1. National Institute of Metrology, Beijing 100029, China
2. Xi'an Institute of Applied Optics,Xian, Shaanxi 710065, China
3. The 41st Research Institute of China Electronics Technology Group Corporation, Qingdao, Shandong 266555, China
Abstract：Cryogenic radiometer is by far the most accurate measurement system of optical radiant power, which is the fundamental quantity of detector based radiometry. In order to verify the consistency of the measurement values among different laboratories, a measurement comparison of cryogenic radiometers was organized by National Institute of Metrology as pilot laboratory, participating laboratories include the 41st Research Institute of China Electronics Technology Group Corporation and Xian Institute of Applied Optics. The comparison method, transfer standard and measurement facilities are presented, and the comparison results are analyzed. The comparison results show that the deviation of each laboratory relative to the reference value is within ±0.02%, and the comparison results prove the consistency of scales realized from different types of cryogenic radiometers in each laboratory.
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2022, Vol. 43 
