WO2014106584A1 - Holographic signalling system comprising a unit for generating at least one holographic image - Google Patents

Holographic signalling system comprising a unit for generating at least one holographic image Download PDF

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Publication number
WO2014106584A1
WO2014106584A1 PCT/EP2013/077258 EP2013077258W WO2014106584A1 WO 2014106584 A1 WO2014106584 A1 WO 2014106584A1 EP 2013077258 W EP2013077258 W EP 2013077258W WO 2014106584 A1 WO2014106584 A1 WO 2014106584A1
Authority
WO
WIPO (PCT)
Prior art keywords
holographic
light
guide plate
light guide
plate
Prior art date
Application number
PCT/EP2013/077258
Other languages
French (fr)
Inventor
Bernard Bavoux
David BARAT
Yida WEN
Béatrice Dagens
Original Assignee
Peugeot Citroen Automobiles Sa
Centre National De Recherche Scientifique
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Peugeot Citroen Automobiles Sa, Centre National De Recherche Scientifique filed Critical Peugeot Citroen Automobiles Sa
Priority to CN201380069784.7A priority Critical patent/CN105431786A/en
Priority to EP13814887.9A priority patent/EP2941672A1/en
Publication of WO2014106584A1 publication Critical patent/WO2014106584A1/en

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/22—Processes or apparatus for obtaining an optical image from holograms
    • G03H1/2286—Particular reconstruction light ; Beam properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
    • B60Q1/50—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating other intentions or conditions, e.g. request for waiting or overtaking
    • B60Q1/525—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating other intentions or conditions, e.g. request for waiting or overtaking automatically indicating risk of collision between vehicles in traffic or with pedestrians, e.g. after risk assessment using the vehicle sensor data
    • B60Q1/535—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating other intentions or conditions, e.g. request for waiting or overtaking automatically indicating risk of collision between vehicles in traffic or with pedestrians, e.g. after risk assessment using the vehicle sensor data to prevent rear-end collisions, e.g. by indicating safety distance at the rear of the vehicle
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/04—Processes or apparatus for producing holograms
    • G03H1/0402—Recording geometries or arrangements
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/04—Processes or apparatus for producing holograms
    • G03H1/0402—Recording geometries or arrangements
    • G03H1/0408—Total internal reflection [TIR] holograms, e.g. edge lit or substrate mode holograms
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/22—Processes or apparatus for obtaining an optical image from holograms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
    • B60Q1/50—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating other intentions or conditions, e.g. request for waiting or overtaking
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0028—Light guide, e.g. taper
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H2223/00—Optical components
    • G03H2223/16—Optical waveguide, e.g. optical fibre, rod

Definitions

  • the present invention relates to a holographic signaling system comprising a unit for generating at least one holographic image, to perform a signal that can be seen by an observer.
  • this holographic system is adapted to the signaling issued from a vehicle carrying the system, for the attention of the driver occupying a vehicle that follows the carrier vehicle.
  • the object of the present invention is in particular to improve the systems of the prior art or to propose an alternative solution to the known systems.
  • the object of the invention is a signaling system comprising a unit for generating at least one holographic image for performing a signaling that can be seen by an observer.
  • the holographic image generation unit comprises a support, a light guide plate and a translucent holographic stage, the light guide plate being on the one hand interposed between the support and the plate and on the other hand connected to a light inlet so that the light arriving through said inlet enters said plate by its edge.
  • the light guide plate makes it possible to let the light go out at a fixed angle by illuminating the holographic plate that makes it possible to generate the holographic image.
  • the light guide plate is plasmonic technology;
  • ⁇ The light guide plate is dielectric networks;
  • the light input is connected to a laser source, the light input being connectable to the laser source by an optical fiber;
  • the thickness of the light guide plate is substantially between 1 millimeter and 4 millimeters;
  • the cumulative thickness of the support, the light guide plate and the holographic plate of the unit is less than 1 centimeter;
  • the light guide plate is shaped to illuminate the holographic plate over its entire surface by a beam of light of uniform intensity.
  • the invention also relates to a motor vehicle comprising on the one hand a body with visible parts of the outside of the vehicle and on the other hand a signaling system comprising a generating unit of at least a holographic image to make a signage that can be seen by an observer.
  • the system is in accordance with the invention having its holographic image generation unit associated with one of the parts of the bodywork.
  • the body portion is a body panel portion to a rear face of the vehicle.
  • FIG. 1 is a schematic perspective side view of a signaling system according to the invention
  • FIG. 2 is a view of the type of FIG. 1 for a variant of the system according to the invention.
  • Figure 3 is a schematic perspective view of three quarters rear and top of a vehicle equipped with said variant of the system according to the invention.
  • the reference 1 0 designates a signaling system according to the invention.
  • This system is for example intended to equip a carrier vehicle for signaling to an observer.
  • the observer is in the carrier vehicle or is an occupant of another vehicle located behind the carrier vehicle.
  • the signaling system 1 0 comprises a unit 1 2 for generating at least one holographic image 1 3 likely to constitute the signaling.
  • the unit 1 2 of holographic image generation ( Figure 1) comprises a support 14, a light guide plate 1 6 integral with the support and a holographic plate 1 8 which is translucent and is integral with the guide plate light.
  • the direction designated as longitudinal corresponds to the direction perpendicular to the plate and the plate.
  • a light source 20 supplies light 20L to the holographic image generation unit 12, this light 20L being a laser beam.
  • the support 14 is flat and it may have flanges to fix between them the plate 1 6 and the plate 1 8 and the light source 20. It may for example be installed on a part of the automobile body as a panel or other equivalent bodywork component visible from outside the vehicle.
  • a light inlet 22 is provided on the edge 16T of the light guide plate 16, downstream of the light source 20, so that the light 20L arriving through said inlet 22 enters said plate by its edge 16T.
  • the light input 22 is directly connected to the light source 20.
  • the light guide plate 16 makes the light go out in the plate 18 at a fixed angle A, for example 56 degrees relative to the longitudinal direction.
  • the light guide plate has the property of providing a coherent beam, collimated and with said fixed angle to the holographic plate.
  • the holographic plate 18 is translucent and allows to generate, from the light emerging from the light guide plate, a beam 18H out of said platen and determining the holographic image 13 visible by the observer.
  • the holographic plate 18 has a protection vis-à-vis the external environment, for example by a polymer film.
  • the support may, for example with its not shown edges, also act as a protective element, particularly with respect to moisture, for the holographic patina 18 forming with the outer protection a sealed assembly.
  • the cumulative thickness of the support 14, the light guide plate 16 and the holographic plate 18 of the unit 12 is less than a few centimeters, for example of the order of 1 centimeter or less than a 1 centimeter.
  • the thickness of the light guide plate 16 is substantially 3 millimeters. More generally, the thickness of the light guide plate 16 is of the order of 1 millimeter to a few millimeters, for example being substantially between 1 millimeter and 4 millimeters. Thickness values can be for example 20% larger or 20% smaller.
  • the whole of this hologram rendering system is more compact, because it is thinner than it would be if it included optical devices such as lenses and a mirror, instead of the light guide plate 16
  • optical devices such as lenses and a mirror
  • the light guide plate 16 serves as a restitution device.
  • the light guide plate 16 must illuminate the holographic plate 18 over its entire surface by a light beam of uniform intensity, the width and the length of the plate 16 and the plate 18 being substantially identical.
  • This beam is coherent with its light waves having the same phase, collimated with its parallel rays, monochromatic with its rays having a single wavelength, for example at 633 nanometers, and with a precise angle (for example 56 ° degrees in l air) relative to the normal of the holographic plate.
  • the luminance at the input of the holographic stage must be sufficient, for example of the order of 3000 cd / m 2 to satisfy the regulation in the case of automobile signaling.
  • the light guide plate 16 is illuminated by its edge 16T by the laser source 20L 20L and the light comes out of the light guide plate at the fixed angle by being coherent, monochromatic, collimated and of identical width to the holographic plate 18 of the unit 1 1 for generating the holographic image.
  • optoelectronic technology allows in particular the implementation of guided optical technologies and the use of plasmonic resonance (plasmon) for the distribution, the light guidance and the phase control of the light waves.
  • the reduction of the light from the laser source can be obtained off and / or in the light guide plate using an optical demultiplexer which is of known type.
  • the optoelectronic devices implemented within the light guide plate may also comprise a light re-amplification to compensate for the losses due to the light guide, this re-amplification may for example be similar to that of lasers.
  • the system 10 makes it possible to propose a new architecture for the relief image display system.
  • the new architecture is based on the use in unit 12 of optoelectronic and plasmonic technologies.
  • the thickness of the plate 16 does not exceed a few millimeters.
  • the thickness of the system is reduced to facilitate its implementation in various environments. Such an implantation corresponds for example to a surface integration of an automobile body.
  • the plasmonic technology proposed for the light guide plate 16 is already known for example for guiding light in telecommunication optical fibers or for ultra-fast photo-detectors. It consists in influencing the light wave by acting on its electromagnetic component, by the implementation of a dielectric material, for example Si3N4, and metal nanoparticles, for example gold or silver. These nanoparticles resonate with the light wave. The whole can be achieved by conventional manufacturing techniques in microelectronics.
  • the plasmonic technology is used in an unusual way to achieve an illuminating plate, according to the need for restitution of a transmission hologram.
  • the arrangement of the light source 20, the light guide plate 16 and the holographic plate is in a global architecture that allows an optimization of the thickness of an image display system.
  • the light guide plate 16 may advantageously be produced according to a collective manufacturing process, such as semiconductor-based electronic components.
  • the dielectric network technology replaces or is associated with plasmonic technology.
  • This dielectric network technology is known per se for uses other than in a holographic unit according to the invention.
  • the dielectric network technology is used in an unusual way to make an illuminating plate, according to the need for restitution of a transmission hologram.
  • the light input 22 is connected to the source 20 of light by an optical fiber 20P. So, the light source 20, which can be bulky, is offset with respect to the holographic image generation unit 12.
  • the connector 22R comprises the input light 22 for feeding the holographic image generation unit.
  • the light source 20, producing a laser beam is placed at a distance from the light guide plate. It allows to bring the light, at one or more points of entry of the light guide plate, by means of one or more optical fibers. This offset can make it possible to use a non-miniaturized laser source, which is therefore potentially less expensive, and placed in a protected place in which space is not restricted, without affecting the overall thickness of the system.
  • FIG. 3 represents the principle of an exemplary implantation of the holographic signaling system 10 according to the invention at the rear of a vehicle 40.
  • the system is in conformity with that represented in FIG. 2, which allows the support 14 is associated with the body 40C of the vehicle and use a light source remote from the unit 12 comprising said support.
  • the unit 12 has about the size of 15 cm x 30 cm. It is in front of a driver who follows the vehicle, for example on the flap of the trunk 44 just beside the left rear light 42.
  • the light source 20 is installed protected inside the trunk and it does not need to be particularly compact.
  • the signaling could also be for example at the front of the vehicle or on its sides, by siting in the appropriate location of the unit at the front or on the sides of the vehicle.
  • the signaling could also be for example inside the vehicle, by siting at the appropriate location of the unit in the passenger compartment of the vehicle.

Abstract

Signalling system (10) comprising a unit (12) for generating at least one holographic image (13) in order to produce a signal capable of being seen by an observer (11). The unit (12) for generating a holographic image comprises a carrier (14), a light guiding sheet (16) and a translucent holographic plate (18), the light guiding sheet (16) being on the one hand interposed between the carrier (14) and the plate (18) and on the other hand connected to a light entrance (22) so that the light (20L) arriving via said entrance (22) penetrates into said sheet (16) via its edge face (16T). The light guiding sheet (16) makes it possible to make the light exit in a coherent beam, collimated at a set angle so as to illuminate the holographic plate (18), thereby allowing the holographic image (13) to be generated. Automotive vehicle comprising such a system having its unit (12) for generating holographic images associated with part of its body.

Description

SYSTEME DE SIGNALISATION HOLOGRAPHIQUE COMPRENANT UNE UNITE DE GENERATION D'AU MOINS UNE IMAGE HOLOGRAPHIQUE  HOLOGRAPHIC SIGNALING SYSTEM COMPRISING A GENERATION UNIT OF AT LEAST ONE HOLOGRAPHIC IMAGE
[0001 ] La présente invention est relative à un système de signalisation holographique comprenant une unité de génération d'au moins une image holographique, pour effectuer une signalisation susceptible d'être vue par un observateur. Par exemple ce système holographique est adapté à la signalisation émise à partir d'un véhicule porteur du système, à l'attention du conducteur occupant un véhicule qui suit le véhicule porteur. The present invention relates to a holographic signaling system comprising a unit for generating at least one holographic image, to perform a signal that can be seen by an observer. For example, this holographic system is adapted to the signaling issued from a vehicle carrying the system, for the attention of the driver occupying a vehicle that follows the carrier vehicle.
[ooo2] Ce genre de système est connu du document WO2009/095883 qui est relatif à des feux de véhicule intégrant des unités de génération d'image holographique. Les exemples de feux décrits dans ce document sont relativement complexes, chaque feu étant pourvu de deux unités. Un problème est que ce document décrit spécifiquement l'implantation d'un système holographique dans un feu, si bien qu'il ne donne pas d'indication pour une implantation ailleurs que dans un feu. Il ne concerne pas la réalisation des unités installées dans le véhicule. [Ooo2] This kind of system is known from WO2009 / 095883 which relates to vehicle lights incorporating holographic image generation units. The examples of fires described in this document are relatively complex, each fire being provided with two units. A problem is that this document specifically describes the implantation of a holographic system into a fire, so that it does not give an indication for an implantation other than in a fire. It does not concern the realization of the units installed in the vehicle.
[ooo3] Pour l'implantation d'un système de signalisation holographique, un problème courant réside dans le peu d'espace disponible au regard de l'encombrement du système. Ce problème est particulièrement crucial dans le cas de l'utilisation d'un tel système dans un véhicule automobile, par exemple pour effectuer une signalisation derrière un véhicule. Effectivement, l'espace disponible avec une orientation convenable de l'unité de génération, par exemple sur une porte de coffre arrière ou autour de cette porte, est souvent limité. [ooo3] For the implementation of a holographic signaling system, a common problem lies in the limited space available in view of the congestion of the system. This problem is particularly crucial in the case of the use of such a system in a motor vehicle, for example to carry out signaling behind a vehicle. Indeed, the space available with a proper orientation of the generating unit, for example on a trunk door or around this door, is often limited.
[ooo4] La présente invention a notamment pour but d'améliorer les systèmes de l'art antérieur ou à proposer une solution alternative aux systèmes connus. The object of the present invention is in particular to improve the systems of the prior art or to propose an alternative solution to the known systems.
[ooo5] A cet effet, l'invention a pour objet un système de signalisation comprenant une unité de génération d'au moins une image holographique pour effectuer une signalisation susceptible d'être vue par un observateur. L'unité de génération d'image holographique comprend un support, une plaque guide lumière et une platine holographique translucide, la plaque guide lumière étant d'une part interposée entre le support et la platine et d'autre part raccordée à une entrée de lumière de manière que la lumière arrivant par ladite entrée pénètre dans ladite plaque par sa tranche. La plaque guide lumière permet de faire sortir la lumière suivant un angle fixe en éclairant la platine holographique qui permet de générer l'image holographique. [Ooo5] For this purpose, the object of the invention is a signaling system comprising a unit for generating at least one holographic image for performing a signaling that can be seen by an observer. The holographic image generation unit comprises a support, a light guide plate and a translucent holographic stage, the light guide plate being on the one hand interposed between the support and the plate and on the other hand connected to a light inlet so that the light arriving through said inlet enters said plate by its edge. The light guide plate makes it possible to let the light go out at a fixed angle by illuminating the holographic plate that makes it possible to generate the holographic image.
[0006] Dans divers modes de réalisation du système selon l'invention, on peut éventuellement avoir recours en outre à l'une et/ou à l'autre des dispositions suivantes : In various embodiments of the system according to the invention, one can optionally also use one and / or the other of the following provisions:
• la plaque guide lumière est à technologie plasmonique ; · la plaque guide lumière est à réseaux diélectriques ; • the light guide plate is plasmonic technology; · The light guide plate is dielectric networks;
• l'entrée de lumière est reliée à une source laser, l'entrée de lumière pouvant être reliée à la source laser par une fibre optique ; The light input is connected to a laser source, the light input being connectable to the laser source by an optical fiber;
• l'épaisseur de la plaque guide lumière est comprise sensiblement entre 1 millimètre et 4 millimètres ; · l'épaisseur cumulée du support, de la plaque guide lumière et de la platine holographique de l'unité est inférieure à 1 centimètre ; The thickness of the light guide plate is substantially between 1 millimeter and 4 millimeters; The cumulative thickness of the support, the light guide plate and the holographic plate of the unit is less than 1 centimeter;
• la plaque guide lumière est conformée pour éclairer la platine holographique sur toute sa surface par un faisceau de lumière d'intensité uniforme. • The light guide plate is shaped to illuminate the holographic plate over its entire surface by a beam of light of uniform intensity.
[ooo7] Par ailleurs, l'invention a également pour objet un véhicule automobile comprenant d'une part une carrosserie à parties visibles de l'extérieur du véhicule et d'autre part un système de signalisation comprenant une unité de génération d'au moins une image holographique pour effectuer une signalisation susceptible d'être vue par un observateur. Dans ce véhicule, le système est conforme à l'invention en ayant son unité de génération d'image holographique associée à l'une des parties de la carrosserie. Dans un mode de réalisation de ce véhicule, la partie de la carrosserie est une partie de panneau de carrosserie à une face arrière du véhicule. [0008] D'autres buts, caractéristiques et avantages de l'invention apparaîtront au cours de la description suivante de plusieurs modes de réalisation, donnés à titre d'exemples non limitatifs, en regard des dessins joints dans lesquels : [Ooo7] Furthermore, the invention also relates to a motor vehicle comprising on the one hand a body with visible parts of the outside of the vehicle and on the other hand a signaling system comprising a generating unit of at least a holographic image to make a signage that can be seen by an observer. In this vehicle, the system is in accordance with the invention having its holographic image generation unit associated with one of the parts of the bodywork. In one embodiment of this vehicle, the body portion is a body panel portion to a rear face of the vehicle. Other objects, features and advantages of the invention will become apparent from the following description of several embodiments, given by way of non-limiting examples, with reference to the accompanying drawings in which:
• la figure 1 est une vue schématique de côté en perspective d'un système de signalisation selon l'invention ; FIG. 1 is a schematic perspective side view of a signaling system according to the invention;
• la figure 2 est une vue du type de la figure 1 pour une variante du système selon l'invention. FIG. 2 is a view of the type of FIG. 1 for a variant of the system according to the invention.
• la figure 3 est une vue schématique en perspective de trois quarts arrière et de dessus d'un véhicule équipé de ladite variante du système selon l'invention. • Figure 3 is a schematic perspective view of three quarters rear and top of a vehicle equipped with said variant of the system according to the invention.
[ooo9] En se reportant aux figures, la référence 1 0 désigne un système de signalisation selon l'invention. Ce système est par exemple destiné à équiper un véhicule porteur pour effectuer une signalisation à destination d'un observateur. Par exemple, l'observateur est dans le véhicule porteur ou est un occupant d'un autre véhicule situé derrière le véhicule porteur. [0oo9] Referring to the figures, the reference 1 0 designates a signaling system according to the invention. This system is for example intended to equip a carrier vehicle for signaling to an observer. For example, the observer is in the carrier vehicle or is an occupant of another vehicle located behind the carrier vehicle.
[ooi o] Le système de signalisation 1 0 comprend une unité 1 2 de génération d'au moins une image holographique 1 3 susceptible de constituer la signalisation. [Ooi o] The signaling system 1 0 comprises a unit 1 2 for generating at least one holographic image 1 3 likely to constitute the signaling.
[ooi i] L'unité 1 2 de génération d'image holographique (figure 1 ) comprend un support 14, une plaque guide lumière 1 6 solidaire du support et une platine holographique 1 8 qui est translucide et qui est solidaire de la plaque guide lumière. Dans la description qui va suivre, la direction désignée comme longitudinale correspond à la direction perpendiculaire à la plaque et à la platine. Une source lumineuse 20 alimente en lumière 20L l'unité 12 de génération d'image holographique, cette lumière 20L étant un rayon laser. [0012] Le support 14 est plat et il peut avoir des rebords pour fixer entre elles la plaque 1 6 et la platine 1 8 et la source de lumière 20. Il peut par exemple être installé sur une partie de carrosserie d'automobile comme un panneau ou tout autre organe de carrosserie équivalent visible de l'extérieur du véhicule. [0013] Une entrée de lumière 22 est aménagée sur la tranche 16T de la plaque guide lumière 16, en aval de la source de lumière 20, de manière que la lumière 20L arrivant par ladite entrée 22 pénètre dans ladite plaque par sa tranche 16T. Dans le mode de réalisation représenté à la figure 1 , l'entrée de lumière 22 est directement reliée à la source 20 de lumière. [Ooi i] The unit 1 2 of holographic image generation (Figure 1) comprises a support 14, a light guide plate 1 6 integral with the support and a holographic plate 1 8 which is translucent and is integral with the guide plate light. In the following description, the direction designated as longitudinal corresponds to the direction perpendicular to the plate and the plate. A light source 20 supplies light 20L to the holographic image generation unit 12, this light 20L being a laser beam. The support 14 is flat and it may have flanges to fix between them the plate 1 6 and the plate 1 8 and the light source 20. It may for example be installed on a part of the automobile body as a panel or other equivalent bodywork component visible from outside the vehicle. A light inlet 22 is provided on the edge 16T of the light guide plate 16, downstream of the light source 20, so that the light 20L arriving through said inlet 22 enters said plate by its edge 16T. In the embodiment shown in FIG. 1, the light input 22 is directly connected to the light source 20.
[0014] La plaque guide lumière 16 fait sortir la lumière dans la platine 18 suivant un angle fixe A, par exemple de 56 degrés par rapport à la direction longitudinale. La plaque guide lumière a pour propriété de fournir un faisceau cohérent, collimaté et avec ledit angle fixe vers la plaque holographique. [0015] La platine holographique 18 est translucide et elle permet de générer, à partir de la lumière sortant de la plaque guide lumière, un faisceau 18H sortant de ladite platine et déterminant l'image holographique 13 visible par l'observateur. La platine holographique 18 comporte une protection vis-à-vis de l'environnement extérieur, par exemple par un film polymère. Le support peut, par exemple avec ses rebords non représentés, jouer aussi le rôle d'élément protecteur, notamment vis-à-vis de l'humidité, pour la patine holographique 18 en formant avec la protection extérieure un ensemble scellé. The light guide plate 16 makes the light go out in the plate 18 at a fixed angle A, for example 56 degrees relative to the longitudinal direction. The light guide plate has the property of providing a coherent beam, collimated and with said fixed angle to the holographic plate. The holographic plate 18 is translucent and allows to generate, from the light emerging from the light guide plate, a beam 18H out of said platen and determining the holographic image 13 visible by the observer. The holographic plate 18 has a protection vis-à-vis the external environment, for example by a polymer film. The support may, for example with its not shown edges, also act as a protective element, particularly with respect to moisture, for the holographic patina 18 forming with the outer protection a sealed assembly.
[0016] L'épaisseur cumulée du support 14, de la plaque guide lumière 16 et de la platine holographique 18 de l'unité 12 est inférieure à quelques centimètres, par exemple de l'ordre de 1 centimètre ou plutôt moins d'un 1 centimètre. Dans un mode de réalisation avantageux car particulièrement plat, l'épaisseur de la plaque guide lumière 16 est sensiblement de 3 millimètres. De manière plus générale, l'épaisseur de la plaque guide lumière 16 est de l'ordre de 1 millimètre à quelques millimètres, par exemple en étant comprise sensiblement entre 1 millimètre et 4 millimètres. Les valeurs d'épaisseur peuvent être par exemple 20% plus importantes ou 20% moins importantes. Avantageusement, l'ensemble de ce système de restitution d'hologramme est plus compact, car plus mince qu'il ne serait s'il comprenait des dispositifs optiques tels que des lentilles et un miroir, à la place de la plaque guide de lumière 16. [0017] Le fonctionnement du système ressort déjà en partie de la description qui précède et va maintenant être détaillé. [0018] Pour réaliser la visualisation en relief correspondant à l'image holographique, la plaque guide lumière 16 sert de dispositif de restitution. La plaque guide lumière 16 doit éclairer la platine holographique 18 sur toute sa surface par un faisceau de lumière d'intensité uniforme, la largeur et la longueur de la plaque 16 et de la platine 18 étant sensiblement identiques. Ce faisceau est cohérent avec ses ondes lumineuses ayant la même phase, collimaté avec ses rayons parallèles, monochromatique avec ses rayons ayant une seule longueur d'onde, par exemple à 633 nanomètres, et avec un angle précis (par exemple 56°degrés dans l'air) par rapport à la normale de la plaque holographique. La luminance en entrée de la platine holographique doit être suffisante, par exemple de l'ordre de 3000 cd/m2 pour satisfaire la réglementation dans le cas de la signalisation automobile. The cumulative thickness of the support 14, the light guide plate 16 and the holographic plate 18 of the unit 12 is less than a few centimeters, for example of the order of 1 centimeter or less than a 1 centimeter. In an advantageous embodiment because particularly flat, the thickness of the light guide plate 16 is substantially 3 millimeters. More generally, the thickness of the light guide plate 16 is of the order of 1 millimeter to a few millimeters, for example being substantially between 1 millimeter and 4 millimeters. Thickness values can be for example 20% larger or 20% smaller. Advantageously, the whole of this hologram rendering system is more compact, because it is thinner than it would be if it included optical devices such as lenses and a mirror, instead of the light guide plate 16 The operation of the system is already apparent in part from the foregoing description and will now be detailed. To achieve the relief display corresponding to the holographic image, the light guide plate 16 serves as a restitution device. The light guide plate 16 must illuminate the holographic plate 18 over its entire surface by a light beam of uniform intensity, the width and the length of the plate 16 and the plate 18 being substantially identical. This beam is coherent with its light waves having the same phase, collimated with its parallel rays, monochromatic with its rays having a single wavelength, for example at 633 nanometers, and with a precise angle (for example 56 ° degrees in l air) relative to the normal of the holographic plate. The luminance at the input of the holographic stage must be sufficient, for example of the order of 3000 cd / m 2 to satisfy the regulation in the case of automobile signaling.
[0019] Pour satisfaire les exigences optiques pour la restitution d'un hologramme, la plaque guide lumière 16 est éclairée par sa tranche 16T par la source 20 de laser 20L et la lumière sort de la plaque guide lumière selon l'angle fixe en étant cohérente, monochromatique, collimatée et d'une largeur identique à la platine holographique 18 de l'unité 1 1 de génération de l'image holographique. A cet effet, la technologie optoélectronique permet en particulier la mise en œuvre de technologies d'optique guidée et l'utilisation de la résonnance plasmonique (plasmons) pour la répartition, le guidage de la lumière et le contrôle de la phase des ondes lumineuses et de l'angle du faisceau de sortie délivré à la platine holographique 18. La démultiplication de la lumière provenant de la source laser peut être obtenue hors et/ou dans la plaque guide lumière en utilisant un démultiplexeur optique qui est de type connu. Les dispositifs optoélectroniques mis en œuvre au sein de la plaque guide lumière peuvent aussi comporter une réamplification de lumière pour en compenser les pertes dues au guidage de la lumière, cette réamplification pouvant être par exemple de type similaire à celle des lasers. To meet the optical requirements for the return of a hologram, the light guide plate 16 is illuminated by its edge 16T by the laser source 20L 20L and the light comes out of the light guide plate at the fixed angle by being coherent, monochromatic, collimated and of identical width to the holographic plate 18 of the unit 1 1 for generating the holographic image. For this purpose, optoelectronic technology allows in particular the implementation of guided optical technologies and the use of plasmonic resonance (plasmon) for the distribution, the light guidance and the phase control of the light waves. the angle of the output beam delivered to the holographic stage 18. The reduction of the light from the laser source can be obtained off and / or in the light guide plate using an optical demultiplexer which is of known type. The optoelectronic devices implemented within the light guide plate may also comprise a light re-amplification to compensate for the losses due to the light guide, this re-amplification may for example be similar to that of lasers.
[0020] Le système 10 permet de proposer une nouvelle architecture pour le système de visualisation d'image en relief. La nouvelle architecture est basée sur l'utilisation dans l'unité 12 des technologies optoélectroniques et plasmoniques. Dans cette architecture, l'épaisseur de la plaque 16 ne dépasse pas quelques millimètres. L'épaisseur du système est réduite pour faciliter son implantation dans divers environnements. Une telle implantation correspond par exemple à une intégration en surface d'une carrosserie automobile. The system 10 makes it possible to propose a new architecture for the relief image display system. The new architecture is based on the use in unit 12 of optoelectronic and plasmonic technologies. In this architecture, the thickness of the plate 16 does not exceed a few millimeters. The thickness of the system is reduced to facilitate its implementation in various environments. Such an implantation corresponds for example to a surface integration of an automobile body.
[0021 ] La technologie plasmonique proposée pour la plaque guide lumière 16 est déjà connue par exemple pour le guidage de la lumière dans des fibres optiques de télécommunication ou pour des photo-détecteurs ultra-rapides. Elle consiste à influencer l'onde lumineuse en agissant sur sa composante électromagnétique, par la mise en œuvre d'un matériau diélectrique, par exemple Si3N4, et de nanoparticules métalliques, par exemple en or ou en argent. Ces nanoparticules entrent en résonnance avec l'onde lumineuse. Le tout peut être réalisé par des techniques classiques de fabrication en microélectronique. The plasmonic technology proposed for the light guide plate 16 is already known for example for guiding light in telecommunication optical fibers or for ultra-fast photo-detectors. It consists in influencing the light wave by acting on its electromagnetic component, by the implementation of a dielectric material, for example Si3N4, and metal nanoparticles, for example gold or silver. These nanoparticles resonate with the light wave. The whole can be achieved by conventional manufacturing techniques in microelectronics.
[0022] Avantageusement, dans la plaque guide lumière 16, la technologie plasmonique est utilisée de manière inhabituelle pour réaliser une plaque éclairante, selon le besoin de restitution d'un hologramme par transmission. Avantageusement, l'agencement de la source de lumière 20, de la plaque guide lumière 16 et de la platine holographique est selon une architecture globale qui permet une optimisation de l'épaisseur d'un système de visualisation en relief d'une image. Concernant les coûts, la plaque guide lumière 16 peut avantageusement être réalisée suivant un processus de fabrication collective, comme les composants électroniques à base de semi-conducteurs. Advantageously, in the light guide plate 16, the plasmonic technology is used in an unusual way to achieve an illuminating plate, according to the need for restitution of a transmission hologram. Advantageously, the arrangement of the light source 20, the light guide plate 16 and the holographic plate is in a global architecture that allows an optimization of the thickness of an image display system. As regards the costs, the light guide plate 16 may advantageously be produced according to a collective manufacturing process, such as semiconductor-based electronic components.
[0023] En variante, une autre possibilité pour diriger la lumière dans la plaque guide lumière, en complément ou à la place des plasmons, consiste à utiliser des réseaux diélectriques périodiques ou pseudopériodiques à pas variable. Ainsi, la technologie à réseaux diélectriques remplace ou est associée à la technologie plasmonique. Cette technologie de réseaux diélectriques est connue en elle-même pour des utilisations autres que dans une unité holographique selon l'invention. Avantageusement, dans la plaque guide lumière, la technologie des réseaux diélectriques est utilisée de manière inhabituelle pour réaliser une plaque éclairante, selon le besoin de restitution d'un hologramme par transmission. [0024] En variante, dans le mode de réalisation représenté à la figure 2, l'entrée de lumière 22 est reliée à la source 20 de lumière par une fibre optique 20P. Ainsi, la source lumineuse 20, qui peut être volumineuse, est déportée par rapport à l'unité 12 de génération d'image holographique. Alternatively, another possibility for directing the light in the light guide plate, in addition to or instead of the plasmons, is to use periodic or pseudoperiodic dielectric networks with variable pitch. Thus, the dielectric network technology replaces or is associated with plasmonic technology. This dielectric network technology is known per se for uses other than in a holographic unit according to the invention. Advantageously, in the light guide plate, the dielectric network technology is used in an unusual way to make an illuminating plate, according to the need for restitution of a transmission hologram. Alternatively, in the embodiment shown in Figure 2, the light input 22 is connected to the source 20 of light by an optical fiber 20P. So, the light source 20, which can be bulky, is offset with respect to the holographic image generation unit 12.
[0025] Un raccord 22R de type connu, ou tout autre organe équivalent tel qu'une extension du support, fait l'interface entre la fibre optique 20P et la tranche 16T de la plaque guide lumière 16. Le raccord 22R comporte l'entrée de lumière 22 permettant d'alimenter l'unité génération d'image holographique. A connector 22R of known type, or any other equivalent member such as an extension of the support, makes the interface between the optical fiber 20P and the edge 16T of the light guide plate 16. The connector 22R comprises the input light 22 for feeding the holographic image generation unit.
[0026] La source lumineuse 20, produisant un faisceau laser, est placée à distance de la plaque guide de lumière. Elle permet d'amener la lumière, en un ou plusieurs points d'entrée de la plaque guide de lumière, au moyen d'une ou plusieurs fibres optiques. Ce déport peut permettre d'utiliser une source laser non miniaturisée donc potentiellement moins onéreuse, et placée en un endroit protégé dans lequel la place n'est pas restreinte, sans nuire à l'épaisseur globale du système. The light source 20, producing a laser beam, is placed at a distance from the light guide plate. It allows to bring the light, at one or more points of entry of the light guide plate, by means of one or more optical fibers. This offset can make it possible to use a non-miniaturized laser source, which is therefore potentially less expensive, and placed in a protected place in which space is not restricted, without affecting the overall thickness of the system.
[0027] L'unité 12 de génération d'image holographique et la source de lumière 20 sont adaptées à toute application de signalisation ou d'affichage par image holographique. La figure 3 représente le principe d'un exemple d'implantation du système de signalisation holographique 10 selon l'invention à l'arrière d'un véhicule 40. Le système est conforme à celui représenté à la figure 2, ce qui permet que le support 14 soit associé à la carrosserie 40C du véhicule et d'utiliser une source lumineuse déportée par rapport à l'unité 12 comprenant ledit support. Ici, l'unité 12 a environ la taille de 15 cm x 30 cm. Elle se situe en face d'un conducteur qui suit le véhicule, par exemple sur le volet du coffre 44 juste à côté du feu arrière gauche 42. La source lumineuse 20 est installée protégée à l'intérieur du coffre et elle n'a pas besoin d'être particulièrement compacte. [0028] D'autres emplacements d'implantation de ladite unité et de ladite source peuvent être envisagés pour assurer une signalisation par hologramme derrière le véhicule. La signalisation pourrait aussi être par exemple à l'avant du véhicule ou sur ses côtés, moyennant l'implantation à l'emplacement approprié de l'unité à l'avant ou sur les côtés du véhicule. La signalisation pourrait aussi être par exemple à l'intérieur du véhicule, moyennant l'implantation à l'emplacement approprié de l'unité dans l'habitacle du véhicule. The holographic image generation unit 12 and the light source 20 are suitable for any signaling application or holographic image display. FIG. 3 represents the principle of an exemplary implantation of the holographic signaling system 10 according to the invention at the rear of a vehicle 40. The system is in conformity with that represented in FIG. 2, which allows the support 14 is associated with the body 40C of the vehicle and use a light source remote from the unit 12 comprising said support. Here, the unit 12 has about the size of 15 cm x 30 cm. It is in front of a driver who follows the vehicle, for example on the flap of the trunk 44 just beside the left rear light 42. The light source 20 is installed protected inside the trunk and it does not need to be particularly compact. Other locations of said unit and said source may be considered to provide a hologram signaling behind the vehicle. The signaling could also be for example at the front of the vehicle or on its sides, by siting in the appropriate location of the unit at the front or on the sides of the vehicle. The signaling could also be for example inside the vehicle, by siting at the appropriate location of the unit in the passenger compartment of the vehicle.

Claims

REVENDICATIONS
1. Système de signalisation (10) comprenant une unité (12) de génération d'au moins une image holographique (13) pour effectuer une signalisation susceptible d'être vue par un observateur (1 1 ), c_a/acténsé_en_çe que l'unité (12) de génération d'image holographique comprend un support (14), une plaque guide lumière (16) et une platine holographique (18) translucide, la plaque guide lumière (16) étant d'une part interposée entre le support (14) et la platine (18) et d'autre part raccordée à une entrée de lumière (22) de manière que la lumière (20L) arrivant par ladite entrée (22) pénètre dans ladite plaque (16) par sa tranche (16T), la plaque guide lumière (16) permettant de faire sortir la lumière suivant un faisceau cohérent, collimaté et à angle fixe en éclairant la platine holographique (18) qui permet de générer l'image holographique (13). A signaling system (10) comprising a unit (12) for generating at least one holographic image (13) for performing signaling that can be seen by an observer (1 1), which is active only when the unit (12) comprises a support (14), a light guide plate (16) and a translucent holographic plate (18), the light guide plate (16) being interposed between the support (14) and ) and the plate (18) and on the other hand connected to a light input (22) so that light (20L) arriving through said input (22) enters said plate (16) by its edge (16T), the light guide plate (16) making it possible to release the light in a coherent, collimated and fixed-angle beam by illuminating the holographic stage (18) which makes it possible to generate the holographic image (13).
2. Système selon la revendication précédente, caractérisé en ce que la plaque guide lumière (16) est à technologie plasmonique. 2. System according to the preceding claim, characterized in that the light guide plate (16) is plasmonic technology.
3. Système selon l'une quelconque des revendications précédentes, caractérisé en ce que la plaque guide lumière (16) est à réseaux diélectriques. 3. System according to any one of the preceding claims, characterized in that the light guide plate (16) is dielectric networks.
4. Système selon l'une quelconque des revendications précédentes, caractérisé en ce que l'entrée de lumière (22) est reliée à une source laser (20). 4. System according to any one of the preceding claims, characterized in that the light inlet (22) is connected to a laser source (20).
5. Système selon la revendication précédente, caractérisé en ce que l'entrée de lumière (22) est reliée à la source laser (20) par une fibre optique (20P). 5. System according to the preceding claim, characterized in that the light inlet (22) is connected to the laser source (20) by an optical fiber (20P).
6. Système selon l'une quelconque des revendications précédentes, caractérisé en ce que l'épaisseur de la plaque guide lumière (16) est comprise sensiblement entre 1 millimètre et 4 millimètres. 6. System according to any one of the preceding claims, characterized in that the thickness of the light guide plate (16) is substantially between 1 millimeter and 4 millimeters.
7. Système selon la revendication précédente, caractérisé en ce que l'épaisseur cumulée du support (14), de la plaque guide lumière (16) et de la platine holographique (18) de l'unité (12) est inférieure à 1 centimètre. 7. System according to the preceding claim, characterized in that the cumulative thickness of the support (14), the light guide plate (16) and the holographic plate (18) of the unit (12) is less than 1 cm. .
8. Système selon l'une quelconque des revendications précédentes, caractérisé en ce que la plaque guide lumière (16) est conformée pour éclairer la platine holographique (18) sur toute sa surface par un faisceau de lumière d'intensité uniforme. 8. System according to any one of the preceding claims, characterized in that the light guide plate (16) is shaped to illuminate the holographic stage (18) over its entire surface by a light beam of uniform intensity.
9. Véhicule automobile (40) comprenant d'une part une carrosserie (40C) à parties (40P) visibles de l'extérieur du véhicule (40) et d'autre part un système (10) de signalisation comprenant une unité (12) de génération d'au moins une image holographique (13) pour effectuer une signalisation susceptible d'être vue par un observateur (1 1 ), caractérisé en ce que le système (10) est conforme à l'une quelconque des revendications précédentes en ayant son unité (12) de génération d'image holographique associée à l'une des parties (40P) de la carrosserie. 9. Motor vehicle (40) comprising on the one hand a body (40C) with parts (40P) visible from the outside of the vehicle (40) and on the other hand a signaling system (10) comprising a unit (12) for generating at least one holographic image (13) for signaling that can be seen by an observer (1 1), characterized in that the system (10) is in accordance with any preceding claim having its holographic image generating unit (12) associated with one of the body parts (40P).
10. Véhicule selon la revendication précédente, caractérisé en ce que la partie (40P) de la carrosserie (40C) est une partie de panneau de carrosserie à une face arrière du véhicule. 10. Vehicle according to the preceding claim, characterized in that the portion (40P) of the body (40C) is a part of the body panel to a rear face of the vehicle.
PCT/EP2013/077258 2013-01-07 2013-12-18 Holographic signalling system comprising a unit for generating at least one holographic image WO2014106584A1 (en)

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GB2595452B (en) * 2020-05-21 2022-10-26 Jaguar Land Rover Ltd Illumination device, method and system
GB2609762A (en) * 2020-05-21 2023-02-15 Jaguar Land Rover Ltd Illumination device, method and system
GB2609762B (en) * 2020-05-21 2023-08-30 Jaguar Land Rover Ltd Illumination device, method and system

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FR3000811B1 (en) 2015-01-30
FR3000811A1 (en) 2014-07-11
EP2941672A1 (en) 2015-11-11
CN105431786A (en) 2016-03-23

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