The autocorrelation function of the backscattered intensity in a diffusing-wave spectroscopy experiment that uses a point source is calculated by use of the diffusive-wave model. We show that in this approximation the calculated autocorrelation function decays faster than if the plane-source approximation were used. The design of a probe that implements this geometry is presented together with preliminary results that show the utility of the probe as a sizing tool in concentrated dispersions.
© 2001 Optical Society of America
(120.5820) Instrumentation, measurement, and metrology : Scattering measurements
(290.1350) Scattering : Backscattering
(290.1990) Scattering : Diffusion
(290.4210) Scattering : Multiple scattering
(290.7050) Scattering : Turbid media
Carlos Rega, Christopher J. Lloyd, David Attwood, David Clarke, and Pauline Geraghty, "Temporal Autocorrelation Function for a Diffusing-Wave Spectroscopy Experiment with a Point Source and Backscattering Detection," Appl. Opt. 40, 4204-4209 (2001)