一种改进的易于加工、装调的离轴三反光学系统设计  

Optical Design for a Kind of Simply Processed and Installed Off-Axis Three-Reflection

作　　者：高铎瑞 胡辉[1] 汪伟[1] 谢小平[1] 韩彪[1] 苏玉龙[1] 付强[2] 

机构地区：[1]中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室,陕西西安710119 [2]长春理工大学空地激光通信技术国防重点学科实验室,吉林长春130022

出　　处：《中国激光》2015年第6期313-318,共6页Chinese Journal of Lasers

基　　金：国家自然科学基金(60677009)

摘　　要：为了降低离轴三反光学系统加工和装调难度,提出了一种无遮拦的两反射镜三反射光学系统。将传统的离轴三反射光学系统中的主镜和三镜改进为一块非球面反射镜,即用一块镜面实现两镜的设计,这既能够降低光学加工的复杂度,同时也减少了装调的难度。根据三反射系统像差设计理论,推导出同轴两反射镜三反射系统的初始结构参数计算公式,得出了适用于该系统的求解方程组。设计了焦距1000 mm,F数为10,全视场2°×0.4°,无中心遮拦的离轴两镜三反射系统,两反射镜面型均为二次曲面。从调制传递函数、点列图、衍射能量分布图可以看出,系统成像质量好,能量比较集中。整体系统体积小、结构简单,重量轻。An unobscured reflective optical system with two-mirrors three-reflective is described to reduce off-axis difficulty processing. A piece of aspherical mirrors instead of the primary mirror and third mirror in the traditional off-axis three-reflective system, that is one mirror achieve two mirrors＇ responsibility, the complexity of the optical processing is reduced, as well as the difficulty of the alignment. Based on the aberration theory of three reflective system, formula of the coaxial structural is deduced, the equation for the system is obtained as well. The parameters of the unobscured off-axial two-mirrors system are that focal length of 1000 mm, F number is 10, field of view is 2°× 0.4° , and the surface type of the two mirrors are all quadric surface. From the figure of spot digram, modulation transfer function, point spread function and encircled energy, it is observed that image quality is good and energy is more concentrated. The optical system is designed with small volume, simple structure, and light weight.

关 键 词：光学设计 三反系统 离轴 二次非球面 

分 类 号：TH703[机械工程—仪器科学与技术]