Zoom lens mechanism and its assembling method

Details Zoom lens mechanism and its assembling method Zoom lens mechanism and its assembling method

1998-02-20

2000-07-18

Epps, Georgia

Optical: systems and elements

Lens

With variable magnification

359699, 359700, G02B 1514

Patent

active

060915528

ABSTRACT:
A zoom lens apparatus in which its dimension in a radial direction of a lens can be reduced. A plurality of flat movable plates which support lens groups at one ends thereof are slidably stacked one over the other on a fixing plate and which are guided straight along an optical axis of the lens by linearly advancing guide pins, projecting from the fixing plate and engaging guide holes formed on the movable plates. One end of an interlocking bar is rotatably mounted on a first movable plate, and an interlocking pin projecting from the other end of the bar engages cam holes of the other movable plates and the fixing plate. As the first movable plate is moved along the optical axis by a piezoelectric linear actuator, the other movable plates are interlockingly moved thereby, and the lens groups are driven for a zooming operation.

REFERENCES:
patent: 5490015 (1996-02-01), Umeyama et al.
patent: 5576894 (1996-11-01), Kuwana
patent: 6002534 (1999-12-01), Ueyama

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