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:
Feb. 29, 2000
Filed:
Apr. 24, 1998
Applicant:
Inventor:
Johan Stiens, Brussels, BE;
Assignee:
Rose Research, L.L.C., Dallas, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
385 37 ; 359576 ;
Abstract
For use over a substrate having a substrate refractive index, a diffraction grating for, and method of, converting normally incident light into horizontally propagating light inside the substrate and an optical device employing the diffraction grating or method. In one embodiment, the diffraction grating includes: (1) a first volume of a first material having a first refractive index higher than said substrate refractive index, and (2) a second volume of a second material having a second refractive index lower than the substrate refractive index, the second volume being less than the first volume.