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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 45, Iss. 8 — Mar. 10, 2006
  • pp: 1756–1764

Multiple-scattering suppression in dynamic light scattering based on a digital camera detection scheme

Pavel Zakharov, Suresh Bhat, Peter Schurtenberger, and Frank Scheffold  »View Author Affiliations


Applied Optics, Vol. 45, Issue 8, pp. 1756-1764 (2006)
http://dx.doi.org/10.1364/AO.45.001756


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Abstract

We introduce a charge-coupled device (CCD) camera-based detection scheme in dynamic light scattering that provides information on the single-scattered autocorrelation function even for fairly turbid samples. It is based on the single focused laser beam geometry combined with the selective cross-correlation analysis of the scattered light intensity. Using a CCD camera as a multispeckle detector, we show how spatial correlations in the intensity pattern can be linked to single- and multiple-scattering processes. Multiple-scattering suppression is then achieved by an efficient cross-correlation algorithm working in real time with a temporal resolution down to 0.02 s. Our approach allows access to the extensive range of systems that show low-order scattering by selective detection of the singly scattered light. Model experiments on slowly relaxing suspensions of titanium dioxide in glycerol were carried out to establish the validity range of our approach. Successful application of the method is demonstrated up to a scattering coefficient of more than μ s = 5 cm 1 for the sample size of L = 1   cm .

© 2006 Optical Society of America

OCIS Codes
(030.6140) Coherence and statistical optics : Speckle
(040.1520) Detectors : CCD, charge-coupled device
(290.0290) Scattering : Scattering
(290.4210) Scattering : Multiple scattering

ToC Category:
Scattering

History
Original Manuscript: May 18, 2005
Revised Manuscript: July 28, 2005
Manuscript Accepted: July 29, 2005

Virtual Issues
Vol. 1, Iss. 4 Virtual Journal for Biomedical Optics

Citation
Pavel Zakharov, Suresh Bhat, Peter Schurtenberger, and Frank Scheffold, "Multiple-scattering suppression in dynamic light scattering based on a digital camera detection scheme," Appl. Opt. 45, 1756-1764 (2006)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-45-8-1756

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