Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Isorg

Commissariat a L'energie Atomique Et Aux Energies Alternatives

Anis Daami

Laurent Frey

Mohammed Benwadih

Philippe Capron

Josep Segura Puchades

Stéphane Fanget

Marianne Consonni

Jamal Tallal

Jean-Marie Verilhac

Vincent Faucheux

Simon Charlot

Frédéric Sermet

David Alincant

The invention relates to a LIDAR imaging system of the FMCW type, comprising a light source (), an optical projection device (), an optical transmission device (), an optical imaging device (), and a matrix photodetector (). It further comprises a phase correction device () comprising a spatial phase modulator () for applying a corrected spatial phase distribution to the reference signal, and a computation unit () for determining the corrected spatial phase distribution, by taking into account a spatial distribution representing a spatial intensity distribution of the backscattered object signal, so that the reference signal has a corrected spatial intensity distribution in the reception plane optimizing a spatial distribution of a parameter of interest representing the heterodyne signal.

LIDAR imaging system with FMCW type heterodyne detection comprising a device for correcting the phase of the reference signal

A detection device for a coherent lidar imaging system includes an integrated detector comprising a matrix array of pixels distributed over N columns and M rows and comprising an optical guide, called reference guide, configured so as to receive a laser beam, called reference beam, N optical guides, called column guides, coupled to the reference guide, each column guide being coupled to M optical guides, called row guides, the M row guides being configured so as to route part of the reference beam into each pixel of the column, called pixel reference beam, each pixel of the integrated detector comprising: a guided photodiode coupled to an optical detection guide, a diffraction grating, called pixel grating, configured so as to couple a portion of a beam illuminating the pixel into the guided photodiode, a coupler, called pixel coupler, configured so as to couple the pixel coupled beam and at least a fraction of the pixel reference beam into the detection guide, an electronic readout and preprocessing circuit.

Detection device and associated lidar system

A detection device for a coherent imaging system includes a detector comprising a matrix array of pixels, each pixel comprising a photodetector component having a photosensitive surface, the detector being designed to be illuminated by a coherent beam, called the image beam consisting of grains of light called speckle grains, a matrix array of transmissive deflecting elements configured to be individually orientable by means of an electrical signal, so as to deflect a fraction of the image beam incident on the group, and thus modify the spatial distribution of the speckle grains in the plane of the photosensitive surface, each group of one or more pixels further comprising a feedback loop associated with the deflecting element and configured to actuate the deflecting element so as to optimize the signal-to-noise ratio from the light detected by the one or more photodetector components of the group of pixels, the feedback loop comprising a feedback circuit.

Detector with deflecting elements for coherent imaging

The invention relates to a directional lighting device () which comprises:

Directional lighting device

A method of adapting light extraction LEE from at least one light emitting diode with surface area S and perimeter P includes a step to encapsulate the light emitting diode with an encapsulation layer with a refraction index N, the refraction index N being determined based on a model taking account of an internal quantum efficiency of the light emitting diode. The extraction of light resulting from use of the encapsulation layer is such that the light emitting diode can achieve a predetermined external quantum efficiency.

Method of adapting light extraction from a light emitting diode

A photoresistor comprises two electrodes connected by a photosensitive layer of the photoresistor, and at least one additional layer which is in contact with the photosensitive layer in order to influence the behavior of the photoresistor regarding carrier collection between the two electrodes, in order to improve the sensitivity of the photoresistor.

Photoresistor with improved sensitivity

A matrix-array detecting device including a stack comprising a matrix array of detecting-element pixels, and an active matrix array comprising a network of rows and columns for controlling the pixels and produced on the surface of a substrate, wherein the detecting-element pixels comprise: a common top electrode; a detecting layer; and discrete bottom electrodes; the device comprising a metallic mesh that is connected to the top electrode; that includes pads comprising at least one metal portion, the pads being incorporated into the detecting layer; and that is positioned in correspondence with the network of controlling rows and columns. A process for fabricating the matrix-array detecting device is also provided.

Matrix detection device incorporating a metal mesh in a detection layer, and manufacturing method

A device intended to generate electricity includes a planar fuel cell having: cells each provided with an anode and a cathode associated with a membrane, and a first face and a second face opposite to the first face, the first face being arranged on the side with the anodes of the fuel cell and the second face being arranged on the side with the cathodes of the fuel cell. Furthermore, this device includes a system configured to generate a first air flow intended to cooperate thermally with the first face, and configured to generate a second air flow intended to cooperate with the second face to ensure the supply of oxidizer to the cathodes of the fuel cell.

Device intended to generate electricity from a planar fuel cell cooled by air flow

An organic photodetector comprising a first electrode (to) that is plane and formed on a substrate (to) that is plane, a convex active layer (to) formed on the first electrode, and a second electrode (to) formed on the active layer, means for concentrating light radiation in the active layer being incorporated in the photodetector.

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Grenoble, France

Anis Daami