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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Editor: Franco Gori
  • Vol. 27, Iss. 2 — Feb. 1, 2010
  • pp: 151–158

Sizing homogeneous spherical particles from intensity-only angular scatter

Wei Li and Jules S. Jaffe  »View Author Affiliations

JOSA A, Vol. 27, Issue 2, pp. 151-158 (2010)

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A set of algorithms is proposed to retrieve the size of spherically symmetric particles from the measured intensity of angular scatter data. Of special interest are low-contrast particles whose real part of the index of refraction is between 1.03 and 1.09 and whose size k a is constrained so that π k a 16 π , where k = 2 π λ and a is particle radius. Several algorithms are evaluated and compared that are based on either simple matching to the Mie theory predictions or inverse tomography methods. In the tomography methods, a previously proposed algorithm [ Opt. Express. 15, 12217 (2007) ] was used after estimating the phase of the scattered data or adapted to use intensity-only data. In order to ensure stability, all algorithms’ performance was evaluated in the presence of moderate noise. The performance varied as a function of particle size, refractive index, and algorithm. Results suggest that a scattering device that collects only the angular scatter that is perpendicular to the polarization of incident light, usually denoted as S 1 , can be used to accurately estimate the size of homogeneous, low-contrast, spherical particles whose diameters are close to the wavelength of the incident light.

© 2010 Optical Society of America

OCIS Codes
(110.6960) Imaging systems : Tomography
(170.3010) Medical optics and biotechnology : Image reconstruction techniques
(290.3200) Scattering : Inverse scattering
(290.4020) Scattering : Mie theory

ToC Category:

Original Manuscript: July 20, 2009
Revised Manuscript: November 13, 2009
Manuscript Accepted: November 16, 2009
Published: January 11, 2010

Virtual Issues
Vol. 5, Iss. 4 Virtual Journal for Biomedical Optics

Wei Li and Jules S. Jaffe, "Sizing homogeneous spherical particles from intensity-only angular scatter," J. Opt. Soc. Am. A 27, 151-158 (2010)

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