| Citation: | LV Jin-guang, LIANG Jing-qiu, ZHAO Bai-xuan, ZHAO Ying-ze, ZHENG Kai-feng, CHEN Yu-peng, WANG Wei-biao, QIN Yu-xin, TAO Jin. Panoramic bispectral infrared imaging interference spectrum measurement inversion instrument[J]. Chinese Optics, 2022, 15(5): 1092-1104. doi: 10.37188/CO.2022-0114
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In order to satisfy the urgent needs of on-line real-time monitoring and analysis instrument for industrial pollution emission and sudden safety accidents, a panoramic bispectral infrared imaging interference spectrum measurement inversion instrument is proposed. Through the collaborative design of dual channel interference system, dual spectral imaging system, azimuth and elevation axis system, the measurement of image spectrum information of target scene with large field of view, wide spectral band and high resolution is realized. First, based on Fourier optics theory, the scalar diffraction theoretical model of interference imaging spectrum is established. Then based on broadband sampling and narrowband sampling theory, the sampling design of dual channel interference system is carried out. Based on the analysis of the interference imaging characteristics, the optical design of the dual band imaging system is carried out. Finally, the principle prototype is completed, and the telemetry experiment of the gas plume emitted by the chimney is carried out. The instrument can realize spectral measurement with resolution of 4 cm−1 in large field of view by 360°×60° and wide spectral range from 3~5 μm to 8~12 μm. The instrument can satisfy the application requirements of qualitative identification and quantitative analysis for gas emission monitoring.
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