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.
出处
《应用光学》
CAS
CSCD
北大核心
2015年第4期559-565,共7页
Journal of Applied Optics
关键词
光谱反射率
原位测量
反射镜
真空
低温
spectrum reflectivity
in-situ measurement
mirror
vacuum
cryogenics
