Design and verification of thermal infrared automatic brightness temperature radiometer

Yanna Zhang; Yunxiang Zhang; Wei Wei

doi:10.1117/12.3008010

18 December 2023 Design and verification of thermal infrared automatic brightness temperature radiometer

Yanna Zhang, Yunxiang Zhang, Wei Wei

Proceedings Volume 12960, AOPC 2023: Infrared Devices and Infrared Technology; and Terahertz Technology and Applications; 129600M (2023) https://doi.org/10.1117/12.3008010
Event: Applied Optics and Photonics China 2023 (AOPC2023), 2023, Beijing, China

Abstract

In order to meet the requirements of high precision automatic measurement of surface brightness temperature, which is used for in-orbit calibration and product verification of infrared remote sensor, the design and verification of field thermal infrared brightness temperature radiometer are studied. The difference and compensation method is used to obtain the radiance of the ground target. First, the thermopile detector is used to measure the target and the background respectively for difference, and then the standard platinum resistance is used to improve the measurement accuracy. The optical spectrum of 8~14 μm, 8.2~9.2 μm, 10.3~ 11.3 μm, 11.5~l2.5 μm is achieved by the optical spectrum and rotation of the filter wheel, and the photoelectric amplification and acquisition are realized by the high-precision pre-amplification and acquisition circuit. After the radiometer is developed, radiation calibration based on the surface source blackbody is carried out, and the temperature measurement is compared with the laboratory water blackbody. The deviation of measurement is less than 0.14K. The field thermal infrared bright temperature radiometer was compared with thermal infrared radiometer CE312 in the field, and the average deviation of the two devices was less than 0.12K, which verified the feasibility and rationality of the temperature measurement method.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Yanna Zhang, Yunxiang Zhang, and Wei Wei "Design and verification of thermal infrared automatic brightness temperature radiometer", Proc. SPIE 12960, AOPC 2023: Infrared Devices and Infrared Technology; and Terahertz Technology and Applications, 129600M (18 December 2023); https://doi.org/10.1117/12.3008010

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KEYWORDS

Radiometry

Infrared radiation

Temperature metrology

Thermography

Calibration

Black bodies

Infrared sensors

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