%0 Journal Article
%T Compensating Nonlinearity of Optical Path Difference of Rotary Fourier Transform Spectrometer with Fitting Interferogram<br>转镜式傅里叶变换光谱仪光程差非线性的拟合法补偿
%A Yang Xiaoxu
%A Zhou Sizhong
%A XiangLi Bin
%A <br>杨晓许
%A 周泗忠
%A 相里斌
%J 光子学报
%D 2005
%I 
%X Because of rotating reflector or refractor,there is nonlinearity of Optical Path Difference(OPD) in high-speed rotary FT-Spectrometer.Nonlinearity which was studied to direct engineering in this paper is a very important aspect to be considered in designing system. In nonlinear OPD system,interferogram is sampled linearly,which brings interferogram phase and period error.The case corresponds to the interferogram without those errors sampled nonlinearly.Interferogram without phase and period errors can be reconstructed with those interferogram data sampled in unequal intervals through fitting polynomial.Then the reconstructed interferogram is sampled in equal intervals.Those data are used to reconstruct spectrum without noise caused by OPD nonlinearity.Computer simulation shows this method is effective,and fits interferogram with quartic polynomial well.The method is also effective in other nonlinear OPD systems.
%K Optical engineering
%K Rotary interference spectrometer
%K Polynomial fitting
%K Nonlinearity compensating<br>光学工程
%K 转镜式傅里叶变换光谱仪
%K 光程差
%K 非线性补偿
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=9F6139E34DAA109F9C104697BF49FC39&aid=92F6EB6EFA72AAC0&yid=2DD7160C83D0ACED&vid=339D79302DF62549&iid=708DD6B15D2464E8&sid=3C4387F16C0A0126&eid=6F76CBC90E48A1BC&journal_id=1004-4213&journal_name=光子学报&referenced_num=1&reference_num=10