Calibration technology of infrared standard transfer radiometer based on stimulated parametric down-conversion
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摘要: 基于受激参量下转换过程产生光子的相关特性，构建了一套无需制冷且只利用可见光探测器即可实现红外标准传递辐射测量的系统。首先详细描述了该红外标准传递辐射计系统的工作原理，接着利用标准黑体拟合获取了该系统的定标系数，由此得到红外标准传递辐射计温度与待测黑体响应值的关系，最后通过与水浴黑体在相同温度点的响应值所反演获取的辐射温度作比较，进一步评估和验证了该红外标准传递辐射计系统的不确定度。实验结果表明：该红外标准传递辐射计测量水浴黑体辐亮度的联合不确定度为1.64%，表明该红外标准传递辐射计可作为标准黑体到用户传感器的传递标准。Abstract: Based on the correlation properties of photons generated during the process of the stimulated parametric down-conversion, a system for infrared standard transfer radiation measurement was constructed, which required no refrigeration and only used visible light detector. Firstly, the operating principle of the infrared standard transfer radiometer system was described in detail. Then, the calibration coefficient of the system was acquired by using the standard blackbody fitting, and the relationship between the temperature of the infrared standard transfer radiometer and the response value of the blackbody to be measured was obtained. Finally, the uncertainty of the infrared standard transfer radiometer system was further evaluated and verified by being compared with the radiation temperature retrieved from the response value of water-bath blackbody at the same temperature. The experimental results show that the joint uncertainty of the infrared standard transfer radiometer for measuring the radiation brightness of the water-bath blackbody is 1.64%, indicating that the infrared standard transfer radiometer can be used as the transfer standard of the blackbody to the user sensor.
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