Light coupling system and method
US7434940B2 · kind B2 · utility
11Cited by
8References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 6, 2005 |
| Grant date | Oct 14, 2008 |
| Priority date | — |
| Expiry date | Sep 2, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/29388
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A light coupling system includes a waveguide, configured to receive light from at least two light sources and to internally reflect light therein; a diffraction grating, disposed upon the waveguide; and a switchable Bragg grating, disposed upon the waveguide. The diffraction grating is configured to couple light from at least one of the light sources into the waveguide, and the switchable Bragg grating is configured to selectively couple light out of the waveguide, such that the light from the at least two light sources is selectively directed along a common projection axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.