Optical device having reduced diffraction artifacts for eye-tracking
US11150468B1 · kind B1 · utility
2Cited by
9References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2019 |
| Grant date | Oct 19, 2021 |
| Priority date | — |
| Expiry date | Jan 6, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2260/51
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical device and an eye-tracking system to suppress a rainbow effect are provided. The optical device includes a grating. The grating includes at least one substrate and a grating structure coupled to the at least one substrate. The grating structure is configured to diffract an infrared light beam and transmit a visible light beam with a diffraction efficiency less than a predetermined threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.