Noise in laser speckle correlation and imaging techniques

Skipetrov, S. E.; Peuser, Joern; Cerbino, Roberto; Zakharov, Pavel; Weber, Bruno; Scheffold, Frank

doi:10.1364/OE.18.014519

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Journal article

Noise in laser speckle correlation and imaging techniques

Skipetrov, S. E. Laboratoire de Physique et Modélisation des Milieux Condensés, Université Joseph Fourier , Grenoble, France
Peuser, Joern Department of Physics, University of Fribourg, Switzerland
Cerbino, Roberto Department of Physics, University of Fribourg, Switzerland - Department of Chemistry, Biochemistry and Medical Biotechnologies, Milano, Italy
Zakharov, Pavel Solianis Monitoring AG, Zurich, Switzerland
Weber, Bruno Institute for Pharmacology and Toxicology, University of Zurich, Switzerland
Scheffold, Frank Department of Physics, University of Fribourg, Switzerland

22.06.2010

Published in:

Optics Express. - 2010, vol. 18, no. 14, p. 14519-14534

English We study the noise of the intensity variance and of the intensity correlation and structure functions measured in light scattering from a random medium in the case when these quantities are obtained by averaging over a finite number N of pixels of a digital camera. We show that the noise scales as 1/N in all cases and that it is sensitive to correlations of signals corresponding to adjacent pixels as well as to the effective time averaging (due to the finite integration time) and spatial averaging (due to the finite pixel size). Our results provide a guide to estimation of noise levels in such applications as multi-speckle dynamic light scattering, time-resolved correlation spectroscopy, speckle visibility spectroscopy, laser speckle imaging etc.

Faculty

Faculté des sciences et de médecine

Department

Département de Physique

Language