Artificial reality system having Bragg grating
US11598919B2 · kind B2 · utility
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18Claims
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Key dates
| Filing date | Oct 5, 2020 |
| Grant date | Mar 7, 2023 |
| Priority date | — |
| Expiry date | Feb 16, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2005/1804
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical assembly may include a waveguide and a Bragg grating configured to couple light into or out of the waveguide. The Bragg grating may include a plurality of layer pairs, wherein at least one layer pair comprises a first material having a first refractive index and a second layer having a second refractive index, and wherein properties of the Bragg grating are selected so that the Bragg grating exhibits a substantially similar diffractive efficiency and diffraction angle for light of at least two colors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.