Record 1 of 109

Title: Dissipative soliton operation of a diode-pumped Yb: KGW solid-state laser in the all-positive-dispersion regime

Author(s): Li, GY (Li, Guangying); Lou, R (Lou, Rui); Wang, X (Wang, Xu); Sun, Z (Sun, Zhe); Wang, YS (Wang, Yishan); Xie, XP (Xie, Xiaoping); Zhang, GD (Zhang, Guodong); Cheng, GH (Cheng, Guanghua)

Source: OPTICAL ENGINEERING  Volume: 59  Issue: 6  Article Number: 066105  DOI: 10.1117/1.OE.59.6.066105  Published: JUN 2020  

Abstract: We report on the dissipative soliton operation of a diode-pumped single-crystal bulk Yb:KGW laser oscillator in the all-positive-dispersion regime. Stable passively mode-locked pulses with strong positive chirp and steep spectral edges are obtained. The spectral centering at 1038.6 nm has a bandwidth of about 6.9 nm, and the chirped pulses have a pulse duration of 4.317 ps. The maximum average power can be up to 2.07 W when pumped by absorbed pump power of 5.3 W. The mode-locked slope efficiency and optical-optical conversion efficiency are shown to be 62% and 39%, respectively. Considering the pulse repetition rate with a value of 52 MHz, the corresponding pulse energy is estimated to be 39.8 nJ. (C) 2020 Society of Photo-Optical Instrumentation Engineers (SPIE)

Accession Number: WOS:000546929000051

Conference Title: Annual International Saratov Fall Meeting (SFM)

Conference Date: SEP 23-27, 2019

Conference Location: Saratov, RUSSIA

Conference Sponsors: Saratov State Univ, Bauman Moscow State Tech Univ

Author Identifiers:

ISSN: 0091-3286

eISSN: 1560-2303

Record 2 of 109

Title: Transparent and hydrophobic hexylene-bridged polymethylsiloxane/sio₂ composite coating with tunable refractive index and its application for broadband antireflection

Author(s): Zhang, C (Zhang, Ce); Xu, Y (Xu, Yao)

Source: THIN SOLID FILMS  Volume: 701  Article Number: 137944  DOI: 10.1016/j.tsf.2020.137944  Published: MAY 1 2020  

Abstract: Regulating refractive index over a wide range plays a key role in the design and fabrication of broadband antireflective coating in many optical energy-related fields. In this paper, hydrophobic refractive-tunable coating was fabricated from an effective solution mixing method starting from a synthesis solution of silica (SiO2) nanoparticles which was developed for dispersing nanoparticles into dense hexylene-bridged polymethylsiloxane polymer. In the mixing process, the microstructure and chemical structure of hexylene-bridged polymethylsiloxane/SiO2 were analyzed by fourier transform-infrared spectrometer and transmission electron microscope. Specially, the relationship between the microstructure and optical properties was also well investigated. Silica nanoparticles were dispersed homogeneously in polymer matrix modulating the refractive index of composite coating ranging from 1.16 to 1.47. When the composite coating with refractive index of 1.36 was used as the bottom layer and hexamethyldisilazane modified SiO2 coating with refractive index of 1.16 was used as the top layer. Thus-obtained double-layer broadband antireflective coating was fabricated with excellent broadband antireflective performance. In addition, the double-layer broadband silica antireflective coating showed good environmental stability. This work provides an alternative way to prepare a broadband antireflective coating for some applications in energy harvesting and optical devices.

Accession Number: WOS:000525745900022

Conference Title: 46th International Conference on Metallurgical Coatings and Thin Films (ICMCTF)

Conference Date: MAY 19-24, 2019

Conference Location: San Diego, CA

ISSN: 0040-6090

eISSN: 1879-2731

Record 3 of 109

Title: Simulation of magnetic field effects on the MCP gain

Author(s): Li, L (Li, L.); Guo, L (Guo, L.); Wei, Y (Wei, Y.); Sai, X (Sai, X.); Liu, H (Liu, H.); He, K (He, K.); Gou, Y (Gou, Y.); Liu, B (Liu, B.); Tian, J (Tian, J.); Chen, P (Chen, P.)

Source: JOURNAL OF INSTRUMENTATION  Volume: 15  Issue: 3  Article Number: C03048  DOI: 10.1088/1748-0221/15/03/C03048  Published: MAR 2020  

Abstract: A multi-anode microchannel plate photomultiplier (Ma MCP-PMT) is an appropriate photo sensor for particle identification in high energy physics experiments such as PANDA, Belle II, etc. Since these detectors usually work in a strong magnetic field, the sensors must be immune to the field. In this article, the effects of the magnetic field on the conventional MCP and the atomic layer deposited MCP (ALD-MCP) are studied by simulating the electron multiplication in the microchannel of the MCP. Simulation results show that the gain of conventional MCP-PMTs increases a little before it starts decreasing while the magnetic field is further increasing. We found that the shortening of electronic trajectories and the reduction of secondary electrons mainly contribute to gain variations of a conventional MCP. For the ALD-MCP that usually has higher secondary emission yields, it is found that high re-diffusion secondary electron yields could make it more vulnerable to magnetic fields.

Accession Number: WOS:000528039600048

Conference Title: International Workshop on Fast Cherenkov Detectors - Photon Detection, DIRC Design and DAQ

Conference Date: SEP 11-13, 2019

Conference Location: Giessen, GERMANY

Author Identifiers:

ISSN: 1748-0221

Record 4 of 109

Title: Broadband Microwave Frequency Conversion Based on an Integrated Optical Micro-Comb Source

Author(s): Xu, XY (Xu, Xingyuan); Wu, JY (Wu, Jiayang); Tan, MX (Tan, Mengxi); Nguyen, TG (Nguyen, Thach G.); Chu, ST (Chu, Sai T.); Little, BE (Little, Brent E.); Morandotti, R (Morandotti, Roberto); Mitchell, A (Mitchell, Arnan); Moss, DJ (Moss, David J.)

Source: JOURNAL OF LIGHTWAVE TECHNOLOGY  Volume: 38  Issue: 2  Pages: 332-338  DOI: 10.1109/JLT.2019.2930466  Published: JAN 15 2020  

Abstract: We report a broadband microwave frequency converter based on a coherent Kerr optical micro-comb generated by an integrated micro-ring resonator. The coherent micro-comb displays features that are consistent with soliton crystal dynamics with a free spectral range of 48.9 GHz. We use this to demonstrate a high-performance millimeter-wave local oscillator for microwave frequency conversion. We experimentally verify the microwave performance up to 40 GHz, achieving a ratio of 6.8 dB between output radio frequency power and intermediate frequency power and a spurious suppression ratio of >43.5 dB. The experimental results show good agreement with theory and verify the effectiveness of microwave frequency converters based on coherent optical micro-combs, with the ability to achieve reduced size, complexity, and potential cost.

Accession Number: WOS:000510911600019

Conference Title: Optical Fiber Communications Conference and Exhibition (OFC)

Conference Date: MAR 03-07, 2019

Conference Location: San Diego, CA

Conference Sponsors: IEEE, 3M, AC Photon Inc, Acacia Commun Inc, AIM Photon, Alibaba Grp, APAC Opto, Cadence, Ciena, ColorChip, Corning, European Patent Off, GoFoton, Huawei, HYC Co Ltd, Infinera, Inno Instrument, Intel, Juniper Networks, Ligentec, Menara Networks, Nextrom, NTT Elect, Optomind, OZ Opt Online, Prysmian Grp, Samtec, Santec, Sanwa, Sumitomo Elect, Synopsys, Tektronix, VeEX, VPI Photon, XFS, XILINX, YOFC, ZEUS

Author Identifiers:

ISSN: 0733-8724

eISSN: 1558-2213

Record 5 of 109

Title: Research on the Calibration Technique of the Low-Light-Level Remote Sensing Camera

Author(s): Bai, Z (Bai, Zhe); Ma, YL (Ma, Yilong); Pan, Y (Pan, Yue); Pang, ZH (Pang, Zhihai); Zhao, H (Zhao, Hui)

Edited by: Luo X; Jiang Y; Lu J; Liu D

Source: AOPC 2020: OPTICAL SENSING AND IMAGING TECHNOLOGY  Book Series: Proceedings of SPIE  Volume: 11567  Article Number: 115673O  DOI: 10.1117/12.2580218  Published: 2020  

Abstract: In recent years, Low-Light-Level (LLL) remote-sensing camera has become a novel subject for the development of aerospace optical remote-sensing payloads. LLL remote sensing camera works in ultra-low light conditions, the image signal is very weak and requires image intensified technology to achieve. In order to make better use of LLL remote sensing data, it is necessary to establish the quantitative relationship between the amount of radiation received by the camera and the digital signal output to process the image. That's radiation calibration technology. Therefore, the radiation calibration of the LLL remote sensing camera is particularly important. In this article, first the requirements for calibration of LLL remote sensing cameras are analyzed in theory. After that, a radiation calibration scheme of the LLL remote sensing camera is put forward. Finally, the radiation calibration test is carried out, and the calibration data are analyzed. The results show that the calibration scheme of LLL remote sensing camera is reasonable and feasible.

Accession Number: WOS:000651815600131

Conference Title: Applied Optics and Photonics China (AOPC) Conference - Optical Sensing and Imaging Technology

Conference Date: AUG 25-27, 2020

Conference Location: Xiamen, PEOPLES R CHINA

Conference Sponsors: Chinese Soc Opt Engn, SPIE, Acad Opto Elect Elect Technol China, Sci & Technol Low Light Level Night Vis Lab, Sci & Technol Electro Opt Informat Secur Control

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-3956-0

Record 6 of 109

Title: Calculation and Analysis of Flexibility Matrix for V Flexible spherical Hinges with Chamfer

Author(s): Bao, CN (Bao Chaonan); Jiang, B (Jiang Bo)

Book Group Author(s): IEEE

Source: 2020 5TH INTERNATIONAL CONFERENCE ON ELECTROMECHANICAL CONTROL TECHNOLOGY AND TRANSPORTATION (ICECTT 2020)  Pages: 97-101  DOI: 10.1109/ICECTT50890.2020.00029  Published: 2020  

Abstract: A new type of chamfering V flexible spherical hinge is designed. Based on the second theorem and calculus theory of material mechanics, the formula of flexibility matrix of chamfering flexible spherical hinge is deduced by energy method, and an example is used to verify the results in finite element method. The error between theoretical solution and finite element solution is less than 10%, which verifies its correctness. The structural parameters affecting the flexibility are analyzed, and it is concluded that the flexibility increases with the length of the flexible spherical hinge or the chamfer radius R, but decreases with the increase of the minimum thickness and the angle between V type and x axis. And the change of the minimum thickness has the most obvious influence on the flexibility.

Accession Number: WOS:000630470800022

Conference Title: 5th International Conference on Electromechanical Control Technology and Transportation (ICECTT)

Conference Date: MAY 15-17, 2020

Conference Location: ELECTR NETWORK

Conference Sponsors: AEIC Acad Exchange Informat Ctr

ISBN: 978-1-7281-9928-3

Record 7 of 109

Title: Research and application of spectral reconstruction technology based on periodic structure

Author(s): Bin, L (Bin, Liu); Yi, WR (Yi, Wei Ru); Shi, SY (Shi, Shi Yi); Lei, S (Lei, Shi); Kun, ZZ (Kun, Zhang Zai); Rong, Z (Rong, Zhao Lv); Ming, ZX (Ming, Zhang Xin)

Edited by: Luo X; Jiang Y; Lu J; Liu D

Source: AOPC 2020: OPTICAL SENSING AND IMAGING TECHNOLOGY  Book Series: Proceedings of SPIE  Volume: 11567  Article Number: 115671R  DOI: 10.1117/12.2579501  Published: 2020  

Abstract: With the progress of science and the development of society, the study of material composition becomes more and more important, and the identification of material composition is mainly to distinguish the spectral information of different substances. Spectrometer is an important optical instrument, which combines the optical method with modern electronic data processing technology, and accurately analyzes the structure, composition and content of the target substance by obtaining its spectral information. At present, it has been widely used in some important scientific fields such as field exploration, material detection and space- borne analysis. In this paper, a new type of spectrometer based on periodic array structure is proposed. The spectrometer modulates the phase of the incident light by using the small hole array structure with the diameter of sub-wavelength. By using the diffraction effect of light, the light intensity distribution of the incident light is directly recorded by Charge Coupled Device(CCD)according to different wavelengths. After passing through the diffraction aperture array, the light intensity distribution is recorded again, and the transmittance coefficients of the diffraction aperture array for different wavelengths are obtained respectively. Finally, the transmittance matrix of diffraction aperture array for incident light is obtained, and the spectral curves of different incident light can be obtained by data processing algorithm according to the transmittance matrix. The main optical device of the spectrometer is diffraction aperture array, which is a metal film coated on a transparent substrate made of resin material. A series of aperture arrays with diameters of 2-78 microns and 10x10 are processed on the metal film by micro-nano processing technology. Any aperture has different diameters, and the apertures are periodically arranged on the metal film. By using diffraction effect, the incident light with different wavelengths will produce different light intensity distribution on CCD. Combined with data processing method, the incident light can be obtained. Compared with the traditional spectrometer, the new spectrometer has no moving parts in the system, which improves its stability, and has the characteristics of fast data processing, small size, low cost and high spectral resolution. In this paper, the theoretical analysis, simulation and experimental verification of the new spectrometer are carried out. The results show that the new spectrometer has obvious advantages compared with the traditional spectrometer and has broad application prospects.

Accession Number: WOS:000651815600062

Conference Title: Applied Optics and Photonics China (AOPC) Conference - Optical Sensing and Imaging Technology

Conference Date: AUG 25-27, 2020

Conference Location: Xiamen, PEOPLES R CHINA

Conference Sponsors: Chinese Soc Opt Engn, SPIE, Acad Opto Elect Elect Technol China, Sci & Technol Low Light Level Night Vis Lab, Sci & Technol Electro Opt Informat Secur Control

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-3956-0

Record 8 of 109

Title: Laser written 3D 3T spectro-interferometer: Study and optimisation of the laser-written nano-antenna

Author(s): Bonduelle, M (Bonduelle, Myriam); Martin, G (Martin, Guillermo); Perez, IH (Perez, Irene Heras); Morand, A (Morand, Alain); d'Amico, C (d'Amico, Ciro); Stoian, R (Stoian, Razvan); Zhang, GD (Zhang, Guodong); Cheng, GH (Cheng, Guanghua)

Edited by: Tuthill PG; Merand A; Sallum S

Source: OPTICAL AND INFRARED INTERFEROMETRY AND IMAGING VII  Book Series: Proceedings of SPIE  Volume: 11446  Article Number: 114462T  DOI: 10.1117/12.2562179  Published: 2020  

Abstract: Stationary Wave Integrated Fourier Transform Spectrometers (SWIFTS) are based on the sampling of a stationary wave using nano-sampling centres on the surface of a channel waveguide. Single nanogroove sampling centres above the waveguide surface will radiate the sampled signal with wide angular distribution, which is not compatible with the buried detection area of infrared detectors, resulting in crosstalk between pixels. An implementation of multiple diffraction nano-grooves (antenna) for each sampling position is proposed as an alternative solution to improve directivity towards the detector pixel by narrowing the scattering angle of the extracted light. Its efficiency is demonstrated from both simulated and measured far field radiative patterns exhibiting a promising method to be used for future integrated IR-SWIFTS.
The implementation of the antennas will allow for a high resolution spectrometer in Infra-Red (here 1550nm) with no crosstalk problem (ref. [1]). These antennas, combined with the technology used (direct laser writing) will provide a robust, low-cost efficient tool that can be implemented as a 3D-3T spectro-interferometer (multi telescope beam-combiner), useful for astrophysics applications, such as phase closure studies.

Accession Number: WOS:000853981100053

Conference Title: Conference on Optical and Infrared Interferometry and Imaging VII

Conference Date: DEC 14-22, 2020

Conference Location: ELECTR NETWORK

Conference Sponsors: SPIE

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-3680-4

Record 9 of 109

Title: Research on High Precision Permanent Magnet Servo Control System of Airborne Stable Platform

Author(s): Cao, Y (Cao Yu); Su, XQ (Su Xiuqin); Wang, HT (Wang Haitao); Xie, ML (Xie Meilin); Jing, F (Jing Feng); Han, JF (Han Junfeng); Liu, P (Liu Peng)

Edited by: Xu B; Mou K

Source: PROCEEDINGS OF 2020 IEEE 5TH INFORMATION TECHNOLOGY AND MECHATRONICS ENGINEERING CONFERENCE (ITOEC 2020)  Pages: 413-416  Published: 2020  

Abstract: At present, airborne optoelectronic pod system develops rapidly and is widely used in military and civil fields. The stable platform control system is the key part of the photoelectric pod, which is used to isolate the disturbance of the body and the external environment, maintain the stability of the LOS and ensure the clear imaging of the sensor. In general, the model of airborne electro-optical stabilization platform can not be obtained accurately, and the characteristics of the system itself are affected by the external environment. At the same time, the noise interference such as torque and sensor actuator is also uncertain. In order to solve the above-mentioned uncertainty and improve the stability accuracy of the system, this paper takes the servo system of a two axis airborne photoelectric stability platform as the research object, uses SVPWM technology to complete the hardware and software design with DSP + FPGA as the control core, uses FOG and POS as speed and position sensors. And it aims at mechanical resonance, to design a digital notch filter to restrain it. Finally, the experiment shows that when the swing amplitude is 8.5 degrees, frequency is 0.3Hz, the stability accuracy reaches 0.005 degrees (3 sigma). The experiment shows that the stable platform control system has the advantages of fast response speed and high stability accuracy.

Accession Number: WOS:000617764100079

Conference Title: IEEE 5th Information Technology and Mechatronics Engineering Conference (ITOEC)

Conference Date: JUN 12-14, 2020

Conference Location: ELECTR NETWORK

Conference Sponsors: IEEE, GUAST

ISBN: 978-1-7281-4323-1; 978-1-7281-4322-4

Record 10 of 109

Title: Ultrafast soliton dynamics of micro-combs observed by aberration-free temporal magnifier

Author(s): Chen, L (Chen, Liao); Zhao, YJ (Zhao, Yanjing); Wang, WQ (Wang, Weiqiang); Hu, H (Hu, Hao); Wang, RL (Wang, Ruolan); Wang, XY (Wang, Xinyu); Chu, ST (Chu, Sai T.); Little, B (Little, Brent); Zhang, C (Zhang, Chi); Zhang, WF (Zhang, Wenfu); Zhang, XL (Zhang, Xinliang)

Book Group Author(s): IEEE

Source: 2020 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)  Book Series: Conference on Lasers and Electro-Optics  Published: 2020  

Abstract: Ultra-fast soliton dynamics of micro-combs are investigated based on an aberration-free temporal magnifier. By eliminating aberrations, temporal window is greatly extended to 1.4 ns and transient phenomena are clearly observed including soliton annihilation and mergence. (C) 2020 The Author(s)

Accession Number: WOS:000612090000268

Conference Title: Conference on Lasers and Electro-Optics (CLEO)

Conference Date: MAY 10-15, 2020

Conference Location: San Jose, CA

Conference Sponsors: IEEE

Author Identifiers:

ISSN: 2160-9020

ISBN: 978-1-943580-76-7

Record 11 of 109

Title: RESTORATION OF SPARSE MULTISPECTRAL SINGLE PHOTON LIDAR DATA

Author(s): Chen, SM (Chen, Songmao); Hao, W (Hao, Wei); Su, XQ (Su, Xiuqin); Zhang, ZY (Zhang, Zhenyang); Wang, SC (Wang, Shuchao); Zhu, WH (Zhu, Wenhua)

Book Group Author(s): IEEE

Source: 2020 IEEE INTERNATIONAL CONFERENCE ON SIGNAL PROCESSING, COMMUNICATIONS AND COMPUTING (IEEE ICSPCC 2020)  Published: 2020  

Abstract: This paper presents a new algorithm to restore the sparse multispectral data acquired by single photon LiDAR. Regarding to its sparsity, the robustness of depth estimation is improved by exploiting the correlations between wavelengths and multi-scale information. Furthermore, the non-local spatial correlations between pixels/patches are learned by the affinity graph and used as prior information to prompt the smoothness for both depth and reflectivity images. To reduce the computational cost, a non-uniform sampling algorithm and clustering strategy are adopted, where flexible sampling points were assigned to reduce the size of the graph while minimizing the loss in details and different spatial clusters can be processed in parallel. Finally, the restoration was achieved by optimizing a cost function which account for both multi-scale information and non-local spatial correlations. The cost function is efficiently solved by ADMM algorithm that present fast convergence. Results on simulated data showed the benefits of the proposed algorithm by comparing with state-of-the-art algorithms, and the fast computation justified the supreme performance.

Accession Number: WOS:000651422600041

Conference Title: 10th IEEE International Conference on Signal Processing, Communications and Computing (IEEE ICSPCC)

Conference Date: AUG 21-23, 2020

Conference Location: Univ Macau, Macau, PEOPLES R CHINA

Conference Sponsors: IEEE, IEEE Xian Sect, IEEE Hong Kong Sect, IEEE ComSoc Chapter, NW Polytechn Univ

Conference Host: Univ Macau

ISBN: 978-1-7281-7201-9

Record 12 of 109

Title: Research on Influencing Factors of Natural Frequency of Shafting

Author(s): Chen, XD (Chen Xiaodong); Xie, YJ (Xie Youjin); Li, ZG (Li Zhiguo); Hao, W (Hao Wei); Gao, X (Gao Xiong)

Edited by: Xue S; Zhang Z

Source: AOPC 2020: TELESCOPES, SPACE OPTICS, AND INSTRUMENTATION  Book Series: Proceedings of SPIE  Volume: 11570  Article Number: 115700F  DOI: 10.1117/12.2579508  Published: 2020  

Abstract: Solar Array Drive Assembly(SADA) is a core component of high-power and long-life satellites, and the shafting is an important part of SADA. Its vibration characteristics analysis is very important in structural design and dynamic analysis. The paper theoretically derived and calculated the natural frequency of the shaft system under the action of bearing preload and span, and established a corresponding finite element simulation model in ANSYS. It is concluded that the natural frequency of the shafting increases with the increase of the bearing preload and the span, and the influence of the bearing span is more significant.

Accession Number: WOS:000651810100014

Conference Title: 9th Conference on Applied Optics and Photonics China (AOPC) - Telescopes, Space Optics, and Instrumentation

Conference Date: NOV 30-DEC 02, 2020

Conference Location: Beijing, PEOPLES R CHINA

Conference Sponsors: SPIE, Chinese Soc Opt Engn, Acad Opto Elect Elect Technol China, Sci & Technol Low Light Level Night Vis Lab, Sci & Technol Electro Opt Informat Secur Control Lab

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-3962-1

Record 13 of 109

Title: HYPERSPECTRAL TARGET DETECTION VIA MULTIPLE INSTANCE LSTM TARGET LOCALIZATION NETWORK

Author(s): Chen, XY (Chen, Xiaoying); Wang, XX (Wang, Xiuxiu); Guo, CB (Guo, Chubing); Chen, C (Chen, Chao); Gou, SP (Gou, Shuiping); Yu, T (Yu, Tao); Jiao, CZ (Jiao, Changzhe)

Book Group Author(s): IEEE

Source: IGARSS 2020 - 2020 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM  Book Series: IEEE International Symposium on Geoscience and Remote Sensing IGARSS  Pages: 2436-2439  DOI: 10.1109/IGARSS39084.2020.9323997  Published: 2020  

Abstract: Modeling target detection problem given inaccurate annotations as a multiple instance learning (MIL) problem is an effective way for addressing the ground truth uncertainties of remotely sensed hyperspectral imagery. In this paper, we propose a hyperspectral target detection method based on 1D convolution neural network (1DCNN) feature extraction and long short term memory network (LSTM) under the MIL framework, where the LSTM features for each hyperspectral pixel is further refined by a scoring network as to discriminate the real target instance from the inaccurately labeled hyperspectral regions. The proposed method has achieved superior results on both simulated data and real hyperspectral data over the state-of-the-art methods, showing the prospects for further investigation.

Accession Number: WOS:000664335302115

Conference Title: IEEE International Geoscience and Remote Sensing Symposium (IGARSS)

Conference Date: SEP 26-OCT 02, 2020

Conference Location: ELECTR NETWORK

Conference Sponsors: Inst Elect & Elect Engineers, Inst Elect & Elect Engineers Geoscience & Remote Sensing Soc

Author Identifiers:

ISSN: 2153-6996

ISBN: 978-1-7281-6374-1

Record 14 of 109

Title: A color correction method in uniform color space

Author(s): Chu, NQ (Chu Nanqing); Li, XY (Li Xuyang); Yi, HW (Yi Hongwei); Ren, ZG (Ren Zhiguang); Ma, ZX (Ma Zixuan)

Edited by: Luo X; Jiang Y; Lu J; Liu D

Source: AOPC 2020: OPTICAL SENSING AND IMAGING TECHNOLOGY  Book Series: Proceedings of SPIE  Volume: 11567  Article Number: 1156741  DOI: 10.1117/12.2580277  Published: 2020  

Abstract: In the process of restoring the image of space optical camera, it is necessary to use the standard 24 color card to correct the image. In order to improve the accuracy of the mapping function in the process of color correction and prevent the occurrence of overfitting at the same time, a neural network correction method with comprehensive objective function is proposed. Using the idea of regularization as a reference, a constraint term with smooth performance is added to the objective function of the neural network to improve the generalization ability of the network map to data. The experimental results on the dataset of the real color card of the space camera sho-ore the correction.

Accession Number: WOS:000651815600144

Conference Title: Applied Optics and Photonics China (AOPC) Conference - Optical Sensing and Imaging Technology

Conference Date: AUG 25-27, 2020

Conference Location: Xiamen, PEOPLES R CHINA

Conference Sponsors: Chinese Soc Opt Engn, SPIE, Acad Opto Elect Elect Technol China, Sci & Technol Low Light Level Night Vis Lab, Sci & Technol Electro Opt Informat Secur Control

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-3956-0

Record 15 of 109

Title: Overcoming low-power limitations on optical frequency combs using a micro-ring resonator

Author(s): Corcoran, B (Corcoran, Bill); Prayoonyong, C (Prayoonyong, Chawaphon); Boes, A (Boes, Andreas); Xu, XY (Xu, Xingyuan); Tan, MX (Tan, Mengxi); Chu, ST (Chu, Sai T.); Little, BE (Little, Brent E.); Morandotti, R (Morandotti, Roberto); Mitchell, A (Mitchell, Arnan); Moss, DJ (Moss, David J.)

Book Group Author(s): IEEE

Source: 2020 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXPOSITION (OFC)  Published: 2020  

Abstract: We show that filtering of an optical frequency comb with a high quality-factor ring resonator enables the use of amplified low power combs as a multi-wavelength source. This approach improves effective source OSNR by 10 dB. (C) 2020 The Authors

Accession Number: WOS:000676346200042

Conference Title: Optical Fiber Communications Conference and Exposition (OFC)

Conference Date: MAR 08-12, 2020

Conference Location: San Diego, CA

Conference Sponsors: IEEE, Acphotonics, Acacia Commun Inc, Alibaba Grp, Ciena, Cisco, Corning, European Patent Off, Fibercore, Huawei, Hyc Co Ltd, Infinera, Innolight, Inphi, Juniper, Ligentec, Enara Networks, NTT Elect, OSA Ind Dev Associates, Oz Opt Online, Samtec, Santec, Sanwa, Senko, Sicoya, Synopsys, Thorlabs, Usconec, VeEx, Vertically Integrated Syst, VPLPhotonics, XFS, Xilinx

Author Identifiers:

ISBN: 978-1-9435-8071-2

Record 16 of 109

Title: Research on Flexible Structure of a Space Flight Prototype Doppler Asymmetric Spatial Heterodyne Interferometer

Author(s): Dang, JA (Dang, Jianan); Sun, J (Sun, Jian); Feng, YT (Feng, Yutao); Chang, CG (Chang, Chenguang); Wu, Y (Wu, Yang)

Edited by: Wang J; Zhou Z; Lu C; You L; Min C; Song H; Li G

Source: AOPC 2020: OPTOELECTRONICS AND NANOPHOTONICS; AND QUANTUM INFORMATION TECHNOLOGY  Book Series: Proceedings of SPIE  Volume: 11564  Article Number: 115640D  DOI: 10.1117/12.2580203  Published: 2020  

Abstract: As a new type of wind field detection technology, Doppler Asymmetric Spatial Heterodyne(DASH)can invert information such as atmospheric wind speed by monitoring the Doppler frequency shift of the absorption line or emission line of the atmospheric composition. It is widely used in the detection of middle and upper atmospheric wind fields. In this paper, a flexible support structure suitable for DASH interferometer is designed, so that the bonding process between different materials has a high safety margin in environmental testing. After modal analysis and random vibration analysis of the whole structure, the results show that the design meets the requirements. First, the fundamental frequency of the interferometer (765.79Hz>100Hz) meets the requirements of general satellites for the load; secondly, the random vibration analysis results show that the bonding stress between the surfaces is less than the allowable stress of the material (2MPa<14MPa), and it has a certain safety margin (> 2); finally, the optical parts and structural parts did not collide with the structural parts during the vibration process, and the flexible structure did not undergo plastic deformation, and the whole structure of the interferometer was safe and reliable.

Accession Number: WOS:000652014700012

Conference Title: Applied Optics and Photonics China (AOPC) Conference - Optoelectronics and Nanophotonics and Quantum Information Technology

Conference Date: NOV 30-DEC 02, 2020

Conference Location: Beijing, PEOPLES R CHINA

Conference Sponsors: SPIE, Chines Soc Opt Engn, Acad Opto Elect Elect Technol China, Sci & Technol Low Light Level Night Vis Lab, Sci & Technol Electro Opt Informat Secur Control

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-3950-8

Record 17 of 109

Title: Analysis of influence factors of surface defects detection on optical components

Author(s): Deng, MJ (Deng Mingjie); Shi, F (Shi Feng); Sun, GY (Sun Guoyan); Xue, S (Xue Shuai); Tie, GP (Tie Guipeng)

Edited by: Luo X; Jiang Y; Lu J; Liu D

Source: AOPC 2020: OPTICAL SENSING AND IMAGING TECHNOLOGY  Book Series: Proceedings of SPIE  Volume: 11567  Article Number: 1156704  DOI: 10.1117/12.2572696  Published: 2020  

Abstract: Most of the existing defect detectors focus on the size, location, depth and number of defects of the tested components. The instrument is usually large in size and requires high accuracy for the environment and motion devices. In contrast, the direct random bed motion, which aims at finding and locating defects, is highly efficient, low-cost and environmentally practical, while the research on vibration-resistant defect tester is rare.In order to solve this problem, based on the principle of micro-scattering imaging in dark field, a set of optical component surface defect detection device is built, and the influence factors of light intensity, illumination angle, wavelength and other defect detection factors are experimentally studied, in order to provide design basis for the follow-up development of on- line defect detection instrument. The experimental results show that the most important factor affecting the sensitivity is the azimuth angle and pitch angle of the incident light, which is more than 30 degrees between the incident light and the scratch direction. When the pitch angle is between 60 degrees and 70 degrees, the higher detection sensitivity can be obtained. In addition, improving the illumination intensity can help to improve the detection of defects. In the visible range, the wavelength has little effect on the sensitivity.

Accession Number: WOS:000651815600003

Conference Title: Applied Optics and Photonics China (AOPC) Conference - Optical Sensing and Imaging Technology

Conference Date: AUG 25-27, 2020

Conference Location: Xiamen, PEOPLES R CHINA

Conference Sponsors: Chinese Soc Opt Engn, SPIE, Acad Opto Elect Elect Technol China, Sci & Technol Low Light Level Night Vis Lab, Sci & Technol Electro Opt Informat Secur Control

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-3956-0

Record 18 of 109

Title: A Pothole Detection Method Based On 3D Point Cloud Segmentation

Author(s): Du, Y (Du, Ying); Zhou, ZF (Zhou, Zuofeng); Wu, QQ (Wu, Qingquan); Huang, HM (Huang, Huimin); Xu, MM (Xu, Mingming); Cao, JZ (Cao, Jianzhong); Hu, GL (Hu, Guoliang)

Edited by: Jiang X; Fujita H

Source: TWELFTH INTERNATIONAL CONFERENCE ON DIGITAL IMAGE PROCESSING (ICDIP 2020)  Book Series: Proceedings of SPIE  Volume: 11519  Article Number: 1151909  DOI: 10.1117/12.2573124  Published: 2020  

Abstract: Road potholes affect comfort, safety, traffic condition and vehicle stability. Accurately detecting these potholes is vital for assessing the degree of pavement distress and developing road maintenance plan accordingly. This paper proposes a simple and effective pothole detection method based on 3D point cloud segmentation. Using binocular stereo vision to acquire 3D point clouds, fitting the pavement plane and then eliminating it from the 3D point clouds of road scene, we could roughly extract the pothole. K-means clustering and region growing algorithms were adopted to extract the potholes precisely. The experimental results demonstrate that our proposed method has a very good segmentation effect on scenes involving plane and target object.

Accession Number: WOS:000589893500008

Conference Title: 12th International Conference on Digital Image Processing (ICDIP)

Conference Date: MAY 19-22, 2020

Conference Location: ELECTR NETWORK

Conference Sponsors: Int Assoc Comp Sci & Informat Technol

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-3846-4

Record 19 of 109

Title: Research on Measurement Optical Axis Eccentricity and Fitting Method of Aspheric Mirror

Author(s): Fu, XH (Fu Xi Hong); Li, S (Li Shuo); Xue, L (Xue Li); Kang, SF (Kang Shi-fa); Zheng, XK (Zheng Xiang-ke); Ma, NN (Ma Na-na); Dang, Q (Dang Qian)

Edited by: Zhu J; Xu K; Xiao H; Han S

Source: 2019 INTERNATIONAL CONFERENCE ON OPTICAL INSTRUMENTS AND TECHNOLOGY: OPTOELECTRONIC MEASUREMENT TECHNOLOGY AND SYSTEMS  Book Series: Proceedings of SPIE  Volume: 11439  Article Number: 114391O  DOI: 10.1117/12.2550273  Published: 2020  

Abstract: A method to measurement of optical axis eccentricity and fitting about the aspheric mirror with the high-precision three-coordinate measuring machine(CMM) is presented. By establishing 2d/3d measurement coordinate system, The axis of fitting of the cylinder is selected according to the machining and assembly reference of aspheric mirror, Generating a number of concentric circles automatic measurement strategies, And make the points on each equal circumference, The probe head of the CMM is sampled on the surface of the measured aspheric mirror according to the measured strategy path to obtain the point coordinates of the distance of the reference axis, the measured surface is fitted to obtain the eccentricity of the aspheric mirror optical axis. Hyperboloid concave mirror to make use of the proposed method in the practical testing, the results show the actual processing of eccentricity is 0.0190mm, the standard deviation of 3.6x10(-4) mm, to meet the requirements of the design of eccentricity is less than or equal to 0.02mm.And testing the high precision centering lathe cutting machine frame fixed axis aspheric reflector components, the data indicators meet the requirements of assembly process. The accuracy of this method is high, and the traditional measuring method is easy to be affected by the precision of the tooling and easy to scratch the mirror. With large work surface, large caliber, back light weight loss (special-shaped structure) of aspheric mirrors optical axis eccentricity detection, not only suitable for different aperture aspheric mirrors the processing quality of qualified determination, but also in the machining, high precision of aspheric mirrors system with adjustable guiding role and effectively promote R-C spherical reflector optical system assembly accuracy and efficiency.

Accession Number: WOS:000558337500058

Conference Title: International Conference on Optical Instruments and Technology (OIT) - Optoelectronic Measurement Technology and Systems

Conference Date: OCT 26-28, 2019

Conference Location: Beijing, PEOPLES R CHINA

Conference Sponsors: China Instrument & Control Soc, SPIE

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-3657-6

Record 20 of 109

Title: Research on Technology of Measuring and Correcting the Optical Axis Deviation of High-order Aspheric Lens

Author(s): Fu, XH (Fu Xihong); Kang, SF (Kang Shifa); Lei, Y (Lei Yu); Li, H (Li Hua); Wang, P (Wang Peng); Ma, NN (Ma Nana); Dang, Q (Dang Qian)

Edited by: Kong L; Zhang D; Luo X

Source: AOPC 2020: OPTICS ULTRA PRECISION MANUFACTURING AND TESTING  Book Series: Proceedings of SPIE  Volume: 11568  Article Number: 1156806  DOI: 10.1117/12.2574922  Published: 2020  

Abstract: On the basis of optical theory, the mathematical model of axisymmetric high-order aspherical curve and the curve characteristic parameters related to the locus of aspherical surface are summarized. The non-contact precise measurement and correction of the central deviation of axisymmetric high-order aspherical lens based on autocollimated centering principle and spectral confocal displacement sensing technology are introduced. The methods of measuring the center deviation of aspheric lens with concave and convex surfaces are given.The aspheric measuring device of Trioptics double optical path center deviation measuring instrument is used to measure the axisymmetric high-order aspheric lens,Through several measurements and modifications, the final results meet the requirements of the whole optical system for the optical axis deviation of the axisymmetric high-order aspheric lens.The technology of measuring and correcting the center deviation of high-order aspheric lens with axial symmetry introduced in the paper has high non-contact measuring accuracy, which can guide the adjustment amount and position direction of the coincidence of the axis of symmetry and the axis of mechanical rotation of aspheric lens. It can be widely used in the process of on-line processing, testing and systematic adjustment of aspheric lens and aspheric mirror with different apertures.While ensuring the accuracy of aspheric surface, it can improve the quality of finish grinding process, save a lot of time for polishing process, and play a guiding role in its processing and manufacturing process and high-precision system installation, so as to greatly improve the processing efficiency of axisymmetric high-order aspheric surface and the final optical system installation and adjustment accuracy.

Accession Number: WOS:000616198900005

Conference Title: Applied Optics and Photonics China (AOPC) Conference - Optics Ultra Precision Manufacturing and Testing

Conference Date: JUN 29-30, 2020

Conference Location: Shanghai, PEOPLES R CHINA

Conference Sponsors: Chinese Soc Opt Engn, SPIE, Fudan Univ, Shanghai Engn Res Ctr Ultra Precis Opt Mfg, Shanghai Engn Res Ctr Extreme Opt Mfg & Measurement

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-3958-4

Record 21 of 109

Title: An Anomaly Detection Algorithm for Hyperspectral Imagery based on Graph Laplacian

Author(s): Gan, YQ (Gan Yuquan); Liu, Y (Liu Ying); Yang, FC (Yang Fanchao)

Edited by: Liu J; Wang Y; Ling Z; Sun Y; Jin D

Source: AOPC 2020: OPTICAL SPECTROSCOPY AND IMAGING; AND BIOMEDICAL OPTICS  Book Series: Proceedings of SPIE  Volume: 11566  Article Number: 1156608  DOI: 10.1117/12.2575009  Published: 2020  

Abstract: Traditional anomaly detection algorithms for hyperspectral imagery does not consider spatial information of imagery, which decreases detection efficiency of anomaly detection. The traditional RXD algorithm uses Gauss model to evaluate the distribution of background, but ignores spatial correlation of the imagery. Aiming at improving detection efficiency, this paper proposed an anomaly detection algorithm which utilize both spatial and spectral information of hyperspectral imagery based on graph Laplacian. In this paper, an anomaly detection algorithm for hyperspectral imagery based on graph Laplacian (Graph Laplacian Anomaly Detection with Mahalanobis distance, LADM) is presented. The spatial information is considered in the model by graph Laplacian matrix. First, LADM considers not only spectral information but also the spatial information by mapping image to a graph. Secondly, a symmetrical normalization Laplacian matrix is constructed for the graph with Mahalanobis distance. The operation eliminates interference among the nodes, which improves the accuracy of Laplacian matrix and improves the detection result. Thirdly, LADM detectors is constructed with graph Laplacian detection model. Lastly, anomaly detection model based on graph is given based on graph Laplacian and spectral vector of the pixels. A threshold value is given to judge whether the currently detection pixel is anomaly or not. Experiments for synthetic data and real hyperspectral image is proposed in this paper. The proposed algorithm is compared with three classical anomaly detection algorithms. ROC curves and AUC values are given for both synthetic data and real data in the paper. Experiments results show that LADM algorithm can improve the accuracy of anomaly detection for hyperspectral imagery, and reduced the false alarm rate.

Accession Number: WOS:000661249000007

Conference Title: Applied Optics and Photonics China (AOPC) Conference - Optical Spectroscopy and Imaging and Biomedical Optics

Conference Date: NOV 30-DEC 02, 2020

Conference Location: Beijing, PEOPLES R CHINA

Conference Sponsors: Chinese Soc Opt Engn, SPIE, Acad Opto Elect Elect Technol China, Sci & Technol Low Light Level Night Vis Lab, Sci & Technol Electro Opt Informat Secur Control Lab

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-3954-6

Record 22 of 109

Title: Image Semantic Segmentation Based on High-Resolution Networks for Monitoring Agricultural Vegetation

Author(s): Ganchenko, V (Ganchenko, Valentin); Starovoitov, V (Starovoitov, Valery); Zheng, XT (Zheng, Xiangtao)

Book Group Author(s): IEEE COMP SOC

Source: 2020 22ND INTERNATIONAL SYMPOSIUM ON SYMBOLIC AND NUMERIC ALGORITHMS FOR SCIENTIFIC COMPUTING (SYNASC 2020)  Book Series: International Symposium on Symbolic and Numeric Algorithms for Scientific Computing  Pages: 264-269  DOI: 10.1109/SYNASC51798.2020.00050  Published: 2020  

Abstract: In the article, recognition of state of agricultural vegetation from aerial photographs at various spatial resolutions was considered. Proposed approach is based on a semantic segmentation using convolutional neural networks. Two variants of High-Resolution network architecture (HRNet) are described and used. These neural networks were trained and applied to aerial images of agricultural fields. In our experiments, accuracy of four land classes recognition (soil, healthy vegetation, diseased vegetation and other objects) was about 93-94%.

Accession Number: WOS:000674702000039

Conference Title: 22nd International Symposium on Symbolic and Numeric Algorithms for Scientific Computing (SYNASC)

Conference Date: SEP 01-04, 2020

Conference Location: ELECTR NETWORK

Conference Sponsors: W Univ Timisoara, Johannes Kepler Univ Linz, Res Inst Symbol Computat, Res Inst eAustria, IBM, Nokia, Intel, MemIQ, eta2u, Continental, Cmed, CyberBee Software

ISSN: 2470-8801

ISBN: 978-1-7281-7628-4

Record 23 of 109

Title: High-speed focusing and scanning light through multimode fiber

Author(s): Geng, Y (Geng, Yi); Zhang, ZK (Zhang, Zaikun); He, ZQ (He, Zhengquan); Chen, H (Chen, Hui); Wang, RD (Wang, Ruiduo); Kong, DP (Kong, Depeng); Guo, HT (Guo, Haitao)

Edited by: Zhu J; Chen W; Zhang Z; Zhong M; Wang P; Qiu J

Source: 24TH NATIONAL LASER CONFERENCE & FIFTEENTH NATIONAL CONFERENCE ON LASER TECHNOLOGY AND OPTOELECTRONICS  Book Series: Proceedings of SPIE  Volume: 11717  Article Number: 1171715  DOI: 10.1117/12.2586318  Published: 2020  

Abstract: The image distortions caused by the inherent mode dispersion and coupling of the multimode fiber (MMF) lead its output light field to be scattered and prevent it from applicating in endoscopy. Although various wavefront shaping methods have been proposed to overcome these image distortions and form the focused spots through the MMF, they are usually time-consuming due to the multiple iterations and tedious calculation. In this paper, we present a binary amplitude-only modulation parallel coordinate algorithm for focusing and scanning light through a multimode fiber (MMF) based on the digital micro-mirror device (DMD) in a reference-free multimode fiber imaging system. In principle, our algorithm is capable of efficiently calculating the masks to be added to DMD for yielding a series of tightly focused spots; and for the same number of modulation sub-regions, our method is more than M (the number of focused spots) times faster than the amplitude iterative optimization algorithm. In the experiment, efficient light focusing and scanning at the distal end of the MMF without the iteration process are demonstrated. Furthermore, we demonstrate that the proposed method can also be extended to focus and scan light at multiple planes along the axial direction by just modifying the input wavefront accordingly. We predict the high-speed focusing method through the MMF might have the potential application for fast spot-scanning imaging.

Accession Number: WOS:000651826800040

Conference Title: 24th National Laser Conference / 15th National Conference on Laser Technology and Optoelectronics (LTO)

Conference Date: OCT 17-20, 2020

Conference Location: Shanghai, PEOPLES R CHINA

Conference Sponsors: Chinese Acad Engn, Chinese Inst Elect, Chinese Opt Soc, Chinese Laser Press

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-4270-6

Record 24 of 109

Title: A Non-local Rank-Constraint Hyperspectral Images Denoising Method with 3-D Anisotropic Total Variation

Author(s): Gong, T (Gong, Tao); Wen, DS (Wen, Desheng); He, TB (He, Tianbin)

Book Group Author(s): IOP

Source: 2019 4TH INTERNATIONAL CONFERENCE ON COMMUNICATION, IMAGE AND SIGNAL PROCESSING (CCISP 2019)  Book Series: Journal of Physics Conference Series  Volume: 1438  Article Number: 012024  DOI: 10.1088/1742-6596/1438/1/012024  Published: 2020  

Abstract: Hyperspectral Images (HSIs) are usually degraded by many kinds of noise called mixed noise, which greatly limits the subsequent applications of HSIs. Many researches have proved the patch-based low-rank methods and the total variation (TV) based approaches have a good effect on reducing noise in HSIs. Here, we propose a non-local patch based rank-constraint HSIs noise suppression methods with a global 3-D anisotropic total variation (NLRATV). Differing from previous patch-based methods which usually ignore spatial structural information, we add more structural constraints with the non-local similarity across patches for suppressing the structural noise that exists at the same location of many bands. Besides, we utilize the global 3-D anisotropic total variation to ensure its smoothness in spatial and spectral dimensionalities while reconstructing the image. The augmented Lagrange multiplier method is adopted to optimize the proposed algorithm. The real data experiments have proved the superiority of NLRATV in decreasing mixed and dense noise.

Accession Number: WOS:000618445200024

Conference Title: 4th International Conference on Communication, Image and Signal Processing (CCISP)

Conference Date: NOV 14-16, 2019

Conference Location: Phuket, THAILAND

Conference Sponsors: Asia Pacific Inst Sci & Engn

ISSN: 1742-6588

eISSN: 1742-6596

Record 25 of 109

Title: Approximate Reliability Analysis for New Generation Avionics Network

Author(s): Guo, L (Guo, Lin); Wang, XD (Wang, Xiaodong); Wang, ZQ (Wang, Zhuqing); Zhang, S (Zhang, Shuang); Guo, YM (Guo, Yangming)

Edited by: Xing LD; Tian ZG; Peng R; Zuo MJ

Source: 2020 ASIA-PACIFIC INTERNATIONAL SYMPOSIUM ON ADVANCED RELIABILITY AND MAINTENANCE MODELING (APARM)  Published: 2020  

Abstract: The new generation avionics network consists of various topologies including point-to-point, arbitrated loop and switched structures. The precise reliability computation of such a large-scale network seems to be an NP-hard problem. According to the reliability analysis and feature of avionic networks, this paper proposed three reliability computation models via topological transformations which are the possible connecting cases of equipment and links in the avionics networks. The proposed models can be applied to compute the reliabilities of point-to-point and arbitrated loop topologies structures precisely, and also the probability of switched topology structure approximately through determining the upper bound. While the approximate reliability calculation process of the avionics system network can be conducted by combining the proposed models for different sub-structures three models. Finally, the approximate reliability analysis of a certain avionic network example is performed with the corresponding result being provided, and then the rules of approximate reliability computing are also indicated.

Accession Number: WOS:000946387500046

Conference Title: International Symposium on Advanced Reliability and Maintenance Modeling (APARM)

Conference Date: AUG 20-23, 2020

Conference Location: Vancouver, CANADA

Author Identifiers:

ISBN: 978-1-7281-7102-9

Record 26 of 109

Title: Spatial heterodyne spectroscopy for long-wave infrared: optical design and laboratory performance

Author(s): Han, B (Han, Bin); Feng, YT (Feng, Yutao); Zhang, ZH (Zhang, Zhaohui); Bai, QL (Bai, Qinglan); Wu, JQ (Wu, Junqiang); Wu, Y (Wu, Yang); Chang, CG (Chang, Chenguang); Sun, J (Sun, Jian)

Edited by: Liu J; Wang Y; Ling Z; Sun Y; Jin D

Source: AOPC 2020: OPTICAL SPECTROSCOPY AND IMAGING; AND BIOMEDICAL OPTICS  Book Series: Proceedings of SPIE  Volume: 11566  Article Number: 115660Q  DOI: 10.1117/12.2580379  Published: 2020  

Abstract: Spatial heterodyne spectroscopy for long-wave infrared identifies an ozone line near 1133 cm(-1) (about 8.8 mu m) as a suitable target line, the Doppler shifts of which are used to retrieve stratosphere wind and ozone concentration. The basic principle of Spatial Heterodyne Spectroscopy (SHS) is elaborated. Theoretical analyses for the optical parameters of spatial heterodyne spectroscopy are deduced. The optical system is designed to work at 160 K and to maximize the field of view (FOV). The optical design and simulation is carried on to fulfill the requirement. The principle prototype was built and a frequency-stable laser was used to conduct the experiment. Result shows that the designed interferometer can meet the requirement of spectral resolution (0.1 cm(-1)) and that the spatial frequency of fringe pattern is consistent with the theoretical value at normal temperature and pressure.

Accession Number: WOS:000661249000025

Conference Title: Applied Optics and Photonics China (AOPC) Conference - Optical Spectroscopy and Imaging and Biomedical Optics

Conference Date: NOV 30-DEC 02, 2020

Conference Location: Beijing, PEOPLES R CHINA

Conference Sponsors: Chinese Soc Opt Engn, SPIE, Acad Opto Elect Elect Technol China, Sci & Technol Low Light Level Night Vis Lab, Sci & Technol Electro Opt Informat Secur Control Lab

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-3954-6

Record 27 of 109

Title: Investigation on Smart Cushion Based on SFS Structure and its Application in Physiological and Activity Monitoring

Author(s): Han, SY (Han, Shuying); Xu, W (Xu, Wei); You, SH (You, Shanhong); Dong, B (Dong, Bo); Tan, FZ (Tan, Fengze); Yu, CY (Yu, Changyuan); Zhao, W (Zhao, Wei); Wang, YS (Wang, Yishan)

Book Group Author(s): IEEE

Source: 2020 OPTO-ELECTRONICS AND COMMUNICATIONS CONFERENCE (OECC 2020)  Book Series: Opto-Electronics and Communications Conference-OECC  Published: 2020  

Abstract: A smart cushion based on SFS (single-mode-few-mode-single-mode) structure is proposed and experimentally demonstrated, which can be applied in physiological and activity states monitoring simultaneously. The sensing unit embedded in a common cushion is designed as a sandwich structure, consisting of a piece of fiberglass mesh, a SFS structure layer and a polyvinyl chloride (PVC) layer thus the sensitivity can be significantly enhanced. With off-line processing and analyzing of the raw signals collected from the cushion system, the heartbeat rate (HR) and respiratory rate (RR) can be obtained with the maximum error of 1 bpm and the activity states on the cushion can be clearly distinguished within the accuracy of one second. Such a smart cushion has the advantages of low cost, compact structure and high comfort, especially suitable for office workers and the elderly in nursing homes.

Accession Number: WOS:000646644700133

Conference Title: 25th Opto-Electronics and Communications Conference (OECC)

Conference Date: OCT 04-08, 2020

Conference Location: Taipei, TAIWAN

Conference Sponsors: Chunghwa Telecom, JPC Connectiv, Ethernet Copper Opt Networking, FOCI, Usenlight Corp, Anritsu, Inopticals, Trust Measurement Technol Corp Exfo, Santec, Synchronous Commun Corp, Hwacom Syst Inc, IEEE, Taiwan Tech, IEEE Photon Soc, Taipei Chapter, TPS, IEEE Taipei Sect, Minist Sci & Technol, IEICE Commun Soc, Elect Soc, Opt Soc

Author Identifiers:

ISSN: 2166-8884

eISSN: 2166-8892

ISBN: 978-1-7281-5445-9

Record 28 of 109

Title: Highly Sensitive Smart Cushion Embedded with SMS Structure for Contactless Vital Signs and Activity Monitoring

Author(s): Han, SY (Han, Shuying); Xu, W (Xu, Wei); You, SH (You, Shanhong); Dong, B (Dong, Bo); Yu, CY (Yu, Changyuan); Zhao, W (Zhao, Wei); Wang, YS (Wang, Yishan)

Edited by: Zhang X; Li B; Yu C; Zhang X

Source: OPTOELECTRONIC DEVICES AND INTEGRATION IX  Book Series: Proceedings of SPIE  Volume: 11547  Article Number: 1154707  DOI: 10.1117/12.2573877  Published: 2020  

Abstract: A smart cushion based on single-mode-fiber-multimode-fiber-single-mode-fiber (SMS) with core-offset splicing, which can simultaneously realize human vital signs monitoring and activity monitoring, is proposed and experimentally demonstrated. The SMS structure is sandwiched between a piece of fiberglass mesh and a polyvinyl chloride ( PVC) layer and then embedded in a common home or office cushion, which is the component of the proposed cushion. When people sit on the cushion placed on a chair, micro-strain induced by human activity including respiration, heartbeat and body movement will change the output light intensity of the fiber structure. By signal processing algorithms including filtering, fast Fourier transform (FFT) and feature extraction, the respiration rate (RR) and heartbeat rate (HR) can be obtained and human activity state on the cushion including nobody state, movement state and normal state can be judged. Furthermore, the performances of two memory foam cushions with different thicknesses are compared and proven to be both available. Such a smart portable cushion can realize real-time, noninvasive and highly sensitive monitoring of vital signs and activities within the accuracy of one second, especially for the elderly in nursing homes and office workers.

Accession Number: WOS:000632625300001

Conference Title: Conference on Optoelectronic Devices and Integration IX

Conference Date: OCT 12-16, 2020

Conference Location: ELECTR NETWORK

Conference Sponsors: SPIE, Chinese Opt Soc

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-3910-2

Record 29 of 109

Title: Wideband high-resolution spectral analysis assisted by soliton micro-combs

Author(s): Hu, H (Hu, Hao); Chen, L (Chen, Liao); Wang, RL (Wang, Ruolan); Zhao, YJ (Zhao, Yanjing); Wang, XY (Wang, Xinyu); Wang, WQ (Wang, Weiqiang); Zhang, C (Zhang, Chi); Zhang, WF (Zhang, Wenfu); Zhang, XL (Zhang, Xinliang)

Book Group Author(s): IEEE

Source: 2020 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)  Book Series: Conference on Lasers and Electro-Optics  Published: 2020  

Abstract: A high-resolution and large-bandwidth spectral analysis is demonstrated utilizing tunable laser and micro-comb. Bandwidth is extended by 100 times up to 2.5 THz with 2-MHz resolution and a high-Q resonator is successfully characterized in L-band. (C) 2020 The Author(s)

Accession Number: WOS:000612090002094

Conference Title: Conference on Lasers and Electro-Optics (CLEO)

Conference Date: MAY 10-15, 2020

Conference Location: San Jose, CA

Conference Sponsors: IEEE

Author Identifiers:

ISSN: 2160-9020

ISBN: 978-1-943580-76-7

Record 30 of 109

Title: Research on real-time distance measurement of mobile eye tracking system based on neural network

Author(s): Hu, L (Hu, Ling); Gao, JR (Gao, Jiarui)

Edited by: Xu B; Mou K

Source: PROCEEDINGS OF 2020 IEEE 5TH INFORMATION TECHNOLOGY AND MECHATRONICS ENGINEERING CONFERENCE (ITOEC 2020)  Pages: 1561-1565  Published: 2020  

Abstract: With the development and application of eye-tracking technology, mobile eye-tracking systems have become more widely used due to their safety and portability. We combine eye-tracking systems with real-time object detection using machine learning. We propose a method of wearing an eye tracker in daily life to obtain the distance between the eye tracking system and the gaze target in real time. During the visual interaction of the eye tracking system, in order to obtain the distance from the eyeball fixation target to the eyeball in real time, the world camera of the mobile eye tracking system pupil labs first collects the position and scale information of the detected target image in real time, and uses camera calibration principle, pinhole camera model and camera distortion model to establish a ranging equation, and then the feasibility of the real-time ranging equation is verified through a specified distance experiment. The total average relative error after de-distortion at the position of 50cm-75cm is reduced to 1.25%, and the highest accuracy-0.9182cm distance measurement can be achieved within the effective distance.

Accession Number: WOS:000617764100308

Conference Title: IEEE 5th Information Technology and Mechatronics Engineering Conference (ITOEC)

Conference Date: JUN 12-14, 2020

Conference Location: ELECTR NETWORK

Conference Sponsors: IEEE, GUAST

ISBN: 978-1-7281-4323-1; 978-1-7281-4322-4

Record 31 of 109

Title: Pencil-beam scanning catheter for intravascular optical coherence tomography

Author(s): Kang, JQ (Kang, Jiqiang); Zhu, R (Zhu, Rui); Sun, YX (Sun, Yunxu); Li, JA (Li, Jianan); Wong, KKY (Wong, Kenneth K. Y.)

Book Group Author(s): IEEE

Source: 2020 ASIA COMMUNICATIONS AND PHOTONICS CONFERENCE (ACP) AND INTERNATIONAL CONFERENCE ON INFORMATION PHOTONICS AND OPTICAL COMMUNICATIONS (IPOC)  Published: 2020  

Abstract: A structure-simplified pencil-beam scanning probe is demonstrated for intravascular optical coherence tomography catheters. In vivo imaging capability of this catheter is verified by a clinical system with a stent-implanted beating porcine heart as the sample. (C) 2020 The Author(s)

Accession Number: WOS:000698627100014

Conference Title: Asia Communications and Photonics Conference / International Conference on Information Photonics and Optical Communications (ACP/IPOC)

Conference Date: OCT 24-27, 2020

Conference Location: Beijing, PEOPLES R CHINA

Conference Sponsors: OSA, SPIE, IEEE, IEEE Photon Soc, COS, CIC

Author Identifiers:

ISBN: 978-1-943580-82-8

Record 32 of 109

Title: Sub-aperture optical system testing by using of a modified simulateous fit method

Author(s): Kewei, E (Kewei, E.); Zhao, JK (Zhao, Jianke); Wang, T (Wang, Tao); Wang, ZF (Wang, Zhengfeng); Liu, K (Liu, Kai); Chang, M (Chang, Ming); Zhou, Y (Zhou, Yan)

Edited by: Kong L; Zhang D; Luo X

Source: AOPC 2020: OPTICS ULTRA PRECISION MANUFACTURING AND TESTING  Book Series: Proceedings of SPIE  Volume: 11568  Article Number: 115681C  DOI: 10.1117/12.2579949  Published: 2020  

Abstract: Sub-aperture stitching interferometry can be used for measurement of wavefront of large aperture optical system. A variety of sub-aperture stitching algorithms have been studied to reconstruct the sub-aperture data to obtain full aperture wavefront. The simultaneous fitting method plays an important role among those stitching algorithms which uses a series of global polynomials to accomplish the fitting of the test wavefronts, however, it can only be applied in the case of there have no overlap between each sub-apertures. Therefore, a modified simultaneous fitting method is proposed and is applied to measure the wavefront of large aperture optical system. The proposed algorithm is applicable whether there exists overlap between each sub-aperture or not. The numerical simulation is carried out to evaluate the accuracy of the algorithm. Further, a practical stitching experiment that test an optical system with a diameter of 850mm was implemented to demonstrate the modified algorithm.

Accession Number: WOS:000616198900047

Conference Title: Applied Optics and Photonics China (AOPC) Conference - Optics Ultra Precision Manufacturing and Testing

Conference Date: JUN 29-30, 2020

Conference Location: Shanghai, PEOPLES R CHINA

Conference Sponsors: Chinese Soc Opt Engn, SPIE, Fudan Univ, Shanghai Engn Res Ctr Ultra Precis Opt Mfg, Shanghai Engn Res Ctr Extreme Opt Mfg & Measurement

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-3958-4

Record 33 of 109

Title: Calculation of Verticality in Large-Aperture Optical Centering Machinery Turning

Author(s): Lei, Y (LeiYu); Fu, X (FuXing); Kang, SF (KangShifa); Fu, XH (FuXihong)

Edited by: Kong L; Zhang D; Luo X

Source: AOPC 2020: OPTICS ULTRA PRECISION MANUFACTURING AND TESTING  Book Series: Proceedings of SPIE  Volume: 11568  Article Number: 115680W  DOI: 10.1117/12.2579432  Published: 2020  

Abstract: Large-Aperture Optical Centering Machinery Turning technology has been widely used in precision optical machine assembly. The main principle is to make optical axis and machine axis coincide by maintaining the collimation image and structural end face unchanged when rotating. Structural parts are fabricated precisely after than. This process requires good verticality between the end face of the optical element and its optical axis. A specific method is required to calculate the verticality of the end face and the optical axis. This paper proposed a method based on self-collimated image deviation control and least squares fitting. Combining with an example, numerical calculation is carried out with error analysis. Finally the verticality is 21um which provides reliable data guarantee for the selection of the reference during optical centering fabricating processing.

Accession Number: WOS:000616198900031

Conference Title: Applied Optics and Photonics China (AOPC) Conference - Optics Ultra Precision Manufacturing and Testing

Conference Date: JUN 29-30, 2020

Conference Location: Shanghai, PEOPLES R CHINA

Conference Sponsors: Chinese Soc Opt Engn, SPIE, Fudan Univ, Shanghai Engn Res Ctr Ultra Precis Opt Mfg, Shanghai Engn Res Ctr Extreme Opt Mfg & Measurement

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-3958-4

Record 34 of 109

Title: A denoising method based on CNN for the measurement of far-field focal spot of high power laser using Schlieren method

Author(s): Li, G (Li, Gang); Wang, ZZ (Wang, Zhengzhou); Wang, L (Wang, Li); Tan, M (Tan, Meng); Wang, W (Wang, Wei); Yi, DC (Yi, Dongchi); Wei, JT (Wei, Jitong)

Edited by: Luo X; Jiang Y; Lu J; Liu D

Source: AOPC 2020: OPTICAL SENSING AND IMAGING TECHNOLOGY  Book Series: Proceedings of SPIE  Volume: 11567  Article Number: 115671I  DOI: 10.1117/12.2579390  Published: 2020  

Abstract: Schlieren method is an effective method to measure the high dynamic range far-field focal spot of high power laser at present, it has been used in the comprehensive diagnosis system of the host facility of the national large scientific device. However, the background subtraction algorithm is used for denosing process of the main lobe and side lobe images in the experiment, which could not effectively remove the noise under the condition of strong radiation. In order to improve the reconstruction accuracy and reliability of far-field focal spot measurement based on schlieren method, there are two aspects have been proposed and optimized in this paper as follows, the mathematical model for the measurement of high dynamic range far-field focal spot is constructed, the noise of images captured by detected CCD is removed effectively. Firstly, the mathematical model of laser focal spot measurement is constructed, which provided a theoretical basis for the measurement of far-field focal spot based on schlieren method. Secondly, the denoising algorithm based on Convolutional Neural Network (DnCNN) is introduced into the denoising of main lobe and side lobe CCD image, which can effectively remove the noise of different levels (0-75db) of main lobe and side lobe CCD image.The experimental results show that the noise signal of main lobe and side lobe images are removed by using DnCNN algorithm, and the best reconstructed image of far-field focal spot of high power laser is obtained when the influencers of amplified noise of main lobe image is reduced greatly. After the above optimization and improvement, it will meet the requirements for accuracy and efficiency of the measurement of high dynamic range far-field focal spot.

Accession Number: WOS:000651815600053

Conference Title: Applied Optics and Photonics China (AOPC) Conference - Optical Sensing and Imaging Technology

Conference Date: AUG 25-27, 2020

Conference Location: Xiamen, PEOPLES R CHINA

Conference Sponsors: Chinese Soc Opt Engn, SPIE, Acad Opto Elect Elect Technol China, Sci & Technol Low Light Level Night Vis Lab, Sci & Technol Electro Opt Informat Secur Control

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-3956-0

Record 35 of 109

Title: Supercontinuum generation in a high index doped silica glass slot waveguide

Author(s): Li, GK (Li, Guangkuo); Li, YH (Li, Yuhua); Ho, VWL (Ho, Victor W. L.); Li, Q (Li, Qian); Wang, SH (Wang, Shao Hao); Davidson, R (Davidson, Roy); Little, BE (Little, Brent E.); Chu, ST (Chu, Sai T.)

Book Group Author(s): IEEE

Source: 2020 CONFERENCE ON LASERS AND ELECTRO-OPTICS PACIFIC RIM (CLEO-PR)  Article Number: C3C-6  DOI: 10.1364/CLEOPR.2020.C3C_6  Published: 2020  

Abstract: We demonstrate over one octave spanning of supercontinuum (SC) generation at 1550 nm in a 2.7 cm long high-index doped glass waveguide with a thin SiO2 slot across the middle of core.

Accession Number: WOS:000637291000183

Conference Title: Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)

Conference Date: AUG 03-05, 2020

Conference Location: ELECTR NETWORK

Conference Sponsors: IEEE

Author Identifiers:

ISBN: 978-0-646-82504-5

Record 36 of 109

Title: A High-Performance Annularly Stacked Laser Diode Pump

Author(s): Li, JL (Li, Junli); Sun, LC (Sun, Lichen); Liu, M (Liu, Ming); Han, Y (Han, Yang); Fu, TW (Fu, Tuanwei); Cai, L (Cai, Lei); Zheng, YF (Zheng, Yanfang); Yan, MN (Yan, Minna); Wang, J (Wang, Juan); Tao, CH (Tao, Chunhua); Gao, LJ (Gao, Lijun); Wang, JW (Wang, Jingwei); Zah, CE (Zah, Chung-en); Liu, XS (Liu, Xingsheng)

Edited by: Zhu NH; Hofmann WH; He JJ

Source: SEMICONDUCTOR LASERS AND APPLICATIONS X  Book Series: Proceedings of SPIE  Volume: 11545  Article Number: 115450J  DOI: 10.1117/12.2573534  Published: 2020  

Abstract: A high peak power annularly-stacked laser diode pump has been designed and manufactured for a solid state laser (SSL), which is constructed by 12 single annular stacks composed of 3-bar laser diode (LD) submodules. High peak power and high wavelength uniformity have been considered. Macro channel cooling has been used during the operation of the annular stacks, at typical coolant flow rate of 2L/min. Heat dissipation and stress of a single annular stack have been simulated by finite element software, which shows high temperature uniformity of 3-bar submodules (+/- 0.5 degrees C) and low package stress (11.8MP).
The peak power of the annularly stacked laser diode pump has reached 234kW at a peak current of 450A or less. A high uniformity of centroid wavelength (802.1nm) with a full width at half maximum (FWHM) of 4nm has been measured. More than 24 million shots have been verified for the 3-bar LD submodules.

Accession Number: WOS:000632712800015

Conference Title: Conference on Semiconductor Lasers and Applications X

Conference Date: OCT 12-16, 2020

Conference Location: ELECTR NETWORK

Conference Sponsors: SPIE, Chinese Opt Soc

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-3906-5

Record 37 of 109

Title: VISUAL TRACKING VIA TEMPORALLY-REGULARIZED CONTEXT-AWARE CORRELATION FILTERS

Author(s): Liao, JW (Liao, Jiawen); Qi, C (Qi, Chun); Cao, JZ (Cao, Jianzhong); Bian, H (Bian, He)

Book Group Author(s): IEEE

Source: 2020 IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING (ICIP)  Book Series: IEEE International Conference on Image Processing ICIP  Pages: 2051-2055  Published: 2020  

Abstract: Classical discriminative correlation filter (DCF) model suffers from boundary effects, several modified discriminative correlation filter models have been proposed to mitigate this drawback using enlarged search region, and remarkable performance improvement has been reported by related papers. However, model deterioration is still not well addressed when facing occlusion and other challenging scenarios. In this work, we propose a novel Temporally-regularized Context-aware Correlation Filters (TCCF) model to model the target appearance more robustly. We take advantage of the enlarged search region to obtain more negative samples to make the filter sufficiently trained, and a temporal regularizer, which restricting variation in filter models between frames, is seamlessly integrated into the original formulation. Our model is derived from the new discriminative learning loss formulation, a closed form solution for multidimensional features is provided, which is solved efficiently using Alternating Direction Method of Multipliers (ADMM). Extensive experiments on standard OTB-2015, TempleColor-128 and VOT-2016 benchmarks show that the proposed approach performs favorably against many state-of-the-art methods with real-time performance of 28fps on single CPU.

Accession Number: WOS:000646178502032

Conference Title: IEEE International Conference on Image Processing (ICIP)

Conference Date: SEP 25-28, 2020

Conference Location: ELECTR NETWORK

Conference Sponsors: Inst Elect & Elect Engineers, Inst Elect & Elect Engineers, Signal Proc Soc

ISSN: 1522-4880

ISBN: 978-1-7281-6395-6

Record 38 of 109

Title: Topology optimization design of large aperture mirror for the VT system of SVOM

Author(s): Lin, F (Lin, Feng); Wang, W (Wang, Wei); Zhang, J (Zhang, Jian); Fan, XW (Fan, Xuewu); Xu, WJ (Xu, Wenjing)

Edited by: Xue S; Zhang Z

Source: AOPC 2020: TELESCOPES, SPACE OPTICS, AND INSTRUMENTATION  Book Series: Proceedings of SPIE  Volume: 11570  Article Number: 115700T  DOI: 10.1117/12.2580256  Published: 2020  

Abstract: This article, which is based on the topology optimization theory, considered the lightweight design of large aperture reflectors. Firstly, the material selection is based on the low temperature environment and the low temperature infrared optical mechanical structure design principles. Then, by using the minimum deformation of the mirror surface as the objective function, mirror volume and rigid body displacement as design restraints, and imposing manufacturing constraints, a conceptual design of the mirror back with manufacturability was accomplished. Finally, by using the finite element analysis method to compare the performance of the topologically optimized mirror and the primal mirror, it shows that the topologically optimized mirror met the design requirements in terms of lightening effect and structural rigidity, and the surface figure met the requirements under the influence of gravity, which emphasizes the feasibility and practicality of topology optimization in the large aperture mirror' design.

Accession Number: WOS:000651810100028

Conference Title: 9th Conference on Applied Optics and Photonics China (AOPC) - Telescopes, Space Optics, and Instrumentation

Conference Date: NOV 30-DEC 02, 2020

Conference Location: Beijing, PEOPLES R CHINA

Conference Sponsors: SPIE, Chinese Soc Opt Engn, Acad Opto Elect Elect Technol China, Sci & Technol Low Light Level Night Vis Lab, Sci & Technol Electro Opt Informat Secur Control Lab

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-3962-1

Record 39 of 109

Title: High-resolution Shape From Focus Based on Line Scan Imaging

Author(s): Ling, X (Ling, Xi); Zhang, PC (Zhang, Pengchang); Zhang, ZY (Zhang, Zhaoyang); Gao, RX (Gao, Ruixue)

Edited by: Luo X; Jiang Y; Lu J; Liu D

Source: AOPC 2020: OPTICAL SENSING AND IMAGING TECHNOLOGY  Book Series: Proceedings of SPIE  Volume: 11567  Article Number: 115672Q  DOI: 10.1117/12.2579988  Published: 2020  

Abstract: The surfaces of many ancient relics as murals and oil paintings we can see today appear three-dimensional features to some extent, which poses a challenging problem for line scan imaging to capture the features on these objects. With this goal in mind, a line scan camera-based shape from focus (SFF) method is proposed for obtaining three-dimensional information in planar cultural heritages with three-dimensional features. First, line scan imaging is employed to obtain high-resolution image sequence of objects. Next, spatial frequency (SF) is used to evaluate the focus quality of a specific local area of each image in the image sequence to find out the position of the best focused image. Through analyzing the relationship between this position and the relative movement distance of the camera-object, the three-dimensional shape of the object can be roughly estimated. Then, a fitting method was utilized to refine the local details of the three-dimensional shape of the object. An experimental setup is established to restore the three-dimensional shape of the test sample using the proposed SFF algorithm. Root mean square error (RMSE) was used as the evaluation criteria, and the result demonstrated the effectiveness of the proposed method, which shows the high precision three-dimensional shape recovery and also gains the benefits of high resolution and uniform point cloud distribution. Finally, the factors affecting the results of 3D reconstruction was discussed in detail, which may guide the selection of parameters in practice.

Accession Number: WOS:000651815600097

Conference Title: Applied Optics and Photonics China (AOPC) Conference - Optical Sensing and Imaging Technology

Conference Date: AUG 25-27, 2020

Conference Location: Xiamen, PEOPLES R CHINA

Conference Sponsors: Chinese Soc Opt Engn, SPIE, Acad Opto Elect Elect Technol China, Sci & Technol Low Light Level Night Vis Lab, Sci & Technol Electro Opt Informat Secur Control

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-3956-0

Record 40 of 109

Title: Pointing design and testing of corner reflector

Author(s): Liu, J (Liu Jie); Wang, H (Wang Hu); Lin, SM (Lin Shangmin); Xue, YK (Xue Yaoke); Liu, Y (Liu Yang); Liu, MY (Liu Meiying); Shen, Y (Shen Yang)

Edited by: Luo X; Jiang Y; Lu J; Liu D

Source: AOPC 2020: OPTICAL SENSING AND IMAGING TECHNOLOGY  Book Series: Proceedings of SPIE  Volume: 11567  Article Number: 115673M  DOI: 10.1117/12.2580209  Published: 2020  

Abstract: The corner reflector is usually realized by fixing the corner cube prism through a specific structure, which is much easier to install and debugin practical application. As we all know, one of the most important uses of the corner reflector is that it can be used as a passive target marker for satellites and aircrafts. At a certain distance, as the angle of incidence increases, the return light efficiency of the corner reflector gradually decreases, and the return light efficiency directly affects the shape and brightness of the target point. Usually when multiple targets are tracked, the better the target direction consistency, the more uniform the light spot can be obtained.
This paper introduces the method of drawing the normal direction of the corner cube prism to the mounting surface. The normal direction of the corner cube prism is tested by the self-collimating theodolite and the direction error is within 1', and the error of return light efficiency is better than 5%, which provides high- precision pointing for the combination of multiple corner reflectors. On this basis, we expand the pointing design of the sub-corner cube prism for the plane array of the corner reflectors. After testing, the direction error of the sub-corner cube prism is within 5'.

Accession Number: WOS:000651815600129

Conference Title: Applied Optics and Photonics China (AOPC) Conference - Optical Sensing and Imaging Technology

Conference Date: AUG 25-27, 2020

Conference Location: Xiamen, PEOPLES R CHINA

Conference Sponsors: Chinese Soc Opt Engn, SPIE, Acad Opto Elect Elect Technol China, Sci & Technol Low Light Level Night Vis Lab, Sci & Technol Electro Opt Informat Secur Control

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-3956-0

Record 41 of 109

Title: BCG Signal Processing Based on Advanced LMS Filter for optical fiber monitor

Author(s): Liu, YF (Liu, Yifan); Xu, W (Xu, Wei); Yu, CY (Yu, Changyuan)

Edited by: Zhang X; Li B; Yu C; Zhang X

Source: OPTOELECTRONIC DEVICES AND INTEGRATION IX  Book Series: Proceedings of SPIE  Volume: 11547  Article Number: 115471P  DOI: 10.1117/12.2575310  Published: 2020  

Abstract: Heart Rate Variability (HRV) analysis is an important tool for health monitoring. A non-invasive smart health monitoring system based on optical fiber interferometer can get HRV information from the Ballistocardiogram (BCG) signal. For some patients, the HRV can hardly be calculated due to the interferences from breath and other vibrations. In this research, we obtain a stable and high-sensitive BCG signal by a Mach-Zehnder interferometer (MZI) based sensor. In order to reduce the noise in signal, we introduce an advanced least mean squares (LMS) adaptive filter into the procedure. We use the signal processed by a bandpass filter as the 'desired signal' to deal with the raw data and obtain a preferable output for HRV calculation.

Accession Number: WOS:000632625300031

Conference Title: Conference on Optoelectronic Devices and Integration IX

Conference Date: OCT 12-16, 2020

Conference Location: ELECTR NETWORK

Conference Sponsors: SPIE, Chinese Opt Soc

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-3910-2

Record 42 of 109

Title: Research on Fuzzy Adaptive Control Algorithm with Extended Dimension for Disturbance Torque

Author(s): Lu, CM (Lu Changming); Gao, X (Gao Xin); Xie, ML (Xie Meilin); Cao, Y (Cao Yu); Huang, W (Huang Wei); Lian, XZ (Lian Xuezheng); Liu, K (Liu Kai); Hao, W (Hao Wei)

Edited by: Xu B; Mou K

Source: PROCEEDINGS OF 2020 IEEE 5TH INFORMATION TECHNOLOGY AND MECHATRONICS ENGINEERING CONFERENCE (ITOEC 2020)  Pages: 421-425  Published: 2020  

Abstract: In order to solve the problem that friction, wire-wound, wind resistance and other disturbing moments seriously affect the stability tracking precision during the task of the photoelectric pod system, the fuzzy adaptive control algorithm with extended dimension is proposed in this paper. In this method, an accelerometer is first installed on the reflector of the pod. After obtaining the linear acceleration information and transforming it into angular acceleration, the fuzzy adaptive controller is designed according to the characteristics of wind resistance pulsation torque. The controller takes the mirror angular velocity, angular acceleration and target miss distance as input, and further adjusts the output of the controller according to the change of input and the fuzzy rule base of training. This algorithm was applied to the stable tracking experiment of a certain type of pod, and the results show that the tracking accuracy is improved from 59.7 mu rad to 32.4 mu rad. It is proved that the algorithm proposed in this paper can effectively suppress the disturbance torque and significantly improve the tracking accuracy and speed stability in the process of pod mission. This algorithm can be used in other servo control systems as a general method of disturbance torque suppression.

Accession Number: WOS:000617764100081

Conference Title: IEEE 5th Information Technology and Mechatronics Engineering Conference (ITOEC)

Conference Date: JUN 12-14, 2020

Conference Location: ELECTR NETWORK

Conference Sponsors: IEEE, GUAST

ISBN: 978-1-7281-4323-1; 978-1-7281-4322-4

Record 43 of 109

Title: Optical design of portable Raman spectrometer based on-site rapid detection

Author(s): Luo, WB (Luo, Weibo); Yang, JF (Yang, Jianfeng)

Edited by: Wang P; Lu Y

Source: ICOSM 2020: OPTOELECTRONIC SCIENCE AND MATERIALS  Book Series: Proceedings of SPIE  Volume: 11606  Article Number: 116060G  DOI: 10.1117/12.2585551  Published: 2020  

Abstract: Raman spectroscopy is used to detect material structure, which is currently one of the fastest growing frontiers in the field of spectroscopy. The detection speed of Raman spectroscopy is very fast and does not require sample preparation, so non-destructive detection can be achieved. The realization of portable Raman spectrometer enables Raman spectroscopy to be used for on-site detection. The portable Raman spectrometer is easy to operate. Moreover, the price is relatively cheap, and the application demand in various industries has become greater. We design a portable Raman spectrometer optical system based on on-site rapid detection. It provides a important foundation for the development and production of portable Raman spectrometers.

Accession Number: WOS:000664496100015

Conference Title: International Conference on Optoelectronic Science and Materials (ICOSM)

Conference Date: SEP 25-27, 2020

Conference Location: Hefei, PEOPLES R CHINA

Conference Sponsors: Key Lab Infrared & Low Temp Plasma Anhui Prov, Natl Univ Def Technol, Univ Sci & Technol China, Acad Exchange Informat Ctr

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-4043-6

Record 44 of 109

Title: Research on Gait Planning Algorithm of Quadruped Robot Based on Central Pattern Generator

Author(s): Ma, ZH (Ma, Zihan); Liang, YB (Liang, Yanbing); Tian, H (Tian, Hua)

Edited by: Fu J; Sun J

Source: PROCEEDINGS OF THE 39TH CHINESE CONTROL CONFERENCE  Book Series: Chinese Control Conference  Pages: 3948-3953  Published: 2020  

Abstract: The characteristics of Hopf oscillator are analyzed, and the feasibility of its application in gait generation of quadruped robot is discussed. Two kinds of CPG control networks are constructed by using Hopf oscillator and the structures of the two networks are analyzed and modeled. These two CPG can produce stable gait with strict phase relationship. The robot simulation software Webots and MATLAB are used for co-simulation. According to the output control signal of CPG network, each joint of quadruped robot is controlled and trot gait planning is realized. The simulation results show that the CPG network constructed by Hopf oscillator can achieve good gait planning for quadruped robot, which has the advantages of simple model and clear thinking.

Accession Number: WOS:000629243504015

Conference Title: 39th Chinese Control Conference (CCC)

Conference Date: JUL 27-29, 2020

Conference Location: Shenyang, PEOPLES R CHINA

ISSN: 2161-2927

ISBN: 978-988-15639-0-3

Record 45 of 109

Title: Comparison of short focal length dual-fields LWIR optical lens

Author(s): Mei, C (Mei Chao); Liang, CG (Liang Chenguang); Ma, YJ (Ma Yingjun); Fei, JQ (Fei Jiaqi); Guo, HN (Guo Huinan)

Edited by: Luo X; Jiang Y; Lu J; Liu D

Source: AOPC 2020: OPTICAL SENSING AND IMAGING TECHNOLOGY  Book Series: Proceedings of SPIE  Volume: 11567  Article Number: 115670V  DOI: 10.1117/12.2575902  Published: 2020  

Abstract: With the development of infrared surveillance technology, the short focus zoom LWIR lens has been paid to more and more attention. In this paper, dual fields zoom lens with the fields of 20 degrees x25 degrees/8 degrees x10 degrees are designed by two different methods. The main specifications of the lens include: aperture is 1 / 2, detector resolution is 640 x 512, pixel size is 15 mu m, temperature adaptability is -40 degrees to + 60 degrees. And we compare the volume, weight, imaging transmission, transmissivity and economy of the lens by different methods. It is found that the re-imaging method has smaller volume, weight and economy. While another imaging method has better transmittance, so the imaging system can reach higher noise equivalent power at the same image quality.

Accession Number: WOS:000651815600030

Conference Title: Applied Optics and Photonics China (AOPC) Conference - Optical Sensing and Imaging Technology

Conference Date: AUG 25-27, 2020

Conference Location: Xiamen, PEOPLES R CHINA

Conference Sponsors: Chinese Soc Opt Engn, SPIE, Acad Opto Elect Elect Technol China, Sci & Technol Low Light Level Night Vis Lab, Sci & Technol Electro Opt Informat Secur Control

Author Identifiers: