摘要
针对航空机载平台对长焦距、紧凑型光学系统的需求,研究采用改进型的R-C主次反射镜接球面校正透镜组的结构形式,校正了全视场下的球差、彗差及色差等像差,设计了长焦距、高分辨率的紧凑型折反射式光学系统。系统焦距为1500 mm,全视场角为2°,光学系统结构包络直径不大于φ400 mm,全视场传递函数优于0.56@62.5 lp/mm,成像质量接近衍射极限。为提高装调效率,降低装调难度,设计实现了R-C主次反射镜中心及附近视场的成像质量达到衍射极限。基于光学干涉检测技术与计算机辅助装调理论,建立系统失调量与像差之间映射关系的灵敏度矩阵,分析失调光学系统的像差特性,并在此基础上设计了精确测量波前、反演失调量的精密光学装调方案。整机装调后光学系统全视场波像差RMS优于1/13λ,达到成像质量要求。
According to the requirement of long focal length and compact optical system for airborne platform,a catadioptric system with long focal length and high resolution is designed by using an improved R-C mirrors and a spherical correction lens to correct spherical aberration,coma and chromatic aberration in full field.This system has a focal length of 1500 mm and field of 2°.The envelopment diameter of the optical system is no more thanφ400 mm,the Modulation Transfer Function is better than 0.56@62.5 lp/mm,and the imaging quality is approaching to diffraction limit.In order to improve efficiency and reduce the difficulty of alignment,the imaging quality of the central and adjacent field of the R-C primary and secondary mirror is controlled to diffraction limit.The sensitivity matrix of the mapping relationship between the misalignment and primary aberration is established by means of interferometer detection and computer-aided alignment.The aberration characteristics of the misalignment optical system are analyzed.The optical precise alignment scheme of wavefront accurate measurement and inversion of the misalignment is proposed.After alignment,the RMS value of the whole system is better than 1/13λ,achieving the imaging quality requirements.
作者
陈太喜
伍雁雄
CHEN Taixi;WU Yanxiong(Ji Hua Laboratory,Foshan,Guangdong 528000,China;School of Physics and Optoelectronic Engineering,Foshan University,Foshan,Guangdong 528000,China)
出处
《光子学报》
EI
CAS
CSCD
北大核心
2021年第11期204-214,共11页
Acta Photonica Sinica
基金
国家自然科学基金(No.61771139)
广东省科技计划(No.X190311UZ190)。
关键词
光学设计
折反射
长焦距
航空机载
计算机辅助装调
Optical design
Catadioptric
Long focal length
Airborne
Computer-aided alignment
