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:
Jan. 08, 2002
Filed:
Feb. 23, 2001
Tsukasa Uehara, Kawasaki, JP;
Makoto Sekita, Yokohama, JP;
Kenji Kawano, Tokyo, JP;
Seiji Iida, Machida, JP;
Canon Kabushiki Kaisha, , JP;
Abstract
In an optical element (B ) prepared by integrally forming, on surfaces of a transparent member, a refracting surface (R ) for receiving a light beam, a plurality of reflecting surfaces (R R R ) with curvatures, and a refracting surface (R ) for outputting the light beam reflected by the plurality of reflecting surfaces, a reference portion ( ) for defining the position of the optical element in a predetermined direction with respect to a Y′-Z′ plane including an incident reference axis ( ) and an exit reference axis ( ) of at least one reflecting surface of the optical element (B ) is formed on the optical element.