Abstract

We introduce a robust method to recover optical absorption, reduced scattering, and single-scattering asymmetry coefficients (μa, μs, g 1) of infinite turbid media over a range of (μsa) spanning 3 orders of magnitude. This is accomplished through the spatially resolved measurement of irradiance at source-detector separations spanning 0.25–8 transport mean free paths (l*). These measurements are rapidly processed by a multistaged nonlinear optimization algorithm in which the measured irradiances are compared with predictions given by the δ-P 1 variant of the diffusion approximation to the Boltzmann transport equation. The ability of the δ-P 1 model to accurately describe radiative transport within media of arbitrary albedo and on spatial scales comparable to l* is the key element enabling the separation of g 1 from μs.

© 2004 Optical Society of America

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