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. 07, 1999
Filed:
Apr. 24, 1997
Kyoji Tamura, Kanagawa-ken, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image pickup apparatus includes an image sensor arranged to photoelectrically convert an image light coming from an object, an iris arranged to adjust the quantity of image light incident on the image sensor, a detection circuit for detecting the state of the iris, a correction circuit to correct the output of the detection circuit so as to correct a change of the iris caused by a change in the mode of shooting, and a focus adjusting device. The correction circuit is arranged such that, when an aperture value is caused to change by a change in the shooting mode, the correction circuit offsets the change of the aperture value by correcting aperture value information before the aperture value information is supplied to the focus adjusting device.