Magnification and focus adjustment control device

Details Magnification and focus adjustment control device Magnification and focus adjustment control device

1996-10-01

1998-03-24

Perkey, W. B.

Photography

Having variable focal length of camera objective

Having focus operation

396 90, 359698, G03B 500, G03B 1334

Patent

active

057322902

ABSTRACT:
A magnification and focus adjustment control device, includes a first lens unit; a second lens unit; and a first and second guiding device for guiding a movement of the second lens unit. While an operation of a magnification change is conducted, a position of the second guiding device relating to the first guiding device is selected to be a lens guiding position where the second lens unit is guided by the first and second guiding devices so that the second lens unit moves along a predetermined locus relating to a movement of the first lens unit. While an operation of a focus adjustment is conducted, the position of the second guiding device relating to the first guiding device is selected to be a guide releasing position where a guidance of the predetermined locus of the second guiding device relating to the first guiding device is released.

REFERENCES:
patent: 4763999 (1988-08-01), Lawther
patent: 4885600 (1989-12-01), Iwasa et al.
patent: 5196963 (1993-03-01), Sato et al.
patent: 5223873 (1993-06-01), Tsuboi
patent: 5267085 (1993-11-01), Sasaki et al.

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