Optical combiner with uniform illuminance throughput
US12204136B2 · kind B2 · utility
0Cited by
1References
16Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 2, 2022 |
| Grant date | Jan 21, 2025 |
| Priority date | — |
| Expiry date | Jan 25, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2260/51
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A device includes a display configured to generate an image light. The device also includes a waveguide optically coupled with the display and configured to guide the image light to an exit pupil of the device. The waveguide includes a grating including a birefringent material, and a birefringence of the grating is configured to increase along a pupil-expanding direction of the device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.