绝对辐射计溯源至低温辐射计实验测试  

Experimental Study on Traceability of Absolute Radiometer to Cryogenic Radiometer

作　　者：张俊超[1] 徐楠[1] 许宁 孟海凤[1] 刘文德[1] 蔡川[1] 张碧丰[1] 满帅 王萌 李因亮 熊利民[1] Zhang Junchao;Xu Nan;Xu Ning;Meng Haifeng;Liu Wende;Cai Chuan;Zhang Bifeng;Man Shuai;Wang Meng;Li Yinliang;Xiong Limin(Division of Metrology in Optics and Laser,National Institute of Metrology,Beijing 100029,China)

机构地区：[1]中国计量科学研究院光学与激光计量科学研究所,北京100029

出　　处：《光学学报》2022年第5期105-110,共6页Acta Optica Sinica

基　　金：国家重点研发计划(2018YFB1500900)。

摘　　要：开展了绝对辐射计溯源至低温辐射计的计量技术研究。选用激光作为光源,采用光斑非全覆盖绝对辐射计接收面的辐射功率模式进行校准实验。利用溯源至低温辐射计的陷阱探测器作为标准器定标激光器功率,然后通过替代法将量值传递至绝对辐射计。通过绝对辐射计光阑面积校准,实现激光功率与绝对辐射计测量辐照度的转化。通过对陷阱探测器的校准、绝对辐射计锥腔不同位置空间响应均匀性、锥腔的波长选择性等特性的分析,对实验所用绝对辐射计校准不确定度进行了详细评估,得到的校准不确定度为0.86%(包含因子k=2)。Metrological technique for traceability of an absolute radiometer to a cryogenic radiometer is studied. With laser as the light source, a calibration experiment is implemented in the radiation power mode in which the light spot does not fully cover the receiving plane of the absolute radiometer. The trap detector traceable to the cryogenic radiometer is used as the etalon to calibrate the laser, and the value is transferred to the absolute radiometer by substitution. The conversion from laser power to irradiance measured by the absolute radiometer is achieved by calibrating the aperture area of the absolute radiometer. The calibration uncertainty of the absolute radiometer used in the experiment is evaluated in detail by analyzing the calibration of the trap detector, the spatial response uniformity at different positions of the conical cavity in the absolute radiometer, and the wavelength selectivity of the cavity. The calibration uncertainty obtained is 0.86%(coverage factor k=2).

关 键 词：测量 绝对辐射计 低温辐射计 量值溯源 测量不确定度 

分 类 号：TB96[机械工程—光学工程]