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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 13, Iss. 10 — May. 16, 2005
  • pp: 3600–3618

Evaluation of photon migration using a two speed model for characterization of packed powder beds and dense particulate suspensions

Tianshu Pan, Sarabjyot Dali, and Eva Sevick-Muraca  »View Author Affiliations


Optics Express, Vol. 13, Issue 10, pp. 3600-3618 (2005)
http://dx.doi.org/10.1364/OPEX.13.003600


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Abstract

A two-speed photon diffusion equation is developed for light propagation in a powder bed of high volume fraction or dense particulate suspension, whereby the light speed is impacted by the refractive index difference between particles and the suspending medium. The equation is validated using Monte Carlo simulation of light propagation coupled with dynamic simulation of particle sedimentation for the non-uniform arrangement of powder particles. Frequency domain experiments at 650 nm for a 77-µm-diameter resin-powder and 50-µm-diameter lactose-powder beds as well as resin-water and lactose-ethanol suspensions confirm the scattering and absorption coefficients derived from the two-speed diffusion equation.

© 2005 Optical Society of America

OCIS Codes
(080.2710) Geometric optics : Inhomogeneous optical media
(170.5280) Medical optics and biotechnology : Photon migration
(290.1990) Scattering : Diffusion
(290.4210) Scattering : Multiple scattering
(290.5850) Scattering : Scattering, particles

ToC Category:
Research Papers

History
Original Manuscript: February 14, 2005
Revised Manuscript: April 29, 2005
Published: May 16, 2005

Citation
Tianshu Pan, Sarabjyot Dali, and Eva Sevick-Muraca, "Evaluation of photon migration using a two speed model for characterization of packed powder beds and dense particulate suspensions," Opt. Express 13, 3600-3618 (2005)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-13-10-3600


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