Optical eye-control apparatus
US5610681A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1996 |
| Grant date | Mar 11, 1997 |
| Priority date | — |
| Expiry date | Aug 5, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2213/025
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An apparatus having an irradiation device for irradiating the eye of an observer; a sensor having a number of pixels with a set pitch; an image forming optical unit for imaging light reflected by the eye onto the sensor; and an electronic circuit for making a signal denoting the direction of the line of sight of the eye in accordance with an output from the sensor, wherein the relationship expressed by Pitch X/.beta.<0.41 mm is satisfied when an assumption is made that the image forming magnification of the image forming unit is .beta. and the pitch of the pixels of the sensor is Pitch X so that accuracy in detecting the line of sight of the eye is improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.