EP1433999A1 - Motor vehicle headlamp with a transverse light source - Google Patents

Motor vehicle headlamp with a transverse light source Download PDF

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Publication number
EP1433999A1
EP1433999A1 EP03293144A EP03293144A EP1433999A1 EP 1433999 A1 EP1433999 A1 EP 1433999A1 EP 03293144 A EP03293144 A EP 03293144A EP 03293144 A EP03293144 A EP 03293144A EP 1433999 A1 EP1433999 A1 EP 1433999A1
Authority
EP
European Patent Office
Prior art keywords
reflector
optical axis
ellipsoidal reflector
ellipsoidal
verticalized
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
EP03293144A
Other languages
German (de)
French (fr)
Other versions
EP1433999B1 (en
Inventor
Norbert Brun
Jean-Luc Meyrenaud
Kamislav Fadel
Xavier Helme-Guizon
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
Renault SAS
Original Assignee
Valeo Vision SAS
Renault SAS
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Publication date
Application filed by Valeo Vision SAS, Renault SAS filed Critical Valeo Vision SAS
Publication of EP1433999A1 publication Critical patent/EP1433999A1/en
Application granted granted Critical
Publication of EP1433999B1 publication Critical patent/EP1433999B1/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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/17—Discharge light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/17—Discharge light sources
    • F21S41/173—Fluorescent light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/255—Lenses with a front view of circular or truncated circular outline
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
    • 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
    • F21S41/323—Optical layout thereof the reflector having two perpendicular cross sections having regular geometrical curves of a distinct nature
    • 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
    • F21S41/36—Combinations of two or more separate reflectors
    • F21S41/365—Combinations of two or more separate reflectors successively reflecting the light
    • 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
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
    • 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
    • F21S41/335—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors with continuity at the junction between adjacent areas

Definitions

  • the invention relates to a vehicle searchlight automobile of the kind that includes a reflector and a source light extending transversely to the optical axis of the reflector and placed in the vicinity of the focus of the reflector.
  • EP 0 933 585 a source projector transverse with a verticalized reflector.
  • reflector verticalized is a reflector extending mainly according to vertical direction and whose surface is determined to reflect next a substantially horizontal direction of the light rays coming a source located near the focus of the reflector.
  • the projector according to EP 0 933 585 makes it possible to obtain a beam of satisfactory range along the optical axis of the projector, with a clear cut of the beam below a horizontal plane.
  • the invention aims, above all, to provide a projector bright, while retaining the benefits of a projector verticalized reflector, provides a simple and effective way a large beam width to illuminate the aisles.
  • the surfaces of the verticalized reflector preferably have a focus located in the vicinity of the light source.
  • the verticalized reflector may include ridges delimiting at least one central facet and two Side facets inclined towards each other.
  • the beam produced by the verticalized reflector has an opening angle at most equal to ⁇ 20 ° on either side of the axis optical.
  • the beam produced by the ellipsoidal reflector has an angle opening of about ⁇ 40 ° on both sides of the optical axis.
  • the plane passing through the transverse axis of the source luminous and parallel to the optical axis of the ellipsoidal reflector is horizontal.
  • the ellipsoidal reflector is located above this horizontal plane while the verticalized reflector is located below of this plan.
  • the projector of the invention can be a projector of crossing for a motor vehicle, in which case the ellipsoidal reflector has a cover located in the vicinity of the external focus so that the outgoing beam is essentially located below a level determined, while the verticalized reflector is intended to create a V-cut corresponding to that of a passing beam (code).
  • the cover can be located in the fireplace or behind the fireplace ellipsoidal reflector.
  • the top edge of the cache is located below the horizontal plane passing through the optical axis of the reflector, especially about 1.5 mm below.
  • the cache can be constituted by a portion of cylinder with vertical generatrices, turning its concavity forward, according to the curvature of the field of the ellipsoidal reflector.
  • the optical axis of the lens is advantageously shifted by relative to the optical axis of the ellipsoidal reflector, on the side of the notch.
  • the lens can be arranged in such a way that its focus backward, including about 1.5 mm back, from the fireplace outer of the ellipsoidal reflector.
  • the ellipsoidal reflector can be located below of the horizontal plane passing through the transverse axis of the light source and parallel to the optical axis of the reflector, while the verticalized projector is located above this plane. This provision is advantageous in the where the light source is a discharge lamp.
  • a projector illuminated P for a motor vehicle having a source S transversal that is to say whose geometric axis is horizontal and orthogonal to the Y-Y optical axis of the projector.
  • the source S may consist of a halogen lamp having a generally cylindrical filament.
  • this lamp is mounted transversely in the projector while in the case of a lamp standardized H3 with cross filament, this H3 lamp is mounted axially in the projector.
  • the source S may consist of a lamp discharge producing a generally cylindrical arc whose axis geometric mean is perpendicular to the plane of FIG. 1.
  • the source S is placed in the vicinity of the internal focus Fi of a ellipsoidal reflector R1.
  • ellipsoidal reflector is meant a reflector whose surface is defined from two foci respectively an internal focal point Fi and an external focus Fe, this surface is closer to an ellipsoid without necessarily being exactly a ellipsoid.
  • the wall of the ellipsoidal reflector R1 has an indentation 1 on one side of the plane passing through the geometric axis of source S and parallel to the Y-Y optical axis.
  • the plane in question is the horizontal plane passing through the geometric axis of the source S.
  • the notch 1 corresponds substantially to a cut of half lower reflector R1 by an oblique plane.
  • the cutting plane is slightly inclined from left to right of Fig.1.
  • Plan view, according to 3 the indentation 1 is limited by two edges converging towards the rear from the source S.
  • the rear ends of the edges of the indentation 1 are connected by a segment orthogonal to the Y-Y axis.
  • the notch 1 is planned to let down, on the opposite side to most of the reflector R1, a maximum of light from the source S.
  • optical axis of the ellipsoidal reflector R1 is confused with the Y-Y optical axis of the projector.
  • the diameter of the lens 2 may be about 50 mm.
  • the lens 2 is preferably of small size (by “pull” is meant the distance between the lens and the external focus Fe of R1).
  • the accessory parts of the headlamp in particular ice-cream closure and auxiliary equipment to maintain reflector, lens, light source and other parts, are not shown because known in themselves.
  • the focus 3 of the lens 2 is close to, or coincident with, the external focus Fe of the reflector R1.
  • the focus 3 of the lens lies behind the external focus Fe of lens 2 by a distance d, in particular about 1.5 mm.
  • the optical axis 4 of the lens 2 is located more down as the optical axis Y-Y.
  • the vertical distance h between the optical axis 4 of the lens 2 and the optical axis Y-Y is about 1.5 mm which allows to recover more luminous flux coming from the reflector R1.
  • the filament of the S lamp can be located vertically above of the internal fireplace Fi to increase the luminous flux from the ellipsoidal reflector R1.
  • the projector P is intended to provide the function code that is to say to provide a beam crossing.
  • a cover 5 is disposed in the vicinity of the focus outer cover Fe.
  • the cover 5 is constituted by an opaque plate, by metal example, maintained by any appropriate means. Due to the curvature of the field, the cover 5 forms a portion of surface cylindrical vertical generatrices turning its concavity forward.
  • the upper edge of the cover 5 is located below the horizontal plane passing through Y-Y at a distance of about 1.5 mm.
  • a verticalized reflector R2 is arranged on the side of the notch 1 opposite most of the ellipsoidal reflector R1. The intersection of this verticalized reflector R2 by a vertical plane passing through the Y-Y axis is formed by a curve arc next to a parabola bow having a focus neighbor of the internal focus Fi.
  • the surface of the reflector R2 is determined so that a light ray such as 6i from source S is reflected in 6th following a direction parallel or substantially parallel to the Y-Y axis.
  • the verticalized reflector R2 is intended to give images of the source S centered on the Y-Y axis at infinity, that is to say at a distance several tens of meters from the projector.
  • the verticalized reflector R2 is intended to concentrate the beam that it reflects in an opening angle A (Fig.3) at most equal at ⁇ 20 ° on both sides of the Y-Y optical axis.
  • the reflector R2 can have streaks C1, C2 defining at least three facets, namely a central facet 7 constituted by a cylindrical surface portion whose generators are horizontal and perpendicular to the plane of Fig.1, and two side facets 8, 9 slightly folded towards each other compared to the central facet 7.
  • the central facet 7 of the reflector vertically contributes to the range of the beam while the lateral facets 8, 9 contribute to widening the beam reflected by R2.
  • the housing K projector schematized on Fig.2 with a rectangular outline, can be higher than wide.
  • the ellipsoidal reflector R1 produces a light beam having an opening angle B (Fig.3) of approximately ⁇ 40 ° on either side of the axis Y-Y optics.
  • the verticalized reflector R2 is intended to establish the V-cut line, corresponding to the regulation of codes, as will be described in Fig.5.
  • the operation of the projector P is as follows.
  • the ellipsoidal reflector R1 When the light source S is in operation, the ellipsoidal reflector R1 produces a beam of reduced range but wide, to illuminate the aisles.
  • Isolux illumination curves of this beam on a screen perpendicular to the Y-Y optical axis and located 25 m from the projector are represented in FIG. 4, for a particular nonlimiting example.
  • the axis abscissa corresponds to the trace on the screen of the horizontal plane passing by the Y-Y optical axis of the projector.
  • the graduations in% (percent) on this axis corresponds to the tangent of the angle formed between the optical axis and the right going through the focus of the projector and cutting the screen to the level of graduation.
  • the ordinate axis corresponds to the trace on the screen of the vertical plane passing through the optical axis Y-Y.
  • the graduations in% (for cent) of this vertical axis correspond to the tangent of the formed angle between the horizontal plane passing through the optical axis and a straight line through the projector's focus and off the screen at the point of graduation.
  • the isolux curves of the beam produced by the reflector R1 are located essentially below the horizontal plane passing through the optical axis Y-Y.
  • the closed curve L1 of maximum illumination is entirely below the plane horizontal and is substantially symmetrical with respect to the vertical axis.
  • This curve L1 is surrounded by a series of closed curves corresponding to ever weaker illuminations. Some of these curves extend laterally up to ⁇ 70% (corresponding to angles of about ⁇ 35 ° / tg 35 ° ⁇ 0.7).
  • the isolux curve L1 corresponds, in the example under consideration, to a illumination of 6 lux.
  • the maximum illumination is at the center of this curve.
  • the following isolux curves correspond to illuminations which gradually decrease: 3.2 lux for L2, 1.6 lux for L3, 0.7 lux for L4, 0.4 lux for L5, 0.2 lux for L6.
  • the total flux of the beam produced by the reflector ellipsoidal R1 is about 254 lumens.
  • FIG. 5 represents, for the example under consideration, the isolux curves the light beam provided by the verticalized reflector R2 alone.
  • the beam is more concentrated than that of Fig.4 with a cutoff line in V, substantially horizontally to the left of the y-axis and amount to the right along an inclined branch 10.
  • the closed curve isolux of higher illumination V1 is crossed by the vertical axis and extends a little more to the right than to the left, likewise for other isolux curves.
  • This curve V1 corresponds to an illumination of 32 lux.
  • isolux curves V2, V3, V4, V5, V6, V7, V8, V9 and V10 correspond respectively to levels of 24 lux, 20 lux, 16 lux, 12 lux, 6 lux, 3,2 lux, 1,6 lux, 0,7 lux and 0,4 lux.
  • the high illumination of this beam along the axis reflects the range larger than that of the more spread beam (Fig.4) of the reflector ellipsoidal.
  • Fig.6 illustrates the isolux curves of the projector obtained by addition of the respective beams of the ellipsoidal reflector R1 and the verticalized reflector R2. Still for the example considered, the curve LV1 central isolux corresponds to a level of 32 lux. The curves surrounding areas correspond to decreasing levels gradually. The LV5 curve corresponds to a level of 12 lux and the LV10 curve at a level of 0.4 lux.
  • the curves of Fig.6 correspond to a beam bright crossover located, for the left side, basically below of the horizontal plane passing through the optical axis, with a line of oblique cut on the right side rising above the horizontal.
  • the ellipsoidal reflector R1 is located mainly above the horizontal plane passing through the axis the projector's Y-Y optic, the notch 1 being located below this plane, as well as the verticalized reflector R2.
  • the invention applies not only to a projector of crossing P such as the one described, but also to other types of projectors, including a road searchlight. In the latter case the cache 5 would be deleted and there would be no need for lines cutoff for the light beams.
  • the presence of the verticalized reflector R2 allows, in the case of a crossover projector with cover 5, a better performance in flow compared to a projector with a single ellipsoidal reflector full.
  • the gain in flux is of the order of 25% because the light beam produced by the verticalized reflector R2 is not diminished by the cache 5.

Abstract

The projector has a transversal luminous source (S) placed at vicinity of an internal focus (Fi) of an ellipsoidal reflector (R1). A vertical reflector (R2) held at side of an opening (1) opposite to major portion of the reflector (R1) produces a long range rays from rays coming out of source found in the reflector (R1), where the long range rays are not intercepted by lens.

Description

L'invention est relative à un projecteur pour véhicule automobile du genre de ceux qui comportent un réflecteur et une source lumineuse s'étendant transversalement à l'axe optique du réflecteur et placée au voisinage du foyer du réflecteur.The invention relates to a vehicle searchlight automobile of the kind that includes a reflector and a source light extending transversely to the optical axis of the reflector and placed in the vicinity of the focus of the reflector.

On connaít, d'après EP 0 933 585 un projecteur à source transversale avec un réflecteur verticalisé. Par l'expression "réflecteur verticalisé" on désigne un réflecteur s'étendant principalement suivant la direction verticale et dont la surface est déterminée pour réfléchir suivant une direction sensiblement horizontale des rayons lumineux provenant d'une source située au voisinage du foyer du réflecteur. Le projecteur selon EP 0 933 585 permet d'obtenir un faisceau de portée satisfaisante suivant l'axe optique du projecteur, avec une coupure nette du faisceau au-dessous d'un plan horizontal .It is known from EP 0 933 585 a source projector transverse with a verticalized reflector. By the expression "reflector verticalized "is a reflector extending mainly according to vertical direction and whose surface is determined to reflect next a substantially horizontal direction of the light rays coming a source located near the focus of the reflector. The projector according to EP 0 933 585 makes it possible to obtain a beam of satisfactory range along the optical axis of the projector, with a clear cut of the beam below a horizontal plane.

Toutefois la réalisation de l'éclairage des bas-côtés de la route est relativement délicate.However the realization of the lighting of the sides of the road is relatively delicate.

L'invention a pour but, surtout, de fournir un projecteur lumineux qui, tout en conservant les avantages procurés par un projecteur à réflecteur verticalisé, permet d'obtenir de manière simple et efficace une grande largeur de faisceau pour éclairer les bas-côtés.The invention aims, above all, to provide a projector bright, while retaining the benefits of a projector verticalized reflector, provides a simple and effective way a large beam width to illuminate the aisles.

Selon l'invention, un projecteur pour véhicule automobile du genre défini précédemment est caractérisé par le fait que :

  • la source lumineuse transversale est placée au voisinage du foyer interne, d'un réflecteur ellipsoïdal ;
  • la paroi du réflecteur ellipsoïdal comporte une échancrure située d'un côté du plan passant par l'axe géométrique de la source lumineuse et parallèle à l'axe optique du réflecteur ellipsoïdal,
  • une lentille d'axe optique parallèle ou confondu avec celui du réflecteur ellipsoïdal est placée en avant de ce réflecteur, le foyer de la lentille étant voisin du foyer externe du réflecteur ellipsoïdal,
  • et un réflecteur verticalisé est disposé du côté de l'échancrure opposé à la majeure partie du réflecteur ellipsoïdal, ce réflecteur verticalisé étant prévu pour produire, à partir de la source logée dans le réflecteur ellipsoïdal, un faisceau de longue portée qui n'est pas intercepté par la lentille, le réflecteur ellipsoïdal donnant un faisceau étalé de plus faible portée.
According to the invention, a motor vehicle headlamp of the kind defined above is characterized by the fact that:
  • the transverse light source is placed in the vicinity of the internal focus, an ellipsoidal reflector;
  • the wall of the ellipsoidal reflector comprises a notch located on one side of the plane passing through the geometric axis of the light source and parallel to the optical axis of the ellipsoidal reflector,
  • a lens of optical axis parallel or coincidental with that of the ellipsoidal reflector is placed in front of this reflector, the focal point of the lens being close to the external focus of the ellipsoidal reflector,
  • and a verticalized reflector is disposed on the side of the notch opposite the major part of the ellipsoidal reflector, this verticalized reflector being provided to produce, from the source housed in the ellipsoidal reflector, a long-range beam which is not intercepted by the lens, the ellipsoidal reflector giving a spread beam of smaller reach.

Les surfaces du réflecteur verticalisé ont de préférence un foyer se trouvant au voisinage de la source lumineuse. Le réflecteur verticalisé peut comporter des stries délimitant au moins une facette centrale et deux facettes latérales inclinées l'une vers l'autre.The surfaces of the verticalized reflector preferably have a focus located in the vicinity of the light source. The verticalized reflector may include ridges delimiting at least one central facet and two Side facets inclined towards each other.

De préférence , le faisceau produit par le réflecteur verticalisé a un angle d'ouverture au plus égal à ± 20° de part et d'autre de l'axe optique. Le faisceau produit par le réflecteur ellipsoïdal a un angle d'ouverture d'environ ± 40° de part et d'autre de l'axe optique.Preferably, the beam produced by the verticalized reflector has an opening angle at most equal to ± 20 ° on either side of the axis optical. The beam produced by the ellipsoidal reflector has an angle opening of about ± 40 ° on both sides of the optical axis.

Généralement le plan passant par l'axe transversal de la source lumineuse et parallèle à l'axe optique du réflecteur ellipsoïdal est horizontal. De préférence, le réflecteur ellipsoïdal est situé au-dessus de ce plan horizontal tandis que le réflecteur verticalisé est situé au-dessous de ce plan.Generally the plane passing through the transverse axis of the source luminous and parallel to the optical axis of the ellipsoidal reflector is horizontal. Preferably, the ellipsoidal reflector is located above this horizontal plane while the verticalized reflector is located below of this plan.

Le projecteur de l'invention peut être un projecteur de croisement pour véhicule automobile, auquel cas le réflecteur ellipsoïdal comporte un cache situé au voisinage du foyer externe de manière que le faisceau sortant soit essentiellement situé au-dessous d'un niveau déterminé, tandis que le réflecteur verticalisé est prévu pour créer une coupure en V correspondant à celle d'un faisceau de croisement (code).The projector of the invention can be a projector of crossing for a motor vehicle, in which case the ellipsoidal reflector has a cover located in the vicinity of the external focus so that the outgoing beam is essentially located below a level determined, while the verticalized reflector is intended to create a V-cut corresponding to that of a passing beam (code).

Le cache peut être situé au foyer ou en arrière du foyer du réflecteur ellipsoïdal. De préférence le bord supérieur du cache est situé au-dessous du plan horizontal passant par l'axe optique du réflecteur, en particulier à environ 1,5 mm au-dessous. Le cache peut être constitué par une portion de cylindre à génératrices verticales, tournant sa concavité vers l'avant, selon la courbure du champ du réflecteur ellipsoïdal.The cover can be located in the fireplace or behind the fireplace ellipsoidal reflector. Preferably the top edge of the cache is located below the horizontal plane passing through the optical axis of the reflector, especially about 1.5 mm below. The cache can be constituted by a portion of cylinder with vertical generatrices, turning its concavity forward, according to the curvature of the field of the ellipsoidal reflector.

L'axe optique de la lentille est avantageusement décalé, par rapport à l'axe optique du réflecteur ellipsoïdal, du côté de l'échancrure.The optical axis of the lens is advantageously shifted by relative to the optical axis of the ellipsoidal reflector, on the side of the notch.

La lentille peut être disposée de telle sorte que son foyer se trouve en arrière, notamment à environ 1,5 mm en arrière, du foyer externe du réflecteur ellipsoïdal.The lens can be arranged in such a way that its focus backward, including about 1.5 mm back, from the fireplace outer of the ellipsoidal reflector.

En variante, le réflecteur ellipsoïdal peut être situé au-dessous du plan horizontal passant par l'axe transversal de la source lumineuse et parallèle à l'axe optique du réflecteur, tandis que le projecteur verticalisé est situé au-dessus de ce plan. Cette disposition est avantageuse dans le cas où la source lumineuse est une lampe à décharge. Alternatively, the ellipsoidal reflector can be located below of the horizontal plane passing through the transverse axis of the light source and parallel to the optical axis of the reflector, while the verticalized projector is located above this plane. This provision is advantageous in the where the light source is a discharge lamp.

L'invention consiste, mises à part les dispositions exposées ci-dessus, en un certain nombre d'autres dispositions dont il sera plus explicitement question ci-après à propos d'un exemple de réalisation décrit avec référence aux dessins annexés, mais qui n'est nullement limitatif.The invention consists, apart from the arrangements set out above, in a number of other provisions which he will be more explicit question below about an example of realization described with reference to the accompanying drawings, but in no way limiting.

Sur ces dessins :

  • Fig.1 est une coupe schématique d'un projecteur selon l'invention par un plan vertical passant par l'axe optique .
  • Fig 2 est une coupe schématique suivant la ligne II-II de Fig.1.
  • Fig.3 est une coupe schématique suivant la ligne III-III de Fig.1.
  • Fig.4 illustre la photométrie du réflecteur ellipsoïdal.
  • Fig.5 illustre la photométrie du réflecteur verticalisé, et
  • Fig.6 illustre la photométrie de l'ensemble du projecteur.
    • On these drawings:
  • Fig.1 is a schematic sectional view of a projector according to the invention by a vertical plane passing through the optical axis.
  • Fig 2 is a schematic section along the line II-II of Fig.1.
  • Fig.3 is a schematic section along line III-III of Fig.1.
  • Fig.4 illustrates the photometry of the ellipsoidal reflector.
  • Fig.5 illustrates the photometry of the verticalized reflector, and
  • Fig.6 illustrates the photometry of the entire projector.

    • En se reportant aux Figs. 1 à 3, on peut voir un projecteur lumineux P pour véhicule automobile comportant une source S transversale c'est-à-dire dont l'axe géométrique est horizontal et orthogonal à l'axe optique Y-Y du projecteur.Referring to Figs. 1 to 3, we can see a projector illuminated P for a motor vehicle having a source S transversal that is to say whose geometric axis is horizontal and orthogonal to the Y-Y optical axis of the projector.

    La source S peut être constituée par une lampe halogène ayant un filament généralement cylindrique. Dans le cas d'une lampe normalisée H1 ou H7 à filament axial, cette lampe est montée transversalement dans le projecteur tandis que dans le cas d'une lampe normalisée H3 avec filament transversal, cette lampe H3 est montée axialement dans le projecteur.The source S may consist of a halogen lamp having a generally cylindrical filament. In the case of a lamp Normalized H1 or H7 axial filament, this lamp is mounted transversely in the projector while in the case of a lamp standardized H3 with cross filament, this H3 lamp is mounted axially in the projector.

    En variante, la source S peut être constituée par une lampe à décharge produisant un arc généralement cylindrique dont l'axe géométrique moyen est perpendiculaire au plan de Fig. 1.In a variant, the source S may consist of a lamp discharge producing a generally cylindrical arc whose axis geometric mean is perpendicular to the plane of FIG. 1.

    La source S est placée au voisinage du foyer interne Fi d'un réflecteur ellipsoïdal R1. Par "réflecteur ellipsoïdal" on désigne un réflecteur dont la surface est définie à partir de deux foyers respectivement un foyer interne Fi et un foyer externe Fe, cette surface se rapprochant d'un ellipsoïde sans être nécessairement exactement un ellipsoïde.The source S is placed in the vicinity of the internal focus Fi of a ellipsoidal reflector R1. By "ellipsoidal reflector" is meant a reflector whose surface is defined from two foci respectively an internal focal point Fi and an external focus Fe, this surface is closer to an ellipsoid without necessarily being exactly a ellipsoid.

    La paroi du réflecteur ellipsoïdal R1 comporte une échancrure 1 d'un côté du plan passant par l'axe géométrique de la source S et parallèle à l'axe optique Y-Y. Dans l'exemple représenté, le plan en question est le plan horizontal passant par l'axe géométrique de la source S. L'échancrure 1 correspond sensiblement à une coupe de la moitié inférieure du réflecteur R1 par un plan oblique. Le plan de coupe est faiblement incliné de la gauche vers la droite de Fig.1. Vue en plan, selon Fig.3, l'échancrure 1 est limitée par deux bords convergeant vers l'arrière de la source S. Les extrémités arrière des bords de l'échancrure 1 sont reliées par un segment orthogonal à l'axe Y-Y. L'échancrure 1 est prévue pour laisser passer vers le bas, du côté opposé à la majeure partie du réflecteur R1, un maximum de lumière provenant de la source S.The wall of the ellipsoidal reflector R1 has an indentation 1 on one side of the plane passing through the geometric axis of source S and parallel to the Y-Y optical axis. In the example shown, the plane in question is the horizontal plane passing through the geometric axis of the source S. The notch 1 corresponds substantially to a cut of half lower reflector R1 by an oblique plane. The cutting plane is slightly inclined from left to right of Fig.1. Plan view, according to 3, the indentation 1 is limited by two edges converging towards the rear from the source S. The rear ends of the edges of the indentation 1 are connected by a segment orthogonal to the Y-Y axis. The notch 1 is planned to let down, on the opposite side to most of the reflector R1, a maximum of light from the source S.

    L'axe optique du réflecteur ellipsoïdal R1 est confondu avec l'axe optique Y-Y du projecteur.The optical axis of the ellipsoidal reflector R1 is confused with the Y-Y optical axis of the projector.

    Une lentille 2, d'axe optique parallèle ou confondu avec l'axe Y-Y, est placée en avant du réflecteur R1 suivant le sens de propagation de la lumière. Le diamètre de la lentille 2 peut être d'environ 50 mm. La lentille 2 est de préférence de faible tirage (par "tirage" on désigne la distance entre la lentille et le foyer externe Fe de R1).A lens 2 having an optical axis parallel to or coincident with the axis Y-Y, is placed in front of the reflector R1 according to the direction of propagation light. The diameter of the lens 2 may be about 50 mm. The lens 2 is preferably of small size (by "pull" is meant the distance between the lens and the external focus Fe of R1).

    Les éléments accessoires du projecteur, notamment glace de fermeture et équipements auxiliaires permettant de maintenir réflecteur, lentille, source lumineuse et autres pièces, ne sont pas représentés car connus en eux-mêmes.The accessory parts of the headlamp, in particular ice-cream closure and auxiliary equipment to maintain reflector, lens, light source and other parts, are not shown because known in themselves.

    Le foyer 3 de la lentille 2 est voisin de, ou confondu avec, le foyer externe Fe du réflecteur R1. De préférence, le foyer 3 de la lentille se trouve en arrière du foyer externe Fe de la lentille 2 d'une distance d, notamment d'environ 1,5 mm.The focus 3 of the lens 2 is close to, or coincident with, the external focus Fe of the reflector R1. Preferably, the focus 3 of the lens lies behind the external focus Fe of lens 2 by a distance d, in particular about 1.5 mm.

    Avantageusement, l'axe optique 4 de la lentille 2 est situé plus bas que l'axe optique Y-Y. En particulier, la distance verticale h entre l'axe optique 4 de la lentille 2 et l'axe optique Y-Y est d'environ 1,5 mm ce qui permet de récupérer davantage de flux lumineux en provenance du réflecteur R1.Advantageously, the optical axis 4 of the lens 2 is located more down as the optical axis Y-Y. In particular, the vertical distance h between the optical axis 4 of the lens 2 and the optical axis Y-Y is about 1.5 mm which allows to recover more luminous flux coming from the reflector R1.

    Le filament de la lampe S peut être situé verticalement au-dessus du foyer interne Fi pour augmenter le flux lumineux issu du réflecteur ellipsoïdal R1.The filament of the S lamp can be located vertically above of the internal fireplace Fi to increase the luminous flux from the ellipsoidal reflector R1.

    Dans le cas représenté sur les Figs. 1 à 3, le projecteur P est prévu pour assurer la fonction code c'est-à-dire pour fournir un faisceau de croisement. Pour éviter que le faisceau lumineux provenant du réflecteur R1 ne comporte une partie située au-dessus du plan horizontal passant par l'axe Y-Y, un cache 5 est disposé au voisinage du foyer externe Fe. Le cache 5 est constitué par une plaquette opaque, par exemple métallique, maintenue par tout moyen approprié . En raison de la courbure du champ, le cache 5 forme une portion de surface cylindrique à génératrices verticales tournant sa concavité vers l'avant. Avantageusement, le bord supérieur du cache 5 est situé au-dessous du plan horizontal passant par Y-Y, à une distance j d'environ 1,5 mm.In the case shown in Figs. 1 to 3, the projector P is intended to provide the function code that is to say to provide a beam crossing. To prevent the light beam from reflector R1 has a portion located above the horizontal plane passing through the Y-Y axis, a cover 5 is disposed in the vicinity of the focus outer cover Fe. The cover 5 is constituted by an opaque plate, by metal example, maintained by any appropriate means. Due to the curvature of the field, the cover 5 forms a portion of surface cylindrical vertical generatrices turning its concavity forward. Advantageously, the upper edge of the cover 5 is located below the horizontal plane passing through Y-Y at a distance of about 1.5 mm.

    Un réflecteur verticalisé R2 est disposé du côté de l'échancrure 1 opposé à la majeure partie du réflecteur ellipsoïdal R1. L'intersection de ce réflecteur verticalisé R2 par un plan vertical passant par l'axe Y-Y est constituée par un arc de courbe voisin d'un arc de parabole ayant un foyer voisin du foyer interne Fi. D'une manière générale, la surface du réflecteur R2 est déterminée de telle sorte qu'un rayon lumineux tel que 6i provenant de la source S soit réfléchi en 6e suivant une direction parallèle ou sensiblement parallèle à l'axe Y-Y.A verticalized reflector R2 is arranged on the side of the notch 1 opposite most of the ellipsoidal reflector R1. The intersection of this verticalized reflector R2 by a vertical plane passing through the Y-Y axis is formed by a curve arc next to a parabola bow having a focus neighbor of the internal focus Fi. In general, the surface of the reflector R2 is determined so that a light ray such as 6i from source S is reflected in 6th following a direction parallel or substantially parallel to the Y-Y axis.

    Le réflecteur verticalisé R2 est prévu pour donner des images de la source S centrées sur l'axe Y-Y à l'infini, c'est-à-dire à une distance de plusieurs dizaines de mètres du projecteur.The verticalized reflector R2 is intended to give images of the source S centered on the Y-Y axis at infinity, that is to say at a distance several tens of meters from the projector.

    En outre, le réflecteur verticalisé R2 est prévu pour concentrer le faisceau qu'il réfléchit dans un angle d'ouverture A (Fig.3) au plus égal à ± 20° de part et d'autre de l'axe optique Y-Y. Le réflecteur R2 peut comporter des stries C1, C2 déterminant au moins trois facettes, à savoir une facette centrale 7 constituée par une portion de surface cylindrique dont les génératrices sont horizontales et perpendiculaires au plan de Fig.1, et deux facettes latérales 8, 9 légèrement repliées l'une vers l'autre par rapport à la facette centrale 7.La facette centrale 7 du réflecteur verticalisé contribue essentiellement à la portée du faisceau tandis que les facettes latérales 8, 9 contribuent à élargir le faisceau réfléchi par R2.In addition, the verticalized reflector R2 is intended to concentrate the beam that it reflects in an opening angle A (Fig.3) at most equal at ± 20 ° on both sides of the Y-Y optical axis. The reflector R2 can have streaks C1, C2 defining at least three facets, namely a central facet 7 constituted by a cylindrical surface portion whose generators are horizontal and perpendicular to the plane of Fig.1, and two side facets 8, 9 slightly folded towards each other compared to the central facet 7.The central facet 7 of the reflector vertically contributes to the range of the beam while the lateral facets 8, 9 contribute to widening the beam reflected by R2.

    Le boítier K du projecteur, schématisé sur Fig.2 avec un contour rectangulaire, peut être plus haut que large.The housing K projector, schematized on Fig.2 with a rectangular outline, can be higher than wide.

    Le réflecteur ellipsoïdal R1 produit un faisceau lumineux ayant un angle d'ouverture B (Fig.3) d'environ ± 40° de part et d'autre de l'axe optique Y-Y.The ellipsoidal reflector R1 produces a light beam having an opening angle B (Fig.3) of approximately ± 40 ° on either side of the axis Y-Y optics.

    Dans l'exemple considéré d'un projecteur P destiné à produire un faisceau de croisement, le réflecteur verticalisé R2 est prévu pour établir la ligne de coupure en V, correspondant à la réglementation des codes, comme cela sera décrit à propos de Fig.5.In the example considered of a projector P intended to produce a passing beam, the verticalized reflector R2 is intended to establish the V-cut line, corresponding to the regulation of codes, as will be described in Fig.5.

    Le fonctionnement du projecteur P est le suivant.The operation of the projector P is as follows.

    Lorsque la source lumineuse S est en fonctionnement, le réflecteur ellipsoïdal R1 produit un faisceau de portée réduite mais de grande largeur, permettant d'éclairer les bas-côtés.When the light source S is in operation, the ellipsoidal reflector R1 produces a beam of reduced range but wide, to illuminate the aisles.

    Les courbes d'éclairement isolux de ce faisceau sur un écran perpendiculaire à l'axe optique Y-Y et situé à 25 m du projecteur sont représentées sur Fig.4, pour un exemple particulier non limitatif. L'axe des abscisses correspond à la trace sur l'écran du plan horizontal passant par l'axe optique Y-Y du projecteur. Les graduations en % (pour cent) sur cet axe correspondent à la tangente de l'angle formé entre l'axe optique et la droite passant par le foyer du projecteur et coupant l'écran au niveau de la graduation. L'axe des ordonnées correspond à la trace sur l'écran du plan vertical passant par l'axe optique Y-Y. Les graduations en % (pour cent) de cet axe vertical correspondent à la tangente de l'angle formé entre le plan horizontal passant par l'axe optique et une droite qui passe par le foyer du projecteur et coupe l'écran à l'endroit de la graduation .Isolux illumination curves of this beam on a screen perpendicular to the Y-Y optical axis and located 25 m from the projector are represented in FIG. 4, for a particular nonlimiting example. The axis abscissa corresponds to the trace on the screen of the horizontal plane passing by the Y-Y optical axis of the projector. The graduations in% (percent) on this axis corresponds to the tangent of the angle formed between the optical axis and the right going through the focus of the projector and cutting the screen to the level of graduation. The ordinate axis corresponds to the trace on the screen of the vertical plane passing through the optical axis Y-Y. The graduations in% (for cent) of this vertical axis correspond to the tangent of the formed angle between the horizontal plane passing through the optical axis and a straight line through the projector's focus and off the screen at the point of graduation.

    On voit, d'après Fig.4, que les courbes isolux du faisceau produit par le réflecteur R1 sont situées essentiellement au-dessous du plan horizontal passant par l'axe optique Y-Y. La courbe fermée L1 d'éclairement maximal est entièrement située au-dessous du plan horizontal et est sensiblement symétrique par rapport à l'axe vertical. Cette courbe L1 est entourée par une suite de courbes fermées correspondant à des éclairements de plus en plus faibles. Certaines de ces courbes s'étendent latéralement jusqu'à ± 70 % (ce qui correspond à des angles d'environ ± 35° / tg 35° ∼ 0.7).It can be seen from Fig. 4 that the isolux curves of the beam produced by the reflector R1 are located essentially below the horizontal plane passing through the optical axis Y-Y. The closed curve L1 of maximum illumination is entirely below the plane horizontal and is substantially symmetrical with respect to the vertical axis. This curve L1 is surrounded by a series of closed curves corresponding to ever weaker illuminations. Some of these curves extend laterally up to ± 70% (corresponding to angles of about ± 35 ° / tg 35 ° ~ 0.7).

    La courbe isolux L1 correspond, dans l'exemple considéré, à un éclairement de 6 lux. L'éclairement maximal se trouve au centre de cette courbe. Les courbes isolux suivantes correspondent à des éclairements qui diminuent progressivement : 3,2 lux pour L2, 1,6 lux pour L3, 0.7 lux pour L4, 0.4 lux pour L5, 0.2 lux pour L6.The isolux curve L1 corresponds, in the example under consideration, to a illumination of 6 lux. The maximum illumination is at the center of this curve. The following isolux curves correspond to illuminations which gradually decrease: 3.2 lux for L2, 1.6 lux for L3, 0.7 lux for L4, 0.4 lux for L5, 0.2 lux for L6.

    Selon Fig.4, le flux total du faisceau produit par le réflecteur ellipsoïdal R1 est d'environ 254 lumens.According to FIG. 4, the total flux of the beam produced by the reflector ellipsoidal R1 is about 254 lumens.

    Fig.5 représente, pour l'exemple considéré, les courbes isolux du faisceau lumineux fourni par le réflecteur verticalisé R2 seul. Le faisceau est plus concentré que celui de Fig.4 avec une ligne de coupure en V, sensiblement à l'horizontale à gauche de l'axe des ordonnées et montant vers la droite suivant une branche inclinée 10. La courbe fermée isolux de plus fort éclairement V1 est traversée par l'axe vertical et s'étend un peu plus vers la droite que vers la gauche, de même pour les autres courbes isolux. Cette courbe V1 correspond à un éclairement de 32 lux. Les courbes isolux suivantes V2, V3, V4, V5, V6, V7, V8, V9 et V10 correspondent respectivement à des niveaux de 24 lux, 20 lux, 16 lux, 12 lux, 6 lux, 3,2 lux, 1,6 lux, 0,7 lux et 0,4 lux.FIG. 5 represents, for the example under consideration, the isolux curves the light beam provided by the verticalized reflector R2 alone. The beam is more concentrated than that of Fig.4 with a cutoff line in V, substantially horizontally to the left of the y-axis and amount to the right along an inclined branch 10. The closed curve isolux of higher illumination V1 is crossed by the vertical axis and extends a little more to the right than to the left, likewise for other isolux curves. This curve V1 corresponds to an illumination of 32 lux. The following isolux curves V2, V3, V4, V5, V6, V7, V8, V9 and V10 correspond respectively to levels of 24 lux, 20 lux, 16 lux, 12 lux, 6 lux, 3,2 lux, 1,6 lux, 0,7 lux and 0,4 lux.

    L'éclairement élevé de ce faisceau suivant l'axe traduit la portée plus grande que celle du faisceau plus étalé (Fig.4) du réflecteur ellipsoïdal.The high illumination of this beam along the axis reflects the range larger than that of the more spread beam (Fig.4) of the reflector ellipsoidal.

    Fig.6 illustre les courbes isolux du projecteur obtenues par addition des faisceaux respectifs du réflecteur ellipsoïdal R1 et du réflecteur verticalisé R2. Toujours pour l'exemple considéré, la courbe isolux centrale LV1 correspond à un niveau de 32 lux. Les courbes suivantes qui l'entourent correspondent à des niveaux diminuant progressivement. La courbe LV5 correspond à un niveau de 12 lux et la courbe LV10 à un niveau de 0,4 lux.Fig.6 illustrates the isolux curves of the projector obtained by addition of the respective beams of the ellipsoidal reflector R1 and the verticalized reflector R2. Still for the example considered, the curve LV1 central isolux corresponds to a level of 32 lux. The curves surrounding areas correspond to decreasing levels gradually. The LV5 curve corresponds to a level of 12 lux and the LV10 curve at a level of 0.4 lux.

    Les courbes de Fig.6 correspondent bien à un faisceau lumineux de croisement situé, pour la partie gauche, essentiellement au-dessous du plan horizontal passant par l'axe optique, avec une ligne de coupure oblique sur la partie droite montant au-dessus de l'horizontale.The curves of Fig.6 correspond to a beam bright crossover located, for the left side, basically below of the horizontal plane passing through the optical axis, with a line of oblique cut on the right side rising above the horizontal.

    Dans la description qui précède, le réflecteur ellipsoïdal R1 est situé principalement au-dessus du plan horizontal passant par l'axe optique Y-Y du projecteur, l'échancrure 1 étant située au-dessous de ce plan, de même que le réflecteur verticalisé R2.In the above description, the ellipsoidal reflector R1 is located mainly above the horizontal plane passing through the axis the projector's Y-Y optic, the notch 1 being located below this plane, as well as the verticalized reflector R2.

    Une disposition inverse est possible, c'est-à-dire avec le réflecteur verticalisé R2 au-dessus du plan horizontal passant par l'axe Y-Y et avec le réflecteur ellipsoïdal R1 en majeure partie au-dessous de ce plan. L'échancrure du réflecteur R1 se trouverait alors au-dessus du plan horizontal passant par Y-Y. Pour une telle disposition inversée, les surfaces réfléchissantes sont recalculées de manière à fournir les faisceaux souhaités. Une telle disposition inversée convient en particulier pour une source lumineuse S constituée par une lampe à décharge.An inverse arrangement is possible, that is to say with the verticalized reflector R2 above the horizontal plane passing through the Y-axis and with the ellipsoidal reflector R1 for the most part below this plan. The indentation of the reflector R1 would then be above the plane horizontal passing through Y-Y. For such an inverted arrangement, the reflective surfaces are recalculated so as to provide the desired beams. Such an inverted arrangement is particularly suitable for a light source S constituted by a discharge lamp.

    L'invention s'applique non seulement à un projecteur de croisement P tel que celui qui a été décrit, mais aussi à d'autres types de projecteurs, notamment un projecteur de route. Dans ce dernier cas le cache 5 serait supprimé et il ne serait pas nécessaire de prévoir de lignes de coupure pour les faisceaux lumineux.The invention applies not only to a projector of crossing P such as the one described, but also to other types of projectors, including a road searchlight. In the latter case the cache 5 would be deleted and there would be no need for lines cutoff for the light beams.

    La présence du réflecteur verticalisé R2 permet, dans le cas d'un projecteur de croisement avec cache 5, un meilleur rendement en flux par rapport à un projecteur avec un seul réflecteur ellipsoïdal complet. Le gain en flux est de l'ordre de 25% car le faisceau lumineux produit par le réflecteur verticalisé R2 n'est pas diminué par le cache 5.The presence of the verticalized reflector R2 allows, in the case of a crossover projector with cover 5, a better performance in flow compared to a projector with a single ellipsoidal reflector full. The gain in flux is of the order of 25% because the light beam produced by the verticalized reflector R2 is not diminished by the cache 5.

    Avec un réflecteur verticalisé classique seul, il était relativement difficile d'assurer la largeur du faisceau et il fallait utiliser des réflexions sur les joues du miroir. Ces difficultés disparaissent avec la solution de l'invention puisque le réflecteur ellipsoïdal R1 assure l' étalement.With a classic verticalized reflector alone, he was relatively difficult to ensure beam width and it was necessary to use reflections on the cheeks of the mirror. These difficulties disappear with the solution of the invention since the ellipsoidal reflector R1 ensures the sprawl.

    Claims (12)

    Projecteur pour véhicule automobile comportant un réflecteur et une source lumineuse (S) s'étendant transversalement à l'axe optique (Y-Y) du réflecteur et placée au voisinage du foyer du réflecteur, caractérisé par le fait que : la source lumineuse transversale (S) est placée au voisinage du foyer interne (Fi) d'un réflecteur ellipsoïdal (R1) ; la paroi du réflecteur ellipsoïdal comporte une échancrure (1) située d'un côté du plan passant par l'axe géométrique de la source lumineuse (S) et parallèle à l'axe optique (Y-Y) du réflecteur ellipsoïdal, une lentille (2) d'axe optique parallèle ou confondu avec celui du réflecteur ellipsoïdal (R1) est placée en avant de ce réflecteur, le foyer (3) de la lentille étant voisin du foyer externe (Fe) du réflecteur ellipsoïdal, et un réflecteur verticalisé (R2) est disposé du côté de l'échancrure (1) opposé à la majeure partie du réflecteur ellipsoïdal (R1), ce réflecteur verticalisé (R2) étant prévu pour produire, à partir de la source (S) logée dans le réflecteur ellipsoïdal, un faisceau de longue portée qui n'est pas intercepté par la lentille, le réflecteur ellipsoïdal donnant un faisceau étalé de plus faible portée. Motor vehicle headlamp comprising a reflector and a light source (S) extending transversely to the optical axis (YY) of the reflector and placed in the vicinity of the reflector focal point, characterized in that : the transverse light source (S) is placed in the vicinity of the internal focus (Fi) of an ellipsoidal reflector (R1); the wall of the ellipsoidal reflector comprises a notch (1) located on one side of the plane passing through the geometric axis of the light source (S) and parallel to the optical axis (YY) of the ellipsoidal reflector, a lens (2) of optical axis parallel or coincident with that of the ellipsoidal reflector (R1) is placed in front of this reflector, the focus (3) of the lens being close to the external focus (Fe) of the ellipsoidal reflector, and a verticalized reflector (R2) is disposed on the side of the indentation (1) opposite the major part of the ellipsoidal reflector (R1), this verticalized reflector (R2) being provided to produce, from the source (S) housed in the ellipsoidal reflector, a long-range beam that is not intercepted by the lens, the ellipsoidal reflector giving a spread beam of smaller reach. Projecteur selon la revendication 1, caractérisé par le fait que les surfaces (7,8,9) du réflecteur verticalisé (R2) ont un foyer se trouvant au voisinage de la source lumineuse (S).Projector according to Claim 1, characterized in that the surfaces (7, 8, 9) of the verticalized reflector (R2) have a focus located in the vicinity of the light source (S). Projecteur selon la revendication 1 ou 2, caractérisé par le fait que le réflecteur verticalisé (R2) comporte des stries (C1, C2) délimitant au moins une facette centrale (7) et deux facettes latérales (8,9) inclinées l'une vers l'autre.Projector according to claim 1 or 2, characterized in that the verticalized reflector (R2) has ridges (C1, C2) delimiting at least one central facet (7) and two lateral facets (8, 9) inclined towards one the other. Projecteur selon l'une des revendications 1 à 3, caractérisé par le fait que le faisceau produit par le réflecteur verticalisé (R2) a un angle d'ouverture (A) au plus égal à ± 20° de part et d'autre de l'axe optique.Projector according to one of claims 1 to 3, characterized in that the beam produced by the verticalized reflector (R2) has an opening angle (A) at most equal to ± 20 ° on either side of the optical axis. Projecteur selon l'une des revendications précédentes, caractérisé par le fait que le faisceau produit par le réflecteur ellipsoïdal (R1) a un angle d'ouverture (B) d'environ ± 40° de part et d'autre de l'axe optique. Projector according to one of the preceding claims, characterized in that the beam produced by the ellipsoidal reflector (R1) has an opening angle (B) of approximately ± 40 ° on either side of the optical axis . Projecteur selon l'une des revendications précédentes, dans lequel le plan passant par l'axe transversal de la source lumineuse (S) et parallèle à l'axe optique (Y-Y) du réflecteur ellipsoïdal est horizontal, caractérisé par le fait que le réflecteur ellipsoïdal (R1) est situé au-dessus de ce plan horizontal tandis que le réflecteur verticalisé (R2) est situé au-dessous de ce plan.Projector according to one of the preceding claims, in which the plane passing through the transverse axis of the light source (S) and parallel to the optical axis (YY) of the ellipsoidal reflector is horizontal, characterized in that the ellipsoidal reflector (R1) is located above this horizontal plane while the verticalized reflector (R2) is located below this plane. Projecteur de croisement selon l'une des revendications précédentes caractérisé par le fait que le réflecteur ellipsoïdal (R1) comporte un cache (5) situé au voisinage du foyer externe (Fe) de manière que le faisceau sortant soit essentiellement situé au-dessous d'un niveau déterminé, tandis que le réflecteur verticalisé (R2) est prévu pour créer une coupure en V correspondant à celle d'un faisceau de croisement.Crossover projector according to one of the preceding claims, characterized in that the ellipsoidal reflector (R1) comprises a cover (5) located in the vicinity of the external focus (Fe) so that the outgoing beam is essentially located below a determined level, while the verticalized reflector (R2) is provided to create a V cut corresponding to that of a beam dipped. Projecteur de croisement selon la revendication 7, caractérisé par le fait que le le bord supérieur du cache (5) est situé au-dessous du plan horizontal passant par l'axe optique du réflecteur, en particulier d'environ 1,5 mm au-dessous.Crossover projector according to Claim 7, characterized in that the upper edge of the cover (5) lies below the horizontal plane passing through the optical axis of the reflector, in particular about 1.5 mm above the below. Projecteur selon l'une des revendications précédentes caractérisé par le fait que l'axe optique de la lentille (2) est décalé (h) par rapport à l'axe optique (Y-Y) du réflecteur ellipsoïdal, du côté de l'échancrure (1).Projector according to one of the preceding claims, characterized in that the optical axis of the lens (2) is offset (h) with respect to the optical axis (YY) of the ellipsoidal reflector, on the side of the notch (1 ). Projecteur selon l'une des revendications précédentes caractérisé par le fait que la lentille (2) est disposée de telle sorte que son foyer (3) se trouve en arrière, notamment à environ 1,5 mm en arrière, du foyer externe (Fe) du réflecteur ellipsoïdal.Projector according to one of the preceding claims, characterized in that the lens (2) is arranged in such a way that its focus (3) is rearward, in particular about 1.5 mm backwards, from the external focus (Fe) of the ellipsoidal reflector. Projecteur selon l'une des revendications 1 à 5, dans lequel le plan passant par l'axe transversal de la source lumineuse (S) et parallèle à l'axe optique (Y-Y) du réflecteur ellipsoïdal est horizontal, caractérisé par le fait que le réflecteur ellipsoïdal (R1) est situé au-dessous du plan horizontal passant par l'axe transversal de la source lumineuse (S) et parallèle à l'axe optique (Y-Y) du réflecteur, tandis que le réflecteur verticalisé (R2) est situé au-dessus de ce plan. Projector according to one of claims 1 to 5, wherein the plane passing through the transverse axis of the light source (S) and parallel to the optical axis (YY) of the ellipsoidal reflector is horizontal, characterized in that the ellipsoidal reflector (R1) is located below the horizontal plane passing through the transverse axis of the light source (S) and parallel to the optical axis (YY) of the reflector, while the verticalized reflector (R2) is located at above this plan. Projecteur selon la revendication 11, caractérisé par le fait que la source lumineuse (S) est une lampe à décharge.Headlight according to Claim 11, characterized in that the light source (S) is a discharge lamp.
    EP03293144A 2002-12-24 2003-12-12 Motor vehicle headlamp with a transverse light source Expired - Lifetime EP1433999B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR0216607 2002-12-24
    FR0216607A FR2849159B1 (en) 2002-12-24 2002-12-24 TRANSVERSE LUMINOUS SOURCE PROJECTOR FOR MOTOR VEHICLE

    Publications (2)

    Publication Number Publication Date
    EP1433999A1 true EP1433999A1 (en) 2004-06-30
    EP1433999B1 EP1433999B1 (en) 2010-09-22

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    EP03293144A Expired - Lifetime EP1433999B1 (en) 2002-12-24 2003-12-12 Motor vehicle headlamp with a transverse light source

    Country Status (7)

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    US (1) US7125150B2 (en)
    EP (1) EP1433999B1 (en)
    JP (1) JP4606021B2 (en)
    AT (1) ATE482361T1 (en)
    DE (1) DE60334278D1 (en)
    ES (1) ES2353377T3 (en)
    FR (1) FR2849159B1 (en)

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    EP1538393A1 (en) * 2003-12-05 2005-06-08 Valeo Vision Vehicle headlight with vertical orientation
    FR2863342A1 (en) * 2003-12-05 2005-06-10 Valeo Vision VERTICALIZED PROJECTOR FOR MOTOR VEHICLE
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    Also Published As

    Publication number Publication date
    JP4606021B2 (en) 2011-01-05
    ES2353377T3 (en) 2011-03-01
    FR2849159A1 (en) 2004-06-25
    US20040240223A1 (en) 2004-12-02
    JP2004207245A (en) 2004-07-22
    FR2849159B1 (en) 2005-02-18
    US7125150B2 (en) 2006-10-24
    EP1433999B1 (en) 2010-09-22
    ATE482361T1 (en) 2010-10-15
    DE60334278D1 (en) 2010-11-04

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