Two-coordinate acoustooptic diffraction of limited light beams in paratellurite crystals

The features of acoustooptical diffraction of limited light beams of a rectangular profile on a slow shear ultrasonic wave in paratellurite crystals were investigated. Diffraction efficiency and frequency transmission width of an acoustooptic device in polar plane are shown to be considerably higher than in azimuthal plane. It is established that the resolution of the device in the deflector mode can be the same for the polar and azimuthal planes due to the choice of the size of the input aperture of the light beam.