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

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 R_{eb} is reproduced only with an error of 9%. The cylindrical and spheroidal particle models yield slightly improved results for R_{eb} 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

**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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