Similarity relations in multiple scattering through turbid media: a Monte Carlo evaluation

摘要

Abstract: We discuss the validity and the precision of scaling principles which can be used to transform problems of radiative transfer in media that scatter anisotropically (g $DNEQ 0, g being the mean cosine of the scattering angle) to equivalent isotropic problems (g $EQ 0). A Monte Carlo model is used to calculate the reflection (R) and the transmission (T) factors for a collimated incident beam on an anisotropically scattering media, for a wide range of absorption ($kappa@) and scattering ($sigma@) coefficients per unit length. The results (R,T) obtained for anisotropic scatterers (g $DNEQ 0, $kappa@, $sigma@) are systematically compared to those (R$PRM@, T$PRM@) obtained in the case of the equivalent isotropic configuration (g$PRM $EQ 0, $kappa$PRM@, $sigma$PRM@) as deduced from the similarity relations. !27