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:
Nov. 03, 1998
Filed:
Mar. 31, 1997
Applicant:
Inventors:
Maurice E Levis, Hampton, VA (US);
Helen Gourley, San Francisco, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
353122 ; 353 98 ; 359894 ; 385146 ;
Abstract
A projector system includes a lamp, a reflector collector optic, relay optics to image the light from the light pipe exit pupil to the image gate, a light pipe and an image forming means such as a film gate or an LCD (Liquid Crystal Display) panel. The light pipe has a round or octagonal entrance pupil, reflecting internal walls, is tapered in shape, and has a rectangular exit pupil which is larger than a center section in cross-section. The light pipe mixes the light, by internal reflection, and produces light which is uniform in color and intensity across the exit pupil.