一种非接触式红外透镜间距测试方法  

A Kind of Non-contact Infrared Lens Spacing Test Method

作　　者：牛锦川 张凯 赵英龙[1] 都晓寒 王聪[1] 黄阳[1] 王春雨[1] 张超[1] 董欣[1] 伏瑞敏[1] NIU Jinchuan;ZHANG Kai;ZHAO Yinglong;DU Xiaohan;WANG Cong;HUANG Yang;WANG Chunyu;ZHANG Chao;DONG Xin;FU Ruimin(Beijing Institute of Space Mechanics&Electricity,Beijing 100094,China)

机构地区：[1]北京空间机电研究所,北京100094

出　　处：《航天返回与遥感》2022年第2期56-61,共6页Spacecraft Recovery & Remote Sensing

摘　　要：透镜间距是折射式红外光学系统装调需要精密控制的重要参数。由于红外材料不透可见光,可见光谱段镜头装调常用的镜间距高精度测试方法无法直接应用,红外镜头在线装调过程中系统透镜间距的高精度检测成为装调难题。文章提出一种利用镜面定位仪、可见光辅助平板玻璃在线非接触检测红外镜头透镜间距的方法,即利用镜面定位仪通过测试辅助平板玻璃与装调过程中相邻两块红外透镜的空间间隔,结合结构尺寸检测红外透镜间距,其测试精度优于0.002mm。在某航天相机的红外中波镜头实际装调中对该方法进行了验证,装调完成后镜头各视场波前均方根误差小于0.075λ(测试波长λ=3.39μm),优于镜间距采用传统接触法测量的装调结果,该方法合理、可行。During the development of refraction infrared lenses,the lens spacing is an important parameter that requires precise control.Since infrared materials aren’t transparent to visible light,the high-precision test methods of lens spacing commonly used for lens assembly and adjustment in the visible spectrum cannot be directly applied.As a result,the high-precision test of the system lens spacing during the installation and adjustment of the infrared lens becomes a problem.This paper proposes a method using a mirror locator and auxiliary flat glass to detect the distance between the infrared lenses.That is,the mirror locator is used to test the air gap between the auxiliary flat glass and the two adjacent infrared lenses in the process of assembly and adjustment,combined with the structure size,to detect the distance between the infrared lenses,and the test accuracy is better than 0.002mm.The feasibility of this method is verified by combining with a certain type of aerospace infrared mid-wave lens.The wavefront RMS for the lens in each field of view is less than 0.075λ(the test wavelength λ=3.39μm),which is better than the adjustment result measured by the traditional contact methods for the lens spacing measurement.This method is reasonable and feasible.

关 键 词：红外镜头 镜头装调 透镜间距 航天相机 

分 类 号：TN206[电子电信—物理电子学]