9 research outputs found
Analytic evaluation of diffuse fluence error in multi-layer scattering media with discontinuous refractive index
A simple analytic method of estimating the error involved in using an
approximate boundary condition for diffuse radiation in two adjoining
scattering media with differing refractive index is presented. The method is
based on asymptotic planar fluences and enables the relative error to be
readily evaluated without recourse to Monte Carlo simulation. Three examples of
its application are considered: (1) evaluating the error in calculating the
diffuse fluences at a boundary between two media with differing refractive
index and dissimilar scattering properties (2) the dependence of the relative
error in a multilayer medium with discontinuous refractive index on the ratio
of the reduced scattering coefficient to the absorption coefficient ms'/ma (3)
the parametric dependence of the error in the radiant flux Js at the surface of
a three-layer medium. The error is significant for strongly forward biased
scattering media with non-negligible absorption and is cumulative in
multi-layered media with refractive index increments between layers.Comment: 21 pages 7 Figures Text further revise