(under subclass 4) Subject matter wherein proper-ties of an optical waveguiding element which determine the directional modulation are con-trolled by a modulating sonic wave applied to the element.
SEE OR SEARCH CLASS
181, Acoustics, appropriate subclasses for acoustic devices, in general.
359, Optics: Systems (Including Communication) and Elements,
305+, for acousto-optic directional modulation outside of a waveguide.
367, Communications, Electrical: Acoustic Wave System and Devices,
