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. 10, 2006
Filed:
Feb. 26, 2002
Hisashi Iechika, Shiojiri, JP;
Takeshi Takizawa, Shiojiri, JP;
Hisashi Iechika, Shiojiri, JP;
Takeshi Takizawa, Shiojiri, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
The present invention provides a technique for readily changing the design of a projector. A projector comprises: an illumination optical system; a light modulation device; a projection optical system; and a base frame for mounting a plurality of optical components disposed on a light path from the optical illumination system to the projection optical system. The illumination optical systemcomprises: a light sourcea lens arrayand a superimposing lens systemThe base frame includes a positioning section for positioning the superimposing lens systemThe superimposing lens systemincludes at least two lensesandThe first lensis provided at a position nearest to the light source and mainly determines an F-number of the illumination optical system. The second lensis provided at a position furthest from the light source and mainly determines a magnification of the illumination optical system.