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

Dongyel Kang, Tom D. Milster

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

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 (σh > 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.

Original languageEnglish (US)
Pages (from-to)3247-3249
Number of pages3
JournalOptics letters
Volume34
Issue number20
DOIs
StatePublished - Oct 15 2009

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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