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:
Jan. 31, 2012
Filed:
Jan. 24, 2008
Atsushi Kanayama, Saitama, JP;
Atsushi Kanayama, Saitama, JP;
Fujinon Corporation, Saitama-Shi, JP;
Abstract
A taking lensof an automatic focusing system of an optical path length difference type is configured so that AF object light is branched from a main optical path that guides object light to a video imaging deviceof a camera main body, and object images are formed on AF imaging devicesA andB. A ⅔ type CCD is used as the video imaging device, and a ⅓ type CCD, that is easily available and cheap, is used as the AF imaging devicesA andB. In view of that sizes of the AF imaging devicesA andB are smaller than that of the video imaging device, the object images formed on the AF imaging devicesA andB are reduced by a reduction optical system