Patents by Inventor Laurent Potin

Laurent Potin 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).

  • Patent number: 9754381
    Abstract: The general field of the invention is that of systems for detecting the posture of a moving object. The system may include a fixed electro-optical device of known orientation comprising an emission source, an image sensor and image analysis means, and an optical assembly comprising an optical retroreflector arranged on the moving object. The optical retroreflector of the system is an optical sphere of variable index comprising a transparent hemisphere and a reflecting hemisphere. It comprises a meshing comprising at least three opaque wires, of small thickness and known geometrical arrangement. The image of the retroreflector lit by the source forms a reflection on the image sensor, said reflection comprising at least the two images of the shadow of one of the three wires. The image analysis means detect the orientation of the leak line given by said images, said orientation being representative of one of the parameters of the posture of the moving object.
    Type: Grant
    Filed: August 24, 2015
    Date of Patent: September 5, 2017
    Assignee: Thales
    Inventors: Bruno Barbier, Laurent Potin, Siegfried Rouzes
  • Patent number: 9285212
    Abstract: The general field of the invention is that of systems for detecting the posture of a mobile object in space. The system according to the invention comprises an electro-optical device comprising a light source, a photoreceptor and means of analysis, and a retro-reflecting cube corner disposed on the mobile object. The cube corner comprises a mask disposed on its entry face. The source emits a parallel or almost-parallel pencil beam. The electro-optical device comprises means for deviating, about a fixed point, the said pencil beam of light by an angle varying as a function of time. The photoreceptor is configured for receiving the pencil beam of light retro-reflected by the cube corner. The means of analysis are configured in such a manner as to determine, based on the signal coming from the photoreceptor, the position of a number of points representative of the borders of the mask and, using this positional information, the posture of the cube corner in space.
    Type: Grant
    Filed: October 10, 2014
    Date of Patent: March 15, 2016
    Assignee: Thales
    Inventors: Bruno Barbier, Laurent Potin, Siegfried Rouzes
  • Publication number: 20160063730
    Abstract: The general field of the invention is that of systems for detecting the posture of a moving object. The system may include a fixed electro-optical device of known orientation comprising an emission source, an image sensor and image analysis means, and an optical assembly comprising an optical retroreflector arranged on the moving object. The optical retroreflector of the system is an optical sphere of variable index comprising a transparent hemisphere and a reflecting hemisphere. It comprises a meshing comprising at least three opaque wires, of small thickness and known geometrical arrangement. The image of the retroreflector lit by the source forms a reflection the image sensor, said reflection comprising at least the two images of the shadow of one of the three wires. The image analysis means detect the orientation of the leak line given by said images, said orientation being representative of one of the parameters of the posture of the moving object.
    Type: Application
    Filed: August 24, 2015
    Publication date: March 3, 2016
    Inventors: Bruno BARBIER, Laurent POTIN, Siegfried ROUZES
  • Patent number: 9109878
    Abstract: The general field of the invention is that of systems for detecting the posture of a mobile object. The systems according to the invention comprise a fixed electro-optical device comprising an emission source and a photosensitive sensor. The optical corner cube is arranged on the mobile object. The entry face of the corner cube has a predetermined geometry, the light coming from the source and reflected back by the corner cube forming a luminous contour on the matrix sensor. The fixed electro-optical device comprises an optical element with a known shape and location, which is placed in the vicinity of the said source and is arranged so as to form a dark zone in the central part of the luminous contour. The detection system comprises analysis means determining the position and the orientation of the mobile object from knowledge of the vanishing points of the luminous contour and the position and shape of the dark zone.
    Type: Grant
    Filed: June 6, 2014
    Date of Patent: August 18, 2015
    Assignee: Thales
    Inventors: Bruno Barbier, Laurent Potin, Siegfried Rouzes
  • Patent number: 9046347
    Abstract: The overall field of the invention is that of systems for detecting the posture of a moving object in space. The device according to the invention comprises: a fixed electrooptical device comprising a point emission source, a telecentric lens comprising a projection lens, a reception lens and a semireflective optical element and a photosensitive matrix-type sensor, the point emission source being arranged at the common focal point of the projection lens and of the reception lens by reflection or transmission through the semireflective optical element, and; an assembly comprising at least three corner cube retroreflectors which are arranged on the moving object. The main application of this device is the detection of the orientation of an aircraft pilot helmet.
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: June 2, 2015
    Assignee: Thales
    Inventors: Bruno Barbier, Laurent Potin, Siegfried Rouzes
  • Publication number: 20150103359
    Abstract: The general field of the invention is that of systems for detecting the posture of a mobile object in space. The system according to the invention comprises an electro-optical device comprising a light source, a photoreceptor and means of analysis, and a retro-reflecting cube corner disposed on the mobile object. The cube corner comprises a mask disposed on its entry face. The source emits a parallel or almost-parallel pencil beam. The electro-optical device comprises means for deviating, about a fixed point, the said pencil beam of light by an angle varying as a function of time. The photoreceptor is configured for receiving the pencil beam of light retro-reflected by the cube corner. The means of analysis are configured in such a manner as to determine, based on the signal coming from the photoreceptor, the position of a number of points representative of the borders of the mask and, using this positional information, the posture of the cube corner in space.
    Type: Application
    Filed: October 10, 2014
    Publication date: April 16, 2015
    Inventors: Bruno BARBIER, Laurent Potin, Siegfried Rouzes
  • Publication number: 20140362386
    Abstract: The general field of the invention is that of systems for detecting the posture of a mobile object. The systems according to the invention comprise a fixed electro-optical device comprising an emission source and a photosensitive sensor. The optical corner cube is arranged on the mobile object. The entry face of the corner cube has a predetermined geometry, the light coming from the source and reflected back by the corner cube forming a luminous contour on the matrix sensor. The fixed electro-optical device comprises an optical element with a known shape and location, which is placed in the vicinity of the said source and is arranged so as to form a dark zone in the central part of the luminous contour. The detection system comprises analysis means determining the position and the orientation of the mobile object from knowledge of the vanishing points of the luminous contour and the position and shape of the dark zone.
    Type: Application
    Filed: June 6, 2014
    Publication date: December 11, 2014
    Inventors: Bruno BARBIER, Laurent POTIN, Siegfried ROUZES
  • Publication number: 20140320640
    Abstract: The general field of the invention is that of systems for optically detecting the posture of an object which is mobile in space. The system according to the invention comprises an optical assembly comprising a plurality of optical corner cubes arranged on the mobile object. The entry face of the corner cubes is divided into three separate coloured regions having a spectral transmission filter transmitting only a predetermined spectral band different from those of the other filters, each side of the said coloured regions has a specific marking making it possible to identify this said side, and the spectrum of the emission source has a spectral width equal to the sum of the spectral bands of the said filters. The associated fixed electro-optical device of known orientation comprises at least one colour matrix sensor and the image analysis means comprise means for determining shapes and geometrical characteristics in the images received by the colour matrix sensor or sensors.
    Type: Application
    Filed: April 24, 2014
    Publication date: October 30, 2014
    Inventors: Bruno BARBIER, Laurent POTIN, Siegfried ROUZES
  • Patent number: 8854612
    Abstract: The field of the invention is that of optical systems for detecting the posture of a mobile object in space. The system comprises an electro-optical fixed device of known orientation comprising a first point emission source, a telecentric emission/reception optic and a photosensitive matrix sensor. An assembly comprising an optical cubic wedge is disposed on the mobile object. The input face of the cubic wedge comprises a mask in the shape of a parallelogram, each side of the parallelogram comprising a geometric marking making it possible to identify it, the image of the mask projected on the photosensitive matrix sensor, by reflection on the faces of the cubic wedge, being the intersection of the projection of the mask and of the projection of its image inverted with respect to the centeR of the cubic wedge. Analysis of this image makes it possible to determine the orientation of the cubic wedge.
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: October 7, 2014
    Assignee: Thales
    Inventors: Bruno Barbier, Laurent Potin, Siegfried Rouzes
  • Patent number: 8810806
    Abstract: The general field of the invention is that of systems for the optical detection of the orientation and the position of a mobile object in space. The system comprises a fixed electro-optical device comprising a transmission point source, image analysis means and an optical cube corner disposed on the mobile object. The input surface of the cube corner comprises a polygonal-shaped mask, the sides of which comprise a geometric marking to identify them. The fixed electro-optical device comprises photosensitive means close to the point source and disposed in two different recording planes and recording two luminous shapes in perspective of the mask obtained by reflection on the surfaces of the cube corner. The image analysis means comprise means for determining the vanishing points of the two luminous shapes in the two recording planes, the knowledge of the four vanishing points enabling the determination of the position and orientation of the optical cube corner in relation to the fixed electro-optical device.
    Type: Grant
    Filed: July 12, 2013
    Date of Patent: August 19, 2014
    Assignee: Thales
    Inventors: Bruno Barbier, Laurent Potin, Siegfried Rouzes
  • Publication number: 20140016138
    Abstract: The general field of the invention is that of systems for the optical detection of the orientation and the position of a mobile object in space. The system comprises a fixed electro-optical device comprising a transmission point source, image analysis means and an optical cube corner disposed on the mobile object. The input surface of the cube corner comprises a polygonal-shaped mask, the sides of which comprise a geometric marking to identify them. The fixed electro-optical device comprises photosensitive means close to the point source and disposed in two different recording planes and recording two luminous shapes in perspective of the mask obtained by reflection on the surfaces of the cube corner. The image analysis means comprise means for determining the vanishing points of the two luminous shapes in the two recording planes, the knowledge of the four vanishing points enabling the determination of the position and orientation of the optical cube corner in relation to the fixed electro-optical device.
    Type: Application
    Filed: July 12, 2013
    Publication date: January 16, 2014
    Inventors: Bruno BARBIER, Laurent Potin, Siegfried Rouzes
  • Patent number: 8605295
    Abstract: The general field of the invention is that of optical position/orientation devices for a helmet and more particularly those whose helmet comprises neither emitters, nor receivers but solely passive optical components, detection of which is ensured by fixed opto-electronic means outside the helmet. The optical component for the optical device for detecting position/orientation of a helmet according to the invention comprises a particular “optical cube corner”. It comprises a prism in the form of a trirectangular trihedron, each of the three plane surfaces of the trihedron comprising a blade with plane and mutually parallel faces, the first face being coincident with the plane surface on which it rests, the interface between this first face and said surface comprising a semi-reflecting treatment.
    Type: Grant
    Filed: December 2, 2010
    Date of Patent: December 10, 2013
    Assignee: Thales
    Inventors: Laurent Potin, Siegfried Rouzes, Jean-Pierre Gerbe
  • Publication number: 20130057852
    Abstract: The field of the invention is that of optical systems for detecting the posture of a mobile object in space. The system comprises an electro-optical fixed device of known orientation comprising a first point emission source, a telecentric emission/reception optic and a photosensitive matrix sensor. An assembly comprising an optical cubic wedge is disposed on the mobile object. The input face of the cubic wedge comprises a mask in the shape of a parallelogram, each side of the parallelogram comprising a geometric marking making it possible to identify it, the image of the mask projected on the photosensitive matrix sensor, by reflection on the faces of the cubic wedge, being the intersection of the projection of the mask and of the projection of its image inverted with respect to the centre of the cubic wedge. Analysis of this image makes it possible to determine the orientation of the cubic wedge.
    Type: Application
    Filed: August 3, 2012
    Publication date: March 7, 2013
    Inventors: Bruno BARBIER, Laurent Potin, Siegfried Rouzes
  • Publication number: 20130033711
    Abstract: The overall field of the invention is that of systems for detecting the posture of a moving object in space. The device according to the invention comprises: a fixed electrooptical device comprising a point emission source, a telecentric lens comprising a projection len a reception lens and a semireflective optical element and a photosensitive matrix-type sensor, the point emission source being arranged at the common focal point of the projection lens and of the reception lens by reflection or transmission through the semireflective optical element, and; an assembly comprising at least three retroreflector devices of the “corner cube” type which are arranged on the moving object. The main application of this device is the detection of the orientation of an aircraft pilot helmet.
    Type: Application
    Filed: August 3, 2012
    Publication date: February 7, 2013
    Inventors: Bruno BARBIER, Laurent Potin, Siegfried Rouzes
  • Publication number: 20130033709
    Abstract: The general field of the invention is that of optical systems for detection of the orientation of mobile objects in space. The main application is helmet posture detection inside of an aircraft cockpit. The system according to the invention operates by interferometry. It comprises a fixed electro-optical device comprising one or more collimated point-like emission sources and a detection assembly comprising one or more point-like photosensitive detectors. Two or more retro-reflecting devices referred to as “cube corner” are disposed on the mobile object. This system can be completed by optical means operating in polarized light mode allowing the direction of variation of the interference fringes to be determined and by other optical devices allowing an initial orientation to be measured.
    Type: Application
    Filed: August 3, 2012
    Publication date: February 7, 2013
    Inventors: Laurent POTIN, Bruno Barbier, Siegfried Rouzes
  • Publication number: 20120236321
    Abstract: The general field of the invention is that of optical position/orientation devices for a helmet and more particularly those whose helmet comprises neither emitters, nor receivers but solely passive optical components, detection of which is ensured by fixed opto-electronic means outside the helmet. The optical component for the optical device for detecting position/orientation of a helmet according to the invention comprises a particular “optical cube corner”. It comprises a prism in the form of a trirectangular trihedron, each of the three plane surfaces of the trihedron comprising a blade with plane and mutually parallel faces, the first face being coincident with the plane surface on which it rests, the interface between this first face and said surface comprising a semi-reflecting treatment.
    Type: Application
    Filed: December 2, 2010
    Publication date: September 20, 2012
    Inventors: Laurent Potin, Siegfried Rouzes, Jean-Pierre Gerbe
  • Publication number: 20110006984
    Abstract: The general field of the invention is that of optical devices for detecting the position/orientation of a helmet. The device according to the invention comprises an optional stationary light source, a stationary camera associated with an image processing system, and a helmet. The helmet has a scattering coating and includes at least one set of markers, each marker comprising at least a first optical element having a very low reflection coefficient, a very low scattering coefficient and a very high absorption coefficient in the visible range and in that of the light source. In one embodiment, each marker may also include a first optical element having a very high retroreflection coefficient and a very low scattering coefficient in the visible range. The marker may also include a second optical element having a high scattering or phosphorescence coefficient in the emission range of the light source.
    Type: Application
    Filed: July 9, 2010
    Publication date: January 13, 2011
    Applicant: THALES
    Inventors: Jean-Noël Perbet, Bruno Barbier, Laurent Potin
  • Patent number: 6788442
    Abstract: An optical device for a system presenting collimated images through an off-axis spherical concave mirror. An image can be presented to a user with correction of eccentric distortion caused by the off-axis spherical concave mirror without altering the quality of the image. A diffractive mirror is set in the neighborhood of an intermediate image, and preferably a second intermediate image. The extent of the neighborhood is limited by image resolution and, in the neighborhood, the correction by the diffractive mirror does not alter the resolution. The diffractive mirror may include a hologram which may be digital or made of a photosensitive material. A hologram substrate is preferably not planar to operate partly upon the correction, the residual correction being carried out by the hologram. Such a device may find application to an aircraft pilot's visor.
    Type: Grant
    Filed: April 6, 2001
    Date of Patent: September 7, 2004
    Assignee: Thomson-CSF Sexant
    Inventors: Laurent Potin, Laurent Bignolles
  • Patent number: 6715150
    Abstract: Visors for helmets are generally of spherical shape and of constant thickness, and articulated to the side walls of a helmet at the level of the forehead, about an axis of articulation passing through the center of their sphere. Thus shaped and mounted, they are seen off axis by a helmet wearer leading to optical distortions for him caused by diffraction effects on their internal and external faces. Visors with shapes modified to minimize the optical distortions perceived by a helmet wearer are proposed here. A first type of modification consists of a relative pivoting, in the vertical plane, of one of the faces of the visor with respect to the other and of a slight reduction in the ratio of the radius of curvature of the outer face of the visor to that of the inner face of the visor compared to the usual concentric bispherical visor. A second type of modification consists of adopting one or two aspherical surfaces of particular shape.
    Type: Grant
    Filed: October 4, 2001
    Date of Patent: April 6, 2004
    Assignee: Thales Avionics S.A.
    Inventor: Laurent Potin
  • Patent number: 6504658
    Abstract: The invention relates to an optical device for a system for presenting collimated images including an off-axis spherical mirror. The device has an additional aspherical mirror whose surface forms, in the plane of symmetry of the unfolded optical system, a curve whose radius of curvature is variable. The surface provides for correction of the image of a pupil of an eye given by the spherical mirror and the pupil image is rectified on the optical axis. The surface may be a paraboloid, an ellipsoid and it may exhibit symmetry of revolution.
    Type: Grant
    Filed: February 1, 2000
    Date of Patent: January 7, 2003
    Assignee: Sextant Avionique
    Inventors: Laurent Bignolles, Laurent Potin