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:
Aug. 29, 2006
Filed:
Aug. 17, 2004
Ichiro Onuki, Kanagawa, JP;
Eriko Namazue, Tokyo, JP;
Akio Kashiwazaki, Kanagawa, JP;
Osamu Kanome, Kanagawa, JP;
Kohei Watanabe, Tokyo, JP;
Ichiro Onuki, Kanagawa, JP;
Eriko Namazue, Tokyo, JP;
Akio Kashiwazaki, Kanagawa, JP;
Osamu Kanome, Kanagawa, JP;
Kohei Watanabe, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An optical filter is disclosed which adjusts the contours of blurred images and maintains the size of blurred images. The optical filter includes a substrate being substantially transparent and a first layer whose optical density changes continuously, formed on the substrate. A transmission rate of the first layer decreases substantially linearly from a center toward a periphery of the optical filter, and the transmission rate distribution is symmetric with respect to the center.