Eye tracking for a head mounted display including a pancake lens block
US10429927B1 · kind B1 · utility
13Cited by
1References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 18, 2018 |
| Grant date | Oct 1, 2019 |
| Priority date | — |
| Expiry date | Apr 9, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0138
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A head-mounted display (HMD) includes a pancake lens block, an eye tracking system, and an electronic display. The electronic display is coated with a dichroic film that transmits visible light and reflects infrared light (IR). An IR emitter illuminates an eye of the user, and infrared light is reflected from an eye through the pancake lens block and is incident on the dichroic film. The reflected light undergoes multiple reflections before being captured by an image capturing element of the eye tracking system that is positioned at a periphery of HMD located off-axis relative to an optical axis of the pancake lens block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.