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Applied Optics

Applied Optics


  • Vol. 40, Iss. 24 — Aug. 20, 2001
  • pp: 4210–4214

Scattering optics of foam

Moin U. Vera, Arnaud Saint-Jalmes, and Douglas J. Durian  »View Author Affiliations

Applied Optics, Vol. 40, Issue 24, pp. 4210-4214 (2001)

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The multiple scattering of light by aqueous foams is systematically studied as a function of wavelength, bubble size, and liquid fraction. Results are analyzed in terms of the transport mean free path of the photons and an extrapolation length ratio for the diffuse photon concentration field. The wavelength dependence is minimal and may be attributed entirely to the wavelength dependence of the refractive index of water rather than thin-film interference effects. The transport mean free path is found to be proportional to the bubble diameter and the reciprocal of the square root of liquid fraction. The extrapolation length ratio varies almost linearly with liquid fraction between the values for water–glass–air and air–glass–air interfaces.

© 2001 Optical Society of America

OCIS Codes
(030.5620) Coherence and statistical optics : Radiative transfer
(080.2710) Geometric optics : Inhomogeneous optical media
(170.5280) Medical optics and biotechnology : Photon migration
(170.7050) Medical optics and biotechnology : Turbid media

Original Manuscript: November 3, 2000
Published: August 20, 2001

Moin U. Vera, Arnaud Saint-Jalmes, and Douglas J. Durian, "Scattering optics of foam," Appl. Opt. 40, 4210-4214 (2001)

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