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. 26, 2005
Filed:
Nov. 26, 2001
Applicant:
Adrian Robert Leigh Travis, Wrangaton, GB;
Inventor:
Adrian Robert Leigh Travis, Wrangaton, GB;
Assignee:
Cambridge Flat Projection Displays Limited, Fenstanton, GB;
Primary Examiner:
Int. Cl.
CPC ...
G03B021/14 ;
U.S. Cl.
CPC ...
Abstract
An achromatic flat-panel projection display comprises a video projector, a condensing lens () and a tapered transparent slab spreading the image input from the projector over the area of th slab. To compensate for dispersion in the slab a dispersive prism is used at the input edge of the slab, whose dispersion cancels out the dispersion of the slab. The prism can be a separate part of simply a bevel in the input edge, i.e. the thick end of the slab.