Safran Electronics & Defense

Arnaud Davenel

Michel Jouffroy

David Roberfroid

Emmanuel Robert

Cédric Ollagnier

Georges-Olivier Reymond

Benjamin Deleaux

Bernard Ruocco-Angari

Eric Robert-Charrerau

Yannick Guerin

Corentin Dubois

Vincent Fraysse

Landry Chopin

Flavien Roland

Romain Ferquel

Sébastien Vial

Bruno Toulon

Daniel Marie

Quentin Guillerm

Sebastien Vial

Cedric Ollagnier

Stephane Alliot

A multispectral harmonisation device intended to align the optical channels of an optronic system that includes at least two directional optical sources emitting respective optical beams of various wavelengths belonging to various spectral bands and comprises a parabolic mirror and means for positioning and orienting each of the optical sources so that each of the optical beams emitted by the optical sources passes through the optical focus of the parabolic mirror before being reflected by said parabolic mirror so that all the optical beams form, by reflection on the parabolic mirror, a multispectral collimated beam.

Multispectral harmonisation device intended for aligning the optical channels of an optronic system

The invention relates to an image sensor comprising: &#x2022;an optical system () for receiving an optical signal; &#x2022;a Bayer matrix () located on the image focal plane of the optical system (), the Bayer matrix () comprising: a reference optical filter (B) configured to eliminate or attenuate, in the received optical signal, a first band of wavelengths and to allow through, in the received optical signal, a second band length of wavelengths, and also eight optical filters adjacent to the reference optical filter (B); &#x2022;a phase mask () arranged on a pupil () of the optical system () and configured to selectively project at least 98% of the energy of the optical signal carried in the first band of wavelengths and 98% of the energy of the optical signal carried in the second band of wavelengths on the reference optical filter (B) and on at least one adjacent optical filter, which is configured to allow through, in the received optical signal, the first band of wavelengths.

Bayer matrix image sensor

An optical detection device is included in a self-guided flying vehicle, the self-guided flying vehicle being composed of a cone located at the head of the self-guided flying vehicle, a propulsion device located at the rear of the self-guided flying vehicle and a body located between the cone and the propulsion device. The optical detection device includes at least two portholes disposed in a collar on the periphery of the body of the self-guided flying vehicle.

Optical detection device of a self-guided flying vehicle

An optical radiation-collecting assembly includes a convex mirror, a concave mirror with a central opening and a window, arranged such that light passes through the opening in the concave mirror, is reflected first by the convex mirror and then by the concave mirror, and subsequently passes through the window. The optical assembly is suitable for use in a homing device for guiding a rocket, preventing an optical input component of such a device from being damaged and rendered inoperative from abrasion when exposed to a high-speed air flow containing dense particles. The optical assembly also includes an image-forming function.

Optical radiation-collecting assembly for a homing device for guiding a rocket

An infra-red imaging device comprising: a cryostat (), an infra-red detector () arranged inside the cryostat () to receive an optical signal coming from outside the imaging device, a linear polarizer configured to polarize the optical signal along a variable direction of polarization, before the optical signal reaches the infra-red detector (), the linear polarizer comprising: a first polarizing element () arranged outside the cryostat () and movable in rotation with respect to the cryostat (), and a second polarizing element () arranged inside the cryostat () between the first polarizing element () and the infra-red detector () and fixed with respect to the cryostat ().

Infrared imaging device

The invention relates to a proximal monitoring device comprising a ring defining a volume in which a plurality of cameras is mounted. The cameras have fields that are angularly distributed around said ring and at least one of the cameras is associated with a device for scanning azimuthally in a plane normal to a central axis of the ring.

Proximal monitoring device

Device for tracking a target, the device comprising an optical system and a quadrant photodetector, wherein the optical system is configured to project a light beam coming from the target at one spot on at least one of the quadrants, and the photodetector is configured to estimate a current position of the spot by weighting of light energies received by the quadrants. The optical system comprises an optical device configured, when the spot is entirely contained in only one of the quadrants, to enlarge the spot. The invention also relates to a tracking method likely to be implemented by this tracking device.

Target tracking device comprising a photodetector with quadrants

The invention concerns a device () for locating a target, comprising: &#x2014;a camera () that can be oriented in an orientation in view of the target so that the camera acquires an image of the target, and an orientation in view of a star so that the camera acquires at least one image of the star, &#x2014;an inertial unit () configured to calculate position and orientation data of the camera (), &#x2014;a resetting module () configured to a apply stellar resetting to the data on the basis of the image of the star, in order to produce reset data, &#x2014;a location module () configured to estimate a position of the target (T) from the image of the target (T) and the reset data, &#x2014;a communication interface for communicating with an operator station, the camera () passing from one orientation to the other in response to the reception, by the interface, of a command sent by the operator station.

Device for locating a target by stellar correction, intended to be on board a mobile carrier

A detection and locating device comprising a plurality of optical sensors (Q, Q, Q, Q) having fields that together define the field of the detection and locating device, each sensor having a plurality of photodiodes having fields that together define the field of the sensor, the sensors being connected to a control unit () in such a manner that each sensor supplies a first signal corresponding to the sum of the signals from at least two of the photodiodes.

Locating and detecting device comprising a plurality of photodiodes

An electromagnetic-radiation detection system is equipped with an electromagnetic-radiation sensor, which has a plurality of detectors sensitive to electromagnetic radiation, allowing images composed of pixels to be obtained, each pixel being represented by at least one value issuing from at least one detector of the sensor. These sensors should generally be cooled. Because of dispersion of the individual responses of each detector of a sensor, each detector of said sensor is calibrated for gain and offset value. A calibration of a detector includes acquiring at least two values issuing from said detector in order to estimate a gain and an offset value to be applied to the values issuing from said detector. A bandpass electromagnetic-radiation filter may have a predefined transmission coefficient in said system in order to vary the electromagnetic radiation reaching said sensor and thus to obtain, for each detector, the two values necessary for implementing calibration.

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Boulogne-Billancourt, France

Arnaud Davenel