Optical waveguides – Planar optical waveguide
Patent
1997-07-30
1998-12-01
Ullah, Akm E.
Optical waveguides
Planar optical waveguide
349 65, 349 57, 362 19, 362 26, 362 31, 385147, G02B 610
Patent
active
058450351
ABSTRACT:
The invention relates to an illumination system comprising an optical waveguide of an optically transparent material having an exit surface and a plurality of end faces, and a light source whose light is coupled into the waveguide via at least one end face of the waveguide. The waveguide further comprises polarizing means for polarizing the light emitted by the light source. The waveguide comprises at least two layers, of which one layer comprises an optically anisotropic material having refractive indices n.sub.e and n.sub.o and the other layer comprises an optically isotropic material having a refractive index n.sub.i, in which one of the refractive indices n.sub.e or n.sub.o is equal to n.sub.i. For the refractive indices, n.sub.e or n.sub.o should be equal or substantially equal to n.sub.i in order that polarization separation occurs at the interface between the isotropic and the anisotropic material. The invention also relates to a flat-panel picture display device including such an illumination system.
REFERENCES:
patent: 4212048 (1980-07-01), Castleberry
patent: 4985809 (1991-01-01), Matsui
patent: 5729311 (1998-03-01), Broer et al.
Fox John C.
U.S. Philips Corporation
Ullah Akm E.
LandOfFree
Illumination system for a flat-panel picture display device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Illumination system for a flat-panel picture display device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Illumination system for a flat-panel picture display device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2401782