Abstract: The invention relates to a glazing used as projection screen operating in reflection, comprising a front face, onto which the image is projected, and a rear face. The glazing comprises a variable light scattering system comprising a functional film capable of switching between a transparent state and a scattering state and a coating comprising at least one mirror layer, said coating being separated from the front face at least by the functional film. The invention also relates to the use of a glazing as projection screen, to a projection system and to a projection method using said glazing.

Abstract: Method for viewing a laser spot included in a multispectral image representing an optical field composed of pixels including a plurality of components, the laser spot being produced by a laser pointer and having a wavelength taking values in a range of wavelengths dependent on operating temperatures of the laser pointer. The method includes: obtaining a multispectral image in which each component corresponds to the same instant of acquisition and represents a spectral band in a plurality of spectral bands covering continuously a spectral domain comprising said range of wavelengths; applying a contrast-accentuation procedure to a subpart of the multispectral image comprising the laser spot in order to obtain a subpart in which a contrast between the laser spot and a background is improved; and generating an image allowing display of the laser spot using information obtained following the application of said procedure.

Abstract: A system for injecting light, includes an optical coupler having: a lens having a convex entrance face of radial extent R1, a convex central exit face and a peripheral exit face; a cavity, containing the entrance face and with an entrance lateral surface; and a peripheral reflective surface, encircling the lens and the cavity, extending beyond the entrance face; an optical collector, with an entrance, a collecting surface facing the central exit face, and a numerical aperture NA smaller than 1, the collector including a jacket having an end surface; and a member for aligning the optical collector, the optical coupler and the aligning member being integrally formed or being indirectly or directly fastened together, the central distance eF on the axis Oz between the collecting surface and the central exit face being nonzero and smaller than 5 mm, and the system including a stop for the end surface.

Abstract: Method for viewing a laser spot included in a multispectral image representing an optical field composed of pixels including a plurality of components, the laser spot being produced by a laser pointer and having a wavelength taking values in a range of wavelengths dependent on operating temperatures of the laser pointer. The method includes: obtaining a multispectral image in which each component corresponds to the same instant of acquisition and represents a spectral band in a plurality of spectral bands covering continuously a spectral domain comprising said range of wavelengths; applying a contrast-accentuation procedure to a subpart of the multispectral image comprising the laser spot in order to obtain a subpart in which a contrast between the laser spot and a background is improved; and generating an image allowing display of the laser spot using information obtained following the application of said procedure.

Abstract: The present invention relates to an article having at least one colored luminous region, in particular a display, said article comprising at least one glass-ceramic substrate having a luminous transmission ranging from 0.8% to 40% and an optical transmission of at least 0.1% for at least one wavelength in the range extending from 420 to 780 nm, at least one light source and at least one inkjet filter of thickness comprised between 1 and 50 ?m, so as to form at least one colored luminous region, in particular a display, in at least one region of the glass-ceramic substrate.

Abstract: A system for injecting light, includes an optical coupler having: a lens having a convex entrance face of radial extent R1, a convex central exit face and a peripheral exit face; a cavity, containing the entrance face and with an entrance lateral surface; and a peripheral reflective surface, encircling the lens and the cavity, extending beyond the entrance face; an optical collector, with an entrance, a collecting surface facing the central exit face, and a numerical aperture NA smaller than 1, the collector including a jacket having an end surface; and a member for aligning the optical collector, the optical coupler and the aligning member being integrally formed or being indirectly or directly fastened together, the central distance eF on the axis Oz between the collecting surface and the central exit face being nonzero and smaller than 5 mm, and the system including a stop for the end surface.

Abstract: An article including at least one lighting zone, manufacture of the article, and a cooking apparatus including such an article when in a form of a glass-ceramic plate are described. The article includes at least one glass-ceramic substrate, and at least one light guide, the light guide coupled to at least one light source on one side outside of the lighting zone, and including, in the lighting zone, at least one mechanism of extracting radiation emitted by the light source.

Abstract: The present invention relates to an article having at least one luminous area, particularly for display purposes, particularly a white area, said article comprising at least one glass-ceramic substrate having a light transmission from 0.8% to 40% and an optical transmission of at least 0.10, at least at a wavelength within the range from 420 to 780 nm, at least one light source, particularly a light-emitting diode, having an emission peak at a wavelength between 430 and 490 nm, and at least one luminescent compound emitting in the area of the CIExyY (1931) three-color diagram delimited by the following coordinates (x, y): x 0.2658 0.2000 0.3000 0.4229 0.2658 y 0.7243 0.3950 0.3405 0.5756 0.7243 so as to form at least one luminous area, particularly a white area, in particular for display purposes, in at least one area of the plate.

Abstract: An article including at least one lighting zone, manufacture of the article, and a cooking apparatus including such an article when in a form of a glass-ceramic plate. The article includes at least one glass-ceramic substrate, and at least one light guide, the light guide coupled to at least one light source on one side outside of the lighting zone, and including, in the lighting zone, at least one mechanism of extracting radiation emitted by the light source.

Abstract: A luminous glazing unit includes a glass substrate, an additional element that is tinted an optical isolator between the glass substrate and the additional element, a light source, optically coupled to the glass substrate, and a light-extracting device associated with the glass substrate. The optical isolator includes a low-index film, made of fluoropolymer-based material which: has a refractive index n2 at 550 nm such that n1-n2 is at least 0.08, has a thickness e2 of at least 600 nm, is in optical contact with the first main face by a first lamination interlayer, based on a thermoplastic material.

Abstract: The present invention relates to an article having at least one luminous area, particularly for display purposes, particularly a white area, said article comprising at least one glass-ceramic substrate having a light transmission from 0.8% to 40% and an optical transmission of at least 0.10, at least at a wavelength within the range from 420 to 780 nm, at least one light source, particularly a light-emitting diode, having an emission peak at a wavelength between 430 and 490 nm, and at least one luminescent compound emitting in the area of the CIExyY (1931) three-color diagram delimited by the following coordinates (x, y): x 0.2658 0.2000 0.3000 0.4229 0.2658 y 0.7243 0.3950 0.3405 0.5756 0.7243 so as to form at least one luminous area, particularly a white area, in particular for display purposes, in at least one area of the plate.

Abstract: The present invention relates to an article having at least one colored luminous zone, in particular a display zone, said article comprising at least one glass-ceramic substrate having a luminous transmission ranging from 0.8% to 40% and an optical transmission of at least 0.1% for at least one wavelength in the range extending from 420 to 780 nm, at least one light source and at least one filter so as to form at least one colored luminous zone, in particular a display zone, in at least one zone of the plate.

Abstract: A system for injecting light, includes an optical coupler having: a lens having a convex entrance face of radial extent R1, a convex central exit face and a peripheral exit face; a cavity, containing the entrance face and with an entrance lateral surface; and a peripheral reflective surface, encircling the lens and the cavity, extending beyond the entrance face; an optical collector, with an entrance, a collecting surface facing the central exit face, and a numerical aperture NA smaller than 1, the collector including a jacket having an end surface; and a member for aligning the optical collector, the optical coupler and the aligning member being integrally formed or being indirectly or directly fastened together, the central distance eF on the axis Oz between the collecting surface and the central exit face being nonzero and smaller than 5 mm, and the system including a stop for the end surface.

Abstract: The present invention relates to an article having at least one colored luminous region, in particular a display, said article comprising at least one glass-ceramic substrate having a luminous transmission ranging from 0.8% to 40% and an optical transmission of at least 0.1% for at least one wavelength in the range extending from 420 to 780 nm, at least one light source and at least one inkjet filter of thickness comprised between 1 and 50 ?m, so as to form at least one colored luminous region, in particular a display, in at least one region of the glass-ceramic substrate.

Abstract: The invention relates to a glazing used as projection screen operating in reflection, comprising a front face, onto which the image is projected, and a rear face. The glazing comprises a variable light scattering system comprising a functional film capable of switching between a transparent state and a scattering state and a coating comprising at least one mirror layer, said coating being separated from the front face at least by the functional film. The invention also relates to the use of a glazing as projection screen, to a projection system and to a projection method using said glazing.

Abstract: The present invention relates to an article having at least one colored luminous zone, in particular a display zone, said article comprising at least one glass-ceramic substrate having a luminous transmission ranging from 0.8% to 40% and an optical transmission of at least 0.1% for at least one wavelength in the range extending from 420 to 780 nm, at least one light source and at least one filter so as to form at least one colored luminous zone, in particular a display zone, in at least one zone of the plate.

Abstract: An article including at least one lighting zone, manufacture of the article, and a cooking apparatus including such an article when in a form of a glass-ceramic plate. The article includes at least one glass-ceramic substrate, and at least one light guide, the light guide coupled to at least one light source on one side outside of the lighting zone, and including, in the lighting zone, at least one mechanism of extracting radiation emitted by the light source.

Abstract: In an optically controlled cold-cathode electron tube, the emitters 1, of nanometer and/or micron size and of elongate shape, have a structure comprising a first material (4) of sp2-bonding carbon type and a metallic second material (3), said first material being in contact with and surrounding said second material at its top and over the entire length of the emitter or at least part of said length starting from its top toward the base (b). The second material has a plasma frequency substantially equal to or greater than the frequency of the optical control wave.

Abstract: In an optically controlled cold-cathode electron tube, the emitters 1, of nanometer and/or micron size and of elongate shape, have a structure comprising a first material (4) of sp2-bonding carbon type and a metallic second material (3), said first material being in contact with and surrounding said second material at its top and over the entire length of the emitter or at least part of said length starting from its top toward the base (b). The second material has a plasma frequency substantially equal to or greater than the frequency of the optical control wave.