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Oblique incidence reflectometry: optical-fiber implementation

Wang, Lihong and Lin, Shao-Pow and Jacques, Steven L. and Tittel, Frank K. (1996) Oblique incidence reflectometry: optical-fiber implementation. In: Laser-Tissue Interaction VII. Proceedings of SPIE. No.2681. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, pp. 266-276. ISBN 9780819420558.

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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 on inexpensive equipment, it has potential clinical application to the diagnosis of disease or monitoring of treatments.

Item Type:Book Section
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Wang, Lihong0000-0001-9783-4383
Additional Information:© 1996 Society of Photo-Optical Instrumentation Engineers (SPIE). The project was sponsored in part by The Whitaker Foundation grant, Department of Energy grant, and National Institutes of Health grant.
Funding AgencyGrant Number
Whitaker FoundationUNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
Subject Keywords:Oblique incidence, reflectometry, optical properties, turbid media, biological tissues
Series Name:Proceedings of SPIE
Issue or Number:2681
Record Number:CaltechAUTHORS:20181207-161549146
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Official Citation:Lihong V. Wang, Shao-Pow Lin, Steven L. Jacques, Frank K. Tittel, "Oblique incidence reflectometry: optical-fiber implementation," Proc. SPIE 2681, Laser-Tissue Interaction VII, (7 May 1996); doi: 10.1117/12.239583
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:91617
Deposited By: George Porter
Deposited On:11 Dec 2018 22:51
Last Modified:16 Nov 2021 03:42

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