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:
Apr. 22, 2003
Filed:
Jul. 22, 2002
Takao Ogawa, Tokyo, JP;
Nidec Copal Corporation, Tokyo, JP;
Abstract
A reflection preventing treatment is performed with respect to an edge face of a light shielding blade. The blade is composed of a film material made of a polyester, and is formed into a predetermined shape as a base piece. A flat face portion of the blade is capable of shielding an incident light, and an edge face portion is present in perpendicularly crossing to the flat face portion. An inner edge face of an aperture opening is included in this edge face portion. In order to form the blade, at first the base piece is punched from the film material in a predetermined shape. Subsequently, a chemical etching is applied to the edge face portion of the punched base piece so as to roughen the edge face portion. Accordingly, it is possible to suppress an unnecessary reflection of the incident light at the edge face portion. It is possible to evenly and efficiently roughen the inner edge face of the aperture opening by collecting a multiplicity of punched base pieces and dipping them in an etching solution.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile