Oblique incidence reflectometry: optical-fiber implementation

Lihong Wang, Shao pow Lin, Steven L. Jacques, Frank K. Tittel

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

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

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Pages266-276
Number of pages11
Volume2681
DOIs
StatePublished - 1996
Externally publishedYes
EventLaser-Tissue Interaction VII - San Jose, CA, USA
Duration: Jan 29 1996Feb 1 1996

Other

OtherLaser-Tissue Interaction VII
CitySan Jose, CA, USA
Period1/29/962/1/96

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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    Wang, L., Lin, S. P., Jacques, S. L., & Tittel, F. K. (1996). Oblique incidence reflectometry: optical-fiber implementation. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 2681, pp. 266-276) https://doi.org/10.1117/12.239583