Hologram Industries

Surys

Université Jean-monnet

Csem Centre Suisse D'electronique Et De Microtechnique Sa&#x2014;recherche Et D&#xe9;veloppement

Université Jean Monnet De Saint-etienne

Alexandre Noizet

Harald Walter

Hugues Souparis

Valéry Petiton

Yves Jourlin

Jean Sauvage-Vincent

Jean-Louis De Bougrenet

Emilie Bialic

Valery Petiton

Angélique Luu-dinh

According to one aspect, the invention relates to a customizable document for producing a customized security document (). The customizable document includes, according to an alternative: a layer () which can be customized by contact-free writing an opaque customization mask that is transparent in at least one transparency area (); a first multilayer film () arranged on a first side of the customizable layer (), including a layer having a high refractive index and encapsulated between two layers having a low refractive index, and structured over at least a portion of the surface thereof such as to form a first subwavelength array, characterized by a first array vector, such that the first multilayer film acts at zero order as a wavelength subtractive filter; a second multilayer film () arranged on a second side of the customizable layer, opposite the first side, including a layer having a high refractive index and encapsulated between two layers having a low refractive index, and structured over at least a portion of the surface thereof such as to form a second subwavelength array characterized by a second array vector, such that the second multilayer film acts at zero order as a wavelength subtractive filter, the first and second arrays being at least partially stacked.

Customizable document for producing a security document, customized security document and production of such a security document

According to one aspect, the invention relates to an optical safety component having a plasmonic effect intended to be observed by transmission, including two layers () made of a transparent dielectric material, a metal layer () that is arranged between said layers made of dielectric material to form two dielectric-metal interfaces (), and is structured to form on at least a portion thereof corrugations () that are capable of coupling surface plasmon modes supported by said dielectric-metal interfaces with an incident light wave. The corrugations are arranged in a first coupling area in a first main direction and in at least one second coupling area separate from said first coupling area, in a second main direction that is substantially perpendicular to said first main direction, said metal layer being continuous on each one of said coupling areas.

Optical safety component having a transmissive effect, manufacture of such a component, and secure document provided with such a component

An optical authentication component visible in reflection having a structure imprinted on a substrate of index n, a thin layer, made of a dielectric material having a refractive index n, deposited on the structure, and a layer made of a material having an index nsimilar to n, encapsulating the structure coated with the thin layer, is disclosed. The structure has a first pattern modulated by a second pattern, the first pattern is a bas-relief with an array of facets, having shapes which are defined to simulate an image in relief of an object in relief, and the second pattern is a periodic grating that modulates the first pattern which produces, after the thin layer has been deposited and the structure has been encapsulated, a first color at a first viewing angle and a different second color at a second viewing angle, obtained by azimuthal rotation of the component.

Optical authentication component and method of fabricating said component

The present invention relates to an optical security marking component producing a first visible configuration when observed through a polarizer oriented in a first orientation, and a second configuration, separate from the first, visible when observed through the polarizer oriented in a second orientation, the optical component comprising a stamped film for forming at least two diffraction gratings having different orientations, characterized in that each of said gratings has a period of less than 550 nm and a modulation between 0.25 and 0.5 relative to a reference plane.

Optical security marking component, method of manufacturing such a component, system comprising such a component, and reader for checking such a component

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Bussy Saint Georges, France

Alexandre Noizet