Measurement of infrared radiation based on real-time calibration of atmospheric correction parameters

Fupu Chen; Tao Qi; Shaofei Wang; Peng Zhang

doi:10.1117/12.2663346

12 April 2023 Measurement of infrared radiation based on real-time calibration of atmospheric correction parameters

Fupu Chen, Tao Qi, Shaofei Wang, Peng Zhang

Proceedings Volume 12565, Conference on Infrared, Millimeter, Terahertz Waves and Applications (IMT2022); 125653U (2023) https://doi.org/10.1117/12.2663346
Event: Conference on Infrared, Millimeter, Terahertz Waves and Applications (IMT2022), 2022, Shanghai, China

Abstract

Infrared radiation characteristic measurement uses the infrared thermal imager that has been calibrated to measure and invert the infrared radiation characteristics of the target, which is a direct method to obtain the real radiation characteristics of the target. This paper proposes a method for infrared radiation characteristics based on real-time calibration of atmospheric correction parameters. This method first completes the radiation calibration of the long-wave thermal imager, then uses the surface blackbody as the standard radiation source, and uses the long-wave thermal imager to obtain the actual atmospheric transmittance. By establishing an exponential model, the correction factor between the theoretical atmospheric transmittance calculated by MODTRAN and the measured atmospheric transmittance is obtained, and the theoretical atmospheric transmittance calculated by MODTRAN is corrected by this correction factor, so that the measurement and inversion of the infrared radiation characteristics of the target to be measured can be realized. The experimental results show that the error of the target characteristic measurement result obtained by this method is less than 5%, which is higher than the traditional target radiation characteristic measurement accuracy obtained by directly using MODTRAN to correct the influence of atmospheric transmission.

Citation Download Citation

Fupu Chen, Tao Qi, Shaofei Wang, and Peng Zhang "Measurement of infrared radiation based on real-time calibration of atmospheric correction parameters", Proc. SPIE 12565, Conference on Infrared, Millimeter, Terahertz Waves and Applications (IMT2022), 125653U (12 April 2023); https://doi.org/10.1117/12.2663346

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