日光诱导叶绿素荧光超光谱探测仪杂散光测试与校正技术  

Stray Light Measurement and Correction Technology of the Solar-Induced Chlorophyll Fluorescence Imaging

作　　者：郭永祥[1] 柯君玉[1] 王牧卿 王伟刚[1] 伏瑞敏[1] 李永强[1] GUO Yongxiang;KE Junyu;WANG Muqing;WANG Weigang;FU Ruimin;LI Yongqiang(Beijing Institute of Space Mechanics&Electricity,Beijing 100094,China)

机构地区：[1]北京空间机电研究所,北京100094

出　　处：《航天返回与遥感》2022年第6期79-84,共6页Spacecraft Recovery & Remote Sensing

基　　金：国家重大科技专项工程。

摘　　要：日光诱导叶绿素荧光超光谱探测仪具有更高的光谱分辨率及更多的光谱通道,而杂散光是影响超光谱探测仪光谱测量精度的关键因素之一。陆地生态系统碳监测卫星搭载的超光谱探测仪为光栅式光谱仪,其入射和出射狭缝的存在使得系统本身杂散光的抑制多了一道屏障,因此该类遥感器杂散光的主要来源为视场内的杂散光。文章描述了该类杂散光的来源及特点,最后以超光谱探测仪空间维为例,建立杂散光校正数学模型,介绍了视场内杂散光分布测量方法、测量步骤,并对校正效果进行了分析。结果表明,杂光分布影响因子d和杂光分布因子矩阵D可正确表征光谱仪的杂散光特性。Solar-induced Chlorophyll Fluorescence Imaging Spectrometer has higher spectral resolution and more spectral channels. Stray light is one of the key factors affecting the spectral measurement accuracy of the hyperspectral detector. The detector is a grating spectrograph,and the existence of entrance and exit slits is beneficial to stray light suppression. Therefore, stray light mainly comes from the field of view. This paper describes the performance of this kind of stray light, and gives the definition and ph ysical meaning of crosstalk.Finally, taking the spatial dimension of the detector as an example, the mathematical model of stray light correction is established. The measurement method, measurement procedure and correction effect of stray light distribution are introduced. The results show that the stray light distribution factor d and the stray light distribution factor matrix D can correctly characterize the stray light characteristics of the spectrometer.

关 键 词：杂散光测量 杂散光校正 视场内杂散光 超光谱探测仪 陆地生态系统碳监测卫星 

分 类 号：O433.1[机械工程—光学工程]