非制冷色散式成像光谱仪辐射传递模型  

Radiative transfer model of uncooled dispersive imaging spectrometer

作　　者：许洪[1] 王向军[1] 刘峰[1] 

机构地区：[1]天津大学精密仪器与光电子工程学院精密测试技术及仪器国家重点实验室,天津300072

出　　处：《红外与激光工程》2009年第1期31-35,共5页Infrared and Laser Engineering

基　　金：国防重点预研基金项目

摘　　要：根据接收信号信噪比,研究了基于非制冷微测辐射热计阵列构造色散式成像光谱仪的可行性。综合考虑目标红外辐射特性、大气传输透过率、仪器接收孔径、色散式光谱仪辐射传递特性、红外阵列探测器参数、数据链传输等环节,建立了完善的色散式长波红外成像光谱仪辐射能量传递模型。选用典型地物红外发射率数据,非制冷微测辐射热计红外焦平面阵列参数,利用低分辨率大气辐射传输计算软件LOWTRAN生成大气红外透过率曲线,依据传递模型,计算了以非制冷微测辐射热计阵列为探测器的色散式长波红外成像光谱仪可达到的光谱分辨率,验证了依据非制冷红外探测器构建小型红外成像光谱遥感器的潜力。According to the SNR of receiving signal, the feasibility of the LWIR uncooled microbolometer FPA based dispersive imaging spectrometer was studied. Considering the characteristic of target radiation, the effect of atmospheric transfer transmittance, receiving aperture of instrument, radiative transfer characteristic of dispersive spectrometer, performance parameters of the infrared detector array as well as data communication, a perfect radiative transfer model was constructed. Infrared emissivity data of several typical ground objects, and the performance parameters of the state-of-the-art uncooled microbolometer IRFPA were selected, the LOWTRAN code was utilized to generate the atmospheric transmittance curve. Spectral resolution of a LWIR dispersive imaging spectrometer based on an uncooled microbolometer FPA were calculated in terms of transfer model. The result shows the potential for using the uncooled microbolometer FPA to construct small LWIR imaging spectrometer.

关 键 词：辐射传递模型 微测辐射热计 成像光谱仪 长波红外 遥感 

分 类 号：TN21[电子电信—物理电子学] TP7[自动化与计算机技术—检测技术与自动化装置]