基于本征系数的大口径望远镜装调方法  

Alignment Method of a Large Aperture Telescope Based on the Eigen Coefficient

作　　者：梁琼心 黄金龙[1] 潘年[1] 陈科位 Liang Qiongxin;Huang Jinlong;Pan Nian;Chen Kewei(Institute of Optics and Electronics,Chinese Academy of Sciences,Chengdu,Sichuan610209,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院光电技术研究所,四川成都610209 [2]中国科学院大学,北京100049

出　　处：《激光与光电子学进展》2021年第12期333-340,共8页Laser & Optoelectronics Progress

基　　金：中国科学院“西部之光”(YA18K005-2018)。

摘　　要：波前探测是辅助望远镜装调的主要技术手段,针对大口径光学系统内部空间受限的问题,提出一种基于本征模式系数求解失调量的计算机辅助装调方法。相比传统的灵敏度矩阵法,本文方法计算量小,不需要对探测器进行分区处理,简化了波前重构矩阵的构造。通过分析本征模式系数与次镜失调量的关系,建立两者之间的灵敏度矩阵模型,对1m口径同轴三反望远镜进行装调仿真,在次镜偏心为±0.3mm、倾斜为±0.2°的失调范围内,两步迭代实现了像差校正,得到的中心视场波前像差均方根值(RMS)均小于λ/14。该研究对未来大口径光学系统的装调工作有很好的实用价值。Wavefront detection is the main technical means of enhancing telescope alignment.Due to the limited internal space for the large aperture optical system,we propose a computer-aided alignment method based on eigenmode coefficients to solve misalignments in telescopes.Compared with the traditional sensitivity matrix method,in the proposed method,the amount of calculation is small,the detector does not need to be partitioned,and the structure of the wavefront reconstruction matrix is simplified.We analyze the relationship between the eigenmode coefficient and the misalignment of the secondary mirror,and establish a sensitivity matrix model between the two.The alignment of the 1-m aperture on-axis three-mirror telescope was simulated.In the misalignment range of decenter±0.3 mm and the tilt ±0.2° for the secondary mirror,an aberration correction was achieved in two-step iteration,and the root-mean-square of the central field wavefront aberration was less thanλ/14,which has a good practical value for the alignment of large aperture optical systems in the future.

关 键 词：成像系统 同轴三反 像差校正 波前曲率传感器 本征函数 灵敏度矩阵 

分 类 号：TH743[机械工程—光学工程]