Display with a waveguide coated with a meta-material
US10871649B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 10, 2017 |
| Grant date | Dec 22, 2020 |
| Priority date | — |
| Expiry date | Oct 1, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2207/101
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An apparatus is disclosed for producing an optical display comprising an optical waveguide including a first diffractive part arranged to receive display light and to diffract the display light into an angle for guided propagation along the optical waveguide. A second diffractive part of the waveguide is optically coupled to the first diffractive part by the optical waveguide and is arranged to receive and to diffract light from the first diffractive part to an angle for output from the optical waveguide. Those external surfaces of the waveguide against which guided light reflects internally are coated with a meta-material having a refractive index of value less than 1.0 (one).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.