多角度偏振辐射计星上积分球结构设计及检测

发布时间：2018-05-14 10:26

本文选题：多角度偏振辐射计 + 积分球　；参考：《光学精密工程》2012年11期

【摘要】：为满足星载多角度偏振辐射计六孔径同时定标及全光路定标的要求,根据多角度偏振辐射计的光路特点和结构约束设计了六出孔椭球形积分球定标源,并对积分球辐射输出的一致性均匀性及偏振特性进行了检测。其中,一致性的检测采用定标后的光谱辐射计直接测量;均匀性的检测考虑积分球出口小,采用了透镜加光阑扫描的方法;偏振度的检测使用了根据马吕斯消光定律设计的线偏振检测仪。实验和检测结果表明,采用的检测和数据处理方法提高了系统的信噪比和测量的准确性。积分球成对开孔输出一致性优于99.5%,面均匀性优于99%,偏振度低于1%,这些结果满足多角度偏振辐射计的辐射定标需求。
[Abstract]:In order to meet the requirements of simultaneous calibration of six apertures and all optical path calibration of spaceborne multi-angle polarization radiometers, a six-hole ellipsoid integral sphere calibration source is designed according to the optical path characteristics and structural constraints of multi-angle polarization radiometers. And the consistency of the radiation output of the integral sphere? The uniformity and polarization characteristics were tested. Among them, the calibration spectral radiometer is used to detect the consistency, the uniformity measurement takes into account the small outlet of the integral sphere, and the method of lens and aperture scanning is used. The linear polarization detector designed according to Marius' law of extinction is used to detect the degree of polarization. The experimental results show that the signal-to-noise ratio (SNR) and the accuracy of the measurement are improved by using the detection and data processing methods. The output consistency of the integral sphere in pairs is better than 99.5, the surface uniformity is better than 99%, and the degree of polarization is less than 1. These results meet the radiation calibration requirements of multi-angle polarization radiometers.
【作者单位】：中国科学院安徽光学精密机械研究所光学遥感中心;
【基金】：国家自然科学基金资助项目(No.40971196)
【分类号】：P111.4

【共引文献】