Lens barrel having a piezoelectric actuator for moving optical e

Details Lens barrel having a piezoelectric actuator for moving optical e Lens barrel having a piezoelectric actuator for moving optical e

1996-07-23

1997-10-07

Epps, Georgia Y.

Optical: systems and elements

Lens

With support

359814, G02B 702

Patent

active

056754442

ABSTRACT:
The present invention discloses a lens barrel moving an optical system by a linear actuator using a piezoelectric element. The actuator is provided with the constitution whereby a driving member is driven by an extension displacement and a contraction displacement having different velocities caused by applying drive pluses to the piezoelectric element and a driven member frictionally connected to the driving member is linearly moved. The focusing operation is conducted by moving the optical system directly in the optical axis direction by the linear actuator.

REFERENCES:
patent: 4003059 (1977-01-01), Sugiura
patent: 4195243 (1980-03-01), Thaxter
patent: 4303324 (1981-12-01), Marcus
patent: 4601539 (1986-07-01), Watanabe
patent: 4894579 (1990-01-01), Higuchi et al.
patent: 5225941 (1993-07-01), Saito et al.
patent: 5448328 (1995-09-01), Suzuki
patent: 5490015 (1996-02-01), Umeyama

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