Patents by Inventor Gilles Tessier
Gilles Tessier has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11953381Abstract: A method for determining wavefront shapes of a multi-spectral signal light beam from a single signal image acquisition of said multi-spectral signal beam, with a device including an optical assembly made at least of an optical mask and an imaging sensor, notably a matrix imaging sensor, for generating and recording intensity patterns of incident beams, by having these beams reflect on, or propagate through, the optical mask. The optical mask having the optical properties: i) to cause the intensity pattern to depend on the wavefront shape, so that a tilt applied to the wavefront shape results in a displacement amount of the intensity pattern, and ii) to produce uncorrelated intensity patterns over at least one surface area A of the imaging sensor, for a plurality of respective incident monochrome beams of different wavelengths having a same wavefront shape.Type: GrantFiled: February 21, 2020Date of Patent: April 9, 2024Assignees: UNIVERSITE DE PARIS, SORBONNE UNIVERSITE, ECOLE POLYTECHNIQUE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Marc Guillon, Pascal Berto, Dimitris Papadopoulos, Gilles Tessier
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Patent number: 11609124Abstract: A method for determining wavefront shapes of N angular channels CL of different propagation directions PL, said propagation directions PL being determined by a mean propagation direction vector , from a single signal image acquisition I(x,y) of a multi-angular signal light beam containing said angular channels, each angular channel Ci being separated from other angular channels Cj by an angular separation ??ij defined by ??ij=arccos, where “·” stands for the inner product between and .Type: GrantFiled: September 28, 2021Date of Patent: March 21, 2023Assignees: UNIVERSITE DE PARIS, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS), INSTITUT NATIONAL DE LA SANTE ET DE LA RECHERCHE MEDICALE (INSERM), SORBONNE UNIVERSITEInventors: Marc Guillon, Gilles Tessier, Tengfei Wu, Pascal Berto
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Publication number: 20220178760Abstract: A method for determining wavefront shapes of a multi-spectral signal light beam from a single signal image acquisition of said multi-spectral signal beam, with a device including an optical assembly made at least of an optical mask and an imaging sensor, notably a matrix imaging sensor, for generating and recording intensity patterns of incident beams, by having these beams reflect on, or propagate through, the optical mask. The optical mask having the optical properties: i) to cause the intensity pattern to depend on the wavefront shape, so that a tilt applied to the wavefront shape results in a displacement amount of the intensity pattern, and ii) to produce uncorrelated intensity patterns over at least one surface area A of the imaging sensor, for a plurality of respective incident monochrome beams of different wavelengths having a same wavefront shape.Type: ApplicationFiled: February 21, 2020Publication date: June 9, 2022Inventors: Marc GUILLON, Pascal BERTO, Dimitris PAPADOPOULOS, Gilles TESSIER
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Publication number: 20220099499Abstract: A method for determining wavefront shapes of N angular channels CL of different propagation directions PL, said propagation directions PL being determined by a mean propagation direction vector , from a single signal image acquisition I(x,y) of a multi-angular signal light beam containing said angular channels, each angular channel Ci being separated from other angular channels Cj by an angular separation ??ij defined by ??ij=arccos, where “.” stands for the inner product between and .Type: ApplicationFiled: September 28, 2021Publication date: March 31, 2022Inventors: Marc GUILLON, Gilles Tessier, Tengfei Wu, Pascal Berto
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Patent number: 10684113Abstract: An optical detection device includes a light source emitting a light beam whose electromagnetic field, a means adapted to divide the beam into a first beam defining a first reference pathway and a second beam defining a second sample pathway, a modulation system frequency-shifting the electromagnetic fields of the two beams, a beam coupler adapted to collect the beams, an optical detection system adapted to detect the signal arising from the interference between the beams and coupled via the coupler, the sample being placed in the sample pathway, the optical detection system comprising an optical detector and a device adapted to measure the amplitude and the phase of the signal, an opaque screen comprising an optical aperture is placed at the level of a zone of a sample, in proximity to the sample, in the sample pathway.Type: GrantFiled: January 6, 2017Date of Patent: June 16, 2020Assignee: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUEInventors: Yannick De Wilde, Lèo Greusard, Gilles Tessier, Sylvain Gigan, Samuel Gresillon, Kamel Bencheikh
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Publication number: 20190041185Abstract: An optical detection device includes a light source emitting a light beam whose electromagnetic field, a means adapted to divide the beam into a first beam defining a first reference pathway and a second beam defining a second sample pathway, a modulation system frequency-shifting the electromagnetic fields of the two beams, a beam coupler adapted to collect the beams, an optical detection system adapted to detect the signal arising from the interference between the beams and coupled via the coupler, the sample being placed in the sample pathway, the optical detection system comprising an optical detector and a device adapted to measure the amplitude and the phase of the signal, an opaque screen comprising an optical aperture is placed at the level of a zone of a sample, in proximity to the sample, in the sample pathway.Type: ApplicationFiled: January 6, 2017Publication date: February 7, 2019Inventors: Yannick DE WILDE, Léo GREUSARD, Gilles TESSIER, Sylvain GIGAN, Samuel GRESILLON, Kamel BENCHEIKH
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Patent number: 9874440Abstract: The invention relates to a method for assessing the depth of a crack near the surface of a material, characterized in that said method includes the following steps: heating an area located near the crack using of a heat source (2) that is periodically modulatable into a heat flow at a controllable frequency, a so-called “modulation frequency”, varying the frequency so as to vary the heat diffusion length between an initial value, less than the distance between the heated area and the crack, and a final value that is greater than the distance between the heated area and the crack; determining the variation, depending on the heat diffusion length, in a function on the basis of at least one derivative, relative to a space variable, of the amplitude of the sinusoidal component of the temperature, on the surface of the material and at the modulation frequency, at each point of a set of points of the crack so as to cause a first area of variation in the function to appear, wherein said function increases at a firstType: GrantFiled: September 20, 2013Date of Patent: January 23, 2018Assignees: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, UNIVERSITE PIERRE ET MARIE CURIE (PARIS 6)Inventors: Christine Boue, Gilles Tessier, Jean-Paul Roger, Mihaela Streza
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Patent number: 9466938Abstract: The invention concerns a system for measuring and controlling the wave-front of a coherent light beam (32), comprising: a device for generating a reference light beam (36) that is coherent with said coherent light beam (32); a partially reflective monolithic device (38) comprising an array of elementary cells, each elementary cell comprising at least one element (40) for measuring a portion of the incident wave interfering between the coherent light beam and the reference light beam and a phase modulation element (42) for modulating the phase of the reflected beam; and a control device (46) for controlling said phase modulation element making use of the information from the associated measuring element.Type: GrantFiled: December 4, 2013Date of Patent: October 11, 2016Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Antoine Dupret, Sylvain Gigan, François Ramaz, Gilles Tessier, Arnaud Verdant
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Publication number: 20150325973Abstract: The invention concerns a system for measuring and controlling the wave-front of a coherent light beam (32), comprising: a device for generating a reference light beam (36) that is coherent with said coherent light beam (32); a partially reflective mo nolithic device (38) comprising an array of elementary cells, each elementary cell comprising at least one element (40) for measuring a portion of the incident wave interfering between the coherent light beam and the reference light beam and a phase modulation element (42) for modulating the phase of the reflected beam; and a control device (46) for controlling said phase modulation element making use of the information from the associated measuring element.Type: ApplicationFiled: December 4, 2013Publication date: November 12, 2015Inventors: Antoine DUPRET, Sylvain GIGAN, François RAMAZ, Gilles TESSIER, Arnaud VERDANT
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Publication number: 20150241212Abstract: The invention relates to a method for assessing the depth of a crack near the surface of a material, characterized in that said method includes the following steps: heating an area located near the crack using of a heat source (2) that is periodically modulatable into a heat flow at a controllable frequency, a so-called “modulation frequency”, varying the frequency so as to vary the heat diffusion length between an initial value, less than the distance between the heated area and the crack, and a final value that is greater than the distance between the heated area and the crack; determining the variation, depending on the heat diffusion length, in a function on the basis of at least one derivative, relative to a space variable, of the amplitude of the sinusoidal component of the temperature, on the surface of the material and at the modulation frequency, at each point of a set of points of the crack so as to cause a first area of variation in the function to appear, wherein said function increases at a firstType: ApplicationFiled: September 20, 2013Publication date: August 27, 2015Inventors: Christine Boue, Gilles Tessier, Jean-Paul Roger, Mihaela Streza