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:
Jun. 29, 1999
Filed:
Nov. 28, 1995
Margarete Neumann, Penetanguishene, CA;
Raytheon Company, Lexington, MA (US);
Abstract
A liquid crystal projector and color beamsplitter that comprises a single X-cube beamsplitter that transmits both incident and exit light beams. One half of the beamsplitter divides incident white light into three primary colors, and the other half of the beamsplitter combines the primary colors to produce white light that is used for projection. More specifically, the projector comprises a light source for projecting white light, and the color beamsplitter is disposed to receive the white light. The beamsplitter comprises four (right angle) prisms that each comprise a base and two sides, and that are disposed such that the sides of the prisms are adjacent each other. The incident white light is separated by the prisms and coupled along three separate light paths corresponding to red, green and blue light paths. Apparatus such as a plurality of mirrors, or an optical link, for example, are provided for coupling the red, green and blue light back toward the beamsplitter. The red, green and blue light returned toward the beamsplitter is combined by the beamsplitter to produce white light that is transmitted as projected light.