Blink compensating apparatus and method for objective refractor for the eye
Abstract
Abstract 10. A METHOD OF COMPENSATING FOR A BLINK OCCURING DURING EXAMINATION OF AN EYE BY AN AUTOMATIC INSTRUMENT DIRECTING RADIANT ENERGY INTO SAID EYE, SAID METHOD COMPRISING: (A) PRODUCING A SIGNAL AS A FUNCTION OF RADIANT ENERGY REFLECTED FROM SAID EYE; (B) DETECTING A RATE OF CHANGE OF SAID SIGNAL EXCEEDING A PREDETERMINED THRESHOLD AND REPRESENTING THE BEGINNING OF A BLINK; (C) PRODUCING A BLINK COMMENCEMENT SIGNAL UPON DETECTION OF SAID BLINK; AND (D) USING SAID BLINK COMMENCEMENT SIGNAL TO STOP SAID EXAMINATION OF SAID EYE DURING SAID BLINK. 14. IN AN INSTRUMENT FOR AUTOMATICALLY EXAMINING AN EYE BY DIRECTING RADIATION ENERGY INTO SAID EYE, A BLINK COMPENSATING SYSTEM COMPRISING: (A) MEANS FOR PRODUCING A SIGNAL AS A FUNCTION OF RADANT ENERGY REFLECTED FROM SAID EYE; (B) MEANS FOR DETECTING A RATE OF CHANGE OF SAID SIGNAL EXCEEDING A PREDETERMINED THRESHOLD AND REPRESENTING THE BEGINNING OF A BLINK; (C) MEANS FOR PRODUCING A BLINK COMMENCEMENT SIGNAL UPON DETECTION OF SAID BLINK; AND (D) MEANS RESPONSIVE TO SAID BLINK COMMENCEMENT SIGNAL FOR STOPPING SAID EXAMINATION OF SAID EYE.
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