System design and simulation of a long-wave infrared hyperspectral imaging spectrometer

Li-yin Yuan; Wei-ming Xu; Zhi-ping He; Ying Lin; Rong Shu; Jian-yu Wang

doi:10.1117/12.836002

4 August 2009 System design and simulation of a long-wave infrared hyperspectral imaging spectrometer

Li-yin Yuan, Wei-ming Xu, Zhi-ping He, Ying Lin, Rong Shu, Jian-yu Wang

Proceedings Volume 7383, International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Infrared Imaging and Applications; 73832A (2009) https://doi.org/10.1117/12.836002
Event: International Symposium on Photoelectronic Detection and Imaging 2009, 2009, Beijing, China

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.

Citation Download Citation

Li-yin Yuan, Wei-ming Xu, Zhi-ping He, Ying Lin, Rong Shu, and Jian-yu Wang "System design and simulation of a long-wave infrared hyperspectral imaging spectrometer", Proc. SPIE 7383, International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Infrared Imaging and Applications, 73832A (4 August 2009); https://doi.org/10.1117/12.836002

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KEYWORDS

Signal to noise ratio

Spectroscopy

Staring arrays

Sensors

Infrared spectroscopy

Telescopes

Imaging systems

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