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:
Dec. 11, 2007
Filed:
Aug. 01, 2002
Jonathan Gerlitz, Petach Tikva, IL;
Jonathan Gerlitz, Petach Tikva, IL;
GlucoVista, LLC, Fairfield, NJ (US);
Abstract
An apparatus for measuring a concentration of a substance in an eye () includes a measurement light source () producing a measurement light beam having a first wavelength at which the substance has a non-zero first absorption coefficient. The apparatus further includes a reference light source () producing a reference light beam having a second wavelength at which the substance has a second absorption coefficient which is substantially equal to zero. At least a portion of the measurement light beam retro-reflects from the retina () and at least a portion of the reference light beam retro-reflects from the retina (). The apparatus further includes a detector () responsive to light having the first wavelength by generating a measurement signal and responsive to light having the second wavelength by generating a reference signal.