可见光粗跟踪成像镜头光机结构设计  

Opto-mechanical structure design of visible light rough tracking and imaging lens

作　　者：王槐[1] 代霜[1] 范磊[1] 赵勇志[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,长春130033

出　　处：《仪器仪表学报》2017年第5期1190-1197,共8页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(11403023)项目资助

摘　　要：为某在研地基光学望远镜设备设计了300 mm口径的可见光粗跟踪成像镜头的光机结构。采用弯月形结构优化使主镜重量减少了41.2%。针对传统胶粘接固定结构的不足提出了采用弹性压紧方式的主镜支撑结构,采用Patran有限元仿真软件对不同倾角、不同温度状态下,带支撑的主镜面形精度进行了分析;制定了装调方案,室内采用Zygo干涉仪检测带支撑的主镜面形精度检测结果为0.04λ(RMS),可见光波长λ的设计参考值为0.633μm,长焦端和短焦端的系统波像差均为0.132λ(RMS);室内采用平行光管进行星点检验、分辨率检验和外场对北极星成像试验结果显示,系统成像质量满足设备要求;验证了主镜支撑结构和镜头光机结构设计的合理性,为研制同类型镜头的光机结构提供了设计依据和技术途径。The opto-mechanical structue of 300ram aperture visible light rough tracking and imaging lens was designed for a certain developing ground base optical telescope. The concave mirror structure contouring the rear surface was optimized and the primary mirror weight was reduced by 41.2%. Aiming at the deficiencies of the conventional cementing structure, the new primary mirror supporting structure with elastic compression was adopted. The Patran finite element method （FEM） simulation software was adopted to analyze the accuracy of the primary mirror surface figure with supporting structure at different tilt angle positions and different temperatures. The installation and test scheme was designed, Zygo interferometer was used to test the accuracy of the primary mirror surface figure with supporting structure indoor; and the test result of the surface figure is 0.04λ （ RMS）, the design reference value of the visible light wave length λ is 0. 633 nm and the wavefront aberrations of the optical system both for long-focus lens and short-focus lens are 0. 132λ （RMS）. The test results of the indoor collimator star test, resolution test and outdoor polaris imaging test indicate that the system imaging quality meets the telescope requirement. The results verify the reasonability of the new primary mirror supporting structure and lens opto-mechanical structure design, which provides the design basis and technical path for developing the opto-mechanical structure of similar lenses.

关 键 词：可见光镜头 成像 主镜支撑 光机结构 

分 类 号：TH753.3[机械工程—仪器科学与技术] TH761.7[机械工程—精密仪器及机械]