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:
Nov. 17, 2009
Filed:
Jan. 08, 2007
Applicants:
Kazuhiro Yamada, Saitama, JP;
Yasuhiro Sakai, Saitama, JP;
Hiroyuki Nakayama, Tokyo, JP;
Maki Yamada, Saitama-ken, JP;
Inventors:
Kazuhiro Yamada, Saitama, JP;
Yasuhiro Sakai, Saitama, JP;
Hiroyuki Nakayama, Tokyo, JP;
Maki Yamada, Saitama-ken, JP;
Assignee:
Hoya Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 1/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical element comprising a lens having a portion with a surface inclination angle of 50° or more within an effective-diameter region, the portion being 10% or more of the effective-diameter region in a projected area, and an anti-reflection coating formed on the lens, the anti-reflection coating having fine roughness with three-dimensional average surface roughness of 5-100 nm on the surface.