Noise in laser speckle correlation and imaging techniques
arXiv:1005.2875 · doi:10.1364/OE.18.014519
Abstract
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 sampling time) and spatial averaging (due to the finite pixel size). Our results provide a guide to estimation of noise level in such applications as the multi-speckle dynamic light scattering, time-resolved correlation spectroscopy, speckle visibility spectroscopy, laser speckle imaging etc.
submitted 14 May 2010
References in corpus (5)
- Speckle-visibility spectroscopy: A tool to study time-varying dynamics
- Multispeckle diffusing-wave spectroscopy: a tool to study slow relaxation and time-dependent dynamics
- Speckle visibility spectroscopy and variable granular fluidization
- Monitoring spatially heterogeneous dynamics in a drying colloidal thin film
- Multiple scattering suppression in dynamic light scattering based on a digital camera detection scheme
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- Observation of Intensity Statistics of Light Transmitted Through 3D Random Media
- Expanding the reach of diffusing wave spectroscopy and tracer bead microrheology