The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 18, 1984
Filed:
Jun. 13, 1983
Applicant:
Inventors:
Assignee:
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354402 ;
Abstract
Disclosed herein is an automatic focusing device of a camera for use with an exchangeable zoom lens which includes an objective adjustable for both focusing and zooming and a signal generator for generating a focal length signal. The automatic focus control device comprises a focus detector for generating a focus detecting signal .DELTA.L representing the amount of and the direction of the deviation (defocusing) of an image relative to a predetermined film plane, a motor driven for focus adjustment of the objective, and an operation circuit for determining the amount of and the direction of the driving of the motor in accordance with the focus detection signal and the focal length signal.