An Effective Method of Suppressing the Speckle-noise Using a Cell with the Helix-free Ferroelectric LC

Abstract

We suggest a simple and effective method of suppressing the speckle-noise in the lasergenerated images using the high-speed electro-optical cell with the ferroelectric liquid crystal (FLC), in which the helix is absent (compensated). The nature of deformations of FLC smectic layers in the electric field is indicated, and the mechanism of spatially inhomogeneous phase modulation of the laser beam passing through a cell is considered. The results of destruction of the phase relationships in a laser beam and speckle-noise suppressing are presented in comparison with earlier results, when helix FLC was used.