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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 19, Iss. 3 — Mar. 1, 2002
  • pp: 521–531

Can simple particle shapes be used to model scalar optical properties of an ensemble of wavelength-sized particles with complex shapes?

F. Michael Kahnert, Jakob J. Stamnes, and Knut Stamnes  »View Author Affiliations


JOSA A, Vol. 19, Issue 3, pp. 521-531 (2002)
http://dx.doi.org/10.1364/JOSAA.19.000521


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Abstract

We compute the scalar optical properties of size–shape distributions of wavelength-sized randomly oriented homogeneous particles with different nonaxially symmetric geometries and investigate how well they can be modeled with a simple spherical, spheroidal, or cylindrical particle model. We find that a spherical particle model can be used to determine the extinction and scattering cross sections, the single-scattering albedo, and the asymmetry parameter with an error of less than 2%, whereas the extinction-to-backscatter ratio Reb is reproduced only with an error of 9%. The cylindrical and spheroidal particle models yield slightly improved results for Reb that deviate from those obtained for the complex particle ensemble by 7% and 5%, respectively. Large discrepancies between results of the different models are observed for the linear depolarization ratio, thus indicating limitations of models based on simple particle shapes.

© 2002 Optical Society of America

OCIS Codes
(010.4450) Atmospheric and oceanic optics : Oceanic optics
(290.1310) Scattering : Atmospheric scattering
(290.5850) Scattering : Scattering, particles

History
Original Manuscript: May 16, 2001
Revised Manuscript: July 24, 2001
Manuscript Accepted: July 27, 2001
Published: March 1, 2002

Citation
F. Michael Kahnert, Jakob J. Stamnes, and Knut Stamnes, "Can simple particle shapes be used to model scalar optical properties of an ensemble of wavelength-sized particles with complex shapes?," J. Opt. Soc. Am. A 19, 521-531 (2002)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-19-3-521

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