The statistical properties of laser speckle with partially coherent light are related to the scattering characteristics of an optically diffuse material. A diffusion equation model is shown to yield a speckle contrast ratio that agrees well with measurements of opaque plastics of varying thicknesses. We show that partially coherent light can be used to determine material parameters for highly scattering media. Measured data for stratified materials with differing scattering properties indicate that this technique may be useful in detecting inhomogeneities.
© 1997 Optical Society of America
Original Manuscript: August 19, 1996
Revised Manuscript: November 22, 1996
Published: June 1, 1997
Charles A. Thompson, Kevin J. Webb, and Andrew M. Weiner, "Diffusive media characterization with laser speckle," Appl. Opt. 36, 3726-3734 (1997)