Annular piezoelectric plastic bender lens motor

Details Annular piezoelectric plastic bender lens motor Annular piezoelectric plastic bender lens motor

1980-10-06

1981-12-01

Griffin, Donald A.

350255, 354 25, G03B 708, G03B 1302, G02B 702

Patent

active

043033245

ABSTRACT:
A motor for moving a lens element in a photographic camera comprises an annular bender of piezoelectric plastic material such as polyvinylidene fluoride (PVF.sub.2). The outside edge of the annular bender is rigidly fixed to the camera, and the movable lens element is flexibly supported inside the annulus. The bender is mounted in the camera such that deflection of the bender produced by a moderately high voltage displaces the lens element along the optical axis of the camera.

REFERENCES:
patent: 4021101 (1977-05-01), Camerik
patent: 4083057 (1978-04-01), Quinn
patent: 4152060 (1979-05-01), Specht
patent: 4156565 (1979-05-01), Harrison
patent: 4234245 (1980-11-01), Toda et al.
"A Piezoelectric Fine-Focusing Optical Mount" by Marshall D. Graham, Review of Scientific Instruments, vol. 45, No. 8, Aug. 1974, pp. 1026-1027.

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