Optical chemical sensing device with pyroelectric or...

G - Physics – 01 – N

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G01N 21/17 (2006.01) G01N 25/48 (2006.01) G01N 33/487 (2006.01) G01N 33/53 (2006.01)

Patent

CA 2521773

This invention relates to a device (1) for detecting energy generated by non- radiative decay generated in a substance (2) on irradiation with electromagnetic radiation. The device (1) comprises a radiation source (6) adapted to generate a series of pulses of electromagnetic radiation, a transducer (3) having a pyroelectric or piezoelectric element and electrodes (4, 5) which is capable of transducing the energy generated by the substance (2) into an electrical signal, and a detector (7) which is capable of detecting the electrical signal generated by the transducer (3). The detector (7) is adapted to determine the time delay between each pulse of electromagnetic radiation from the radiation source (6) and the generation of the electric signal. The device (1) has a wide applicability in the fields of assays and monitoring.

L'invention concerne un dispositif (1) permettant de détecter l'énergie produite par décroissance radiative dans une substance (2) irradiée à l'aide d'un rayonnement électromagnétique. Ledit dispositif (1) comprend une source de rayonnement (6) conçue pour produire une série d'impulsions de rayonnement électromagnétique, un transducteur (3) doté d'un élément pyroélectrique ou piézo-électrique et d'électrodes (4, 5) capables de convertir par transduction l'énergie produite par la substance (2) en un signal électrique, et un détecteur (7) capable de détecter le signal électrique produit par le transducteur (3). Le détecteur (7) est conçu pour déterminer le retard temporel entre chaque impulsion de rayonnement électromagnétique provenant de la source de rayonnement(6) et la production du signal électrique. Ce dispositif (1) possède un large champ d'applications dans les dosages et la surveillance.

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