Piezoelectric optical beam deflector

Details Piezoelectric optical beam deflector Piezoelectric optical beam deflector

1985-11-14

1987-09-01

Goldberg, E. A.

Recorders

Printing, dotting, or punching marker

Ink transfer support or moving means

346160, 358296, G01D 942, G01D 1514, H04N 121

Patent

active

046912126

ABSTRACT:
A piezoelectric bimorph scanner is disclosed which has a flexural beam attached to the free end of a cantilever mounted piezoelectric bimorph crystal. A mirror is bonded to the flexural beam a predetermined distance from the bimorph crystal. An AC voltage of predetermined frequency is applied to the bimorph crystal causing the flexural beam to oscillate with a node at the center of the mirror. The mirror rotates about the node rather than swinging in an arc, enabling the scanner to deflect a collimated light beam over a larger deflection angle than heretofore possible without additional light beam control apparatus. In an alternate embodiment, a laser diode may be mounted on the flexural beam instead of the mirror, further reducing costs and components.

REFERENCES:
patent: 3614677 (1971-10-01), Wilfinger
patent: 3836225 (1974-09-01), Wilde et al.
patent: 3981566 (1976-09-01), Frank et al.
patent: 4385798 (1983-05-01), Yevick
patent: 4436364 (1984-03-01), Lauer et al.
patent: 4520370 (1985-05-01), Fuji et al.
Marinace, Electrical Positioning of Lenses, IBM Tech. Disc. Bull., vol. 19, No. 5, p. 1948, Oct. '76.
J. F. Stephany et al; "Bimorph Optical Beam Deflector"; Applied Optics; vol. 15, No. 2, Feb. 1976, pp. 307-308.

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