MODULATION OF THE ENERGY COEFFICIENT OF REFLECTION FROM GLASS-FERROELECTRIC SMECTIC-C-ASTERISK INTERFACE IN ELECTRIC-FIELD

Peculiarities have been studied of modulation of nonpolarized light in glass-plane parallel ferroelectric smectic C boundary in the vicinit y of total-internal-reflection angle under the action of electric fiel d. LC materials with optical inclination angle of the local director o f the smectic layer with respect to normal to the layer 45 degrees are discussed. Optical characteristics are studied of modulated light bea m for the cases of one- end two-fold reflection from the boundary. The results of investigations makes it possible to contruct an LC-valve c haracterized byhigh transmission (approximate to 90%) of nonpolarized light in a wide spectrum range in the open state.