基于连续变焦的大口径长焦距的探测成像一体化光学系统设计  

Design of an Integrated Optical System for Detection and Imaging of Large Aperture and Long Focal Length Based on Continuous Zoom

作　　者：魏锦洋 李旭阳[1,2] 谭龙玉 袁灏 任志广[1,2] 赵佳文 姚凯中 WEI Jinyang;LI Xuyang;TAN Longyu;YUAN Hao;REN Zhiguang;ZHAO Jiawen;YAO Kaizhong(Space Optics Technology Lab,Xi′an Institute of Optics and Precision Mechanics of CAS,Xi′an 710119,China;University of Chinese Academy of Sciences,Beijing 100049,China;Shanghai Aerospace Control Technology Research Institute,Shanghai 201109,China)

机构地区：[1]中国科学院西安光学精密机械研究所空间光学技术研究室,西安710119 [2]中国科学院大学,北京100049 [3]上海航天控制技术研究所,上海201109

出　　处：《光子学报》2024年第1期142-154,共13页Acta Photonica Sinica

基　　金：国家重点研发计划(No.2021YFC2202100)。

摘　　要：为实现空间目标的探测与精确识别,设计了一种基于连续变焦结构兼顾大孔径和长焦距的探测成像一体化光学系统,实现了短焦大视场探测,长焦小视场成像的目的。系统采用里奇-克列基昂(RC)结构加校正镜与变焦结构通过光瞳匹配进行结合的方式,使用两片反射镜压缩光路,系统工作于450~850 nm的光谱范围内,焦距为700~3500 mm;探测端焦距为700 mm,F数为2.5,视场角为0.5°×0.5°;成像端焦距为1400~3500 mm,F数为5~12.5,视场角为0.18°×0.18°。该系统具有探测能力强、成像质量佳、系统总长短、变焦凸轮曲线升角小等优点。In space target observation missions,there is a need for highly sensitive target detection and high-quality imaging.However,there is a significant disparity in the field of view between detection and imaging,and currently,two primary solutions are predominantly employed.One approach involves the design of two independent subsystems,while the other method utilizes a shared-aperture dual-channel design to integrate the functions of detection and imaging into a single system.However,designing two independent systems necessitates a substantial amount of space to accommodate these two subsystems,often exceeding the carrying capacity of most existing space optical payloads.On the other hand,adopting the shared-aperture dual-channel system requires additional electronic components and structural elements,with challenges during the assembly and calibration processes.This may potentially lead to uneven energy distribution issues.In order to achieve high sensitivity detection and precise identification of space targets,this paper introduces the design of an optical system based on a continuous zoom structure that balances a large aperture with a long focal length.This system aims to achieve short focal length and wide-field target detection,as well as long focal length and narrow-field target imaging.In terms of the design methodology,the inherent complexity of the system makes it challenging to obtain an ideal structure during the optimization process.Consequently,this system combines the structures of reflective mirrors and corrective lenses with a zoom structure through optical pupil matching.It employs two reflective mirrors to compress the optical path.During the zooming process,both the zooming components and compensating components move together to maintain the position of the image plane.At the intermediate zoom position,image quality is excellent,allowing for continuous target tracking.To address the issue of uneven energy distribution within the system,this optical system utilizes a shared-aperture detection and

关 键 词：光学设计 连续变焦 大孔径 探测系统 成像系统 一体化系统 光瞳匹配 

分 类 号：TN202[电子电信—物理电子学]