G - Physics – 01 – J
Patent
G - Physics
01
J
G01J 3/02 (2006.01) G01J 3/28 (2006.01) G01J 3/457 (2006.01) G01J 3/51 (2006.01)
Patent
CA 2240185
The present invention provides a programmable filter for use as a standard in correlation spectrometers. Also provided is the use of the programmable standard in a process for determining the concentration of an optically absorbing compound. Also provided is a method and apparatus for noninvasively determining the concentration of an optically absorbing biological sample which incorporates the programmable standard of the invention. In one embodiment the programmable standard (20) contains a dispersive element (106a) and a transmissive spatial light modulator (108). Because the position of each light beam correlates to its wavelength, spatial filter (108) controllably and selectively attenuates desired wavelengths of the input beam.
L'invention concerne un filtre programmable, destiné à être utilisé comme étalon dans les spectromètres de corrélation. L'invention concerne également l'utilisation d'un étalon programmable pour un procédé de détermination de la concentration d'un composé optiquement absorbant. L'invention concerne également un procédé et un appareil de détermination non invasive de la concentration d'un échantillon biologique optiquement absorbant, faisant appel à l'étalon programmable de l'invention. Dans une forme d'exécution, l'étalon programmable (20) contient un élément dispersif (106a) et un modulateur de lumière spatial transmissif (108). Comme il y a une corrélation entre la position de chaque faisceau de lumière et sa longueur d'onde, le filtre spatial (108) atténue, de manière contrôlable et sélective, les longueurs d'ondes souhaitées du faisceau incident.
Heinz Robert E.
Lindberg John M.
Abbott Laboratories
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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