空间相机调焦机构同步性精度分析  

Synchronous accuracy analysis of focusing mechanism in space camera

作　　者：高洋 王书新[1] 齐光[1] 孙斌[1] 伞兵[1] 李景林[1] GAO Yang;WANG Shuxin;QI Guang;SUN Bin;SAN Bing;LI Jinglin(Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China)

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033

出　　处：《光学技术》2022年第5期562-565,共4页Optical Technique

基　　金：国家863高技术研究发展计划资助项目(86325113B)。

摘　　要：调焦机构是空间相机获得良好成像质量的重要保障。由于调焦机构焦平面两端的同步性误差不可避免,会对成像质量造成影响,因此对双凸轮和丝杠螺母调焦机构同步性误差进行了分析。介绍了两种调焦机构工作原理;分析了两种调焦机构同步性误差的来源并对其同步性误差进行了计算;对两种调焦机构的同步性进行了测试验证。两种调焦机构采用统计法和蒙特卡罗法计算同步性误差,验证结果与之相符。满足调焦机构同步性误差的最大允许值±20μm,完全满足现阶段使用要求。The focusing mechanism is an important guarantee to acquire remote sensing images for space camera. Synchronous accuracy on both ends of the focal plane is difficult to be eliminated, and it will affect sensing images. So synchronous accuracy analysis of double cam focusing mechanism and screw female focusing mechanism is important. First, it introduces working principle of two types of focusing mechanism, and then analyzes the sources of the synchronous error on both ends of the focal plane of two types of focusing mechanism, in the end, the synchronous accuracy of two types of focusing mechanism is tested. The calculation results show that the error of synchronous motion on both ends of the focal plane of two types by Statistical Method and Monte Carlo Method. Test results accord with the results of calculation. And the maximum error of synchronism is 20μm, the focusing mechanism of two types meets the requirements of practical application quite well.

关 键 词：空间相机 调焦机构 同步性误差 统计法 蒙特卡罗法 

分 类 号：TP394.1[自动化与计算机技术—计算机应用技术] TH691.9[自动化与计算机技术—计算机科学与技术]