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Proceedings Paper

Oblique-incidence reflectometry: one relative profile measurement of diffuse reflectance yields two optical parameters
Author(s): Lihong V. Wang; Shao-Pow Lin; Steven L. Jacques; Frank K. Tittel; Jennifer Harder; John Jancarik; Beth Michelle Mammini; Ward Small; Luiz Barroca Da Silva
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Paper Abstract

A new, simple and quick approach, oblique-incidence reflectometry, was used to measure the absorption and reduced scattering coefficients of a semi-infinite turbid medium. An obliquely incident light beam causes the center of the far diffuse reflectance to shift from the point of incidence, where the far diffuse reflectance refers to the diffuse reflectance that is several transport mean free paths away from the incident point. The amount of shift yields the diffusion constant by a simple formula, and the slope of the diffuse reflectance yields the attenuation coefficient. Only the relative profile of the diffuse reflectance is needed to deduce both optical parameters, which makes this method attractive in clinical settings because it does not require a stringent calibration for absolute quantity measurements. This method was tested theoretically by Monte Carlo simulations and experimentally by a reflectometer. Because this method can be used to measure optical properties of biological tissues quickly and requires only inexpensive equipment, it has potential clinical application to the diagnosis of disease or monitoring of treatments.

Paper Details

Date Published: 27 December 1995
PDF: 11 pages
Proc. SPIE 2627, Optical Biopsies, (27 December 1995); doi: 10.1117/12.228887
Show Author Affiliations
Lihong V. Wang, Univ. of Texas (United States)
Shao-Pow Lin, Univ. of Texas (United States)
Steven L. Jacques, Univ. of Texas (United States)
Frank K. Tittel, Rice Univ. (United States)
Jennifer Harder, Lawrence Livermore National Lab. (United States)
John Jancarik, Lawrence Livermore National Lab. (United States)
Beth Michelle Mammini, Lawrence Livermore National Lab. (United States)
Ward Small, Lawrence Livermore National Lab. (United States)
Luiz Barroca Da Silva, Lawrence Livermore National Lab. (United States)

Published in SPIE Proceedings Vol. 2627:
Optical Biopsies
Rinaldo Cubeddu; Serge R. Mordon; Katarina Svanberg, Editor(s)

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