1989-05-30
1990-05-29
Gonzalez, Frank
G02B 610
Patent
active
049290436
ABSTRACT:
A light beam deflector employs first and second surface elastic waves to deflect a guided wave introduced as a light beam and guided in 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 they deflect the guided wave successively and thereby achieve a total deflection angle range which is wide. The light beam deflector may also include third and fourth interdigital transducers for generating third and fourth surface elastic waves for deflecting another guided wave which is split from the light beam. The deflected two light beams emitted from the optical waveguide scan a surface along a common scanning line or along respective independent scanning lines. The light beam deflector further includes an electrooptic light modulator for modulating the guided wave or waves with an image signal at a high speed.
REFERENCES:
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patent: 4425023 (1984-01-01), Matsumoto et al.
patent: 4455064 (1984-06-01), Kenan
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patent: 4735476 (1988-04-01), Heffner et al.
patent: 4815802 (1989-03-01), Nakamura
IEE Transactions on Circuits and Systems, vol. CAS-26, No. 12, C. S. Tsai, "Guided-Wave Acoustooptic Bragg Modulators for Wide-Band Integrated Optic Communications and Signal Processing", Dec. 1979, pp. 1072-1098.
Fuji Photo Film Co. , Ltd.
Gonzalez Frank
Heartney Phan T.
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