Fine adjustment apparatus for optical system lens

Details Fine adjustment apparatus for optical system lens Fine adjustment apparatus for optical system lens

1985-02-21

1987-08-11

Punter, William H.

Electrical generator or motor structure

Dynamoelectric

Rotary

310369, G02B 704, H02L 4104

Patent

active

046857672

ABSTRACT:
A fine adjustment apparatus for an optical system lens includes an annular laminated piezoelectric vibrator. The lens is attached to the inner peripheral portion of the piezoelectric vibrator. The piezoelectric vibrator is firmly supported at its outer peripheral portion by a proper member. The piezoelectric vibrator is deflected by the application of a voltage, whereby the lens is finely displaced in the optical axis direction thereof. The piezoelectric vibrator may be formed by laminating two annular piezoelectric elements with an annular metal plate sandwiched therebetween. Each of the piezoelectric elements has the axis of polarization extending in the thicknesswise direction thereof. The metal plate has a thickness which does not exceed at least 25% of the total thickness of the two piezoelectric elements.

REFERENCES:
patent: 1860529 (1932-05-01), Cady
patent: 2714642 (1955-08-01), Kinsley
patent: 3360664 (1967-12-01), Straube
patent: 3915560 (1975-10-01), Levine et al.
patent: 4123136 (1978-10-01), Dahab et al.
patent: 4303324 (1981-12-01), Marcus
patent: 4383763 (1983-05-01), Hutchings et al.

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