Optical eye-control apparatus

Details Optical eye-control apparatus Optical eye-control apparatus

1996-08-05

1997-03-11

Perkey, W. B.

Photography

Eye tracking

G03B 1302

Patent

active

056106815

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.

REFERENCES:
patent: 4559446 (1985-12-01), Suzuki
patent: 5109154 (1992-04-01), Higashihara et al.
patent: 5225862 (1993-07-01), Nagano et al.
patent: 5327191 (1994-07-01), Shindo et al.
patent: 5486892 (1996-01-01), Suzuki et al.

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