Patents Assigned to Université de Limoges
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Patent number: 8149180Abstract: The invention relates to an antenna for transmitting or receiving electromagnetic waves at a working frequency fT, that comprises a resonator with a filtering (49) coating that covers the major portion of the upper face of a reflector (22) located inside a cavity (36), the coating (40) being capable of removing all the electromagnetic waves having a frequency fT, and propagating in a direction parallel to the upper face of the reflector, without removing all the electromagnetic waves having a frequency fT and propagating in a direction perpendicular to the upper face of the reflector.Type: GrantFiled: March 13, 2008Date of Patent: April 3, 2012Assignees: Centre National de la Recherche Scientifique (C.N.R.S.), Centre National d'Etudes Spatiales, Universite de LimogesInventors: Marc Thevenot, Bernard Jecko, Thierry Monediere, Regis Chantalat, Cyrille Menudier, Patrick Dumon
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Publication number: 20120038916Abstract: A method and device is provided for characterizing microscopic elements. A source signal may be chopped by means of microsystems of opto-electromechanical elements (MOEMS), which gives rise to temporal modulation of the excitation signals. The method of characterizing microscopic elements involves propagating a dispersed light source signal, spatially chopping the spectrum of the source signal into at least two excitation signals having predetermined wavelengths ?i, coding the excitation signals, focusing the excitation signals in order to generate a sensor signal propagated towards a measurement zone, and analyzing an interaction signal issuing from the interaction of the sensor signal with the microscopic elements situated in the measuring space. The spatial chopping of the spectrum of the source light signal is performed by a microsystem of opto-electromechanical elements (MOEMS).Type: ApplicationFiled: April 1, 2011Publication date: February 16, 2012Applicants: C.N.R.S. Centre National de la Recherche Scientifique, Universite de LimogesInventors: Vincent Couderc, Philippe LeProux, Laurent LeFort, David Bouyge, Christelle Lesvigne-Buy, Aurelian Crunteanu Stanescu
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Publication number: 20110291492Abstract: The present disclosure relates to a high-voltage pulse generator including a “frozen-wave” generation system for generating high-voltage pulses and a trigger system for triggering the pulses, the generation system including a first and a second photoconductor element, wherein the triggering system includes means for generating a laser light beam and means for splitting the laser beam into two laser beam fractions, each laser beam fraction being directed onto a photoconductor element of the generation system, the splitting means being capable of controlling the distribution of the respective powers of the two laser beam fractions as a function of the orientation of the polarization of the laser beam. The present disclosure also relates to a facility comprising multiple high-voltage pulse generators and electrooptic pump-probe equipment operating such a high-voltage pulse generator.Type: ApplicationFiled: April 10, 2009Publication date: December 1, 2011Applicants: UNIVERSITE DE LIMOGES, INSTITUT FRANCO-ALLEMAND DE RECHERCHES DE SAINT-LOUIS, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE - CNRSInventors: Vincent Couderc, Bertrand Vergne, Philippe Leveque
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Publication number: 20110199609Abstract: A method and device is provided for characterizing microscopic elements. A source signal may be chopped by means of microsystems of opto-electromechanical elements (MOEMS), which gives rise to temporal modulation of the excitation signals. The method of characterizing microscopic elements involves propagating a dispersed light source signal, spatially chopping the spectrum of the source signal into at least two excitation signals having predetermined wavelengths ?i, coding the excitation signals, focusing the excitation signals in order to generate a sensor signal propagated towards a measurement zone, and analyzing an interaction signal issuing from the interaction of the sensor signal with the microscopic elements situated in the measuring space. The spatial chopping of the spectrum of the source light signal is performed by a microsystem of opto-electromechanical elements (MOEMS).Type: ApplicationFiled: October 10, 2008Publication date: August 18, 2011Applicant: UNIVERSITE DE LIMOGESInventors: Vincent Couderc, Philippe LeProux, Laurent LeFort, David Bouyge, Christelle Lesvigne-Buy, Aurelian Crunteanu Stanescu
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Publication number: 20110097259Abstract: The invention relates to an architecture comprising ceramic or metallic foam, characterized in that the foam has at least one continuous and/or discontinuous, axial and/or radial porosity gradient ranging from 10 to 90%, and a pore size from 2 ppi to 60 ppi, and in that the architecture has a micro structure comprising specific area ranging between 0.1 to 30 m2/g, a grain size between 100 nm and 20 microns and a skeleton densification above 95%. One process to obtain this architecture can be based on the preparation of a ceramic foam with porosity gradient comprising: choosing at least one polymeric sponge, impregnation of the polymeric sponge by a ceramic slurry, drying of the impregnated sponge, pyrolysing the organics including the polymeric sponge, and sintering, and characterized in that we realize a pre-step to obtain a continuous and/or discontinuous porosity gradient.Type: ApplicationFiled: May 13, 2009Publication date: April 28, 2011Applicants: L'AIR LIQUIDE SOCIETE ANONYME POUR L'EXPLOITATION, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, UNIVERSITE DE LIMOGESInventors: Pascal Del-Gallo, Mathieu Cornillac, Fabrice Rossignol, Raphael Faure, Thierry Chartier, Daniel Gary
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Publication number: 20100321261Abstract: The invention relates to an antenna for transmitting or receiving electromagnetic waves at a working frequency f?, that comprises a resonator with a filtering (49) coating that covers the major portion of the upper face of a reflector (22) located inside a cavity (36), the coating (40) being capable of removing all the electromagnetic waves having a frequency f? and propagating in a direction parallel to the upper face of the reflector, without removing all the electromagnetic waves having a frequency f? and propagating in a direction perpendicular to the upper face of the reflector.Type: ApplicationFiled: March 13, 2008Publication date: December 23, 2010Applicants: CENTRE NATIONAL D'ETUDES SPATIALES, UNIVERSITE DE LIMOGESInventors: Marc Thevenot, Bernard Jecko, Thierry Monediere, Regis Chantalat, Cyrille Menudier, Patrick Dumon
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Publication number: 20100309936Abstract: The invention relates to a passively triggered microchip laser (1) formed by a cavity closed by an input mirror (4) and an output mirror (5), characterised in that the cavity includes deflection means (9, 10, 11, 12, 13) designed to deflect a light beam (14) between the input mirror (4) and the output mirror (5).Type: ApplicationFiled: May 14, 2008Publication date: December 9, 2010Applicants: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE-CNRS, UNIVERSITE DE LIMOGES, HORUS LASERInventors: Laurent Lefort, Paul-Henri Pioger, Vincent Couderc
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Patent number: 7800817Abstract: A device for producing a polychromatic light including an optical pump that delivers a first radiation at a first wavelength; a light guide; and a selective injector that injects the radiation into the guide, the guide being arranged to generate a harmonic corresponding to the selected injector and provide a polychromatic light at an outlet, by non-linear excitation of the first radiation and the harmonic.Type: GrantFiled: April 14, 2006Date of Patent: September 21, 2010Assignees: Centre National de la Recherche Scientifique-CNRS, Universite de LimogesInventors: Vincent Couderc, Philippe Leproux, Vincent Tombelaine, Pierre-Alain Champert, Sébastien Février, Alain Barthélémy, Jean-Louis Auguste, Jean-Marc Blondy
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Patent number: 7768691Abstract: A dedicated polychromatic light generating device including optical pumping devices used to deliver radiation with at least two different excitation wavelengths and a light-guiding device used to deliver polychromatic light at an output when excited by the radiation in a non-linear interaction regime.Type: GrantFiled: March 8, 2005Date of Patent: August 3, 2010Assignees: Horiba ABX SAS, Universite de Limoges, Centre National de la Recherche Scientifique CNRSInventors: Philippe Nerin, Pierre-Alain Champert, Sébastien Fevrier, Philippe Roy, Vincent Couderc, Philippe Leproux, Ludovic Grossard
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Patent number: 7605632Abstract: A high power electric pulse generator includes a charge storage device, a high voltage source for charging the charge storage device, a first photoconductor element connected to the reference potential and to the storage device, a second photoconductor element connected to the storage device and to a useful load, a first light source for delivering a pulse of light to the first photoconductor, a second light source for delivering a pulse of light to the second photoconductor and a synchronization device for synchronizing the emission delay between the first light source and the second light source. The first photoconductor and the second photoconductor are passive semiconductor elements with a linear regime forming photosensitive switches, with the first and second photoconductors being doped silicon photoconductors.Type: GrantFiled: June 30, 2008Date of Patent: October 20, 2009Assignees: CNRS (Centre National de la Recherche Scientifique), Universite de LimogesInventors: Vincent Couderc, Bertrand Vergne, Alain Barthelemy, Dominique Gontier, Patrick Brunel
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Publication number: 20090213614Abstract: A device for producing a polychromatic light including an optical pump that delivers a first radiation at a first wavelength; a light guide; and a selective injector that injects the radiation into the guide, the guide being arranged to generate a harmonic corresponding to the selected injector and provide a polychromatic light at an outlet, by non-linear excitation of the first radiation and the harmonic.Type: ApplicationFiled: April 14, 2006Publication date: August 27, 2009Applicants: Centre National De La Recherche Scientifique-CNRS, Universite De LimogesInventors: Vincent Couderc, Philippe Leproux, Vincent Tombelaine, Pierre-Alain Champert, Sebastien Fevrier, Alain Barthelemy, Jean-Louis Auguste, Jean-Marc Blondy
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Patent number: 7442315Abstract: The present invention relates to a separation device notably for a flow-force fractionation of suspended substances in a liquid carrier, said separation device comprising a separation channel and a counter-channel. The object of the present invention is mainly the separation of living cells, preferably of human origin, in particular cells which are found in body fluids.Type: GrantFiled: June 23, 2005Date of Patent: October 28, 2008Assignee: Universite de LimogesInventors: Philippe Cardot, Serge Battu, Robert Sarrazin
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Publication number: 20070290145Abstract: A system for carrying out fibered multiphoton microscopic imagery of a sample (10) for use in endoscopy or fluorescence microscopy includes: a femtosecond pulsed laser (1, 2) for generating a multiphoton excitation laser radiation; an image guide (8) having a number of optical fibers and permitting the sample to be illuminated by a point-by-point scanning in a subsurface plane; pre-compensating elements (4) for pre-compensating for dispersion effects of the excitation pulses in the image guide (8), these elements being situated between the pulsed laser and the image guide (8); scanning elements for directing, in succession, the excitation laser beam in a fiber of the image guide, and; in particular, an optical head (9) for focussing the excitation laser beam exiting the image guide in the sample (10).Type: ApplicationFiled: October 21, 2005Publication date: December 20, 2007Applicants: Mauna Kea Technologies, Centre National De La Recherche Scientifique, Universite de LimogesInventors: Bertrand Viellerobe, Francois Lacombe, Alexandre Loiseau, Frederic Louradour, Mikael Lelek, Alain Barthelemy, Domoinique Pagnoux
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Publication number: 20070248601Abstract: The invention relates to a non-human transgenic mammal with an IgH locus modified by replacement of the switching sequence S?, with all or part of a transgene comprising the gene C? of a class A human immunoglobulin, including at least the exon, coding for the CH3 domain and the membrane exon and the applications of the above for the production of humanized class IgA antibodies.Type: ApplicationFiled: October 21, 2004Publication date: October 25, 2007Applicants: Centre National De La Recherche Scientifique, Universite De LimogesInventors: Michel Cogne, Christophe Sirac, Micael Bardel, Catherine Decourt, Caroline Le Morvan
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Publication number: 20070216989Abstract: A dedicated polychromatic light generating device including optical pumping devices used to deliver radiation with at least two different excitation wavelengths and a light-guiding device used to deliver polychromatic light at an output when excited by the radiation in a non-linear interaction regime.Type: ApplicationFiled: March 8, 2005Publication date: September 20, 2007Applicants: HORIBA ABX SAS, Universite De Limoges, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRSInventors: Philippe Nerin, Pierre-Alain Champert, Sebastien Fevrier, Philippe Roy, Vincent Couderc, Philippe Leproux, Ludovic Grossard
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Patent number: 6750825Abstract: A monopole wire-plate antenna comprising a ground plane (10), a first radiating element in the form of a capacity top (11, 12) adapted to be connected to a generator, and a second radiating element in the form of a conductor wire (14, 14′, 15, 15′) connecting the capacity top to the ground plane is disclosed. It comprises a plurality of at least one of said radiating elements.Type: GrantFiled: May 2, 1995Date of Patent: June 15, 2004Assignee: Universite de LimogesInventors: Christophe Delaveaud, Bernard Jecko