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The review considers various aspects of the influence of mechanical deformation on the macroscopic structure and optical properties of liquid crystals: type of deformation (compression shear): deformation amplitude; relation between the acoustic wavelength, viscous wavelength, and liquid crystal layer thickness; mutual orientation of the wave vector and director; boundary conditions in the liquid-crystal cell (acoustically soft or acoustically rigid boundary); relation between the linear dimensions of the liquid crystal layer and the acoustic beam; acoustic parameters of the substrates of a liquid-crystal cell (stiffness, charactcriatic impedance, linear dimensions of the substrates vs. the acoustic wavelength). The following physical phenomena responsible for the orientation effects are discussed: acoustic flows, oscillating hydrodynamic flows, sound absorption, interaction between director oscillations and the velocity field. Specific features of acoustooptical phenomena near phase transitions are considered.
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О. А. Капустина (1984) studied this question.
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