基于自由曲面的大视场天基探测光学系统

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英文篇名：Large Field of View Space-Based Optical Detection SystemBased on Freeform Surfaces 作者：倪栋伟 ; 李旭阳 ; 杨明洋 ; 任志广 英文作者：Ni Dongwei;Li Xuyang;Yang Mingyang;Ren Zhiguang;Laboratory of Space Optics,Xi′an Institute of Optics and Precision Mechanics,Chinese Academy of Sciences;University of Chinese Academy of Sciences;School of Physics and Information Technology,Shaanxi Normal University; 关键词：光学设计 ; 探测系统 ; 大视场 ; 自由曲面 ; Zernike多项式 ; XY多项式 ; 离轴三反 英文关键词：optical design;;detection system;;large field of view;;freeform surfaces;;Zernike polynomials;;XY polynomials;;off-axis three-mirror 中文刊名：GXXB 英文刊名：Acta Optica Sinica 机构：中国科学院西安光学精密机械研究所空间光学应用研究室;中国科学院大学;陕西师范大学物理学与信息技术学院; 出版日期：2018-11-10 出版单位：光学学报 年：2018 期：v.38;No.440 基金：国家自然科学基金(61427811) 语种：中文; 页：GXXB201811037 页数：10 CN：11 ISSN：31-1252/O4 分类号：310-319

摘要

设计了一种大视场空间光学探测系统,结合空间目标特性及探测器性能指标计算了系统参数,确定了系统的技术指标,实现了对空间255 km处目标9等星的探测。系统采用离轴三反式光学结构,工作波段为400～900 nm,焦距为64 mm,视场角为30°×30°。系统的主镜和三镜分别采用Zernike多项式和XY多项式自由曲面进行设计,对系统进行光线追迹获取了自由曲面的离散点数据,利用Matlab对获得的离散点进行拟合,得到了主镜和三镜的自由曲面面型。系统的能量集中度高,成像质量良好。
        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°×30°. 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.

引文

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