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:
May. 28, 2013
Filed:
Nov. 06, 2009
Masanobu Ohgane, Yokohama, JP;
Masanobu Ohgane, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An optical element molding die is designed for molding an optical element having a concave-convex structure. The optical element can be manufactured by a wet system that enables element formation over a large area and a curved surface, without using a lithographic process, and is advantageous in terms of mass production and equipment cost. The optical element molding die includes a substrate having a surface with a negative standard electrode potential in the oxidation reaction and an anodic oxidation layer provided on the substrate. A protective layer with the positive standard electrode potential is provided between the substrate and the anodic oxidation layer.