Apparent emitting characteristics of semi-transparent isothermal medium layer with graded index

作者：Huang Y^*; Tan HP; Xia XL

来源：Journal of Infrared and Millimeter Waves, 2001, 20(5): 348-352.

• semi-transparent medium
• graded refractive index
• emitting characteristics
• pseudo-source adding method
• ray splitting and tracing technique

By simulating the inside thermal emission of the medium and the radiation transfer process. the apparent emitting characteristics of a semi-transparent medium layer with graded index (GRIN) was investigated. The pseudo-source adding method was combined with the ray splitting and tracing technique in simulation. When constant and linearly distributed refractive indexes were considered for an isothermal layer, the apparent directional and hemispherical emissivities were both presented and analyzed for different parameters. In addition, the influence of the discrete sub-layer number on the calculating was discussed. The results show that the graded refractive index may considerably affect the apparent emission of a semi-transparent medium layer.

• 出版日期2001-10
• 单位哈尔滨工业大学