EP0966633A1 - Elliptical headlight for motor vehicle - Google Patents

Elliptical headlight for motor vehicle

Info

Publication number
EP0966633A1
EP0966633A1 EP99900505A EP99900505A EP0966633A1 EP 0966633 A1 EP0966633 A1 EP 0966633A1 EP 99900505 A EP99900505 A EP 99900505A EP 99900505 A EP99900505 A EP 99900505A EP 0966633 A1 EP0966633 A1 EP 0966633A1
Authority
EP
European Patent Office
Prior art keywords
mirror
zones
projector according
lens
lfs
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
EP99900505A
Other languages
German (de)
French (fr)
Other versions
EP0966633B1 (en
Inventor
Denis Saladin
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 EP0966633A1 publication Critical patent/EP0966633A1/en
Application granted granted Critical
Publication of EP0966633B1 publication Critical patent/EP0966633B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • F21S41/334—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors

Definitions

  • the present invention relates generally to headlamps of the elliptical type for motor vehicles.
  • a projector of this kind generally comprises a mirror having a first focus area in the vicinity of which is placed a light source and a second focus area in the vicinity of which the radiation of the source is concentrated after reflection by the mirror.
  • a lens typically a convex plane spherical lens, is focused in the vicinity of the second focal area and projects this concentrated radiation onto the road.
  • a satisfactory passing beam that is to say giving the maximum visual comfort to the driver while respecting the regulations in force, must include a spot of relatively sharp concentration either in the axis of the road, either slightly offset laterally down the aisle
  • the mirror of the aforementioned type generally leads to a beam having a concentration zone of excessive width and as a corollary of insufficient light intensity.
  • Another limitation of this known headlight is that the beam may have an insufficient thickness, that is to say have a high concentration of light just under the cut, but insufficiently illuminate the road closer to the vehicle.
  • the beams generated by the headlamps of the aforementioned type generally have a relatively reduced thickness, and in any case difficult to control, whereas it is rather desirable to have, at least in the case of a passing beam, a beam which has a substantial thickness towards the sides, and which at the same time does not generate excess light in the center line of the vehicle and too close to it.
  • the present invention aims to overcome these limitations of the state of the art and to provide a projector of the aforementioned type, in which the beam obtained is improved.
  • Another object of the present invention is to give the designer great flexibility in obtaining different characteristics of the beam, such as width and intensity of the concentration spot, evolution of the intensity towards the lateral edges of the beam.
  • the invention provides a motor vehicle headlamp, of the type capable of generating a light beam of given configuration and comprising a light source, a mirror of the elliptical type in the vicinity of a first focus of which the light source is located, a lens placed in front of the mirror, characterized in that the mirror comprises at least two zones situated side by side and capable of forming in a focal region of the ' lens light spots preformed in width, and in that the spots overlap each other in a direction horizontal.
  • each zone of the mirror has a surface having a horizontal generator such that the rays which it reflects from the rays coming from the source extend in vertical planes which intersect an imaginary line at points whose curvilinear abscissas evolve on this line according to a predetermined law.
  • said imaginary lines of the different zones are continuous.
  • said imaginary lines of the different zones are curves.
  • Each curve is all the more distant from the focal region of the lens, in a direction parallel to the axis of the mirror, that said curve is laterally distant from said axis.
  • a vertical section of said mirror situated in a vertical plane containing the rays reflected by the horizontal generator is capable of concentrating said rays reflected on said associated point of the imaginary line, said imaginary line being a line of secondary focal points , and said points being secondary foci.
  • an upper region of a vertical section is able to concentrate the rays which it reflects on another point situated between said associated secondary focal point and the lens.
  • transition line is determined by the intersection of the surfaces of said zones, and said transition line is distinct from respective horizontal isodeviation lines of said zones.
  • the mirror has two zones separated by a transition line extending substantially in the middle of the mirror in the horizontal direction.
  • the mirror has three zones separated by two transition lines extending on either side of the axis of the mirror.
  • a central area of the mirror is substantially narrower, in the horizontal direction, than two lateral areas.
  • the projector further comprises a mask located in the focal region of said lens, so as to generate a cut beam.
  • FIG. 1 illustrates by a partial schematic view in horizontal section the principle of construction of a zone of the mirror of a projector according to the invention
  • FIG. 2 illustrates by a partial schematic view in vertical section a first method of construction of the vertical sections from the mirror
  • FIG. 3 illustrates by a partial schematic view in vertical section a second mode of construction of the vertical sections of the mirror
  • FIG. 4 is a partial schematic view in horizontal section of a projector according to a first concrete embodiment of the invention
  • FIG. 7 is a partial schematic view in horizontal section of a projector according to a second embodiment of the invention.
  • FIGS 8a to 8c illustrate by sets of isocandela curves the light distribution of the beam parts generated by three individual regions of the mirror of the projector of Figure 7, and Figure 9 illustrates by a set of isocandela curves the light distribution of the beam overall obtained.
  • FIG. 1 there have been shown diagrammatically elements of a headlamp according to the invention, which comprises a light source 10, a mirror 20, a screen or masking mask 30 and a lens 40.
  • the source 10 is typically the filament of an incandescent lamp or the arc of a discharge lamp.
  • the mask 30 has, for example, in a conventional manner per se, an upper edge defined by two segments of lines defining together in an inverted and flattened "V", so as to generate a passing beam conforming to European regulations on the subject.
  • the lens 40 is for example a planar / convex spherical lens, with a point focus, or even a toric lens.
  • the mirror is constructed according to principles similar to those described in the document FR 2 704 044, to which reference will be made for more details, with differences with respect to these principles as will be explained below.
  • the mirror consists of at least two zones constructed individually and connecting according to slightly angled transition lines generally extending from top to bottom.
  • LFS line also makes it possible to control the focusing of the section of the mirror located in the vertical plane containing the reflected ray GF2.
  • the line LFS can be any curve, preferably without discontinuity so as to avoid discontinuities in the generated surface.
  • the whole of this section is able to focus the rays reflected by it on the point F2, the distance of which, measured along the axis xx, from the plane of the mask 30 can vary significantly along the LFS curve.
  • each of these sections is therefore an elementary section of ellipsoid of revolution having foci FI and F2, and the parameters of this ellipsoid vary as the point F2 moves along the curve LFS. It is understood here that the profile of the aforementioned LFS curve makes it possible to control not only the width of the light spot which will be formed in the plane of the mask 30, but also the thickness of this light spot, this being all the more more important than the point F2 is distant in front of the mask 30.
  • FIG. 3 illustrates an alternative embodiment of certain vertical sections of the mirror 20, according to which a part 20 ′ of the section illustrated in this figure exhibits the same behavior as in the case of FIG. 2, that is to say concentrates the radiation reflected on the point F2, while an upper part 20 '' of this section will concentrate the reflected radiation at a point F2 'distant from F2 towards the front, i.e. towards The lens.
  • This also has the result of thickening at will the light spot in the plane of the mask 30, and therefore the thickness of the projected beam.
  • the mirror 20 is then defined by designing a first zone characterized by a certain LFS curve and a certain rule for the evolution of the position. points F2 on this line as a function of the angle a of the rays emitted by the source, and at least a second zone characterized by another rule for changing the position of points F2, and if necessary by another line LFS whose trajectory is different from that which corresponds to the first zone.
  • the rules for changing the positions of the points F2 between an area of the mirror and an adjacent area are such that there is an overlap, in the width direction, between the radiation produced in the plane of the mask 30 by an area and the radiation produced in this same plane by the adjacent area.
  • This is achieved by designing the evolution rules for F2 points on the respective LFS lines of such that, for respective determined fractions of the first and second zones which are adjacent to the transition between the two zones, the horizontal angular intervals covered by the radiation reflected by these fractions of zones overlap. It is easily understood that, in this way, there will exist at the border between these two areas a slight bend, that is to say a non-differentiability, between the adjoining reflecting surfaces.
  • F2 f ( ⁇ ) on these curves
  • FIG. 4 schematically illustrates a first concrete embodiment of a mirror of a projector according to the invention, with two zones 20a and 20b designed as described above and which are separated by a transition edge 21 which extends noticeably in the middle of the mirror.
  • FIGS. 5a and 5b illustrate the beam portions projected by the lens 40 from the light spots formed respectively by these two zones, and with the intervention of the mask 30. It is observed that the portion of the beam generated by the area 20a in combination with the mask 30 and the lens 40 (FIG. 5a) projects substantially to the right with respect to the central vertical axis of the projection screen and that, in the in the opposite direction, the part of the beam generated by the area 20b in combination with the mask 30 and the lens 40 (FIG. 5b) projects substantially to the left relative to the central vertical axis of the screen.
  • FIG. 7 illustrates a second embodiment of a projector mirror according to the invention. This time it comprises " three zones, with two lateral zones 20a, 20b separated by a substantially narrower central zone.
  • the parameters used when designing the individual surfaces are such that the two transition lines 21 and 22 between the adjacent zones do not correspond to horizontal isode-deflection lines, so that the three corresponding beam parts, as illustrated in FIGS. 8a, 8b and 8c respectively, have lateral edges with progressive fading of the light This results in a fusion of these beam parts to form a homogeneous overall beam, which has the same qualities as in the case of FIG. 6, with however a higher level of central concentration.
  • a projector mirror according to the invention can be subdivided into as many zones as necessary, so as to be able to model the beam as a function of the objectives in terms of photometry both in regulatory terms and in terms of comfort plan visual.
  • the invention applies to obtaining any type of beam, limited or not by a cut (the mask 30 being absent in the latter case).
  • the invention is fundamentally different from the case where two light spots formed by two different zones of the same reflector, for example ellipsoidal, overlap by virtue of the fact that the light source is not punctual, but covers all cases where the overlap between these light spots goes beyond the overlap, which is, moreover, uncontrolled, which would be obtained with conventional surfaces.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

The invention concerns a headlight capable of generating a light beam of predetermined configuration, comprising a light source (10), an elliptical mirror (20) in the proximity of a first focal point of which is located the light source, a lens (40) placed in front of the mirror. The invention is characterised in that the mirror comprises at least two zones located side by side and capable of forming in a focal region of the lens hot spots preformed in width, and the spots mutually overlap in a horizontal direction. The invention is applicable to beams, in particular low beams, in motor vehicles.

Description

Projecteur du genre elliptique pour véhicule automobile. Projector of the elliptical type for a motor vehicle.
La présente invention concerne d'une façon générale les projecteurs du genre elliptique pour véhicules automobiles. Un projecteur de ce genre comprend d'une façon générale un miroir possédant une zone de premier foyer au voisinage duquel est placée une source lumineuse et une zone de second foyer au voisinage de laquelle se concentre le rayonnement de la source après réflexion par le miroir. Une lentille, typiquement une lentille sphérique plan convexe, est focalisée au voisinage de la zone de second foyer et projette ce rayonnement concentré sur la route .The present invention relates generally to headlamps of the elliptical type for motor vehicles. A projector of this kind generally comprises a mirror having a first focus area in the vicinity of which is placed a light source and a second focus area in the vicinity of which the radiation of the source is concentrated after reflection by the mirror. A lens, typically a convex plane spherical lens, is focused in the vicinity of the second focal area and projects this concentrated radiation onto the road.
Il est également classique de prévoir dans la zone de second foyer un écran destiné à occulter une partie du rayonnement et dont un bord supérieur définit, dans le faisceau formé, une coupure nette, pour ainsi obtenir un faisceau à coupure, notamment un faisceau de croisement.It is also conventional to provide in the second focal area a screen intended to obscure part of the radiation and whose upper edge defines, in the beam formed, a clear cut, so as to obtain a cut beam, in particular a passing beam .
Alors que ces projecteurs connus possédaient classiquement un miroir en forme d'ellipsoïde de révolution, avec des premier et second foyers ponctuels, la Demanderesse a récemment proposé de modifier un tel miroir pour engendrer, dans le plan focal de la lentille, une tache de lumière concentrée pré-étalée en largeur, de manière à donner au faisceau projeté la largeur requise. De cette manière, on limite sensiblement le recours à des éléments optiques (stries, prismes, ...) d'étalement latéral de la lumière, de tels éléments étant toujours délicats à mettre en œuvre dans un projecteur du type à projection d'une image lumineuse que constitue un projecteur du genre elliptique.While these known projectors conventionally had a mirror in the shape of an ellipsoid of revolution, with first and second point focal points, the Applicant recently proposed to modify such a mirror to generate, in the focal plane of the lens, a spot of light concentrated pre-spread in width, so as to give the projected beam the required width. In this way, the use of optical elements (striations, prisms, etc.) of lateral spreading of light is substantially limited, such elements being always difficult to implement in a projector of the type with projection of a bright image of a projector of the elliptical genus.
Le document FR 2 704 044 décrit un tel miroir modifié. Toutefois, le miroir décrit dans ce document présente encore certaines limitations. En particulier, la nature même du miroir conduit à un faisceau dont 1 ' étude photométrique démontre qu'il est perfectible.Document FR 2 704 044 describes such a modified mirror. However, the mirror described in this document still has certain limitations. In particular, the very nature of the mirror leads to a beam which photometric study shows that it can be improved.
Il est utile de rappeler ici qu'un faisceau de croisement satisfaisant, c'est à dire donnant le maximum de confort visuel au conducteur tout en respectant les règlements en vigueur, doit comporter une tache de concentration relativement pointue soit dans l'axe de la route, soit légèrement décalée latéralement vers le bas-côtéIt is useful to recall here that a satisfactory passing beam, that is to say giving the maximum visual comfort to the driver while respecting the regulations in force, must include a spot of relatively sharp concentration either in the axis of the road, either slightly offset laterally down the aisle
(c'est à dire vers la droite pour un sens de circulation à droite) , et doit également présenter une lumière relativement homogène sur une certaine largeur de part et d'autre de la tache de concentration, avec une transition relativement régulière entre la tache de concentration et la lumière étalée. On souhaite notamment éviter la présence d'arrêts brusques dans le faisceau c'est à dire la diminution trop rapide de l'intensité en bordure latérale de faisceau.(i.e. to the right for a right-hand traffic direction), and must also have a relatively uniform light over a certain width on either side of the concentration spot, with a relatively regular transition between the spot of concentration and the light spread out. In particular, it is desired to avoid the presence of sudden stops in the beam, that is to say the excessively rapid reduction in intensity at the lateral edge of the beam.
Or le miroir du type précité conduit en général à un faisceau présentant une zone de concentration de largeur excessive et en corollaire d'intensité lumineuse insuffisante. Une autre limitation de ce projecteur connu réside en ce que le faisceau peut présenter une épaisseur insuffisante, c'est à dire posséder une forte concentration de lumière juste sous la coupure, mais insuffisamment éclairer la route à plus grande proximité du véhicule.However, the mirror of the aforementioned type generally leads to a beam having a concentration zone of excessive width and as a corollary of insufficient light intensity. Another limitation of this known headlight is that the beam may have an insufficient thickness, that is to say have a high concentration of light just under the cut, but insufficiently illuminate the road closer to the vehicle.
Par ailleurs, les faisceaux engendrés par les projecteurs du type précité présentent généralement une épaisseur relativement réduite, et en tout cas difficile à contrôler, alors qu'il est plutôt souhaitable d'avoir, tout au moins dans le cas d'un faisceau de croisement, un faisceau qui possède une épaisseur substantielle vers les côtés, et qui en même temps n'engendre pas d'excès de lumière dans l'axe du véhicule et trop près de celui-ci.Furthermore, the beams generated by the headlamps of the aforementioned type generally have a relatively reduced thickness, and in any case difficult to control, whereas it is rather desirable to have, at least in the case of a passing beam, a beam which has a substantial thickness towards the sides, and which at the same time does not generate excess light in the center line of the vehicle and too close to it.
La présente invention vise à pallier ces limitations de l'état de la technique et à proposer un projecteur du type précité, dans lequel le faisceau obtenu soit amélioré.The present invention aims to overcome these limitations of the state of the art and to provide a projector of the aforementioned type, in which the beam obtained is improved.
Un autre objet de la présente invention est de donner au concepteur une grande souplesse dans l'obtention de différentes caractéristiques du faisceau, telles que largeur et intensité de la tache de concentration, évolution de l'intensité vers les bords latéraux du faisceau.Another object of the present invention is to give the designer great flexibility in obtaining different characteristics of the beam, such as width and intensity of the concentration spot, evolution of the intensity towards the lateral edges of the beam.
Un autre objet enfin de la présente invention est de proposer un projecteur dans lequel l'épaisseur du faisceau engendré puisse être contrôlée plus facilement et avec plus de souplesse lors de la conception. Ainsi l'invention propose un projecteur de véhicule automobile, du type susceptible d'engendrer un faisceau lumineux de configuration donnée et comportant une source lumineuse, un miroir du genre elliptique au voisinage d'un premier foyer duquel est située la source lumineuse, une lentille placée en avant du miroir, caractérisé en ce que le miroir comporte au moins deux zones situées côte à côte et aptes à former dans une région focale de la ' lentille des taches lumineuses préformées en largeur, et en ce que les taches se recouvrent mutuellement dans une direction horizontale .Another object finally of the present invention is to provide a projector in which the thickness of the beam generated can be controlled more easily and with more flexibility during the design. Thus the invention provides a motor vehicle headlamp, of the type capable of generating a light beam of given configuration and comprising a light source, a mirror of the elliptical type in the vicinity of a first focus of which the light source is located, a lens placed in front of the mirror, characterized in that the mirror comprises at least two zones situated side by side and capable of forming in a focal region of the ' lens light spots preformed in width, and in that the spots overlap each other in a direction horizontal.
Des aspects préférés, mais non limitatifs, du projecteur selon l'invention sont les suivants :Preferred, but not limiting, aspects of the projector according to the invention are as follows:
- chaque zone du miroir présente une surface possédant une génératrice horizontale telle que les rayons qu'elle réfléchit à partir des rayons issus de la source s'étendent dans des plans verticaux qui coupent une ligne imaginaire en des points dont les abscisses curvilignes évoluent sur cette ligne selon une loi prédéterminée. - lesdites lignes imaginaires des différentes zones sont continues. lesdites lignes imaginaires des différentes zones sont des courbes .each zone of the mirror has a surface having a horizontal generator such that the rays which it reflects from the rays coming from the source extend in vertical planes which intersect an imaginary line at points whose curvilinear abscissas evolve on this line according to a predetermined law. - said imaginary lines of the different zones are continuous. said imaginary lines of the different zones are curves.
-• chaque courbe est d'autant plus éloignée de la région focale de la lentille, suivant une direction parallèle à l'axe du miroir, que ladite courbe est éloignée latéralement dudit axe .Each curve is all the more distant from the focal region of the lens, in a direction parallel to the axis of the mirror, that said curve is laterally distant from said axis.
- dans chaque zone du miroir, une section verticale dudit miroir située dans un plan vertical contenant le rayons réfléchi par la génératrice horizontale est apte à concentrer lesdits rayons réfléchis sur ledit point associé de la ligne imaginaire, ladite ligne imaginaire étant une ligne de foyers secondaires, et lesdits points étant des foyers secondaires.in each zone of the mirror, a vertical section of said mirror situated in a vertical plane containing the rays reflected by the horizontal generator is capable of concentrating said rays reflected on said associated point of the imaginary line, said imaginary line being a line of secondary focal points , and said points being secondary foci.
- dans au moins une partie de l'une des zones, une région supérieure d'une section verticale est apte à concentrer les rayons qu'elle réfléchit sur un autre point situé entre ledit foyer secondaire associé et la lentille.- In at least part of one of the zones, an upper region of a vertical section is able to concentrate the rays which it reflects on another point situated between said associated secondary focal point and the lens.
- de part et d'autre d'une ligne de transition entre deux zones adjacentes, les sections verticales desdites zones possèdent des lignes de foyers secondaires non superposées. ladite ligne de transition est déterminée par l'intersection des surfaces desdites zones, et ladite ligne de transition est distincte de lignes d' isodéviation horizontale respectives desdites zones.- on either side of a transition line between two adjacent areas, the vertical sections of said areas have non-overlapping secondary hearth lines. said transition line is determined by the intersection of the surfaces of said zones, and said transition line is distinct from respective horizontal isodeviation lines of said zones.
- le miroir possède deux zones séparées par une ligne de transition s ' étendant sensiblement au milieu du miroir en direction horizontale. le miroir possède trois zones séparées par deux lignes de transition s ' étendant de part et d'autre de l'axe du miroir.- The mirror has two zones separated by a transition line extending substantially in the middle of the mirror in the horizontal direction. the mirror has three zones separated by two transition lines extending on either side of the axis of the mirror.
- une zone centrale du miroir est sensiblement plus étroite, en direction horizontale, que deux zones latérales.- A central area of the mirror is substantially narrower, in the horizontal direction, than two lateral areas.
- le projecteur comprend en outre un masque situé dans la région focale de ladite lentille, de manière à engendrer un faisceau coupé.- The projector further comprises a mask located in the focal region of said lens, so as to generate a cut beam.
- lesdites lignes de foyers secondaires sont situées, en direction axiale, entre le masque et la lentille.- Said lines of secondary focal points are located, in an axial direction, between the mask and the lens.
D'autres aspects, buts et avantages de la présente invention apparaîtront mieux à la lecture de la description détaillée suivante de formes de réalisation préférées de celle-ci, donnée à titre d'exemple et faite en référence aux dessins annexés, sur lesquels : la figure 1 illustre par une vue schématique partielle en coupe horizontale le principe de construction d'une zone du miroir d'un projecteur selon l'invention, la figure 2 illustre par une vue schématique partielle en coupe verticale un premier mode de construction des sections verticales du miroir, la figure 3 illustre par une vue schématique partielle en coupe verticale un second mode de construction des sections verticales du miroir, la figure 4 est une vue schématique partielle en coupe horizontale d'un projecteur selon une première forme de réalisation concrète de l'invention,Other aspects, aims and advantages of the present invention will appear better on reading the following detailed description of preferred embodiments thereof, given by way of example and made with reference to the accompanying drawings, in which: FIG. 1 illustrates by a partial schematic view in horizontal section the principle of construction of a zone of the mirror of a projector according to the invention, FIG. 2 illustrates by a partial schematic view in vertical section a first method of construction of the vertical sections from the mirror, FIG. 3 illustrates by a partial schematic view in vertical section a second mode of construction of the vertical sections of the mirror, FIG. 4 is a partial schematic view in horizontal section of a projector according to a first concrete embodiment of the invention,
- les figures 5a et 5b illustrent par des ensembles de courbes isocandela la répartition lumineuse des parties de faisceau engendrées par deux régions individualisées du miroir du projecteur de la figure 4, la figure 6 illustre par un ensemble de courbes isocandela la répartition lumineuse du faisceau globalement obtenu, la figure 7 est une vue schématique partielle en coupe horizontale d'un projecteur selon une seconde forme de réalisation de l'invention,- Figures 5a and 5b illustrate by sets of isocandela curves the light distribution of the beam portions generated by two individual regions of the projector mirror of Figure 4, Figure 6 illustrates by a set of isocandela curves the light distribution of the beam overall obtained, FIG. 7 is a partial schematic view in horizontal section of a projector according to a second embodiment of the invention,
- les figures 8a à 8c illustrent par des ensembles de courbes isocandela la répartition lumineuse des parties de faisceau engendrées par trois régions individualisées du miroir du projecteur de la figure 7, et la figure 9 illustre par un ensemble de courbes isocandela la répartition lumineuse du faisceau globalement obtenu.- Figures 8a to 8c illustrate by sets of isocandela curves the light distribution of the beam parts generated by three individual regions of the mirror of the projector of Figure 7, and Figure 9 illustrates by a set of isocandela curves the light distribution of the beam overall obtained.
En référence tout d'abord à la figure 1, on a représenté schématiquement des éléments d'un projecteur selon l'invention, qui comprend une source lumineuse 10, un miroir 20, un écran ou masque d'occultation 30 et une lentille 40.Referring firstly to FIG. 1, there have been shown diagrammatically elements of a headlamp according to the invention, which comprises a light source 10, a mirror 20, a screen or masking mask 30 and a lens 40.
La source 10 est typiquement le filament d'une lampe à incandescence ou l'arc d'une lampe à décharge. Le masque 30 possède par exemple, de façon classique en soi, un bord supérieur défini par deux segments de droites définissant ensemble en « V » renversé et aplati, de manière à engendrer un faisceau de croisement conforme aux règlements européens en la matière.The source 10 is typically the filament of an incandescent lamp or the arc of a discharge lamp. The mask 30 has, for example, in a conventional manner per se, an upper edge defined by two segments of lines defining together in an inverted and flattened "V", so as to generate a passing beam conforming to European regulations on the subject.
La lentille 40 est par exemple une lentille sphérique plan/convexe, avec un foyer ponctuel, ou encore une lentille torique .The lens 40 is for example a planar / convex spherical lens, with a point focus, or even a toric lens.
Le miroir est construit selon des principes analogues à ceux décrits dans le document FR 2 704 044, auquel on se référera pour plus de détails, avec par rapport à ces principes des différences telles qu'on va les expliciter plus loin.The mirror is constructed according to principles similar to those described in the document FR 2 704 044, to which reference will be made for more details, with differences with respect to these principles as will be explained below.
Tout d'abord, et comme on le verra plus en détail dans la suite, le miroir est constitué d'au moins deux zones construites individuellement et se raccordant selon des lignes de transition légèrement coudées s 'étendant généralement de haut en bas .First of all, and as will be seen in more detail below, the mirror consists of at least two zones constructed individually and connecting according to slightly angled transition lines generally extending from top to bottom.
Chacune de ces zones est construite comme on va le décrire ci-dessous.Each of these zones is constructed as will be described below.
On commence par définir une génératrice horizontale GH analogue à celle décrite dans FR 2 704 044, ce qui est illustré par le fait qu'un rayon FIG émis par la source en direction de la surface réfléchissante de la zone à construire, au niveau de sa génératrice horizontale, va être réfléchi en un rayon GF2 qui va couper une ligne de foyers secondaires LFS en un point F2 dont la position, ou abscisse curviligne, sur la ligne LFS varie en fonction de l'angle α du rayon FIG par rapport à l'axe optique x-x. On pourrait démontrer aisément que ceci revient à utiliser une génératrice horizontale dont l'équation est donnée en bas de la page 8 du document FR 2 704 044 susmentionné.We start by defining a horizontal generator GH similar to that described in FR 2 704 044, which is illustrated by the fact that a ray FIG emitted by the source in the direction of the reflecting surface of the area to be constructed, at its level. horizontal generator, will be reflected in a radius GF2 which will cut a line of secondary focal points LFS at a point F2 whose position, or curvilinear abscissa, on the line LFS varies according to the angle α of the radius FIG with respect to l optical axis xx. We could easily demonstrate that this amounts to using a horizontal generator whose equation is given at the bottom of page 8 of the document FR 2 704 044 mentioned above.
Une différence par rapport aux enseignements de ce document est que la ligne LFS permet de contrôler également la focalisation de la section du miroir situées dans le plan vertical contenant le rayon réfléchi GF2.A difference compared to the teachings of this document is that the LFS line also makes it possible to control the focusing of the section of the mirror located in the vertical plane containing the reflected ray GF2.
On observera ici que la ligne LFS peut être une courbe quelconque, de préférence sans discontinuité de manière à éviter des discontinuités dans la surface engendrée.It will be observed here that the line LFS can be any curve, preferably without discontinuity so as to avoid discontinuities in the generated surface.
Dans la forme de réalisation de base illustré sur la figure 2, l'ensemble de cette section est apte à focaliser les rayons réfléchis par elle sur le point F2 , dont la distance, mesurée selon l'axe x-x, par rapport au plan du masque 30 peut varier sensiblement le long de la courbe LFS.In the basic embodiment illustrated in FIG. 2, the whole of this section is able to focus the rays reflected by it on the point F2, the distance of which, measured along the axis xx, from the plane of the mask 30 can vary significantly along the LFS curve.
Chacune de ces sections est donc une section élémentaire d'ellipsoïde de révolution ayant pour foyers FI et F2 , et les paramètres de cet ellipsoïde varient à mesure que le point F2 se déplace le long de la courbe LFS. On comprend ici que le profil de la courbe LFS précitée permet de contrôler non seulement la largeur de la tache lumineuse qui va être formée dans le plan du masqué 30, mais également l'épaisseur de cette tache lumineuse, celle-ci étant d'autant plus importante que le point F2 est éloigné en avant du masque 30.Each of these sections is therefore an elementary section of ellipsoid of revolution having foci FI and F2, and the parameters of this ellipsoid vary as the point F2 moves along the curve LFS. It is understood here that the profile of the aforementioned LFS curve makes it possible to control not only the width of the light spot which will be formed in the plane of the mask 30, but also the thickness of this light spot, this being all the more more important than the point F2 is distant in front of the mask 30.
La figure 3 illustre une variante de réalisation de certaines sections verticales du miroir 20, selon laquelle une partie 20' de la section illustrée sur cette figure présente le naême comportement que dans le cas de la figure 2, c'est à dire concentre le rayonnement réfléchi sur le point F2 , tandis qu'une partie supérieure 20 ' ' de cette section va concentrer le rayonnement réfléchi en un point F2 ' éloigné de F2 vers l'avant, c'est à dire vers la lentille. Ceci a également pour résultat d'épaissir à volonté la tache lumineuse dans le plan du masque 30, et donc l'épaisseur du faisceau projeté.FIG. 3 illustrates an alternative embodiment of certain vertical sections of the mirror 20, according to which a part 20 ′ of the section illustrated in this figure exhibits the same behavior as in the case of FIG. 2, that is to say concentrates the radiation reflected on the point F2, while an upper part 20 '' of this section will concentrate the reflected radiation at a point F2 'distant from F2 towards the front, i.e. towards The lens. This also has the result of thickening at will the light spot in the plane of the mask 30, and therefore the thickness of the projected beam.
On observera ici que les surfaces réfléchissantes donnant les comportements optiques correspondant aux figures 2 et 3 peuvent être aisément déduites de l'équation de surface donnée à la page 9 de FR 2 704 044.It will be observed here that the reflective surfaces giving the optical behaviors corresponding to FIGS. 2 and 3 can be easily deduced from the surface equation given on page 9 of FR 2 704 044.
Etant rappelé ici que la conception de surface décrite ci-dessus s'applique à une zone parmi deux ou davantage, le miroir 20 est alors défini en concevant une première zone caractérisée par une certaine courbe LFS et une certaine règle d'évolution de la position des points F2 sur cette ligne en fonction de l'angle a des rayons émis par la source, et au moins une seconde zone caractérisée par une autre règle d'évolution de la position des points F2 , et le cas échéant par une autre ligne LFS dont la trajectoire est différente de celle qui correspond à la première zone.It being recalled here that the surface design described above applies to one of two or more zones, the mirror 20 is then defined by designing a first zone characterized by a certain LFS curve and a certain rule for the evolution of the position. points F2 on this line as a function of the angle a of the rays emitted by the source, and at least a second zone characterized by another rule for changing the position of points F2, and if necessary by another line LFS whose trajectory is different from that which corresponds to the first zone.
En outre, et selon une caractéristique importante de l'invention, les règles d'évolution des positions des points F2 entre une zone du miroir et une zone adjacente sont telles qu'il existe un recouvrement, dans le sens de la largeur, entre le rayonnement produit dans le plan du masque 30 par une zone et le rayonnement produit dans ce même plan par la zone adjacente. Ceci est réalisé en concevant les règles d'évolution des points F2 sur les lignes LFS respectives de telle manière que, pour des fractions déterminées respectives des première et seconde zones qui sont adjacentes à la transition entre les deux zones, les intervalles angulaires horizontaux couverts par les rayonnements réfléchis par ces fractions de zones se recouvrent. On comprend aisément que, de cette manière, il va exister au niveau de la frontière entre ces deux zones un léger coude, c'est-à-dire une non dérivabilité, entre les surfaces réfléchissantes attenantes.In addition, and according to an important characteristic of the invention, the rules for changing the positions of the points F2 between an area of the mirror and an adjacent area are such that there is an overlap, in the width direction, between the radiation produced in the plane of the mask 30 by an area and the radiation produced in this same plane by the adjacent area. This is achieved by designing the evolution rules for F2 points on the respective LFS lines of such that, for respective determined fractions of the first and second zones which are adjacent to the transition between the two zones, the horizontal angular intervals covered by the radiation reflected by these fractions of zones overlap. It is easily understood that, in this way, there will exist at the border between these two areas a slight bend, that is to say a non-differentiability, between the adjoining reflecting surfaces.
Par ailleurs, pour assurer entre deux zones adjacentes une transition qui s'étende préférentiellement sensiblement verticalement, les paramètres des surfaces réfléchissantes des deux zones, définis pour l'essentiel par la trajectoire des courbes LFS respectives et par les règles d'évolution F2 = f (α) sur ces courbes, sont choisis de manière à obtenir ce genre de transition. Ceci implique notamment que les positions axiales des courbes LFS respectives par rapport au plan du masque 30 doivent être raisonnablement proches l'une de l'autre pour ce qui concerne les fractions de zones dont les champs, en termes de déviation horizontale, se recouvrent .Furthermore, to ensure a transition between two adjacent zones which preferably extends substantially vertically, the parameters of the reflective surfaces of the two zones, defined essentially by the trajectory of the respective LFS curves and by the rules of evolution F2 = f (α) on these curves, are chosen so as to obtain this kind of transition. This implies in particular that the axial positions of the respective LFS curves with respect to the plane of the mask 30 must be reasonably close to one another as regards the fractions of zones whose fields, in terms of horizontal deviation, overlap.
La figure 4 illustre schématiquement une première forme de réalisation concrète d'un miroir d'un projecteur selon l'invention, avec deux zones 20a et 20b conçues comme décrit ci-dessus et qui sont séparées par une arête de transition 21 qui s'étend sensiblement au milieu du miroir.FIG. 4 schematically illustrates a first concrete embodiment of a mirror of a projector according to the invention, with two zones 20a and 20b designed as described above and which are separated by a transition edge 21 which extends noticeably in the middle of the mirror.
Les figures 5a et 5b illustrent les parties de faisceau projetées par la lentille 40 à partir des taches lumineuses formées respectivement par ces deux zones, et avec l'intervention du masque 30. On observe que la partie de faisceau engendrée par la zone 20a en combinaison avec le masque 30 et la lentille 40 (figure 5a) déborde sensiblement vers la droite par rapport à l'axe vertical central de l'écran de projection et que, dans le sens inverse, la partie de faisceau engendrée par la zone 20b en combinaison avec le masque 30 et la lentille 40 (figure 5b) déborde sensiblement vers la gauche par rapport à l'axe vertical central de l'écran.FIGS. 5a and 5b illustrate the beam portions projected by the lens 40 from the light spots formed respectively by these two zones, and with the intervention of the mask 30. It is observed that the portion of the beam generated by the area 20a in combination with the mask 30 and the lens 40 (FIG. 5a) projects substantially to the right with respect to the central vertical axis of the projection screen and that, in the in the opposite direction, the part of the beam generated by the area 20b in combination with the mask 30 and the lens 40 (FIG. 5b) projects substantially to the left relative to the central vertical axis of the screen.
On observe également que ces débordements des parties de faisceau respectives ne présentent pas d'arrêts brusques de lumière, mais au contraire que la quantité de lumière diminue progressivement, comme en témoigne l'espacement entre les courbes isocandela représentées. On notera ici que cette absence d'arrêts brusques est obtenue lorsque l'arête de transition entre les deux zones 20a et 20b ne suit pas une ligne d' isodéviation horizontale de la lumière, c'est à dire ne se superposera à une ligne de chaque zone qui donnerait la même déviation horizontale aux rayons réfléchis. Typiquement, ceci est obtenu en donnant aux courbes LFS des deux zones des positions axiales différentes au voisinage de leurs parties touchées par les rayons réfléchis par des régions des zones 20a, 20b adjacentes à la frontière 21, et en déterminant la ligne 21 comme étant la ligne d'intersection entre les deux surfaces ainsi définies. De la sorte, les deux parties de faisceau vont fusionner en un faisceau global (figure 6) qui présente une excellente homogénéité, ainsi qu'une concentration dans l'axe qui à la fois est marquée et à la fois fusionne de façon progressive avec les parties plus larges du faisceau. La figure 7 illustre une seconde forme de réalisation d'un miroir de projecteur selon l'invention. Il comporte cette fois-ci " trois zones, avec deux zones latérales 20a, 20b séparées par une zone centrale sensiblement plus étroite. Ici encore, les paramètres utilisés lors de la conception des surfaces individuelles sont tels que les deux lignes de transition 21 et 22 entre les zones adjacentes ne correspondent pas à des lignes d' isodéviation horizontale, de telle manière que les trois parties de faisceau correspondantes, telles qu'illustrées sur les figures 8a, 8b et 8c respectivement, présentent des bords latéraux à évanouissement progressif de la lumière. Il en résulte une fusion de ces parties de faisceau pour former un faisceau global homogène, qui présente les mêmes qualités que dans le cas de la figure 6, avec toutefois un niveau de concentration centrale plus important .It is also observed that these overflows of the respective beam portions do not present sudden stops of light, but on the contrary that the quantity of light gradually decreases, as evidenced by the spacing between the isocandela curves represented. It will be noted here that this absence of sudden stops is obtained when the transition edge between the two zones 20a and 20b does not follow a line of horizontal isodeviation of the light, that is to say will not be superimposed on a line of each zone which would give the same horizontal deviation to the reflected rays. Typically, this is obtained by giving the LFS curves of the two zones different axial positions in the vicinity of their parts affected by the rays reflected by regions of the zones 20a, 20b adjacent to the border 21, and by determining the line 21 as being the line of intersection between the two surfaces thus defined. In this way, the two beam parts will merge into a global beam (Figure 6) which has excellent homogeneity, as well as a concentration in the axis which is both marked and both gradually merges with the wider parts of the beam. FIG. 7 illustrates a second embodiment of a projector mirror according to the invention. This time it comprises " three zones, with two lateral zones 20a, 20b separated by a substantially narrower central zone. Here again, the parameters used when designing the individual surfaces are such that the two transition lines 21 and 22 between the adjacent zones do not correspond to horizontal isode-deflection lines, so that the three corresponding beam parts, as illustrated in FIGS. 8a, 8b and 8c respectively, have lateral edges with progressive fading of the light This results in a fusion of these beam parts to form a homogeneous overall beam, which has the same qualities as in the case of FIG. 6, with however a higher level of central concentration.
On comprend ici qu'en jouant sur la largeur de la zone 20c et sur l'étalement latéral (et le cas échéant sur 1 ' épaississement) qu'elle réalise, permet de moduler l'allure du faisceau avec une grande souplesse.It is understood here that by playing on the width of the zone 20c and on the lateral spreading (and if necessary on the thickening) which it achieves, makes it possible to modulate the appearance of the beam with great flexibility.
Bien entendu, la présente invention n'est nullement limitée aux formes de réalisation décrites et représentées, mais l'homme du métier saura y apporter toute variante ou modification conforme à son esprit. En particulier, il est bien entendu qu'un miroir de projecteur selon l'invention peut être subdivisé en autant de zones que nécessaires, de manière à pouvoir modeler le faisceau en fonction des objectifs en termes de photométrie tant sur le plan réglementaire que sur le plan du confort visuel .Of course, the present invention is not limited to the embodiments described and shown, but the skilled person will be able to make any variant or modification according to his spirit. In particular, it is understood that a projector mirror according to the invention can be subdivided into as many zones as necessary, so as to be able to model the beam as a function of the objectives in terms of photometry both in regulatory terms and in terms of comfort plan visual.
Il est bien entendu également que l'invention s'applique à l'obtention de tout type de faisceau, limité ou non par une coupure (le masque 30 étant absent dans ce dernier cas) .It is also understood that the invention applies to obtaining any type of beam, limited or not by a cut (the mask 30 being absent in the latter case).
Enfin il est important de noter ici que l'invention se distingue fondamentalement du cas où deux taches lumineuses formées par deux zones différentes d'un même réflecteur par exemple ellipsoïdal se recouvrent en vertu du fait que la source lumineuse n'est pas ponctuelle, mais vise tous les cas où le recouvrement entre ces taches lumineuses va au delà du recouvrement, au demeurant incontrôlé, qui serait obtenu avec les surfaces classiques. Finally, it is important to note here that the invention is fundamentally different from the case where two light spots formed by two different zones of the same reflector, for example ellipsoidal, overlap by virtue of the fact that the light source is not punctual, but covers all cases where the overlap between these light spots goes beyond the overlap, which is, moreover, uncontrolled, which would be obtained with conventional surfaces.

Claims

REVENDICATIONS
1. Projecteur de véhicule automobile, du type susceptible d'engendrer un faisceau lumineux de configuration s donnée et comportant une source lumineuse (10) , un miroir (20) du genre elliptique au voisinage d'un premier foyer duquel est située la source lumineuse, une lentille (40) placée en avant du miroir, caractérisé en ce que le miroir comporte au moins deux zones (20a, 20b ; 20a, 20b, 20c) o situées côte à côte et aptes à former dans une région focale de la lentille des taches lumineuses préformées en largeur, et en ce que les taches se recouvrent mutuellement dans une direction horizontale.1. Motor vehicle headlamp, of the type capable of generating a light beam of given configuration s and comprising a light source (10), a mirror (20) of the elliptical type in the vicinity of a first focus of which the light source is situated , a lens (40) placed in front of the mirror, characterized in that the mirror comprises at least two zones (20a, 20b; 20a, 20b, 20c) o located side by side and capable of forming in a focal region of the lens luminous spots preformed in width, and in that the spots overlap each other in a horizontal direction.
2. Projecteur selon la revendication 1, caractérisé en s ce que chaque zone (20a, 20b ; 20a, 20b, 20c) du miroir présente une surface possédant une génératrice horizontale (GH) telle que les rayons (GF2) qu'elle réfléchit à partir des rayons (FIG) issus de la source (10) s'étendent dans des plans verticaux qui coupent une ligne imaginaire (LFS) en des 0 points (F2) dont les abscisses curvilignes évoluent sur cette ligne selon une loi prédéterminée.2. Projector according to claim 1, characterized in that each zone (20a, 20b; 20a, 20b, 20c) of the mirror has a surface having a horizontal generator (GH) such that the rays (GF2) that it reflects at from the rays (FIG) from the source (10) extend in vertical planes which intersect an imaginary line (LFS) at 0 points (F2) whose curvilinear abscissas evolve on this line according to a predetermined law.
3. Projecteur selon la revendication 2, caractérisé en ce que lesdites lignes imaginaires (LFS) des différentes zones sont continues. 53. Projector according to claim 2, characterized in that said imaginary lines (LFS) of the different zones are continuous. 5
4. Projecteur selon la revendication 2, caractérisé en ce que lesdites lignes imaginaires (LFS) des différentes zones sont des courbes .4. Projector according to claim 2, characterized in that said imaginary lines (LFS) of the different zones are curves.
5. Projecteur selon la revendication 4, caractérisé en ce que chaque courbe (LFS) est d'autant plus éloignée de la région focale de la lentille, suivant une direction parallèle à l'axe (x-x) du miroir (20), que ladite courbe est éloignée latéralement dudit axe.5. Projector according to claim 4, characterized in that each curve (LFS) is all the more distant from the focal region of the lens, in a direction parallel to the axis (xx) of the mirror (20), that said curve is laterally distant from said axis.
6. Projecteur selon la revendication 2, caractérisé en ce que dans chaque zone du miroir, une section verticale dudit miroir située dans un plan vertical contenant le rayon (GF2) réfléchi par la génératrice horizontale (GH) est apte à concentrer lesdits rayons réfléchis sur ledit point associé6. Projector according to claim 2, characterized in that in each zone of the mirror, a vertical section of said mirror located in a vertical plane containing the ray (GF2) reflected by the horizontal generator (GH) is capable of concentrating said reflected rays on said associated point
(F2) de la ligne imaginaire, ladite ligne imaginaire étant une ligne de foyers secondaires (LFS) , et lesdits points (F2) étant des foyers secondaires .(F2) of the imaginary line, said imaginary line being a line of secondary foci (LFS), and said points (F2) being secondary foci.
7. Projecteur selon la revendication 6, caractérisé en ce que, dans au moins une partie de l'une des zones, une région supérieure (20'') d'une section verticale est apte à concentrer les rayons qu'elle réfléchit sur un autre point (F21) situé entre ledit foyer secondaire associé (F2) et la lentille (40) .7. Projector according to claim 6, characterized in that, in at least part of one of the zones, an upper region (20 '') of a vertical section is capable of concentrating the rays which it reflects on a another point (F2 1 ) located between said associated secondary focus (F2) and the lens (40).
8. Projecteur selon la revendication 6, caractérisé en ce que, de part et d'autre d'une ligne de transition (21 ; 21, 22) entre deux zones adjacentes, les sections verticales desdites zones possèdent des lignes de foyers secondaires (LFS) non superposées.8. Projector according to claim 6, characterized in that, on either side of a transition line (21; 21, 22) between two adjacent areas, the vertical sections of said areas have secondary focal lines (LFS ) not superimposed.
9. Projecteur selon la revendication 8, caractérisé en ce que ladite ligne de transition (21; 1, 22) est déterminée par l'intersection des surfaces desdites zones, et en ce que ladite ligne de transition est distincte de lignes d' isodéviation horizontale respectives desdites zones.9. Projector according to claim 8, characterized in that said transition line (21; 1, 22) is determined by the intersection of the surfaces of said zones, and in that said transition line is distinct from lines of horizontal isodeviation respective of said zones.
10. Projecteur selon la revendication 1, caractérisé en ce que le miroir possède deux zones (20a, 20b) séparées par une ligne de transition (21) s ' étendant sensiblement au milieu du miroir en direction horizontale.10. Projector according to claim 1, characterized in that the mirror has two zones (20a, 20b) separated by a transition line (21) extending substantially in the middle of the mirror in the horizontal direction.
11. Projecteur selon la revendication 1, caractérisé en ce que le miroir possède trois zones (20a, 20b, 20c) séparées s par deux lignes de transition (21, 22) s ' étendant de part et d'autre de l'axe (x-x) du miroir .11. Projector according to claim 1, characterized in that the mirror has three zones (20a, 20b, 20c) separated by two transition lines (21, 22) extending on either side of the axis ( xx) of the mirror.
12. Projecteur selon la revendication 11, caractérisé en ce qu'une zone centrale (20c) du miroir est sensiblement plus étroite, en direction horizontale, que deux zones o latérales (20a, 20b) .12. Projector according to claim 11, characterized in that a central zone (20c) of the mirror is substantially narrower, in the horizontal direction, than two lateral zones o (20a, 20b).
13. Projecteur selon la revendication 1, caractérisé en ce qu'il comprend en outre un masque (30) situé dans la région focale de ladite lentille (40) , de manière à engendrer un faisceau coupé. 13. Projector according to claim 1, characterized in that it further comprises a mask (30) located in the focal region of said lens (40), so as to generate a cut beam.
EP99900505.1A 1998-01-09 1999-01-08 Elliptical headlight for motor vehicle Expired - Lifetime EP0966633B1 (en)

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FR9800339A FR2773604B1 (en) 1998-01-09 1998-01-09 ELLIPTICAL PROJECTOR FOR A MOTOR VEHICLE
FR9800339 1998-01-09
PCT/FR1999/000020 WO1999035438A1 (en) 1998-01-09 1999-01-08 Elliptical headlight for motor vehicle

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FR2802282B1 (en) 1999-12-09 2002-01-25 Valeo Vision METHOD FOR DEVELOPING A MASK FOR ADAPTING A CROSSING PROJECTOR BEAM TO A DIRECTION OF REVERSE TRAFFIC
FR2809798B1 (en) 2000-05-31 2002-11-29 Valeo Vision METHOD FOR ADAPTING AN ELLIPTICAL PROJECTOR CROSSING BEAM TO A DIRECTION OF REVERSE CIRCULATION, DEVICE, TEMPLATE AND PROJECTOR FOR CARRYING OUT SAID METHOD
FR2810934B1 (en) 2000-07-03 2002-09-13 Valeo Vision ELLIPTICAL PROJECTOR WITH BEAM MODIFICATION BY MOVEMENT OF OPTICAL ELEMENTS
FR2822550B1 (en) * 2001-03-21 2003-05-16 Valeo Vision MOTOR VEHICLE PROJECTOR WITH MIRROR AND DEVICE FOR DIVERSION
FR2843184B1 (en) 2002-08-05 2004-11-26 Valeo Vision ELLIPTICAL LIGHTING PROJECTOR SUITABLE FOR MAKING A TURNING BEAM
FR2883359B1 (en) * 2005-03-15 2007-05-11 Valeo Vision Sa LUMINOUS PROJECTOR FOR A MOTOR VEHICLE WITH LOW DIMENSIONS
JP4506720B2 (en) * 2006-05-17 2010-07-21 市光工業株式会社 Vehicle headlamp
WO2009092451A1 (en) * 2008-01-25 2009-07-30 Osram Gesellschaft mit beschränkter Haftung Ac voltage reflector lamp
FR3065088B1 (en) 2017-04-11 2022-12-02 Valeo Vision OPTICAL ASSEMBLY COMPRISING REFLECTORS PROVIDED WITH DISCONTINUITIES

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EP0966633B1 (en) 2016-05-18
JP2001515649A (en) 2001-09-18
US6431736B1 (en) 2002-08-13

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