Camera with device for detecting line of sight
US5491532A · kind A · utility
2Cited by
4References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1994 |
| Grant date | Feb 13, 1996 |
| Priority date | — |
| Expiry date | Sep 19, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2213/025
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A camera with a device for detecting the line of sight is provided with a first light source for detecting the corneal reflected image of the eye and a second light source for detecting the boundary between the pupil and the iris or between the iris and the white of the eye, thereby effecting illuminations for these purposes with optimum illumination intensities. Thus the position of the Purkinje's first image and the central position of the pupil can be detected efficiently, and the direction of the line of sight can be accurately calculated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.