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:
Sep. 11, 2007
Filed:
Mar. 25, 2005
Applicants:
Yasuhiro Matsuo, Kawasaki, JP;
Yoshihiro Ishibe, Utsunomiya, JP;
Kazumi Kimura, Toda, JP;
Kentarou Nomura, Tsuchiura, JP;
Inventors:
Yasuhiro Matsuo, Kawasaki, JP;
Yoshihiro Ishibe, Utsunomiya, JP;
Kazumi Kimura, Toda, JP;
Kentarou Nomura, Tsuchiura, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 5/18 (2006.01);
U.S. Cl.
CPC ...
Abstract
To obtain an optical element capable of obtaining uniform anti reflection characteristics over the whole optical surface having a finite curvature of the optical element, a plurality of convex optical pieces having an anti reflection function are provided on a surface having the finite curvature of the optical element independently along a normal direction of the surface having the finite curvature of the optical element.