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Proceedings Paper

Properties of photon density waves at boundaries
Author(s): Lars Othar Svaasand; Richard Campbell Haskell; Bruce J. Tromberg; Matthew McAdams
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Paper Abstract

Optical techniques represent a valuable tool for analysis of turbid media. Recent development has emphasized dynamic measurements where either ultrashort laser pulses or high frequency amplitude modulated laser light are launched into the medium. The properties of the transmitted light range from quasi-coherent in media with limited scattering to the almost randomized incoherent behavior in strongly turbid media. The present discussion considers the influence of a boundary between a heavily scattering medium with an almost isotropic diffuse light distribution and a non-scattering medium. This case can be approximated in terms of well established solutions of the diffusion equation. It is further demonstrated that the somewhat composite mathematical expressions can be interpreted in a very simple, intuitive manner. This type of approximation is, of course, of limited validity in the surface layer itself. However, the simplicity of this approximation might make it a valuable tool for several applications.

Paper Details

Date Published: 14 September 1993
PDF: 13 pages
Proc. SPIE 1888, Photon Migration and Imaging in Random Media and Tissues, (14 September 1993); doi: 10.1117/12.154640
Show Author Affiliations
Lars Othar Svaasand, Norwegian Institute of Technology (Norway)
Richard Campbell Haskell, Harvey Mudd College (United States)
Bruce J. Tromberg, Beckman Laser Institute and Medical Clinic (United States)
Matthew McAdams, Harvey Mudd College (United States)

Published in SPIE Proceedings Vol. 1888:
Photon Migration and Imaging in Random Media and Tissues
Britton Chance; Robert R. Alfano, Editor(s)

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