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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 4 — Feb. 13, 2012
  • pp: 4726–4737

Speckle size of light scattered from 3D rough objects

Geng Zhang, Zhensen Wu, and Yanhui Li  »View Author Affiliations

Optics Express, Vol. 20, Issue 4, pp. 4726-4737 (2012)

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From scalar Helmholtz integral relation and by coordinate system transformation, this paper begins with a derivation of the far-zone speckle field in the observation plane perpendicular to the scattering direction from an arbitrarily shaped conducting rough object illuminated by a plane wave illumination, followed by the spatial correlation function of the speckle intensity to obtain the speckle size from the objects. Especially, the specific expressions for the speckle sizes of light backscattered from spheres, cylinders and cones are obtained in detail showing that the speckle size along one direction in the observation plane is proportional to the incident wavelength and the distance between the object and the observation plane, and is inverse proportional to the maximal illuminated dimension of the object parallel to the direction. In addition, the shapes of the speckle of the rough objects with different shapes are different. The investigation on the speckle size in this paper will be useful for the statistical properties of speckle from complicated rough objects and the speckle imaging to target detection and identification.

© 2012 OSA

OCIS Codes
(030.6140) Coherence and statistical optics : Speckle
(030.6600) Coherence and statistical optics : Statistical optics
(290.5880) Scattering : Scattering, rough surfaces

ToC Category:
Coherence and Statistical Optics

Original Manuscript: January 3, 2012
Revised Manuscript: February 2, 2012
Manuscript Accepted: February 7, 2012
Published: February 9, 2012

Geng Zhang, Zhensen Wu, and Yanhui Li, "Speckle size of light scattered from 3D rough objects," Opt. Express 20, 4726-4737 (2012)

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