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Biomedical Optics Express

Biomedical Optics Express

  • Editor: Joseph A. Izatt
  • Vol. 2, Iss. 4 — Apr. 1, 2011
  • pp: 1021–1029

Correction for spatial averaging in laser speckle contrast analysis

Oliver Thompson, Michael Andrews, and Evan Hirst  »View Author Affiliations

Biomedical Optics Express, Vol. 2, Issue 4, pp. 1021-1029 (2011)

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Practical laser speckle contrast analysis systems face a problem of spatial averaging of speckles, due to the pixel size in the cameras used. Existing practice is to use a system factor in speckle contrast analysis to account for spatial averaging. The linearity of the system factor correction has not previously been confirmed. The problem of spatial averaging is illustrated using computer simulation of time-integrated dynamic speckle, and the linearity of the correction confirmed using both computer simulation and experimental results. The valid linear correction allows various useful compromises in the system design.

© 2011 OSA

OCIS Codes
(030.6140) Coherence and statistical optics : Speckle
(110.6150) Imaging systems : Speckle imaging
(170.0110) Medical optics and biotechnology : Imaging systems
(170.0170) Medical optics and biotechnology : Medical optics and biotechnology

ToC Category:
Optics of Tissue and Turbid Media

Original Manuscript: February 28, 2011
Revised Manuscript: March 22, 2011
Manuscript Accepted: March 25, 2011
Published: March 30, 2011

Virtual Issues
In vivo Microcirculation Imaging (2011) Biomedical Optics Express

Oliver Thompson, Michael Andrews, and Evan Hirst, "Correction for spatial averaging in laser speckle contrast analysis," Biomed. Opt. Express 2, 1021-1029 (2011)

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