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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 12 — Apr. 20, 2011
  • pp: 1697–1706

Finite-difference time-domain and steady-state analysis with novel boundary conditions of optical transport in a three-dimensional scattering medium illuminated by an isotropic point source

Tadatoshi Tanifuji, Shougo Tabata, Kazuya Okimatsu, and Naoya Nishio  »View Author Affiliations


Applied Optics, Vol. 50, Issue 12, pp. 1697-1706 (2011)
http://dx.doi.org/10.1364/AO.50.001697


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Abstract

We evaluate the numerical accuracy of finite-difference time-domain (FDTD) analysis of optical transport in a three-dimensional scattering medium illuminated by an isotropic point source. This analysis employs novel boundary conditions for the diffusion equation. The power radiated from an isotropic point source located at a depth equal to the reciprocal of the reduced scattering coefficient ( 1 / μ s ) below the surface at the irradiated position is introduced to the integral form of the diffusion equation. Finite- difference approximations of the diffusion equation for a surface cell are derived by utilizing new boundary conditions that include an isotropic source even in a surface cell. Steady-state and time-resolved reflectances are calculated by FDTD analysis for a semi-infinite uniform scattering medium illuminated by an isotropic point source. The numerical results agree reasonably with the analytical solutions for μ s = 1 3 mm 1 without resizing the mesh elements.

© 2011 Optical Society of America

OCIS Codes
(170.3660) Medical optics and biotechnology : Light propagation in tissues
(170.6920) Medical optics and biotechnology : Time-resolved imaging
(170.6960) Medical optics and biotechnology : Tomography

ToC Category:
Medical Optics and Biotechnology

History
Original Manuscript: August 11, 2010
Revised Manuscript: November 21, 2010
Manuscript Accepted: January 13, 2011
Published: April 13, 2011

Virtual Issues
Vol. 6, Iss. 5 Virtual Journal for Biomedical Optics

Citation
Tadatoshi Tanifuji, Shougo Tabata, Kazuya Okimatsu, and Naoya Nishio, "Finite-difference time-domain and steady-state analysis with novel boundary conditions of optical transport in a three-dimensional scattering medium illuminated by an isotropic point source," Appl. Opt. 50, 1697-1706 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-12-1697


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