基于波数均匀展宽模型的全反射傅里叶变换成像光谱仪高精度光谱定标处理方法

High Precision All-Reflection Fourier Transform Imaging Spectrometer Spectral Calibration Using Homogeneous Broadening of the Wave Number Model

全反射傅里叶变换成像光谱仪ARFTIS(all-reflection Fourier transform imaging spectrometer)是基于FT成像光谱理论的一种新型仪器,它不但具有高光谱分辨率特点,而且还具有宽波段、无色差的特点,特别适合应用在宽波段成像的遥感领域。目前常用的光谱定标方法有单色法、平均法和加权平均法,但是它们各存在一定局限性,不能同时满足简便和高精度的要求。文章研究了全反射型FTIS的光谱定标理论和三种定标方法的局限性,提出了一种新的光谱定标处理实用模型。其特点是需要定标特征波长数量少、单次定标精度高、多波段平均误差小于5%、稳定性较高,可以在保证较高精度的前提下,简化定标工作,特别适用于缺少大量定标设备,或不便进行多光源定标的外场环境仪器标定工作。

All-reflection Fourier transform imaging spectrometer（ARFTIS） is a novel imaging spectrometer.The specialty is not only high spectrum resolution,but also wide band and non-chromatism.It is good for remote sensing field of wide band imaging.Single spectrum calibration,average calibration and weighted average calibration are three common calibration methods.However,they all are limited.Because they cannot meet the demand on both convenience and high precision.In the present paper,the authors propose a novel model for spectrum calibration.It can work in high precision with single spectrum calibration.At the same time,the method is steady,and the average error is less than 5% with multi-bands calibration.It provides a convenient way for the non-professional calibration situation and outer simply calibration work.