红外遥感器自身引起的背景辐射研究

红外遥感器自身引起的背景辐射研究 Study on background of space infrared optical system caused by self-emission 陈永和 1 2 first-author 陈洪达 1 2 傅雨田 1 中国科学院 上海技术物理研究所,上海,200083 中国科学院 上海技术物理研究所,上海,200083 中国科学院大学,北京,100049 中国科学院大学,北京,100049 针对折反射光学型式的红外遥感器,结合各组件辐射的传输特性,建立系统自身辐射的计算模型,分析了遥感器自身热辐射所形成的背景辐射.通过将背景辐射与目标辐射相比较,分析其对红外探测的影响,并讨论了背景辐射影响的消除方法.最后,利用该模型分析了天宫一号高光谱成像仪红外观测谱段的背景辐射,并讨论了光瞳像差的影响. Thermal emission from Infrared Radiation (IR) instrument is an important background source, which will reduce Signal-to-Noise Ratio (SNR) of the system. It is necessary to estimate background radiation due to instrument's thermal emission in opt-mechanical design phase. An analytic model about thermal emission of reflect/refract combined optical system is established here, which is used to calculate background of space IR systems. Object signal is compared with background to show how background affects SNR. Finally, methods about removing background are discussed. 热辐射 背景辐射 红外光学系统 10.11834/jrs.2014z04 2021-06-16 S1 18