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:
Sep. 14, 2004
Filed:
Jan. 30, 2003
Minolta Co., Ltd., Osaka, JP;
Abstract
A projection optical system has three LCLVs; a first color-separating mirror for separating a substantially polarized light into a first and second color lights and a third color light; a half-wave plate for rotating the polarization direction of either one(s) of the separated light; a second color-separating mirror for synthesizing the first and the third color light, and further, separating the second color light; a first PBS for separating the first and third color lights and illuminating the first and third LCLVs, respectively, and synthesizing image lights from the first and third LCLVs; a second PBS for illuminating the second LCLV and emitting a image light modulated by the second LCLV; a half-wave plate disposed external to output surface of the first PBS; and a third PBS for synthesizing three image lights, the third PBS has a dicroic characteristics and a polarization characteristics.