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Proceedings Paper

System design and simulation of a long-wave infrared hyperspectral imaging spectrometer
Author(s): Li-yin Yuan; Wei-ming Xu; Zhi-ping He; Ying Lin; Rong Shu; Jian-yu Wang
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Paper Abstract

A ground-based long-wave hyperspectral imaging spectrometer (LWHIS) is designed and simulated. The spectrometer is based on a focal plane array detector with a spectral response that covers the range 7700 to 9300 nm. Optical system of this instrument is all-reflective and provides up to 30 continuous spectral channels with 54 nm of dispersion per pixel. The entrance aperture is 20 mm and feeds an F/2 telescope front end. The telescope has a 11-deg field of view with 256 spatially resolved elements (detector pixel size is 30 μm). To get high enough signal noise rate (SNR), no concern about the electronic part, first, the cool stop of the detector is used as soon as possible, and second, background thermal radiance of the opto-mechanical system seen by the focal plane must be suppressed. Thus, the entire instrument is set in a vacuum chamber and the opto-mechanical subsystem is cooled by liquid nitrogen. The background thermal radiance verse different cases is discussed. Based on the radiation simulation and analysis, if the opto-mechanical subsystem of the spectrometer within the vacuum chamber is cooled blew 100 Kelvin, significant performance gains can be realized. The design and simulation provides an example for illustrating the design principles specific and radiation simulation to this type of system.

Paper Details

Date Published: 4 August 2009
PDF: 7 pages
Proc. SPIE 7383, International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Infrared Imaging and Applications, 73832A (4 August 2009); doi: 10.1117/12.836002
Show Author Affiliations
Li-yin Yuan, Shanghai Institute of Technical Physics (China)
Wei-ming Xu, Shanghai Institute of Technical Physics (China)
Zhi-ping He, Shanghai Institute of Technical Physics (China)
Ying Lin, Shanghai Institute of Technical Physics (China)
Graduate School of the Chinese Academy of Sciences (China)
Rong Shu, Shanghai Institute of Technical Physics (China)
Jian-yu Wang, Shanghai Institute of Technical Physics (China)


Published in SPIE Proceedings Vol. 7383:
International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Infrared Imaging and Applications
Jeffery Puschell; Hai-mei Gong; Yi Cai; Jin Lu; Jin-dong Fei, Editor(s)

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