Wavelength multiplexed waveguide system for eye tracking
US12360371B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 2022 |
| Grant date | Jul 15, 2025 |
| Priority date | — |
| Expiry date | Dec 24, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0187
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An apparatus, system, and method for a waveguide system may be used to support eye tracking in a head mounted display (HMD). The waveguide system may be positioned in a user's field of view and within a lens assembly of the HMD to capture light that is reflected from an eye. The waveguide system may include a waveguide, a first diffraction grating, and a second diffraction grating. The first diffraction grating may be configured to in-couple light of a first wavelength into the waveguide, and the second diffraction grating may be configured to in-couple light of a second wavelength. The first and second diffraction gratings operate together to detect light reflections from an eyebox region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.