常温黑体光谱发射率校准技术研究

Research on Calibration Technology of Spectral Emissivity of Blackbody at Normal Temperature

为了能够实现常温状态下的黑体光谱发射率的准确测量,基于连续可调激光器,搭建了一套中红外波段黑体光谱发射率测量装置。采用自行设计10 mA恒流源对MCT探测器进行驱动,测量结果的动态范围从7.29×10^(4)提高到4.32×10^(5),有效提升了探测系统的动态范围。该装置实现了覆盖光谱范围7.5~10.6μm,发射率测量量值范围0.01~0.9999的高精度测量,最优不确定度为4.0×10^(-5)(k=2)。

In order to realize the accurate measurement of blackbody spectral emissivity at room temperature,a set of mid-infrared blackbody spectral emissivity measurement device is built based on continuous tunable laser.The MCT detector is driven by a self-designed 10 mA constant current source,and the dynamic range of the measurement results ranges from 7.29×10^(4)to 4.32×10^(5),effectively improving the dynamic range of the detection system.The device achieves the high-precision measurement of emissivity,the spectral range covers 7.5~10.6μm,the emissivity measurement value ranging from 0.01 to 0.9999,the optimal uncertainty is 4.0×10^(-5)(k=2).