Eye tracker control system and method
US6568808B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 25, 2001 |
| Grant date | May 27, 2003 |
| Priority date | — |
| Expiry date | May 30, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2009/0088
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A system and method for controlling an eye movement tracker includes monitoring a plurality of eye positions by following a feature using the tracker. An optical beam is sent into the eye, and an intensity of a reflected beam from the eye is sensed at each position. If the intensity of the reflected beam fluctuates from a predetermined acceptable intensity range, the tracker is returned to a frozen position. The frozen position comprises a most recent position at which the intensity lay within the intensity range. The tracker is also frozen if the noise in the signal exceeds a predetermined acceptable maximum noise level and for counting a number of times the tracker is frozen. The procedure is aborted if the tracker is frozen repeatedly and for a time exceeding a predetermined maximum acceptable time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.