Abstract: A system to localize a micro-device inside a target body part, including: a micro-device remotely steered and controlled from outside the target body part, a control unit including a memory for storing one ultrasound image of the target body part, one probe being brought in contact with a securing body part of the patient, and at least one tracker connected to the micro-device. The probe and the tracker communicate with ultrasounds, the control unit being thus able to localize, in real time, the tracker within an internal referential defined with regards to the probe, and the control unit displays, on a screen, the ultrasound image and displays, in real time, the localization of the micro-device on the ultrasound image.

Abstract: A signal tracking system including: one fixation element to be secured to a rigid body part of the patient surrounding a target body part, the fixation element further including a mapping element, one tracker element to be secured to the fixation element to track, in real time, the internal tracker, and a control unit including a memory to store an internal referential and one image displaying the target body part and one fixation element. The control unit is designed to define, inside the internal referential, at least one 3D frame position attached to the at least one fixation element, and to precisely locate each point of the target body part, the control unit is further designed to precisely localize, in real time, the internal tracker inside the target body part.

Abstract: The present invention relates to a device (IO) for controlling the axial position of a laser focal point produced by a microscope objective, comprising: —a laser source for emitting a laser beam, —a deformable mirror for focusing or defocusing the laser beam axially, —a microscope objective for focusing the laser beam coming from the deformable mirror on a laser focal point, characterized in that it further comprises a system for passing the laser beam emitted by the laser source several times through the deformable mirror.

Abstract: The present invention relates to a device for determining the position of a plurality of objects that are simultaneously trapped by a single laser beam, characterized in that the device comprises:—a laser source for emitting a laser beam, an actuation system for a three-dimensional deflecting of the laser beam between several trapping points,—a microscope objective for focusing the laser beam coming from the actuation system on the trapping points,—a sample chamber including the objects to be trapped on the trapping points,—a light source for lighten the sample chamber, and—a camera for determining the position of each of the trapped objects, said camera being located between the laser source and the actuation system, so that the light emitted by the light source passes successively through the sample chamber, the microscope objective, the actuation system and the camera.

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: 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: A mechatronic device includes two arms extending from a base in a first direction and shaped to be handheld by an operator, the two arms having free ends forming a gripper and arranged to move closer together by rotation from a rest position to an active position, a motor housed in the base, an actuator mounted between the arms, and a means for controlling said actuator, the actuator connected to the motor so as to be driven in movement in translation in the first direction. The actuator also has a first contact surface that forms a cam with a respective second contact surface on each arm, the first contact surface remaining engaged with the second contact surface. The control means controls the movement in translation of the actuator to produce a movement in rotation of the arms that applies a chosen force of the gripper in its active position.

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: A touch interface includes a display screen and detects an approach and a position of a user's finger with respect to the screen. The interface displays at least one first graphical element associated with a first touch selection zone and lying in a first region and at least one second graphical element superimposed on a second touch selection zone, and lying in a second region distinct from the first region. The interface estimates a trajectory of a point of the finger and a point of impact of the trajectory on the screen. The interface displaces, when the point of impact is detected in one of the regions, the graphical element of the region and the associated touch selection zone in the direction of the point of impact, and then, when the point of impact exits the region, restore the display of the graphical element to an initial state.

Abstract: A mechatronic device includes two arms extending from a base in a first direction and shaped to be handheld by an operator, the two arms having free ends forming a gripper and arranged to move closer together by rotation from a rest position to an active position, a motor housed in the base, an actuator mounted between the arms, and a means for controlling said actuator, the actuator connected to the motor so as to be driven in movement in translation in the first direction. The actuator also has a first contact surface that forms a cam with a respective second contact surface on each arm, the first contact surface remaining engaged with the second contact surface. The control means controls the movement in translation of the actuator to produce a movement in rotation of the arms that applies a chosen force of the gripper in its active position.

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 touch interface includes a display screen. The interface detects an approach and a position of a finger of a user with respect to the screen. The interface displays on the screen at least one graphical element associated with a touch-selection zone, surrounding an anchor point of the graphical element on the screen. The interface estimates a trajectory of a point of the finger and an impact point of the trajectory on the screen, and moves the graphical element in the direction of the impact point, when a distance between the anchor point and the impact point falls below a first threshold.

Abstract: Asynchronous information is provided by a sensor having a matrix of pixels disposed opposite the scene. The asynchronous information includes, for each pixel of the matrix, successive events originating from this pixel, that may depend on variations of light in the scene. A model representing the tracked shape of an object is updated after detecting events attributed to this object in the asynchronous information. Following detection, the updating of the model includes an association of a point of the model with the event detected by minimizing a criterion of distance with respect to the pixel of the matrix from which the detected event originates. The updated model is then determined as a function of the pixel of the matrix from which the detected event originates and attributed to the object and of the associated point in the model, independently of the associations performed before the detection of this event.

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 touch interface includes a display screen. The interface detects an approach and a position of a finger of a user with respect to the screen. The interface displays on the screen at least one graphical element associated with a touch-selection zone, surrounding an anchor point of the graphical element on the screen. The interface estimates a trajectory of a point of the finger and an impact point of the trajectory on the screen, and moves the graphical element in the direction of the impact point, when a distance between the anchor point and the impact point falls below a first threshold.

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 touch interface includes a display screen and detects an approach and a position of a user's finger with respect to the screen. The interface displays at least one first graphical element associated with a first touch selection zone and lying in a first region and at least one second graphical element superimposed on a second touch selection zone, and lying in a second region distinct from the first region. The interface estimates a trajectory of a point of the finger and a point of impact of the trajectory on the screen. The interface displaces, when the point of impact is detected in one of the regions, the graphical element of the region and the associated touch selection zone in the direction of the point of impact, and then, when the point of impact exits the region, restore the display of the graphical element to an initial state.

Abstract: Asynchronous information is provided by a sensor having a matrix of pixels disposed opposite the scene. The asynchronous information includes, for each pixel of the matrix, successive events originating from this pixel, that may depend on variations of light in the scene. A model representing the tracked shape of an object is updated after detecting events attributed to this object in the asynchronous information. Following detection, the updating of the model includes an association of a point of the model with the event detected by minimizing a criterion of distance with respect to the pixel of the matrix from which the detected event originates. The updated model is then determined as a function of the pixel of the matrix from which the detected event originates and attributed to the object and of the associated point in the model, independently of the associations performed before the detection of this event.

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.