Abstract：In order to meet the requirements of infrared radiation calibration of infrared instrument in the complex environment on site, two sets of portable infrared thermal radiation sources were developed with high stability and the effective radiation surface is 400mm×400mm. One of them adopted the principle of temperature control based on closed fluid, and mainly worked in a relatively low temperature working area 10℃ lower than the ambient temperature, which was used as a reference low temperature point for environmental radiation. The other set adopted the principle of large-area TEC temperature control, which mainly worked in a relatively high temperature working area 10℃ higher than the ambient temperature. The surface emissivity of the two sets of infrared radiation sources was higher than 0.97, the temperature control stability was better than 0.01℃/h, and the surface temperature uniformity of the infrared radiation source was better than 0.2℃.
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2023, Vol. 44 
