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. 27, 1999
Filed:
Sep. 13, 1996
Ryusaku Takahashi, Yokosuka, JP;
Victor Company of Japan, Ltd., Yokohama, JP;
Abstract
This invention provide an image display apparatus having an illumination optical system for effectively illuminating a plurality of areas on a single common plane uniformly by shortening optical paths of the optical system and a new projection optical system capable of reducing the overall size of the optical system and a production cost thereof. The illumination optical system has an ellipse mirror for collecting light beams generated from a light source, a first lens group for suppressing divergence of the light beams reflected from a light collecting area of the ellipse mirror, a plural color filters for separating the light beams into three color light beams and altering a path of each of the three color light beams, and a second lens group for illuminating objects disposed on the single common plane by focusing the separated three color light beams thereon.