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Relation between the contrast in time integrated dynamic speckle patterns and the power spectral density of their temporal intensity fluctuations
University of Twente.
University of Twente.
Linköping University, Department of Biomedical Engineering, Biomedical Instrumentation. Linköping University, The Institute of Technology.ORCID iD: 0000-0001-6385-6760
University of Twente.
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2010 (English)In: OPTICS EXPRESS, ISSN 1094-4087, Vol. 18, no 21, 21883-21891 p.Article in journal (Refereed) Published
Abstract [en]

Scattering fluid flux can be quantified with coherent light, either from the contrast of speckle patterns, or from the moments of the power spectrum of intensity fluctuations. We present a theory connecting these approaches for the general case of mixed static-dynamic patterns of boiling speckles without prior assumptions regarding the particle dynamics. An expression is derived and tested relating the speckle contrast to the intensity power spectrum. Our theory demonstrates that in speckle contrast the concentration of moving particles dominates over the contribution of speed to the particle flux. Our theory provides a basis for comparison of both approaches when used for studying tissue perfusion.

Place, publisher, year, edition, pages
Optical Society of America (OSA) , 2010. Vol. 18, no 21, 21883-21891 p.
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-62729DOI: 10.1364/OE.18.021883ISI: 000283686500041PubMedID: 20941088OAI: diva2:374240
Available from: 2010-12-03 Created: 2010-12-03 Last updated: 2016-08-31

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Larsson, Marcus
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