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:
Apr. 20, 1993
Filed:
Mar. 20, 1992
Masamichi Toyama, Tokyo, JP;
Youichi Iwasaki, Kanagawa, JP;
Akihiro Fujiwara, Kanagawa, JP;
Takashi Amikura, Tokyo, JP;
Naoya Kaneda, Kanagawa, JP;
Masahiro Takei, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An automatic follow-up focus detecting device comprises means for shiftably setting a follow-up field; extracting means for extracting a feature of an object in relation to the follow-up field; storing means for storing the extracted feature; detecting means for detecting a relative shift between the object and the device on the basis of the feature of the object extracted by the extracting means and the feature stored by the storing means; and shifting means for shifting a distance measuring field following the object according to the relative shift.