空间外差光谱仪干涉图数据处理  

Data Processing for Interferogram of Spatial Heterodyne Spectrometer

作　　者：叶松[1,2] 熊伟[3] 乔延利[3] 洪津[3] 方勇华[3] 

机构地区：[1]航天信息股份有限公司数字技术研究院,北京100097 [2]中国科学技术大学,安徽合肥230027 [3]中国科学院安徽光学精密机械研究所,安徽合肥230031

出　　处：《光谱学与光谱分析》2009年第3期848-852,共5页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(60678056);“863”计划项目(2006AA12Z131)资助

摘　　要：空间外差光谱技术是一种新型的超分辨光谱技术。介绍了空间外差光谱仪的基本原理,并针对其特点提出了干涉图数据处理的方法。首先通过一阶差分对干涉图进行去基线处理,然后使用三角函数作为切趾函数对干涉图进行切趾,并对傅里叶变换光谱进行相位校正,最后采用已知双线光源对空间外差光谱仪原理试验装置进行波长定标。文章以Na双线与Hg谱线进行波长定标,得到了波长定标曲线。通过以上的方法对空间外差光谱仪干涉图数据进行处理,能有效地提高干涉图反演光谱的精度。Spatial heterodyne spectroscopy （SHS） is a new spectroscopic technique which can achieve high spectral resolution. The basic concepts of spatial heterodyne spectrometer was described, A method of data processing for interferogram of spatial heterodyne spectrometer was presented based on its characteristics. First order difference was performed for eliminating the baseline of interferogram. The triangular function was chosen as apodization function. The process of phase correction for Fourier transform spectrum is described. The wavelength calibration curve of SHN experimental system was obtained by measur- ing sodium light double line and mercury light double line. The spectral inversion accuracy of spatial heterodyne spectrometer can be effectively improved by use of this method.

关 键 词：空间外差光谱仪 干涉图 切趾 相位校正 波长定标 

分 类 号：O433[机械工程—光学工程]