Record 1 of 59

Title: NTIRE 2022 Spectral Recovery Challenge and Data Set

Author(s): Arad, B (Arad, Boaz); Timofte, R (Timofte, Radu); Yahel, R (Yahel, Rony); Morag, N (Morag, Nimrod); Bernat, A (Bernat, Amir); Cai, YH (Cai, Yuanhao); Lin, J (Lin, Jing); Lin, ZD (Lin, Zudi); Wang, HQ (Wang, Haoqian); Zhang, YL (Zhang, Yulun); Pfister, H (Pfister, Hanspeter); Van Gool, L (Van Gool, Luc); Liu, SA (Liu, Shuai); Li, YQ (Li, Yongqiang); Feng, CY (Feng, Chaoyu); Lei, L (Lei, Lei); Li, JJ (Li, Jiaojiao); Du, SC (Du, Songcheng); Wu, CX (Wu, Chaoxiong); Leng, YH (Leng, Yihong); Song, R (Song, Rui); Zhang, MW (Zhang, Mingwei); Song, CX (Song, Chongxing); Zhao, SY (Zhao, Shuyi); Lang, ZQ (Lang, Zhiqiang); Wei, W (Wei, Wei); Lei, Z (Zhang, Lei); Dian, RW (Dian, Renwei); Shan, TC (Shan, Tianci); Guo, AJ (Guo, Anjing); Feng, CG (Feng, Chengguo); Liu, JY (Liu, Jinyang); Agarla, M (Agarla, Mirko); Bianco, S (Bianco, Simone); Buzzelli, M (Buzzelli, Marco); Celona, L (Celona, Luigi); Schettini, R (Schettini, Raimondo); He, J (He, Jiang); Xiao, Y (Xiao, Yi); Xiao, JJ (Xiao, Jiajun); Yuan, QQ (Yuan, Qiangqiang); Li, J (Li, Jie); Zhang, LP (Zhang, Liangpei); Kwon, T (Kwon, Taesung); Ryu, D (Ryu, Dohoon); Bae, H (Bae, Hyokyoung); Yang, HH (Yang, Hao-Hsiang); Chang, HE (Chang, Hua-En); Huang, ZK (Huang, Zhi-Kai); Chen, WT (Chen, Wei-Ting); Kuo, SY (Kuo, Sy-Yen); Chen, JY (Chen, Junyu); Li, HW (Li, Haiwei); Liu, S (Liu, Song); Uma, SK (Uma, Sabarinathan K.); Bama, BS (Bama, B. Sathya); Roomi, SMM (Roomi, S. Mohamed Mansoor)

Book Group Author(s): IEEE

Source: 2022 IEEE/CVF CONFERENCE ON COMPUTER VISION AND PATTERN RECOGNITION WORKSHOPS, CVPRW 2022  Book Series: IEEE Computer Society Conference on Computer Vision and Pattern Recognition Workshops  Pages: 862-880  DOI: 10.1109/CVPRW56347.2022.00102  Published: 2022  

Abstract: This paper reviews the third biennial challenge on spectral reconstruction from RGB images, i.e., the recovery of whole-scene hyperspectral (HS) information from a 3-channel RGB image. This challenge presents the "ARAD 1K" data set: a new, larger-than-ever natural hyperspectral image data set containing 1,000 images. Challenge participants were required to recover hyperspectral information from synthetically generated JPEG-compressed RGB images simulating capture by a known calibrated camera, operating under partially known parameters, in a setting which includes acquisition noise. The challenge was attended by 241 teams, with 60 teams competing in the final testing phase, 12 of which provided detailed descriptions of their methodology which are included in this report. The performance of these submissions is reviewed and provided here as a gauge for the current state-of-the-art in spectral reconstruction from natural RGB images.

Accession Number: WOS:000861612700093

Conference Title: IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR)

Conference Date: JUN 18-24, 2022

Conference Location: New Orleans, LA

Conference Sponsors: IEEE, CVF, IEEE Comp Soc

Author Identifiers:

ISSN: 2160-7508

ISBN: 978-1-6654-8739-9

Record 2 of 59

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

Author(s): Bai, Z (Bai, Zhe); Ma, YL (Ma, Yilong)

Edited by: Jiang Y; Wang X; Wang Y; Liu D; Xue B

Source: AOPC 2022: OPTICAL SENSING, IMAGING, AND DISPLAY TECHNOLOGY  Book Series: Proceedings of SPIE  Volume: 12557  Article Number: 125571X  DOI: 10.1117/12.2651915  Published: 2022  

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.

Accession Number: WOS:000990417500063

Conference Title: Conference on AOPC - Optical Sensing, Imaging, and Display Technology

Conference Date: DEC 18-20, 2022

Conference Location: ELECTR NETWORK

Conference Sponsors: SPIE, Chinese Soc Opt Engn, Tianjin Univ, Univ Elect Sci & Technol China, Nanjing Univ Sci & Technol, Beijing Inst Space Mech & Elect, Sci & Technol Low Light Level Night Vis Lab, Sci & Technol Electro Opt Informat Secur Control

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-6229-2

Record 3 of 59

Title: An efficient wide area imaging scheme based on spiral scanning

Author(s): Chang, SS (Chang, Sansan); Li, X (Li, Xiang); Yang, K (Yang, Kai)

Edited by: Jiang Y; Wang X; Wang Y; Liu D; Xue B

Source: AOPC 2022: OPTICAL SENSING, IMAGING, AND DISPLAY TECHNOLOGY  Book Series: Proceedings of SPIE  Volume: 12557  Article Number: 125572O  DOI: 10.1117/12.2652233  Published: 2022  

Abstract: There are three common scanning schemes for large area imaging for airborne cameramulti lens splicing, circumferential scanning or reciprocating scanning. However, the lens splicing form requires multiple lenses, and the system is cumbersome. The circumferential scanning imaging obtains a wide area image through azimuth continuous scanning and the field of view in the pitching direction of this imaging method is a fixed value. And the imaging efficiency of reciprocating scanning form is low due to the need for multiple mechanism turns. In this paper, a new spiral scanning scheme method over large area imaging is proposed, which carries the area array camera on the two-dimensional platform with external azimuth gimbal and internal pitch gimbal. Scanning in azimuth combined with pitch motion, the spiral scanning trail is composed for wide-area imaging, and this method requires only one area array camera and only one rotation in pitch direction in one imaging process, which has high imagery efficiency. At the same time, the spiral dynamic scanning algorithm which can isolate attitude disturbance and compensate flight movement to achieve the scanning imaging for large area of the specified area is deduced. Then the implementation form of the scanning method is also derived. Finally, we take some simulation to test the method. The results show that the spiral scanning algorithm can compensate the attitude disturbance and aircraft attitude disturbance, and can obtain the staring imaging of 254km(2) (mapping radius of 9km) in 3.8 seconds, when the field of view angle of area array camera is 7.5 degrees x11.25 degrees, the flight speed is 360km/h, the azimuth attitude disturbance is 15 degrees, the pitch attitude disturbance is 15 degrees, and the roll attitude disturbance is 8 degrees, at the flight altitude of 7500m. Therefore, the spiral scanning algorithm scheme is suitable for wide area imaging of moving carrier and has certain significance for the research of wide area scanning imaging system.

Accession Number: WOS:000990417500088

Conference Title: Conference on AOPC - Optical Sensing, Imaging, and Display Technology

Conference Date: DEC 18-20, 2022

Conference Location: ELECTR NETWORK

Conference Sponsors: SPIE, Chinese Soc Opt Engn, Tianjin Univ, Univ Elect Sci & Technol China, Nanjing Univ Sci & Technol, Beijing Inst Space Mech & Elect, Sci & Technol Low Light Level Night Vis Lab, Sci & Technol Electro Opt Informat Secur Control

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-6229-2

Record 4 of 59

Title: Telecom-compatible on-chip generation and processing of complex photon states in time and frequency

Author(s): Chemnitz, M (Chemnitz, Mario); Yu, H (Yu, Hao); Sciara, S (Sciara, Stefania); Fischer, B (Fischer, Bennet); Roztocki, P (Roztocki, Piotr); Crockett, B (Crockett, Benjamin); Reimer, C (Reimer, Christian); Caspani, L (Caspani, Lucia); Kues, M (Kues, Michael); Munro, WJ (Munro, William J.); Chu, ST (Chu, Sai T.); Little, BE (Little, Brent E.); Moss, DJ (Moss, David J.); Wang, ZM (Wang, Zhiming); Azaña, J (Azana, Jose); Morandotti, R (Morandotti, Roberto)

Edited by: Garcia-Blanco SM; Cheben P

Source: INTEGRATED OPTICS: DEVICES, MATERIALS, AND TECHNOLOGIES XXVI  Book Series: Proceedings of SPIE  Volume: 12004  Article Number: 1200409  DOI: 10.1117/12.2607224  Published: 2022  

Abstract: We exploit the time and frequency modes of light generated on integrated platforms for the practical generation and coherent processing of complex photon states (2-level time-entangled photons, d-level frequency-entangled photon pairs, and 3-level discrete cluster states), by using standard silicon-based chips and fiber telecommunications components.

Accession Number: WOS:000836324200008

Conference Title: Conference on Integrated Optics - Devices, Materials, and Technologies XXVI at SPIE OPTO Conference

Conference Date: JAN 22-FEB 28, 2022

Conference Location: ELECTR NETWORK

Conference Sponsors: SPIE

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-4880-7; 978-1-5106-4879-1

Record 5 of 59

Title: The Earth 2.0 space mission analysis and spacecraft design

Author(s): Chen, W (Chen Wen); Chen, K (Chen Kun); Yang, YQ (Yang Yingquan); Han, XB (Han Xingbo); Bi, XZ (Bi Xingzi); He, T (He Tao); Duan, XL (Duan Xuliang); Huang, JJ (Huang Jiangjiang); Liang, H (Liang Hong); Zhang, KX (Zhang Kuoxiang); Wang, HY (Wang Haoyu); Liu, L (Liu Liu); He, JW (He Junwang); Qin, GJ (Qin Genjian); Li, JS (Li Jinsong); Wang, T (Wang Tian); Ge, J (Ge Jian); Zhang, H (Zhang Hui); Zhang, YS (Zhang Yongshuai); Zhou, D (Zhou Dan); Zhang, CC (Zhang Congcong); Tang, ZH (Tang Zhenghong); Yu, Y (Yu Yong); Zang, WC (Zang Weicheng); Mao, SD (Mao Shude); Chen, YH (Chen Yonghe); Liu, XH (Liu Xiaohua); Song, ZX (Song Zongxie); Gao, W (Gao Wei); Zhang, HF (Zhang Hongfei); Wang, J (Wang Jian)

Edited by: Coyle LE; Matsuura S; Perrin MD

Source: SPACE TELESCOPES AND INSTRUMENTATION 2022: OPTICAL, INFRARED, AND MILLIMETER WAVE  Book Series: Proceedings of SPIE  Volume: 12180  Article Number: 1218017  DOI: 10.1117/12.2629697  Published: 2022  

Abstract: The Earth 2.0 (ET) mission is a Chinese next-generation space mission to detect thousands of Earth-sized terrestrial planets, including habitable Earth-like planets orbiting solar type stars (Earth 2.0s), cold low-mass planets, and free-floating planets. To meet the scientific goals, the ET spacecraft will carry six 30 cm diameter transit telescopes with each field of view of 500 square degrees, and one 35 cm diameter microlensing telescope with a field of view of 4 square degrees, monitor similar to 1.2M FGKM dwarfs in the original Kepler field and its neighboring fields continuously while monitoring over 30M stars in the Galactic bulge direction. The high precision transit observations require high photometry precision and pointing stability, which is the key drive for the ET spacecraft design.
In this paper, details of the overall mission modeling and analysis will be presented. The spacecraft orbit, pointing strategy, stability requirements are presented, as well as the space-ground communication analysis. The ET spacecraft adopts an ultra-high photometry precision & high stable platform, largely inherited from other space science missions. The preliminary design of spacecraft which meets mission requirements is introduced, including the spacecraft overall configuration, observation modes, avionics architecture and development plan, which pays great attention to the pointing stability and huge volume science telemetry download.

Accession Number: WOS:000865466600036

Conference Title: Conference on Space Telescopes and Instrumentation - Optical, Infrared, and Millimeter Wave

Conference Date: JUL 17-22, 2022

Conference Location: Montreal, CANADA

Conference Sponsors: SPIE

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-5342-9

Record 6 of 59

Title: Conceptual Design Study of the Science Payload for the Earth 2.0 Mission

Author(s): Chen, YH (Chen, Yonghe); Yin, DY (Yin, Dayi); Wei, CAX (Wei, Chuanxin); Liu, XH (Liu, Xiaohua); Zhang, Q (Zhang, Quan); Yang, BY (Yang, Baoyu); Zhu, YJ (Zhu, Yuji); Ge, J (Ge, Jian); Zhou, D (Zhou, Dan); Zhang, CC (Zhang, Congcong); Li, Y (Li, Yan); Song, ZX (Song, Zongxi); Gao, W (Gao, Wei); Li, W (Li, Wei); Wang, FT (Wang, Fengtao); Shen, C (Shen, Chao); Pan, Y (Pan, Yue); Zhang, HF (Zhang, Hongfei); Wang, J (Wang, Jian); Wang, H (Wang, Hui)

Edited by: Coyle LE; Matsuura S; Perrin MD

Source: SPACE TELESCOPES AND INSTRUMENTATION 2022: OPTICAL, INFRARED, AND MILLIMETER WAVE  Book Series: Proceedings of SPIE  Volume: 12180  Article Number: 121804A  DOI: 10.1117/12.2630044  Published: 2022  

Abstract: The Earth 2.0 (ET) mission is a space mission in China which will be operated at the Earth-Sun L2 orbit with a designed lifetime longer than 4 years. ET's scientific payload consist of six 30cm diameter transit telescopes with each field of view of 500 square degrees and one 35 cm diameter microlensing telescope with a field of view of 4 square degrees. Each telescope is equipped with a camera with 2x2 9Kx9K CMOS detectors, and Front-end Electronics (FEE). Each transit telescope is an f/1.57 eight-lens refractive optical system while the microlensing telescope is an f/17.2 catadioptric optical system with diffraction-limited design. The diameter of 90% Encircled Energy (EE90) for transit telescopes is within 5x5 pixels while the FWHM of PSF for the microlensing telescope is less than 0.78 arcsec. Fine Guidance Sensors are mounted at the four edges of the CMOS camera. All seven telescopes are fixed on a common mounting reference plate, and a large sun shield is used to block the heat flow from the Sun and provide a stable thermal environment for the telescopes. It also blocks straylight form the Sun, Earth, and the Moon. Each telescope has an additional top hood to block straylight incident at a large angle while the top hood is also used as a radiator to cool the detectors to below 40 degrees C. With PID heating loops, each telescope will work at -30 +/- 0.3 degrees C while the detectors work at -40 +/- 0.1 degrees C. Details of the conceptual design for the scientific payload will be presented.

Accession Number: WOS:000865466600123

Conference Title: Conference on Space Telescopes and Instrumentation - Optical, Infrared, and Millimeter Wave

Conference Date: JUL 17-22, 2022

Conference Location: Montreal, CANADA

Conference Sponsors: SPIE

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-5342-9

Record 7 of 59

Title: Robust Speckle-Autocorrelation Non-Line-of-Sight Imaging with Generative Adversarial Networks

Author(s): Chen, Y (Chen, Yue); Qu, B (Qu, Bo); Lu, XQ (Lu, Xiaoqiang)

Edited by: Xiao L; Xu D

Source: THIRTEENTH INTERNATIONAL CONFERENCE ON GRAPHICS AND IMAGE PROCESSING (ICGIP 2021)  Book Series: Proceedings of SPIE  Volume: 12083  Article Number: 120830B  DOI: 10.1117/12.2623424  Published: 2022  

Abstract: Non-line-of-sight (NLOS) imaging, which utilizes weak photons that diffusely reflect from the visible surfaces (e.g., diffuse walls), can reconstruct hidden objects around the corner. Recently, lots of non-line-of-sight imaging methods have been proposed, such as time-of-flight (ToF)-based methods, coherence-based methods, and intensity-based methods. However, most of these methods are time-consuming for data acquisition and have poor robustness in the reconstruction process. In this paper, the novel application of Generative Adversarial Network is introduced to NLOS imaging. A robust, real-time NLOS imaging method based on autocorrelation mapping Generative Adversarial Network (AMGAN) is proposed, which reconstructs hidden scenes by learning the autocorrelation mapping from speckle-autocorrelation to the hidden target. In order to train the proposed AMGAN, we also analyze the principles of speckle-autocorrelation NLOS imaging and the noise model of the imaging process. Then a speckle-autocorrelation NLOS imaging dataset SANLOS is synthesized in this paper. Finally, our method is compared with other methods based on deep learning quantitatively and qualitatively. The experimental results demonstrate that the proposed approach achieves better NLOS reconstruction quality and is more robust under different exposure times compared with state-of-art methods.

Accession Number: WOS:000796487100010

Conference Title: 13th International Conference on Graphics and Image Processing (ICGIP)

Conference Date: AUG 18-20, 2021

Conference Location: Yunnan Univ, Kunming, PEOPLES R CHINA

Conference Sponsors: Yunnan Univ, Sch Informat Sci & Engn, Foshan Univ, Chang'an Univ, Xian Univ Technol, NW A & F Univ, Sichuan Univ, Ocean Univ China, Univ Portsmouth, China Soc Image & Graph, China Graph Soc

Conference Host: Yunnan Univ

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-5043-5; 978-1-5106-5042-8

Record 8 of 59

Title: Multi-Section Waveguide Method for Facet Temperature Reduction and Improved Reliability of High-Power Laser Diodes

Author(s): Ebadi, K (Ebadi, Kaveh); Liu, YX (Liu, Yuxian); Sünnetçioglu, AK (Sunnetcioglu, Ali Kaan); Gündogdu, S (Gundogdu, Sinan); Sengül, S (Sengul, Serdar); Zhao, YL (Zhao, Yuliang); Lan, Y (Lan, Yu); Yang, GW (Yang, Guowen); Demir, A (Demir, Abdullah)

Edited by: Sciamanna M; Panajotov K; Hofling S

Source: SEMICONDUCTOR LASERS AND LASER DYNAMICS X  Book Series: Proceedings of SPIE  Volume: 12141  Article Number: 1214104  DOI: 10.1117/12.2621651  Published: 2022  

Abstract: Catastrophic optical mirror damage (COMD) limits the output power and reliability of lasers diodes (LDs). Laser self-heating together with facet absorption of output power cause the facet to reach a critical temperature (T-c), resulting in COMD and irreversible device failure. The self-heating of the laser contributes significantly to the facet temperature, but it has not been addressed so far. We implement a multi-section waveguide method where the heat is separated from reaching the output facet by exploiting an electrically isolated window. The laser waveguide is divided into two electrically isolated laser and transparent window sections. The laser section is pumped at high current levels to achieve laser output, and the passive waveguide is biased at low injection currents to obtain a transparent waveguide with negligible heat generation. Using this design, we demonstrate facet temperatures lower than the junction temperature of the laser even at high output power operation. While standard LDs show COMD failures, the multi-section waveguide LDs are COMD-free. Our technique and results provide a pathway for high-reliability LDs, which would find diverse applications in semiconductor lasers.

Accession Number: WOS:000838022100003

Conference Title: Conference on Semiconductor Lasers and Laser Dynamics X Part of SPIE Photonics Europe Conference

Conference Date: APR 03-MAY 20, 2022

Conference Location: ELECTR NETWORK

Conference Sponsors: SPIE, IdEx Univ Strasbourg, CNRS, ICube, Univ Strasbourg

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-5159-3; 978-1-5106-5158-6

Record 9 of 59

Title: User-friendly, reconfigurable all-optical signal processing with integrated photonics

Author(s): Fischer, B (Fischer, Bennet); Chemnitz, M (Chemnitz, Mario); Wetzel, B (Wetzel, Benjamin); Rortocki, P (Rortocki, Piotr); MacLellan, B (MacLellan, Benjamin); Reimer, C (Reimer, Christian); Little, B (Little, Brent); Chu, S (Chu, Sai); Viktorov, E (Viktorov, Evgeny); Moss, D (Moss, David); Kues, M (Kues, Michael); Azaña, J (Azana, Jose); Pasquazi, A (Pasquazi, Alessia); Peccianti, M (Peccianti, Marco); Morandotti, R (Morandotti, Roberto)

Book Group Author(s): IEEE

Source: 2022 3RD URSI ATLANTIC AND ASIA PACIFIC RADIO SCIENCE MEETING (AT-AP-RASC)  Published: 2022  

Abstract: The development of reconfigurable, integrated all-optical signal processors on will enable low-cost and accessible platforms for key technologies such as bio-medical imaging, telecommunications and quantum optics. We demonstrate, that simple, user-friendly, programmable integrated circuits in combination with evolutionary optimization algorithms can constitute an essential pillar in the field of smart-photonics.

Accession Number: WOS:000848420400031

Conference Title: 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC)

Conference Date: MAY 29-JUN 03, 2022

Conference Location: SPAIN

Conference Sponsors: URSI

Author Identifiers:

ISBN: 978-9-4639-6805-8

Record 10 of 59

Title: A new off-axis Gregorian mechanical structure and its alignment method

Author(s): Fu, X (FuXing); Lei, Y (LeiYu); Cao, MQ (CaoMingQiang); Yin, YM (YinYaMei)

Edited by: Tan J; Luo X; Huang M; Kong L; Zhang D

Source: SEVENTH ASIA PACIFIC CONFERENCE ON OPTICS MANUFACTURE (APCOM 2021)  Book Series: Proceedings of SPIE  Volume: 12166  Article Number: 1216676  DOI: 10.1117/12.2617928  Published: 2022  

Abstract: As for the conventional off-axis telescope system structure, the primary and secondary mirror are mostly fixed. The alignment process lacks adjustment mechanism. In addition, the off-axis system has no rotational symmetry which increases the difficulty of alignment and makes the cycle longer. In order to solve the above problems, an off-axis telephoto system structure is designed. The primary mirror has a four degree-of-freedom adjustment mechanism can be fine-tuned manually. The secondary mirror is driven by 6-aixs motion hexapod electrically. At the same time, perturbation analysis is carried out for this optical system. The sensitivity matrix between misalignments of second mirror and aberration coefficients is obtained. Based on the matrix, adjustment strategy is proposed([1-9]). Finally, the effectiveness of the designed structure and adjustment strategy is verified by experiments. The detailed process is described below.

Accession Number: WOS:000799210000247

Conference Title: 7th Asia Pacific Conference on Optics Manufacture (APCOM)

Conference Date: OCT 28-31, 2021

Conference Location: Shanghai, PEOPLES R CHINA

Conference Sponsors: Chinese Soc Opt Engn, Adv Opt Mfg Youth Expert Comm, CAS, Inst Opt & Elect, CAS, Shanghai Inst Opt & Fine Mech, CAS, Xian Inst Opt & Precis Mech, China Acad Engn Phys, Inst Machinery Mfg Technol, Beijing Inst Space Mech & Elect, Hong Kong Polytechn Univ, State Key Lab Ultra Precis Machining Technol, Shanghai Jiao Tong Univ, Sch Mech Engn, Fudan Univ, Shanghai Engn Res Ctr Ultra Precis Opt Mfg, Shanghai Engn Res Ctr Extreme Opt Mfg & Measurement, Shenzhen Univ, Shenzhen Key Lab High Performance Nontradit Mfg

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-5209-5; 978-1-5106-5208-8

Record 11 of 59

Title: The Earth 2.0 Space Mission for Detecting Earth-like Planets around Solar Type Stars

Author(s): Ge, J (Ge, Jian); Zhang, H (Zhang, Hui); Zhang, YS (Zhang, Yongshuai); Li, Y (Li, Yan); Zhou, D (Zhou, Dan); Tang, ZH (Tang, Zhenghong); Zhang, CC (Zhang, Congcong); Wang, CY (Wang, Chaoyan); Yu, Y (Yu, Yong); Yao, XY (Yao, Xinyu); Zhu, JP (Zhu, Jiapeng); Fang, T (Fang, Tong); Chen, W (Chen, Wen); Han, XB (Han, Xingbo); Chen, K (Chen, Kun); Yang, YQ (Yang, Yingquan); Bi, XZ (Bi, Xingzi); Zhang, KX (Zhang, Kuoxiang); Chen, YH (Chen, Yonghe); Liu, XH (Liu, Xiaohua); Yin, DY (Yin, Dayi); Zhang, Q (Zhang, Quan); Yang, BY (Yang, Baoyu); Wei, CAX (Wei, Chuanxin); Zhu, YJ (Zhu, Yuji); Song, ZX (Song, Zongxi); Gao, W (Gao, Wei); Li, W (Li, Wei); Wang, FT (Wang, Fengtao); Cheng, PF (Cheng, Pengfei); Shen, C (Shen, Chao); Pan, Y (Pan, Yue); Zhang, HF (Zhang, Hongfei); Wang, J (Wang, Jian); Wang, H (Wang, Hui); Chen, C (Chen, Cheng); Zhang, J (Zhang, Jun); Wang, ZY (Wang, Zhiyue); Zang, WC (Zang, Weicheng); Mao, SD (Mao, Shude); Zhu, W (Zhu, Wei); Wang, SX (Wang, Sharon Xuesong); Xie, JW (Xie, Jiwei); Liu, HG (Liu, Huigen); Zhou, JL (Zhou, Jilin); Yang, M (Yang, Ming); Jiang, CF (Jiang, Chaofeng); Chen, DC (Chen, Dichang); Tang, W (Tang, Wei); Sun, MF (Sun, Mengfei); Wang, MT (Wang, Mutian); Li, YD (Li, Yudong); Wen, L (Wen, Lin); Feng, J (Feng, Jie); Willis, K (Willis, Kevin); Huang, C (Huang, Chelsea); Ma, B (Ma, Bo); Wang, YH (Wang, Yonghao); Shen, RF (Shen, Rongfeng); Tam, PHT (Tam, Pak-Hin Thomas); Hu, ZC (Hu, Zhecheng); Yang, Y (Yang, Yanlv); Feng, FB (Feng, Fabo); Xiang, MS (Xiang, Maosheng); Yu, J (Yu, Jie); Zhang, JH (Zhang, Jinghua); Wu, YQ (Wu, Yaqian); Zong, WK (Zong, Weikai); Yuan, HB (Yuan, Haibo); Li, TD (Li, Tanda); Zhao, YN (Zhao, Yinan); Zou, YCA (Zou, Yuanchuan); Deng, HP (Deng, Hongping); Liu, BB (Liu, Beibei); Yang, J (Yang, Jun); Ye, QZ (Ye, Quanzhi); Yin, QZ (Yin, Qing-zhu)

Edited by: Coyle LE; Matsuura S; Perrin MD

Source: SPACE TELESCOPES AND INSTRUMENTATION 2022: OPTICAL, INFRARED, AND MILLIMETER WAVE  Book Series: Proceedings of SPIE  Volume: 12180  Article Number: 1218015  DOI: 10.1117/12.2630656  Published: 2022  

Abstract: A space mission called "Earth 2.0 (ET)" is being developed in China to address a few of fundamental questions in the exoplanet field: How frequently habitable Earth-like planets orbit solar type stars (Earth 2.0s)? How do terrestrial planets form and evolve? Where did floating planets come from? ET consists of six 30 cm diameter transit telescope systems with each field of view of 500 square degrees and one 35 cm diameter microlensing telescope with a field of view of 4 square degrees. The ET transit mode will monitor similar to 1.2M FGKM dwarfs in the original Kepler field and its neighboring fields continuously for four years while the microlensing mode monitors over 30M I< 20.6 stars in the Galactic bulge direction. ET will merge its photometry data with that from Kepler to increase the time baseline to 8 years. This enhances the transit signal-to-noise ratio, reduce false positives, and greatly increases the chance to discover Earth 2.0s. Simulations show that ET transit telescopes will be able to identify similar to 17 Earth 2.0s, about 4,900 Earth-sized terrestrial planets and about 29,000 new planets. In addition, ET will detect about 2,000 transit-timing-variation (TTV) planets and 700 of them will have mass and eccentricity measurements. The ET microlensing telescope will be able to identify over 1,000 microlensing planets. With simultaneous observations with the ground-based KMTNet telescopes, ET will be able to measure masses of over 300 microlensing planets and determine the mass distribution functions of free-floating planets and cold planets. ET will be operated at the Earth-Sun L2 orbit with a designed lifetime longer than 4 years.

Accession Number: WOS:000865466600034

Conference Title: Conference on Space Telescopes and Instrumentation - Optical, Infrared, and Millimeter Wave

Conference Date: JUL 17-22, 2022

Conference Location: Montreal, CANADA

Conference Sponsors: SPIE

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-5342-9

Record 12 of 59

Title: Optical Design of the NA1.1 Infinite Conjugate Microscopic Objective

Author(s): Guo, XR (Guo Xinran); Chen, WL (Chen Weilin); Chang, J (Chang Jun); Li, DM (Li Dongmei); Chen, QF (Chen Qinfang); Li, CX (Li Chunxin)

Edited by: Zhou P

Source: ADVANCED FIBER LASER CONFERENCE, AFL2022  Book Series: Proceedings of SPIE  Volume: 12595  Article Number: 125950Q  DOI: 10.1117/12.2667151  Published: 2022  

Abstract: In order to solve the serious problem of ordinary biological microscopic objective lenses including field distortion, chromatic aberration and low resolving power, a high-resolution infinite conjugate microscopic objective with three fourth-order Zernike polynomial surfaces has been presented in this paper. The numerical aperture of microscopic system is 1.1 with 2.6mm focal length, which can be equipped with most field lens. The design and analysis results show that the par focal distance of the objective lens is 45mm, and the incidence angle and refraction angle of the optical surface of the lens are less than 60 degrees, which meets the international standard of the microscopic objective lens. The optical modulate transfer function (MTF) curve is close to the theoretical diffraction limit and the RMS wavefront error of the high-performance microscopic objective satisfied Marechal criterion. In addition, the tolerance analysis results show that the system can be processed based on the existing machining methods, despite the wavefront aberration RMS will deteriorate to 0.25 lambda The whole system can be used in genetic testing research and mirror test, which is expected to promote the development of medical testing and industrial test and become one of new generation of diagnostic tools.

Accession Number: WOS:001055604400025

Conference Title: Advanced Fiber Laser Conference (AFL)

Conference Date: NOV 11-13, 2022

Conference Location: Changsha, PEOPLES R CHINA

Conference Sponsors: Chinese Soc Opt Engn, Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Beijing Univ Technol, Huazhong Univ Sci & Technol, China Acad Engn Phys, Inst Chem Mat, China Acad Engn Phys, Key Lab High Energy Laser Sci & Technol, China Acad Engn Phys, Laser Fus Res Ctr, Shandong Univ, CAS, Shanghai Inst Opt & Fine Mech, Shanghai Univ, Shenzhen Technol Univ, S China Univ Technol, Tianjin Univ, Tsinghua Univ, Hunan Opt Soc, Tianjin Soc Laser Technol

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-6314-5; 978-1-5106-6315-2

Record 13 of 59

Title: Imaging through scattering medium based on lensless Fourier transform digital holography

Author(s): Hui, Z (Hui Zhang); Ruiduo, W (Ruiduo Wang); Zaikun, Z (Zaikun Zhang); Zhengquan, H (Zhengquan He)

Edited by: Tan J; Luo X; Huang M; Kong L; Zhang D

Source: SEVENTH ASIA PACIFIC CONFERENCE ON OPTICS MANUFACTURE (APCOM 2021)  Book Series: Proceedings of SPIE  Volume: 12166  Article Number: 121665X  DOI: 10.1117/12.2617699  Published: 2022  

Abstract: Recovering information of an object hidden behind turbid media has a vast range of applications. People have been trying many ways to achieve this goal. In this paper, we use lensless Fourier transform digital holography and statistical average to retrieve object information from speckle field. The relationship between parameters of ground glass and peak signal-to-noise ratio of reconstructed image is explored by establishing a rotating ground glass interferometric imaging system. The light beam emitted from the laser is divided into two beams by the beam splitter. One beam passes through the rotating ground glass after being reflected by the object (i.e. object light), and the other beam passes through the reflector and convex lens as a reference light, and then interferes with the object light. Finally the interference speckle pattern is captured by a CCD camera. Experiment results show that there is an optimal solution between the rotation speed of ground glass and the peak signal-to-noise ratio of the reconstructed image. This method has the advantages of compact system construction, easy implementation and fast reconstruction, since it does not require phase correction, complex image processing, scanning object or wavefront shaping.

Accession Number: WOS:000799210000205

Conference Title: 7th Asia Pacific Conference on Optics Manufacture (APCOM)

Conference Date: OCT 28-31, 2021

Conference Location: Shanghai, PEOPLES R CHINA

Conference Sponsors: Chinese Soc Opt Engn, Adv Opt Mfg Youth Expert Comm, CAS, Inst Opt & Elect, CAS, Shanghai Inst Opt & Fine Mech, CAS, Xian Inst Opt & Precis Mech, China Acad Engn Phys, Inst Machinery Mfg Technol, Beijing Inst Space Mech & Elect, Hong Kong Polytechn Univ, State Key Lab Ultra Precis Machining Technol, Shanghai Jiao Tong Univ, Sch Mech Engn, Fudan Univ, Shanghai Engn Res Ctr Ultra Precis Opt Mfg, Shanghai Engn Res Ctr Extreme Opt Mfg & Measurement, Shenzhen Univ, Shenzhen Key Lab High Performance Nontradit Mfg

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-5209-5; 978-1-5106-5208-8

Record 14 of 59

Title: Use of electrochemistry in mini-/micro-LED and VCSELs

Author(s): Kang, JH (Kang, Jin-ho); Elafandy, R (Elafandy, Rami); Li, BJ (Li, Bingjun); Song, J (Song, Jie); Han, J (Han, Jung)

Edited by: Kim JK; Krames MR; Strassburg M

Source: LIGHT-EMITTING DEVICES, MATERIALS, AND APPLICATIONS XXVI  Book Series: Proceedings of SPIE  Volume: 12022  Article Number: 120220C  DOI: 10.1117/12.2611573  Published: 2022  

Abstract: As optoelectronic semiconductor research reaches a level of saturation, incorporation of unconventional processes and techniques often add to new phenomena and opportunities. In this manuscript, we share our perspective regarding the application of electrochemistry to GaN and related compound semiconductors. Two specific examples of using nanoporous structures, created by electrochemistry, for mini-/micro- LEDs and for vertical cavity surface emitting lasers (VCSELs) are discussed.

Accession Number: WOS:000836332700010

Conference Title: Conference on Light-Emitting Devices, Materials, and Applications XXVI at SPIE Photonics WEST OPTO Conference

Conference Date: JAN 22-FEB 28, 2022

Conference Location: ELECTR NETWORK

Conference Sponsors: SPIE

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-4916-3; 978-1-5106-4915-6

Record 15 of 59

Title: Computer-aided alignment method for AIMS solar telescope

Author(s): Kewei, E (Kewei, E.); Fu, X (Fu, Xin); Shen, YL (Shen, Yuliang); Zhao, JK (Zhao, Jianke); Wang, T (Wang, Tao); Chang, M (Chang, Ming); Liu, SK (Liu, Shangkuo); Xue, X (Xue, Xun); Zhou, Y (Zhou, Yan)

Edited by: Tan J; Luo X; Huang M; Kong L; Zhang D

Source: SEVENTH ASIA PACIFIC CONFERENCE ON OPTICS MANUFACTURE (APCOM 2021)  Book Series: Proceedings of SPIE  Volume: 12166  Article Number: 121664V  DOI: 10.1117/12.2617389  Published: 2022  

Abstract: AIMS is an infrareds optical system for the accurate measurement of solar magnetic field, which is a national major scientific research project currently developed. The guiding optical system of AIMS is an off-axis Gregorian system, due to the designed minimum angle between the optical axis of the optical system and horizontal plane is 14.036 degrees, a sub-aperture stitching test approach is developed to test the wavefront of the system. That makes the process of precision alignment of the system very difficult and laborious. Therefore, we developed a two-step alignment approach that based on merit function regression method, the developed method can make alignment of AIMS guiding optical system efficiency and accuracy. In this paper, we explain the detailed two-step alignment method and apply it to the real alignment of AIMS guiding system. Aided with sub-aperture stitching measurements, the AIMS guiding system is aligned and the results show that in 0.076.rms wavefront error in effective aperture was achieved.

Accession Number: WOS:000799210000167

Conference Title: 7th Asia Pacific Conference on Optics Manufacture (APCOM)

Conference Date: OCT 28-31, 2021

Conference Location: Shanghai, PEOPLES R CHINA

Conference Sponsors: Chinese Soc Opt Engn, Adv Opt Mfg Youth Expert Comm, CAS, Inst Opt & Elect, CAS, Shanghai Inst Opt & Fine Mech, CAS, Xian Inst Opt & Precis Mech, China Acad Engn Phys, Inst Machinery Mfg Technol, Beijing Inst Space Mech & Elect, Hong Kong Polytechn Univ, State Key Lab Ultra Precis Machining Technol, Shanghai Jiao Tong Univ, Sch Mech Engn, Fudan Univ, Shanghai Engn Res Ctr Ultra Precis Opt Mfg, Shanghai Engn Res Ctr Extreme Opt Mfg & Measurement, Shenzhen Univ, Shenzhen Key Lab High Performance Nontradit Mfg

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-5209-5; 978-1-5106-5208-8

Record 16 of 59

Title: Calibration Error Prediction: Ensuring High-Quality Mobile Eye-Tracking

Author(s): Li, BB (Li, Beibin); Snider, JC (Snider, James C.); Wang, Q (Wang, Quan); Mehta, S (Mehta, Sachin); Foster, C (Foster, Claire); Barney, E (Barney, Erin); Shapiro, L (Shapiro, Linda); Ventola, P (Ventola, Pamela); Shic, F (Shic, Frederick)

Edited by: Spencer SN

Source: 2022 ACM SYMPOSIUM ON EYE TRACKING RESEARCH AND APPLICATIONS, ETRA 2022  DOI: 10.1145/3517031.3529634  Published: 2022  

Abstract: Gaze calibration is common in traditional infrared oculographic eye tracking. However, it is not well studied in visible-light mobile/remote eye tracking. We developed a lightweight real-time gaze error estimator and analyzed calibration errors from two perspectives: facial feature-based and Monte Carlo-based. Both methods correlated with gaze estimation errors, but the Monte Carlo method associated more strongly. Facial feature associations with gaze error were interpretable, relating movements of the face to the visibility of the eye. We highlight the degradation of gaze estimation quality in a sample of children with autism spectrum disorder (as compared to typical adults), and note that calibration methods may improve Euclidean error by 10%.

Accession Number: WOS:001098429400037

Conference Title: ACM Symposium on Eye Tracking Research and Applications (ETRA)

Conference Date: JUN 08-11, 2022

Conference Location: Seattle Childrens Bldg Cure, ELECTR NETWORK

Conference Sponsors: ACM SIGGRAPH, ACM SIGCHI, Real Labs Res, Google, iMotions, Ergoneers, SmartEye, FOVE, VisualCamp, GazePoint, Tobii, SR Res, Nvidia, Viewpointsystem, Adobe, RealEye, Blickshift, EyeLogic, Seattle Childrens Hosp

Conference Host: Seattle Childrens Bldg Cure

ISBN: 978-1-4503-9252-5

Record 17 of 59

Title: Alzheimer's level classification by 3D PMNet using PET/MRI multi-modal images

Author(s): Li, C (Li, Chao); Song, LY (Song, Liyao); Zhu, GP (Zhu, Guangpu); Hu, BL (Hu, Bingliang); Liu, XB (Liu, Xuebin); Wang, Q (Wang, Quan)

Book Group Author(s): IEEE

Source: 2022 IEEE INTERNATIONAL CONFERENCE ON ELECTRICAL ENGINEERING, BIG DATA AND ALGORITHMS (EEBDA)  Pages: 1068-1073  DOI: 10.1109/EEBDA53927.2022.9744769  Published: 2022  

Abstract: The accurate diagnosis of Alzheimer's disease (AD) has an important impact on early treatment. Positron emission tomography (PET) and magnetic resonance imaging (MRI) are popular imaging methods and are used to facilitate the identification and evaluation of AD. In this paper, we proposed a VGG-style 3D convolutional neural network (3D CNN) model, which is named 3D PET-MRI Net (3D PMNet), and it uses DiffGrad optimizer to speed up the convergence of the model and Focalloss function to improve the classification performance of unbalanced data processing. The multi-modal feature information of 3D MRI and PET images can be extracted using the 3D PMNet model, which provides convenience for AD diagnosis. Tenfold cross-validation was performed on the data of each patient in the data set to determine the group classification. The results showed that the proposed method achieves 97.49%, 81.25%, and 76.67% accuracy in the classification tasks of AD: NC, AD: MCI, and NC: MCI, respectively. Our PMNet reached 72.55% accuracy in AD: NC: MCI three group classification, which is significantly better than the other reported network models.

Accession Number: WOS:000941790700228

Conference Title: IEEE International Conference on Electrical Engineering, Big Data and Algorithms (EEBDA)

Conference Date: FEB 25-27, 2022

Conference Location: Changchun, PEOPLES R CHINA

Conference Sponsors: IEEE

Author Identifiers:

ISBN: 978-1-6654-1606-1

Record 18 of 59

Title: Design of subpixel response characterization measurements for the Earth 2.0 Mission

Author(s): Li, Y (Li, Yan); Wang, CY (Wang, Chaoyan); Zhang, H (Zhang, Hui); Zhang, YS (Zhang, Yongshuai); Tang, ZH (Tang, Zhenghong); Ge, J (Ge, Jian); Zhang, HF (Zhang, Hongfei); Wang, J (Wang, Jian); Song, ZX (Song, Zongxi); Gao, W (Gao, Wei)

Edited by: Coyle LE; Matsuura S; Perrin MD

Source: SPACE TELESCOPES AND INSTRUMENTATION 2022: OPTICAL, INFRARED, AND MILLIMETER WAVE  Book Series: Proceedings of SPIE  Volume: 12180  Article Number: 121804D  DOI: 10.1117/12.2630626  Published: 2022  

Abstract: The Earth 2.0 (ET) mission is a Chinese space mission designed to detect thousands of terrestrial-like planets, including habitable Earth-like planets orbiting solar type stars (i.e., Earth 2.0s), cold low-mass planets, and free-floating planets. Six 30cm telescopes are used for very high precision photometry measurements to detect transiting planets. In order to reach very high precision photometry, an intra-pixel response function (IPRF) of detectors needs to be measured for the ET design to keep image motions caused by spacecraft operation within an acceptable level. To characterize detectors, two setups have been developed in the lab to measure spot size of the characterization beam and subpixel sensitivity. Early characterization results are reported.

Accession Number: WOS:000865466600126

Conference Title: Conference on Space Telescopes and Instrumentation - Optical, Infrared, and Millimeter Wave

Conference Date: JUL 17-22, 2022

Conference Location: Montreal, CANADA

Conference Sponsors: SPIE

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-5342-9

Record 19 of 59

Title: Versatile, high bandwidth, RF and microwave photonic Hilbert transformers based on Kerr micro-combs

Author(s): Li, Y (Li, Yang); Tan, MX (Tan, Mengxi); Wu, JY (Wu, Jiayang); Xu, XY (Xu, Xingyuan); Sun, Y (Sun, Yang); Boes, A (Boes, Andreas); Corcoran, B (Corcoran, Bill); Nguyen, T (Nguyen, Thach); Chu, S (Chu, Sai); Little, B (Little, Brent); Morandotti, R (Morandotti, Roberto); Mitchell, A (Mitchell, Arnan); Moss, DJ (Moss, David J.)

Edited by: Garcia-Blanco SM; Cheben P

Source: INTEGRATED OPTICS: DEVICES, MATERIALS, AND TECHNOLOGIES XXVI  Book Series: Proceedings of SPIE  Volume: 12004  Article Number: 120040H  DOI: 10.1117/12.2607903  Published: 2022  

Abstract: We experimentally demonstrate bandwidth-tunable RF photonic Hilbert transformer based on an integrated Kerr micro-comb source. The micro-comb is generated by an integrated micro-ring resonator with a free spectral range of 48.9 GHz, yielding 75 micro-comb lines in the telecom C-band. By programming and shaping the generated comb lines according to calculated tap weights, we demonstrate high-speed Hilbert transform functions with tunable bandwidths ranging from 1.2 GHz to 15.3 GHz, switchable center frequencies from baseband to 9.5 GHz, and arbitrary fractional orders. The experimental results show good agreement with theory and confirm the effectiveness of our approach.

Accession Number: WOS:000836324200016

Conference Title: Conference on Integrated Optics - Devices, Materials, and Technologies XXVI at SPIE OPTO Conference

Conference Date: JAN 22-FEB 28, 2022

Conference Location: ELECTR NETWORK

Conference Sponsors: SPIE

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-4880-7; 978-1-5106-4879-1

Record 20 of 59

Title: An Optimization Algorithm for Optical Gain in the Multi-EDFAs-based Fiber-optic Time Synchronization

Author(s): Liu, B (Liu, Bo); Kong, WC (Kong, Weicheng); Guo, XX (Guo, Xinxing); Li, B (Li, Bo); Zhang, SG (Zhang, Shougang); Dong, RF (Dong, Ruifang); Liu, T (Liu, Tao)

Book Group Author(s): IEEE

Source: 2022 JOINT CONFERENCE OF THE EUROPEAN FREQUENCY AND TIME FORUM AND IEEE INTERNATIONAL FREQUENCY CONTROL SYMPOSIUM (EFTF/IFCS)  Book Series: Joint European Frequency and Time Forum and International Frequency Control Symposium  DOI: 10.1109/EFTF/IFCS54560.2022.9850958  Published: 2022  

Abstract: This article reports an optimization model of optical fiber time synchronization EDFA gain coefficient based on genetic algorithm (G A). According to a series of parameters such as the distance and attenuation of each section of optical fiber, the EDFA gain coefficient of each node is obtained for the purpose of maximizing the signal-to-noise ratio, SNR. This algorithm is further exploited for regulating the gains of bidirectional amplifiers, allowing optimization of the performance of the link. The developed algorithm was tested experimentally done with 210-and 300-km-long links in the laboratory, incorporating three and four amplifiers. The results suggest that, comparing with the fixed gain coefficient setting, the proposed solutions allow optimizing the SNR by 3-5 dB and reduce the phase jitter by about 20%.

Accession Number: WOS:000856135000121

Conference Title: Joint Conference of the European-Frequency-and-Time-Forum / IEEE International Frequency Control Symposium (EFTF/IFCS)

Conference Date: APR 24-28, 2022

Conference Location: Paris, FRANCE

Conference Sponsors: IEEE, European Frequency & Time Forum, SFMC, IEEE Ultroson, Ferroelectr & Frequency Control Soc

Author Identifiers:

ISSN: 2327-1914

ISBN: 978-1-6654-9718-3

Record 21 of 59

Title: Modeling the modulation transfer function measurement system of large aperture space cameras

Author(s): Liu, SK (Liu, ShangKuo); Wang, ZF (Wang, Zhengfeng); Cao, K (Cao, Kun); Wang, T (Wang, Tao); Zhou, Y (Zhou, Yan); Zhao, JK (Zhao, Jianke); Yao, BL (Yao, Baoli)

Edited by: Tan J; Luo X; Huang M; Kong L; Zhang D

Source: SEVENTH ASIA PACIFIC CONFERENCE ON OPTICS MANUFACTURE (APCOM 2021)  Book Series: Proceedings of SPIE  Volume: 12166  Article Number: 1216639  DOI: 10.1117/12.2616315  Published: 2022  

Abstract: Large aperture space cameras are widely used in high-resolution remote sensing, ultra-weak space targets detection, high-precision astronomical observation, etc. Modulation transfer function (MTF) can directly reflect the information transmission ability of a space camera. Usually, the image quality of a camera is evaluated by measuring its MTF. The MTF of a space camera needs to be measured during alignment of the optical system and electronic system, preset of the vacuum focus position, mechanical experiment, thermal experiment, etc. This paper suggests a method to model the imaging chain of large aperture space camera MTF measurement systems. The model comprehensively considers the factors of the aberration of the collimator, air turbulence, temperature variation, gravity, and environmental vibration. We calibrate the aberration of the collimator, air turbulence, temperature variation, and gravity induced error by measuring the corresponding wavefront error with a 4D laser interferometer. A star point target is placed in the focus position of the collimator to calibrate the environmental vibration through extracting the centroids of the point target images captured by the space camera. The impacts of the previous factors on the MTF measurement results of the space camera are obtained with the proposed model and the corresponding calibration data. The proposed method can evaluate the impacts of different factors on the MTF measurement results and can guide the measurement of large aperture space camera MTF.

Accession Number: WOS:000799210000110

Conference Title: 7th Asia Pacific Conference on Optics Manufacture (APCOM)

Conference Date: OCT 28-31, 2021

Conference Location: Shanghai, PEOPLES R CHINA

Conference Sponsors: Chinese Soc Opt Engn, Adv Opt Mfg Youth Expert Comm, CAS, Inst Opt & Elect, CAS, Shanghai Inst Opt & Fine Mech, CAS, Xian Inst Opt & Precis Mech, China Acad Engn Phys, Inst Machinery Mfg Technol, Beijing Inst Space Mech & Elect, Hong Kong Polytechn Univ, State Key Lab Ultra Precis Machining Technol, Shanghai Jiao Tong Univ, Sch Mech Engn, Fudan Univ, Shanghai Engn Res Ctr Ultra Precis Opt Mfg, Shanghai Engn Res Ctr Extreme Opt Mfg & Measurement, Shenzhen Univ, Shenzhen Key Lab High Performance Nontradit Mfg

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-5209-5; 978-1-5106-5208-8

Record 22 of 59

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

Author(s): Liu, YH (Liu, Yiheng); Li, LL (Li, Lili); Chen, P (Chen, Ping); Zhang, F (Zhang, Feng); Gou, YS (Gou, Yongsheng); He, K (He, Kai); Tian, JS (Tian, Jinshou)

Edited by: Zhou P

Source: ADVANCED FIBER LASER CONFERENCE, AFL2022  Book Series: Proceedings of SPIE  Volume: 12595  Article Number: 125950D  DOI: 10.1117/12.2666993  Published: 2022  

Abstract: Compton radiography is an important diagnostic tool for inertial confinement fusion (ICF), which provides important parameters about integrity, symmetry and.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.

Accession Number: WOS:001055604400012

Conference Title: Advanced Fiber Laser Conference (AFL)

Conference Date: NOV 11-13, 2022

Conference Location: Changsha, PEOPLES R CHINA

Conference Sponsors: Chinese Soc Opt Engn, Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Beijing Univ Technol, Huazhong Univ Sci & Technol, China Acad Engn Phys, Inst Chem Mat, China Acad Engn Phys, Key Lab High Energy Laser Sci & Technol, China Acad Engn Phys, Laser Fus Res Ctr, Shandong Univ, CAS, Shanghai Inst Opt & Fine Mech, Shanghai Univ, Shenzhen Technol Univ, S China Univ Technol, Tianjin Univ, Tsinghua Univ, Hunan Opt Soc, Tianjin Soc Laser Technol

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-6314-5; 978-1-5106-6315-2

Record 23 of 59

Title: Dynamical analysis and structural optimisation of angular contact ball bearing

Author(s): Luo, S (Luo Shan); Li, ZG (Li Zhiguo); Cheng, ZY (Cheng Zhiyuan)

Edited by: Jiang Y; Wang X; Wang Y; Liu D; Xue B

Source: AOPC 2022: OPTICAL SENSING, IMAGING, AND DISPLAY TECHNOLOGY  Book Series: Proceedings of SPIE  Volume: 12557  Article Number: 1255731  DOI: 10.1117/12.2652154  Published: 2022  

Abstract: Spaceborne two-dimensional turntable is the main carrier of the space camera and other optoelectronic equipment, and the stability of the thin-walled angular contact ball bearings used in its shaft system will affect the control accuracy and service life of the satellite. Research on slip rate, the deviation ratio of centroid whirl velocity and vibration of bearing with different pocket clearances, outer clearances and velocity and axial loads. For 71928AC type angular contact ball bearing, when pocket clearance is between 0.30-0.40mm, outer clearance is 1.60mm, the cage of bearing has better stability. According to the experimental results, after the parameter optimization, the bearing stability is enhanced. The research results provide a theoretical basis for the optimal design of angular contact ball bearing cages.

Accession Number: WOS:000990417500101

Conference Title: Conference on AOPC - Optical Sensing, Imaging, and Display Technology

Conference Date: DEC 18-20, 2022

Conference Location: ELECTR NETWORK

Conference Sponsors: SPIE, Chinese Soc Opt Engn, Tianjin Univ, Univ Elect Sci & Technol China, Nanjing Univ Sci & Technol, Beijing Inst Space Mech & Elect, Sci & Technol Low Light Level Night Vis Lab, Sci & Technol Electro Opt Informat Secur Control

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-6229-2

Record 24 of 59

Title: Infrared Dim Target Detecting Algorithm Based On Multi-feature And Spatio-temporal Fusion

Author(s): Mei, B (Mei, Bai); Jian, Z (Jian, Zhang); Hui, Z (Hui, Zhao)

Edited by: Tan J; Luo X; Huang M; Kong L; Zhang D

Source: SEVENTH ASIA PACIFIC CONFERENCE ON OPTICS MANUFACTURE (APCOM 2021)  Book Series: Proceedings of SPIE  Volume: 12166  Article Number: 121666W  DOI: 10.1117/12.2617906  Published: 2022  

Abstract: Focusing on the detection of infrared dim targets in space-based imaging systems, a multi-feature and spatio-temporal fusion algorithm is proposed. By analyzing characteristics of target and background in the image, firstly, an algorithm combining TOP-HAT and improved partial differentiation method is proposed for image preprocessing;Secondly, the local entropy feature and local gradient feature of the small target image are extracted from images to fuse, an improved interframe method is used for spatio-temporal fusion to enhance the target signal, then threshold segmentation is used to obtain the detection result. Theoretical analysis and experiments show that the algorithm proposed in this paper can not only suppress the background and enhance the target well;in addition, it is possible to realize the on-chip transplantation of hardware.

Accession Number: WOS:000799210000237

Conference Title: 7th Asia Pacific Conference on Optics Manufacture (APCOM)

Conference Date: OCT 28-31, 2021

Conference Location: Shanghai, PEOPLES R CHINA

Conference Sponsors: Chinese Soc Opt Engn, Adv Opt Mfg Youth Expert Comm, CAS, Inst Opt & Elect, CAS, Shanghai Inst Opt & Fine Mech, CAS, Xian Inst Opt & Precis Mech, China Acad Engn Phys, Inst Machinery Mfg Technol, Beijing Inst Space Mech & Elect, Hong Kong Polytechn Univ, State Key Lab Ultra Precis Machining Technol, Shanghai Jiao Tong Univ, Sch Mech Engn, Fudan Univ, Shanghai Engn Res Ctr Ultra Precis Opt Mfg, Shanghai Engn Res Ctr Extreme Opt Mfg & Measurement, Shenzhen Univ, Shenzhen Key Lab High Performance Nontradit Mfg

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-5209-5; 978-1-5106-5208-8

Record 25 of 59

Title: Athermalization design of compact dual-fields middle infrared optical zoom system with high-speed switching

Author(s): Mei, C (Mei Chao); Fei, JQ (Fei Jia-Qi); Ma, YJ (Ma Ying-Jun); Zhang, HW (Zhang Hong-Wei)

Edited by: Tan J; Luo X; Huang M; Kong L; Zhang D

Source: SEVENTH ASIA PACIFIC CONFERENCE ON OPTICS MANUFACTURE (APCOM 2021)  Book Series: Proceedings of SPIE  Volume: 12166  Article Number: 121661N  DOI: 10.1117/12.2612267  Published: 2022  

Abstract: Mid-wave infrared imaging has the advantages of all day, high resolution, strong adaptability to the environment, so it is widely used. In high-speed target tracking and aiming. The target flying speed is extremely fast and the DOF (depth of field) of the fixed focal lens is limited, so the zoom lens is required. In order to ensure that the tracking target will not be lost, a fast zoom requirement of no more than 0.3s is proposed. According to the requirements, a compact athermalized mid-wave infrared dual field fast zoom lens is designed. The focal length is 400 mm and 200 mm, and the passive athermalization design is adopted which can meet the working temperature of - 40 degrees to + 60 degrees. the lens can match the cooling detector with effective pixel of 640 x 512, size of 15 mu m and F / 4.The volume of the detector can be controlled in the range of L (196mm) x w (116mm) x H (185mm). The zoom group structure is considered in the design, and the switching time is less than 0.12s, and the image plane is stable when the zoom group switching.

Accession Number: WOS:000799210000058

Conference Title: 7th Asia Pacific Conference on Optics Manufacture (APCOM)

Conference Date: OCT 28-31, 2021

Conference Location: Shanghai, PEOPLES R CHINA

Conference Sponsors: Chinese Soc Opt Engn, Adv Opt Mfg Youth Expert Comm, CAS, Inst Opt & Elect, CAS, Shanghai Inst Opt & Fine Mech, CAS, Xian Inst Opt & Precis Mech, China Acad Engn Phys, Inst Machinery Mfg Technol, Beijing Inst Space Mech & Elect, Hong Kong Polytechn Univ, State Key Lab Ultra Precis Machining Technol, Shanghai Jiao Tong Univ, Sch Mech Engn, Fudan Univ, Shanghai Engn Res Ctr Ultra Precis Opt Mfg, Shanghai Engn Res Ctr Extreme Opt Mfg & Measurement, Shenzhen Univ, Shenzhen Key Lab High Performance Nontradit Mfg

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-5209-5; 978-1-5106-5208-8

Record 26 of 59

Title: Design and expected performances of the large acceptance calorimeter for the HERD space mission

Author(s): Pacini, L (Pacini, Lorenzo); Adriani, O (Adriani, Oscar); Bai, YL (Bai, Yong-Lin); Bao, TW (Bao, Tian-Wei); Berti, E (Berti, Eugenio); Bottai, S (Bottai, Sergio); Cao, WW (Cao, Wei-Wei); Casaus, J (Casaus, Jorge); Cui, XZ (Cui, Xing-Zhu); D'Alessandro, R (D'Alessandro, Raffaello); Formato, V (Formato, Valerio); Gao, JR (Gao, Jia-Rui); Li, R (Li, Ran); Liu, X (Liu, Xin); Lorusso, L (Lorusso, Leonarda); Lyu, LW (Lyu, Lin-Wei); Marin, J (Marin, Jesus); Martinez, G (Martinez, Gustavo); Pizzolotto, C (Pizzolotto, Cecilia); Qin, JJ (Qin, Jun-Jun); Quan, Z (Quan, Zheng); Shi, DL (Shi, Da-Lian); Starodubtsev, O (Starodubtsev, Oleksandr); Tang, ZC (Tang, Zhi-Cheng); Tiberio, A (Tiberio, Alessio); Vagelli, V (Vagelli, Valerio); Velasco, MA (Velasco, Miguel Angel); Wang, B (Wang, Bo); Wang, RJ (Wang, Rui-Jie); Wang, ZG (Wang, Zhi-Gang); Xu, M (Xu, Ming); Yang, Y (Yang, Yang); Zhang, L (Zhang, Li); Zheng, JK (Zheng, Jin-Kun)

Group Author(s): Herd Collaborat

Edited by: Keilhauer B

Source: 37TH INTERNATIONAL COSMIC RAY CONFERENCE, ICRC2021  Article Number: 066  Published: 2022  

Abstract: The High Energy cosmic-Radiation Detection (HERD) is a future space experiment which will be installed on the China's Space Station around 2027. The main goal of the experiment is the measurement of cosmic rays up to energies which are not explored by the instruments currently operating in space, in particular protons with energies up to PeV, nuclei up to hundreds of TeV per nucleon and electrons up to tens of TeV. HERD will consist of silicon charge detectors, anti-coincidence scintillators, scintillating fiber trackers, a transition radiation detector and a calorimeter. The latter is a homogeneous, deep, 3D segmented calorimeter made of about 7500 LYSO cubic crystals: thanks to this innovative design, it will achieve large acceptance, good energy resolution and excellent electron/proton discrimination. In order to increase both energy calibration capabilities and redundancy of the instrument, the LYSO scintillation light will be read-out by two independent systems: the first is made of wave-length shifting fibers coupled with imaged intensified CMOS cameras, and the second one consists of photodiodes with different active areas connected to a custom front-end electronics. Both read-out systems are designed to have a large dynamic range, up to 10(7), and a low power consumption. The design of the calorimeter is validated by several Monte Carlo simulations and beam test results obtained with detector prototypes. In this paper we describe the anticipated performances of the calorimeter and the current status of the double read-out system, and we discuss the recent developments of both the HERD prototype and the flight model design.

Accession Number: WOS:001070848600054

Conference Title: 37th International Cosmic Ray Conference (ICRC)

Conference Date: JUL 12-23, 2021

Conference Location: ELECTR NETWORK

Author Identifiers:

Record 27 of 59

Title: Research on the Properties of Ta₂O₅ Optical Films Prepared with APS Plasma Assisted Deposition

Author(s): Pan, YG (Pan Yong-gang); Liu, Z (Liu Zheng); Liu, WC (Liu Wen-cheng); Li, MA (Li Mian); Zhang, SB (Zhang Si-bao); Luo, CX (Luo Chang-xin); Zhang, CJ (Zhang Chun-juan)

Edited by: Tan J; Luo X; Huang M; Kong L; Zhang D

Source: SEVENTH ASIA PACIFIC CONFERENCE ON OPTICS MANUFACTURE (APCOM 2021)  Book Series: Proceedings of SPIE  Volume: 12166  Article Number: 1216602  DOI: 10.1117/12.2604831  Published: 2022  

Abstract: Ta2O5 thin films are widely used in optical and microelectronic industry because of its superior optical and mechanical properties. In this paper, single-layer Ta2O5 thin films were prepared by APS plasma assisted electron beam evaporation deposition. Based on the theory of ion energy transfer, the selection criteria of APS process parameters were established. By optimizing APS source parameters, Ta2O5 thin films with different characteristics were prepared. The spectral and refractive index dispersion of Ta2O5 thin films were analyzed by Cary7000 spectrophotometer. The stress and surface roughness of Ta2O5 films were analyzed by Zygo interferometer. Experiment and analysis results showed that the characteristics of Ta2O5 thin films are closely related to APS plasma assisted processing parameters. The discharge current and bias voltage of APS source have great influence on the stress and surface roughness of Ta2O5 thin films, but have little influence on the spectral characteristics and refractive index dispersion. The influences of preparation parameters on the properties of Ta2O5 thin films were analyzed and optimization fabrication parameters were obtained.

Accession Number: WOS:000799210000001

Conference Title: 7th Asia Pacific Conference on Optics Manufacture (APCOM)

Conference Date: OCT 28-31, 2021

Conference Location: Shanghai, PEOPLES R CHINA

Conference Sponsors: Chinese Soc Opt Engn, Adv Opt Mfg Youth Expert Comm, CAS, Inst Opt & Elect, CAS, Shanghai Inst Opt & Fine Mech, CAS, Xian Inst Opt & Precis Mech, China Acad Engn Phys, Inst Machinery Mfg Technol, Beijing Inst Space Mech & Elect, Hong Kong Polytechn Univ, State Key Lab Ultra Precis Machining Technol, Shanghai Jiao Tong Univ, Sch Mech Engn, Fudan Univ, Shanghai Engn Res Ctr Ultra Precis Opt Mfg, Shanghai Engn Res Ctr Extreme Opt Mfg & Measurement, Shenzhen Univ, Shenzhen Key Lab High Performance Nontradit Mfg

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-5209-5; 978-1-5106-5208-8

Record 28 of 59

Title: Design of continuous zoom TV detection system in deep-sea

Author(s): Peng, JW (Peng, Jianwei); Zhang, GP (Zhang, Gaopeng); Chen, WN (Chen, Weining); Dong, S (Dong, Sen); Yang, HT (Yang, Hongtao)

Edited by: Tan J; Luo X; Huang M; Kong L; Zhang D

Source: SEVENTH ASIA PACIFIC CONFERENCE ON OPTICS MANUFACTURE (APCOM 2021)  Book Series: Proceedings of SPIE  Volume: 12166  Article Number: 121662A  DOI: 10.1117/12.2614623  Published: 2022  

Abstract: In order to meet the needs of TV detection in deep sea environment, a compact continuous zoom system driven by cam sleeve is studied. Through the analysis of the system indicators, the optical system of three groups of linkage zoom and rear group for focusing is selected, and the structure of cylindrical cam driving to cooperate with the cylindrical guide sliding is clarified. Based on this idea, each module of the TV detection system is designed in detail. The design method of electric iris diaphragm in the middle of the system is proposed, and the calculation process and results of zoom drive mechanism selection are given. The method of alignment of lens optical axis adjustment with theodolite and cross-reticle is put forward. With this design and adjustment process, the TV detection system can be applied to deep sea environment is finally realized. The system has a continuously variable field of view with 5.8 degrees similar to 60 degrees underwater, the F number changes from 3.5 to 16, and the whole zoom time is less than 2s. The test results show that the MTF of the center field of view at the long focal point and the short focal point are 0.4 and 0.57. Test images in laboratory and underwater scene are clear and high resolution, which shows that the imaging quality of the system is excellent. At the same time, the system is Phi 105x115mm in actual size and 860g in weight, and can be integrated into the deep-sea pressure cabin to meet the needs of deep-sea detection.

Accession Number: WOS:000799210000080

Conference Title: 7th Asia Pacific Conference on Optics Manufacture (APCOM)

Conference Date: OCT 28-31, 2021

Conference Location: Shanghai, PEOPLES R CHINA

Conference Sponsors: Chinese Soc Opt Engn, Adv Opt Mfg Youth Expert Comm, CAS, Inst Opt & Elect, CAS, Shanghai Inst Opt & Fine Mech, CAS, Xian Inst Opt & Precis Mech, China Acad Engn Phys, Inst Machinery Mfg Technol, Beijing Inst Space Mech & Elect, Hong Kong Polytechn Univ, State Key Lab Ultra Precis Machining Technol, Shanghai Jiao Tong Univ, Sch Mech Engn, Fudan Univ, Shanghai Engn Res Ctr Ultra Precis Opt Mfg, Shanghai Engn Res Ctr Extreme Opt Mfg & Measurement, Shenzhen Univ, Shenzhen Key Lab High Performance Nontradit Mfg

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-5209-5; 978-1-5106-5208-8

Record 29 of 59

Title: Study on assembly process of flexible support mirror based on adhesive technology

Author(s): Peng, W (Peng, Wang); Kang, SF (Kang Shi-fa); Zheng, XK (Zheng Xiang-ke); Bo, G (Bo, Geng); Wei, W (Wei, Wang)

Edited by: Tan J; Luo X; Huang M; Kong L; Zhang D

Source: SEVENTH ASIA PACIFIC CONFERENCE ON OPTICS MANUFACTURE (APCOM 2021)  Book Series: Proceedings of SPIE  Volume: 12166  Article Number: 121662P  DOI: 10.1117/12.2615620  Published: 2022  

Abstract: In the assembly of space camera, the assembly of large aperture mirror is the key of the system assembly. In this paper, the flexible supported mirror of space camera is taken as the research object, and a process route is proposed to complete the micro-stress assembly of the mirror and the transmission from optical datum to mechanical datum at one time by taking the adhesive assembly of the mirror and the transmission from optical datum to mechanical datum into consideration. According to this process route, the assembly process design and installation platform construction are completed. In addition, the factors affecting the micro-stress assembly of the mirror are analyzed theoretically and experimentally, and the transfer accuracy of the optical-mechanical reference is analyzed. This process method has been successfully applied to the assembly of a space camera's primary mirror. After the assembly, the shape of the primary mirror RMS is less than lambda/50, and the Angle between the optical axis and the normal of the structure's mounting surface is less than 10 ''.The process method presented in this paper provides a technical reference for the assembly of similar optical-mechanical systems.

Accession Number: WOS:000799210000094

Conference Title: 7th Asia Pacific Conference on Optics Manufacture (APCOM)

Conference Date: OCT 28-31, 2021

Conference Location: Shanghai, PEOPLES R CHINA

Conference Sponsors: Chinese Soc Opt Engn, Adv Opt Mfg Youth Expert Comm, CAS, Inst Opt & Elect, CAS, Shanghai Inst Opt & Fine Mech, CAS, Xian Inst Opt & Precis Mech, China Acad Engn Phys, Inst Machinery Mfg Technol, Beijing Inst Space Mech & Elect, Hong Kong Polytechn Univ, State Key Lab Ultra Precis Machining Technol, Shanghai Jiao Tong Univ, Sch Mech Engn, Fudan Univ, Shanghai Engn Res Ctr Ultra Precis Opt Mfg, Shanghai Engn Res Ctr Extreme Opt Mfg & Measurement, Shenzhen Univ, Shenzhen Key Lab High Performance Nontradit Mfg

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-5209-5; 978-1-5106-5208-8

Record 30 of 59

Title: A Review of the Research on the Measurement Methods of the Sub-reflector of Large Aperture Radio Telescopes

Author(s): Qiao, J (Qiao, Jiang); Lin, SM (Lin, Shangmin); Wang, H (Wang, Hu); Jin, Y (Jin, Yu)

Book Group Author(s): IEEE

Source: 2022 IEEE 10TH ASIA-PACIFIC CONFERENCE ON ANTENNAS AND PROPAGATION, APCAP  Book Series: Asia Pacific Conference on Antennas and Propagation  DOI: 10.1109/APCAP56600.2022.10069990  Published: 2022  

Abstract: As an important electromagnetic wave signal receiving and transmitting equipment, antenna reflector is widely used in radar, communication and astronomical observation and other fields. The positional accuracy of the sub-reflector of a large aperture radio telescope is a key indicator that affects the receiving performance. This paper briefly expounds the principles and characteristics of various position measurement methods, and summarizes the main advantages and limitations of various technical solutions, providing a reference for the exploration and innovation of position and attitude measurement methods for radio telescope sub-reflectors.

Accession Number: WOS:000982814000396

Conference Title: IEEE 10th Asia-Pacific Conference on Antennas and Propagation (APCAP)

Conference Date: NOV 04-07, 2022

Conference Location: Xiamen, PEOPLES R CHINA

Conference Sponsors: IEEE, Xiamen Inst Elect, Chinese Inst Elect, Antenna Soc, S China Univ Technol, Xiamen Univ, SE Univ, Fuzhou Univ, JiMei Univ, ANT, Univ Amoiensis, APS MTT S EMC Soc Joint Nanjing Chapter

ISSN: 2381-5523

ISBN: 978-1-6654-8954-6

Record 31 of 59

Title: Research on Clustering Algorithm of Hyperspectral Images Based on Fuzzy Kernel P System

Author(s): Qiu, S (Qiu, Shi); Zhang, G (Zhang, Geng); Zhang, M (Zhang, Miao)

Edited by: Zhao J; Fan Y; Bagheri E; Fuhr N; Takasu A

Source: 2022 IEEE/WIC/ACM INTERNATIONAL JOINT CONFERENCE ON WEB INTELLIGENCE AND INTELLIGENT AGENT TECHNOLOGY, WI-IAT  Pages: 731-737  DOI: 10.1109/WI-IAT55865.2022.00116  Published: 2022  

Abstract: According to the difficulty of spectral image clustering, an image clustering algorithm is proposed based on fuzzy kernel P system. Through the analysis of fuzzy clustering and kernel clustering, the fuzzy kernel system is built to optimize the organizational P system, and all cells are coordinated to calculate the optimal clustering center in the mapping space to achieve parallel computing. It can reduce the sensitivity of the initial clustering center, improve the global search ability of the algorithm, avoid falling into the local minimum, and improve the clustering performance of the algorithm.

Accession Number: WOS:000990549100106

Conference Title: IEEE/WIC/ACM International Joint Conference on Web Intelligence and Intelligent Agent Technology (WI-IAT)

Conference Date: NOV 17-20, 2022

Conference Location: ELECTR NETWORK

Conference Sponsors: IEEE, IEEE Comp Soc Tech Comm Intelligent Informat, Web Intelligence Consortium, Assoc Comp Machinery, Wilfrid Laurier Univ, York Univ, IOS Press

ISBN: 978-1-6654-9402-1

Record 32 of 59

Title: Correlation filter tracking algorithms against interference of similar object and fast motion

Author(s): Ren, SX (Ren, Sixi); Tian, Y (Tian, Yan); Xu, ZH (Xu, Zhaohui); Guo, M (Guo, Min)

Edited by: Jiang Y; Wang X; Wang Y; Liu D; Xue B

Source: AOPC 2022: OPTICAL SENSING, IMAGING, AND DISPLAY TECHNOLOGY  Book Series: Proceedings of SPIE  Volume: 12557  Article Number: 125570Y  DOI: 10.1117/12.2649713  Published: 2022  

Abstract: fDSST (fast Discriminative Scale Space Tracking) belongs to correlation filter tracking algorithm, which has high success rate and precision, also runs at a fast speed. However, it is still a huge challenge for the tracking scene of fast motion and similar object interference. In order to improve the performance of fDSST on the challenges above, this paper proposed fDSSTs algorithm and fDSSTss algorithm respectively. fDSSTs increases the response scores near the object location by fusing the fhog feature and the color statistical feature, so improved the tracking performance of fDSST in the fast moving scene. fDSSTss adds a multi-feature object association module on the basis of fDSST, which distinguishes the real object and the interference object from the object feature level, thereby maintaining the tracking of the real object. The fDSSTs is tested on the OTB50 dataset, in fast-moving scenarios, the success rate of fDSST is improved by 20.5% and the precision is improved by 22.8% compared with fDSST. The fDSSTss is tested on the test sequences of similar object interference, and the result shows that fDSSTss has better anti-similar object interference ability than fDSST, while meeting the real-time requirements. The experiments show that the improvements improve the success rate and precision of fDSST in fast object moving scenes, as well as the ability to resist similar object interference.

Accession Number: WOS:000990417500029

Conference Title: Conference on AOPC - Optical Sensing, Imaging, and Display Technology

Conference Date: DEC 18-20, 2022

Conference Location: ELECTR NETWORK

Conference Sponsors: SPIE, Chinese Soc Opt Engn, Tianjin Univ, Univ Elect Sci & Technol China, Nanjing Univ Sci & Technol, Beijing Inst Space Mech & Elect, Sci & Technol Low Light Level Night Vis Lab, Sci & Technol Electro Opt Informat Secur Control

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-6229-2

Record 33 of 59

Title: Research on data processing method for detection of small and weak targets in space

Author(s): Sen, T (Sen, Tian); Yan, W (Yan, Wen)

Edited by: Jiang Y; Wang X; Wang Y; Liu D; Xue B

Source: AOPC 2022: OPTICAL SENSING, IMAGING, AND DISPLAY TECHNOLOGY  Book Series: Proceedings of SPIE  Volume: 12557  Article Number: 1255729  DOI: 10.1117/12.2652025  Published: 2022  

Abstract: Space debris identification and localization has been studied for a long time at home and abroad, but there are still shortcomings in the detection of very low SNR small targets, especially the detection and recognition of very low SNR faint small targets submerged in the dense galactic background Stars in order to effectively target detection, background removal is essential, in order to distinguish between the target and the stars, through the accumulation of judgement block number of star closely adjacent to judge, if the judgment of the block, star closely adjacent number more than set threshold, so that the point for stars, on the other hand, argue that point as the goal to be detected, then, to the star point of the block The results of the algorithm show that, according to different star map images, the size of matrix block and the threshold of star point can be modified to achieve better star removal effect.

Accession Number: WOS:000990417500075

Conference Title: Conference on AOPC - Optical Sensing, Imaging, and Display Technology

Conference Date: DEC 18-20, 2022

Conference Location: ELECTR NETWORK

Conference Sponsors: SPIE, Chinese Soc Opt Engn, Tianjin Univ, Univ Elect Sci & Technol China, Nanjing Univ Sci & Technol, Beijing Inst Space Mech & Elect, Sci & Technol Low Light Level Night Vis Lab, Sci & Technol Electro Opt Informat Secur Control

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-6229-2

Record 34 of 59

Title: A New Medical Image Transfer and Process Platform

Author(s): Shen, C (Shen, Chao); Li, W (Li, Wei); Huang, C (Huang, Chao); Gao, W (Gao, Wei)

Edited by: Jiang Y; Wang X; Wang Y; Liu D; Xue B

Source: AOPC 2022: OPTICAL SENSING, IMAGING, AND DISPLAY TECHNOLOGY  Book Series: Proceedings of SPIE  Volume: 12557  Article Number: 1255707  DOI: 10.1117/12.2643681  Published: 2022  

Abstract: This paper designs a new platform for medical image transfer and process. The hardware part of the platform is based on FPGA, USB and RS232. The software part is based on Windows platform, basing on MFC dialog application developed with C + + programming tools in Microsoft Visual Studio 2010. The platform collects images from medical devices and uses the hardware platform to transmit them to PC for display, the application program on PC can realize the image data process and analysis.

Accession Number: WOS:000990417500004

Conference Title: Conference on AOPC - Optical Sensing, Imaging, and Display Technology

Conference Date: DEC 18-20, 2022

Conference Location: ELECTR NETWORK

Conference Sponsors: SPIE, Chinese Soc Opt Engn, Tianjin Univ, Univ Elect Sci & Technol China, Nanjing Univ Sci & Technol, Beijing Inst Space Mech & Elect, Sci & Technol Low Light Level Night Vis Lab, Sci & Technol Electro Opt Informat Secur Control

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-6229-2

Record 35 of 59

Title: Design and testing of the structure of the eXTP optics

Author(s): Song, ZY (Song, Z. Y.); Ma, J (Ma, J.); Wang, J (Wang, J.); Zhang, A (Zhang, A. M.); Wang, YS (Wang, Y. S.); Yang, YJ (Yang, Y. J.); Jiang, WC (Jiang, W. C.); Chen, Y (Chen, Y.); Yu, K (Yu, K.); Yang, S (Yang, S.); Xu, YP (Xu, Y. P.); He, HL (He, H. L.); Lu, FJ (Lu, F. J.); Zhang, SN (Zhang, S. N.); Basso, S (Basso, S.); Civitani, M (Civitani, M.); Pareschi, G (Pareschi, G.); Sironi, G (Sironi, G.); Spiga, D (Spiga, D.); Cotroneo, V (Cotroneo, V); Tagliaferri, G (Tagliaferri, G.); Sheng, LZ (Sheng, L. Z.); Yan, YQ (Yan, Y. Q.); Qiang, PF (Qiang, P. F.); Zhao, BS (Zhao, B. S.)

Edited by: DenHerder JWA; Nikzad S; Nakazawa K

Source: SPACE TELESCOPES AND INSTRUMENTATION 2022: ULTRAVIOLET TO GAMMA RAY  Book Series: Proceedings of SPIE  Volume: 12181  Article Number: 121816C  DOI: 10.1117/12.2629781  Published: 2022  

Abstract: The abbreviation "eXTP" represents the enhanced X-ray timing and polarimetry, which is a key science mission initiated by the Chinese scientists, designed to study the state of matter under extreme conditions of density, gravity and magnetism [1]. Various payloads would be on board of the satellite. The SFA, namely the Spectroscopy Focusing Array, consisting of 9 identical X-ray telescopes working in the energy range of 0.5-10 keV, will be the focus here [1]. SFA has a field-ofview of 12 arcmin for each and a collecting area of 900 cm(2) and 550 cm(2) for each at 2 keV and 6 keV respectively [1].
This paper starts with a brief introduction of the general optics, and then goes across some important design aspects. It covers contents from the structural and thermal designs to the CAE analyses as well as the current status. The large diameter and huge focal length of the optics will definitely bring big issues to the robustness of the carrying structure under the severe conditions given by the launcher.
According to the current design, the mirror assembly will have 3 feet and 24 spokes. Vibration tests were already performed on a few prototypes by IHEP, and a preliminary evaluation on the feasibility of the design has been achieved. It clearly stated that the current design with only a single spider can probably survive the vibration tests assuming a compromised test condition somewhere. CAE models were adjusted thereafter to match the test results, which could be used for further assessments in a near future.
Of course, there are always uncertainties associated with our arguments. More detailed prototypes with mechanically fully representative shells were still under design. Hopefully, highly reliable results could be retrieved soon.

Accession Number: WOS:000865607100149

Conference Title: Conference on Space Telescopes and Instrumentation - Ultraviolet to Gamma Ray Part of SPIE Astronomical Telescopes and Instrumentation Conference

Conference Date: JUL 17-22, 2022

Conference Location: Montreal, CANADA

Conference Sponsors: SPIE

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-5344-3; 978-1-5106-5343-6

Record 36 of 59

Title: Camera Design and Performance for the Earth 2.0 Mission

Author(s): Song, ZX (Song, Zongxi); Li, W (Li, Wei); Wang, FT (Wang, Fengtao); Cheng, PF (Cheng, Pengfei); Shen, C (Shen, Chao); Pan, Y (Pan, Yue); Gao, W (Gao, Wei); Li, Y (Li, Yan); Zhang, H (Zhang, Hui); Ge, J (Ge, Jian)

Edited by: Coyle LE; Matsuura S; Perrin MD

Source: SPACE TELESCOPES AND INSTRUMENTATION 2022: OPTICAL, INFRARED, AND MILLIMETER WAVE  Book Series: Proceedings of SPIE  Volume: 12180  Article Number: 121804B  DOI: 10.1117/12.2630652  Published: 2022  

Abstract: The Earth 2.0 (ET) mission is a Chinese space mission to detect thousands of Earth-sized terrestrial planets, including habitable Earth-like planets orbiting solar type stars (Earth 2.0s), cold low-mass planets, and free-floating planets. The six 30 cm diameter transit telescopes will be equipped with a CMOS camera which consists of 4(2x2) 9Kx9K CMOS sensors. A prototype camera with a 8900x9120 pixel GSENSE 1081 BSI type CMOS sensor and temperature control is designed and developed for high precision photometry measurements. In this paper, details of this camera design and performance test results are reported.

Accession Number: WOS:000865466600124

Conference Title: Conference on Space Telescopes and Instrumentation - Optical, Infrared, and Millimeter Wave

Conference Date: JUL 17-22, 2022

Conference Location: Montreal, CANADA

Conference Sponsors: SPIE

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-5342-9

Record 37 of 59

Title: Design and Development of WFOS, the Wide-Field Optical Spectrograph for the Thirty Meter Telescope

Author(s): Steidel, C (Steidel, Charles); Peng, E (Peng, Eric); Fucik, J (Fucik, Jason); Nash, R (Nash, Reston); Kaye, S (Kaye, Stephen); Jacoby, G (Jacoby, George); Delabre, B (Delabre, Bernard); Sethuram, R (Sethuram, Ramya); Divakar, D (Divakar, Devika); Varshney, HM (Varshney, Hari Mohan); Thirupathi, S (Thirupathi, Sivarani); Uraguchi, F (Uraguchi, Fumihiro); Ozaki, S (Ozaki, Shinobu); Ji, HX (Ji, Hangxin); Lv, T (Lv, Tao); Chiu, K (Chiu, Kent); Zhu, QF (Zhu, Qingfeng); Andersen, D (Andersen, David); Miles, J (Miles, John); Lasi, D (Lasi, Davide)

Edited by: Evans CJ; Bryant JJ; Motohara K

Source: GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY IX  Book Series: Proceedings of SPIE  Volume: 12184  Article Number: 1218423  DOI: 10.1117/12.2629464  Published: 2022  

Abstract: We present the current design of WFOS, a wide-field UV/optical (0.31-1.0 mu m) imaging spectrograph planned for first-light on the TMT International Observatory 30 m telescope. WFOS is optimized for high sensitivity across the entire optical waveband for low-to-moderate resolution (R similar to 1500-5000) long-slit and multi-slit spectroscopy of very faint targets over a contiguous field of view of 8'.3x3'.0 at the f/15 Nasmyth focus of TMT. A key design goal for WFOS is stability and repeatability in all observing modes, made possible by its gravity-invariant opto-mechanical structure, with a vertical rotation axis and all reconfigurable components moving only in planes defined by tiered optical benches parallel to the Nasmyth platform. WFOS's optics include a linear ADC correcting a 9' diameter field, including both the science FoV and 4 patrolling acquisition, guiding, and wavefront sensing camera systems; a novel 2-mirror reflective collimator allowing the science FoV to be centered on the telescope optical axis; a dichroic beamsplitter dividing the collimated beam into 2 wavelength-optimized spectrometer channels (blue: 0.31-0.56 mu m; red: 0.54-1.04 mu m); selectable transmissive dispersers (VPH and/or VBG) with remotely configurable grating tilt (angle of incidence) and camera articulation that enable optimization of diffraction efficiency and wavelength coverage in each channel; all-refractive, wavelength-optimized f/2 spectrograph cameras, and UV/blue and red-optimized detector systems. The predicted instrumental throughput of WFOS for spectroscopy averages > 56% over the full 0.31-1 mu m range, from the ADC to the detector. When combined with the 30 m TMT aperture, WFOS will realize a factor of similar to 20 gain in sensitivity compared to the current state of the art on 8-10 m-class telescopes.

Accession Number: WOS:000860684700054

Conference Title: Conference on Ground-Based and Airborne Instrumentation for Astronomy IX

Conference Date: JUL 17-22, 2022

Conference Location: Montreal, CANADA

Conference Sponsors: SPIE

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-5350-4; 978-1-5106-5349-8

Record 38 of 59

Title: RF and microwave photonic signal generation and processing based on Kerr micro-combs

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

Edited by: Sadwick LP; Yang T

Source: TERAHERTZ, RF, MILLIMETER, AND SUBMILLIMETER-WAVE TECHNOLOGY AND APPLICATIONS XV  Book Series: Proceedings of SPIE  Volume: 12000  Article Number: 120000C  DOI: 10.1117/12.2607905  Published: 2022  

Abstract: We demonstrate a radio frequency (RF) phase-encoded signal generator as well as a user-defined RF arbitrary waveform generator (AWG) based on a soliton crystal micro-comb generated by an integrated MRR with a free spectral range of similar to 49 GHz. Owing to the soliton crystal's robust and stable generation as well as the high intrinsic efficiency, RF phase-encoded signal generators and AWGs with simple operation and fast reconfiguration are realized. The soliton crystal micro-comb provides 60 wavelengths for RF phase-encoded signal generators, achieving a phase encoding speed of 5.95 Gb/s and a high pulse compression ratio of 29.6. Over 80 wavelengths are employed for the AWGs, achieving tunable square waveforms with a duty cycle ratio ranging from 10% to 90%, sawtooth waveforms with tunable slope ratios from 0.2 to 1, and symmetric concave quadratic chirp waveforms. Our system has great potential to achieve RF and microwave photonic signal generation and processing with low cost and footprint.

Accession Number: WOS:000812254600010

Conference Title: Conference on Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XV

Conference Date: JAN 22-FEB 28, 2022

Conference Location: San Francisco, CA

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-4872-2; 978-1-5106-4871-5

Record 39 of 59

Title: Interpretation of Interstitial Lung Diseases from Magnetic Resonance Image using deep learning

Author(s): Tang, ZJ (Tang, Zijia); Li, XJ (Li, Xijie)

Book Group Author(s): IEEE

Source: 2022 INTERNATIONAL CONFERENCE ON ADVANCED ENTERPRISE INFORMATION SYSTEM, AEIS  Pages: 146-151  DOI: 10.1109/AEIS59450.2022.00027  Published: 2022  

Abstract: Usual interstitial pneumonia (UIP) and nonspecific interstitial pneumonia (NSIP) shared similar patterns in medical images but had different treatments and outcomes. This study presented an automatically distinguishable tool, named ConvT, using deep learning methods to help the clinicians differentiate NSIP from UIP based on MRI images. ConvT employed a CNN feature extractor and a cross-view transformer to classify the biomedical patterns that indicate NSIP or UIP. The experiment in a dataset with over 417 MRI T2WI images showed ConvT had 97.62% accuracy and 0.9767 F1 scores in the classification task. The visualization of ConvT illustrated that the proposed model can correctly identify the specific patterns of both NSIP and UIP.

Accession Number: WOS:001012673800020

Conference Title: 2nd International Conference on Advanced Enterprise Information System (AEIS)

Conference Date: DEC 02-04, 2022

Conference Location: London, ENGLAND

ISBN: 979-8-3503-2437-2

Record 40 of 59

Title: Athermalization of star sensor optical system with large field of view and low distortion

Author(s): Wang, XY (Wang Xingyan); Wang, H (Wang Hu); Shen, Y (Shen Yang); Ma, ZH (Ma Zehua); Yan, HY (Yan Haoyu)

Edited by: Jiang Y; Wang X; Wang Y; Liu D; Xue B

Source: AOPC 2022: OPTICAL SENSING, IMAGING, AND DISPLAY TECHNOLOGY  Book Series: Proceedings of SPIE  Volume: 12557  Article Number: 125571N  DOI: 10.1117/12.2651770  Published: 2022  

Abstract: Star sensor is the key measurement equipment for satellite positioning and spacecraft attitude control. It provides highprecision measurement data for spacecraft attitude control and astronomical navigation. In order to realize the accurate measurement of star positioning and spacecraft attitude by star sensor in the environment with large temperature difference in space, according to the thermal compensation theory, an athermal star sensor lens with wide band, large field of view, low distortion is designed, which can work in wide temperature range. The working band is 450nm similar to 850nm, the F number is 1.5, the field angle is 20 degrees, and the diameter of the pupil is 30mm. The analysis results show that the relative distortion of the system is less than 0.06%, the lateral aberration of the full field is less than 3.7 mu m, the surrounding full field-of-view energy ratio within f20mm is large than 80%, and temperature range is -50. similar to 60.. The change of relative distortion, lateral aberration, energy concentration and other indicators relative to 20. is no more than +/- 10%, which fully meets the application requirements of high-precision star sensor in space environment.

Accession Number: WOS:000990417500053

Conference Title: Conference on AOPC - Optical Sensing, Imaging, and Display Technology

Conference Date: DEC 18-20, 2022

Conference Location: ELECTR NETWORK

Conference Sponsors: SPIE, Chinese Soc Opt Engn, Tianjin Univ, Univ Elect Sci & Technol China, Nanjing Univ Sci & Technol, Beijing Inst Space Mech & Elect, Sci & Technol Low Light Level Night Vis Lab, Sci & Technol Electro Opt Informat Secur Control

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-6229-2

Record 41 of 59

Title: Research on Active Disturbance Rejection Control of Voice Coil Motor Based on Improved Particle Swarm Optimization

Author(s): Wang, ZY (Wang, ZiYuan); Ge, W (Ge, Wei)

Edited by: Jiang Y; Wang X; Wang Y; Liu D; Xue B

Source: AOPC 2022: OPTICAL SENSING, IMAGING, AND DISPLAY TECHNOLOGY  Book Series: Proceedings of SPIE  Volume: 12557  Article Number: 125572Z  DOI: 10.1117/12.2651636  Published: 2022  

Abstract: As a high-precision position actuator, the voice coil motor (VCM) is widely used in technology of segmented mirror and mirror shape correction in space telescope. In response to the adverse effects of internal and external disturbances on the precision positioning of the VCM, an improved particle swarm optimization (PSO) based active disturbance rejection control (ADRC) VCM position control model is proposed in this paper. Our model is able to present a reasonable solution to the problem that ADRC has numerous parameters which are knotty to configure. In order to prevent precocious convergence or falling into local optimal, a variable weight factor search method is proposed. MATLAB and Simulink are employed for co-simulation and control experiment are designed. The simulation results show that compared with traditional PID control, the control model designed in this paper has better dynamic performance, higher tracking accuracy and better disturbance rejection performance, and it is suitable for high-precision position control under complex environment with a bright engineering application prospect.

Accession Number: WOS:000990417500099

Conference Title: Conference on AOPC - Optical Sensing, Imaging, and Display Technology

Conference Date: DEC 18-20, 2022

Conference Location: ELECTR NETWORK

Conference Sponsors: SPIE, Chinese Soc Opt Engn, Tianjin Univ, Univ Elect Sci & Technol China, Nanjing Univ Sci & Technol, Beijing Inst Space Mech & Elect, Sci & Technol Low Light Level Night Vis Lab, Sci & Technol Electro Opt Informat Secur Control

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-6229-2

Record 42 of 59

Title: Design and optimization research of φ 1.6m space mirror and its supporting structure

Author(s): Wei, DJ (Wei De Jing); Wang, W (Wang Wei); Hu, B (Hu Bin); Lin, SM (Lin Shang Min); Cheng, PF (Cheng Peng Fei)

Edited by: Jiang Y; Wang X; Wang Y; Liu D; Xue B

Source: AOPC 2022: OPTICAL SENSING, IMAGING, AND DISPLAY TECHNOLOGY  Book Series: Proceedings of SPIE  Volume: 12557  Article Number: 1255730  DOI: 10.1117/12.2651768  Published: 2022  

Abstract: This article aiming at the high performance requirements of the space camera mirror assembly, and in order to ensure that the space camera main mirror has good surface shape accuracy and high first-order natural frequency, the mirror and flexible support structure are studied and designed. First, according to the selection principle of the mirror material, SiC is selected as the mirror blank material of the mirror. According to the empirical formula, the three-point support scheme on the back of the mirror and the structural size parameters of the mirror body are determined. And a flexible support structure with multi-axis flexible hinge and dual-axis flexible hinge in series is designed for the mirror. Finally, the parameter optimization method is used to optimize the position radius of the mirror back support hole and the key dimensions of the flexible structure.The static analysis and modal analysis of the mirror assembly were carried out using the finite element method. The results show that the surface shape accuracy of the mirror is 0.015 lambda nm, the first-order natural frequency of the mirror is 145.57Hz, the weight is 135.35Kg, and the lightweight rate is 87.57%.

Accession Number: WOS:000990417500100

Conference Title: Conference on AOPC - Optical Sensing, Imaging, and Display Technology

Conference Date: DEC 18-20, 2022

Conference Location: ELECTR NETWORK

Conference Sponsors: SPIE, Chinese Soc Opt Engn, Tianjin Univ, Univ Elect Sci & Technol China, Nanjing Univ Sci & Technol, Beijing Inst Space Mech & Elect, Sci & Technol Low Light Level Night Vis Lab, Sci & Technol Electro Opt Informat Secur Control

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-6229-2

Record 43 of 59

Title: Infrared small target detection algorithm based on entropy weighted multiscale local contrast

Author(s): Wei, JB (Wei, Jingbo); Chen, RL (Chen, Rongli); Zhang, XM (Zhang, Ximing); Zhao, H (Zhao, Hui)

Edited by: Jiang Y; Wang X; Wang Y; Liu D; Xue B

Source: AOPC 2022: OPTICAL SENSING, IMAGING, AND DISPLAY TECHNOLOGY  Book Series: Proceedings of SPIE  Volume: 12557  Article Number: 125570U  DOI: 10.1117/12.2648172  Published: 2022  

Abstract: It is an important and challenging topic to deal with infrared small target detection with high detection rate, low false alarm rate and low computational complexity in various application fields. Aiming at solving the problem that the existing algorithms can not effectively enhance the real foreground target and suppress various complex background interference. This paper proposes an infrared small target detection algorithm based on entropy weighted multiscale local contrast. Firstly, the local contrast formula is redefined in the joint form of ratio and difference, which can enhance the target and suppress the background clutter. Secondly, the local entropy can be used to reflect the gray mutation in the local area of the image. We use the modified local entropy operator to weight the multiscale local contrast. Finally, we employ the adaptive threshold segmentation to separate the target from the background and obtain the final infrared small target. We test six groups of infrared image sequences with different targets and backgrounds, the backgrounds include mountain, forest, field, sea-sky, sky and thick cloud. Experimental results show that, the proposed algorithm can not only robustly detect infrared dim and small targets of different sizes in various complex backgrounds, but also has higher detection efficiency and lower false alarm rate compared with other traditional baseline methods.

Accession Number: WOS:000990417500025

Conference Title: Conference on AOPC - Optical Sensing, Imaging, and Display Technology

Conference Date: DEC 18-20, 2022

Conference Location: ELECTR NETWORK

Conference Sponsors: SPIE, Chinese Soc Opt Engn, Tianjin Univ, Univ Elect Sci & Technol China, Nanjing Univ Sci & Technol, Beijing Inst Space Mech & Elect, Sci & Technol Low Light Level Night Vis Lab, Sci & Technol Electro Opt Informat Secur Control

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-6229-2