| 光谱学与光谱分析 |
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| Full-Field and Automatic Methodology of Spectral Calibration for PGP Imaging Spectrometer |
| SUN Ci1, 2, Bayanheshig1*, CUI Ji-cheng1, PAN Ming-zhong1, LI Xiao-tian1, TANG Yu-guo1 |
1. Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
2. University of Chinese Academy of Sciences, Beijing 100049, China |
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Abstract In order to analyze spectral data quantitatively which is obtained by prism-grating- prism imaging spectrometer, spectral calibration is required in order to determine spectral characteristics of PGP imaging spectrometer, such as the center wavelength of every spectral channel, spectral resolution and spectral bending. A spectral calibration system of full field based on collimated monochromatic light method is designed. Spherical mirror is used to provide collimated light, and a freely sliding and rotating folding mirror is adopted to change the angle of incident light in order to realize full-field and automatic calibration of imaging spectrometer. Experiments of spectral calibration have been done for PGP imaging spectrometer to obtain parameters of spectral performance, and accuracy analysis combined with the structural features of the entire spectral calibration system have been done. Analysis results indicate that spectral calibration accuracy of the calibration system reaches 0.1 nm, and the bandwidth accuracy reaches 1.3%. The calibration system has merits of small size, better commonality, high precision and so on, and because of adopting the control of automation, the additional errors which are caused by human are avoided. The calibration system can be used for spectral calibration of other imaging spectrometers whose structures are similar to PGP.
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Received: 2013-08-21
Accepted: 2013-11-20
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Corresponding Authors:
Bayanheshig
E-mail: bayin888@sina.com
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