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. 11, 2010
Filed:
Dec. 12, 2007
Hiroyuki Kobayashi, Matsumoto, JP;
Shohei Fujisawa, Matsumoto, JP;
Yuji Takado, Matsumoto, JP;
Takeshi Takezawa, Matsumoto, JP;
Hiroyuki Kobayashi, Matsumoto, JP;
Shohei Fujisawa, Matsumoto, JP;
Yuji Takado, Matsumoto, JP;
Takeshi Takezawa, Matsumoto, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A light source unit comprising an arc tubehaving a light emitting sectionsealed sections, an oval reflector, and a secondary reflecting mirrorfor covering the front side of the arc tubeand reflecting a luminous flux radiated from the arc tubetoward the oval reflector, the center of discharging emission from the arc tubeis disposed at a first focal position Lof the oval reflector, and the secondary reflecting mirroris configured as a separate member from the arc tube, so that the outer peripheral portion of the secondary reflecting mirroris accommodated within a circular cone shown by boundaries L, Lconnecting a second focal position Lof the oval reflectorand the distal end of the sealed sectionof the arc tubewhen being mounted to the front sealed sectionof the arc tube