Analysis for signal-to-noise ratio of hyper-spectral imaging FTIR interferometer

Xun-niu Li; Wei-jian Zheng; Zheng-gang Lei; Hai-yang Wang; Yan-peng Fu

doi:10.1117/12.2034680

30 August 2013 Analysis for signal-to-noise ratio of hyper-spectral imaging FTIR interferometer

Xun-niu Li, Wei-jian Zheng, Zheng-gang Lei, Hai-yang Wang, Yan-peng Fu

Proceedings Volume 8910, International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Spectrometer Technologies and Applications; 89101P (2013) https://doi.org/10.1117/12.2034680
Event: ISPDI 2013 - Fifth International Symposium on Photoelectronic Detection and Imaging, 2013, Beijing, China

Abstract

Signal-to-noise Ratio of hyper-spectral imaging FTIR interferometer system plays a decisive role on the performance of the instrument. It is necessary to analyze them in the development process. Based on the simplified target/background model, the energy transfer model of the LWIR hyper-spectral imaging interferometer has been discussed. The noise equivalent spectral radiance (NESR) and its influencing factors of the interferometer system was analyzed, and the signal-to-noise（SNR） was calculated by using the properties of NESR and incident radiance. In a typical application environment, using standard atmospheric model of USA(1976 COESA) as a background, and set a reasonable target/background temperature difference, and take Michelson spatial modulation Fourier Transform interferometer as an example, the paper had calculated the NESR and the SNR of the interferometer system which using the commercially LWIR cooled FPA and UFPA detector. The system noise sources of the instrument were also analyzed in the paper. The results of those analyses can be used to optimize and pre-estimate the performance of the interferometer system, and analysis the applicable conditions of use different detectors. It has important guiding significance for the LWIR interferometer spectrometer design.

Citation Download Citation

Xun-niu Li, Wei-jian Zheng, Zheng-gang Lei, Hai-yang Wang, and Yan-peng Fu "Analysis for signal-to-noise ratio of hyper-spectral imaging FTIR interferometer", Proc. SPIE 8910, International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Spectrometer Technologies and Applications, 89101P (30 August 2013); https://doi.org/10.1117/12.2034680

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