星载激光雷达望远镜主镜光机分析与优化  

Optomechanical analysis and optimization of spaceborne lidar telescope primary mirror

作　　者：穆永吉 万渊[1] 刘继桥[1] 侯霞[1] 陈卫标[1] Mu Yongji;Wan Yuan;Liu Jiqiao;Hou Xia;Chen Weibiao(Key Laboratory of Space Laser Communication and Detection Technology,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院上海光学精密机械研究所中国科学院空间激光信息传输与探测技术重点实验室,上海201800 [2]中国科学院大学,北京100049

出　　处：《红外与激光工程》2018年第7期193-199,共7页Infrared and Laser Engineering

基　　金：国家重点研究发展计划(2017YFF0104600);民用航天预研项目(D040103);民用航天激光雷达ACDL

摘　　要：针对研制和集成完的直径为1 m的激光雷达望远镜,介绍了望远镜主镜系统的结构设计,并分析了主镜二级背板安装点匹配失调及主镜挠性支撑脚作用对主镜面形的影响。通过建立主镜系统的有限元模型开展光机分析,并对分析结果进行了处理,使其能够与集成装校时的干涉测量波前图进行直接对比,得出二级背板与光学基板安装点匹配失调是导致主镜形变过大的主要原因。针对此问题对望远镜主镜系统结构进行了改进,通过有限元光机结构分析,预计优化后的结构能够有效地减小匹配失调导致的主镜形变,将使主镜均方根形变量从0.3λ降至0.097λ(λ=632.8 nm),满足激光雷达要求的0.15λ面形要求。Based on the fabricated and assembled lidar telescope, the structure of its primary mirror subsystem was presented. The effects on the primary mirror surface of the mismatch among the assembling points on the second supporting board and the malfunction of the flexible supporting foot on the first board were analyzed. The optomechanical analysis was conducted through establishing the finite element model of the primary mirror, the analyzing results were compared with the measured wave front map during the assembling. According to the analysis, the mismatch of the assembling points on the second baseplate was the main reason to deform the primary mirror surface. The primary mirror subsystem structure was optimized through integrated optomechanical analysis. And the expected root mean square deformation of the primary mirror should be decreased from 0.3λ to 0.087λ, which meets the specification requirement of 0.15λ.

关 键 词：激光雷达 望远镜 光机分析 光机系统结构优化 有限元分析 

分 类 号：O436[机械工程—光学工程]