多波段滤光片辐亮度计的系统级定标方法研究  

Research on System Level Calibration Method of Multi-Band Filter Radiometer

作　　者：张艳娜[1] 郑小兵[1] 李健军[1] 张伟[1] 

机构地区：[1]中国科学院通用光学定标与表征技术重点实验室,安徽合肥230031

出　　处：《光学学报》2013年第8期123-129,共7页Acta Optica Sinica

基　　金：国家973计划(2010CB950801);国家自然科学基金(61275173)

摘　　要：为了满足遥感仪器的高精度辐射定标需求,实现"低温绝对辐射计→多波段滤光片辐亮度计→积分球→遥感器"的辐亮度传递链,对多波段滤光片辐亮度计进行了定标方法的研究。利用可调谐激光导入积分球产生的均匀、稳定、无偏的面光源作为定标光源,使用溯源于低温辐射计的标准辐亮度探测器作为传递标准,通过系统级的定标方法对滤光片辐亮度计的753、865、900、1030nm四个工作波段进行了绝对光谱响应度定标,不确定度优于0.58%。与溯源于法国黑体辐射源的太阳辐射计CIMEL CE318进行了比对实验,结果表明,在四个定标波段,滤光片辐亮度计测得的积分球辐亮度与由CE318测得的辐亮度差值分别为-0.216%、-2.564%、-4.248%和2.226%,验证了该系统级定标方法的合理性。To meet the requirement of high-precision radiation calibration for remote sensor and to achieve the radiance transfer chain ＂cryogenic radiometer→ multi-band filter radiometer→ integrating sphere → remote sensor＂, a calibration method of multi-band filter radiometer is developed. In this method, the uniform, stable and unpolarized surface source is acquired from the tunable laser-illuminated integrating sphere, and the standard radiance detector that is traced from the cryogenic absolute radiometer is used as transferring standard, and the absolute spectral radiance responsibility of a multi-band filter radiometer is obtained at 753, 865, 900 and 1030 nm by the system level calibration, and the calibration uncertainty is below 0.58%. The multi-band filter radiometer and the solar radiometer CIMEL CE318 which is traced from blackbody radiation in France are used to measure radiance of integrating sphere respectively, and the results show that the differences of the four calibration bands are -0.216%, -2.564%, -4.248% and 2.226%, which validate the rationality of the calibration method.

关 键 词：遥感 辐亮度 系统级定标 滤光片辐亮度计 积分球 

分 类 号：O432.2[机械工程—光学工程]