Large Field of View Space-Based Optical Detection System Based on Freeform Surfaces

被引：5
作者：
Ni Dongwei [1 ,2 ]
Li Xuyang [1 ]
Yang Mingyang [1 ,2 ]
Ren Zhiguang [3 ]
机构：
[1] Chinese Acad Sci, Lab Space Opt, Xian Inst Opt & Precis Mech, Xian 710119, Shaanxi, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] Shaanxi Normal Univ, Sch Phys & Informat Technol, Xian 710119, Shaanxi, Peoples R China
来源：
ACTA OPTICA SINICA | 2018年 / 38卷 / 11期
关键词：
optical design; detection system; large field of view; freeform surfaces; Zernike polynomials; XY polynomials; off-axis three-mirror;
D O I：
10.3788/AOS201838.1122003
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A spatial optical detection system with a large field of view is designed. The parameters of this system are calculated by combining the spatial target characteristics and the performance indexes of the detector. Thus, the technical indexes of this system are determined, and the detection of the ninth-magnitude star target 255 km away in space is realized. This system adopts an off-axis three-mirror optical structure with a spectral range of 400-900 nm, a focal length of 64 mm, and a field of view of 30 degrees X 30 degrees. The primary and tertiary mirrors in this system are designed based on the Zernike and XY polynomial freeform surfaces. The ray tracing is performed and the discrete point data are obtained. These data are fitted by MATLAB to obtain the profiles of the freeform surfaces of these mirrors. This system has a high energy concentration and a good imaging quality.
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页数：10
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