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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 34, Iss. 20 — Oct. 15, 2009
  • pp: 3247–3249

Effect of fractal rough-surface Hurst exponent on speckle in imaging systems

Dongyel Kang and Tom D. Milster  »View Author Affiliations


Optics Letters, Vol. 34, Issue 20, pp. 3247-3249 (2009)
http://dx.doi.org/10.1364/OL.34.003247


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Abstract

Speckle image contrasts from a fractal rough-surface object are investigated in simulation, where the image surface is conjugate to the object surface. It is observed that the Hurst exponent H of fractal roughness affects speckle contrast and statistics dramatically. For example, a strong rough surface ( σ h > λ ) exhibits Rayleigh statistics over increasing ranges of point spread function widths as H decreases. Conceptual explanations are also presented for effects of H and the coherence factor on speckle in imaging systems.

© 2009 Optical Society of America

OCIS Codes
(030.6140) Coherence and statistical optics : Speckle
(110.1650) Imaging systems : Coherence imaging
(110.6150) Imaging systems : Speckle imaging

ToC Category:
Image Processing

History
Original Manuscript: April 8, 2009
Revised Manuscript: September 11, 2009
Manuscript Accepted: September 11, 2009
Published: October 15, 2009

Citation
Dongyel Kang and Tom D. Milster, "Effect of fractal rough-surface Hurst exponent on speckle in imaging systems," Opt. Lett. 34, 3247-3249 (2009)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-34-20-3247


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