Thomson-csf

Thales

Thales Deutschland Gmbh

Université Pierre Et Marie Curie (paris 6)

Université Des Sciences Et Technologies De Lille

In-idt

Brigitte Loiseaux

Jean-Pierre Huignard

Cecile Joubert

Claude Puech

Christophe Nicolas

Mane-Si Laure Lee-Bouhours

Anne Delboulbe

Jean-Claude Lehureau

Philippe Robin

Michel Papuchon

Claude Bricot

Jean Pierre Huignard

Cécile Joubert

Gaëlle Lehoucq

Jean Claude Dubois

Pierre Tournois

Daniel Dolfi

Jean Chazelas

C&eacute;cile Joubert

Erich Spitz

Jean-Luc Reverchon

Jean-Paul Castera

Arnaud Brignon

Romain Czarny

Philippe Refregier

Christian Renard

Gérard Berginc

Armand Eranian

Thierry Dousset

Jérôme Bourderionnet

Christian Larat

Shailendra Bansropun

Charlotte Tripon-Canseliet

Jean P Herriau

Henri Rajbenbach

Pascal Joffre

Michel Pate

Francedillaois Le Carvennec

Frédéric Diaz

Alfred Warmuth

Horst Joestingmeier

Henri Raobenbach

Didier Decoster

Andreas Oppenlander

Jean-Francois Allaeys

Jean-Christophe Chanteloup

Jean-Pierre Ganne

Cindy Bellanger

Gauthier H De Monchenault

Mane-Si-Laure Lee Bouhours

Michel Garcia

Antoine Brus

Vincent Magnin

Jean-François Goudou

Nadège LEMPÉRIÈRE

Sandra CRÉMER

Anne Delboulbe-Fortas

Michaël Fagno

Jean-François Allaeys

El Hadj Dogheche

A photovoltaic module comprises at least one photovoltaic cell and one concentration optic device, to be illuminated by a light flux emitting at at least one illumination wavelength belonging to a band of wavelengths defined by a minimum wavelength and a maximum wavelength, the band of wavelengths being that of the solar radiation of the order of [380 nm-1600 nm]. The concentration optic device is a monolithic component and comprises at least one diffractive structure comprising subwavelength patterns, defined in a structured material; the patterns having at least one dimension less than or equal to the average illumination wavelength divided by the refractive index of the structured material; the patterns being separated from one another by subwavelength distances, defined between centres of adjacent patterns; the concentration optic device ensuring at least one focusing function and one diffraction function. A solar panel comprising the photovoltaic module is also provided.

Photovoltaic module comprising a concentration optic with subwavelength patterns and solar generator for satellite comprising said module

A wideband diffractive component diffracting an incident beam exhibiting a wavelength in a diffraction spectral band is provided. The diffractive component elementary areas are arranged on a surface, each area belonging to a type indexed by an index i lying between 1 and n, with n greater than 1, corresponding to blaze wavelength &#x3bb;i of index i, the blaze wavelengths lying in the diffraction spectral band. An elementary area of type i includes microstructures sized less than 1.5 times the blaze wavelength of index i, arranged to form an artificial material exhibiting an effective index variation where an elementary area of type i constitutes a blazed diffractive element at the blaze wavelength &#x3bb;i of index i, the different values of the blaze wavelengths and the proportion of surface area occupied by the areas of a given type a function of a global diffraction efficiency desired in the diffraction spectral band.

Wide spectral band subwavelength diffractive component

A configurable deflection system for an incident microwave frequency beam exhibiting a wavelength contained in a band of wavelengths corresponding to the microwave frequencies, comprising: a first and a second diffractive dielectric component suitable for each performing a rotation about a rotation axis Z, the deflection system being suitable for generating a microwave frequency beam by diffraction of the incident microwave frequency beam on the first and second components, the microwave frequency beam being oriented according to an angle that is a function of the angular positioning between the first and said second diffractive components, the first and second components respectively exhibiting a first and second periodic structure of first and second periods according to a first and second axis, the first and second structures respectively comprising a plurality of first and second primary microstructures formed respectively on a first and second substrate of first and second substrate refractive indices.

Configurable microwave deflection system

A traffic light luminaire includes at least one light source, a collimating device for collimating light emitted by the at least one light source, and a light distribution device for spreading the collimated light within a specific solid angle with a specific luminous intensity distribution. The light source is a high brightness light source, and the light distribution device is a microstructured distributor having a micro-structured surface, wherein each equal-sized macroscopic section of the microstructured distributor contributes to the luminous intensity distribution in the same way within said whole specified solid angle. Thereby a low maintenance traffic light luminaire is provided which generates a homogeneous light distribution for a variety of trail arrangements (right curve, left curve, straight line) independent of the distance of the viewer.

Universal traffic light luminaire

An optronic porthole comprises a substrate with two faces. It comprises on one of the faces of the substrate or on both faces, a stack of several hetero-structures, each hetero-structure being composed of at least two semi-conducting layers SC1, SC2, the layer SC1 being doped, the layer SC2 itself comprising a two-dimensional electron gas layer formed at the interface with the layer SC1. It furthermore comprises an electrode in contact with all the electron gas layers, a bi-periodic metallic grid buried in the stack, in contact with the electrode. The substrate and the layers are transparent in the 0.4 &#x3bc;m-5 &#x3bc;m band.

Optronic window transparent to IR and reflecting RF

A lens antenna including at least one diffractive dielectric component capable of shaping a microwave frequency wave front having a wavelength comprised in a range from 1 millimeter to 50 centimeters, said diffractive dielectric component including a plurality of main microstructures formed in a substrate material with a substrate refractive index so as to form an artificial material of an effective refractive index, each main microstructure having a size of less than a target wavelength taken from said range of wavelengths, said main microstructures being laid out per zones, so as to make a surface filling level vary, the effective refractive index being a function of said surface filling level, the layout being such that the effective refractive index varies inside said one zone of said diffractive dielectric component quasi monotonously between a minimum value and a maximum value less than or equal to the substrate refractive index.

Antenna lens comprising a dielectric component diffractive suitable shaping a wavefront microwave

The present invention relates to a process for fabricating light-emitting device. More particularly, the aim of the invention is to allow the fabricating of light emitters with improved efficiency by using artificial materials, enabling antireflection or high-reflectivity treatments to be carried out. For this purpose, subwavelength structures are etched on one of the ends of an emissive cavity, enabling external face to be controlled. The invention applies to any light emitter, and therefore notably to lasers and more particularly still to QCLs (quantum cascade lasers). Moreover, the fabrication process according to the invention is preferably a wafer-scale process.

Optimized process for fabricating light-emitting devices using artificial materials

A document includes at least one drawing or data produced, for example, by printing. In addition, this document includes a hologram representing part of the document. The hologram of this document is recorded using a system including a prerecorded or electrically controllable optical modulator in which the image of at least part of the document is recorded. This modulator is designed to be combined with a layer of photosensitive material. A first reference wave illuminates the layer of photosensitive material. A second wave incident on the modulator and giving rise to a third object wave is also transmitted to the layer of photosensitive material in order to interfere with the reference wave in this layer.

Secured document, system for manufacturing same and system for reading this document

Color display system, which includes an electrooptic modulation screen (LCD) and in which a chromatic modulator (RC) is provided between the multiple-wavelength light source (S, C) and the screen (LCD). This chromatic modulator modulates a wavelength or a restricted range of wavelengths of the source in order to adjust the saturation of the various primaries transmitted to the screen as well as to effect colorimetric balance. Applications include liquid-crystal color displays.

Illumination system for an electrooptic color display screen

A holographic projection screen for large screen projection and back projection with a liquid crystal projector. The screen includes at least one layer made of a photosensitive material in which at least one index grating may be recorded by an interference of an optical recording wave with an optical object wave. The thickness of the layer is equal to or greater than n,&Lgr;,/2&pgr;, where n,is the average index of the photosensitive material, &Lgr; is the average spacing of the index grating and &lgr; is the recording wavelength.

Holographic projection screen and method of production

A compact illumination device intended especially for illuminating an active matrix in a monochromatic or trichromatic display device. This device includes a source and collimating device in order to deliver a lighting direction from the source along a direction (Dy) and two optical components (M,) and (M,) which anamorphose the lighting in a direction parallel to the direction (Dy) and in a direction (Dz) perpendicular to the direction (Dy), respectively. These components may typically be of the holographic grating type operating in transmission or in reflection.

Compact lighting device

Display device and flat television screen using this device

An illumination device comprises a light source coupled to a waveguide. the waveguide comprises a diffracting element capable of diffracting emergent light rays coming from the source, in a direction substantially perpendicular to the surface of the waveguide. A device of this kind is particularly well-suited to transmissive display screens of the liquid crystal display screen type. It can generate a highly collimated, polarized light.

Illumination device and application thereof to the illumination of a

A system for the control of light beams includes a beam splitter placed on the path of the beam to be controlled and deriving a measurement beam from this beam; a detection device receiving the measurement beam and measuring the shape of the wave front of the measurement beam; a wave-front shape correction device placed on the path of the beam to be controlled, activated by the detection device and correcting the shape of the wave front of the beam to be controlled. The detection device includes a light spatial modulator providing for the selective transmission of the portions of the measurement beam; a focusing device receiving the different portions of the measurement beam; a series of photodetectors placed along the focusing plane of the focusing device; a device for the identification of the photodetector or photodetectors, detecting a light wave and computing the shape of the wave front as a function of the photodetectors identified.

System for correction the shape of a wave-front of a laser beam

Growing community of inventors

Bures sur Yvette, France

Brigitte Loiseaux