Waveguide grating device
US10156681B2 · kind B2 · utility
71Cited by
880References
20Claims
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Key dates
| Filing date | Nov 8, 2017 |
| Grant date | Dec 18, 2018 |
| Priority date | — |
| Expiry date | Nov 8, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0125
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical waveguide display comprises: a waveguide; a source of light modulated with temporally-varying angularly-distributed information; a fold grating providing a first beam expansion; an input coupler for directing light into total internal reflection paths in a first propagation direction; and an output grating for providing a second beam expansion and extracting light from the waveguide. The input light undergoes at least two diffractions within the fold grating, each diffraction directing light into a unique total internal reflection angular range along a second propagation direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.