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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 34, Iss. 13 — May. 1, 1995
  • pp: 2362–2366

Use of a laser beam with an oblique angle of incidence to measure the reduced scattering coefficient of a turbid medium

Lihong Wang and Steven L. Jacques  »View Author Affiliations


Applied Optics, Vol. 34, Issue 13, pp. 2362-2366 (1995)
http://dx.doi.org/10.1364/AO.34.002362


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Abstract

A simple and quick approach is used to measure the reduced scattering coefficient (μ s ′) of a semi-infinite turbid medium having a much smaller absorption coefficient than μ s ′. A laser beam with an oblique angle of incidence to the medium causes the center of the diffuse reflectance that is several transport mean-free paths away from the incident point to shift away from the point of incidence by an amount Δx. This amount is used to compute μ s ′ by μ s ′ = sin(α i )/(nΔx), where n is the refractive index of the turbid medium divided by that of the incident medium and α i is the angle of incidence measured from the surface normal. For a turbid medium having an absorption coefficient comparable with μ s ′, a revision to the above formula is made. This method is tested theoretically by Monte Carlo simulations and experimentally by a video reflectometer.

© 1995 Optical Society of America

History
Original Manuscript: April 5, 1994
Revised Manuscript: September 8, 1994
Published: May 1, 1995

Citation
Lihong Wang and Steven L. Jacques, "Use of a laser beam with an oblique angle of incidence to measure the reduced scattering coefficient of a turbid medium," Appl. Opt. 34, 2362-2366 (1995)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-34-13-2362

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