离轴卡塞格林光学系统装调技术
Alignment technology of off-axis Cassegrain optical system
刘伟光 1张燕 1肖应玉 1李阳 1张向明 1杜萌 1管伟 1苏瑛 1左晓舟 1史永航1
作者信息
- 1. 西安应用光学研究所,陕西西安 710065
- 折叠
摘要
介绍了一种离轴卡塞格林光学系统的高精度装配和调整方法.针对离轴抛物面主镜装配难点,通过理论计算及仿真分析,确定粘接形式及粘接面积,利用干涉仪及平面镜实现自准直检测,完成了主镜的微应力装配.结合系统结构特点,通过测量主镜最佳面型,将主镜位置姿态与机械基准建立关系,使主镜光轴与机械基准保持一致.通过分析次镜失调量与系统波相差之间的关系,对次镜进行六个自由度的调整实现系统波相差校正.主镜粘接装配后面型变化小于5％,系统装调后波像差优于0.055λ,均满足了设计指标要求.
Abstract
A high-precision alignment method of off-axis Cassegrain optical system was provided.According to the assembly difficulties of off-axis paraboloid primary mirror,the bonding form and area are determined by theoretical calcu-lation and simulation analysis.The self-alignment detection is performed by ainterferometer and a plane mirror to com-plete the micro-stress of assembly of primary mirror.Combined with the structural characteristics of the system,the re-lationship between the primary mirror position attitude and the mechanical reference is established by measuring the opti-mal surface shape of the primary mirror,so that the primary mirror optical axis is consistent with the mechanical refer-ence.By analyzing the relationship between the amount of secondary mirror misalignment and the system wavefront aber-ration,the system wavefront aberration correction is realized by adjusting the secondary mirror by six degrees of free-dom.The surface shape change after the primary mirror is bonded and assembled is less than 5％,and the wave aberra-tion after the system aligned is better than 0.055λ.The data meets the design index requirements.
关键词
离轴光学系统/主镜装调/计算机辅助装调/波相差Key words
off-axis optical system/alignment of main mirror/computer-aided alignment/wave aberration引用本文复制引用
基金项目
国防基础科研计划(JCKY2018208B029)
出版年
2024
NETL
NSTL
万方数据