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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 33, Iss. 24 — Dec. 15, 2008
  • pp: 2886–2888

Detrimental effects of speckle-pixel size matching in laser speckle contrast imaging

Sean J. Kirkpatrick, Donald D. Duncan, and Elaine M. Wells-Gray  »View Author Affiliations

Optics Letters, Vol. 33, Issue 24, pp. 2886-2888 (2008)

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Through a series of simulations and experiments, we demonstrate that the frequently cited criterion of matching speckle size to detector element (pixel) size in laser speckle contrast imaging (LSCI) has the detrimental effect of reducing the contrast and thereby decreasing the variation in the laser speckle contrast image. Unlike quasi-elastic light scattering, where this matching condition has been shown to maximize the signal-to-noise ratio, in LSCI, the minimum speckle size must exceed the Nyquist criterion in order to maximize the contrast of the speckle patterns.

© 2008 Optical Society of America

OCIS Codes
(030.0030) Coherence and statistical optics : Coherence and statistical optics
(030.6140) Coherence and statistical optics : Speckle
(110.6150) Imaging systems : Speckle imaging
(120.3890) Instrumentation, measurement, and metrology : Medical optics instrumentation
(120.6150) Instrumentation, measurement, and metrology : Speckle imaging

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: August 21, 2008
Revised Manuscript: October 2, 2008
Manuscript Accepted: October 24, 2008
Published: December 3, 2008

Virtual Issues
Vol. 4, Iss. 2 Virtual Journal for Biomedical Optics

Sean J. Kirkpatrick, Donald D. Duncan, and Elaine M. Wells-Gray, "Detrimental effects of speckle-pixel size matching in laser speckle contrast imaging," Opt. Lett. 33, 2886-2888 (2008)

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