Piezoelectric apparatus for producing rotary oscillation of a mi

Details Piezoelectric apparatus for producing rotary oscillation of a mi Piezoelectric apparatus for producing rotary oscillation of a mi

1981-09-04

1984-03-13

Corbin, John K.

350487, G02B 2717, G02F 134

Patent

active

044363648

ABSTRACT:
Piezoelectric light deflecting apparatus consists of first and second piezoceramic strips 11, 12 each of which has a clamped end and a free end 15. The strips 11, 12 are substantially aligned in one plane with their free ends 15 facing one another and spaced apart by a distance x. An AC voltage U having a frequency which differs significantly from the natural resonant frequency of the strips is used to energize the strips to execute oscillations so that their free ends are periodically displaced in counterphase to one another. A mirror 13 is mounted via flexible legs 14 to the free ends of the piezoceramic strips 11, 12 so that the mirror 13 executes a rotary oscillation as a result of the counterphase movements of the free ends of the piezoceramic strips.

REFERENCES:
patent: 2010016 (1935-08-01), French
patent: 3442570 (1969-05-01), Picker
patent: 3758199 (1973-09-01), Thaxter
Lee, "Piezoelectric Bimorph Optical Beam Scanners: Analysis and Construction, " Applied Physics, vol. 18, No. 4, 2/79, pp. 454-459.

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