The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 25, 2014
Filed:
Mar. 09, 2012
Boris I. Gramatikov, Baltimore, MD (US);
David L. Guyton, Baltimore, MD (US);
Kristina Irsch, Baltimore, MD (US);
Boris I. Gramatikov, Baltimore, MD (US);
David L. Guyton, Baltimore, MD (US);
Kristina Irsch, Baltimore, MD (US);
The Johns Hopkins University, Baltimore, MD (US);
Abstract
An apparatus for detecting fixation of at least one eye of a subject on a target includes an optical illumination system, an optical detection system, and a signal processing system adapted to communicate with the optical detection system. The signal processing system is configured to calculate at least one of a time-frequency distribution or an Auto-Regressive spectral estimation of the detection signal to provide a frequency distribution of the detection signal at a plurality of times for use in determining periods in which the subject's eye is fixed on the target based on the first and second frequency signatures.