离轴卡塞格林光学系统装调技术  

Alignment technology of off-axis Cassegrain optical system

作　　者：刘伟光[1] 张燕[1] 肖应玉[1] 李阳[1] 张向明[1] 杜萌[1] 管伟 苏瑛[1] 左晓舟[1] 史永航 LIU Weiguang;ZHANG Yan;XIAO Yingyu;LI Yang;ZHANG Xiangming;DU Meng SU Ying;GUAN Wei;ZUO Xiaozhou;SHI Yonghang(Xi'an Institute of Applied Optics,Xi'an 710065,China)

机构地区：[1]西安应用光学研究所,陕西西安710065

出　　处：《光学技术》2024年第1期14-18,共5页Optical Technique

基　　金：国防基础科研计划(JCKY2018208B029)。

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。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 calculation and simulation analysis. The self-alignment detection is performed by ainterferometer and a plane mirror to complete the micro-stress of assembly of primary mirror. Combined with the structural characteristics of the system, the relationship between the primary mirror position attitude and the mechanical reference is established by measuring the optimal surface shape of the primary mirror, so that the primary mirror optical axis is consistent with the mechanical reference. By analyzing the relationship between the amount of secondary mirror misalignment and the system wavefront aberration, the system wavefront aberration correction is realized by adjusting the secondary mirror by six degrees of freedom. The surface shape change after the primary mirror is bonded and assembled is less than 5%, and the wave aberration 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 

分 类 号：TN206[电子电信—物理电子学]