Patents by Inventor François Dufresne de Virel
François Dufresne de Virel 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: 10175699Abstract: The present invention relates to a method for automatically assisting with the landing of an aircraft on a runway from a return point (A) to a completion point (D), at which the aircraft touches the runway, by means of a data-processing device on-board said aircraft, which device is configured to be connected to an altimeter and a deviation meter, the method including: a return-navigation assistance phase including guidance of the aircraft, on the basis of measurements of the azimuth deviation of the aircraft relative to a reference direction linking said return point (A) and the position of the deviation meter (E) transmitted by said deviation meter, from the return point (A) towards the position of the deviation meter (E), determination of the position of the aircraft at a predetermined capture point (B) that is aligned with the return point (A) and the position of the deviation meter (E), and guidance of the aircraft along a predetermined path from the capture point (B) to a predetermined holding point (C)Type: GrantFiled: July 15, 2016Date of Patent: January 8, 2019Assignee: SAFRAN ELECTRONICS AND DEFENSEInventors: Alain Chiodini, Francois Dufresne De Virel, Sylvain Pouillard
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Publication number: 20180203466Abstract: The present invention relates to a method for automatically assisting with the landing of an aircraft on a runway from a return point (A) to a completion point (D), at which the aircraft touches the runway, by means of a data-processing device on-board said aircraft, which device is configured to be connected to an altimeter and a deviation meter, the method including: a return-navigation assistance phase including guidance of the aircraft, on the basis of measurements of the azimuth deviation of the aircraft relative to a reference direction linking said return point (A) and the position of the deviation meter (E) transmitted by said deviation meter, from the return point (A) towards the position of the deviation meter (E), determination of the position of the aircraft at a predetermined capture point (B) that is aligned with the return point (A) and the position of the deviation meter (E), and guidance of the aircraft along a predetermined path from the capture point (B) to a predetermined holding point (C)Type: ApplicationFiled: July 15, 2016Publication date: July 19, 2018Applicant: Safran Electronics & DefenseInventors: Alain CHIODINI, Francois DUFRESNE DE VIREL, Sylvain POUILLARD
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Patent number: 9683893Abstract: The invention relates to a system for detection and infrared imaging by spectral analysis in several wavelength bands comprising: —an imaging sensor comprising a plurality of elementary sensors together forming a matrix sensitive surface; —an imaging optic adapted for forming on the sensitive surface of the imaging sensor, a first image of the scene to be analyzed in a first wavelength band, and at least one second image of the scene to be analyzed in a second wavelength band, characterized in that said detection and imaging system furthermore comprises an optical device consisting of a fixed optical plate adapted for shifting the first image with respect to the second image in the plane of the sensitive surface, the shift between the images being along a direction defined by a row, a column or a diagonal of elementary sensors, the shift distance being equal to the spacing of the elementary sensors of the matrix sensitive surface along this direction or to a multiple of this spacing.Type: GrantFiled: March 19, 2014Date of Patent: June 20, 2017Assignee: SAGEM DEFENSE SECURITEInventors: Francois Dufresne De Virel, Marc Bousquet
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Publication number: 20160327432Abstract: The invention relates to a system for detection and infrared imaging by spectral analysis in several wavelength bands comprising: —an imaging sensor comprising a plurality of elementary sensors together forming a matrix sensitive surface; —an imaging optic adapted for forming on the sensitive surface of the imaging sensor, a first image of the scene to be analysed in a first wavelength band, and at least one second image of the scene to be analysed in a second wavelength band, characterized in that said detection and imaging system furthermore comprises an optical device consisting of a fixed optical plate adapted for shifting the first image with respect to the second image in the plane of the sensitive surface, the shift between the images being along a direction defined by a row, a column or a diagonal of elementary sensors, the shift distance being equal to the spacing of the elementary sensors of the matrix sensitive surface along this direction or to a multiple of this spacing.Type: ApplicationFiled: March 19, 2014Publication date: November 10, 2016Inventors: FRANCOIS DUFRESNE DE VIREL, MARC BOUSQUET
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Patent number: 8997451Abstract: An engine and pod assembly for an aircraft includes a pod receiving an engine having an air intake. A rotating nose cone extends on the nose cone, as well as a device for limiting the formation of ice. The device includes means for creating a circumferential heterogeneity of ice on the nose cone.Type: GrantFiled: March 12, 2010Date of Patent: April 7, 2015Assignee: Sagem Defense SecuriteInventors: François Dufresne de Virel, Michel Pealat, Patrick Joyez, Bruce Pontoizeau, Jean-François Lacuisse, Sylvie Wintenberger
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Patent number: 8698667Abstract: The invention concerns a device for countering and tracking a threat in the form of a homing-head missile, comprising a homing head adapted to receive an incident coherent light beam and to deflect same to produce a transmitted beam. The invention is characterized in that the homing head comprises a biprism including two prisms made of different materials and adapted to divide the transmitted beam into two sub-beams, the refractive index difference between the prisms being adapted to introduce an optical path difference between the two sub-beams which is greater than the coherence length of the incident beam.Type: GrantFiled: February 22, 2006Date of Patent: April 15, 2014Assignee: Sagem Defense SecuriteInventors: Julien Aragones, François Dufresne De Virel, Jacques Robineau
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Patent number: 8432251Abstract: A device for capturing biometric characteristics, the device having an optical sensor with a field of view covering a detection zone for detecting optical characteristics, and an electronic control unit that is connected to the sensor in order to control it, the control unit being placed at least in part in the field of view of the sensor and includes a memory containing at least one signature resulting from at least one reference optical characteristic of the control unit as seen by the sensor, and a comparator module for comparing the signature with at least one corresponding signature that results from at least one optical characteristic of the control unit as supplied by the sensor.Type: GrantFiled: February 12, 2008Date of Patent: April 30, 2013Assignee: MorphoInventors: Eric Saliba, François Dufresne De Virel
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Publication number: 20120036826Abstract: An engine and pod assembly for an aircraft includes a pod receiving an engine having an air intake. A rotating nose cone extends on the nose cone, as well as a device for limiting the formation of ice. The device includes means for creating a circumferential heterogeneity of ice on the nose cone.Type: ApplicationFiled: March 12, 2010Publication date: February 16, 2012Applicant: SAGEM DEFENSE SECURITEInventors: Francois Dufresne De Virel, Michel Pealat, Patrick Joyez, Bruce Pontoizeau, Jean-Francois Lacuisse, Sylvie Wintenberger
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Patent number: 8113458Abstract: A device for printing on a strip of paper shaped as a roll about a spool, the device comprising a housing for receiving the roll, means for supporting the roll from beneath in the housing and for horizontally centering the roll substantially on a vertical reference axis, a travel path for the strip of paper from the housing to a printer member, and a control member associated with a drive member for driving the strip of paper along the travel path, the device comprises at least one sensor for sensing the position of the spool along the vertical reference axis, the sensor being secured to at least one side face of the housing, and being connected to the control member for controlling the drive member.Type: GrantFiled: October 12, 2006Date of Patent: February 14, 2012Assignee: MorphoInventors: Xavier Chaussade, François Dufresne De Virel, Jean-François Lallemant
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Patent number: 8023182Abstract: Device for collecting a flux of electromagnetic radiation in the extreme ultraviolet (EUV) emitted by a source, including a main, first collector stage, with a concave collector mirror placed in front of the source at a distance of greater than 250 mm and pierced by a central hole, and a convex mirror placed behind the concave mirror level with the source and pierced by a central hole, and at least a second collector stage with a concave collector mirror placed in front of the stage and pierced by a central hole and a convex mirror placed behind the concave mirror.Type: GrantFiled: April 4, 2007Date of Patent: September 20, 2011Assignee: Sagem Defense SecuriteInventors: Roland Geyl, Vincent Patoz, François Riguet, François Dufresne De Virel
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Patent number: 7918674Abstract: A protection system for a connector that comprises two connector elements (1, 2) provided with open ends that are mutually engagable one in the other along an engagement direction, the system comprising first and second shutters (11, 21), each connected to a respective one of the open ends via a laterally-offset hinge (12, 22) of axis parallel to the engagement direction, in such a manner that each shutter can be pivoted between a position in which it shuts the corresponding open end and a position in which it disengages it, the shutters having respective front faces provided with means (17, 27) enabling them to be constrained to pivot together about the hinge axis, and the hinge of the first shutter being mounted on the corresponding end so as to be movable in translation parallel to the engagement direction between a position in which the shutter is flush with the open end and a position in which it is set back from the open end.Type: GrantFiled: July 10, 2009Date of Patent: April 5, 2011Assignee: Sagem Defense SecuriteInventor: François Dufresne de Virel
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Publication number: 20110006222Abstract: The invention concerns a device for countering and tracking a threat in the form of a homing-head missile, comprising a homing head adapted to receive an incident coherent light beam and to deflect same to produce a transmitted beam. The invention is characterized in that the homing head comprises a biprism including two prisms made of different materials and adapted to divide the transmitted beam into two sub-beams, the refractive index difference between the prisms being adapted to introduce an optical path difference between the two sub-beams which is greater than the coherence length of the incident beam.Type: ApplicationFiled: February 22, 2006Publication date: January 13, 2011Inventors: Julien Aragones, Francois Dufresne De Virel, Jacques Robineau
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Publication number: 20100127826Abstract: A device for capturing biometric characteristics, the device having an optical sensor with a field of view covering a detection zone for detecting optical characteristics, and an electronic control unit that is connected to the sensor in order to control it, the control unit being placed at least in part in the field of view of the sensor and includes a memory containing at least one signature resulting from at least one reference optical characteristic of the control unit as seen by the sensor, and a comparator module for comparing the signature with at least one corresponding signature that results from at least one optical characteristic of the control unit as supplied by the sensor.Type: ApplicationFiled: February 12, 2008Publication date: May 27, 2010Inventors: Eric Saliba, François Dufresne De Virel
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Publication number: 20100022110Abstract: A protection system for a connector that comprises two connector elements (1, 2) provided with open ends that are mutually engagable one in the other along an engagement direction, the system comprising first and second shutters (11, 21), each connected to a respective one of the open ends via a laterally-offset hinge (12, 22) of axis parallel to the engagement direction, in such a manner that each shutter can be pivoted between a position in which it shuts the corresponding open end and a position in which it disengages it, the shutters having respective front faces provided with means (17, 27) enabling them to be constrained to pivot together about the hinge axis, and the hinge of the first shutter being mounted on the corresponding end so as to be movable in translation parallel to the engagement direction between a position in which the shutter is flush with the open end and a position in which it is set back from the open end.Type: ApplicationFiled: July 10, 2009Publication date: January 28, 2010Inventor: Francois Dufresne De Virel
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Publication number: 20090244696Abstract: Device for collecting a flux of electromagnetic radiation in the extreme ultraviolet (EUV) emitted by a source (S), comprising a main, first collector stage (E1), with a concave collector mirror (2) placed in front of the source (S) at a distance of greater than 250 mm and pierced by a central hole (3) and a convex mirror (4) placed behind the concave mirror level with the source and pierced by a central hole (5), and at least a second collector stage (E2) with a concave collector mirror (7) placed in front of the stage (E1) and pierced by a central hole (8) and a convex mirror (9) placed behind the concave mirror.Type: ApplicationFiled: April 4, 2007Publication date: October 1, 2009Inventors: Roland Geyl, Vincent Patoz, Francois Riguet, Francois Dufresne De Virel
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Publication number: 20090046331Abstract: A biodetector permits formation of an image of the inner face of the hand or of a finger of a user when the hand or the finger (101) is placed in front of an image-forming device (11), at a defined height (F). The height is adapted such that the biodetection image is sufficiently clear and is indicated to the user by means of a sign (40) projected onto the outer face of the hand or of the finger. Such a biodetector does not require the hand or finger to be applied to a support surface, and it permits intuitive and rapid use of the biodetector.Type: ApplicationFiled: February 21, 2007Publication date: February 19, 2009Applicant: SAGEM DEFENSE SECURITEInventor: Francois Dufresne de Virel
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Publication number: 20080088890Abstract: The invention relates to a sheet-fed scanner (300) comprising: an illumination device for emitting a luminous flux covering several spectral bands which is intended to illuminate a sheet (204) to be scanned, a focussing device (150), and a detection module (360) comprising a sensor (164) which comprises a plurality of rows (166, 168, 170) of sensitive elements, each sensitive element being provided to deliver an electrical energy that is proportional to the intensity of the luminous flux received, and each row being provided to have its sensitivity peak for one of said spectral bands, the focussing device being provided to focus, onto each of the rows, part of the luminous flux reflected by said sheet, the sheet-fed scanner (300) being characterised in that the detection module (360) comprises a non-prismatic spectral shift device (305) for shifting each part of the luminous flux thus focussed, parallel to said rows (166, 168, 170), the shift being different for each row (166, 168, 170).Type: ApplicationFiled: October 4, 2007Publication date: April 17, 2008Applicant: Sagem SecuriteInventor: Francois Dufresne de Virel
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Publication number: 20070091159Abstract: A device for printing on a strip of paper shaped as a roll about a spool, the device comprising a housing for receiving the roll, means for supporting the roll from beneath in the housing and for horizontally centering the roll substantially on a vertical reference axis, a travel path for the strip of paper from the housing to a printer member, and a control member associated with a drive member for driving the strip of paper along the travel path, the device comprises at least one sensor for sensing the position of the spool along the vertical reference axis, the sensor being secured to at least one side face of the housing, and being connected to the control member for controlling the drive member.Type: ApplicationFiled: October 12, 2006Publication date: April 26, 2007Applicant: SAGEM DEFENSE SECURITEInventors: Xavier Chaussade, Francois Dufresne De Virel, Jean-Francois Lallemant
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Patent number: 4905936Abstract: The optical sighting device makes it possible to increase the quality of ical transmission by preventing turbulences from forming in the field of vision at high speed, by means of an airstream-deflecting device which is mounted in the turbulence formation zone and which has a profile in the form of a stem-post to dispel the air-streams laterally. In the case of transparent plane wall via which vision takes place in this zone, the deflecting device can consist of an attached plates which is connected to or located in the vicinity of the wall.Type: GrantFiled: November 30, 1984Date of Patent: March 6, 1990Assignees: Thomson-Csf, Office National d'Etudes et al Recherches Aerospatiales (Onera)Inventors: Francois Dufresne de Virel, Michel Poliet, Gerard Laruelle, Jacques Coste, Claude Sans