Record 1 of 86

Title: Hardware Design of an Image Acquisition Device for Target Observation and Tracking

Author(s): Bian, H (Bian, He); Zhang, HF (Zhang, Haifeng); Wang, H (Wang, Hua); Huang, JJ (Huang, Jijiang)

Book Group Author(s): IOP

Source: 2020 ASIA CONFERENCE ON GEOLOGICAL RESEARCH AND ENVIRONMENTAL TECHNOLOGY  Book Series: IOP Conference Series-Earth and Environmental Science  Volume: 632  Article Number: 042043  DOI: 10.1088/1755-1315/632/4/042043  Published: 2021  

Abstract: In order to observe and track the separated targets in the air, This paper presents a hardware image acquisition platform based on three-way camera + FPGA + two-way DSP, Xilinx artix-7 series xc7a200t-2fbg676i FPGA is used as the main processor. It is mainly responsible for high-speed image acquisition, preprocessing, transmission and display, TMS320DM368 DSP of Texas Instruments is used as image compression processor. After receiving the image transmitted by artix-7 FPGA, the image H.264 is compressed. This architecture solves the delay problem of traditional image acquisition system in hardware architecture level, and realizes the real-time and high-speed image acquisition and processing. At the same time, the hardware has the basis of multi-channel image acquisition, multi-channel image compression, visible light and infrared camera acquisition data fusion.

Accession Number: WOS:000688420701083

Conference Title: Asia Conference on Geological Research and Environmental Technology (GRET)

Conference Date: OCT 10-11, 2020

Conference Location: ELECTR NETWORK

Author Identifiers:

ISSN: 1755-1307

Record 2 of 86

Title: Optical system design of polarization imaging spectrometer based on aperture division

Author(s): Chang, LY (Chang Lingying); Pan, Q (Pan Qian); Qiu, YH (Qiu Yuehong); Zhao, BC (Zhao Baochang)

Edited by: She JB

Source: FOURTH INTERNATIONAL CONFERENCE ON PHOTONICS AND OPTICAL ENGINEERING  Book Series: Proceedings of SPIE  Volume: 11761  Article Number: 117611K  DOI: 10.1117/12.2586810  Published: 2021  

Abstract: Based on the principle of acousto-optic tunable filter and aperture division, the new method that can obtain a high spectral full polarization and image information was proposed. It was improved the accuracy of target detection and object recognition by this method. The Optical system of polarization imaging spectrometer based on aperture divisionandacousto-optic tunable filter was designed in this paper, which was used in the 2.16-meter telescope and spectral range is 450-900 nm.First,the working principle of polarization imaging spectrometer based on aperture division was introduced.Then, the design scheme of optical system and the principle of information acquisition were studied.Finally, the design parameters were assigned and theoptical systems were designed.The whole system MTF reach 0.6 in 32lp/mm.The olarization imaging spectrometer based on aperture division can improve the observation capacity.

Accession Number: WOS:000667953600055

Conference Title: 4th International Conference on Photonics and Optical Engineering

Conference Date: OCT 15-16, 2020

Conference Location: Xian, PEOPLES R CHINA

Conference Sponsors: CAS, Xian Inst Opt & Precis Mech, State Key Lab Transient Opt & Photon, Xian Technol Univ, Shaanxi Normal Univ, Xian Univ Technol, SPIE, Chinese Opt Soc, Shaanxi Opt Soc, Opt & Photon Soc Singapore, Chinese Opt Soc, High Speed Photog & Photon Comm

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-4358-1

Record 3 of 86

Title: Fully Unsupervised Person Re-Identification by Enhancing Cluster Samples

Author(s): Chen, X (Chen, Xiumei); Zheng, X (Zheng, Xiangtao); Zhu, K (Zhu, Kaijian); Lu, X (Lu, Xiaoqiang)

Book Group Author(s): ASSOC COMPUTING MACHINERY

Source: 2021 THE 7TH INTERNATIONAL CONFERENCE ON COMMUNICATION AND INFORMATION PROCESSING, ICCIP 2021  Pages: 70-73  DOI: 10.1145/3507971.3507984  Published: 2021  

Abstract: Fully unsupervised person re-identification aims to train a discriminative model with unlabeled person images. Most existing methods first generate pseudo labels by clustering image features (convolutional features) and then fine-tune the convolutional neural network (CNN) with pseudo labels. However, these methods are greatly limited by the quality of the pseudo labels. In this paper, a cluster sample enhancement method is introduced to increase the reliability of pseudo-label samples to facilitate the CNN training. Specifically, when generating pseudo labels, only the samples with high-confidence pseudo-label predictions are selected. In addition, to enhance the selected samples for training, two different image transformations are adopted and coupled with specific-design loss functions to boost the model performance. Experiments demonstrate the effectiveness of the proposed method. Concretely, the proposed method achieves 87.1% rank-1 and 70.2% mAP accuracy on Market-1501.

Accession Number: WOS:001064649100013

Conference Title: 7th International Conference on Communication and Information Processing (ICCIP)

Conference Date: DEC 16-18, 2021

Conference Location: Beijing Univ Posts & Telecommunicat, Beijing, PEOPLES R CHINA

Conference Host: Beijing Univ Posts & Telecommunicat

Author Identifiers:

ISBN: 978-1-4503-8519-0

Record 4 of 86

Title: Status of the Follow-up X-ray Telescope onboard the Einstein Probe Satellite

Author(s): Chen, Y (Chen, Yong); Cui, WW (Cui, WeiWei); Han, DW (Han, DaWei); Wang, J (Wang, Juan); Yang, YJ (Yang, YanJi); Wang, YS (Wang, YuSa); Li, W (Li, Wei); Ma, J (Ma, Jia); Xu, YP (Xu, YuPeng); Lu, FJ (Lu, FangJun); Chen, HL (Chen, HouLei); Tang, QJ (Tang, QingJun); Yuan, WM (Yuan, Weimin); Friedrich, P (Friedrich, Peter); Meidinger, N (Meidinger, Norbert); Keil, I (Keil, Isabell); Burwitz, V (Burwitz, Vadim); Eder, J (Eder, Josef); Hartmann, K (Hartmann, Katinka); Nandra, K (Nandra, Kirpal); Keereman, A (Keereman, Arnoud); Santovincenzo, A (Santovincenzo, Andrea); Vernani, D (Vernani, Dervis); Bianucci, G (Bianucci, Giovanni); Valsecchi, G (Valsecchi, Giuseppe); Wang, B (Wang, Bo); Wang, LP (Wang, LangPing); Wang, DAL (Wang, DianLong); Li, D (Li, Duo); Sheng, LZ (Sheng, LiZhi); Qiang, PF (Qiang, PengFei); Shi, RR (Shi, RongRong); Chao, XY (Chao, XiangYu); Song, ZY (Song, ZeYu); Zhang, ZL (Zhang, Ziliang); Huo, J (Huo, Jia); Wang, H (Wang, Hao); Cong, M (Cong, Min); Yang, XT (Yang, XiongTao); Hou, DJ (Hou, DongJie); Zhao, XF (Zhao, XiaoFan); Zhao, ZJ (Zhao, ZiJian); Chen, TX (Chen, TianXiang); Li, MS (Li, MaoShun); Zhang, T (Zhang, Tong); Luo, LD (Luo, LaiDan); Xu, JJ (Xu, JingJing); Li, G (Li, Gang); Zhang, Q (Zhang, Qian); Bi, XY (Bi, XiYan); Zhu, YX (Zhu, YuXuan); Yu, NA (Yu, Nian); Chen, C (Chen, Can); Lv, ZH (Lv, ZhongHua); Lu, B (Lu, Bing); Zhang, JW (Zhang, JiaWei)

Edited by: DenHerder JWA; Nikzad S; Nakazawa K

Source: SPACE TELESCOPES AND INSTRUMENTATION 2020: ULTRAVIOLET TO GAMMA RAY  Book Series: Proceedings of SPIE  Volume: 11444  Article Number: 114445B  DOI: 10.1117/12.2562311  Published: 2021  

Abstract: The Einstein Probe (EP) is an X-ray astronomical mission mainly devoting to time-domain astronomy. There are two main scientific payloads onboard EP, the Wide Field X-ray Telescope (WXT) based on the lobster eye optics and the Follow-up X-ray Telescope (FXT). FXT contains two Wolter-1 mirrors with a pnCCD detector on each focus. The total effective area is about 600 cm(2) and the energy range is 0.3-10 keV. The pnCCD detector cooled by a pulse tube cooler enables high-resolution spectroscopy and imaging combined with excellent time resolution. It will also have several working modes with time resolution ranging from tens of microseconds to 50 milliseconds. Currently, the FXT is in its qualification model phase. The mirror assemblies (STM and TCM) as well as the pnCCD EM module have been manufactured and tested.

Accession Number: WOS:000674737700082

Conference Title: Conference on Space Telescopes and Instrumentation - Ultraviolet to Gamma Ray / SPIE Astronomical Telescopes + Instrumentation Conference

Conference Date: DEC 14-18, 2020

Conference Location: ELECTR NETWORK

Conference Sponsors: SPIE

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-3676-7

Record 5 of 86

Title: Design of deployment systems for high-resolution deployable telescope based on CubeSat

Author(s): Dai, HB (Dai Haobin); Li, C (Li Chuang); Li, LL (Li Liangliang); Hu, B (Hu Bin); Yao, P (Yao Pei)

Edited by: Zhu Y; Xue S

Source: AOPC 2021: NOVEL TECHNOLOGIES AND INSTRUMENTS FOR ASTRONOMICAL MULTI-BAND OBSERVATIONS  Book Series: Proceedings of SPIE  Volume: 12069  Article Number: 1206918  DOI: 10.1117/12.2606896  Published: 2021  

Abstract: In this paper, the deployment systems of a deployable space telescope for CubeSat are proposed. This telescope can achieve a ground resolution less than 1 meter at an orbital altitude of 400 km. Both the primary and secondary mirrors of it can be stowed in 3U volume(100mmx100mmx300mm) during launching period. The functions of the deployment systems include the locking of the primary and secondary mirrors when stowed, the deployment on-orbit, and the active adjustment of the primary mirror segments after deployment. In this paper, firstly, the optical system of deployable telescope is described, then the deployment systems of the telescope are designed. Finally, the modal analysis is carried out using finite element method.

Accession Number: WOS:000767136300043

Conference Title: Conference on AOPC - Novel Technologies and Instruments for Astronomical Multi-Band Observations

Conference Date: JUN 20-22, 2021

Conference Location: Beijing, PEOPLES R CHINA

Conference Sponsors: Chinese Soc Opt Engn, Univ Elect Sci & Technol China, Sci & Technol Low Light Level Night Vis Lab, Sci & Technol Electro Opt Informat Secur Control, Tsinghua Univ, Dept Elect Engn, Nano Optoelectron Lab

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-5014-5; 978-1-5106-5013-8

Record 6 of 86

Title: Optical design of a snapshot image mapping spectrometer

Author(s): Ding, XM (Ding, Xiaoming); Yang, QQ (Yang, Qiangqiang); Hu, L (Hu, Liang); Zhou, SB (Zhou, Shubo); Wang, XC (Wang, Xiaocheng); Li, YP (Li, Yupeng)

Edited by: Liu J; Wang Y; Zhao H; Xu L

Source: AOPC 2021: OPTICAL SPECTROSCOPY AND IMAGING  Book Series: Proceedings of SPIE  Volume: 12064  Article Number: 120640D  DOI: 10.1117/12.2606321  Published: 2021  

Abstract: This paper introduces the optical design method of an IMS prototype and proposes an entire optical system optimization approach. The final performance evaluation reveals that the optimized system could meet the requirements. The spectral range of the prototype is designed to be from 450 nm to 700 nm, containing 31 bands. The spectral resolution at the central wavelength is about 8 nm. The field angle (2 omega) is 1.86 deg, and the spatial angle resolution (Delta omega) is designed to be 0.013 deg.

Accession Number: WOS:000766305600012

Conference Title: Conference on AOPC - Optical Spectroscopy and Imaging

Conference Date: JUN 20-22, 2021

Conference Location: Beijing, PEOPLES R CHINA

Conference Sponsors: Univ Elect Sci & Technol China, Sci & Technol Low Light Lvel Night Vis Lab, Sci & Technol Electro Opti Informat Secur Control, Tsinghua Univ, Dept Elect Engn, Nano Optoelectron Lab, Chinese Soc Opt Engn

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-5004-6; 978-1-5106-5003-9

Record 7 of 86

Title: The Visible Telescope onboard the Chinese-French SVOM Satellite

Author(s): Fan, XW (Fan, Xuewu); Zou, GY (Zou, Gangyi); Wei, JY (Wei, Jianyan); Qiu, YL (Qiu, Yulei); Gao, W (Gao, Wei); Wang, W (Wang, Wei); Yang, WG (Yang, Wengang); Zhang, J (Zhang, Jian); Li, C (Li, Chuang); Zhao, H (Zhao, Hui); Dan, LJ (Dan, Lijun); Song, ZX (Song, Zongxi); Feng, LJ (Feng, Liangjie); Ren, GR (Ren, Guorui); Huang, C (Huang, Chao); Yuan, H (Yuan, Hao); Sun, ZH (Sun, Zhonghan); Wang, FT (Wang, Fengtao); Wang, CJ (Wang, Chenjie); Li, W (Li, Wei); Shen, C (Shen, Chao); Qi, N (Qi, Ning); Pan, Y (Pan, Yue)

Edited by: Lystrup M; Perrin MD; Batalha N; Siegler N; Tong EC

Source: SPACE TELESCOPES AND INSTRUMENTATION 2020: OPTICAL, INFRARED, AND MILLIMETER WAVE  Book Series: Proceedings of SPIE  Volume: 11443  Article Number: 114430Q  DOI: 10.1117/12.2561854  Published: 2021  

Abstract: The Space-based multi-band astronomical Variable Objects Monitor (SVOM) project is a dedicated satellite developed at the cooperation of China and France, aim to make prompt multi-band observations of Gamma-Ray Bursts (GRBs), the afterglows and other high-energy transient astronomical events. The Visible Telescope (VT) is one of the four payloads onboard the SVOM. VT is designed to observe the afterglows of GRBs both in the visible and near infrared bands simultaneously. The telescope can reach a limiting magnitude of +22.5Mv and provide the redshift indicators for high-Z (z>4) GRBs. VT is also designed to measure the Relative Performance Errors (RPEs) for the satellite attitude and orbit control system (AOCS), aiming to improve the pointing stability of the platform during observation. VT adopts a Ritchey-Chretien (RC) catadioptric optical configuration with a 440mm aperture and uses the dichroic prism before the focal plane to split the incident light into blue ( visible) and red (near infrared) band. Two Fine Guidance Sensor (FGS) CCDs are mounted beside the main CCD on the blue band focal plane of VT and provide sub-arcsecond pixel resolution. Fiber reinforced plastic (CFRP) composites is selected as the material of VT's main structure to ensure enough stiffness and strength during launch. The electrical video processing circuit is carefully designed to make the readout noise below 6e-/pix (rms) in 100s exposure time. Active and passive thermal control are used together to ensure the optical performance and thermoelectric cooler (TEC) is adopted to control the main CCDs working temperature below -65 degrees C to reduce the noise. This paper provides a comprehensive overview of the scientific requirements and the key instrument design aspects of optics, main structure, electrics, thermal control, performance test and validation results of VT.

Accession Number: WOS:000646193100010

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

Conference Date: DEC 14-22, 2020

Conference Location: ELECTR NETWORK

Conference Sponsors: SPIE

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-3674-3

Record 8 of 86

Title: Design of the Active Cooling Focal Plane Component for the Space Astronomy Telescope

Author(s): Feng, LJ (Feng Liangjie); Wang, CJ (Wang Chenjie); Zou, GY (Zou Gangyi)

Edited by: Li X; Jiang Y; Ma X; Zhu T; Qi B

Source: 10TH INTERNATIONAL SYMPOSIUM ON ADVANCED OPTICAL MANUFACTURING AND TESTING TECHNOLOGIES: INTELLIGENT SENSING TECHNOLOGIES AND APPLICATIONS  Book Series: Proceedings of SPIE  Volume: 12075  Article Number: 1207505  DOI: 10.1117/12.2605265  Published: 2021  

Abstract: The detecting CCD of a space astronomical telescope needs to be cooled to -75 degrees C to suppress the dark current for faint target detecting in the universe, and coplanarly spliced with two fine guidance sensor( FGS) which needs to be cooled to -40 degrees C for the stability as long time observation. Two one stage thermos-electric cooler(TEC) was connected to actively cool the detector to ensure the working temperature and the temperature control accuracy, the Structural of the actively cooling detector assembly and the focal plane component were presented and the power dissipation of the TEC was calculated. In order to ensure the coplanarity of the focal plane component on the working temperature, the finite element method was used to analyze the thermal distribution on the detector surface and the thermal deformation of the supporting structure of the FGS with different materials. The analysis results showed that the lowest cooling temperature of the detecting CCD is -75 degrees C, the temperature control accuracy was better than 1., and the coplanar erro r of the detection CCD and the fine guidance sensors did not exceed 20 mu m. The thermal equilibrium test showed that the lowest cooling temperature was -74.9 degrees C similar to-75.1 degrees C for the detecting CCD, The temperature control accuracy was 0.1 degrees C. The thermal optical test showed that the defocus of the FGS was 4 mu m after focusing, which verified the thermal and structural design performance of the focal plane component.

Accession Number: WOS:000797353800004

Conference Title: 10th International Symposium on Advanced Optical Manufacturing and Testing Technologies - Intelligent Sensing Technologies and Applications

Conference Date: JUN 14-17, 2021

Conference Location: Chengdu, PEOPLES R CHINA

Conference Sponsors: SPIE, Chinese Opt Soc, Chinese Acad Sci, Inst Opt & Elect

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-5026-8; 978-1-5106-5025-1

Record 9 of 86

Title: The Research of Φ 1400mm Sic Mirror For Fabrication, Test and Alignment

Author(s): Feng, LJ (Feng Liangjie); Zou, GY (Zou Gangyi); Cheng, PF (Cheng Pengfei); Renguorui (Renguorui); Wang, W (Wang Wei)

Edited by: Rao CH; Veillet C; Ma X; Fan B; Liu F; Vera MC

Source: 10TH INTERNATIONAL SYMPOSIUM ON ADVANCED OPTICAL MANUFACTURING AND TESTING TECHNOLOGIES: LARGE MIRRORS AND TELESCOPES  Book Series: Proceedings of SPIE  Volume: 12070  Article Number: 120700G  DOI: 10.1117/12.2605024  Published: 2021  

Abstract: A Phi 1400mm silicon carbide(SiC) mirror assembly was designed according to the requirement of the mass and the optical surface distortion. The parameters of the light-weighted open-back primary mirror were optimized by fmite element analysis. Six flexure bipods were designed to support the mirror edge in 12 points evenly. 12 floating anti-gravity supports were used to Minimize the optical surface distortion caused by gravity effect to obtain the real optical surface during polishing. The mirror was precisely assembled with the bipods supports and the Carbon fiber reinforcement plastic (CFRP) chamber. The optical test with interferometer showed that the surface distortion was less than 0.03 lambda(lambda=632nm) RIMS with +/- 5 degrees C temperature variation and 1 g gravity condition, and the mass was 145kg, which coincided with the FEA results.

Accession Number: WOS:000797346600015

Conference Title: 10th International Symposium on Advanced Optical Manufacturing and Testing Technologies - Large Mirrors and Telescopes

Conference Date: JUN 14-17, 2021

Conference Location: Chengdu, PEOPLES R CHINA

Conference Sponsors: SPIE, Chinese Opt Soc, Chinese Acad Sci, Inst Opt & Elect

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-5016-9; 978-1-5106-5015-2

Record 10 of 86

Title: Research on Precision Measurement and Assembly Technology of Fery Prism

Author(s): Fu, XH (Fu Xihong); Li, LB (Li Libo); Ma, NN (Ma Nana); Chou, XQ (Chou Xiaoquan); Kang, SF (Kang Shifa); Li, H (Li Hua)

Edited by: Su J; Chu J; Jiang H; Yu Q

Source: SEVENTH SYMPOSIUM ON NOVEL PHOTOELECTRONIC DETECTION TECHNOLOGY AND APPLICATIONS  Book Series: Proceedings of SPIE  Volume: 11763  Article Number: 1176304  DOI: 10.1117/12.2584980  Published: 2021  

Abstract: From the special structure, processing technology and function of Fery prism in spectral imager, and the structural design features of a certain research spectral imager project, an assembly measurement method based on CMM, PSM and high precision rotating device is proposed, which combines the principles of space measurement, point source collimation and 3D mathematical modeling, the on-line inspection and alignment technology of Fery prism assembly are studied. Firstly, the key parameters of a single curved prism, such as curvature radius of surface, spherical coordinates, deflection angle of optical axis and off-axis are measured by CMM. Secondly, the Fery prism assembly is assembled by CMM, PSM and high precision rotating device. The space coordinates between the components are measured by CMM, and the position of the Spherical Center and the deflection angle are precisely determined by point source microscope. Finally, the actual assembly effect of the Fery Prism Assembly is reappeared through the data processing of the computer software, and the directional offset between the Fery prism assembly and the theoretical model is given, the precision assembly of Fery prism aseembly is completed by azimuth rotation and trimming mat processing. It provides a new technology method for on-line precision assembly of Fery prism module in Spectral Imager, which has strong operability and high measurement precision, and is suitable for precision detection and assembly of Fery prism module of different sizes.

Accession Number: WOS:000671015900003

Conference Title: 7th Symposium on Novel Photoelectronic Detection Technology and Applications

Conference Date: NOV 05-07, 2020

Conference Location: Kunming, PEOPLES R CHINA

Conference Sponsors: Chinese Soc Opt Engn, Sci & Technol Low Light Level Night Vis Lab, Yunnan Univ, Xian Technol Univ

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-4362-8

Record 11 of 86

Title: Three-dimensional Reconstruction Technique Based on Triangular Phase Shift and Complementary Gray Code

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

Edited by: Jiang Y; Lv Q; Liu D; Zhang D; Xue B

Source: AOPC 2021: OPTICAL SENSING AND IMAGING TECHNOLOGY  Book Series: Proceedings of SPIE  Volume: 12065  Article Number: 120652E  DOI: 10.1117/12.2606547  Published: 2021  

Abstract: Structured light 3D reconstruction technology has the advantages of non-contact, low cost and high reliability, and is widely used in industrial parts defect detection, cultural relics 3D digitization and other fields. As the core part of structured light, coding method is the key element to obtain 3D scene information, which directly affects the accuracy of 3D reconstruction. The combination of gray coding and phase shifting is a typical method for 3D shape measurement. However, due to the complexity of sinusoidal fringe calculation, and the fringe pattern boundary cannot be strictly aligned, there is a step change problem, which limits the application of this method in the field of real-time high-speed three-dimensional measurement. In this paper, the phase shift method of triangular wave and gray coding are combined to measure the 3D morphology. The triangular wave function only uses two raster images and the phase information can be obtained by simple intensity ratio calculation. The binary defocus technique can shorten the projection time, but it blurs the edge boundary of gray code and aggravates the step problem of reconstruction of object surface. In order to solve this problem, the complementary gray code whose fringe width is half of the sinusoidal fringe period is used to correct the period deviation. The experimental results show that the proposed method can reduce the number of fringe projection, simplify the calculation steps and shorten the time of data processing, so it is feasible.

Accession Number: WOS:000766305700084

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

Conference Date: JUN 20-22, 2021

Conference Location: Beijing, PEOPLES R CHINA

Conference Sponsors: Univ Elect Sci & Technol China, Sci & Technol Low Light Lvel Night Vis Lab, Sci & Technol Electro Opti Informat Secur Control, Tsinghua Univ, Dept Elect Engn, Nano Optoelectron Lab, Chinese Soc Opt Engn

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-5006-0; 978-1-5106-5005-3

Record 12 of 86

Title: A sequential optimization procedure designed for Lyot coronagraph aiming to realize high contrast direct imaging for exoplanets

Author(s): Ge, R (Ge, Rui); Wang, PF (Wang, Pengfei); Wang, YB (Wang, Yuanbo); Zhao, H (Zhao, Hui); Wei, JX (Wei, Jingxuan); Duan, YQ (Duan, Yongqiang); Fan, XW (Fan, Xuewu)

Edited by: Lystrup M; Perrin MD; Batalha N; Siegler N; Tong EC

Source: SPACE TELESCOPES AND INSTRUMENTATION 2020: OPTICAL, INFRARED, AND MILLIMETER WAVE  Book Series: Proceedings of SPIE  Volume: 11443  Article Number: 114433L  DOI: 10.1117/12.2561263  Published: 2021  

Abstract: Coronagraph is a powerful instrumentation that can be used to realize direct exoplanet imaging. Because the stars are far brighter than the exoplanets, a very high requirement for extinction is raised to obtain a high contrast imaging. By optimizing the transmittance of the entrance pupil and the Lyot stop in Lyot Coronagraph, a sequential optimization procedure is proposed to obtain even higher contrast imaging. In this manuscript, the usually adopted joint optimization in the existing literatures is divided into two steps, which we call the sequential optimization procedure. First, the entrance pupil is optimized for maximum transmission while the contrast constraint is imposed on the focal plane of the lens behind it. Second, the Lyot stop is optimized for maximum transmission with the contrast constraint imposed on the imaging plane. Compared with the joint optimization procedure, the sequential one can provide additional advantages. In terms of performance, under the same conditions, an IWA(Inner working angle) of 1.53 lambda/D can be obtained while the IWA for joint one is 2.01 lambda/D. Moreover, the sequential optimization is much faster. Referring to practical applications, the optimum transmittance of Lyot stop in sequential case becomes binary and therefore easy to fabricate. However sequential optimization reduces the throughput approximately 36.81%, which is a drawback that should be compensated.

Accession Number: WOS:000646193100054

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

Conference Date: DEC 14-22, 2020

Conference Location: ELECTR NETWORK

Conference Sponsors: SPIE

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-3674-3

Record 13 of 86

Title: Advances in G-Stack Diode Laser Using Macro-Channel Water Cooling and High Thermal Conductivity Material Packaging

Author(s): Han, Y (Han, Yang); Sun, LC (Sun, Lichen); Fu, TW (Fu, Tuanwei); Gao, LJ (Gao, Lijun); Zheng, YF (Zheng, Yanfang); Chen, YZ (Chen, Yunzhu); Zhang, XJ (Zhang, Xiaojuan); Yan, MN (Yan, Minna); Zhao, SC (Zhao, Sicheng); Yang, K (Yang, Kai); Gao, L (Gao, Lei); Zah, CG (Zah, Chungen); Liu, XS (Liu, Xingsheng)

Edited by: Zediker MS

Source: HIGH-POWER DIODE LASER TECHNOLOGY XIX  Book Series: Proceedings of SPIE  Volume: 11668  Article Number: 116680W  DOI: 10.1117/12.2582695  Published: 2021  

Abstract: There are strong demands at the market to increase power and reliability for high power diode laser. In parallel to this the requirements for cooler and package for the high power diode laser increase. Superior heat dissipation capability and low thermal resistance are some of the key attributes for the diode laser package design in the near future. The most common method of removing the large amounts of waste heat in a diode laser is using a micro-channel cooler. However, a micro-channel cooler requires water to meet demanding specifications to avoid failures due to corrosion, which increases the overall cost to operate and maintain the laser. We demonstrate advances in a new macro-channel water cooling diode laser which are designed to eliminate the failure mechanisms associated with micro-channel coolers, and enhance the laser heat dissipation and the long-term reliability. For the package adopting the high thermal conductivity material, the maximum output power is 100 W per bar in CW mode. Due to the advantage of compact design, high power, high reliability and fast axis collimation, the new diode laser has the potential to be widely used in many fields, such as pumping solid state laser, hair removal, industry and research.

Accession Number: WOS:000691774400017

Conference Title: Conference on High-Power Diode Laser Technology XIX

Conference Date: MAR 06-11, 2021

Conference Location: ELECTR NETWORK

Conference Sponsors: SPIE

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-4172-3

Record 14 of 86

Title: Real-Time Study of Coexisting States in Laser Cavity Solitons

Author(s): Hanzard, PH (Hanzard, Pierre Henry); Rowley, M (Rowley, Maxwell); Cutrona, A (Cutrona, Antonio); Chu, ST (Chu, Sai T.); Little, BE (Little, Brent E.); Morandotti, R (Morandotti, Roberto); Moss, DJ (Moss, David J.); Wetzel, B (Wetzel, Benjamin); Gongora, JST (Gongora, Juan Sebastian Totero); Peccianti, M (Peccianti, Marco); Pasquazi, A (Pasquazi, Alessia)

Book Group Author(s): IEEE

Source: 2021 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)  Book Series: Conference on Lasers and Electro-Optics  Published: 2021  

Abstract: We experimentally demonstrate the presence of two coexisting states in Laser Cavity Solitons (LCS) Microcombs. By using the Dispersive Fourier Transform technique, we show the simultaneous presence of both LCS and a background modulation. (C) 2021 The Author(s)

Accession Number: WOS:000831479800432

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

Conference Date: MAY 09-14, 2021

Conference Location: ELECTR NETWORK

Conference Sponsors: IEEE

Author Identifiers:

ISSN: 2160-9020

ISBN: 978-1-943580-91-0

Record 15 of 86

Title: Real-Time Study of Coexisting States in Laser Cavity Solitons

Author(s): Hanzard, PH (Hanzard, Pierre Henry); Rowley, M (Rowley, Maxwell); Cutrona, A (Cutrona, Antonio); Chu, ST (Chu, Sai T.); Little, BE (Little, Brent E.); Morandotti, R (Morandotti, Roberto); Moss, DJ (Moss, David J.); Wetzel, B (Wetzel, Benjamin); Gongora, JST (Gongora, Juan Sebastian Totero); Peccianti, M (Peccianti, Marco); Pasquazi, A (Pasquazi, Alessia)

Book Group Author(s): IEEE

Source: 2021 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC)  DOI: 10.1109/CLEO/Europe-EQEC52157.2021.9541692  Published: 2021  

Accession Number: WOS:000728078300128

Conference Title: Conference on Lasers and Electro-Optics Europe / European Quantum Electronics Conference (CLEO/Europe-EQEC)

Conference Date: JUN 21-25, 2021

Conference Location: ELECTR NETWORK

Author Identifiers:

ISBN: 978-1-6654-1876-8

Record 16 of 86

Title: Testing of Annular Hyperboloid Mirror for Cassegrain System

Author(s): Hao, SF (Hao, Sanfeng); Zhang, J (Zhang, Jian); An, F (An, Fei); Yang, JF (Yang, Jianfeng)

Edited by: She JB

Source: FOURTH INTERNATIONAL CONFERENCE ON PHOTONICS AND OPTICAL ENGINEERING  Book Series: Proceedings of SPIE  Volume: 11761  Article Number: 117611Z  DOI: 10.1117/12.2585089  Published: 2021  

Abstract: This paper introduces the testing of annular hyperboloid mirror with 460mm diameter in the Cassegrain system. To improve the testing efficiency and meet the requirements of utilization, the study is carried out from three stages: precision grinding, precision polishing, and optical coating. In the precision grinding stage, the annular Zernike polynomial is used to fit the measured surface combining with the data measured from the coordinate measuring machine, so that it can facilitate the testing of the distribution of the surface shape deviation over the entire surface. During the precision polishing stage, a feasible Offner compensator is designed to achieve the goal of high-precision testing of the hyperboloid surface, with a measurement accuracy of RMS <= 0.02 lambda. Also, 0.5-0.7 mu m and 3-5 mu m dual-band high reflectivity and high uniformity reflective coating is designed for the Cassegrain system requirements, the actual test reflectivity is 96.2%, which can meet the design requirements.

Accession Number: WOS:000667953600070

Conference Title: 4th International Conference on Photonics and Optical Engineering

Conference Date: OCT 15-16, 2020

Conference Location: Xian, PEOPLES R CHINA

Conference Sponsors: CAS, Xian Inst Opt & Precis Mech, State Key Lab Transient Opt & Photon, Xian Technol Univ, Shaanxi Normal Univ, Xian Univ Technol, SPIE, Chinese Opt Soc, Shaanxi Opt Soc, Opt & Photon Soc Singapore, Chinese Opt Soc, High Speed Photog & Photon Comm

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-4358-1

Record 17 of 86

Title: Laser collimation beam expansion design based on the Galileo structure

Author(s): He, X (He Xuan); Bai, JM (Bai Jianming)

Edited by: Jiang Y; Lv Q; Liu D; Zhang D; Xue B

Source: AOPC 2021: OPTICAL SENSING AND IMAGING TECHNOLOGY  Book Series: Proceedings of SPIE  Volume: 12065  Article Number: 1206532  DOI: 10.1117/12.2606813  Published: 2021  

Abstract: Starting from the collimated beam to be solved by the lighting system, based on the Gaussian optical theory, the transfoimation of Gaussian beam through the lens is deduced, the principle of large magnification collimating and expanding beam system is analyzed, and the design of collimating and expanding beam system changing the laser beam diameter and divergence angle is realized. It is verified by simulation, which meets the requirements of the lighting system for parallel light incidence

Accession Number: WOS:000766305700107

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

Conference Date: JUN 20-22, 2021

Conference Location: Beijing, PEOPLES R CHINA

Conference Sponsors: Univ Elect Sci & Technol China, Sci & Technol Low Light Lvel Night Vis Lab, Sci & Technol Electro Opti Informat Secur Control, Tsinghua Univ, Dept Elect Engn, Nano Optoelectron Lab, Chinese Soc Opt Engn

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-5006-0; 978-1-5106-5005-3

Record 18 of 86

Title: Applications and development of micro- or nano-metric multi degree of freedom adjusting displacement scaling mechanisms for primary mirror

Author(s): Hu, B (Hu, Bin); Li, C (Li, Chuang); Zhu, Q (Zhu, Qing); Ye, J (Ye, Jing)

Edited by: She JB

Source: FOURTH INTERNATIONAL CONFERENCE ON PHOTONICS AND OPTICAL ENGINEERING  Book Series: Proceedings of SPIE  Volume: 11761  Article Number: 117610R  DOI: 10.1117/12.2586744  Published: 2021  

Abstract: For large aperture and high-resolution space optical cameras, the focusing requirements caused by different resolution requirements, or the requirements for the segmented primary mirror for deployable telescopes or on-orbit assembly space telescopes, the micro- or nano-metric multi degree of freedom adjusting of the primary mirror or the segment mirror is one of the inevitable development trends of the active optical system. According to the different degrees of freedom involved in the primary mirror adjustment, the micro- or nano-metric multi degree of freedom adjusting displacement scaling mechanisms of the monolithic and segmented primary mirror are studied. The development history and structural characteristics of multi degree of freedom adjusting displacement scaling mechanisms including rigid lever type, gear deceleration type, hydraulic mechanism type and compliant hinge type, as well as their research status and application fields, are introduced. The performance characteristics and applications of various displacement scaling mechanisms are analyzed and compared. Finally, according to the application requirements of space telescopes in the future, the development trend of multi degree of freedom (DOF) adjusting displacement scaling mechanism for segmented primary mirror is proposed.

Accession Number: WOS:000667953600026

Conference Title: 4th International Conference on Photonics and Optical Engineering

Conference Date: OCT 15-16, 2020

Conference Location: Xian, PEOPLES R CHINA

Conference Sponsors: CAS, Xian Inst Opt & Precis Mech, State Key Lab Transient Opt & Photon, Xian Technol Univ, Shaanxi Normal Univ, Xian Univ Technol, SPIE, Chinese Opt Soc, Shaanxi Opt Soc, Opt & Photon Soc Singapore, Chinese Opt Soc, High Speed Photog & Photon Comm

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-4358-1

Record 19 of 86

Title: RF spectrum measurement of the versatile microcavity soliton combs

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

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

Source: OPTOELECTRONIC DEVICES AND INTEGRATION X  Book Series: Proceedings of SPIE  Volume: 11894  Article Number: 118941B  DOI: 10.1117/12.2602760  Published: 2021  

Abstract: Dissipative Kerr solitons generated in microresonators driven by a continuous wave pump laser have promise for widespread applications in spectroscopy and telecommunications. From the perspective of basic physics research, DKSs exhibit rich nonlinear phenomena and serve as a unique platform to study nonlinear physics. In this paper, an optimized all-optical radio frequency (RF) spectrum analyzer, also named frequency domain light intensity spectrum analyzer (f-LISA), is used to characterize the various stable soliton states. Results show that the optimized f-LISA achieves a measurement bandwidth of 2.2 THz and a frame rate of 20.62 MHz. Therefore, the versatile RF spectral patterns of stable two-soliton states have successfully recorded by f-LISA. More importantly, the relative azimuthal angles between two solitons within the round-trip can be extracted by applying an inverse Fourier transform to the RF spectra, indicating that the ultra-fast and broadband RF spectral measurement enable the visualization of soliton motion. It is believed that the f-LISA can function as a powerful and useful tool to monitor the rich nonlinear dynamical phenomena such as soliton number switching in the microresonators.

Accession Number: WOS:000766099800024

Conference Title: Conference on Optoelectronic Devices and Integration X

Conference Date: OCT 10-12, 2021

Conference Location: Nantong, PEOPLES R CHINA

Conference Sponsors: SPIE, Chinese Opt Soc

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-4638-4; 978-1-5106-4637-7

Record 20 of 86

Title: Mapping Diffuse Emission in Lyman UV band

Author(s): Ji, L (Ji, Li); Lou, Z (Lou, Zheng); Zhang, JL (Zhang, Jinlong); Qiu, KQ (Qiu, Keqiang); Li, SY (Li, Shuangying); Sun, W (Sun, Wei); Yan, SP (Yan, Shuping); Zhang, SN (Zhang, Shuinai); Qian, Y (Qian, Yuan); Wang, S (Wang, Sen); Werner, K (Werner, Klaus); Fang, TT (Fang, Taotao); Wang, TG (Wang, Tinggui); Barnstedt, J (Barnstedt, Juergen); Buntrock, S (Buntrock, Sebastian); Cai, MS (Cai, Mingsheng); Chen, W (Chen, Wen); Conti, L (Conti, Lauro); Deng, L (Deng, Lei); Diebold, S (Diebold, Sebastian); Fu, SJ (Fu, Shaojun); Guo, JH (Guo, Jianhua); Hanke, L (Hanke, Lars); Hong, YL (Hong, Yilin); Kalkuhl, C (Kalkuhl, Christoph); Kappelmann, N (Kappelmann, Norbert); Kaufmann, T (Kaufmann, Thomas); Lei, SJ (Lei, Shijun); Li, F (Li, Fu); Li, XF (Li, Xinfeng); Liu, W (Liu, Wei); Meyer, K (Meyer, Kevin); Rauch, T (Rauch, Thomas); Ruan, P (Ruan, Ping); Schaadt, DM (Schaadt, Daniel M.); Schanz, T (Schanz, Thomas); Song, Q (Song, Qian); Stelzer, B (Stelzer, Beate); Wang, ZS (Wang, Zhanshan); Yang, JF (Yang, Jianfeng); Zhang, W (Zhang, Wei)

Edited by: DenHerder JWA; Nikzad S; Nakazawa K

Source: SPACE TELESCOPES AND INSTRUMENTATION 2020: ULTRAVIOLET TO GAMMA RAY  Book Series: Proceedings of SPIE  Volume: 11444  Article Number: 1144407  DOI: 10.1117/12.2561839  Published: 2021  

Abstract: The CAFE (Census of warm-hot intergalactic medium, Accretion, and Feedback Explorer) and LyRIC (Lyman UV Radiation from Interstellar medium and Circum-galactic medium) have been proposed to the space agencies in China respectively. CAFE was first proposed in 2015 as a joint scientific CAS-ESA small space mission. LyRIC was proposed in 2019 as an independent external payload operating on the Chinese Space Station. Both missions are dedicated to mapping the Lyman UV emission (ionized oxygen (O VI) resonance lines at 103.2 and 103.8 nm, and Lyman series) for the diffuse sources in our Galaxy and the circum-galactic mediums of the nearby galaxies. We present the primary science objectives, mission concepts, the enabling technologies, as well as the current status.

Accession Number: WOS:000674737700004

Conference Title: Conference on Space Telescopes and Instrumentation - Ultraviolet to Gamma Ray / SPIE Astronomical Telescopes + Instrumentation Conference

Conference Date: DEC 14-18, 2020

Conference Location: ELECTR NETWORK

Conference Sponsors: SPIE

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-3676-7

Record 21 of 86

Title: SAHS detection using contact-free MZI-BCG sensor

Author(s): Jiang, XN (Jiang, Xinning); Xu, W (Xu, Wei); Yu, CC (Yu, Cheung Chuen); Sun, WY (Sun, Wenye); Dong, B (Dong, Bo); Yu, CY (Yu, Changyuan); Zhao, W (Zhao, Wei); Wang, YS (Wang, Yishan)

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

Source: OPTOELECTRONIC DEVICES AND INTEGRATION X  Book Series: Proceedings of SPIE  Volume: 11894  Article Number: 118941G  DOI: 10.1117/12.2601391  Published: 2021  

Abstract: Real-time SAHS events detection system during sleep is proposed and investigated based on contact-free Mach-Zehnder Interferometer ballistocardiograph (MZI-BCG) senor, which is placed under the mattress. The breath activity influences the optical phase difference of the MZI which is demodulated with 3*3 optical coupler. In this paper, three SAHS events are successfully detected, including OSAS (Obstructive sleep apnea syndrome), CSAS (Central sleep apnea syndrome) and MSAS (Mixed sleep apnea syndrome). The proposed system is simple, cost-effective and non-invasive, which has great potential application in home monitoring.

Accession Number: WOS:000766099800028

Conference Title: Conference on Optoelectronic Devices and Integration X

Conference Date: OCT 10-12, 2021

Conference Location: Nantong, PEOPLES R CHINA

Conference Sponsors: SPIE, Chinese Opt Soc

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-4638-4; 978-1-5106-4637-7

Record 22 of 86

Title: Research on passive ranging technology based on wave front coding

Author(s): Jiao, M (Jiao, Mi); Hui, Z (Hui, Zhao)

Edited by: Jiang Y; Lv Q; Liu D; Zhang D; Xue B

Source: AOPC 2021: OPTICAL SENSING AND IMAGING TECHNOLOGY  Book Series: Proceedings of SPIE  Volume: 12065  Article Number: 120652Y  DOI: 10.1117/12.2606772  Published: 2021  

Abstract: Optical passive ranging is based on the light signal radiated by the object itself. The application of wave front coding technology to passive ranging systems simplifies the system structure and improves the ranging accuracy to a large extent. In this paper, the orthogonal coding passive ranging system with the cosine foul' of the mask function is investigated, and the optical transfer function and the light intensity distribution at the distances of 1m-4m and 1km-5km are simulated by numerical simulation to verify the rationality of the orthogonal coding ranging system, and the measurement error is about. +/- 0.1m.

Accession Number: WOS:000766305700103

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

Conference Date: JUN 20-22, 2021

Conference Location: Beijing, PEOPLES R CHINA

Conference Sponsors: Univ Elect Sci & Technol China, Sci & Technol Low Light Lvel Night Vis Lab, Sci & Technol Electro Opti Informat Secur Control, Tsinghua Univ, Dept Elect Engn, Nano Optoelectron Lab, Chinese Soc Opt Engn

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-5006-0; 978-1-5106-5005-3

Record 23 of 86

Title: Optical design of volume phase holographic grating Raman spectrometer for lunar mineral detection

Author(s): Linghu, BR (Linghu, Birong); Xue, B (Xue, Bin); Zhao, YY (Zhao, Yiyi); Wang, H (Wang, Hui)

Edited by: Liu J; Wang Y; Zhao H; Xu L

Source: AOPC 2021: OPTICAL SPECTROSCOPY AND IMAGING  Book Series: Proceedings of SPIE  Volume: 12064  Article Number: 120640H  DOI: 10.1117/12.2606573  Published: 2021  

Abstract: In order to overcome the problems of low diffraction efficiency, large aberrations and stray light of traditional ruled gratings in reflective Raman spectrometers, combined with the characteristics of the Raman signals of lunar surface minerals, a volume phase holographic (VPH) grating Raman spectrometer system for lunar surface detection was designed. The spectral range of the spectrometer is 140 similar to 3073cm(-1), and the field of view is 3 degrees. According to the Kogelnik coupled wave theory, the diffractive efficiency of the designed VPH grating is more than 95% at the central wavelength, and the average efficiency is more than 80% in the whole spectral range. After optimizing with zemax, the MTF of the entire spectrometer system at the Nyquist frequency is greater than 0.45, and a spectral resolution of 10 cm(-1) can be achieved.

Accession Number: WOS:000766305600016

Conference Title: Conference on AOPC - Optical Spectroscopy and Imaging

Conference Date: JUN 20-22, 2021

Conference Location: Beijing, PEOPLES R CHINA

Conference Sponsors: Univ Elect Sci & Technol China, Sci & Technol Low Light Lvel Night Vis Lab, Sci & Technol Electro Opti Informat Secur Control, Tsinghua Univ, Dept Elect Engn, Nano Optoelectron Lab, Chinese Soc Opt Engn

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-5004-6; 978-1-5106-5003-9

Record 24 of 86

Title: Large field of view 3D detection with a bionic curved compound-eye camera

Author(s): Liu, JH (Liu, Jinheng); Zhang, YJ (Zhang, Yuanjie); Xu, HR (Xu, Huangrong); Yu, WX (Yu, Weixing)

Edited by: Jiang Y; Lv Q; Liu D; Zhang D; Xue B

Source: AOPC 2021: OPTICAL SENSING AND IMAGING TECHNOLOGY  Book Series: Proceedings of SPIE  Volume: 12065  Article Number: 120651H  DOI: 10.1117/12.2605594  Published: 2021  

Abstract: In the bionic curved compound-eye camera (BCCEC) we have invented, the overlapping field of view (FOV) among the ommatidia makes 3D detection possible. In this work, we analyzed the overlapping FOV in BCCEC in detail to prove its potential in 3D detection and designed a new experiment to test its performance. In that the FOVs of multiple ommatidia in BCCEC overlap each other, the FOV of a single ommatidium is used as a representative analysis. The relationship between the overlapping ratio of FOV and the object distance is quantitatively calculated. The results show that more than 95% of the FOV can be 3D reconstructed when the object distance exceeds 32 cm. Next, in order to realize the automatic calibration of all ommatidia, ommatidia are numbered and an addressing algorithm based on the number information of ommatidia is designed, which can be used to determine the adjacent ommatidia of any ommatidium so as to acquire the ommatidia pairs that need to be calibrated. Then, since the aperture of ommatidium is relatively small and it is difficult to accurately align, a new 3D detection experiment is designed. The laser rangefinder is fixed, the black paper is used to block the laser and the formed light spot is used as the detection target. The experimental results show that 3D detection can be performed in the whole FOV of BCCEC. The BCCEC can obtain multi-dimensional information in a large FOV, and it have greater application potential in obstacle avoidance and navigation.

Accession Number: WOS:000766305700051

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

Conference Date: JUN 20-22, 2021

Conference Location: Beijing, PEOPLES R CHINA

Conference Sponsors: Univ Elect Sci & Technol China, Sci & Technol Low Light Lvel Night Vis Lab, Sci & Technol Electro Opti Informat Secur Control, Tsinghua Univ, Dept Elect Engn, Nano Optoelectron Lab, Chinese Soc Opt Engn

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-5006-0; 978-1-5106-5005-3

Record 25 of 86

Title: X-ray communication experiment using photocathode X-ray tube

Author(s): Liu, YA (Liu Yong-an); Xuan, H (Xuan Hao); Sheng, LZ (Sheng Li-zhi); Qiang, PF (Qiang Peng-fei); Su, T (Su Tong); Tian, JS (Tian Jin-shou); Zhao, BS (Zhao Bao-sheng)

Edited by: Su J; Chu J; Jiang H; Yu Q

Source: SEVENTH SYMPOSIUM ON NOVEL PHOTOELECTRONIC DETECTION TECHNOLOGY AND APPLICATIONS  Book Series: Proceedings of SPIE  Volume: 11763  Article Number: 117638U  DOI: 10.1117/12.2587619  Published: 2021  

Abstract: In this paper, a novel X-ray tube, which uses a photocathode as an electron emission source, is first introduced. The X-ray tube with photocathode can use an external light source to control the output of photoelectrons, thereby controlling the characteristics of the emitted X-rays. Compared with the traditional X-ray tube with hot cathode, the X-ray emitted by the photocathode X-ray tube is completely modulated by the external light source. Therefore, X-rays can achieve instant on-off and arbitrary pulse waveform emission, and have extremely high time resolution. The basic characteristics of the photocathode X-ray tube was tested. By using the developed X-ray tube and LED light source, preliminary X-ray communication experiments have been carried out. The results show that the digital signal restoration with a frequency of up to 1MHz can be achieved. Except for X-ray communication, the developed photocathode X-ray tube can also have important applications in many fields such as radiation calibration and scintillator afterglow measurement.

Accession Number: WOS:000671015900316

Conference Title: 7th Symposium on Novel Photoelectronic Detection Technology and Applications

Conference Date: NOV 05-07, 2020

Conference Location: Kunming, PEOPLES R CHINA

Conference Sponsors: Chinese Soc Opt Engn, Sci & Technol Low Light Level Night Vis Lab, Yunnan Univ, Xian Technol Univ

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-4362-8

Record 26 of 86

Title: A visible light photon-counting imaging detector based on induction readout

Author(s): Liu, YA (Liu Yong'an); Liu, YF (Liu Yifan); Wei, YL (Wei Yonglin); Yang, XH (Yang Xianghui); Zhang, RL (Zhang Ruili); Zhao, H (Zhao Hui); Tian, JS (Tian Jinshou); Sheng, LZ (Sheng Lizhi); Zhao, BS (Zhao Baosheng)

Edited by: Yuan XC; Carney PS; Shi K

Source: ADVANCED OPTICAL IMAGING TECHNOLOGIES IV  Book Series: Proceedings of SPIE  Volume: 11896  Article Number: 1189618  DOI: 10.1117/12.2602541  Published: 2021  

Abstract: Photon-counting imaging detectors based on microchannel plate (MCP) and position-sensitive anode are characterized by extremely high sensitivity, as well as the ability to detect single photons. In this study, a visible light photon-counting imaging detector based on induction readout was developed for the detection of weak light intensities, such as photon counting radar and biofluorescence lifetime imaging. The design is based on a 25 mm diameter multi-alkali S20 photocathode followed by a MCP stack, and read out by a high-resistance Ge layer anode. The position-sensitive anode was located at the atmosphere side of the Ge substrate. Such a detector was advantageous in terms of reconfigurability and detachability. The imaging performance of the detector was tested by using the wedge and strip anode to decode the photon event position information. The experimental results showed a detector gain reaching about 3 x 10(6), pulse height resolution (PHR) of about 105%, and spatial resolution better than 100 mu m.

Accession Number: WOS:000792674400012

Conference Title: Conference on Advanced Optical Imaging Technologies IV

Conference Date: OCT 10-11, 2021

Conference Location: Nantong, PEOPLES R CHINA

Conference Sponsors: SPIE, Chinese Opt Soc

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-4642-1; 978-1-5106-4641-4

Record 27 of 86

Title: Precise Temporal Localization for Complete Actions with Quantified Temporal Structure

Author(s): Lu, CK (Lu, Chongkai); Li, RM (Li, Ruimin); Fu, H (Fu, Hong); Fu, B (Fu, Bin); Wang, YH (Wang, Yihao); Lo, WL (Lo, Wai-Lun); Chi, ZR (Chi, Zheru)

Book Group Author(s): IEEE COMP SOC

Source: 2020 25TH INTERNATIONAL CONFERENCE ON PATTERN RECOGNITION (ICPR)  Book Series: International Conference on Pattern Recognition  Pages: 4781-4788  DOI: 10.1109/ICPR48806.2021.9412081  Published: 2021  

Abstract: Existing temporal action detection algorithms cannot distinguish complete and incomplete actions while this property is essential in many applications. To tackle this challenge, we proposed the action progression networks (APN), a novel model that predicts action progression of video frames with continuous numbers. Using the progression sequence of test video, on the top of the APN, a complete action searching algorithm (CAS) was designed to detect complete actions only. With the usage of frame-level fine-grained temporal structure modeling and detecting actions according to their whole temporal context, our framework can locate actions precisely and is good at avoiding incomplete action detection. We evaluated our framework on a new dataset (DFMAD-70) collected by ourselves which contains both complete and incomplete actions. Our framework got good temporal localization results with 95.77% average precision when the IoU threshold is 0.5. On the benchmark THUMOS14, an incomplete-ignostic dataset, our framework still obtain competitive performance. The code is available online at https://github.com/MakeCent/Action-Progression-Network

Accession Number: WOS:000678409204120

Conference Title: 25th International Conference on Pattern Recognition (ICPR)

Conference Date: JAN 10-15, 2021

Conference Location: ELECTR NETWORK

Conference Sponsors: Int Assoc Pattern Recognit, IEEE Comp Soc, Italian Assoc Comp Vis Pattern Recognit & Machine Learning

Author Identifiers:

ISSN: 1051-4651

ISBN: 978-1-7281-8808-9

Record 28 of 86

Title: The Centroid extraction algorithm of sun based on multi-color model

Author(s): Ma, L (Ma, Ling); Qiao, WD (Qiao, Weidong); Wang, H (Wang, Hui)

Edited by: Jiang Y; Lv Q; Liu D; Zhang D; Xue B

Source: AOPC 2021: OPTICAL SENSING AND IMAGING TECHNOLOGY  Book Series: Proceedings of SPIE  Volume: 12065  Article Number: 120652H  DOI: 10.1117/12.2606559  Published: 2021  

Abstract: This paper proposes a method for extracting the solar centroid based on a multi-color model. The method is based on the three-color models (Lab, HIS, RGB) to segment and extract the color features of the image at the same time, coarsely locate the existence area of the sun target, and filter the obtained results through shape features, etc. We should try our best to optimize algorithm, for which can obtain a precise sun image. It is very important to combine circle center fitting with edge extraction to obtain the coordinate of edge point. What's more, we need to select the edge points to form a sample set of edge points. It is helpful to fit the center of the circle by the least square method. The algorithm is improved to find the center of mass of the sun. By subjective judgment and error analysis evaluation of a large number of results, this method is useful as we expecting for the segmentation and extraction of solar targets. But due to the interference of the shooting angle, light, exposure, weather and other factors when the image was taken, which makes the result of target segmentation not ideal. However, it has little effect on the final centroid extraction result.

Accession Number: WOS:000766305700087

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

Conference Date: JUN 20-22, 2021

Conference Location: Beijing, PEOPLES R CHINA

Conference Sponsors: Univ Elect Sci & Technol China, Sci & Technol Low Light Lvel Night Vis Lab, Sci & Technol Electro Opti Informat Secur Control, Tsinghua Univ, Dept Elect Engn, Nano Optoelectron Lab, Chinese Soc Opt Engn

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-5006-0; 978-1-5106-5005-3

Record 29 of 86

Title: Design of hybrid refractive-diffractive star sensor optical system with wide field and small F-number

Author(s): Ma, ZH (Ma Zehua); Wang, H (Wang Hu); Shen, Y (Shen Yang); Xue, YK (Xue Yaoke); Yan, HY (Yan Haoyu)

Edited by: Zhu Y; Xue S

Source: AOPC 2021: NOVEL TECHNOLOGIES AND INSTRUMENTS FOR ASTRONOMICAL MULTI-BAND OBSERVATIONS  Book Series: Proceedings of SPIE  Volume: 12069  Article Number: 120690W  DOI: 10.1117/12.2606601  Published: 2021  

Abstract: In order to improve the measurement accuracy and detection ability of the star sensor, this paper uses a double Gauss structure with conic aspheric surface and hybrid refractive-diffractive to design an optical system with large field of view of 25 degrees and large relative aperture of 1/1.156, and only 6 lenses are used. First, According to the selected CMOS APS sensor performance parameters, the entrance pupil diameter, field of view, focal length and wavelength range are determined. The field of view is 25 degrees, F number is 1.156, focal length is 52mm, entrance pupil diameter is 45mm, the wavelength range is 500-800nm. The detection of 6 magnitude stars is realized, the probability of capturing 5 navigation stars is 100%, and autonomous navigation recognition is realized. Then, the glass material selection and structure optimization of the optical system are conducted, the optical system is optimized by introducing two conic aspheric surfaces and a diffractive surface. Finally, the influence of the diffraction efficiency of the diffractive optical element on the signal-to-noise ratio is analyzed. After analysis of image quality, the shape of diffuse spot in each field of view is approximately circular, the energy is close to Gaussian distribution, more than 90% of the energy is concentrated in 3x3 pixels, lateral color is less than 1.06 mu m, and relative distortion is less than 0.87%. The optical system only uses six lenses, the imaging quality meets the imaging requirements of the star sensor, and is beneficial to improve the accuracy and detection capability of the star sensor.

Accession Number: WOS:000767136300031

Conference Title: Conference on AOPC - Novel Technologies and Instruments for Astronomical Multi-Band Observations

Conference Date: JUN 20-22, 2021

Conference Location: Beijing, PEOPLES R CHINA

Conference Sponsors: Chinese Soc Opt Engn, Univ Elect Sci & Technol China, Sci & Technol Low Light Level Night Vis Lab, Sci & Technol Electro Opt Informat Secur Control, Tsinghua Univ, Dept Elect Engn, Nano Optoelectron Lab

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-5014-5; 978-1-5106-5013-8

Record 30 of 86

Title: Fiber Interferometers for Time-domain Quantum Optics

Author(s): MacLellan, B (MacLellan, Benjamin); Roztocki, P (Roztocki, Piotr); Islam, M (Islam, Mehedi); Reimer, C (Reimer, Christian); Fischer, B (Fischer, Bennet); Sciara, S (Sciara, Stefania); Helsten, R (Helsten, Robin); Jestin, Y (Jestin, Yoann); Cino, A (Cino, Alfonso); Chu, S (Chu, Sai T.); Little, B (Little, Brent); Moss, DJ (Moss, David J.); Kues, M (Kues, Michael); Morandotti, R (Morandotti, Roberto)

Book Group Author(s): IEEE

Source: 2021 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)  Book Series: Conference on Lasers and Electro-Optics  Published: 2021  

Abstract: A novel method for stabilizing fiber interferometers based on frequency- and polarization-multiplexing enables unambiguous phase retrieval, long-term stability, and phase-independent performance. These capabilities allow for precise manipulation of time-bin quantum states in a low-complexity setup. (C) 2021 The Author(s)

Accession Number: WOS:000831479800299

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

Conference Date: MAY 09-14, 2021

Conference Location: ELECTR NETWORK

Conference Sponsors: IEEE

Author Identifiers:

ISSN: 2160-9020

ISBN: 978-1-943580-91-0

Record 31 of 86

Title: Design of 1550nm adjustable laser lighting source

Author(s): Mei, C (Mei Chao); Chang, SS (Chang Sansan); Gao, B (Gao Bo); Yi, B (Yi Bo)

Edited by: Jiang Y; Lv Q; Liu D; Zhang D; Xue B

Source: AOPC 2021: OPTICAL SENSING AND IMAGING TECHNOLOGY  Book Series: Proceedings of SPIE  Volume: 12065  Article Number: 1206546  DOI: 10.1117/12.2599777  Published: 2021  

Abstract: Shortwave laser is more and more widely used in gated imaging, tracking and pointing, communication and other fields. For the requirement of 1550nm high power laser source, The paper analyzes the realization way, and realized the 1550nm high power laser lighting source. We use multichannel semiconductor laser coupling to realize the high-power light source, and uses fiber coupling to realize the uniform spot. On this basis, an extended collimator is designed, which achieves 10 times of high-power The beam divergence angle can reach 9 mrad to 90 mrad, and the RMS value can be less than 1/4 of the wavelength at each magnification of the wave phase difference, which can meet the needs of engineering application.

Accession Number: WOS:000766305700140

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

Conference Date: JUN 20-22, 2021

Conference Location: Beijing, PEOPLES R CHINA

Conference Sponsors: Univ Elect Sci & Technol China, Sci & Technol Low Light Lvel Night Vis Lab, Sci & Technol Electro Opti Informat Secur Control, Tsinghua Univ, Dept Elect Engn, Nano Optoelectron Lab, Chinese Soc Opt Engn

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-5006-0; 978-1-5106-5005-3

Record 32 of 86

Title: Research of Robotic Spherical Polishing End Effector Based on Finite Element Simulation

Author(s): Mu, RX (Mu, Ruixin); Zhang, J (Zhang, Jian)

Edited by: She JB

Source: FOURTH INTERNATIONAL CONFERENCE ON PHOTONICS AND OPTICAL ENGINEERING  Book Series: Proceedings of SPIE  Volume: 11761  Article Number: 117611R  DOI: 10.1117/12.2584956  Published: 2021  

Abstract: In this paper, using Preston hypothesis and CCOS removal model, analyzing removal function of the spherical polishing end is analyzed as Gaussian distribution, four schemes are proposed to design the robot optical spherical polishing end effector. Through the analysis and comparison of advantages and disadvantages, an optimal solution is obtained and a standardized design is carried out to realize the synthesis of revolution and rotation of the spherical polishing wheel. The design of the spherical polishing tool adopts bevel gear transmission, belt transmission and planetary gear structure. When the motor input is 200r/min, by adjusting the specifications of the pulley, the spherical polishing wheel can achieve a revolution speed of 60r/min and a rotation speed of 100 similar to 400r/min. After the design is completed, finite element analysis is performed on the important parts of the structure, and the designed structure meets the strength requirements.

Accession Number: WOS:000667953600062

Conference Title: 4th International Conference on Photonics and Optical Engineering

Conference Date: OCT 15-16, 2020

Conference Location: Xian, PEOPLES R CHINA

Conference Sponsors: CAS, Xian Inst Opt & Precis Mech, State Key Lab Transient Opt & Photon, Xian Technol Univ, Shaanxi Normal Univ, Xian Univ Technol, SPIE, Chinese Opt Soc, Shaanxi Opt Soc, Opt & Photon Soc Singapore, Chinese Opt Soc, High Speed Photog & Photon Comm

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-4358-1

Record 33 of 86

Title: Research on the Properties of HfO₂ Optical Films Prepared with APS Assisted Electron Beam Evaporation Deposition

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

Edited by: Shao Y

Source: PACIFIC RIM LASER DAMAGE 2021: OPTICAL MATERIALS FOR HIGH-POWER LASERS  Book Series: Proceedings of SPIE  Volume: 11912  Article Number: 1191207  DOI: 10.1117/12.2602069  Published: 2021  

Abstract: HfO2 thin films are widely used in laser system because of its superior optical and mechanical properties, especially high laser induced damage threshold. In this paper, single-layer HfO2 thin films were prepared by APS plasma assisted electron beam evaporation deposition. The effects of oxygen charging of electron gun, baking temperature, discharge current of APS source and bias voltage of APS source on optical properties, surface roughness, standing wave electric filed and laser induced damage threshold of HfO2 thin films were studied by orthogonal experiment. Experiment and analysis results showed that the characteristics of HfO2 thin films are closely related to the oxygen charging of electron gun, baking temperature and APS assisted processing parameters. Especially, baking temperature, oxygen charging of electron gun and bias voltage of APS source have great influence on laser induced damage threshold. Through the analysis of experimental date, the optimal combination of process parameters for APS assisted electron beam evaporation of HfO2 optical films were obtained.

Accession Number: WOS:000759292200006

Conference Title: Conference on Pacific Rim Laser Damage - Optical Materials for High-Power Lasers

Conference Date: MAY 23-25, 2021

Conference Location: Hangzhou, PEOPLES R CHINA

Conference Sponsors: SPIE, Shanghai Inst Opt & Fine Mech, Chinese Laser Press, Hangzhou Inst Adv Study

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-4684-1

Record 34 of 86

Title: Figure error of optical elements induced aberrations of optical system

Author(s): Pang, ZH (Pang Zhihai); He, TB (He Tianbin)

Edited by: Pu M; Marsh JH; Fan B; Dai Y; Li X; Luo X

Source: 10TH INTERNATIONAL SYMPOSIUM ON ADVANCED OPTICAL MANUFACTURING AND TESTING TECHNOLOGIES: ADVANCED OPTICAL MANUFACTURING AND METROLOGY TECHNOLOGIES  Book Series: Proceedings of SPIE  Volume: 12071  Article Number: 120710X  DOI: 10.1117/12.2604752  Published: 2021  

Abstract: The optical element's figure error can be express as Fringe Zernike polynomial and vector form, based on the vector wavefront aberration theory, the figure error of optical element induced aberration's characteristic of optical system has been analyses in this paper. The figure error on stop aperture affects all the field angles equally and induced the same type aberration as figure error. If the surface of optical element is not the pupil of optical system, the aberration observed in the focal plane is different from the figure error itself, it will not only induced the same type aberration as figure error but also induced lower order aberration in the optical system, the relationship between aberration and field of view is different and the location zero for the lower order aberration always reside at the center of the field of view.

Accession Number: WOS:000797348200032

Conference Title: 10th International Symposium on Advanced Optical Manufacturing and Testing Technologies - Advanced Optical Manufacturing and Metrology Technologies

Conference Date: JUN 14-17, 2021

Conference Location: Chengdu, PEOPLES R CHINA

Conference Sponsors: SPIE, Chinese Opt Soc, Chinese Acad Sci, Inst Opt & Elect

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-5018-3; 978-1-5106-5017-6

Record 35 of 86

Title: A pupil location algorithm based on cascaded Haar feature and OTSU dynamic threshold segmentation

Author(s): Qian, FX (Qian, Fanxing); Lei, H (Lei, Hao)

Edited by: Jiang Y; Lv Q; Liu D; Zhang D; Xue B

Source: AOPC 2021: OPTICAL SENSING AND IMAGING TECHNOLOGY  Book Series: Proceedings of SPIE  Volume: 12065  Article Number: 120653I  DOI: 10.1117/12.2607002  Published: 2021  

Abstract: With the development of visual human-computer interaction, non-invasive eye-tracking technology has been applied in medical diagnosis, psychological research, augmented reality and other fields. As a key step of video-based eye tracking technology, pupil detection requires strong robustness, real-time performance and high precision. Although many pupil detection algorithms have been developed, pupil detection is still a challenge when there are so many interference factors such as bright light, reflection, eyelid or eyelash occlusion, or low image resolution. Aim to address the above difficult problems of pupil detection, this paper uses cascaded Haar features and Otsu dynamic threshold segmentation to improve the performance of the existing pupil detection algorithm. The performance of the improved algorithm is verified with the public human eye image dataset from Swirski with high off-axis and severe eyelash occlusion. The results show that the accuracy of the improved algorithm is 86.3% and 89.7% in the error range of 5 pixels and 10 pixels, respectively. The detection algorithm in this paper can provide accurate pupil center coordinates for eye tracking, which lays a foundation for the high-precision calibration and measurement of the following eye tracker.

Accession Number: WOS:000766305700123

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

Conference Date: JUN 20-22, 2021

Conference Location: Beijing, PEOPLES R CHINA

Conference Sponsors: Univ Elect Sci & Technol China, Sci & Technol Low Light Lvel Night Vis Lab, Sci & Technol Electro Opti Informat Secur Control, Tsinghua Univ, Dept Elect Engn, Nano Optoelectron Lab, Chinese Soc Opt Engn

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-5006-0; 978-1-5106-5005-3

Record 36 of 86

Title: Genetic Deep Learning for Photonic Device Inverse Design

Author(s): Ren, YM (Ren, Yangming); Zhang, LX (Zhang, Lingxuan); Zhang, WF (Zhang, Wenfu); Sun, XC (Sun, Xiaochen)

Book Group Author(s): IEEE

Source: 2021 ANNUAL CONFERENCE OF THE IEEE PHOTONICS SOCIETY (IPC)  Book Series: IEEE Photonics Conference  DOI: 10.1109/IPC48725.2021.9593021  Published: 2021  

Abstract: We demonstrate an inverse design method by combining deep neural networks and genetic optimization. The method significantly reduces the training data compared with existing methods. The method is adopted to design some ultra-compact photonic devices to show its high computing efficiency and great flexibility.

Accession Number: WOS:000866488100179

Conference Title: Annual Conference of the IEEE-Photonics-Society (IPC)

Conference Date: OCT 18-21, 2021

Conference Location: ELECTR NETWORK

Conference Sponsors: IEEE, IEEE Photon Soc

Author Identifiers:

ISSN: 2374-0140

ISBN: 978-1-6654-1601-6

Record 37 of 86

Title: Design of off-axis compact optical system with large relative aperture and large field of view

Author(s): Ren, ZG (Ren, Zhiguang); Li, XY (Li, Xuyang); Wang, W (Wang, Wei); Yao, R (Yao, Rui); Ma, ZX (Ma, Zixuan); Chu, NQ (Chu, Nanqing)

Edited by: Rao CH; Veillet C; Ma X; Fan B; Liu F; Vera MC

Source: 10TH INTERNATIONAL SYMPOSIUM ON ADVANCED OPTICAL MANUFACTURING AND TESTING TECHNOLOGIES: LARGE MIRRORS AND TELESCOPES  Book Series: Proceedings of SPIE  Volume: 12070  Article Number: 1207005  DOI: 10.1117/12.2604049  Published: 2021  

Abstract: In order to deal with the threat of space debris to space experiment platforms and equipment, three-mirror anastigmatic system, which has the characteristics of light weight, small size and good optical performance, are used for space debris detection and detailed imaging. With the development of freeform surfaces, this article shows a new type of structure which has good optical performance and simple complexity of assembly and adjustment. The first step is to analyze the calculation method of the initial structure parameters of TMA system, and then the secondary mirror adopts the XY polynomial freeform surface. The primary mirror is reused as tertiary mirror, and the design of a new type TMA system is finally completed. Its effective focal length is 400 mm, the field of view (FOV) is 2 degrees x4 degrees, F/# is 5. At the Nyquist frequency 1081p/mm, the MTF value of this system is greater than 0.588. The maximum distortion is less than 0.80%. The results show that the imaging quality of the system meets the design requirements in the effective field of view.

Accession Number: WOS:000797346600004

Conference Title: 10th International Symposium on Advanced Optical Manufacturing and Testing Technologies - Large Mirrors and Telescopes

Conference Date: JUN 14-17, 2021

Conference Location: Chengdu, PEOPLES R CHINA

Conference Sponsors: SPIE, Chinese Opt Soc, Chinese Acad Sci, Inst Opt & Elect

Author Identifiers:

ISSN: 0277-786X

eISSN: 1996-756X

ISBN: 978-1-5106-5016-9; 978-1-5106-5015-2

Record 38 of 86

Title: Emergence of Laser Cavity-Solitons in a Microresonator-Filtered Fiber Laser

Author(s): Rowley, M (Rowley, Maxwell); Hanzard, PH (Hanzard, Pierre Henry); Cutrona, A (Cutrona, Antonio); Chu, ST (Chu, Sai T.); Little, BE (Little, Brent E.); Morandotti, R (Morandotti, Roberto); Moss, DJ (Moss, David J.); Gongora, JST (Gongora, Juan Sebastian Totero); Peccianti, M (Peccianti, Marco); Pasquazi, A (Pasquazi, Alessia)

Book Group Author(s): IEEE

Source: 2021 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)  Book Series: Conference on Lasers and Electro-Optics  Article Number: STu2D.5  Published: 2021  

Abstract: The parameter space, defined by simple global controls, is probed in a microresonator-filtered fiber laser. We identify a distinct region that clearly admits solitons and we investigate the role of slow nonlinearities in their emergence. (c) 2021 The Author(s)

Accession Number: WOS:000831479802178

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

Conference Date: MAY 09-14, 2021

Conference Location: ELECTR NETWORK

Conference Sponsors: IEEE

Author Identifiers:

ISSN: 2160-9020

ISBN: 978-1-943580-91-0

Record 39 of 86

Title: Emergence of Laser Cavity-Solitons in a Micro resonator-Filtered Fiber Laser

Author(s): Rowley, M (Rowley, Maxwell); Hanzard, PH (Hanzard, Pierre Henry); Cutrona, A (Cutrona, Antonio); Chu, ST (Chu, Sai T.); Little, BE (Little, Brent E.); Morandotti, R (Morandotti, Roberto); Moss, DJ (Moss, David J.); Gongora, JST (Gongora, Juan Sebastian Totero); Peccianti, M (Peccianti, Marco); Pasquazi, A (Pasquazi, Alessia)

Book Group Author(s): IEEE

Source: 2021 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC)  DOI: 10.1109/CLEO/Europe-EQEC52157.2021.9542409  Published: 2021  

Accession Number: WOS:000728078300763

Conference Title: Conference on Lasers and Electro-Optics Europe / European Quantum Electronics Conference (CLEO/Europe-EQEC)

Conference Date: JUN 21-25, 2021

Conference Location: ELECTR NETWORK

Author Identifiers:

ISBN: 978-1-6654-1876-8

Record 40 of 86

Title: Analysis of the internal stray radiation in infrared imaging system based on ambient temperature

Author(s): Shen, LM (Shen Lamei); Li, ZG (Li Zhiguo); Liu, K (Liu Kai)

Edited by: Gong H; Shi Z; Lu J

Source: AOPC 2021: INFRARED DEVICE AND INFRARED TECHNOLOGY  Book Series: Proceedings of SPIE  Volume: 12061  Article Number: 120611D  DOI: 10.1117/12.2606696  Published: 2021