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. 26, 2002
Filed:
Sep. 14, 1998
Keisuke Araki, Yokohama, JP;
Sadahiko Tsuji, Yokohama, JP;
Tsunefumi Tanaka, Yokohama, JP;
Kenichi Kimura, Kawasaki, JP;
Norihiro Nanba, Kawasaki, JP;
Hiroshi Saruwatari, Kawasaki, JP;
Michiharu Aratani, Kawasaki, JP;
Takeshi Akiyama, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An optical element includes an incidence surface, one or more reflecting surfaces reflecting light from the incident surface, an emergence surface, and off-axial curved surfaces causing the light to emerge from the emergence surface. At least one of the incidence surface, the emergence surface and the one or more reflecting surfaces is a surface having diffracting action. The surface having the diffracting action is a curved surface.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile