大气同步校正仪的滤光片筛选方法与精度验证实验研究  

Filtration and Precision Verification of Optical Filters on Atmospheric Synchronous Corrector

作　　者：康晴[1,2] 袁银麟[1] 李健军[1] 杨伟锋[1] 范慧敏[1,2] 钱鸿鹄[1,2] 吴浩宇[1] 郑小兵[1] 

机构地区：[1]中国科学院安徽光学精密机械研究所通用光学定标与表征技术重点实验室,安徽合肥230031 [2]中国科学技术大学,安徽合肥230026

出　　处：《光学学报》2017年第3期219-229,共11页Acta Optica Sinica

基　　金：国家863计划(2013AA7031021;2015AA123702);国家自然科学基金(61275173)

摘　　要：为保证大气同步校正仪的偏振测量精度,在研制的过程中需要对滤光片进行检测和筛选。设计了校正仪的偏振测量模型和滤光片的筛选条件,分析了影响校正仪的偏振度测量精度的主要因素。以490nm通道为例,采用滤光片的光谱透射率和典型目标的光谱辐亮度数据,分析了偏振通道间的相对透射率和带外响应相对于总响应的比值随目标光谱辐亮度形状的变化情况,并对滤光片进行了筛选,对校正仪进行了偏振度测量精度的验证。结果表明,在大气目标偏振度0~0.4范围内、在偏振通道间的相对透射率的相对变化和带外响应的相对变化对偏振度产生的变化均不大于0.4%且二者合成不确定度应小于0.5%的筛选条件下,可保证校正仪的偏振度测量精度。选用最佳效果筛选滤光片的校正仪的测量不确定度明显小于未经筛选滤光片的校正仪的测量不确定度,证明了筛选方法的有效性。In order to guarantee the polarization accuracy of atmospheric synchronous corrector,it is necessary to test and filtrate its filters in the process of corrector development.The polarization measurement model of corrector and the filtration conditions of optical filters are designed,and the main factors which affect the polarization accuracy of corrector are analyzed.Taking the 490 nm channel as an example,using the spectral transmittance of optical filters and the spectral radiance data of typical targets,the relative transmittance between polarized channels and the changes of ratio of out-of-band response to total response with the spectral radiance shape of typical targets are analyzed,and the filtration of optical filters is performed.At last,the polarization measurement precision of the corrector is verified.The results show that the polarization accuracy of the corrector can be guaranteed when the changes of the relative transmittance between polarized channels and the changes of out-of-band response with total response are all not more than 0.4%,and the combined uncertainty is less than 0.5%in the range of atmospheric polarization 0to 0.4.The uncertainty of a corrector with optimal selection filter is obviously smaller than that of a corrector without optimal selection filter,which proves the effectiveness of the filtration method.

关 键 词：测量 偏振 滤光片 带外响应 筛选 精度验证 

分 类 号：O432.1[机械工程—光学工程]