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Unobtrusive active eye interrogation

  • US 9,039,179 B2
  • Filed: 12/11/2012
  • Issued: 05/26/2015
  • Est. Priority Date: 12/11/2012
  • Status: Active Grant
First Claim
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1. A system for sensing information from an eye of a subject, comprising:

  • a gaze signal sensor adapted for receiving a gaze signal containing information indicative of a gaze direction of the eye of the subject;

    an interrogation signal source for delivering the interrogation signal to the eye of the subject;

    a response signal sensor for sensing a response signal produced by the eye of the subject responsive to the interrogation signal; and

    signal processing circuitry including;

    a gaze signal processor configured to determine the gaze direction of the eye of the subject based upon the gaze signal;

    an alignment detector configured to determine whether the eye of the subject is in alignment with respect to at least one of the interrogation signal source and the response signal sensor based at least in part upon the gaze direction; and

    a response signal processor configured to process the response signal sensed from the eye of the subject by the response signal sensor when the eye of the subject is in alignment with respect to the at least one of the interrogation signal source and the response signal sensor to determine a physiological parameter from the response signal.

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