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. 21, 2009
Filed:
Feb. 06, 2006
Manabu Kobayashi, Saitama, JP;
Manabu Kobayashi, Saitama, JP;
Victor Company of Japan, Ltd., Yokohama, JP;
Abstract
One of preferred embodiments according to the present invention provides a reflection type projection apparatus that includes wire grid polarizers provided respectively for red (R), green (G) and blue (B) light that allow a first polarization component included in R, G, or B light from illumination units to pass therethrough and reflect second polarization components of R, G and B colors that have been produced when reflection type spatial light modulation elements respectively for R, G and B light light-modulate and reflect the first polarization component having once passed through the wire grid polarizers respectively for R, G and B light, the transmission type polarizing plates provided respectively for R, G and B light, and a color combination optical system in this order along a light path, wherein any one of the light reflection surface of at least one of the wire grid polarizers respectively for R, G and B light, the light transmission surface of at least one of the transmission type polarizing plates for R, G and B light, and at least one of the light incident surfaces of the color combination optical system is convexly or concavely shaped in accordance with lateral chromatic aberration of the projection lens, in order to correct for the reduction of lateral chromatic aberration of the image projected on a projection plane.