Zoom-lens-barrel assembly

Details Zoom-lens-barrel assembly Zoom-lens-barrel assembly

1990-02-15

1991-02-19

Arnold, Bruce Y.

350255, 35419512, G02B 1500

Patent

active

049938150

ABSTRACT:
A zoom lens-barrel assembly includes a differential cam frame which is moved in an axial direction together with a movable barrel and is rotated around an optical axis. Lens holding frames are cam-linked with the differential cam frame. The positions of the lens holding frames relative to the cam frame are changed by the rotation of the cam frame.

REFERENCES:
patent: 4634221 (1987-01-01), Hopfner
patent: 4729644 (1988-03-01), Ueyama
patent: 4750821 (1988-06-01), Yamamoto et al.
patent: 4834514 (1989-05-01), Atsuta et al.
patent: 4950060 (1990-08-01), Nagasaka

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