Ms. Meng Xiang Profile

Meng Xiang

at Xi’an Institute of Optics and Precision Mechanics

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Publications (6)

Proceedings Article | 5 November 2020 Paper

Research on image preprocessing techniques needed for long-distance camera scanning Fourier ptychographic imaging

Jing Wang, Hui Zhao, Mingyang Yang, Zhixin Li, Meng Xiang, Yuming Wang, Xuewu Fan

Proceedings Volume 11567, 115672R (2020) https://doi.org/10.1117/12.2579989

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Proceedings Article | 21 June 2019 Presentation + Paper

Research on influences of atmospheric turbulence on long-distance Fourier ptychographic imaging

Mingyang Yang, Xuewu Fan, Hui Zhao, Chuang Li, Meng Xiang

Proceedings Volume 11062, 110620Q (2019) https://doi.org/10.1117/12.2525716

KEYWORDS: Atmospheric turbulence, Atmospheric propagation, Image restoration, Adaptive optics, Fourier transforms, Imaging systems, Free space, Atmospheric optics, Sensors, Spatial resolution

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Fourier ptychography (FP) has emerged as a powerful tool to improve spatial resolution. In order to apply FP technique to long-distance imaging for example remote sensing, many factors have to be overcome, such as diffraction, noise, turbulence and so on. In this paper, we mainly aims at studying the influence of atmospheric turbulence on FP technique, and using iterative algorithms to restore high-legible image and eliminating the residual errors, so it will meet or reach the diffraction limit of imaging system. The optical imaging systems which work in atmospheric circumstance will face the problem of imaging through atmospheric turbulence, which causing the blurring of image and badly impact the imaging capability of optical systems. We combine the FP with the theory of adaptive optics to achieve the effective recovery of the long-range target, which is subject to the effect of atmospheric turbulence. In this work, we firstly introduce a Fourier Series (FS) atmospheric phase screen generator to simulate the atmospheric-induced wave front phase distortions and represent the wave front phase as a two dimensional periodic function. Both the spatial and temporal correlations between wave-front phase screens separated by time and/or angle are properly modeled. And using the adaptive optics， we complete the correction of the atmospheric turbulence in large distance imaging through the developed algorithm. Then we propose using laser arrays coupled with coherent illumination as an effective method of improving spatial resolution in long distance images. We emulate a laser arrays realized by optical fiber conduction and also show that appropriate phase retrieval based reconstruction algorithm which can be used to effectively recover the lost high resolution details from the multiple low resolution acquired images. Finally we analyze the effects of the atmospheric turbulence on the reconstructed image quality. The results prove that under the influence of atmospheric turbulence at outer scale of 1-m, inner scale of 0.1-m, Fourier ptychographic reconstruction can obtain good image quality for object 200 meters far away. The spatial resolution is increased six-fold.

Proceedings Article | 11 January 2019 Paper

Review on the new technologies to improve the resolution of spatial optical remote sensor

Meng Xiang, Chuang Li, Yiyi Zhao, Bin Hu

Proceedings Volume 10837, 108370C (2019) https://doi.org/10.1117/12.2504941

KEYWORDS: Spatial resolution, Remote sensing, Sensors, Image resolution, Optical resolution, Light emitting diodes, Space telescopes, Diffraction, Light sources, Imaging systems

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Proceedings Article | 11 January 2019 Paper

Research on methods of enlarging field of view of the synthetic aperture lidar

Yiyi Zhao, Bin Xue, Xiaolong Ma, Yinghong He, Xingtao Yan, Juan Lv, Meng Xiang

Proceedings Volume 10837, 108370D (2019) https://doi.org/10.1117/12.2504949

KEYWORDS: Heterodyning, Sensors, Antennas, Detector arrays, Signal detection, Staring arrays, LIDAR, Detection theory, Telescopes, Synthetic aperture radar

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SPIE Journal Paper | 23 July 2018 Open Access

Temperature analysis of Cassegrain optical antenna for space laser communication

Yiyi Zhao, Xiaolong Ma, Bin Xue, Fu Li, Yinghong He, Juan Lv, Xingtao Yan, Jirui Yu, Meng Xiang

OE, Vol. 57, Issue 07, 076103, (July 2018) https://doi.org/10.1117/12.10.1117/1.OE.57.7.076103

KEYWORDS: Mirrors, Optical antennas, Eye, Temperature metrology, Wavefronts, Laser communications, Wavefront aberrations, Optical design, Antennas, Interferometers

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Proceedings Article | 2 September 2014 Paper

Lightweight design of the rectangular mirror using topology optimization

Meng Xiang, Fu Li

Proceedings Volume 9280, 928010 (2014) https://doi.org/10.1117/12.2067871

KEYWORDS: Mirrors, Reflectors, 3D modeling, Optimization (mathematics), Finite element methods, Structural design, Astronomical imaging, Remote sensing, Sensors, Lightweight mirrors

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Showing 5 of 6 publications

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