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:
Sep. 15, 1998
Filed:
Oct. 21, 1996
Applicant:
Inventors:
Gillian Margaret Davis, Cambridge, GB;
Duncan James Anderson, Oxfordshire, GB;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F / ; F21V / ; F21V / ; G01D / ;
U.S. Cl.
CPC ...
349 65 ; 349 98 ; 362 19 ; 362 26 ; 362311 ;
Abstract
An illuminator includes a light guide in the form of a light pipe, one surface of which is provided with a polarization separating layer in the form of an anisotropic layer for separating substantially all of the light of one polarization from the orthogonal polarization component. The anisotropic layer is provided between the light pipe and a reflector. The layer has a first refractive index greater than or equal to that of the light pipe and a second refractive index less than that of the light pipe.