Patterned optical filter for eye tracking
US10585477B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 2018 |
| Grant date | Mar 10, 2020 |
| Priority date | — |
| Expiry date | Oct 17, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/10048
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An eyewear device has an optical element, a patterned optical filter, and a camera. The optical element receives light that includes light in a visible band and light in an infrared (IR) band. The patterned optical filter is disposed on the optical element and has a filtering portion and a plurality of non-filtering portions. The filtering portion is transmissive to light in the visible band and filtering of light in the IR band. The non-filtering portions are transmissive to light in the visible band and transmissive to light in the IR band. Some portion of the received light in the IR band passes through the non-filtering portions and illuminates a portion of an eye of a user with a pattern. The camera captures images of the portion of the eye that is illuminated with the pattern.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.