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Study of diffuse reflectance based on a hybrid diffusion approximation and simulating experiment

Tian Hui-Juan Liu Ying Wang Li-Jun Zhang Zhi-Bo Xiao Li-Feng

Study of diffuse reflectance based on a hybrid diffusion approximation and simulating experiment

Tian Hui-Juan, Liu Ying, Wang Li-Jun, Zhang Zhi-Bo, Xiao Li-Feng
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  • Received Date:  24 February 2008
  • Accepted Date:  25 April 2008
  • Published Online:  20 January 2009

Study of diffuse reflectance based on a hybrid diffusion approximation and simulating experiment

  • 1. 天津大学理学院物理系,光电信息技术科学教育部重点实验室,天津 300072

Abstract: A modified diffusion approximation is investigated. In this theoretical model, diffusion coefficient D of the standard diffusion approximation is substituted by diffusion coefficient Dasym of P3 approximation. Analytic solution RHybrid(ρ) of this hybrid diffusion for reflectance in single source approximation and steady-state case with extrapolated boundary is obtained; influences of the transport albedo a′ on the standard diffusion approximation RDA(ρ) and the hybrid diffusion approximation RHybrid(ρ) are compared; recovering of optical parameters from diffuse reflectance RHybrid(ρ) is demonstrated, and the errors and application ranges are studied. The results show that this hybrid diffusion approximation RHybrid(ρ) can be used in strong absorption media and at short source-detector separation.

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