Optical waveguides – Directional optical modulation within an optical waveguide – Acousto-optic
Patent
1988-12-28
1991-09-17
LaRoche, Eugene R.
Optical waveguides
Directional optical modulation within an optical waveguide
Acousto-optic
359305, G02B 610
Patent
active
050489364
ABSTRACT:
A light beam deflector employs first and second surface elastic waves to diffract guided waves split from a single light beam introduced into an optical waveguide. The surface elastic waves are generated respectively by first and second tilted-finger chirped interdigital transducers or curved-finger interdigital transducers which are arranged such that the first and second guided waves emittted out of the optical waveguide will scan a surface along respective aligned scanning lines, the ends of which scanning lines are adjacent to each other. The light beam deflector allows a large image to be recorded or read out because it has a wide deflection angle range. The first and second interdigital transducers may alternatively be arranged such that the first and second guided waves emitted out of the optical waveguide will scan the surface without overlapping each other. The light beam deflector may also include third and fourth interdigital transducers for generating third and fourth surface elastic waves for further diffracting the guided waves to provide an even wider deflection angle range.
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Fuji Photo Film Co. , Ltd.
LaRoche Eugene R.
Shingleton M.
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