Abstract

The effect of a large spatial correlation in a scattering medium on the spatial coherence of the scattered field is presented. Theoretical curves are calculated for a specific form of the correlation function of the dielectric susceptibility. It is shown that when the spot size of the incoming coherent light is of the same order as the correlation length of fluctuations a sudden increase in the spatial coherence of the scattered light occurs. The method is applied to the study of the correlation length in a liquid crystal cell under a dc electric field.

© 1976 Optical Society of America

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