[go: up one dir, main page]

EP0581661A1 - Method of manufacturing a mirror for vehicle headlights or vehicle signalling devices and headlamp with such a mirror - Google Patents

Method of manufacturing a mirror for vehicle headlights or vehicle signalling devices and headlamp with such a mirror Download PDF

Info

Publication number
EP0581661A1
EP0581661A1 EP93401930A EP93401930A EP0581661A1 EP 0581661 A1 EP0581661 A1 EP 0581661A1 EP 93401930 A EP93401930 A EP 93401930A EP 93401930 A EP93401930 A EP 93401930A EP 0581661 A1 EP0581661 A1 EP 0581661A1
Authority
EP
European Patent Office
Prior art keywords
mirror
base
points
corrected
pbn
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP93401930A
Other languages
German (de)
French (fr)
Other versions
EP0581661B1 (en
Inventor
François Lopez
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
Original Assignee
Valeo Vision SAS
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 Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP0581661A1 publication Critical patent/EP0581661A1/en
Application granted granted Critical
Publication of EP0581661B1 publication Critical patent/EP0581661B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • 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
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/338—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector having surface portions added to its general concavity
    • 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
    • F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors

Definitions

  • the present invention relates to lighting or signaling devices for motor vehicles.
  • a widely known solution to this problem consists in providing on the ice, globe or indicator of the lighting or signaling device prisms, balls or streaks intended to effect a deflection of the light in particular to "burst" the excessively concentrated light, and as a corollary to add light in areas that are too dim.
  • the present invention aims to overcome these drawbacks of the prior art. It is based on the idea consisting, starting from a known reflective surface, determined for example by one or more mathematical equations, to randomly modify this surface, preferably with a well-defined step and standard deviation.
  • the invention relates to a lighting or signaling device for a motor vehicle, of the type comprising a light source, a mirror comprising a reflecting surface and a globe, indicator or glass, the reflecting surface being designed to generate a homogeneous beam, characterized in that, for any correlated set of points situated in at least one zone of said reflecting surface, images of the source formed by these points are distributed on a projection screen in a non-correlated manner with respect to each other to others.
  • FIG. 1 represents in section a part of a surface Sb conventionally intended to define the reflecting surface of a mirror of a lighting or signaling device of a motor vehicle.
  • Such a surface can usually be a quadric, in particular a paraboloid, or even a surface as defined for example in one of the French patent applications published Nos. 2 536 502, 2 536 503, 2 597 575, 2 599 120, 2 599 121, 2 600 024, 2 602 305, 2 602 306, 2 609 146, 2 609 148, 2 622 676, 2 634 004, 2 639 888 and 2,664,677 in the name of the Claimant.
  • such a surface is designed mainly for the purpose of acting on the position of at least certain images of the filament produced by this surface in order to obtain a light beam meeting certain criteria in terms of light distribution (position of a cut, position of a concentration spot, beam thickness, ).
  • the surface Sb is defined either in the form of one or more mathematical equations, in parametric, Cartesian, polar, etc. coordinates, or in the form of a game of N point coordinates of this surface.
  • a plurality of base points denoted Pbi-3, Pbi-2, ...., Pbi + 3 are defined on the surface S1, or on one or more determined zones of this surface.
  • These points, all designated by Pbn in the following description, for the sake of simplification, are preferably regularly distributed according to a predetermined pattern, for example square, rectangle, triangle, etc.
  • these dots correspond to a regular square pattern, the pitch P of which may for example have a value between 0.5 and 15 mm, more preferably between 2 and 10 mm.
  • each base point Pbn there is determined from each base point Pbn a corrected point Pcn, which is located on the normal Nn so that the distance Dn between Pbn and Pcn according to this normal is random or pseudo-random.
  • this distance Dn can be both positive and negative, a positive distance corresponding to the case where the point Pcn is located in front of the base surface (upwards in FIG. 1), and a negative distance corresponding to the case where the point Pcn is situated behind the base surface (downwards in FIG. 1).
  • the distribution of the distances Di from one point to the other is a Gaussian distribution, centered on the value zero and whose standard deviation is a function of the pitch P of the points Pbn and preferably between 25 and 750 wm, more preferably between 100 and 500 wm.
  • the corrected points Pcn being all determined, we now determine a corrected surface Sc having the properties of passing through all the corrected points Pcn while being continuous and preferably differentiable.
  • the above steps are carried out at least partially automatically using conventional computer-aided design equipment. These steps make it possible to obtain in a technically exploitable form either a set of point coordinates, distributed at least as finely as the points Pcn, or one or more equations satisfying the criteria defined above.
  • FIG. 5 illustrates, by a set of isocandela curves C, the configuration of a signaling beam obtained with a mirror produced in accordance with the teachings of the aforementioned patent application FR-A-2 609 146.
  • a spot of relatively marked TC concentration very narrow and extending over practically the entire height of the beam, which is not not desirable.
  • FIG. 6 illustrates in the same form the configuration of the beam obtained when the mirror, of the same basic design, has been treated according to the present invention.
  • the isocandela curves are indicated in C 'and the concentration spot in TC'.
  • the present invention applies not only to mirror signaling lights (in particular reversing lights, stop lights, rear fog lights, as well as position lights and flashing lights), but also to searchlights.
  • the concepts of the present invention can be implemented either on the whole of the reflecting surface of a mirror, or on only a part of this surface, and in particular in the part which is at the origin of a excess concentration of part of the beam.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

A method of manufacture of a mirror for a lighting or signalling device for a vehicle is characterised in that it comprises the following steps: - defining a base reflecting surface (Sb), - distributing base points (Pbn), spaced apart from each other, in at least one region of this surface, - assigning to each base point (Pbn) a randomly determined corrective offset, in order each time to create a corrected point (Pcn) situated on the normal (Nn) to the base surface at the said base point and at a random distance (Dn) from the said base point, - defining, in the said region, a corrected smooth surface (Sc) passing through the corrected points (Pcn), and - producing a mirror in which the said region of the reflecting surface is constituted by the said corrected smooth surface. The invention also relates to a headlamp equipped with a mirror having random image distribution properties. Application to the homogenisation of the light beam. <IMAGE>

Description

La présente invention concerne les dispositifs d'éclairage ou de signalisation pour véhicules automobiles.The present invention relates to lighting or signaling devices for motor vehicles.

Dans de nombreux dispositifs d'éclairage ou de signalisation, et en particulier dans les feux de signalisation, on cherche à obtenir un faisceau dans lequel les variations d'intensité lumineuse d'un point à l'autre soient aussi régulières que possible.In many lighting or signaling devices, and in particular in signaling lights, it is sought to obtain a beam in which the variations in light intensity from one point to another are as regular as possible.

Avec les dispositifs d'éclairage à miroir récupérateur, il s'avère difficile d'obtenir cette homogénéité, car on constate en particulier que certains points du miroir peuvent produire des images de la source qui sont extrêmement rapprochées les unes des autres, donnant lieu à des taches de concentration lumineuse trop marquées.With recuperative mirror lighting devices, it proves difficult to obtain this homogeneity, since it is observed in particular that certain points of the mirror can produce images of the source which are extremely close to each other, giving rise to spots of light concentration too marked.

Une solution largement connue à ce problème consiste à prévoir sur la glace, globe ou voyant du dispositif d'éclairage ou de signalisation des prismes, billes ou stries destinés à effectuer une déviation de la lumière en particulier pour "éclater" la lumière excessivement concentrée, et en corollaire pour rajouter de la lumière dans les zones trop peu lumineuses.A widely known solution to this problem consists in providing on the ice, globe or indicator of the lighting or signaling device prisms, balls or streaks intended to effect a deflection of the light in particular to "burst" the excessively concentrated light, and as a corollary to add light in areas that are too dim.

Cette solution est cependant incompatible avec la tendance actuelle qui consiste, notamment pour des raisons esthétiques, à réaliser des glaces, globes ou voyants aussi lisses que possibles.This solution is however incompatible with the current trend which consists, in particular for aesthetic reasons, in making glasses, globes or sight glasses as smooth as possible.

Dans ce contexte, une autre solution qui vient spontanément à l'esprit de l'homme de l'art consiste à prévoir des stries, prismes, pavés individuels, etc... sur le miroir lui-même, de manière à conserver un contour de faisceau prédéterminé tout en assurant une plus grande homogénéité de la lumière au sein de ce contour.In this context, another solution which spontaneously comes to the mind of a person skilled in the art consists in providing streaks, prisms, individual blocks, etc. on the mirror itself, so as to maintain an outline of predetermined beam while ensuring greater homogeneity of the light within this contour.

Cette solution complique cependant la fabrication du miroir, et s'avère également inesthétique en ce que ces éléments déviateurs prévus sur le miroir donnent à celui-ci à travers la glace, lorsque le feu est éteint, un aspect irrégulier.This solution however complicates the manufacture of the mirror, and also proves to be unsightly in that these deflecting elements provided on the mirror give it through the glass, when the fire is out, an irregular appearance.

La présente invention vise à pallier ces inconvénients de la technique antérieure. Elle est basée sur l'idée consistant, à partird'une surface réfléchissante connue, déterminée par exemple par une ou plusieurs équations mathématiques, à modifier de façon aléatoire cette surface, de préférence avec un pas et un écart-type bien déterminés.The present invention aims to overcome these drawbacks of the prior art. It is based on the idea consisting, starting from a known reflective surface, determined for example by one or more mathematical equations, to randomly modify this surface, preferably with a well-defined step and standard deviation.

Ainsi l'invention propose selon un premier aspect un procédé de fabrication d'un miroir récupérateur de flux pour dispositif d'éclairage ou de signalisation pour véhicule automobile, caractérisé en ce qu'il comprend les étapes consistant à:

  • - définir une surface réfléchissante de base,
  • - effectuer dans au moins une zone de cette surface une répartition de points de base espacés les uns des autres,
  • - affecter à chaque point de base un décalage correctif déterminé aléatoirement, pour créer à chaque fois un point corrigé situé sur la normale à la surface de base audit point de base et à une distance aléatoire dudit point de base,
  • - définir dans ladite zone une surface lisse corrigée passant par les points corrigés, et
  • - réaliser un miroir dont ladite zone de la surface réfléchissante est constituée par ladite surface lisse corrigée.
Thus, the invention proposes, according to a first aspect, a method of manufacturing a flux recovery mirror for a lighting or signaling device for a motor vehicle, characterized in that it comprises the steps consisting in:
  • - define a basic reflective surface,
  • - carry out in at least one area of this surface a distribution of base points spaced from each other,
  • - assign a randomly determined corrective offset to each base point, to each time create a corrected point located on the normal to the base surface at said base point and at a random distance from said base point,
  • - define in said area a corrected smooth surface passing through the corrected points, and
  • - Make a mirror whose said area of the reflecting surface is constituted by said corrected smooth surface.

Dans la définition ci-dessus, le terme "aléatoire" peut s'entendre également comme "pseudo-aléatoire".In the above definition, the term "random" can also be understood as "pseudo-random".

Selon un deuxième aspect, l'invention concerne un dispositif d'éclairage ou de signalisation pour véhicule automobile, du type comprenant une source lumineuse, un miroir comportant une surface réfléchissante et un globe, voyant ou glace, la surface réfléchissante étant conçue pour engendrer un faisceau homogène, caractérisé en ce que, pour un ensemble corrélé quelconque de points situés dans au moins une zone de ladite surface réfléchissante, des images de la source formées par ces points sont distribuées sur un écran de projection de façon non corrélée les unes par rapport aux autres.According to a second aspect, the invention relates to a lighting or signaling device for a motor vehicle, of the type comprising a light source, a mirror comprising a reflecting surface and a globe, indicator or glass, the reflecting surface being designed to generate a homogeneous beam, characterized in that, for any correlated set of points situated in at least one zone of said reflecting surface, images of the source formed by these points are distributed on a projection screen in a non-correlated manner with respect to each other to others.

D'autres aspects, buts et avantages de la présente invention apparaîtront mieux à la lecture de la description détaillée suivante d'un mode de réalisation préféré de celle-ci, donnée à titre d'exemple et faite en référence au dessin annexé, sur lequel:

  • la figure 1 est une vue en coupe schématique d'une partie d'une surface réfléchissante réalisée selon la présente invention,
  • la figure 2 est une vue globale, illustrée par des ses traces dans des plans horizontaux et verticaux, d'une surface réfléchissante réalisée selon l'invention,
  • la figure 3 est une vue, sur un écran de projection, des contours d'un certain nombre d'images du filament incandescent obtenues avec un miroir selon l'art antérieur,
  • la figure 4 est une vue analogue à la figure 3, montrant la répartition d'images obtenue avec la présente invention,
  • la figure 5 illustre par un ensemble de courbes isocandéla sur un écran de projection, l'allure d'un faisceau obtenu avec un miroir nu selon l'art antérieur, et
  • la figure 6 illustre, de la même manière que sur la figure 5, l'allure d'un faisceau obtenu avec un miroir nu selon la présente invention.
Other aspects, objects and advantages of the present invention will appear better on reading the following detailed description of a preferred embodiment thereof, given by way of example and made with reference to the appended drawing, in which :
  • FIG. 1 is a schematic sectional view of part of a reflecting surface produced according to the present invention,
  • FIG. 2 is an overall view, illustrated by its traces in horizontal and vertical planes, of a reflecting surface produced according to the invention,
  • FIG. 3 is a view, on a projection screen, of the contours of a certain number of images of the incandescent filament obtained with a mirror according to the prior art,
  • FIG. 4 is a view similar to FIG. 3, showing the distribution of images obtained with the present invention,
  • FIG. 5 illustrates by a set of isocandela curves on a projection screen, the appearance of a beam obtained with a bare mirror according to the prior art, and
  • FIG. 6 illustrates, in the same way as in FIG. 5, the shape of a beam obtained with a bare mirror according to the present invention.

On notera préliminairement que les écarts, perpendiculairement à la surface réfléchissante, représentés sur les dessins, ont été exagérés par souci de clarté.It will be noted at the outset that the deviations, perpendicular to the reflecting surface, shown in the drawings, have been exaggerated for the sake of clarity.

La figure 1 représente en section une partie d'une surface Sb destinée conventionnellement à définir la surface réfléchissante d'un miroir de dispositif d'éclairage ou de signalisation de véhicule automobile.FIG. 1 represents in section a part of a surface Sb conventionally intended to define the reflecting surface of a mirror of a lighting or signaling device of a motor vehicle.

Une telle surface peut être usuellement une quadrique, notamment un paraboloïde, ou encore une surface telle que définie par exemple dans l'une des demandes de brevets français publiées Nos. 2 536 502, 2 536 503, 2 597 575, 2 599 120, 2 599 121, 2 600 024, 2 602 305, 2 602 306, 2 609 146, 2 609 148, 2 622 676, 2 634 004, 2 639 888 et 2 664 677 au nom de la Demanderesse.Such a surface can usually be a quadric, in particular a paraboloid, or even a surface as defined for example in one of the French patent applications published Nos. 2 536 502, 2 536 503, 2 597 575, 2 599 120, 2 599 121, 2 600 024, 2 602 305, 2 602 306, 2 609 146, 2 609 148, 2 622 676, 2 634 004, 2 639 888 and 2,664,677 in the name of the Claimant.

On rappellera qu'une telle surface est conçue principalement dans le but d'agir sur la position d'au moins certaines images du filament produites par cette surface pour obtenir un faisceau lumineux répondant à certains critères en matière de répartition lumineuse (position d'une coupure, position d'une tache de concentration, épaisseur de faisceau, ...).It will be recalled that such a surface is designed mainly for the purpose of acting on the position of at least certain images of the filament produced by this surface in order to obtain a light beam meeting certain criteria in terms of light distribution (position of a cut, position of a concentration spot, beam thickness, ...).

Pour la mise en oeuvre de la présente invention, il est préférable que la surface Sb soit définie soit sous forme d'une ou plusieurs équations mathématiques, en coordonnées paramétriques, cartésiennes, polaires, etc...,soit sous forme d'un jeu de N coordonnées ponctuelles de cette surface.For the implementation of the present invention, it is preferable that the surface Sb is defined either in the form of one or more mathematical equations, in parametric, Cartesian, polar, etc. coordinates, or in the form of a game of N point coordinates of this surface.

Selon la présente invention, on définit sur la surface S1, ou sur une ou plusieurs zones déterminées de cette surface, une pluralité de points de base notés Pbi-3, Pbi-2, ...., Pbi+3. Ces points, tous désignés par Pbn dans la suite de la description, par souci de simplification, sont de préférence régulièrement répartis selon un motif prédéterminé, par exemple en carré, en rectangle, en triangle, etc... En l'espèce, ces points correspondent à un motif carré régulier, dont le pas P peut avoir par exemple une valeur comprise entre 0,5 et 15 mm, plus préférentiellement entre 2 à 10 mm.According to the present invention, a plurality of base points denoted Pbi-3, Pbi-2, ...., Pbi + 3 are defined on the surface S1, or on one or more determined zones of this surface. These points, all designated by Pbn in the following description, for the sake of simplification, are preferably regularly distributed according to a predetermined pattern, for example square, rectangle, triangle, etc. In the present case, these dots correspond to a regular square pattern, the pitch P of which may for example have a value between 0.5 and 15 mm, more preferably between 2 and 10 mm.

A chaque point de base Pbn, il existe une normale Nn à la surface de base Sb.At each base point Pbn, there is a normal Nn at the base surface Sb.

Selon l'invention, on détermine à partir de chaque point de base Pbn un point corrigé Pcn, qui est situé sur la normale Nn de telle sorte que la distance Dn entre Pbn et Pcn selon cette normale soit aléatoire ou pseudo-aléatoire.According to the invention, there is determined from each base point Pbn a corrected point Pcn, which is located on the normal Nn so that the distance Dn between Pbn and Pcn according to this normal is random or pseudo-random.

Dans le présent exemple préféré, la valeur de cette distance Dn peut être aussi bien positive que négative, une distance positive correspondant au cas où le point Pcn est situé en avant de la surface de base (vers le haut sur la figure 1), et une distance négative correspondant au cas où le point Pcn est situé en arrière de la surface de base (vers le bas sur la figure 1 ).In the present preferred example, the value of this distance Dn can be both positive and negative, a positive distance corresponding to the case where the point Pcn is located in front of the base surface (upwards in FIG. 1), and a negative distance corresponding to the case where the point Pcn is situated behind the base surface (downwards in FIG. 1).

De préférence également, la répartition des distances Di d'un point à l'autre est une répartition gaussienne, centrée sur la valeur zéro et dont l'écart-type est fonction du pas P des points Pbn et de préférence compris entre 25 et 750 wm, plus préférentiellement entre 100 et 500 wm.Preferably also, the distribution of the distances Di from one point to the other is a Gaussian distribution, centered on the value zero and whose standard deviation is a function of the pitch P of the points Pbn and preferably between 25 and 750 wm, more preferably between 100 and 500 wm.

Les points corrigés Pcn étant tous déterminés, on détermine maintenant une surface corrigée Sc ayant pour propriétés de passer par tous les points corrigés Pcn tout en étant continue et de préférence dérivable.The corrected points Pcn being all determined, we now determine a corrected surface Sc having the properties of passing through all the corrected points Pcn while being continuous and preferably differentiable.

Il existe un certain nombre de techniques mathématiques classiques pour réaliser une une surface Sc selon ces critères, à partir de l'ensemble des coordonnées dans l'espace, notamment cartésiennes, des points Pcn. On peut utiliser en particulier les techniques mathématiques de lissage de NURBS, de BE-ZIER ou encore une interpolation polynomiale.There are a certain number of classical mathematical techniques for achieving a surface Sc according to these criteria, from the set of coordinates in space, in particular Cartesian, of points Pcn. One can use in particular the mathematical techniques of smoothing of NURBS, BE-ZIER or even a polynomial interpolation.

De façon avantageuse, les étapes ci-dessus sont réalisées de façon au moins partiellement automatique à l'aide d'un équipement conventionnel de conception assistée par ordinateur. Ces étapes permettent d'obtenir sous une forme techniquement exploitable soit un ensemble de coordonnées de points, répartis au moins aussi finement que les points Pcn, soit une ou plusieurs équations satisfaisant aux critères définis plus haut.Advantageously, the above steps are carried out at least partially automatically using conventional computer-aided design equipment. These steps make it possible to obtain in a technically exploitable form either a set of point coordinates, distributed at least as finely as the points Pcn, or one or more equations satisfying the criteria defined above.

Ces données et/ou équations sont ensuite utilisées par exemple pour réaliser par usinage numérique un moule destiné à la fabrication de réflecteurs ayant une surface réfléchissante se conformant à la surface Sc telle qu'on l'a définie. Les outils mis en jeu sont là encore de type classique en soi.These data and / or equations are then used for example to produce by digital machining a mold intended for the manufacture of reflectors having a reflecting surface conforming to the surface Sc as defined. The tools involved are again classic in themselves.

  • La figure 2 illustre une surface réfléchissante obtenue par le procédé selon l'invention, par ses traces TH et Tv dans des plans horizontaux et verticaux, respectivement. On observe sur cette figure les ondulations à caractère aléatoire présentes sur la surface.FIG. 2 illustrates a reflecting surface obtained by the method according to the invention, by its traces T H and T v in horizontal and vertical planes, respectively. We observe in this figure the undulations of a random nature present on the surface.
  • Les figures 3 et 4 permettent de comprendre le résultat atteint par un miroir défini selon la présente invention.Figures 3 and 4 help to understand the result achieved by a mirror defined according to the present invention.
  • La figure 3 illustre, sur un écran de projection standard placé devant le dispositif d'éclairage ou de signalisation, des images de filament, ici quatre images 11-14, telles que produites par un ensemble de points (ici au nombre de quatre), espacés par exemple de quelques millimètres, situés dans la région du fond d'une surface réfléchissante de type classique réalisée par exemple selon les enseignements du document FR-A-2 609 146. A cet endroit du miroir, sa forme est telle qu'on observe une concentration importante des images, qui est indésirable lorsque l'on souhaite obtenir un faisceau homogène.FIG. 3 illustrates, on a standard projection screen placed in front of the lighting or signaling device, filament images, here four images 11-14, as produced by a set of points (here four in number), spaced for example a few millimeters, located in the region of the bottom of a reflective surface of conventional type produced for example according to the teachings of document FR-A-2 609 146. At this point of the mirror, its shape is such that observes a high concentration of images, which is undesirable when it is desired to obtain a homogeneous beam.
  • La figure 4 illustre un exemple d'images de filament 11'-14' obtenues avec un miroir traité conformément à la présente invention, produites par des points homologues des points utilisés sur la figure 3.FIG. 4 illustrates an example of filament images 11'-14 'obtained with a mirror treated in accordance with the present invention, produced by points homologous to the points used in FIG. 3.

On observe que les images sont éclatées ou dispersées dans des directions diverses et à des degrés divers. Ce phénomène se répétant dans toutes les régions du miroir, on obtient finalement un faisceau homogène.It is observed that the images are exploded or dispersed in various directions and to various degrees. This phenomenon repeating itself in all the regions of the mirror, a homogeneous beam is finally obtained.

La figure 5 illustre, par un ensemble de courbes isocandéla C, la configuration d'un faisceau de signalisation obtenu avec un miroir réalisé conformément aux enseignements de la demande de brevet FR-A-2 609 146 précitée. On observe dans la région centrale du faisceau une tache de concentration TC relativement marquée, très étroite et s'étendant sur pratiquement toute la hauteur du faisceau, ce qui n'est pas souhaitable.FIG. 5 illustrates, by a set of isocandela curves C, the configuration of a signaling beam obtained with a mirror produced in accordance with the teachings of the aforementioned patent application FR-A-2 609 146. In the central region of the beam, there is a spot of relatively marked TC concentration, very narrow and extending over practically the entire height of the beam, which is not not desirable.

La figure 6 illustre sous la même forme la configuration du faisceau obtenu lorsque le miroir, de même conception de base, a été traité selon la présente invention. Les courbes isocandéla sont indiquées en C' et la tache de concentration en TC'.FIG. 6 illustrates in the same form the configuration of the beam obtained when the mirror, of the same basic design, has been treated according to the present invention. The isocandela curves are indicated in C 'and the concentration spot in TC'.

On observe que la tache de concentration s'est diluée latéralement tout en diminuant en hauteur, tandis que l'intensité du faisceau est beaucoup plus homogène, ce qu'illustre en particulier un plus grand espacement mutuel des courbes isocandéla.It is observed that the spot of concentration is diluted laterally while decreasing in height, while the intensity of the beam is much more homogeneous, which illustrates in particular a greater mutual spacing of the isocandela curves.

Bien entendu, la présente invention s'applique non seulement aux feux de signalisation à miroir (notamment feux de recul, feux stop, feux anti-brouillard arrière, ainsi que les feux de position et les feux clignotants), mais également aux projecteurs.Of course, the present invention applies not only to mirror signaling lights (in particular reversing lights, stop lights, rear fog lights, as well as position lights and flashing lights), but also to searchlights.

En outre, les concepts de la présente invention peuvent être mis en oeuvre soit sur la totalité de la surface réfléchissante d'un miroir, soit sur une partie seulement de cette surface, et notamment dans la partie qui est à l'origine d'un excès de concentration d'une partie du faisceau.In addition, the concepts of the present invention can be implemented either on the whole of the reflecting surface of a mirror, or on only a part of this surface, and in particular in the part which is at the origin of a excess concentration of part of the beam.

La présente invention n'est nullement limitée à la forme de réalisation décrite ci-dessus et représentée sur les dessins, mais l'homme de l'art saura y apporter toute variante ou modification conforme à son esprit.The present invention is in no way limited to the embodiment described above and shown in the drawings, but a person skilled in the art will know how to make any variant or modification in accordance with his spirit.

Claims (9)

1. Procédé de fabrication d'un miroir récupérateur de flux pour dispositif d'éclairage ou de signalisation pour véhicule automobile, caractérisé en ce qu'il comprend les étapes suivantes: - définir une surface réfléchissante de base (Sb), - effectuer dans au moins une zone de cette surface une répartition de points de base (Pbn) espacés les uns des autres, - affecter à chaque point de base (Pbn) un décalage correctif déterminé aléatoirement, pour créer à chaque fois un point corrigé (Pcn) situé sur la normale (Nn) à la surface de base audit point de base et à une distance aléatoire (Dn) dudit point de base, - définir dans ladite zone une surface lisse corrigée Sc) passant par les points corrigés (Pcn), et - réaliser un miroir dont ladite zone de la surface réfléchissante est constituée par ladite surface lisse corrigée. 1. Method for manufacturing a flux recovery mirror for a lighting or signaling device for a motor vehicle, characterized in that it comprises the following steps: - define a basic reflecting surface (Sb), - carry out in at least one zone of this surface a distribution of base points (Pbn) spaced from each other, - assign to each base point (Pbn) a corrective offset determined randomly, to create each time a corrected point (Pcn) located on the normal (Nn) at the base surface at said base point and at a random distance (Dn ) from said base point, - define in said zone a smooth corrected surface Sc) passing through the corrected points (Pcn), and - Make a mirror whose said area of the reflecting surface is constituted by said corrected smooth surface. 2. Procédé selon la revendication 1, caractérisé en ce que les points de base (Pbn) sont équidistants deux à deux dans au moins une direction.2. Method according to claim 1, characterized in that the base points (Pbn) are equidistant two by two in at least one direction. 3. Procédé selon la revendication 2, caractérisé en ce que les points de base (Pbn) sont équidistants deux à deux dans deux directions perpendiculaires l'une à l'autre.3. Method according to claim 2, characterized in that the base points (Pbn) are equidistant two by two in two directions perpendicular to each other. 4. Procédé selon la revendication 2 ou 3, caractérisé en ce que les points de base (Pbn) sont équidistants deux à deux d'une distance (P) comprise entre 0,5 et 15 mm, de préférence entre 2 et 10 mm.4. Method according to claim 2 or 3, characterized in that the base points (Pbn) are equidistant two by two with a distance (P) between 0.5 and 15 mm, preferably between 2 and 10 mm. 5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que les valeurs des décalages (Dn) d'un point à l'autre sont aléatoires.5. Method according to one of claims 1 to 4, characterized in that the values of the offsets (Dn) from one point to another are random. 6. Procédé selon la revendication 5, caractérisé en ce que les valeurs des décalages (Dn) sont réparties aléatoirement de façon gaussienne.6. Method according to claim 5, characterized in that the values of the shifts (Dn) are distributed randomly in a Gaussian manner. 7. Procédé selon la revendication 6, rattachée à la revendication 4, caractérisé en ce que l'écart-type des décalage (Dn) répartis de façon gaussienne est compris entre 25 et 750 wm, de préférence entre 100 et 500 wm.7. Method according to claim 6, attached to claim 4, characterized in that the standard deviation of the shifts (Dn) distributed in a Gaussian manner is between 25 and 750 wm, preferably between 100 and 500 wm. 8. Dispositif d'éclairage ou de signalisation pourvé- hicule automobile, du type comprenant une source lumineuse, un miroir comportant une surface réfléchissante et un globe, voyant ou glace, la surface réfléchissante étant conçue pour engendrer un faisceau homogène, caractérisé en ce que, pour un ensemble corrélé quelconque de points situés dans au moins une zone de ladite surface réfléchissante, des images de la source (11'-14') formées par ces points sont distribuées sur un écran de projection de façon non corrélée les unes par rapport aux autres.8. A lighting or signaling device for a motor vehicle, of the type comprising a light source, a mirror comprising a reflecting surface and a globe, indicator or glass, the reflecting surface being designed to generate a homogeneous beam, characterized in that , for any correlated set of points located in at least one zone of said reflecting surface, images of the source (11'-14 ') formed by these points are distributed on a projection screen in a non-correlated manner with respect to each other to others. 9. Dispositif selon la revendication 8, caractérisé en ce que les images (11'-14') de la source sont distribuées de façon non corrélée selon deux dimensions.9. Device according to claim 8, characterized in that the images (11'-14 ') of the source are distributed uncorrelated in two dimensions.
EP93401930A 1992-07-27 1993-07-26 Method of manufacturing a mirror for vehicle headlights or vehicle signalling devices and headlamp with such a mirror Expired - Lifetime EP0581661B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9209237 1992-07-27
FR9209237A FR2694068B1 (en) 1992-07-27 1992-07-27 Method of manufacturing a mirror for a vehicle lighting or signaling device and projector equipped with a new mirror.

Publications (2)

Publication Number Publication Date
EP0581661A1 true EP0581661A1 (en) 1994-02-02
EP0581661B1 EP0581661B1 (en) 1996-09-25

Family

ID=9432290

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93401930A Expired - Lifetime EP0581661B1 (en) 1992-07-27 1993-07-26 Method of manufacturing a mirror for vehicle headlights or vehicle signalling devices and headlamp with such a mirror

Country Status (7)

Country Link
US (1) US5452191A (en)
EP (1) EP0581661B1 (en)
JP (1) JPH06187809A (en)
BR (1) BR9302995A (en)
DE (1) DE69305026T2 (en)
ES (1) ES2095016T3 (en)
FR (1) FR2694068B1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2752910A1 (en) * 1996-08-28 1998-03-06 Bosch Gmbh Robert LIGHTING SYSTEM FOR A MOTOR VEHICLE
EP0879989A3 (en) * 1997-05-19 1999-12-01 Autopal S.R.O. Lamp for motor vehicles
WO2009064275A1 (en) * 2007-11-15 2009-05-22 Philips Solid-State Lighting Solutions, Inc. Led collimator having spline surfaces and related methods
EP3636993A1 (en) * 2018-10-08 2020-04-15 Automotive Lighting Reutlingen GmbH Illumination device for a motor vehicle and motor vehicle with same

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5539629A (en) * 1995-05-04 1996-07-23 Ford Motor Company Multi-faceted light reflector for headlamp with facets having differentially tilted parabolic cylinders
JP4031600B2 (en) 1999-10-01 2008-01-09 株式会社小糸製作所 Method for determining reflecting surface of reflector for vehicle lamp
JP4050432B2 (en) * 1999-10-01 2008-02-20 株式会社小糸製作所 Method for determining reflecting surface of reflector for vehicle lamp
JP2002216511A (en) * 2001-01-22 2002-08-02 Ichikoh Ind Ltd Vehicle headlamp
EP1225386B1 (en) * 2001-01-22 2010-07-14 Ichikoh Industries, Ltd. Lamp device for vehicle
JP2002216513A (en) * 2001-01-22 2002-08-02 Ichikoh Ind Ltd Vehicle headlamp
AT15697U1 (en) * 2016-03-29 2018-04-15 Zkw Group Gmbh Vehicle headlight with a reflector
DE102018131556A1 (en) * 2018-12-10 2020-06-10 HELLA GmbH & Co. KGaA Method for producing an optical component, optical component and lighting device for a motor vehicle

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4481563A (en) * 1982-05-10 1984-11-06 Corning Glass Works Automotive headlight having optics in the reflector
EP0313216A2 (en) * 1987-10-21 1989-04-26 Optical Profile, Inc. Optical transform system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4495552A (en) * 1982-12-13 1985-01-22 Cal Custom Accessories, Inc. Forward shining vehicle lamp

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4481563A (en) * 1982-05-10 1984-11-06 Corning Glass Works Automotive headlight having optics in the reflector
EP0313216A2 (en) * 1987-10-21 1989-04-26 Optical Profile, Inc. Optical transform system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2752910A1 (en) * 1996-08-28 1998-03-06 Bosch Gmbh Robert LIGHTING SYSTEM FOR A MOTOR VEHICLE
US6773150B2 (en) 1996-08-28 2004-08-10 Robert Bosch Gmbh Lighting device for a vehicle
DE19634755B4 (en) * 1996-08-28 2008-01-31 Automotive Lighting Reutlingen Gmbh Lighting device of a vehicle
EP0879989A3 (en) * 1997-05-19 1999-12-01 Autopal S.R.O. Lamp for motor vehicles
WO2009064275A1 (en) * 2007-11-15 2009-05-22 Philips Solid-State Lighting Solutions, Inc. Led collimator having spline surfaces and related methods
EP3636993A1 (en) * 2018-10-08 2020-04-15 Automotive Lighting Reutlingen GmbH Illumination device for a motor vehicle and motor vehicle with same

Also Published As

Publication number Publication date
US5452191A (en) 1995-09-19
EP0581661B1 (en) 1996-09-25
ES2095016T3 (en) 1997-02-01
FR2694068A1 (en) 1994-01-28
BR9302995A (en) 1994-03-15
JPH06187809A (en) 1994-07-08
DE69305026D1 (en) 1996-10-31
DE69305026T2 (en) 1997-03-06
FR2694068B1 (en) 1994-10-28

Similar Documents

Publication Publication Date Title
EP0581661B1 (en) Method of manufacturing a mirror for vehicle headlights or vehicle signalling devices and headlamp with such a mirror
FR2608733A1 (en) LOW DEPTH SIGNALING LIGHT FOR MOTOR VEHICLE
EP1637397B1 (en) Lighting assembly with daytime running light (DRL) for vehicles
EP2792938A2 (en) Optical module and lighting and/or signalling device for a motor vehicle
EP0645578B1 (en) Projector with smooth cover lens, particularly for vehicles, and manufacturing process for the reflector of same
FR2745365A1 (en) SIGNALING LIGHT WITH IMPROVED MEANS FOR LIGHT DISTRIBUTION
EP0784185A1 (en) Signal light comprising an intermediate screen for optical treatment and styling purposes and manufacturing method
EP0684420A1 (en) Headlamp comprising a double filament lamp for low and high beam distribution
FR2760070A1 (en) PROJECTOR COMPRISING A TWO-FILAMENT LAMP FOR GENERATING A CUT BEAM AND AN UNCUT BEAM
FR2828153A1 (en) VEHICLE LAMP WITH INDICATOR MARK
EP3141804B1 (en) Lighting module of a motor vehicle headlight and associated headlight
EP0732534A1 (en) Signal light, especially for motor vehicle, emitting a beam of a given colour while being of another colour when not in use, and manufacturing method for its light cover
FR2841512A1 (en) PROJECTOR DEVICE FOR A MOTOR VEHICLE ILLUMINATING GANTRY POINTS
EP0258116A1 (en) Dipped and main beam headlamp with two transverse filaments for a motor vehicle
EP1464890B1 (en) Vehicle headlamp capable of illuminating elevated signage
EP1400748A1 (en) Vehicle headlamp having a mirror and an associated deflection element capable of producing a beam with a non-horizontal cut-off
EP0635674A1 (en) Vehicle lamp for signalling comprising a cover lens and an intermediate shield
FR2711215A1 (en) Signal light with multiple sources and intermediate optical processing plate for a motor vehicle.
JP2003086007A (en) Lamp for vehicle
FR3035704A1 (en) METHOD FOR MANUFACTURING A REFLECTOR FOR A LIGHTING AND / OR SIGNALING DEVICE
FR3022979A1 (en) LIGHTING AND / OR SIGNALING SYSTEM FOR MOTOR VEHICLES
JP2003323805A (en) Signal lights for vehicles
JP2005088864A (en) Hybrid type room mirror with plane mirror and curved mirror
EP1111294A1 (en) Vehicle headlamp with selective specialization
FR2836538A1 (en) ARRANGEMENT OF PATTERNS ON A SURFACE OF A MOTOR VEHICLE LIGHTING DEVICE

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE DE ES GB IT

17P Request for examination filed

Effective date: 19940613

17Q First examination report despatched

Effective date: 19950217

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE ES GB IT

REF Corresponds to:

Ref document number: 69305026

Country of ref document: DE

Date of ref document: 19961031

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19961107

ITF It: translation for a ep patent filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2095016

Country of ref document: ES

Kind code of ref document: T3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19970726

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19970727

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19970731

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
BERE Be: lapsed

Owner name: VALEO VISION

Effective date: 19970731

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19970726

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19990715

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010501

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 19980811

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050726