Electro-optical alertness monitoring apparatus
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United States of America Patent
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Jul 11, 1989
Grant Date -
N/A
app pub date -
Mar 2, 1988
filing date -
Mar 18, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Apparatus for monitoring the eye of a subject comprising: apparatus for directing infra-red radiation at the eyes of a subject; apparatus for sensing infra-red radiation retroreflected by the retina through the cornea of the subject; and apparatus for providing a sensible output indication in the absence of expected received retroreflected radiation, indicating the closing of the subject's eyes or direction of his eyes outside of a desired angular region.
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