Drive apparatus for zoom lens barrel

Details Drive apparatus for zoom lens barrel Drive apparatus for zoom lens barrel

1997-12-09

1999-08-17

Epps, Georgia

Optical: systems and elements

Lens

With variable magnification

G02B 1514

Patent

active

059402237

ABSTRACT:
A drive apparatus for a zoom lens barrel having at least two movable zooming lens groups which are moved upon zooming, comprising: two lens frames which support the movable zooming lens groups, two cam pins integral with the lens frames and extending in the same direction, two parallel rotatable drive plates which are provided with cam grooves in which the cam pins are fitted, and two drive units which drive the respective drive plates upon zooming. The cam profile of the cam grooves of the drive plates is such that the movable zooming lens groups are moved in predetermined directions by the rotation of the drive plates during zooming.

REFERENCES:
patent: 5113261 (1992-05-01), Morisawa
patent: 5140468 (1992-08-01), Kayanuma
patent: 5266992 (1993-11-01), Takaoka et al.
patent: 5485236 (1996-01-01), Arai et al.

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