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:
Nov. 16, 2004
Filed:
Sep. 27, 2000
Shinichi Suzuki, Saitama, JP;
PENTAX Corporation, Tokyo, JP;
Abstract
An auto-focusing apparatus includes a light receiving device which separates an image of an object formed via an optical system into two separate images so as to output two sets of image data; a driving device which drives a focusing optical system; an operation device which performs a predetermined operation for determining a phase difference between the two separate images while shifting at least part of one set of image data relative to the other; and a controller which limits a range of shifting of the one set of image data in accordance with an amount of movement of the focusing optical system and a moving direction thereof, when the operation device performs the predetermined operation in accordance with the two sets of image data output from the light receiving device while the driving device drives the focusing optical system along the optical axis.