Virtual and augmented reality systems and methods having improved diffractive grating structures
US10466486B2 · kind B2 · utility
7Cited by
11References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 14, 2018 |
| Grant date | Nov 5, 2019 |
| Priority date | — |
| Expiry date | Feb 14, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0174
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed is an improved diffraction structure for 3D display systems. The improved diffraction structure includes an intermediate layer that resides between a waveguide substrate and a top grating surface. The top grating surface comprises a first material that corresponds to a first refractive index value, the underlayer comprises a second material that corresponds to a second refractive index value, and the substrate comprises a third material that corresponds to a third refractive index value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.