基于拟合算法的傅里叶变换光谱仪光谱反演  

Spectrum recovery method of the Fourier transform spectrometer based on fitting algorithm

作　　者：李涛[1] 华建文[1] 孙晓杰[1] 陈仁[1] 

机构地区：[1]中国科学院上海技术物理研究所,上海200083

出　　处：《光学仪器》2015年第6期504-508,共5页Optical Instruments

基　　金：国家国防科技工业局"十二五"民用航天课题(Y1K1300G0)

摘　　要：在傅里叶变换光谱仪(FTS)中,精确获取每个干涉信号采样点处的光程差是获取光谱图的关键。动镜速度的波动会对等时间采样造成采样误差,而当目标光源波长较短时无法直接利用传统方法进行等光程差采样。分析了速度波动误差对光谱的影响,并提出了一种基于拟合算法计算干涉信号每个采样点处光程差的方法,在动镜速度波动较大的情况下对可见光波段的干涉信号进行采样反演。实验结果表明,此方法准确度高,适用于各种傅里叶变换光谱仪。In the Fourier transform spectrometer (FTS),obtaining the optical path difference of each sampling points accurately is the key of data processing.The velocity fluctuation of moving mirror will cause equal-time sampling error,and traditional equal optical path difference sampling method can not be used for visible wavelengths.The influence of speed fluctuation is analyzed and a method to calculate the optical path difference of each sampling points based on fitting algorithm is developed. The method is verified by processing the interference signal of visible light with large velocity fluctuation.The experimental results verify its correctness and effectiveness.This method can also be used in any kind of Fourier transform spectrometer.

关 键 词：傅里叶变换光谱仪 光谱反演 拟合算法 可见光谱 

分 类 号：TP911.73[自动化与计算机技术]