Abstract: A tracking system and a method for 3D tracking of a medical device, equipped of at least one ultrasound sensor, inside an anatomical region of a subject having at least one layer of a first tissue type at least partially surrounding a volume having at least one second tissue type, wherein the properties of ultrasounds propagation in the first and second tissue type are different.

Abstract: This system for real-time localization of a millimetric or submillimetric object, such as a microrobot, in a viscoelastic medium, in particular in an organ of a subject such as a brain, a liver or a pancreas, includes: at least one bubble configured to be attached to said object, the or each bubble having a hermetic envelope filled with a gas; at least one ultrasound transducer configured to emit initial ultrasound signals and to detect deflected ultrasound signals deflected at the surface of the bubble(s); a processing unit in communication with the ultrasound transducers and configured to generate localization data of the object from localization data of the bubble(s) based on the deflected ultrasound signals detected by the ultrasound transducers.

Abstract: This system for real-time localization of a millimetric or submillimetric object, such as a microrobot, in a viscoelastic medium, in particular in an organ of a subject such as a brain, a liver or a pancreas, includes: at least one bubble configured to be attached to said object, the or each bubble having a hermetic envelope filled with a gas; at least one ultrasound transducer configured to emit initial ultrasound signals and to detect deflected ultrasound signals deflected at the surface of the bubble(s); a processing unit in communication with the ultrasound transducers and configured to generate localization data of the object from localization data of the bubble(s) based on the deflected ultrasound signals detected by the ultrasound transducers.

Abstract: An interface with haptic force feedback, including a controller arranged and/or programmed to receive an initial command designed to control an actuator so that a force exerted by the actuator is equal to an initial low-frequency part F0(t) plus an optional high-frequency part; the initial command transformed into a command in which the initial low-frequency part F0(t) is transformed into a modified low-frequency part F(t) which follows in amplitude a decreasing function and for which, over any time interval of duration ?t between an instant t and an instant t+?t, the modified low-frequency part F(t) decreases by a value X of less than or equal to 10% of the initial value of the modified low-frequency part of the force F(t) at the instant t, the duration ?t of the time interval being greater than or equal to 0.3 second; control the actuator according to the transformed command.

Abstract: The present invention concerns a device (101, 102, 103, 104) for measuring force, comprising: a movable member (1); guide means (2) for guiding the movable member along at least one degree of freedom; position measuring means (3) for measuring the position of the movable member; at least one actuator (4) for applying an actuator force (7) to the movable member; a control system (5), arranged to send a control signal to the at least one actuator, the actuator force depending on the control signal, the control system being arranged to modify the control signal according to a measurement of the position of the movable member by the position measuring means; force measuring means (6) arranged to provide, from the control signal sent by the control system to the at least one actuator, a value of a force to be measured (8) being applied to the movable member and separate from the actuator force.

Abstract: Method for visual tracking of at least one object represented by a cluster of points with which information is associated, characterised in that it includes steps to: receive (E1) data representing a set of space-time events, determine (E2) the probability that an event in the set belongs to the cluster of points representing the at least one object, for each event in the received set, determine (E3) whether or not an event belongs to the cluster of points as a function of the determined probability for the event considered, for each event in the received set, update (E4) information associated with the cluster of points for at least one object, for each event for which it was determined in the previous step that it belongs to the cluster of points, calculate (E4, E5) the position, size and orientation of the at least one object as a function of the updated information.

Abstract: Method for visual tracking of at least one object represented by a cluster of points with which information is associated, characterised in that it includes steps to: receive (E1) data representing a set of space-time events, determine (E2) the probability that an event in the set belongs to the cluster of points representing the at least one object, for each event in the received set, determine (E3) whether or not an event belongs to the cluster of points as a function of the determined probability for the event considered, for each event in the received set, update (E4) information associated with the cluster of points for at least one object, for each event for which it was determined in the previous step that it belongs to the cluster of points, calculate (E4, E5) the position, size and orientation of the at least one object as a function of the updated information.

Abstract: Method for visual tracking of at least one object represented by a cluster of points with which information is associated, characterized in that it includes steps to: receive (E1) data representing a set of space-time events, determine (E2) the probability that an event in the set belongs to the cluster of points representing the at least one object, for each event in the received set, determine (E3) whether or not an event belongs to the cluster of points as a function of the determined probability for the event considered, for each event in the received set, update (E4) information associated with the cluster of points for at least one object, for each event for which it was determined in the previous step that it belongs to the cluster of points, calculate (E4, E5) the position, size and orientation of the at least one object as a function of the updated information.

Abstract: A rear-projection display device comprises a mobile light source supplying a light beam of at least one wavelength, a holographic mirror reflecting only said at least one wavelength, an absorbent screen and a transmissive diffuser, the absorbent screen being placed on the rear face of the holographic mirror, the elements being arranged such that the beam from the light source is reflected on the holographic mirror in order to sweep the surface of the transmissive diffuser.

Abstract: A rear-projection display device comprises a mobile light source supplying a light beam of at least one wavelength, a holographic mirror reflecting only said at least one wavelength, an absorbent screen and a transmissive diffuser, the absorbent screen being placed on the rear face of the holographic mirror, the elements being arranged such that the beam from the light source is reflected on the holographic mirror in order to sweep the surface of the transmissive diffuser.

Abstract: Method for visual tracking of at least one object represented by a cluster of points with which information is associated, characterised in that it includes steps to: receive (E1) data representing a set of space-time events, determine (E2) the probability that an event in the set belongs to the cluster of points representing the at least one object, for each event in the received set, determine (E3) whether or not an event belongs to the cluster of points as a function of the determined probability for the event considered, for each event in the received set, update (E4) information associated with the cluster of points for at least one object, for each event for which it was determined in the previous step that it belongs to the cluster of points, calculate (E4, E5) the position, size and orientation of the at least one object as a function of the updated information.

Abstract: A device, having first and second motor units, for generating a torque on an output member in response to a torque setpoint. The first motor unit includes at least one motor of a first power, or small motor, having a shaft to which the output member is connected. The second motor unit includes at least one motor of a second power higher than the first power, or large motor, having a shaft rotationally connected to the output member via viscous coupler, and computer programmed, in response to a torque setpoint, to power the second motor unit so that the viscous coupler provides a viscous torque conforming to the torque setpoint. Further, in parallel with this, the first motor unit is powered so that it produces the additional torque between the torque setpoint and the viscous torque until the viscous torque reaches the value of the torque setpoint.

Abstract: A method of making a metal electrode on the surface of a hydrophobic material (7), the method comprising the steps of: [1] bringing one end of a capillary (5) containing a fluid that includes particles of metal dissolved in a solvent close to a zone of the surface of the material (7); and [2] illuminating said zone by means of laser radiation (3) so as to have the effects of causing a drop of fluid to flow from the capillary, of depositing the drop on the zone, of evaporating the solvent contained in the drop, and of annealing the metal particles on the surface of the material in order to form the electrode.

Abstract: The invention relates to a device for generating a torque on an output member in response to a torque setpoint, including a first motor unit including at least one motor of a first power, or small motor, having a shaft to which the output member is connected, a second motor unit including at least one motor of a second power higher than the first power, or large motor, having a shaft rotationally connected to the output member via viscous coupling means, and servo-control means programmed, in response to a torque setpoint (Msp), to power the second motor unit so that the viscous coupling means provide a viscous torque (Mvisc) conforming to the torque setpoint and, in parallel with this, to power the first motor unit so that it produces the additional torque between the torque setpoint and the viscous torque until the viscous torque reaches the value of the torque setpoint.