Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1988-03-02
1989-07-11
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250235, G01V 904, G06M 700
Patent
active
048474860
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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Gerlitz Yonatan
Moran Dan
Nelms David C.
Oen William L.
Rasaat
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