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:
Oct. 15, 2002
Filed:
May. 17, 2000
Jacob Geva, Rishon Le Zion, IL;
Leonid Trachtenberg, Rishon Lezion, IL;
Anatoly Kravetz, Ness Ziona, IL;
Card Guard Scientific Survival Ltd., Rehovot, IL;
Abstract
Disclosed is a method and apparatus for determining the concentration of an interest component in a medium by resonant photoacoustic spectroscopy (RPAS) with a light pulse-train comprising equidistant short pulses having variable duration, frequency, number, and power. The light wavelength is selected so as to be absorbed by the component of interest. Upon irradiation, acoustic oscillations are generated by the absorbed light in a relatively thin layer of the medium, characterized by a heat-diffusing length. The frequency repetition of the light short pulses in the pulse-train is chosen equal to the natural acoustic oscillation frequency of the thin layer of the medium that can be considered as a thin membrane. So, the acoustic oscillation becomes resonant. Measuring of the amplitude and the frequency of the resonant oscillations determine the concentration of interest component. The method and apparatus are suitable monitoring of blood components, especially glucose.