红外技术, 2015, 37 (5): 374, 网络出版: 2015-06-11
红外离轴系统金属反射镜设计与分析
Design and Analysis of Metal Mirror for Infrared Off-axial System
离轴反射系统 金属镜 柔性结构 Kinematic定位 有限元方法 off-axis system metal mirror flexure mount Kinematic principle FEM
摘要
随着单刃金刚石数控车削技术的不断提高,越来越多的红外系统选用金属作为反射镜材料以提高系统的性价比.同共轴光学系统相比,离轴光学系统的反射镜结构和装调更为复杂,为了深入研究金属反射镜在红外离轴系统中的应用,提出了一种集Kinematic 定位和柔性去应力相结合的轻量化金属反射镜结构.首先从金属结构件的加工特点出发,分析了金属反射镜的轻量化形式和安装结构;接着针对某离轴反射系统中口径最大的离轴主镜,按照各设计要素建立了金属反射镜结构模型;最后采用有限元仿真分析方法,在各种工况下,对该主反射镜进行了详细的分析,结果均满足光学设计要求.
Abstract
With the development of numerical control SPDT(single-point diamond turning),more and more metal mirrors were applied to IR system for reducing the cost.Compared to coaxial system,the mirror mounting structure in IR off-axis system was more complex.As a new and effective option,a light-weight metal mirror with kinematic-locating and flexure-mounting structure was provided.Firstly,with the manufacture characters of metal parts taken into account,kinds of light-weight structures and mounting forms for metal mirror were introduced.Secondly,the model of a metal mirror with aperture of 316 mm for an IR off-axis system was provided.Thirdly,the metal mirror was analyzed in different load cases by FEM and the results satisfied the optical requirements.
范磊, 赵勇志, 曹玉岩. 红外离轴系统金属反射镜设计与分析[J]. 红外技术, 2015, 37(5): 374. FAN Lei, ZHAO Yong-zhi, CAO Yu-yan. Design and Analysis of Metal Mirror for Infrared Off-axial System[J]. Infrared Technology, 2015, 37(5): 374.