Optical system for multi-view eye-tracking
US11874474B1 · kind B1 · utility
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1References
20Claims
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Key dates
| Filing date | Sep 11, 2020 |
| Grant date | Jan 16, 2024 |
| Priority date | — |
| Expiry date | Nov 18, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/24
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system includes a diffractive optical element including at least one substrate and a grating structure. The grating structure is configured to diffract a first light having an incidence angle within a predetermined range, and the at least one substrate is configured to reflect a second light. The system also includes a polarization selective mechanism configured to generate images based on the first light and the second light, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.