Abstract

The contribution of some region in an opaque multiple-scattering sample to the detected signal is considered. Because diffusion theory gives only the total photon concentration and not the fraction of that which ultimately reaches the detector, it must be supplemented. We show how to do so by making further use of the assumption that photon migration is Markovian. This procedure is illustrated for illumination–detection geometries and scattering parameters of interest for diffusing-light spectroscopies. Specifically, we explore slab geometries with plane-wave illumination and detection as well as a semi-infinite sample with point illumination and detection. For the former the photon behavior as a function of slab thickness, scattering anisotropy, absorption, and boundary reflectivity is predicted and shown to compare well with Monte Carlo random-walk simulations.

© 2001 Optical Society of America

Angular distribution of diffusely backscattered light

M. U. Vera, P.-A. Lemieux, and D. J. Durian
J. Opt. Soc. Am. A 14(10) 2800-2808 (1997)

Path-length-resolved dynamic light scattering: modeling the transition from single to diffusive scattering

Adam Wax, Changhuei Yang, Ramachandra R. Dasari, and Michael S. Feld
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Diffusing-wave spectroscopy for arbitrary geometries: numerical analysis by a boundary-element method

Loïc Vanel, Pierre-Anthony Lemieux, and Douglas J. Durian
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Scattering optics of foam

Moin U. Vera, Arnaud Saint-Jalmes, and Douglas J. Durian
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Spatially resolved backscattering: implementation of extrapolation boundary condition and exponential source

D. J. Durian and J. Rudnick
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