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Applied Optics

Applied Optics


  • Vol. 39, Iss. 24 — Aug. 20, 2000
  • pp: 4411–4417

Equivalent isotropic scattering formulation for transient short-pulse radiative transfer in anisotropic scattering planar media

Zhixiong Guo and Sunil Kumar  »View Author Affiliations

Applied Optics, Vol. 39, Issue 24, pp. 4411-4417 (2000)

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An isotropic scaling formulation is evaluated for transient radiative transfer in a one-dimensional planar slab subject to collimated and/or diffuse irradiation. The Monte Carlo method is used to implement the equivalent scattering and exact simulations of the transient short-pulse radiation transport through forward and backward anisotropic scattering planar media. The scaled equivalent isotropic scattering results are compared with predictions of anisotropic scattering in various problems. It is found that the equivalent isotropic scaling law is not appropriate for backward-scattering media in transient radiative transfer. Even for an optically diffuse medium, the differences in temporal transmittance and reflectance profiles between predictions of backward anisotropic scattering and equivalent isotropic scattering are large. Additionally, for both forward and backward anisotropic scattering media, the transient equivalent isotropic results are strongly affected by the change of photon flight time, owing to the change of flight direction associated with the isotropic scaling technique.

© 2000 Optical Society of America

OCIS Codes
(030.5620) Coherence and statistical optics : Radiative transfer
(110.7050) Imaging systems : Turbid media
(140.7090) Lasers and laser optics : Ultrafast lasers
(290.0290) Scattering : Scattering
(290.4210) Scattering : Multiple scattering

Original Manuscript: October 12, 1999
Revised Manuscript: May 1, 2000
Published: August 20, 2000

Zhixiong Guo and Sunil Kumar, "Equivalent isotropic scattering formulation for transient short-pulse radiative transfer in anisotropic scattering planar media," Appl. Opt. 39, 4411-4417 (2000)

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