摘要
提出了一种贯穿光学系统设计全过程的低误差敏感度设计方法,将像质评价函数与误差敏感度评价函数相结合,采用非支配遗传算法筛选出兼具高像质和低误差敏感度的初始结构,并在后续设计过程中同步扩展视场和优化误差敏感度,最终获得满足指标要求的低误差敏感度大视场离轴三反光学系统。以设计一个焦距为100 mm、F数为6.7、视场为40°×4°的大视场离轴三反光学系统为例,验证了低误差敏感度设计方法的有效性与实用性。
Objective Featuring the ability to eliminate all primary aberrations and achieve large apertures,achromaticity,and sound environmental adaptability,off-axis three-mirror anastigmat(TMA)optical systems are increasingly being adopted in space optics.To obtain target images with a larger spatial range and more spatial details,off-axis TMA optical systems are continuously evolving toward a large field of view(FoV)while pursuing high image quality.However,when it comes to the final realizability of these high-performance optical systems,the optimization design solution is only the start,and error sensitivity is a critical factor that determines whether an optical system can yield excellent as-built performance.According to the aberration theory,optical aberrations increase exponentially with the FoV,leading to dramatically increasing error sensitivity as the FoV expands.Therefore,simultaneously achieving high performance,large FoV,and low error sensitivity is of significance for the design and implementation of high-performance imaging in large FoV off-axis TMA optical systems.Methods Based on previous research,we modify the error sensitivity evaluation function with curvature control,and make it more concise.Meanwhile,a low error sensitivity design method that runs through the entire optical system design is proposed.By utilizing the image quality evaluation function and error sensitivity evaluation function,a non-dominated sorting genetic algorithm(NSGA-II)is employed to select the initial structure within the specified parameter ranges.This process aims to select reasonable initial structures that yield both high image quality and low error sensitivity.Subsequently,the initial structure undergoes FoV expansion and error sensitivity optimization based on specific design criteria.By integrating the FoV expansion process with error sensitivity optimization at each step,we can gradually approach the ideal balance of error sensitivity and FoV.Finally,an off-axis TMA optical system with a large FoV and low error sensitiv
作者
任成明
陈琪
孟庆宇
Ren Chengming;Chen Qi;Meng Qingyu(Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,Jilin,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2024年第16期292-301,共10页
Acta Optica Sinica
基金
国家自然科学基金(62375264,62235018)
中国科学院青年创新促进会项目(2019219)。
关键词
光学设计
离轴三反光学系统
误差敏感度
大视场
optical design
off-axis three-mirror anastigmat optical system
error sensitivity
large field of view
