傅里叶变换红外成像光谱仪非均匀性在线定标与校正研究

Study on Nonuniformity Online Calibration and Correction of Fourier Transform Infrared Imaging Spectrometer

由于傅里叶变换红外成像光谱仪结构的特殊性,其非均匀性在线定标与校正在工程上一直没有得到有效解决。首先对IRFPA非均匀性校正的原理与算法进行了简要阐述,在此基础上,通过对时间调制型、空间调制型及时间空间联合调制型傅里叶变换红外成像光谱仪原理结构的深入分析,针对这三种制式的光谱仪,分别研究出了相应的非均匀性在线定标与校正的方法,为星载傅里叶变换红外成像光谱仪非均匀性的在轨定标奠定了良好的技术基础。

Due to the particular structure of Fourier transform infrared imaging spectrometer, its nonuniformity online calibration and correction is always a technical problem that has not been solved in engineering. Based on brief review to the principle and algorithm of nonuniformity correction of IRFPA, through in-depth analysis of principle and structure of time modulation, space modulation type and time and space combined modulation type Fourier transform infrared imaging spectrometer, it is given that online method for non-uniformity calibration and correction of three types of Fourier transform infrared imaging spectrometer, which should establish a good technical foundation to on-orbit nonuniformity calibration and correction for Fourier transform infrared imaging spectrometer on satellite.