多谱段多通道离轴三反空间相机装调  

Alignment of Multispectral and Multichannel Off-axis Three-mirror Space Camera

作　　者：邢辉[1,2] 张占东 刘剑峰[1,2] 宋俊儒 金忠瑞[1,2] 刘志远 XING Hui;ZHANG Zhan-dong;LIU Jian-feng;SONG Jun-ru;JIN Zhong-rui;LIU Zhi-yuan(Beijing Institute of Space Mechanics & Electricity, Beijing 100094, China;Key Laboratory for Advanced Optical Remote Sensing Technology of Beijing,Beijing 100094, China)

机构地区：[1]北京空间机电研究所,北京100094 [2]先进光学遥感技术北京市重点实验室,北京100094

出　　处：《红外》2020年第12期1-11,共11页Infrared

摘　　要：针对离轴三反多谱段空间相机光学件自由度多、通道多且装调复杂的难题,进行了光学仿真分析和计算机辅助装调。根据光学设计结果,设计了基于光线追迹的视场光阑,给出了红外通道和可见光通道的波像差,并仿真分析了次镜和三镜的灵敏度矩阵。用可见光干涉仪对全反射式红外通道进行了装调。根据干涉仪得到的Zernike像差系数,结合计算机辅助装调仿真结果,以主镜为基准调整了次镜与三镜的空间位置关系,直至系统波前满足设计要求。红外通道中心视场和边缘视场的波前均方根(Root Mean Square,RMS)装调结果分别为0.15λ(λ=632.8 nm)和0.33λ;可见光通道中心视场和边缘视场的RMS值分别为0.06λ和0.07λ。考虑到加工和装调误差,装调结果与设计结果基本一致。相机在轨图像清晰,成像质量高。The optical simulation analysis and computer-aided alignment are carried out to solve the problems of multidegree of freedom,multichannel and complex alignment of optical components for off-axis three-mirror multispectral space camera.According to the results of the optical design,a field aperture based on ray tracing is designed,the wavefront aberrations of the infrared channel and the visible channel are given,and the sensitivity matrix of the secondary mirror and the third mirror is simulated and analyzed.The total reflection infrared channel is aligned with a visible-light interferometer.According to the Zernike aberration coefficient obtained by the interferometer,combined with the computer-aided alignment simulation results,the spatial position relationship between the secondary mirror and the third mirror is adjusted based on the primary mirror until the wavefront of the system meets the design requirements.The Root Mean Square(RMS)alignment results of the center field-of-view and the edge field-of-view of the infrared channel are 0.15λ(λ=632.8 nm)and 0.33λrespectively;the RMS values of the center field-of-view and the edge field-of-view of the visible channel are 0.06λand 0.07λrespectively.Considering the processing and assembly errors,the alignment results are basically consistent with the design results.The on-orbit image of the camera is clear and the image quality is high.

关 键 词：空间相机 多谱段 多通道 装调 

分 类 号：V447.1[航空宇航科学与技术—飞行器设计]