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| Optical Pyrometry of Semi-transparent Optical Materials |
| LIU Jiang-fan,FU Tai-ran,ZHAO Huan |
| Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering, Tsinghua University, Beijing 100084, China |
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Abstract For the need of temperature measurements of optical materials in applications and the technique limitation of traditional measurement methods, the optical pyrometry of semi-transparent optical materials is investigated. Based on the analysis of the radiative transfer process of one-dimensional semi-transparent media, the effective spectral intensity and effective emissivity models are established for non-scattering media at the mirror reflection boundary condition. The effective emissivity represents the radiation coupling information of the emitting radiation of materials, the reflected radiation and the transmission radiation from background environments. Choosing the CVD-ZnS infrared optical material as the example, the effective spectral emissivity of CVD-ZnS is analyzed at various reflection, transmission sources and material temperatures.
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2015, Vol. 36 
