Experimental study of the effect of laser parameters on active laser infrared radiation thermometry

Xinyu Wang; Baolin An; Yunlong Zhao; Xuyao Song; Luge Sun; Wei Dong; Quanying Yan; Huixing Zhai; Xiaofeng Lu

doi:10.1117/12.2651886

20 January 2023 Experimental study of the effect of laser parameters on active laser infrared radiation thermometry

Xinyu Wang, Baolin An, Yunlong Zhao, Xuyao Song, Luge Sun, Wei Dong, Quanying Yan, Huixing Zhai, Xiaofeng Lu

Proceedings Volume 12555, AOPC 2022: Infrared Devices and Infrared Technology; and Terahertz Technology and Applications; 125550M (2023) https://doi.org/10.1117/12.2651886
Event: Applied Optics and Photonics China 2022 (AOPC2022), 2022, Beijing, China

Abstract

Accurate measurement of the true surface temperature of high-temperature materials is very important in many fields, such as modern industrial systems, solar heat utilization and metrology. At present, passive radiation thermometry is mainly used to measure the real surface temperature of high-temperature materials. This technology cannot get rid of the influence of emissivity on temperature measurement accuracy. The active laser infrared radiation thermometry is a new emissive-free temperature measurement technology. Based on the active thermometry of dual-wavelength infrared laser, with the condition of environmental reflection interference and unknown emissivity, the true surface temperature of high-temperature material is precisely measured and studied. Based on the theoretical model of active dual-wavelength infrared laser thermometry, an active laser thermometry system was built and upgraded in this study. The active temperature measurement experiments of changing laser power were carried out to analyze the influence of laser power on the accuracy of active temperature measurement. Then the active temperature measurement experiments were carried out by changing the laser modulation frequency to analyze the influence of the laser modulation frequency on the active temperature measurement accuracy. The results show that the reasonable selection of laser parameters(laser power and laser modulation frequency) is the key to carrying out precision temperature measurement based on active laser infrared radiation thermometry.

Citation Download Citation

Xinyu Wang, Baolin An, Yunlong Zhao, Xuyao Song, Luge Sun, Wei Dong, Quanying Yan, Huixing Zhai, and Xiaofeng Lu "Experimental study of the effect of laser parameters on active laser infrared radiation thermometry", Proc. SPIE 12555, AOPC 2022: Infrared Devices and Infrared Technology; and Terahertz Technology and Applications, 125550M (20 January 2023); https://doi.org/10.1117/12.2651886

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KEYWORDS

Temperature metrology

Thermometry

Modulation

Infrared radiation

Calibration

Radiation thermometry

Infrared lasers

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