Optical system for monitoring eye movement
US7347551B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 2004 |
| Grant date | Mar 25, 2008 |
| Priority date | — |
| Expiry date | Sep 19, 2025 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/18
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A system for detecting eye closure through optical observation of the eye includes a frame configured to be worn on a user, a light source, and at least one eyepiece connected to the frame. The eyepiece has a reflective surface on a side facing the user's eye when the frame is positioned on the user and the reflective surface of the eyepiece is configured for reflecting light emitted from the light source onto the eye. A sensor is connected to the frame and is operable to detect light reflected by the eye in a direction that is substantially parallel to the light incident on a retina of the eye to detect that the eye is in an open position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.