高信噪比云与气溶胶探测仪成像系统设计  

Design of imaging system of cloud and aerosol polarization imager with high signal-to-noise ratio

作　　者：李帅[1,2] 徐抒岩 刘栋斌[1] 张航[1] Li Shuai;Xu Shuyan;Liu Dongbin;Zhang Hang(Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033 [2]中国科学院大学,北京100049

出　　处：《红外与激光工程》2018年第11期308-315,共8页Infrared and Laser Engineering

基　　金：国家"863"计划重大项目(2011AA12A103);国家"863"计划(2015AA123801-02)

摘　　要：为获取高信噪比的气溶胶遥感数据,针对光谱仪成像系统链路分析了影响云与气溶胶探测仪信噪比的关键因素。结合光谱仪成像电路系统的响应模型,确定了电子学系统信噪比的表达式,针对可见探测器和红外探测器。提出了模块化的高信噪比成像光谱仪电路系统的设计方法,并描述了云与气溶胶探测仪成像电路系统从总体设计到模块设计的完整研制方案。对云与气溶胶探测仪进行辐射定标试验,试验结果表明:可见单机各通道在典型辐亮度条件下最小信噪比为50.9 dB,红外单机各通道在典型辐亮度条件下最小信噪比为62.3 d B,满足指标要求。针对可见探测器和红外探测器的成像电路系统设计方法对其他光谱仪电路系统设计具有借鉴意义。To capture the space-borne remote sensing aerosol data with high signal-to-noise ratio(SNR),according to the chain of the imaging system,the main factors on the SNR of spectrometer were presented.Combined with the imaging system response model and the expression of SNR,a modular design method for high SNR of spectrometer imaging circuit system was proposed for visible detectors and infrared detectors.From the overall design to the module design of Cloud and Aerosol Polarization Imager(CAPI)imaging circuit development plan was described.The radiation calibration experimental results indicate that the minimum SNR of visible channel image under typical radiance conditions is 50.9 dB,the minimum SNR of infrared channel image under typical radiance conditions is 62.3 dB.The design method of visible detectors and infrared detectors provides references for other spectrometer imaging circuit system in remote sensing fields.

关 键 词：电荷耦合器件 光谱仪 信噪比 云与气溶胶探测仪 辐射定标 

分 类 号：TN386.5[电子电信—物理电子学]