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:
Oct. 16, 2007
Filed:
Oct. 05, 2004
Yuji Takado, Matsumoto, JP;
Yuji Takado, Matsumoto, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
Aspects of the invention can provide a manufacturing method of a sub-mirror that can readily enhance manufacturing yield. The manufacturing method of a sub-mirror used for a light source lamp provided with an arc tube, an ellipsoidal reflector to reflect lights emitted from the arc tube to be emitted toward an illuminated region, and a sub-mirror having a reflection concave surface to reflect the lights emitted from the arc tube to the ellipsoidal reflector and a through-hole used for attachment to the arc tube. The manufacturing method of a sub-mirror can include a tube-like member preparing step of preparing a tube-like member having an inside diameter dimension matching with an inside diameter dimension of the through-hole, a grinding step of forming a concave surface, though grinding applied from one end face side of the tube-like member, a polishing step of polishing the concave surface formed in the grinding step, and a reflection layer forming step of forming the reflection concave surface by forming a reflection layer within a concave surface polished in the polishing step.