Analysis of Collimation Error in Fourier Transform Infrared Spectrometer Based on Step Mirrors

被引:4
作者
Lu Jin-guang [1 ,2 ]
Liang Zhong-zhu [1 ]
Fu Jian-guo [1 ,2 ]
Liang Jing-qiu [1 ]
机构
[1] Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, State Key Lab Appl Opt, Changchun 130033, Peoples R China
[2] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
关键词
Fourier transform spectrometer; Collimation error; Reverse of contrast; Side slope noise;
D O I
10.3964/j.issn.1000-0593(2011)10-2865-05
中图分类号
O433 [光谱学];
学科分类号
0703 ; 070302 ;
摘要
The collimation error in Fourier transform spectrometer has many effects on the interferogram and the spectrogram. By means of modulation, the authors found the reverse of contrast in the interferogram and the side slope noise in the spectrogram due to the collimation error. The authors analyzed the signal-to-noise ratio and resolution at different factor of beam divergence. When the factor of the beam divergence is 0. 15 degrees.mm(-1), the signal-to-noise ratio can reduce to 6 dB and the resolution can go bad to 13. 4 cm(-1).
引用
收藏
页码:2865 / 2869
页数:5
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