Commissariat a L'energie Atomique Et Aux Energies Alternatives

Commissariat a L'energie Atomique

Renault S.a.s.

Centre National De La Recherche Scientifique

Stéphane Getin

Umberto Rossini

Delphine Neel

Salim Boutami

Bérangère Hyot

Françoise Vinet

Patrick Chaton

Pierre Joly

Pierre Ferret

David Alleysson

Salim Mimouni

Bernard Aventurier

Pierre Barritault

Aurélien Suhm

Frédéric Sermet

Jérôme Dias

Henry Doyeux

Martin Pertenais

Stéphane Regnier

Gergely-Istvan Papp

Sébastien Giudicelli

The invention relates to a diffuserintended to be facing a light sourcecomprising a transmission layerand a diffusion layerintended to diffuse a light transmitted by the light source, the diffuser being characterised in that the diffusion layer comprises a plurality of metal structures, called metal nanostructures, having dimensions less than a wavelength of the light transmitted, said metal nanostructures having varied sizes and being distributed within the diffusion layer such that adjacent metal nanostructures have between them, varied distances and preferably less than the wavelength of the light transmitted. The invention also relates to a method for manufacturing such a diffuser, and a display system comprising such a diffuser.

Diffusive structure for light source

The invention concerns a head-up display, comprising at least one combination of a laser source, a movable mirror, a fixed mirror, a diffuser and an optical sub-system, the movable mirror being positioned to divert the beam originating from the laser source towards the fixed mirror in such a way that the beam from the fixed mirror scans the surface of the diffuser before reaching the optical sub-system.

Head-up display

The invention relates to a head-up display including an element () suitable for overlaying a first image of a scene () on a second image from a projection system, the projection system including a screen () and an optical system (), the screen () being divided into sub-screens (A,B,C), each of which display the second image, the optical system () including a set of optical subsystems (A,B,C) positioned opposite each sub-screen (A,B,C), the screen being positioned within the object focal plane of each optical sub-system (A,B,C).

Compact head-up display having a large exit pupil

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.

Rear-projection display device

A method for calculating a depth map from an original matrix image, comprising the steps of: calculating a first matrix image corresponding to the original matrix image with a low resolution and in which the depth of field is similar to that of the original matrix image, calculating a second matrix image corresponding to the original matrix image with a low resolution, comprising a number of pixels similar to that of the first matrix image and in which the depth of field is greater than that of the original matrix image, implementing a DFD type three-dimensional reconstruction algorithm from the first and the second matrix images, outputting the depth map.

Method and device for calculating a depth map from a single image

A method of formation of nanowires at a surface of a substrate attached to a solid immersion lens. The method includes formation of a catalyst element at the surface of the substrate and growth of nanowires from the catalyst element formed at the surface of the substrate. The catalyst element is a metal nanoparticle and the formation of the catalyst element at the surface of the substrate deposits the metal nanoparticle using a light beam focused by the solid immersion lens at the surface of the substrate.

Method of formation of nanowires and method of manufacture of associated optical component

A device for trapping particles contained in a liquid (L) placed in a tank, characterized in that it comprises a substrate that is transparent at a working wavelength, a thin layer of material with non-linear optical properties that are reversible at the working wavelength and which is fixed to a first face of the transparent substrate to form all or part of at least one wall of the tank, a device for forming an optical trap which comprises a laser source which emits a laser beam and means for forming a waist of the laser beam, the laser beam being incident upon that face of the transparent substrate that lies on the opposite side to the first face and the waist of the laser beam being formed in the thin layer, an evanescent electromagnetic field forming at the surface of the thin layer.

Device for trapping particles

The invention concerns a device for enhancing fluorescence comprising a support () carrying fluorescence enhancement means (), the fluorescence enhancement means offering a reception surface for chemical or biological elements intended to be read by detection of a fluorescence signal emitted by a fluorophore, associated with the chemical or biological elements, under the effect of an excitation light beam. The fluorescence enhancement means () is made up of a thin, transparent, dielectric layer or a stack of thin, transparent, dielectric layers (to) ensuring a mirror function for the fluorescence signal and excitation light beam, the material of the thin layer or of each thin layer of the stack being chosen from among the following materials: TiO, TaO, HfO, ZrO, MgO, SiO, SiN, MgFand YF. The fluorescence enhancement device may be used for a biological or chemical optic sensor.

Device for enhancing broad band fluorescence with low loss and biological or chemical optic sensor using the same

Growing community of inventors

Grenoble, France

Stéphane Getin