真空低温环境反射镜光谱反射率原位测量技术  

Technique of mirror spectrum reflectivity measurement in situ under simulated space environment

作　　者：杨林华[1] 许杰[1] 蒋山平[1] 

机构地区：[1]北京卫星环境工程研究所,北京100094

出　　处：《应用光学》2015年第4期559-565,共7页Journal of Applied Optics

摘　　要：为了研究真空低温环境下定标光学系统光谱反射率测量技术,搭建了小型离轴抛物面反射镜的光谱反射率原位测量试验系统。系统由太阳模拟器、准直镜、折叠镜、离轴抛物面反射镜、光谱仪、数采系统等组成。分别在常温常压和真空低温环境下进行测量,得到350nm^950nm谱段光谱反射率及变化规律,常温常压、真空低温、恢复常温常压下系统测量平均值分别为0.882、0.863和0.883,测量重复性±1.1%,不确定度优于2.4%。结果表明,反射镜光谱反射率在真空低温环境下有较明显的下降,环境恢复后,反射率随之恢复。In order to study the technique for spectrum reflectivity measurement of calibrated optic system in vacuum and low-temperature environment,a small test system which was applied to measure the spectrum reflectivity of the off-axis parabolic mirror in situ was built.The system consists of solar simulator,collimating lens,folding mirror,off-axis parabolic mirror,spectrometer and control system.The measurement was carried out in atmospheric environment and simulated space environment,respectively.The measured spectrum was from 350 nm to 950 nm.The average spectrum reflectivity of the mirror was 0.882 in atmospheric environment,it was 0.863 in simulated space environment.When the mirror went back in the atmospheric environment,the average spectrum reflectivity of the mirror was 0.883.In the test,the measurement repeatability was±1.1%,the uncertainty was less than 2.4%.The test results show that the spectrum reflectivity of the off-axis parabolic mirror decreases in simulated space environment,and increases when the environment is back to the atmospheric environment.

关 键 词：光谱反射率 原位测量 反射镜 真空 低温 

分 类 号：TH74[机械工程—光学工程]