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Large-range piston error detection technology based on dispersed fringe sensor
Wang, Pengfei1,2; Zhao, Hui1; Xie, Xiaopeng1; Zhang, Yating1,2; Li, Chuang1; Fan, Xuewu1
2021
会议名称10th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes 2021
会议录名称10th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes
卷号12070
会议日期2021-06-14
会议地点Chengdu, China
出版者SPIE
产权排序1
摘要

Synthetic aperture is the mainstream structure of current astronomical telescopes. However, after the synthetic aperture telescope is deployed in orbit, there will remain tilt and piston error between adjacent segments, which will sharply deteriorate the imaging quality of the optical system. The traditional piston error detection method based on dispersed fringe sensor has the question that it is difficult to detect the piston error within one wavelength, and the detection accuracy is restricted by the detection range. The method in this paper constructs multiple monochromatic light channels by opening windows in different areas on the dispersed fringe pattern, calculating and obtaining the feature value in each window to form a feature vector. Then, the convolutional neural network is introduced to distinguish the feature vector to detect piston error. Among them, the training set construction method adopted in this paper only needs raw data in one wavelength to construct a training set covering the entire detection range. Through simulation, the method proposed in this paper achieves the detection range of [-208λ, 208λ] (λ=720nm), and regardless of the presence of noise, the root mean square value of the detection error does not exceed 17.7nm (0.027λmin, λmin=660nm). © 2021 SPIE

关键词Astronomical observation dispersed fringe sensor co-phasing synthetic aperture
作者部门空间光学技术研究室
DOI10.1117/12.2604553
收录类别EI
ISBN号9781510650152
语种英语
ISSN号0277786X;1996756X
EI入藏号20220811682283
引用统计
文献类型会议论文
条目标识符http://ir.opt.ac.cn/handle/181661/95730
专题空间光学技术研究室
通讯作者Zhao, Hui
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
Wang, Pengfei,Zhao, Hui,Xie, Xiaopeng,et al. Large-range piston error detection technology based on dispersed fringe sensor[C]:SPIE,2021.
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