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:
Dec. 09, 2014
Filed:
Jan. 13, 2011
Applicants:
Hiroshi Kawauchi, Nagareyama, JP;
Masayuki Yamada, Tokyo, JP;
Takeharu Okuno, Utsunomiya, JP;
Ryo Ogawa, Kawasaki, JP;
Tomonari Nakayama, Yokohama, JP;
Inventors:
Hiroshi Kawauchi, Nagareyama, JP;
Masayuki Yamada, Tokyo, JP;
Takeharu Okuno, Utsunomiya, JP;
Ryo Ogawa, Kawasaki, JP;
Tomonari Nakayama, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 27/00 (2006.01); G02B 1/11 (2006.01); G02B 5/00 (2006.01); B29D 11/00 (2006.01);
U.S. Cl.
CPC ...
G02B 5/003 (2013.01); G02B 1/118 (2013.01); B29D 11/00903 (2013.01);
Abstract
An optical element includes an optically effective area and an optically ineffective area partly or entirely coated with a coating opaque at wavelengths used. The opaque coating contains a cured product prepared from an epoxy resin and a curing agent containing an alicyclic acid anhydride. The alicyclic acid anhydride is preferably methylhexahydrophthalic anhydride or hexahydrophthalic anhydride.