High speed eye tracking device and method
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United States of America Patent
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Jul 4, 1995
Issued Date -
N/A
app pub date -
Aug 17, 1993
filing date -
Jan 30, 1992
priority date (Note) -
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status (Latency Note)
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Abstract
An eye tracking device that utilizes light detection devices for determining the visual axis and point of regard of a user. The light detection devices are arranged in such a way, such as embedded in a thin film, so as to be curved around the optical axis of the eye. In this way, the light detection devices are always coincident with source-emitted light reflected from the fovea. The curved arrangement of light detection devices are mounted onto a head or facial apparatus, which has a mild reflector on its outside surface to keep external light noise at a minimum. Conversion circuitry, such as a pyramid cascade circuit or a microprocessor circuit, determines the position of the fovea-reflected light and computes the visual axis and point of regard of the user at a very rapid rate.
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