Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Direct experimental verification of light transport theory in an optical phantom

Not Accessible

Your library or personal account may give you access

Abstract

Starting from light transport theory, we present an ab initio calculation of the fluence rate that is due to an isotropic point source in an infinite, anisotropically scattering medium. To verify the results experimentally, a latex suspension with uniform particle size, corresponding to g=0.734, was prepared. In the suspension an isotropic light source and an isotropic light detector were placed, and the fluence rate as a function of distance was measured. We observed good agreement in absolute values between the calculated and the observed fluence rate over distances ranging from 1/4 to 8× the total mean free path, which corresponds to a fluence rate varying over some five orders of magnitude. Furthermore, the calculated fluence was obtained from measured values of μs and μa and a calculated phase function without any kind of fitting, and thus the calculation was completely independent from the measurement. This is the first time that the fluence was measured quantitatively with an isotropic probe and found to agree within experimental error with transport theory. The experimental results indicate that, far from the source, the behavior is diffusionlike, even for low albedos, albeit with a corrected effective extinction coefficient.

© 1998 Optical Society of America

Full Article  |  PDF Article
More Like This
Nonlinear effects of localized absorption perturbations on the light distribution in a turbid medium

Harry L. Graber, Raphael Aronson, and Randall L. Barbour
J. Opt. Soc. Am. A 15(4) 834-848 (1998)

Diffusion coefficient in photon diffusion theory

R. Graaff and J. J. Ten Bosch
Opt. Lett. 25(1) 43-45 (2000)

Approximate scalar equations for polarized radiative transfer

G. C. Pomraning and N. J. McCormick
J. Opt. Soc. Am. A 15(7) 1932-1939 (1998)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (7)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (2)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (93)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved