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:
Feb. 15, 2005
Filed:
Aug. 26, 2003
Kazuya Higuma, Tokyo, JP;
Kazuya Higuma, Tokyo, JP;
Canon Kabushiki Kaisha, , JP;
Abstract
A camera which drives a focusing lens to a target position in a short period of time while maintaining required stop accuracy in accordance with the status of an image-taking optical system, is disclosed. The camera comprises the image-taking optical system and a pulse generator that outputs pulse signals in accordance with movement of the focusing lens. A stop judging unit selectively carries out, in accordance with the status of the image-taking optical system, a first stop judgement of the focusing lens by detecting that the count value of pulse signals has reached a target count value, and a second stop judgement of the focusing lens by detecting that the output signal from the pulse generator does not change.