Lens barrel

Details Lens barrel Lens barrel

1997-01-09

1997-12-23

Perkey, W. B.

Photography

Having variable focal length of camera objective

Having focus operation

359700, 359701, 359826, G03B 500, G02B 704

Patent

active

057015236

ABSTRACT:
A lens barrel for a zoom lens having front and rear lens groups has a rotary barrel which is rotatable about the optical axis and moves the front lens group in the direction of the optical axis in response to its rotation. A focusing cam groove formed on the inner surface of the rotary barrel guides the rear lens group to focus the zoom lens in response to rotation of the rotary barrel, and a zooming can groove formed on the inner surface of the rotary barrel in parallel to the focusing cam groove guides the rear lens group to zoom the zoom lens in response to rotation of the rotary barrel.

REFERENCES:
patent: 5223873 (1993-06-01), Tsuboi
patent: 5448413 (1995-09-01), Kobayashi et al.

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