Mar. 2021

Article Contents

Chinese Optics> 2021> 14(2): 382-389.

AN Ling-ping, WANG Shuang, ZHANG Geng, LI Juan, LIU Xue-bin. Corrective method for spectral offset error caused by radial distortion in the large aperture static imaging spectrometer[J]. Chinese Optics, 2021, 14(2): 382-389. doi: 10.37188/CO.2020-0084

Citation:

AN Ling-ping, WANG Shuang, ZHANG Geng, LI Juan, LIU Xue-bin. Corrective method for spectral offset error caused by radial distortion in the large aperture static imaging spectrometer[J].Chinese Optics, 2021, 14(2): 382-389.doi:10.37188/CO.2020-0084

Citation:

AN Ling-ping, WANG Shuang, ZHANG Geng, LI Juan, LIU Xue-bin. Corrective method for spectral offset error caused by radial distortion in the large aperture static imaging spectrometer[J].Chinese Optics, 2021, 14(2): 382-389.doi:10.37188/CO.2020-0084

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Corrective method for spectral offset error caused by radial distortion in the large aperture static imaging spectrometer

doi:10.37188/CO.2020-0084

1.
Key Laboratory of Spectral Imaging Technology, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China

Funds:Supported by National Key R&D Program of China (No. 2018YFB0504900, No. 2018YFB0504901)

More Information

Corresponding author:wangshuang@opt.ac.cn
Received Date:08 May 2020
Rev Recd Date:15 Jun 2020

Available Online:08 Feb 2021

Publish Date:23 Mar 2021

Abstract

Abstract

In order to improve the spectral calibration accuracy of the large aperture static imaging spectrometer when its field of view is increased, and to reduce the influence of radial distortion on its spectral accuracy, we propose a corrective method for spectral calibration coefficients based on a spectral distortion correlation model. To begin the process, the wave number and wavelength correction formulas are given. Using 594.1 nm and 632.8 nm gas lasers, a spectroscopic imaging experiment was performed on the imaging spectrometer, and the data was processed and analyzed. The results show that when there is a barrel distortion of 0.3%, the inversion spectrum at the edge of the field of view shifts approximately 2 nm. After implementing the corrective method of this paper, the line shift is reduced to approximately 0.1 nm. This method only needs to be corrected according to the lens distortion parameters, which simplifies the laboratory spectral calibration process and improves work efficiency. It can also be applied to the orbit parameter correction of spaceborne interference spectral data.
- Large Aperture Static Imaging Spectrometer (LASIS),
- spectral calibration,
- error correction,
- distortion simulation

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References (20)

References

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