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Research on influences of atmospheric turbulence on long-distance Fourier ptychographic imaging
Yang, Mingyang1,2; Fan, Xuewu1; Zhao, Hui1; Li, Chuang1; Xiang, Meng1,2
2019
会议名称Digital Optical Technologies 2019
会议录名称Digital Optical Technologies 2019
卷号11062
会议日期2019-06-24
会议地点Munich, Germany
出版者SPIE
产权排序1
摘要

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. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

关键词Fourier ptychography long-distance imaging atmospheric turbulence
作者部门空间光学技术研究室
DOI10.1117/12.2525716
收录类别EI ; CPCI
ISBN号9781510628038
语种英语
ISSN号0277786X;1996756X
WOS记录号WOS:000502141600014
EI入藏号20194407611670
引用统计
文献类型会议论文
条目标识符http://ir.opt.ac.cn/handle/181661/31923
专题空间光学技术研究室
作者单位1.Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China;
2.University of Chinese Academy of Sciences, Beijing; 100049, China
推荐引用方式
GB/T 7714
Yang, Mingyang,Fan, Xuewu,Zhao, Hui,et al. Research on influences of atmospheric turbulence on long-distance Fourier ptychographic imaging[C]:SPIE,2019.
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