光谱学与光谱分析 |
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Study on Uniformity of Optical Field in Static Fourier Transform Spectrometer |
Lü Jin-guang1,2, LIANG Jing-qiu1*, LIANG Zhong-zhu1, FU Jian-guo1,2 |
1. State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China 2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China |
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Abstract Since the Fourier transform spectrometer based on multi-micro mirrors samples the interferogram image which corresponds to each OPD in the transverse optical field, the spatial distribution of the irradiance has much effect on the quality of the interferogram. In the present paper, distribution function is introduced in this spectrometer system. By means of simulation, the contrast of the interferogram modulated by distribution function is depressed in the fringe area and the concomitant line appears in the spectrum. According to theory analysis, the decline of the contrast lies on the distribution function which scans the interferogram periodically. And the concomitant line is the effect of the spectrum shift, which belongs to the modulation function. Finally, the difference image and conversed recovery arithmetic are proposed. Via the simulation, the conversed recovery arithmetic can recover the interferogram and the spectrum evidently.
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Received: 2011-04-20
Accepted: 2011-08-16
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Corresponding Authors:
LIANG Jing-qiu
E-mail: liangjq@ciomp.ac.cn
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