Angular selective grating coupler for waveguide display
US10598938B1 · kind B1 · utility
47Cited by
1References
20Claims
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Key dates
| Filing date | Nov 9, 2018 |
| Grant date | Mar 24, 2020 |
| Priority date | — |
| Expiry date | Nov 9, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0178
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical coupler for a waveguide-based display includes a slanted surface-relief grating that includes a plurality of regions. Different regions of the plurality of regions of the slanted surface-relief grating have different angular selectivity characteristics for incident display light. Display light for different viewing angles is diffracted by different regions of the slanted surface-relief grating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.