EP2489925A1 - Optical unit for a signalling and / or lighting device - Google Patents

Optical unit for a signalling and / or lighting device Download PDF

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Publication number
EP2489925A1
EP2489925A1 EP12155491A EP12155491A EP2489925A1 EP 2489925 A1 EP2489925 A1 EP 2489925A1 EP 12155491 A EP12155491 A EP 12155491A EP 12155491 A EP12155491 A EP 12155491A EP 2489925 A1 EP2489925 A1 EP 2489925A1
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EP
European Patent Office
Prior art keywords
lens
light
unit
complementary
unit according
Prior art date
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Granted
Application number
EP12155491A
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German (de)
French (fr)
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EP2489925B1 (en
Inventor
Pierre Albou
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Vision SAS
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Valeo Vision SAS
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Publication of EP2489925A1 publication Critical patent/EP2489925A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/155—Surface emitters, e.g. organic light emitting diodes [OLED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/255—Lenses with a front view of circular or truncated circular outline
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/275—Lens surfaces, e.g. coatings or surface structures

Definitions

  • the invention relates in particular to an optical unit, in particular for a signaling and / or lighting device for a motor vehicle.
  • the present invention aims in particular to avoid this type of disadvantage.
  • Isotropic source means a source whose intensity is independent of the angle of observation, within the solid angle containing all its rays.
  • a Lambertian source for its part, has a luminance independent of the point considered on the surface of the emitter and the angle of observation inside the solid angle containing all rays.
  • the image focus of the corrugated lens is preferably at infinity.
  • the invention makes it possible, thanks to the appropriate corrugated surface of the lens, to obtain a beam, in particular a complementary, relatively thin and spreading free-form motorway beam, which is not in the form of a "banana” and which, in overlap with a beam code, gives a satisfactory luminous homogeneity.
  • the lens has a basic geometrical surface, which surface is fictitious, corresponding in particular to an exit face of a rigorously stigmatic lens.
  • the corrugated face of the lens comprises corrugations of variable slope, this slope being measured with respect to the geometrical base surface, this slope preferably being all the greater as the undulation is removed from a center of the lens. , so as to produce a single maximum illumination zone in the complementary beam, and no secondary maxima zones.
  • the invention thus makes it possible to avoid the appearance, in the complementary bundle, of distinct light spots (which may cause discomfort for the driver of the vehicle). This makes this complementary beam relatively homogeneous.
  • the optical unit has an optical axis, and each undulation is formed on a strip, this strip preferably extending substantially rectilinearly when the lens is observed along the axis. optical.
  • the corrugations are substantially parallel to each other.
  • the amplitude of the corrugations is increasing as the considered wave is removed from the center of the lens.
  • This amplitude is preferably measured with respect to the basic geometrical surface (which is fictitious) of the lens.
  • the lens is arranged to give a point of light point located at its object focus, a substantially horizontal light line when the corrugations of the lens are placed substantially vertically.
  • the lens is made in one piece.
  • the wavy face of the lens is arranged as the exit face of the light.
  • the light source comprises a LED (light-emitting diode) with a plane light emitter, the plane of this emitter advantageously extending in an inclined manner with respect to the optical axis.
  • the plane of the transmitter is neither perpendicular nor parallel to the optical axis.
  • the object focus of the lens is placed substantially in the center of a lower edge of the emitter of the light source.
  • the lens has a substantially circular periphery, or rectangular or trapezoidal, when it is observed along the optical axis.
  • the optical unit has a top and a bottom when in place on the vehicle.
  • This unit may further comprise a reflector placed in the unit, in order to intercept at least a portion of the light rays from the light source so as to create an upwardly defocused image, which image, projected and spread through the lens, completes the complementary beam downwards.
  • a reflector placed in the unit, in order to intercept at least a portion of the light rays from the light source so as to create an upwardly defocused image, which image, projected and spread through the lens, completes the complementary beam downwards.
  • the optical unit has an axis transverse to the optical axis and extending substantially horizontally when the unit is mounted on the vehicle, and the reflector has a substantially sectoral shape. of cylinder of transverse axis.
  • the reflector comprises a front edge located between the lens and the light source.
  • the motorway beam has a horizontal cutoff located between a horizontal plane and an inclined plane of 0.57 ° downwards to the left or right of the optical axis, depending on the type of traffic (left or right traffic, respectively). ).
  • This cutoff line is preferably located in a plane inclined 0.29 ° downwards.
  • This motorway beam may, in particular, have a maximum intensity higher than 80% than a conventional code using a source of the same nature.
  • the device is arranged so that the complementary beam is lit only when the vehicle is traveling at a speed greater than a predetermined threshold (non-zero), this threshold being for example substantially equal to 110 km / h.
  • a predetermined threshold non-zero
  • the device according to the invention can be unconditionally activated on the highway.
  • an optical unit 1 for a motor vehicle lighting device D arranged to produce a complementary light beam FC intended to be used with a main light beam produced by another optical unit 30, this complementary beam FC having a cutoff C substantially flat (see cut C on the Figures 5 and 8 ).
  • the optical unit 30 may optionally be LED.
  • the complementary beam FC may be a complementary, relatively thin and spreading free-form motorway beam, which is not in the form of a "banana", and the main beam may be a code beam.
  • the device in a variant not illustrated, it is possible to arrange the device to enable it to produce a bad weather beam, for example class W.
  • the cut C is formed by lateral edges BL which are straightened, namely substantially parallel to a horizontal line, and not falling relative to this horizontal line.
  • the corrugated face 4 of the lens 3 comprises corrugations 5 of variable slope, this slope being measured relative to the basic geometric surface SB, this slope being all the greater as the corrugation 5 is moved away from a center CO of the lens, so as to produce a single zone of maximum illumination ZMax in the complementary beam FC (see FIG. Figures 5 and 8 ).
  • the invention thus makes it possible to avoid the appearance, in the complementary bundle FC, of several local illumination maxima and thus of distinct light tasks (which may cause discomfort for the driver of the vehicle).
  • the invention thus makes it possible to make this complementary bundle FC relatively homogeneous.
  • the optical unit has an optical axis Ox (see figure 6 ), and each undulation 5 is formed on a strip 7 of the lens 3, each strip 7 extending substantially rectilinearly when the lens 3 is observed along the optical axis Ox.
  • the corrugations 5 are substantially parallel to each other.
  • the amplitude of the corrugations 5 is increasing as the undulation considered is remote from the center CO of the lens 3.
  • This amplitude is preferably measured with respect to the base geometrical surface SB (which is fictitious) of the lens 3.
  • the lens 3 is arranged to give, from a point light point located at its object focus F, a substantially horizontal light line when the corrugations of the lens are placed substantially vertically.
  • the corrugated face 4 of the lens 3 is arranged in the unit 1 as the exit face of the light.
  • the other face 9 of the lens 3, opposite the face 4, is for example flat. This notably makes it possible to reduce the aberrations substantially.
  • H is the angle of an observation direction of the beam with a vertical plane containing the optical axis.
  • M [X, Y, Z] F (u, v) be a parametric equation of the exit surface 4 of the basic stigmatic lens (an equation that can be established by those skilled in the art for a draw, a face input and a given material, in the following example the draft is 70 mm, the input face is flat and the material is PMMA).
  • the modulation function ⁇ x is then such that the deviations are greater on the side corresponding to the zones of the lens 3 furthest away from the axis (and thus receiving less flux).
  • the LED 2 has a plane light emitter 10, the plane of this emitter 10 extending inclined with respect to the optical axis Ox, as can be seen in FIG. figure 6 .
  • the plane of the emitter 10 is neither perpendicular nor parallel to the optical axis.
  • the object focus F of the lens 3 is placed substantially in the center of a lower edge 11 of the emitter 10 of the light source 2.
  • the lens 3 has a substantially circular periphery 12.
  • the optical unit has a top and a bottom when in place on the vehicle.
  • the rear edge 21 of the reflector 15 defines with the upper edge of the transmitter 10 a non-zero distance d, which in the example described, depends on the encapsulation of the LED. This distance d is characteristic of the zone of the emitter 10 which is hidden vis-à-vis the reflector 15.
  • the optical unit 1 has an axis Oy transverse to the optical axis Ox and extending substantially horizontally when the unit 1 is mounted on the vehicle.
  • the reflector 15 has a shape substantially in cylinder sector of transverse axis Oy.
  • the reflector 15 has a front edge 22 located between the lens 3 and the light source 2.
  • the reflector 15 is placed so as not to hide the bottom of the transmitter 10, which must be seen from the entire input face 9 of the lens 3 (in order not to decrease the intensity under the cut) and so as to cover a fraction of the top of the transmitter 10 (seen from the input face 9 of the lens) to allow a good fusion of the beam it creates and the main beam (in direct light ).
  • This reflector 15 can thus take the form of a transverse axis cylinder Oy, longer than the emitter.
  • the cross section of the cylinder may be a parabola or a spline curve for example of degree 3 which approaches it (and allows, by adjusting the voltages at its ends, to adjust the shape of the beam).
  • the device is arranged so that the complementary beam is lit only when the vehicle is traveling at a speed greater than a predetermined threshold (non-zero), this threshold being for example substantially equal to 110 km / h.
  • a predetermined threshold non-zero

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

The unit (1) has a light source (2) i.e. LED, emitting Lambertian or isotropic light. A lens (3) is associated with the light source to produce a complementary light beam, and has a corrugated face (4) to obtain the complementary light beam with straightened side edges. The lens has a basic geometric surface that corresponds to an output face of a stigmatic lens. The corrugated face of the lens has undulations (5) with variable slope that is measured with respect to the basic geometric surface, where each undulation is formed in a ridge (7). Independent claims are also included for the following: (1) a signaling and/or lighting device for a motor vehicle (2) a method for producing a light beam i.e. high-way beam.

Description

L'invention concerne notamment une unité optique, notamment pour dispositif de signalisation et/ou d'éclairage pour véhicule automobile.The invention relates in particular to an optical unit, in particular for a signaling and / or lighting device for a motor vehicle.

On connaît par la demande de brevet EP 1 762 776 un module de projecteur lumineux, utilisant une lentille, capable de produire un faisceau à coupure du type faisceau autoroute. Un inconvénient de ce module est lié à la forme légèrement en « banane » de ce faisceau autoroute, ce faisceau présentant des extrémités excessivement basses qui sont inefficaces d'un point de vue photométrique.It is known from the patent application EP 1 762 776 a light projector module, using a lens, capable of producing a break beam of the motorway beam type. A disadvantage of this module is related to the slightly "banana" shape of this motorway beam, this beam having excessively low ends which are ineffective from a photometric point of view.

La présente invention vise notamment à éviter ce type d'inconvénient.The present invention aims in particular to avoid this type of disadvantage.

L'invention a ainsi pour objet une unité optique, notamment pour dispositif de signalisation et/ou d'éclairage de véhicule automobile, agencée pour produire un faisceau de lumière complémentaire destiné à être utilisé avec un faisceau de lumière principal, ce faisceau complémentaire présentant une coupure notamment sensiblement plate, cette unité comportant :

  • au moins une source de lumière à émission lumineuse sensiblement isotrope ou lambertienne, notamment une LED,
  • au moins une lentille associée à cette source de lumière pour participer à la production du faisceau complémentaire, cette lentille comportant une face ondulée, différente d'une face de lentille stigmatique pure, agencée pour obtenir le faisceau complémentaire avec des bords latéraux redressés.
The invention thus relates to an optical unit, in particular for a motor vehicle signaling and / or lighting device, arranged to produce a complementary light beam intended to be used with a main light beam, this complementary beam having a cutting particularly substantially flat, this unit comprising:
  • at least one substantially isotropic or lambertian light-emitting light source, in particular an LED,
  • at least one lens associated with this light source to participate in the production of the complementary beam, this lens having a corrugated surface, different from a pure stigmatic lens face, arranged to obtain the complementary beam with rectified lateral edges.

Par « source isotrope », on entend une source dont l'intensité est indépendante de l'angle d'observation, à l'intérieur de l'angle solide contenant tous ses rayons."Isotropic source" means a source whose intensity is independent of the angle of observation, within the solid angle containing all its rays.

Une source lambertienne a, quant à elle, une luminance indépendante du point considéré à la surface de l'émetteur et de l'angle d'observation à l'intérieur de l'angle solide contenant tous rayons.A Lambertian source, for its part, has a luminance independent of the point considered on the surface of the emitter and the angle of observation inside the solid angle containing all rays.

Le foyer image de la lentille à face ondulée est de préférence à l'infini.The image focus of the corrugated lens is preferably at infinity.

L'invention permet, grâce à la face ondulée appropriée de la lentille, d'obtenir un faisceau, notamment un faisceau complémentaire autoroute, relativement mince et étalé, qui ne soit pas en forme de « banane » et qui, en recouvrement avec un faisceau code, donne une homogénéité lumineuse satisfaisante.The invention makes it possible, thanks to the appropriate corrugated surface of the lens, to obtain a beam, in particular a complementary, relatively thin and spreading free-form motorway beam, which is not in the form of a "banana" and which, in overlap with a beam code, gives a satisfactory luminous homogeneity.

De préférence, la lentille présente une surface géométrique de base, surface qui est fictive, correspondant notamment à une face de sortie d'une lentille rigoureusement stigmatique.Preferably, the lens has a basic geometrical surface, which surface is fictitious, corresponding in particular to an exit face of a rigorously stigmatic lens.

Avantageusement la face ondulée de la lentille comporte des ondulations de pente variable, cette pente étant mesurée par rapport à la surface géométrique de base, cette pente étant de préférence d'autant plus grande que l'ondulation est éloignée d'un centre de la lentille, de manière à produire une seule zone d'éclairement maximal dans le faisceau complémentaire, et pas de zones de maxima secondaires.Advantageously, the corrugated face of the lens comprises corrugations of variable slope, this slope being measured with respect to the geometrical base surface, this slope preferably being all the greater as the undulation is removed from a center of the lens. , so as to produce a single maximum illumination zone in the complementary beam, and no secondary maxima zones.

L'invention permet ainsi d'éviter l'apparition, dans le faisceau complémentaire, de tâches lumineuses distinctes (susceptibles d'occasionner des gênes pour le conducteur du véhicule). Ceci permet de rendre ce faisceau complémentaire relativement homogène.The invention thus makes it possible to avoid the appearance, in the complementary bundle, of distinct light spots (which may cause discomfort for the driver of the vehicle). This makes this complementary beam relatively homogeneous.

Dans un exemple de mise en oeuvre de l'invention, l'unité optique présente un axe optique, et chaque ondulation est formée sur une strie, cette strie s'étendant de préférence de manière sensiblement rectiligne lorsque la lentille est observée suivant l'axe optique.In an exemplary implementation of the invention, the optical unit has an optical axis, and each undulation is formed on a strip, this strip preferably extending substantially rectilinearly when the lens is observed along the axis. optical.

Avantageusement les ondulations sont sensiblement parallèles entre elles.Advantageously, the corrugations are substantially parallel to each other.

Le cas échéant, l'amplitude des ondulations est croissante au fur et à mesure que l'ondulation considérée est éloignée du centre de la lentille.If necessary, the amplitude of the corrugations is increasing as the considered wave is removed from the center of the lens.

Cette amplitude est de préférence mesurée par rapport à la surface géométrique de base (qui est fictive) de la lentille.This amplitude is preferably measured with respect to the basic geometrical surface (which is fictitious) of the lens.

Dans un exemple de mise en oeuvre de l'invention, la lentille est agencée pour donner, d'un point lumineux ponctuel situé à son foyer objet, une ligne lumineuse sensiblement horizontale lorsque les ondulations de la lentille sont placées de manière sensiblement verticale.In an exemplary implementation of the invention, the lens is arranged to give a point of light point located at its object focus, a substantially horizontal light line when the corrugations of the lens are placed substantially vertically.

Si on le souhaite, la lentille est réalisée d'un seul tenant.If desired, the lens is made in one piece.

Le cas échéant, la face ondulée de la lentille est agencée comme face de sortie de la lumière.Where appropriate, the wavy face of the lens is arranged as the exit face of the light.

Dans un exemple de mise en oeuvre de l'invention, la source de lumière comporte une LED (diode électroluminescente) à émetteur lumineux plan, le plan de cet émetteur s'étendant avantageusement de manière inclinée par rapport à l'axe optique. De préférence, le plan de l'émetteur n'est ni perpendiculaire ni parallèle à l'axe optique.In an exemplary implementation of the invention, the light source comprises a LED (light-emitting diode) with a plane light emitter, the plane of this emitter advantageously extending in an inclined manner with respect to the optical axis. Preferably, the plane of the transmitter is neither perpendicular nor parallel to the optical axis.

Avantageusement le foyer objet de la lentille est placé sensiblement au centre d'un bord inférieur de l'émetteur de la source de lumière.Advantageously, the object focus of the lens is placed substantially in the center of a lower edge of the emitter of the light source.

Le cas échéant, la lentille présente un pourtour sensiblement circulaire, ou rectangulaire ou trapézoïdal, lorsqu'elle est observée suivant l'axe optique.Where appropriate, the lens has a substantially circular periphery, or rectangular or trapezoidal, when it is observed along the optical axis.

L'unité optique présente un haut et un bas lorsqu'elle est en place sur le véhicule.The optical unit has a top and a bottom when in place on the vehicle.

Cette unité peut comporter en outre un réflecteur placé dans l'unité, afin d'intercepter au moins une partie des rayons lumineux provenant de la source de lumière de manière à créer une image étalée vers le haut et défocalisée, image qui, projetée et étalée par la lentille, vient compléter le faisceau complémentaire vers le bas.This unit may further comprise a reflector placed in the unit, in order to intercept at least a portion of the light rays from the light source so as to create an upwardly defocused image, which image, projected and spread through the lens, completes the complementary beam downwards.

Dans un exemple de mise en oeuvre de l'invention, l'unité optique présente un axe transversal à l'axe optique et s'étendant sensiblement horizontalement lorsque l'unité est montée sur le véhicule, et le réflecteur présente une forme sensiblement en secteur de cylindre d'axe transversal.In an exemplary implementation of the invention, the optical unit has an axis transverse to the optical axis and extending substantially horizontally when the unit is mounted on the vehicle, and the reflector has a substantially sectoral shape. of cylinder of transverse axis.

Avantageusement le réflecteur comporte un bord avant situé entre la lentille et la source de lumière.Advantageously, the reflector comprises a front edge located between the lens and the light source.

L'invention a également pour objet un dispositif d'éclairage et/ou de signalisation, notamment de véhicule automobile, comportant :

  • une unité optique principale capable de produire un faisceau de lumière principal, notamment un faisceau de croisement,
  • une unité optique telle que définie ci-dessus, capable de produire un faisceau complémentaire présentant une coupure notamment sensiblement plate, les faisceaux principal et complémentaire formant un faisceau global, ce faisceau global étant notamment un faisceau autoroute de portée de préférence supérieure ou égale à 100 mètres.
The invention also relates to a lighting and / or signaling device, particularly a motor vehicle, comprising:
  • a main optical unit capable of producing a main beam of light, in particular a passing beam,
  • an optical unit as defined above, capable of producing a complementary beam exhibiting a particularly flat cutoff, the main and complementary beams forming a global beam, this overall beam notably being a motorway beam with a range of preferably greater than or equal to 100; meters.

Par exemple, le faisceau autoroute présente une coupure horizontale située entre un plan horizontal et un plan incliné de 0.57° vers le bas, à gauche ou à droite de l'axe optique, suivant le type de trafic (trafic à droite ou à gauche respectivement). Cette ligne de coupure est de préférence située dans un plan incliné de 0.29° vers le bas. Ce faisceau autoroute peut réglementairement présenter notamment une intensité maximum plus élevée de 80% qu'un code classique utilisant une source de même nature.For example, the motorway beam has a horizontal cutoff located between a horizontal plane and an inclined plane of 0.57 ° downwards to the left or right of the optical axis, depending on the type of traffic (left or right traffic, respectively). ). This cutoff line is preferably located in a plane inclined 0.29 ° downwards. This motorway beam may, in particular, have a maximum intensity higher than 80% than a conventional code using a source of the same nature.

Dans un exemple de mise en oeuvre de l'invention, le dispositif est agencé de manière à ce que le faisceau complémentaire soit allumé seulement lorsque le véhicule roule à une vitesse supérieure à un seuil prédéterminé (non nul), ce seuil étant par exemple sensiblement égal à 110 km/h.In an exemplary implementation of the invention, the device is arranged so that the complementary beam is lit only when the vehicle is traveling at a speed greater than a predetermined threshold (non-zero), this threshold being for example substantially equal to 110 km / h.

Dans le cas où le véhicule dispose d'un système de navigation permettant de connaître le type de route sur lequel il circule, le dispositif selon l'invention peut être inconditionnellement activé sur autoroute.In the case where the vehicle has a navigation system to know the type of road on which it travels, the device according to the invention can be unconditionally activated on the highway.

L'invention a encore pour objet un procédé pour produire un faisceau lumineux, notamment un faisceau autoroute, pour véhicule automobile, notamment à l'aide d'une unité optique telle définie ci-dessus, ce procédé comportant l'étape suivante :

  • générer un faisceau complémentaire notamment à coupure sensiblement plate et ayant une unique zone d'éclairement maximal.
The subject of the invention is also a method for producing a light beam, in particular a motorway beam, for a motor vehicle, in particular using an optical unit as defined above, this method comprising the following step:
  • generating a complementary beam including a substantially flat cutoff and having a single maximum illumination area.

L'invention pourra être mieux comprise à la lecture de la description détaillée qui va suivre, d'un exemple de mise en oeuvre non limitatif de l'invention, et à l'examen du dessin annexé, sur lequel :

  • la figure 1 illustre, schématiquement et partiellement, différents éléments d'une unité optique conforme à un exemple de mise en oeuvre de l'invention,
  • la figure 2 représente, schématiquement et partiellement, le profil géométrique en coupe de la lentille de l'unité de la figure 1,
  • les figures 3 et 4 illustrent la variation de grandeurs caractéristiques du profil de la lentille de l'unité de la figure 1,
  • la figure 5 représente, schématiquement et partiellement, intercepté par un écran perpendiculaire à l'axe optique, un faisceau obtenu grâce à la lentille de l'unité de la figure 1, sans la présence du réflecteur,
  • les figures 6 et 7 représentent, schématiquement et partiellement, en coupe, l'émetteur et le réflecteur de l'unité optique de la figure 1, et
  • la figure 8 représente, schématiquement et partiellement, intercepté par un écran perpendiculaire à l'axe optique, un faisceau obtenu grâce à la lentille de l'unité de la figure 1, avec la présence du réflecteur.
The invention will be better understood on reading the following detailed description of an example of non-limiting implementation of the invention, and on examining the appended drawing, in which:
  • the figure 1 illustrates, schematically and partially, various elements of an optical unit according to an exemplary implementation of the invention,
  • the figure 2 represents, schematically and partially, the geometric sectional profile of the lens of the unit of the figure 1 ,
  • the Figures 3 and 4 illustrate the variation of characteristic magnitudes of the profile of the lens of the unit of the figure 1 ,
  • the figure 5 represents, schematically and partially, intercepted by a screen perpendicular to the optical axis, a beam obtained thanks to the lens of the unit of the figure 1 , without the presence of the reflector,
  • the Figures 6 and 7 represent, schematically and partially, in section, the transmitter and the reflector of the optical unit of the figure 1 , and
  • the figure 8 represents, schematically and partially, intercepted by a screen perpendicular to the optical axis, a beam obtained thanks to the lens of the unit of the figure 1 , with the presence of the reflector.

On a représenté sur la figure 1 une unité optique 1 pour un dispositif D d'éclairage de véhicule automobile, agencée pour produire un faisceau de lumière complémentaire FC destiné à être utilisé avec un faisceau de lumière principal produit par une autre unité optique 30, ce faisceau complémentaire FC présentant une coupure C sensiblement plate (voir coupure C sur les figures 5 et 8).We have shown on the figure 1 an optical unit 1 for a motor vehicle lighting device D, arranged to produce a complementary light beam FC intended to be used with a main light beam produced by another optical unit 30, this complementary beam FC having a cutoff C substantially flat (see cut C on the Figures 5 and 8 ).

L'unité optique 30 peut éventuellement être à LED.The optical unit 30 may optionally be LED.

Le faisceau complémentaire FC peut être un faisceau complémentaire autoroute, relativement mince et étalé, qui ne soit pas en forme de « banane », et le faisceau principal peut être un faisceau code.The complementary beam FC may be a complementary, relatively thin and spreading free-form motorway beam, which is not in the form of a "banana", and the main beam may be a code beam.

Dans une variante non illustrée, il est possible d'agencer le dispositif pour lui permettre de produire un faisceau de mauvais temps, par exemple de classe W.In a variant not illustrated, it is possible to arrange the device to enable it to produce a bad weather beam, for example class W.

Cette unité 1 comporte :

  • une source de lumière 2 à émission lumineuse sensiblement isotrope ou lambertienne, formée dans l'exemple décrit par une LED,
  • une lentille 3 présentant un foyer objet F et un foyer image, ce foyer image étant à l'infini, cette lentille 3 étant associée à la source de lumière 2 pour produire le faisceau complémentaire FC, cette lentille comportant une face ondulée 4, de forme différente d'une face de lentille stigmatique pure, agencée pour obtenir le faisceau complémentaire FC.
This unit 1 comprises:
  • a light source 2 with a substantially isotropic or lambertian light emission, formed in the example described by an LED,
  • a lens 3 having an object focus F and an image focus, this image focus being at infinity, this lens 3 being associated with the light source 2 to produce the complementary beam FC, this lens having a corrugated surface 4, of shape different from a pure stigmatic lens face, arranged to obtain the complementary beam FC.

Comme on le voit sur les figures 5 et 8, la coupure C est formée par des bords latéraux BL qui sont redressés, à savoir sensiblement parallèles à une ligne horizontale, et non tombants par rapport à cette ligne horizontale.As we see on the Figures 5 and 8 , the cut C is formed by lateral edges BL which are straightened, namely substantially parallel to a horizontal line, and not falling relative to this horizontal line.

La lentille 3 présente une surface géométrique de base SB, surface qui est fictive, correspondant notamment à une face de sortie d'une lentille rigoureusement stigmatique (voir figure 2).The lens 3 has a basic geometrical surface SB, which surface is fictitious, corresponding in particular to an exit face of a rigorously stigmatic lens (see FIG. figure 2 ).

La face ondulée 4 de la lentille 3 comporte des ondulations 5 de pente variable, cette pente étant mesurée par rapport à la surface géométrique de base SB, cette pente étant d'autant plus grande que l'ondulation 5 est éloignée d'un centre CO de la lentille, de manière à produire une seule zone d'éclairement maximal ZMax dans le faisceau complémentaire FC (voir figures 5 et 8).The corrugated face 4 of the lens 3 comprises corrugations 5 of variable slope, this slope being measured relative to the basic geometric surface SB, this slope being all the greater as the corrugation 5 is moved away from a center CO of the lens, so as to produce a single zone of maximum illumination ZMax in the complementary beam FC (see FIG. Figures 5 and 8 ).

L'invention permet ainsi d'éviter l'apparition, dans le faisceau complémentaire FC, de plusieurs maxima locaux d'éclairement et donc de tâches lumineuses distinctes (susceptibles d'occasionner des gênes pour le conducteur du véhicule). L'invention permet ainsi de rendre ce faisceau complémentaire FC relativement homogène.The invention thus makes it possible to avoid the appearance, in the complementary bundle FC, of several local illumination maxima and thus of distinct light tasks (which may cause discomfort for the driver of the vehicle). The invention thus makes it possible to make this complementary bundle FC relatively homogeneous.

Dans l'exemple considéré, l'unité optique présente un axe optique Ox (voir figure 6), et chaque ondulation 5 est formée sur une strie 7 de la lentille 3, chaque strie 7 s'étendant de manière sensiblement rectiligne lorsque la lentille 3 est observée suivant l'axe optique Ox.In the example under consideration, the optical unit has an optical axis Ox (see figure 6 ), and each undulation 5 is formed on a strip 7 of the lens 3, each strip 7 extending substantially rectilinearly when the lens 3 is observed along the optical axis Ox.

Les ondulations 5 sont sensiblement parallèles entre elles.The corrugations 5 are substantially parallel to each other.

L'amplitude des ondulations 5 est croissante au fur et à mesure que l'ondulation considérée est éloignée du centre CO de la lentille 3.The amplitude of the corrugations 5 is increasing as the undulation considered is remote from the center CO of the lens 3.

Cette amplitude est de préférence mesurée par rapport à la surface géométrique de base SB (qui est fictive) de la lentille 3.This amplitude is preferably measured with respect to the base geometrical surface SB (which is fictitious) of the lens 3.

La lentille 3 est agencée pour donner, d'un point lumineux ponctuel situé à son foyer objet F, une ligne lumineuse sensiblement horizontale lorsque les ondulations de la lentille sont placées de manière sensiblement verticale.The lens 3 is arranged to give, from a point light point located at its object focus F, a substantially horizontal light line when the corrugations of the lens are placed substantially vertically.

La face ondulée 4 de la lentille 3 est agencée, dans l'unité 1, comme face de sortie de la lumière.The corrugated face 4 of the lens 3 is arranged in the unit 1 as the exit face of the light.

L'autre face 9 de la lentille 3, opposée à la face 4, est par exemple plane. Ceci permet notamment de réduire sensiblement les aberrations.The other face 9 of the lens 3, opposite the face 4, is for example flat. This notably makes it possible to reduce the aberrations substantially.

La lentille 3 (dont la surface géométrique fictive de base SB définit une lentille stigmatique) reçoit sur sa face de sortie 4 les modulations 5, lesquelles ne dépendent que de la coordonnée latérale et varient de telle sorte que les quantités de flux lumineux déviées vers la gauche et la droite soient équilibrées (afin d'éviter que les demies lentilles gauche et droite aient des maxima d'intensité lumineuse décalés par rapport à H = 0, ce qui donnerait un faisceau total inhomogène avec deux maxima d'intensité, de part et d'autre de H = 0).The lens 3 (whose fictitious geometric base surface SB defines a stigmatic lens) receives on its output face 4 the modulations 5, which depend only on the lateral coordinate and vary so that the amounts of luminous flux deflected towards the left and right are balanced (in order to avoid that the left and right half lenses have luminous intensity maxima offset with respect to H = 0, which would give an inhomogeneous total beam with two intensity maxima, from other than H = 0).

H est l'angle d'une direction d'observation du faisceau avec un plan vertical contenant l'axe optique.H is the angle of an observation direction of the beam with a vertical plane containing the optical axis.

Soit M[X,Y,Z]=F(u,v) une équation paramétrique de la surface de sortie 4 de la lentille stigmatique de base (équation pouvant être établie par l'homme de l'art pour un tirage, une face d'entrée et un matériau donnés ; dans l'exemple qui suit le tirage est de 70 mm, la face d'entrée est plane et le matériau est du PMMA).Let M [X, Y, Z] = F (u, v) be a parametric equation of the exit surface 4 of the basic stigmatic lens (an equation that can be established by those skilled in the art for a draw, a face input and a given material, in the following example the draft is 70 mm, the input face is flat and the material is PMMA).

On considère : axe des x = axe optique, axe des z = verticale.We consider: axis of x = optical axis, axis of z = vertical.

L'équation de la face de sortie 4 de la lentille 3 de l'invention est de la forme m[x,y,z]=F(u,v)+f(u,v)
où f(u,v)=[δ x(Y(u,v)),0,0] est une fonction pseudo périodique de Y et où, pour tout Y1 tel que ∂ 2 ⁢ δ ⁢ x ∂ Y 2 Y 1 = 0

Figure imgb0001
et ∂ δ ⁢ x ∂ Y Y 1 > 0
Figure imgb0002
 et pour tout Y2 tel que ∂ 2 ⁢ δ ⁢ x ∂ Y 2 Y 2 = 0
Figure imgb0003
 et ∂ δ ⁢ x ∂ Y Y 1 < 0 ,
Figure imgb0004
 Y 1 < Y 2 ⇒ ∂ δ ⁢ x ∂ Y Y 1 < - ∂ δ ⁢ x ∂ Y Y 2
Figure imgb0005
 The equation of the exit face 4 of the lens 3 of the invention is of the form m [x, y, z] = F (u, v) + f (u, v)
where f (u, v) = [δ x (Y (u, v)), 0,0] is a pseudo periodic function of Y and where, for any Y1 such as ∂ 2 ⁢ δ ⁢ x ∂ Y 2 Y 1 = 0
Figure imgb0001
 and ∂ δ ⁢ x ∂ Y Y 1 > 0
Figure imgb0002
 and for all Y2 such as ∂ 2 ⁢ δ ⁢ x ∂ Y 2 Y 2 = 0
Figure imgb0003
 and ∂ δ ⁢ x ∂ Y Y 1 < 0 ,
Figure imgb0004
 Y 1 < Y 2 ⇒ ∂ δ ⁢ x ∂ Y Y 1 < - ∂ δ ⁢ x ∂ Y Y 2
Figure imgb0005

La fonction de modulation δ x est alors telle que les déviations soient plus grandes du côté correspondant aux zones de la lentille 3 les plus éloignées de l'axe (et recevant alors moins de flux).The modulation function δ x is then such that the deviations are greater on the side corresponding to the zones of the lens 3 furthest away from the axis (and thus receiving less flux).

La fonction simple suivante (représentée graphiquement sur la figure 3) répond aux conditions (et est utilisée dans l'exemple de réalisation) : δ ⁢ x = δ ⋅ sin 2 ⁢ π ⁢ Y L ⋅ Y R p

Figure imgb0006

où L est une largeur de strie, R le rayon de la lentille, δ une amplitude de modulation et p un réel positif (L = 6, R = 30, δ = 0,25, p = 0,9 dans l'exemple de réalisation).The following simple function (represented graphically on the figure 3 ) meets the conditions (and is used in the exemplary embodiment): δ ⁢ x = δ ⋅ sin 2 ⁢ π ⁢ Y The ⋅ Y R p
Figure imgb0006
where L is a streak width, R is the radius of the lens, δ is a modulation amplitude and p is a positive real (L = 6, R = 30, δ = 0.25, p = 0.9 in the example of production).

∂ δ ⁢ x ∂ Y

Figure imgb0007
(Y) est représenté graphiquement sur la figure 4. ∂ δ ⁢ x ∂ Y
Figure imgb0007
 ( Y ) is represented graphically on the figure 4 .

Il convient de noter qu'une modulation sinusoïdale simple ne conviendrait pas car la condition (*) ci-dessus ne serait pas respectée (on obtiendrait alors deux maxima locaux de part et d'autre du plan H=0).It should be noted that a simple sinusoidal modulation would not be appropriate because the condition (*) above would not be respected (one would then obtain two local maxima on both sides of the plane H = 0).

La LED 2 est à émetteur 10 lumineux plan, le plan de cet émetteur 10 s'étendant de manière inclinée par rapport à l'axe optique Ox, comme on peut le voir sur la figure 6. De préférence, le plan de l'émetteur 10 n'est ni perpendiculaire ni parallèle à l'axe optique.The LED 2 has a plane light emitter 10, the plane of this emitter 10 extending inclined with respect to the optical axis Ox, as can be seen in FIG. figure 6 . Preferably, the plane of the emitter 10 is neither perpendicular nor parallel to the optical axis.

Le foyer objet F de la lentille 3 est placé sensiblement au centre d'un bord inférieur 11 de l'émetteur 10 de la source de lumière 2.The object focus F of the lens 3 is placed substantially in the center of a lower edge 11 of the emitter 10 of the light source 2.

Dans l'exemple décrit, la lentille 3 présente un pourtour 12 sensiblement circulaire.In the example described, the lens 3 has a substantially circular periphery 12.

L'unité optique présente un haut et un bas lorsqu'elle est en place sur le véhicule.The optical unit has a top and a bottom when in place on the vehicle.

Cette unité 1 comporte en outre, pour notamment améliorer la fusion des faisceaux principal et complémentaire, un réflecteur 15 placé dans l'unité 1, afin d'intercepter au moins une partie des rayons lumineux provenant de l'émetteur 10 de la source de lumière 2 de manière à créer une image étalée vers le haut et défocalisée vers l'arrière, image qui, projetée et étalée par la lentille, vient compléter le faisceau complémentaire vers le bas (voir figure 8).This unit 1 further comprises, in particular for improving the fusion of the main and complementary beams, a reflector 15 placed in the unit 1, in order to intercept at least a portion of the light rays coming from the emitter 10 of the light source. 2 so as to create an image spread upwards and defocused towards the rear, image which, projected and spread by the lens, completes the complementary beam downwards (see figure 8 ).

Le bord arrière 21 du réflecteur 15 définit avec le bord supérieur de l'émetteur 10 une distance d non nulle, qui dans l'exemple décrit, dépend de l'encapsulation de la LED. Cette distance d est caractéristique de la zone de l'émetteur 10 qui est cachée vis-à-vis du réflecteur 15.The rear edge 21 of the reflector 15 defines with the upper edge of the transmitter 10 a non-zero distance d, which in the example described, depends on the encapsulation of the LED. This distance d is characteristic of the zone of the emitter 10 which is hidden vis-à-vis the reflector 15.

Dans l'exemple décrit, l'unité optique 1 présente un axe Oy transversal à l'axe optique Ox et s'étendant sensiblement horizontalement lorsque l'unité 1 est montée sur le véhicule.In the example described, the optical unit 1 has an axis Oy transverse to the optical axis Ox and extending substantially horizontally when the unit 1 is mounted on the vehicle.

Le réflecteur 15 présente une forme sensiblement en secteur de cylindre d'axe transversal Oy.The reflector 15 has a shape substantially in cylinder sector of transverse axis Oy.

Le réflecteur 15 comporte un bord avant 22 situé entre la lentille 3 et la source de lumière 2.The reflector 15 has a front edge 22 located between the lens 3 and the light source 2.

Dans l'exemple considéré, le réflecteur 15 est placé de manière à ne pas cacher le bas de l'émetteur 10, qui doit être vu depuis toute la face d'entrée 9 de la lentille 3 (afin de ne pas diminuer l'intensité sous la coupure) et de manière à recouvrir une fraction du haut de l'émetteur 10 (vu depuis la face d'entrée 9 de la lentille) pour permettre une bonne fusion du faisceau qu'il crée et du faisceau principal (en lumière directe).In the example considered, the reflector 15 is placed so as not to hide the bottom of the transmitter 10, which must be seen from the entire input face 9 of the lens 3 (in order not to decrease the intensity under the cut) and so as to cover a fraction of the top of the transmitter 10 (seen from the input face 9 of the lens) to allow a good fusion of the beam it creates and the main beam (in direct light ).

Ce réflecteur 15 peut ainsi prendre la forme d'un cylindre d'axe transverse Oy, plus long que l'émetteur. La section droite du cylindre peut être une parabole ou une courbe spline par exemple de degré 3 qui l'approche (et permet, par le réglage des tensions à ses extrémités, d'ajuster la forme du faisceau).This reflector 15 can thus take the form of a transverse axis cylinder Oy, longer than the emitter. The cross section of the cylinder may be a parabola or a spline curve for example of degree 3 which approaches it (and allows, by adjusting the voltages at its ends, to adjust the shape of the beam).

Pour la section droite du réflecteur 15, il est possible de prendre un arc parabolique de même foyer que la lentille 3, passant par P et arrêté sur, ou un peu avant, la ligne limite ou une spline (voir figure 7).For the cross section of the reflector 15, it is possible to take a parabolic arc of the same focus as the lens 3, passing through P and stopped on or shortly before the boundary line or a spline (see figure 7 ).

Dans un exemple de mise en oeuvre de l'invention, le dispositif est agencé de manière à ce que le faisceau complémentaire soit allumé seulement lorsque le véhicule roule à une vitesse supérieure à un seuil prédéterminé (non nul), ce seuil étant par exemple sensiblement égal à 110 km/h.In an exemplary implementation of the invention, the device is arranged so that the complementary beam is lit only when the vehicle is traveling at a speed greater than a predetermined threshold (non-zero), this threshold being for example substantially equal to 110 km / h.

Claims (14)

Unité optique, notamment pour dispositif de signalisation et/ou d'éclairage de véhicule automobile, agencée pour produire un faisceau de lumière complémentaire (FC) destiné à être utilisé avec un faisceau de lumière principal, ce faisceau complémentaire présentant une coupure (C) notamment sensiblement plate, cette unité comportant : - au moins une source de lumière (2) à émission lumineuse sensiblement isotrope ou lambertienne, notamment une LED, - au moins une lentille (3) associée à cette source de lumière pour participer à la production du faisceau complémentaire, cette lentille comportant une face ondulée agencée pour obtenir le faisceau complémentaire avec des bords latéraux (BL) redressés. Optical unit, especially for a motor vehicle signaling and / or lighting device, arranged to produce a complementary light beam (FC) intended to be used with a main light beam, this complementary beam having a cutoff (C) in particular substantially flat, this unit comprising: at least one light source (2) with a substantially isotropic or lambertian light emission, in particular an LED, - At least one lens (3) associated with this light source to participate in the production of the complementary beam, this lens having a corrugated face arranged to obtain the complementary beam with side edges (BL) rectified. Unité selon la revendication précédente, caractérisée par le fait que la lentille présente une surface géométrique de base (SB) correspondant notamment à une face de sortie d'une lentille rigoureusement stigmatique, et caractérisée par le fait que la face ondulée (4) de la lentille comporte des ondulations (5) de pente variable, cette pente étant mesurée par rapport à la surface géométrique de base, cette pente étant de préférence d'autant plus grande que l'ondulation est éloignée d'un centre de la lentille, pour produire une seule zone d'éclairement maximal (ZMax) dans le faisceau complémentaire.Unit according to the preceding claim, characterized in that the lens has a basic geometrical surface (SB) corresponding in particular to an exit face of a rigorously stigmatic lens, and characterized in that the undulating face (4) of the lens comprises corrugations (5) of variable slope, this slope being measured relative to the basic geometrical surface, this slope preferably being all the greater as the undulation is removed from a center of the lens, to produce a single zone of maximum illumination (ZMax) in the complementary beam. Unité selon la revendication précédente, l'unité présentant un axe optique (Ox), caractérisée par le fait que chaque ondulation est formée sur une strie (7), cette strie s'étendant de préférence de manière sensiblement rectiligne lorsque la lentille est observée suivant l'axe optique.Unit according to the preceding claim, the unit having an optical axis (Ox), characterized in that each undulation is formed on a strip (7), this strip preferably extending substantially rectilinearly when the lens is observed next the optical axis. Unité selon l'une des deux revendications précédentes, caractérisée par le fait que l'amplitude des ondulations (5) est croissante au fur et à mesure que l'ondulation considérée est éloignée du centre (CO) de la lentille.Unit according to one of the two preceding claims, characterized in that the amplitude of the corrugations (5) is increasing as the undulation considered is removed from the center (CO) of the lens. Unité selon l'une des trois revendications précédentes, caractérisée par le fait que la lentille (3) est agencée pour donner, d'un point lumineux ponctuel situé à son foyer objet, une ligne lumineuse sensiblement horizontale lorsque les ondulations de la lentille sont placées de manière sensiblement verticale.Unit according to one of the three preceding claims, characterized in that the lens (3) is arranged to give, from a point of light point located at its object focus, a substantially horizontal light line when the ripples of the lens are placed substantially vertically. Unité selon l'une des quatre revendications précédentes, caractérisée par le fait que la face ondulée (4) de la lentille est agencée comme face de sortie de la lumière.Unit according to one of the four preceding claims, characterized in that the corrugated face (4) of the lens is arranged as the exit face of the light. Unité selon l'une des revendications précédentes, caractérisée par le fait que la source de lumière comporte une LED à émetteur lumineux plan (10), le plan de cet émetteur s'étendant avantageusement de manière inclinée par rapport à l'axe optique (Ox).Unit according to one of the preceding claims, characterized in that the light source comprises a planar light emitter LED (10), the plane of this emitter extending advantageously inclined with respect to the optical axis (Ox). ). Unité selon l'une des revendications précédentes, caractérisée par le fait que le foyer objet (F) de la lentille est placé au centre d'un bord inférieur (11) de l'émetteur de la source de lumière.Unit according to one of the preceding claims, characterized in that the object focus (F) of the lens is placed in the center of a lower edge (11) of the emitter of the light source. Unité selon l'une des revendications précédentes, l'unité présentant un haut et un bas lorsqu'elle est en place sur le véhicule, caractérisée par le fait qu'elle comporte en outre un réflecteur (15) placé dans l'unité, afin d'intercepter au moins une partie des rayons lumineux provenant de la source de lumière de manière à créer une image étalée vers le haut et défocalisée, image qui, projetée et étalée par la lentille, vient compléter le faisceau complémentaire vers le bas.Unit according to one of the preceding claims, the unit having a top and a bottom when it is in place on the vehicle, characterized in that it further comprises a reflector (15) placed in the unit, so intercepting at least a portion of the light rays from the light source so as to create an upwardly defocused image, which image, projected and spread by the lens, completes the complementary beam downwardly. Unité selon la revendications précédente, présentant un axe (Oy) transversal à l'axe optique et s'étendant sensiblement horizontalement lorsque l'unité est montée sur le véhicule, caractérisée par le fait que le réflecteur (15) présente une forme sensiblement en secteur de cylindre d'axe transversal (y).Unit according to the preceding claim, having an axis (Oy) transverse to the optical axis and extending substantially horizontally when the unit is mounted on the vehicle, characterized in that the reflector (15) has a substantially cylindrical sector shape of transverse axis (y). Unité selon l'une des deux revendications précédentes, caractérisée par le fait que le réflecteur comporte un bord avant (22) situé entre la lentille et la source de lumière.Unit according to one of the two preceding claims, characterized in that the reflector comprises a front edge (22) located between the lens and the light source. Dispositif d'éclairage et/ou de signalisation, notamment de véhicule automobile, comportant : - une unité optique principale (30) capable de produire un faisceau de lumière principal, notamment un faisceau de croisement, - une unité optique (1) selon l'une des revendications précédentes, capable de produire un faisceau complémentaire (FC) présentant une coupure notamment sensiblement plate, les faisceaux principal et complémentaire formant un faisceau global, ce faisceau global étant notamment un faisceau autoroute, de portée de préférence supérieure ou égale à 100 mètres. Lighting and / or signaling device, in particular for a motor vehicle, comprising: a main optical unit (30) capable of producing a main beam of light, in particular a passing beam, - An optical unit (1) according to one of the preceding claims, capable of producing a complementary beam (FC) having a particularly flat cutoff, the main and complementary beams forming a global beam, the overall beam being in particular a motorway beam, with a range of preferably greater than or equal to 100 meters. Dispositif selon la revendication précédente, caractérisé par le fait qu'il est agencé de manière à ce que le faisceau complémentaire soit allumé seulement lorsque le véhicule roule à une vitesse supérieure à un seuil prédéterminé (non nul), ce seuil étant par exemple sensiblement égal à 110 km/h.Device according to the preceding claim, characterized in that it is arranged so that the complementary beam is lit only when the vehicle is traveling at a speed greater than a predetermined threshold (non-zero), this threshold being for example substantially equal at 110 km / h. Procédé pour produire un faisceau lumineux, notamment un faisceau autoroute, pour véhicule automobile, notamment à l'aide d'une unité optique (10) selon l'une des revendications 1 à 11, ce procédé comportant l'étape suivante : - générer un faisceau complémentaire notamment à coupure sensiblement plate et ayant une unique zone d'éclairement maximal. A method for producing a light beam, in particular a motorway beam, for a motor vehicle, in particular using an optical unit (10) according to one of claims 1 to 11, this method comprising the following step: generating a complementary beam, in particular with a substantially flat cut and having a single maximum illumination zone.
EP12155491.9A 2011-02-15 2012-02-15 Optical unit for a signalling and / or lighting device Active EP2489925B1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013104785A1 (en) * 2012-01-12 2013-07-18 Valeo Vision Lens for an optical module of a motor vehicle
FR3004786A1 (en) * 2013-04-17 2014-10-24 Valeo Vision LENS, OPTICAL MODULE AND LIGHTING AND / OR SIGNALING DEVICE FOR MOTOR VEHICLE
EP3246621A1 (en) * 2016-05-18 2017-11-22 Valeo Vision Cut-out rectifying dioptre
WO2018177757A1 (en) * 2017-03-29 2018-10-04 Docter Optics Se Headlight lens for a motor vehicle headlight

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US3578966A (en) * 1969-11-05 1971-05-18 Sylvania Electric Prod Vehicle driving light
DE202005004080U1 (en) * 2005-03-14 2005-07-07 Zizala Lichtsysteme Gmbh Lens for vehicle headlamp has laterally adjacent elongated recesses and/or raised sections extending essentially from above downwards along surface of optical element on convex front side of lens
US20050200976A1 (en) * 2002-06-14 2005-09-15 Ralf Bonitz Optical lens soft-focus effect
WO2006033040A1 (en) * 2004-09-20 2006-03-30 Koninklijke Philips Electronics N.V. Led collimator element with a semiparabolic reflector
EP1762776A1 (en) 2005-09-09 2007-03-14 Valeo Vision Method for the manufacturing of a module or a vehicle headlamp
GB2436691A (en) * 2006-03-28 2007-10-03 Visteon Global Tech Inc LED projector headlamps using single or multi-faceted lenses
FR2902496A1 (en) * 2006-02-17 2007-12-21 Automotive Lighting Reutlingen LIGHTING INSTALLATION FOR VEHICLE
EP1970619A1 (en) * 2007-03-14 2008-09-17 Valeo Vision Optical module for headlights of an automobile

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Publication number Priority date Publication date Assignee Title
US3578966A (en) * 1969-11-05 1971-05-18 Sylvania Electric Prod Vehicle driving light
US20050200976A1 (en) * 2002-06-14 2005-09-15 Ralf Bonitz Optical lens soft-focus effect
WO2006033040A1 (en) * 2004-09-20 2006-03-30 Koninklijke Philips Electronics N.V. Led collimator element with a semiparabolic reflector
DE202005004080U1 (en) * 2005-03-14 2005-07-07 Zizala Lichtsysteme Gmbh Lens for vehicle headlamp has laterally adjacent elongated recesses and/or raised sections extending essentially from above downwards along surface of optical element on convex front side of lens
EP1762776A1 (en) 2005-09-09 2007-03-14 Valeo Vision Method for the manufacturing of a module or a vehicle headlamp
FR2902496A1 (en) * 2006-02-17 2007-12-21 Automotive Lighting Reutlingen LIGHTING INSTALLATION FOR VEHICLE
GB2436691A (en) * 2006-03-28 2007-10-03 Visteon Global Tech Inc LED projector headlamps using single or multi-faceted lenses
EP1970619A1 (en) * 2007-03-14 2008-09-17 Valeo Vision Optical module for headlights of an automobile

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013104785A1 (en) * 2012-01-12 2013-07-18 Valeo Vision Lens for an optical module of a motor vehicle
US9328888B2 (en) 2012-01-12 2016-05-03 Valeo Vision Lens for an optical module of a motor vehicle
FR3004786A1 (en) * 2013-04-17 2014-10-24 Valeo Vision LENS, OPTICAL MODULE AND LIGHTING AND / OR SIGNALING DEVICE FOR MOTOR VEHICLE
EP3246621A1 (en) * 2016-05-18 2017-11-22 Valeo Vision Cut-out rectifying dioptre
FR3051537A1 (en) * 2016-05-18 2017-11-24 Valeo Vision DIOPTER RECTIFIER
WO2018177757A1 (en) * 2017-03-29 2018-10-04 Docter Optics Se Headlight lens for a motor vehicle headlight
CN110337565A (en) * 2017-03-29 2019-10-15 博士光学欧洲股份公司 Headlamp lens for automotive headlight
US10914443B2 (en) 2017-03-29 2021-02-09 Docter Optics Se Headlight lens for a motor vehicle headlight
CN110337565B (en) * 2017-03-29 2022-06-21 博士光学欧洲股份公司 Headlight lens for a motor vehicle headlight

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FR2971464A1 (en) 2012-08-17
EP2489925B1 (en) 2021-10-20
FR2971464B1 (en) 2014-11-28

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