Visual axis detection apparatus

Details Visual axis detection apparatus Visual axis detection apparatus

1992-01-22

1994-01-18

Arnold, Bruce Y.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351200, 351205, A61B 310

Patent

active

052803120

ABSTRACT:
A visual axis detection apparatus in which an eye of an observer is illuminated by a light source, and the corneal reflection image of the eye and the reflected image of the iris are detected by a light sensor. By the utilization of the position information of each reflected image from the sensor, the visual axis of the eye is calculated by a calculator. The light sensor has a plurality of photoelectric elements, and the calculator utilizes the position information of one of a plurality of photoelectric elements which produces the smallest output signal to detect the reflected image of iris on the basis of the signal from the light sensor.

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