Lens position control device for a zoom lens

Details Lens position control device for a zoom lens Lens position control device for a zoom lens

1996-12-30

1998-05-26

Perkey, W. B.

Photography

Having variable focal length of camera objective

Having focus operation

348347, 348351, G03B 1336

Patent

active

057582068

ABSTRACT:
This specification discloses a lens position control device in which the focusing lens of a zoom lens is moved on the basis of the output signal of image pickup means provided on the image plane of the zoom lens to thereby effect focus adjustment and which achieves flange back adjustment in such a manner as to change the reference position of a wobbling lens wobbling back and forth in the direction of an optical axis having a predetermined position as the reference in order to detect the focus state, and the automatization of the flange back adjustment.

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patent: 5091802 (1992-02-01), Imaoka et al.
patent: 5212598 (1993-05-01), Kikuchi
patent: 5352882 (1994-10-01), Koyanagi et al.
patent: 5543840 (1996-08-01), Hirota
patent: 5600372 (1997-02-01), Cha
patent: 5687403 (1997-11-01), Ohtake
patent: 5689738 (1997-11-01), Uziie et al.

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