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:
May. 11, 1999
Filed:
Aug. 07, 1998
Applicant:
Inventors:
Maurice E Levis, Hampton, VA (US);
Helen Gourley, San Francisco, CA (US);
Assignee:
Torch Technologies LLC, Hampton, VA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
353122 ; 353 98 ; 385146 ; 359894 ;
Abstract
A projector system includes a light pipe integrator (LPI) between its lamp and its projection lens system. The LPI is hollow, formed from sheet metal, and has an internal cold mirror coating which reflects visible light and passes infra-red radiation. The reflector is a compound reflector having profiles of two ellipses with different eccentricities.