - Pupils detection - Shape priors - Shape-prior loss - Unet - Visible light images

DOI:10.1117/12.2651952

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 147>

 

Accession number:20230613542994

Title:VG-Swarm: A Vision-Based Gene Regulation Network for UAVs Swarm Behavior Emergence    (Open Access)

Authors:Li, Huanlin (1); Cai, Yuwei (1); Hong, Juncao (1); Xu, Peng (1); Cheng, Hui (2); Zhu, Xiaomin (3); Hu, Bingliang (4); Hao, Zhifeng (1); Fan, Zhun (1) 

Author affiliation:(1) University of Shantou, Key Lab of Digital Signal and Image Processing of Guangdong Province, College of Engineering, Guangdong; 515063, China; (2) University of Sun Yat-Sen, School of Computer Science and Engineering, Guangdong; 510006, China; (3) College of Systems Engineering, National University of Defense Technology Changsha, Hunan; 410073, China; (4) Xi'An Institute of Optics and Precision Mechanics, Shanxi; 710119, China 

Corresponding author:Fan, Zhun(zfan@stu.edu.cn)

Source title:IEEE Robotics and Automation Letters

Abbreviated source title:IEEE Robot. Autom.

Volume:8

Issue:3

Issue date:March 1, 2023

Publication year:2023

Pages:1175-1182

Language:English

E-ISSN:23773766

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:<div data-language="eng" data-ev-field="abstract">We present VG-Swarm, a practical and effective method for aerial robots dynamic encirclement, which consists of a vision-based gene regulatory network (V-GRN) and a visual perception module. For each flying robot deployed with the proposed method, the relative spatial positions of the surrounding robots, targets, and obstacles are first obtained by omnidirectional monocular vision. Then the proposed method is used to generate the concentration field within its own perception range according to the obtained position information. The agent individually calculates and selects an optimal moving direction in its concentration field, and finally stays on its selected encirclement pattern (a closed concentration contour around the target). As a result, a swarm of flying robots can emerge adaptive pattern formations to entrap the targets even without any communication and global information. We verify the effectiveness and robustness of the proposed method in various simulations and real-world experiments.<br/></div> &copy; 2016 IEEE.

Number of references:23

Main heading:Robots

Controlled terms:Antennas - Behavioral research - Genes - Swarm intelligence - Vision

Uncontrolled terms:Adaptation models - Aerial system: perception and autonomy - Aerial systems - Behavioral science - Biologically-inspired robots - Pattern formation - Swarm robotics - System perception - Vision based - Visual perception

Classification code:461.2  Biological Materials and Tissue Engineering - 461.4  Ergonomics and Human Factors Engineering - 723.4  Artificial Intelligence - 731.5  Robotics - 971  Social Sciences

DOI:10.1109/LRA.2023.3236565

Funding details:  Number: 62176147, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021ZD0111502, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;

Funding text:Thisworkwas supported in part by the National Key R&D Program of China under Grant 2021ZD0111502 and in part by the National Natural Science Foundation of China under Grant 62176147.

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

Open Access type(s): All Open Access, Green

 

<RECORD 148>

 

Accession number:20230613559817

Title:Design of Large Aperture and Large Field of View Receiving Optical System Based on Catadioptric System

Authors:Chao, Li (1, 2); Yingjun, Ma (1); Youhui, Huo (1, 3); Weining, Chen (1) 

Author affiliation:(1) Xi&rsquo;an Institute Optics and Precision Mechanics, Chinese Academ of Sciences, Shaanxi, Xi&rsquo;an; 710119, China; (2) Shaanxi Normal University, ShaanXi, Xi&rsquo;an; 710119, China; (3) University of Chinses Academy of Sciences, Beijing; 100049, China 

Corresponding author:Weining, Chen(cwn@opt.ac.cn)

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:12559

Part number:1 of 1

Issue title:AOPC 2022: Novel Optical Design; and Optics Ultra Precision Manufacturing and Testing

Issue date:2023

Publication year:2023

Article number:125590E

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510662322

Document type:Conference article (CA)

Conference name:2022 Applied Optics and Photonics China: Novel Optical Design; and Optics Ultra Precision Manufacturing and Testing, AOPC 2022

Conference date:December 18, 2022  -  December 19, 2022

Conference location:Virtual, Online, China

Conference code:186191

Sponsor:Chinese Society for Optical Engineering (CSOE)

Publisher:SPIE

Abstract:<div data-language="eng" data-ev-field="abstract">The structure of the initial system is calculated according to the aberration theory, in which the radius of the primary mirror is 300 mm, the radius of the secondary mirror is 320 mm, the distance between the primary mirror and the secondary mirror is 90 mm, and the blocking ratio is close to 0.4, and the occlusion ratio is close to 0.4. A three-piece correction lens set is designed to solve the spherical aberration and comet aberration caused by the Cassegrain system in the large field of view, and the imaging of the edge field of view of the large field of view system is realized. Through the optimization and layout of the overall system, the MTF value of the system is finally greater than 0.4 within the frequency of 130 lp/mm. This paper provides important reference value for the design of catadioptric optical system with large aperture and large field of view.<br/></div> &copy; 2023 SPIE.

Number of references:10

Main heading:Optical design

Controlled terms:Aberrations - Aspherics - Mirrors - Optical systems

Uncontrolled terms:Aberration theory - Aperture fields - Cassegrain - Cassegrain system - Catadioptrics - Imaging quality - Large aperture - Large field of views - Primary mirrors - Secondary mirror

Classification code:741.1  Light/Optics - 741.3  Optical Devices and Systems

Numerical data indexing:Size 3.00E-01m, Size 3.20E-01m, Size 9.00E-02m

DOI:10.1117/12.2651842

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 149>

 

Accession number:20231914072408

Title:An Overview of Spaceborne Atmospheric Wind Field Measurement with Passive Optical Remote Sensing

Title of translation:&#26143; &#36733; &#34987; &#21160; &#20809; &#23398; &#36965; &#24863; &#22823; &#27668; &#39118; &#22330; &#25506; &#27979; &#25216; &#26415; &#36827; &#23637; &#32508; &#36848;

Authors:Feng, Yutao (1); Fu, Di (1, 2); Zhao, Zengliang (3); Zong, Weiguo (4); Yu, Tao (5); Sheng, Zheng (6); Zhu, Yajun (7) 

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Beijing Institute of Applied Meteorology, Beijing; 100029, China; (4) Key Laboratory of Space Weather, National Satellite Meteorological Center, National Center for Space Weather, China Meteorological Administration, Beijing; 100081, China; (5) School of Geophysics and Geomatics, China University of Geosciences, Hubei, Wuhan; 430074, China; (6) College of Meteorology and Oceanography, National University of Defense Technology, Hunan, Changsha; 410073, China; (7) State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing; 100088, China 

Corresponding author:Feng, Yutao(fytciom@126.com)

Source title:Guangxue Xuebao/Acta Optica Sinica

Abbreviated source title:Guangxue Xuebao

Volume:43

Issue:6

Issue date:March 2023

Publication year:2023

Article number:0601011

Language:Chinese

ISSN:02532239

CODEN:GUXUDC

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:<div data-language="eng" data-ev-field="abstract">Significance Wind field is an important parameter characterizing the dynamic characteristics of the earth's atmospheric system, and it serves as basic data necessary for business work and scientific research in fields such as weather forecasting, space weather, and climatology. The wind field measurement based on satellite remote sensing is not limited by geographical conditions. It can determine the intensity and direction information of the atmospheric wind field at different altitudes by monitoring the motion state of ocean waves, clouds, aerosols, and atmospheric components. It can not only obtain the observation data of ocean, desert, and polar regions, which are difficult to be collected by conventional methods, but also obtain the profile information of the wind field along the height distribution. As one of the main techniques in atmospheric wind field measurement, passive optical remote sensing has the characteristics of high accuracy, large altitude coverage, and small resource occupation. Great progress in the past half century has been made, and various wind measurement technologies have been developed such as atmospheric motion vectors, infrared hyperspectral analysis of water vapor, wind imaging interferometer, and Doppler modulated gas correlation, which can realize wind field measurement in an altitude ranging from 1 km near the surface to 300-400 km and form a reliable verification and capability complementation with active wind field measurement technologies such as lidar and microwave. In order to promote the development of spaceborne passive optical remote sensing for measuring atmospheric wind fields, it is necessary to summarize and discuss the existing research progress and future development trends, so as to provide a reference for the development of future passive optical remote sensing detection technology for atmospheric wind field and the task planning in atmospheric wind field detection. Progress This review focuses on two types of spaceborne optical passive techniques for wind field measurement based on atmospheric motion vector monitoring and atmospheric spectral Doppler shift detection. The fundamental theories, basic inversion methods, and the progress of research and application of representative payloads of various passive wind field detection technologies are summarized (Table 4). The atmospheric motion vector detection technology relies on cloud map observation to realize wind field detection. It has the characteristics of high spatial resolution and high detection accuracy and can obtain meter-level and precise wind field data at a sub-kilometer scale. However, limited by its detection technology mechanism, its detection altitude and efficiency are also significantly restricted. Infrared hyperspectral wind field measurement technology is based on infrared images of specific water vapor spectral channels and profile data to track the movement of characteristic image targets at specific altitudes to invert atmospheric wind speed, which is used for troposphere wind measurement, with high vertical resolution and profile data, and it is less affected by the cloud. Compared with those of the cloud-derived motion vector (CMV) technology, its measurement accuracy and horizontal spatial resolution of wind speed and direction need to be improved. However, as infrared hyperspectral loading and wind field inversion algorithms develop, infrared hyperspectral wind field measurement technology will become an important technology for troposphere wind. The wind field interferometer obtains the interferogram of the fine atmospheric spectrum from the limb observation, inverts the Doppler frequency shift of the atmospheric spectrum through the intensity position or phase change in the interferogram, and then realizes the measurement of the atmospheric wind field. The spaceborne application of this technology began in the late 1960s, and three technical systems have been developed, namely, Michelson interferometer, Fabry-P&eacute;rot interferometer, and Doppler asymmetric spatial heterodyne interferometer. The detection altitude covers most of the atmosphere including the stratosphere, mesosphere, and thermosphere. It features continuous profile detection capability, vertical resolution with an order of kilometers, and horizontal spatial resolution with an order of 100 km, and the highest peak accuracy of wind speed measurement has reached 3 m/s. The Doppler modulated gas correlation technology modulates and filters the incident spectrum through a molecular filter with its composition the same as the target atmospheric composition, so as to realize the frequency shift detection of the atmospheric spectrum and the detection of the wind. Compared with traditional spaceborne wind field measurement technologies, it has the advantages of high horizontal resolution, small size, light weight, and low power consumption and has a good application prospect in the field of small satellite network observation. At present, the technology is still in the stage of technical verification and application testing, and it is expected to further improve the vertical resolution of the limb observation, but the space for improving the effective horizontal resolution is limited. Conclusions and Prospects Through the technical research and payload application in the past 20 to 30 years, China's spaceborne passive optical atmospheric wind field detection technology is gradually narrowing the gap with the international leading level. However, in general, the spaceborne atmospheric wind field detection capability based on passive optical remote sensing still has problems such as discontinuous altitude profile coverage, incomplete local coverage of middle and high level wind field data, and limited spatial resolution of high level wind field data. In the future, the accuracy and resolution of profile data products for tropospheric wind field elements should be improved, and the gaps in China's middle and upper level atmospheric wind field observation data in terms of global scale should be filled. In addition, As China's planetary scientific research and deep-space exploration plans develop, the wind field detection for the atmospheres of Mars, Jupiter, and other planets is also an important direction for the development of wind measurement technology based on passive optical remote sensing.<br/></div> &copy; 2023 Chinese Optical Society. All rights reserved.

Number of references:100

Main heading:Optical remote sensing

Controlled terms:Hyperspectral imaging - Interferometers - Optical radar - Space optics - Vector spaces - Vectors - Water waves - Weather forecasting

Uncontrolled terms:Atmosphere wind field - Cloud-derived motion vector - Dopple modulated gas correlation - Doppler - Gas correlations - Hyper spectra - Infrared hyperspectrum - Motion Vectors - Wind field - Wind interferometer

Classification code:443  Meteorology - 471.4  Seawater, Tides and Waves - 656.1  Space Flight - 716.2  Radar Systems and Equipment - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 746  Imaging Techniques - 921  Mathematics - 921.1  Algebra - 941.3  Optical Instruments

Numerical data indexing:Age 2.00E+01yr to 3.00E+01yr, Size 1.00E+03m, Size 1.00E+05m, Size 3.00E+05m to 4.00E+05m, Velocity 3.00E+00m/s

DOI:10.3788/AOS221462

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 150>

 

Accession number:20230066265

Title:ULTRA BROADBAND COHERENT DIFFRACTIVE IMAGING A FAST MONOCHROMATIZATION METHOD

Authors:Li, Boyang (1) 

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

Source title:arXiv

Abbreviated source title:arXiv

Issue date:January 11, 2023

Publication year:2023

Language:English

E-ISSN:23318422

Document type:Preprint (PP)

Publisher:arXiv

Abstract:<div data-language="eng" data-ev-field="abstract">Coherent diffractive imaging (CDI) as a lensless imaging technique, has been applied in a wide range of sciences. However it is not compatible with short pulse lasers, because it is limited with monochromatic illumination. Although there have been reports on the broadband CDI, the bandwidth is limited with 10% for robust imaging. In this article, we report a algorithm which is able to CDI robustly with at least 80% bandwidth. This algorithm is apply to published experiment data and simulated ultra-broadband data to demonstrate its ability. This technique enables us to capture the non-repeatable transient dynamics as short as the laser pulse width, which is one step forward to the ultrafast CDI.<br/></div> Copyright &copy; 2023, The Authors. All rights reserved.

Number of references:17

Main heading:Bandwidth

Controlled terms:Laser pulses - Ultra-wideband (UWB)

Uncontrolled terms:A* algorithm - Broad-band data - Coherent diffractive imaging - Experiment data - Lensless imaging technique - Monochromatic illumination - Monochromatization - Short-pulse lasers - Transient dynamics - Ultra-broadband

Classification code:716.1  Information Theory and Signal Processing - 716.3  Radio Systems and Equipment - 744.1  Lasers, General

Numerical data indexing:Percentage 1.00E+01%, Percentage 8.00E+01%

DOI:10.48550/arXiv.2302.08898

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.Preprint ID:2302.08898v1

Preprint source website:https://arxiv.org

Preprint ID type:ARXIV

 

 

<RECORD 151>

 

Accession number:20230813600620

Title:Research on the Key Technology of High Resolution Low-Light-Level Remote Sensing

Authors:Bai, Zhe (1); Ma, Yilong (1) 

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

Corresponding author:Ma, Yilong

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:12557

Part number:1 of 1

Issue title:AOPC 2022: Optical Sensing, Imaging, and Display Technology

Issue date:2023

Publication year:2023

Article number:125571X

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510662285

Document type:Conference article (CA)

Conference name:2022 Applied Optics and Photonics China: Optical Sensing, Imaging, and Display Technology, AOPC 2022

Conference date:December 18, 2022  -  December 19, 2022

Conference location:Virtual, Online, China

Conference code:186412

Sponsor:Chinese Society for Optical Engineering (CSOE)

Publisher:SPIE

Abstract:<div data-language="eng" data-ev-field="abstract">In recent years, besides higher spatial resolution, higher temporal resolution and higher spectral resolution, extending the effective working time of satellite platform based aerospace paid much attention. And Low-light-level(LLL) remote sensing technology in visible band is one of the ways to achieve the goal. LLL remote-sensing camera has become a novel subject for the development of aerospace optical remote-sensing payloads. In this manuscript, first the status quo and trend of LLL remote sensing technology is made a comprehensive introduction. After that, centering on the crucial technique to realize the low-light-level sensing, several different implementation ways are made a comparison both from the theoretical viewpoint and experiment demonstration. Finally, some advices are given on how to develop aerospace LLL remote sensing techniques based on the existing research results.<br/></div> &copy; 2023 SPIE.

Number of references:6

Main heading:Optical remote sensing

Uncontrolled terms:Dynamic range - EMCCD - High resolution - High spatial resolution - ICCD - Key technologies - Low light level - Remote sensing technology - Remote-sensing - SCMOS

Classification code:741.3  Optical Devices and Systems

DOI:10.1117/12.2651915

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 152>

 

Accession number:20224813193570

Title:Modified achromatic Savart polariscope for broadband spatially modulated snapshot imaging polarimeter

Authors:Quan, Naicheng (1); Li, Siyuan (1, 2); Zhang, Chunmin (2) 

Author affiliation:(1) School of Materials Science and Engineering, Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics, Key Laboratory of Spectral Imaging Technology CAS, Xi'an University of Technology, Xi'an, China; (2) Xi'an Jiaotong University, Xi'an, China 

Corresponding author:Quan, Naicheng(quanncx@hotmail.com)

Source title:Optics and Lasers in Engineering

Abbreviated source title:Opt Lasers Eng

Volume:162

Issue date:March 2023

Publication year:2023

Article number:107398

Language:English

ISSN:01438166

CODEN:OLENDN

Document type:Journal article (JA)

Publisher:Elsevier Ltd

Abstract:<div data-language="eng" data-ev-field="abstract">This paper presents the modified achromatic Savart Polariscope for constructing broadband spatially modulated snapshot imaging polarimeter. The modified achromatic Savart Polariscope can be made from two different birefringent crystals. The achievements and performances of the modified achromatic Savart Polariscope are demonstrated with numerical simulations. The chromatic variations in spatial carrier frequencies can be reduced by an order of magnitude. The spatially modulated snapshot imaging polarimeter constructed by the modified achromatic Savart Polariscopes can achieve the root mean square errors with a magnitude of 10^&minus;4 across the spectral range 0.48&ndash;0.96 &mu;m as it does in monochromatic light conditions.<br/></div> &copy; 2022 Elsevier Ltd

Number of references:17

Main heading:Mean square error

Controlled terms:Polarimeters

Uncontrolled terms:Birefringent crystals - Carrier frequency - Imaging Polarimeter - Orders of magnitude - Performance - Root mean square errors - Savart polariscope - Spatially modulated - Spatially modulation - Spectral range

Classification code:922.2  Mathematical Statistics - 941.3  Optical Instruments

Numerical data indexing:Size 4.80E-07m to 9.60E-07m

DOI:10.1016/j.optlaseng.2022.107398

Funding details:  Number: CXY-2021-121, Acronym: -, Sponsor: -;Number: 61805193, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020M673448, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: 2018440, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;

Funding text:The authors thank the anonymous reviewers for their helpful comments and constructive suggestions. The work was supported by Youth Innovation Promotion Association of the Chinese Academy of Sciences ( 2018440 ), National Natural Science Foundation of China ( 61805193 ), China Postdoctoral Science Foundation ( 2020M673448 ) and Yulin Municipal Science and Technology Foundation (CXY-2021-121).

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 153>

 

Accession number:20230713593009

Title:Multiple Attention Mechanism Enhanced YOLOX for Remote Sensing Object Detection    (Open Access)

Authors:Shen, Chao (1, 2); Ma, Caiwen (1); Gao, Wei (1) 

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

Corresponding author:Ma, Caiwen(cwma@opt.ac.cn)

Source title:Sensors

Abbreviated source title:Sensors

Volume:23

Issue:3

Issue date:February 2023

Publication year:2023

Article number:1261

Language:English

ISSN:14248220

Document type:Journal article (JA)

Publisher:MDPI

Abstract:<div data-language="eng" data-ev-field="abstract">The object detection technologies of remote sensing are widely used in various fields, such as environmental monitoring, geological disaster investigation, urban planning, and military defense. However, the detection algorithms lack the robustness to detect tiny objects against complex backgrounds. In this paper, we propose a Multiple Attention Mechanism Enhanced YOLOX (MAME-YOLOX) algorithm to address the above problem. Firstly, the CBAM attention mechanism is introduced into the backbone of the YOLOX, so that the detection network can focus on the saliency information. Secondly, to identify the high-level semantic information and enhance the perception of local geometric feature information, the Swin Transformer is integrated into the YOLOX&rsquo;s neck module. Finally, instead of GIOU loss, CIoU loss is adopted to measure the bounding box regression loss, which can prevent the GIoU from degenerating into IoU. The experimental results of three publicly available remote sensing datasets, namely, AIBD, HRRSD, and DIOR, show that the algorithm proposed possesses better performance, both in relation to quantitative and qualitative aspects.<br/></div> &copy; 2023 by the authors.

Number of references:39

Main heading:Object detection

Controlled terms:Environmental technology - Object recognition - Remote sensing - Semantics

Uncontrolled terms:Attention mechanisms - CBAM - Detection technology - Environmental Monitoring - Geological disaster - Loss functions - Multiple attention - Objects detection - Remote-sensing - Swin transformer

Classification code:454  Environmental Engineering - 723.2  Data Processing and Image Processing

DOI:10.3390/s23031261

Funding details:  Number: -, Acronym: IMII, Sponsor: Institute of Infection and Immunity;Number: XDA15020604, Acronym: CAS, Sponsor: Chinese Academy of Sciences;

Funding text:This work was supported by the Strategic Priority Program on Space Science (III) Chinese Academy of Science (CAS) Program, grant number XDA15020604.

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

Open Access type(s): All Open Access, Gold, Green

 

<RECORD 154>

 

Accession number:20232314196689

Title:X-ray transmission effects in a high-density dynamic-dusty plasma environment

Authors:Li, Yao (1); Yang, Zhiqiang (1); Zhang, Yingjun (2); Chen, Mingde (3); Xia, Fangyuan (2, 4, 5); Yang, Lihong (1); Zhang, Furui (1); Wu, Yinhua (1); Tan, Zhenkun (1); Yang, Chen (1); Su, Tong (3) 

Author affiliation:(1) College of Optoelectronic Engineering, Xi'an Technological University, Xi'an, China; (2) Xi'an Institute of Space Radio Technology, Xi'an, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (4) Beijing Institute of Tracking and Telecommunication Technology, Beijing, China; (5) Beijing University of Posts and Telecommunication, Beijing, China 

Corresponding authors:Li, Yao(liyao_xatu@163.com); Su, Tong(sutong@opt.ac.cn)

Source title:Vacuum

Abbreviated source title:Vacuum

Volume:212

Issue date:June 2023

Publication year:2023

Article number:112260

Language:English

ISSN:0042207X

CODEN:VACUAV

Document type:Journal article (JA)

Publisher:Elsevier Ltd

Abstract:<div data-language="eng" data-ev-field="abstract">X-ray communication (XCOM), which employs modulated X-ray photons as the carrier for signal transmission, is a promising wireless optical technology for space applications, particularly during spacecraft blackout re-entry. Currently, several challenges related to XCOM require solutions, including incomplete transmission attenuation models and a lack of experimental verification of the dynamic-dusty communication effects. This study improved the XCOM transmission characteristics in high-density dynamic-dusty plasma based on a collision model. A dynamic-dusty plasma XCOM was built to verify a modulated X-ray tube and an alkali-metal plasma source. The results show that with an increase in photon energy and flow, the X-ray carrier achieves a higher transmission speed, which is sharper than that of photon energy under the influence of flow. When the average electron density of the dusty plasma is 10¹²&ndash;10¹³ cm^&minus;2, the plasma flow speed is 550&ndash;650 m/s, the macro temperature exceeds 1500 K, and the communication demonstration system achieves a stable data rate of 50 kbps at a bit error (BER) of 1.7 &times; 10^&minus;5 with a carrier amplitude and frequency of approximately 20 kV and 4.8 Mcps, respectively. This experiment yielded theoretical and actual values for the development of XCOM technology in space applications during re-entry blackouts.<br/></div> &copy; 2023

Number of references:32

Main heading:Photons

Controlled terms:Bit error rate

Uncontrolled terms:Bit error ratios - Dusty plasmas - Dynamic-dusty plasma - Photon energy - Plasma environments - Pulse x-ray - Signal transmission - X-ray communication - X-ray transmission - X-rays photons

Classification code:723.1  Computer Programming - 931.3  Atomic and Molecular Physics

Numerical data indexing:Bit rate 5.00E+04bit/s, Size 1.30E-01m, Temperature 1.50E+03K, Velocity 5.50E+02m/s to 6.50E+02m/s, Voltage 2.00E+04V

DOI:10.1016/j.vacuum.2023.112260

Funding details:  Number: 21JY016, Acronym: -, Sponsor: -;Number: 12103039,62001363,62001364,62101420,62271483, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020JQ-818,2021JM-432,2021JQ-640, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;

Funding text:This study was supported by the National Natural Science Foundation of China (Grant No. 62001364 , No. 62001363 , No. 62101420 , No. 12103039 , and No. 62271483 ), the Natural Science Basic Research Program in Shaanxi Province, China (Grant No. 2020JQ-818 , No. 2021JQ-640 , and No. 2021JM-432 ), and the Key Scientific Research Program of Education Department of Shaanxi Province (Grant No. 21JY016 ).

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 155>

 

Accession number:20230713582633

Title:High sensitivity Fabry-P&eacute;rot interferometric magnetic sensor based on Fe<inf>3</inf>O<inf>4</inf>-doped PDMS composite thin film

Authors:Wang, Xingfeng (1, 2); Yang, Jianfeng (1) 

Author affiliation:(1) Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&rsquo;an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 101408, China 

Source title:Applied Physics Express

Abbreviated source title:Appl. Phys. Express

Volume:16

Issue:2

Issue date:February 2023

Publication year:2023

Article number:026501

Language:English

ISSN:18820778

E-ISSN:18820786

Document type:Journal article (JA)

Publisher:Institute of Physics

Abstract:<div data-language="eng" data-ev-field="abstract">A magnetic field sensor based on Fabry-P&eacute;rot interferometer (FPI) with soft gold magnetic composite film (GMCF) is proposed and demonstrated experimentally. GMCF is fabricated by Fe<inf>3</inf>O<inf>4</inf>-doped polydimethylsiloxane (PDMS) film and adhered thin gold membrane via van der Waals force. Applying an external magnetic field, GMCF can vibrate under magnetic forces and cause a change in the cavity length of FPI and hence modulates the interference spectra. Experimental results indicate that the sensor can achieve maximum sensitivity of 390 pm mT^&minus;1 under a linear magnetic field intensity ranging from 0 to 65 mT. The proposed sensor could help with magnetic field detection in complex environments.<br/></div> &copy; 2023 The Japan Society of Applied Physics.

Number of references:28

Main heading:Magnetite

Controlled terms:Composite films - Fabry-Perot interferometers - Fiber optic sensors - Gold - Magnetic field measurement - Magnetic fields - Magnetic sensors - Microchannels - Polydimethylsiloxane - Silicones  - Thin films - Van der Waals forces

Uncontrolled terms:Composite thin films - Fabry-Perot - Fibre-optic sensor - High sensitivity - Interferometrics - Magnetic composites - Magnetic fields measurements - Magnetic fields sensors - Soft gold magnetic composite film - Van der waals' forces

Classification code:547.1  Precious Metals - 701.2  Magnetism: Basic Concepts and Phenomena - 741.1.2  Fiber Optics - 801.4  Physical Chemistry - 815.1.1  Organic Polymers - 931.3  Atomic and Molecular Physics - 941.3  Optical Instruments - 942.4  Magnetic Variables Measurements

Numerical data indexing:Magnetic flux density 0.00E00T to 6.50E-02T, Size 3.90E-10m

DOI:10.35848/1882-0786/acb3af

Funding details:  Number: XDA15320102, Acronym: CAS, Sponsor: Chinese Academy of Sciences;

Funding text:This work was supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (XDA15320102).

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 156>

 

Accession number:20232114126750

Title:Optical passive athermalization design of a catadioptric infrared optical system with large aperture and long focal length

Authors:Cui, Wen (1, 2); Yan, Aqi (1); Mei, Chao (1); Chen, Weining (1) 

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

Corresponding author:Yan, Aqi(yanaqi@opt.ac.cn)

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:12565

Part number:1 of 1

Issue title:Conference on Infrared, Millimeter, Terahertz Waves and Applications, IMT 2022

Issue date:2023

Publication year:2023

Article number:1256505

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510662476

Document type:Conference article (CA)

Conference name:2022 Conference on Infrared, Millimeter, Terahertz Waves and Applications, IMT 2022

Conference date:September 20, 2022  -  September 22, 2022

Conference location:Xi'an, China

Conference code:188255

Sponsor:Chinese Society for Optical Engineering (CSOE)

Publisher:SPIE

Abstract:<div data-language="eng" data-ev-field="abstract">In view of the problem that the imaging quality of the large-aperture and long-focal length infrared optical system is sensitive to temperature changes.In this paper, we propose an idea of combining athermalization design with catadioptric optical system, and a large-aperture long-focal length catadioptric infrared optical system is designed by this idea.According to the influence of each parameter by environmental changes, the system optical power is allocated reasonably.Select the appropriate infrared lens material and reflector base material for the system so that the image plane deviation caused by the environmental changes of the components cancel each other out.The design method and idea proposed in this paper have important reference value for the realization of heat dissipation of catadioptric optical system.The working band of the system is 8~14&mu;&#8575;, the focal length is 250&#8575;&#8575;, F-number is 1, and the three infrared materials used in the system are HWS2, HWS9 and IRG22.The design results show that the system can maintain high imaging quality in the temperature range of -40&#8451;~+60&#8451;, with the modulation transfer function(MTF)curves close to the diffraction limit at the cutoff frequency.The design methods and ideas proposed in this paper have significant reference value for realizing athermalization of catadioptric optical systems.<br/></div> &copy; 2023 SPIE.

Number of references:11

Main heading:Optical systems

Controlled terms:Cutoff frequency - Design - Diffraction - Infrared radiation - Optical transfer function

Uncontrolled terms:Catadioptirc - Catadioptrics - Infrared optical systems - Large aperture - LWIR - Optical passive athermalization - Optical system designs - Optical- - Passive athermalization - Uncooled

Classification code:741.1  Light/Optics - 741.3  Optical Devices and Systems

DOI:10.1117/12.2661520

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 157>

 

Accession number:20230813609899

Title:Detection method of sidelobe peaks parameter for far-field measurement based on the diffraction inversion of sidelobe beam

Title of translation:&#22522;&#20110;&#26049;&#29923;&#20809;&#26463;&#34893;&#23556;&#21453;&#28436;&#30340;&#36828;&#22330;&#27979;&#37327;&#26049;&#29923;&#27874;&#23792;&#21442;&#25968;&#26816;&#27979;&#26041;&#27861;

Authors:Wang, Zhengzhou (1); Duan, Yaxuan (1); Wang, Li (1); Li, Gang (1); Guo, Jiafu (1, 2) 

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

Corresponding author:Duan, Yaxuan

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

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

Volume:52

Issue:1

Issue date:January 2023

Publication year:2023

Article number:20220281

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics

Abstract:<div data-language="eng" data-ev-field="abstract">In order to solve the problem that high power laser far-field measurement can not effectively identify the parameters of each sidelobe peak in any direction of sidelobe beam, a detection method of sidelobe peak parameters of far-field measurement based on sidelobe beam diffraction inversion is proposed in this paper. The main idea is to quantify the sidelobe beam image according to a specific angle sampling interval, and convert the two-dimensional sidelobe beam image into a set of one-dimensional sidelobe beam curves in all directions by angle transformation, then detect the parameters of each sidelobe peak of one-dimensional sidelobe beam curve at each angle, so as to obtain the parameters of each sidelobe peak in any direction of sidelobe beam. The main optimization measures are as follows: (1) Convert the two-dimensional sidelobe beam image into a set of one-dimensional sidelobe beam curves in all directions by angle transformation; (2) Detect the parameters of each sidelobe peak of one-dimensional sidelobe beam curve at each angle, count each sidelobe peak in all directions, and generate the maximum rings of each sidelobe peak; (3) Count the gray mean values of the maximum rings of each sidelobe peak, compare the gray mean values of the maximum rings of each sidelobe peak with the background noise, and select the minimum peak mean value greater than 1.5 times the background noise as the minimum measurable sidelobe peak signal of the whole sidelobe beam. The experimental results show that this method can effectively detect the parameters of each sidelobe peak in any direction of the sidelobe beam. The error between the mean value of gray maximum value and the theoretical value of gray maximum value in any direction is 0.477, and the error between the mean value of the maximum ring radius and the radius of the theoretical value of 5 sidelobe peaks is less than 1 pixel. This method improves the experimental accuracy and reliability of far-field measurement of high power laser based on the diffraction inversion of sidelobe beam, and it will lay a foundation for the accurate measurement of the far field of the high power laser in the large scientific facility in the future.<br/></div> &copy; 2023 Chinese Society of Astronautics. All rights reserved.

Number of references:19

Main heading:High power lasers

Controlled terms:Curve fitting - Diffraction - Parameter estimation

Uncontrolled terms:Angle transformation - Diffraction inversion of sidelobe beam - Far field measurement - Mean values - One-dimensional - Parameter detection - Parameter detection of sidelobe peak - Schlieren method - Side lobes

Classification code:744.1  Lasers, General - 921.6  Numerical Methods

DOI:10.3788/IRLA20220281

 

Database:Compendex

Compilation and indexing terms, Copyright 2023 Elsevier Inc.

 

<RECORD 158>

 

Accession number:20220511582672