研究了使用傅里叶变换红外光谱仪测量材料发射率的方法,采用多温度法对光谱仪的背景函数进行实时的测量和修正,提高了发射率测量的准确度,设计了三抛物面镜的光学系统,光学视场满足测量的要求。使用本系统测量了某样品的光谱发射率,相对不确定度小于2%。 The method of measuring the emissivity of the material by using the Fourier transform infrared spectrometer is studied. The multi-temperature method is used to measure and correct the background function of the spectrometer in real time. The accuracy of the emissivity measurement is improved. The optical system of three parabolic mirrors is designed. Optical field to meet the measurement requirements. The system was used to measure the spectral emissivity of a sample with a relative uncertainty of less than 2%.