Prof. Xuewu Fan Profile

Prof. Xuewu Fan

at XIOPM CAS

SPIE Involvement:

Author

Publications (15)

Proceedings Article | 27 November 2024 Paper

Variable curvature mirror based optical zooming used for space-borne targets monitoring: review and progress

Hui Zhao, Gangyi Zou, Xiaopeng Xie, Liang Xu, Zeyuan Yin, Mingyang Yang, Xuewu Fan

Proceedings Volume 13237, 132370G (2024) https://doi.org/10.1117/12.3037410

KEYWORDS: Mirrors, Design, Zoom lenses, Imaging systems, Telescopes, Deformable mirrors, Optical imaging, Mirror surfaces, Matrices, Deformation

Read Abstract +

At present, the space-borne optical camera installed on satellite platform used for space targets monitoring usually adopts optical system having fixed length and therefore the corresponding field of view cannot be changed either. However, searching for targets of interest needs large field of view but powerful details resolving capability depends on long focal length instead. In order to realize searching within large field of view and high-resolution imaging within small field of view by using one optical system, zooming is an ideal choice. Nowadays, optical zooming is the most popular zooming technique and by introducing zooming group and compensating group at the same time, not only the focal length could be changed but also the focal plane could be stabilized. However, mechanical moving elements based traditional optical zooming has obvious drawbacks, for example relatively low zoom speed, possible disturbance to platform stability and reliability decreasing. Therefore, optical zooming without macroscopic moving elements has been paid much attention and the key lies in the use of variable curvature mirror (VCM). By combining variable curvature mirror and optical leveraging effect, the slight variation of curvature radius of VCM can generate large optical zooming. On the one hand, the fewer the number of VCM used is, the bigger the saggitus variation of each variable curvature mirror will be. On the other hand, large zoom factor needs large saggitus variation but aberrations turn up correspondingly as well. Therefore, how to balance the number of variable curvature mirrors, the reasonable saggitus variation and better aberration compensation within limited volume are the key to system design. In this manuscript, first of all, the current development status of variable curvature mirror based optical zooming are systematically reviewed and our research progress on this technique is also introduced. After that, the design method is described and one typical design example is presented. At the same time the effectiveness of digital restoration in improving the imaging quality is demonstrated as well. Finally, the development tendency of variable curvature mirror based optical zooming is simply discussed.

Proceedings Article | 27 November 2024 Poster + Paper

Method of design and optimization process of variable curvature mirror with variable thickness distribution

Xiaopeng Xie, Gangyi Zou, Liang Xu, Mingyang Yang, Siyu Xia, Chuang Li, Wenhui Fan, Xuewu Fan, Hui Zhao

Proceedings Volume 13237, 1323714 (2024) https://doi.org/10.1117/12.3035424

KEYWORDS: Deformation, Monochromatic aberrations, Zoom lenses, Mirrors, Imaging systems, Design, Spherical lenses, Optical design, Finite element methods, Optics manufacturing

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Proceedings Article | 27 November 2024 Poster + Paper

Study on calibration method of EMCCD readout noise at high gain

Ruobing Li, Hui Zhao, Yue Pan, Mingyang Yang, Baopeng Li, Xuewu Fan

Proceedings Volume 13237, 132371J (2024) https://doi.org/10.1117/12.3036351

KEYWORDS: Electron multiplying charge coupled devices, Calibration, Light sources, Integrating spheres, Cameras, Astronomy, Imaging systems, Astronomical imaging, System integration

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Proceedings Article | 27 November 2024 Poster + Paper

Using multi-wavelength phase diversity to improve the detection range of piston in multi-aperture

Yating Zhang, Hui Zhao, Mingyang Yang, Pengfei Wang, Baopeng Li, Xuewu Fan

Proceedings Volume 13237, 132371B (2024) https://doi.org/10.1117/12.3035908

KEYWORDS: Point spread functions, Optical transfer functions, Phase shifts, Optical path differences, Imaging systems, Wavefront errors, Zernike polynomials, Wavefront aberrations, Image restoration, Image processing

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Proceedings Article | 23 November 2024 Paper

An algorithm for enhancing low-light remote-sensing images based on zero-reference deep curve estimation (Zero-DCE)

Hong Dai, Bo Zhang, Hui Zhao, Yinqiang Su, Ximing Zhang, Baopeng Li, Mingyang Yang, Xuewu Fan

Proceedings Volume 13239, 132390A (2024) https://doi.org/10.1117/12.3036367

KEYWORDS: Remote sensing, Image enhancement, Image quality, Image processing

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Proceedings Article | 23 November 2024 Paper

Super-resolution reconstruction for low-light imaging using intensified CMOS camera: SNR analysis and algorithm improvement

Hui Zhao, Bo Zhang, Hong Dai, Xuewu Fan, Chao Gao, Ge Zhang, Yinqiang Su, Zhe Bai, Baopeng Li, Mingyang Yang

Proceedings Volume 13239, 132391M (2024) https://doi.org/10.1117/12.3037336

KEYWORDS: Signal to noise ratio, Reconstruction algorithms, Super resolution, Image restoration, Modulation transfer functions, Cameras, Image enhancement, Microchannel plates, CMOS cameras, Image resolution

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Proceedings Article | 23 November 2024 Paper

High-resolution rotating pupil optical imaging for satellite remote sensing

Jiahao Zhang, Hui Zhao, Mingyang Yang, Xuewu Fan

Proceedings Volume 13239, 132390K (2024) https://doi.org/10.1117/12.3036296

KEYWORDS: Imaging systems, Image restoration, Reconstruction algorithms, Optical imaging, Image resolution, Image quality, Super resolution, Remote sensing, Image processing, Point spread functions

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Proceedings Article | 23 November 2024 Paper

An improved RL-IBD restoration algorithm for wavefront coded imaging system

Yukun Xue, Hui Zhao, Mingyang Yang, Baopeng Li, Xuewu Fan

Proceedings Volume 13239, 132390E (2024) https://doi.org/10.1117/12.3036038

KEYWORDS: Monochromatic aberrations, Point spread functions, Imaging systems, Detection and tracking algorithms, Evolutionary algorithms, Image restoration, Image processing, Digital image processing, Wavefront aberrations

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Proceedings Article | 18 December 2023 Paper

Design of a co-aperture composite imaging system for visible light remote sensing camera and synthetic aperture radar

Zhao Wei, Yue Pan, Xuewu Fan

Proceedings Volume 12965, 129650A (2023) https://doi.org/10.1117/12.3007773

KEYWORDS: Imaging systems, Remote sensing, Synthetic aperture radar, Mirrors, Design and modelling, Satellites, Cameras, Modulation transfer functions

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Proceedings Article | 28 November 2023 Poster + Paper

Depth of focus extension of space-borne optical camera through variable curvature mirror

Hui Zhao, Xiaopeng Xie, Mingyang Yang, Gangyi Zou, Yating Zhang, Xuewu Fan

Proceedings Volume 12765, 127651H (2023) https://doi.org/10.1117/12.2687237

KEYWORDS: Cameras, Space mirrors, Mirrors, Switching, Optical transfer functions, Optical sensing, Mirror surfaces, Digital imaging

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Proceedings Article | 27 November 2023 Poster + Paper

Research on sub-pixel shift-based super-resolution imaging by introducing wave-front coding technique

Hui Zhao, Yukun Xue, Mingyang Yang, Baopeng Li, Xuewu Fan

Proceedings Volume 12767, 127671D (2023) https://doi.org/10.1117/12.2687372

KEYWORDS: Point spread functions, Super resolution, Reconstruction algorithms, Imaging systems, Image restoration, Image resolution, Wavefront reconstruction, Aliasing, Spherical lenses, Wavefronts

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Proceedings Article | 27 November 2023 Poster + Paper

A fast non-local means algorithm for phase diversity technique to reconstruct high-resolution multi-aperture images

Yating Zhang, Hui Zhao, Mingyang Yang, Xiaopeng Xie, Pengfei Wang, Baopeng Li, Xuewu Fan, Chuang Li

Proceedings Volume 12766, 127660W (2023) https://doi.org/10.1117/12.2686674

KEYWORDS: Image restoration, Reconstruction algorithms, Optical transfer functions, Point spread functions, Numerical simulations, Imaging systems, Image processing, Telescopes

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Proceedings Article | 16 June 2023 Paper

Structural optimization design and analysis of a 2-m space-based mirror

Sheng Wang, Wei Wang, Bin Hu, DeJing Wei, ShangMin Lin, PengFei Cheng, GuoRui Ren, XueWu Fan

Proceedings Volume 12639, 126390N (2023) https://doi.org/10.1117/12.2682098

KEYWORDS: Mirrors, Design and modelling, Lightweight mirrors, Mirror surfaces, Deformable mirrors, Space mirrors, Deformation, Silicon carbide, Mathematical optimization, Lightning

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Proceedings Article | 9 January 2023 Paper

Research on nonlinear relationship between rotation speed and material removal in wheel polishing technology

Yongsheng Yao, QiXin Li, Xiangmin Jiang, Jiaoteng Ding, Zhen Ma, Xuewu Fan

Proceedings Volume 12507, 125072E (2023) https://doi.org/10.1117/12.2656447

KEYWORDS: Polishing, Optical components, Aspheric lenses, Optics manufacturing, Surface finishing

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Proceedings Article | 4 January 2023 Poster + Paper

Super-resolution reconstruction for extremely low-light imaging by using intensified CCD or CMOS camera

Hui Zhao, Xuewu Fan, Mingyang Yang, Yue Pan, Baopeng Li, Minrui Zhang

Proceedings Volume 12317, 123170L (2023) https://doi.org/10.1117/12.2641587

KEYWORDS: Reconstruction algorithms, Super resolution, Image resolution, Signal to noise ratio, Linear filtering, Image fusion, Cameras, Microchannel plates, CCD cameras, Spatial resolution

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Showing 5 of 15 publications

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