Noise model analysis and verification of short wave hyperspectral imaging system based on S-matrix coding

1.Key Laboratory of Space Active Opto-Electronics Technology, Chinese Academy of Sciences, Shanghai 200083, China;2.University of Chinese Academy of Sciences, Beijing 100049, China;3.Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China

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Supported by Youth Innovation Promotion Association(2017286), National Natural Science Foundation of China (6160523), Major Project of High Resolution Earth Observation System (GFZX04014308)

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    Based on the noise suppression effect of weighing measurement principle, a short-wave infrared spectral imaging method based on S-matrix slit array was proposed. By constructing S-matrix slit array to replace the single slit of spectral imaging system, the aliasing measurement of spatial and spectral information was realized. The detector noise and photon noise of the system were analyzed and the noise suppression effect was calculated. The simulation results show that this method can effectively reduce the noise level and improve the imaging quality of low light conditions. The principle prototype was built for imaging experiment. The imaging target was a homogeneous object. By comparing the imaging data onto a single slit, the spectral imaging method of the S-matrix slit array was used to increase the SNR by 9% and 21% respectively under 23% and 10% detector potential well light intensity.

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TANG Guo-Liang, LI Chun-Lai, LIU Shi-Jie, XU Rui, XU Yan, YUAN Li-Yin, WANG Jian-Yu. Noise model analysis and verification of short wave hyperspectral imaging system based on S-matrix coding[J]. Journal of Infrared and Millimeter Waves,2021,40(6):847~857

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  • Received:February 03,2021
  • Revised:December 02,2021
  • Adopted:May 14,2021
  • Online: December 02,2021
  • Published: