EP1538393A1 - Vehicle headlight with vertical orientation - Google Patents
Vehicle headlight with vertical orientation Download PDFInfo
- Publication number
- EP1538393A1 EP1538393A1 EP04292799A EP04292799A EP1538393A1 EP 1538393 A1 EP1538393 A1 EP 1538393A1 EP 04292799 A EP04292799 A EP 04292799A EP 04292799 A EP04292799 A EP 04292799A EP 1538393 A1 EP1538393 A1 EP 1538393A1
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- EP
- European Patent Office
- Prior art keywords
- reflector
- optical axis
- projector according
- ellipsoidal reflector
- ellipsoidal
- 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.)
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Classifications
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- 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
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- 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
- F21S41/337—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector having a structured surface, e.g. with facets or corrugations
Definitions
- the invention relates to a projector for a motor vehicle, including a projector of the type called “verticalized” and comprising at least one reflector associated with at least one light source preferably placed at near the focus of the reflector.
- a headlamp which, when mounted on the vehicle for which it is intended, a dimension height significantly larger than its width: it is a projector that extends mainly in a vertical direction a once mounted, which is therefore significantly higher than be mounted not exactly vertical in the body of the vehicle).
- This verticalization is generally induced by the arrangement of the reflector of the projector (of the main projector if there are several), also arranged in the projector so as to be higher than wide once on the vehicle.
- the object of the invention is to provide a projector intended to equip which, while retaining the benefits of a verticalized reflector, allows to obtain better optical performances, in particular to obtain in a simple and effective way a large width of beam to illuminate the aisles.
- the invention in the alternative, seeks to get a vertical type projector that can be of dimensions compact, especially with regard to its depth.
- the invention thus devised a vehicle lighting device which combines two types of reflectors: an ellipsoidal reflector associated with a lens of the type found, for example, in elliptical modules, and a verticalized reflector, preferably sharing the same focal length.
- the reflector ellipsoidal will rather contribute to the overall beam in the definition of its width, while the verticalized reflector will be used more to define the scope and possibly the cutoff of the overall beam.
- the beam produced by the ellipsoidal reflector (R1) helps define the width of the entire beam.
- the beam produced by the verticalized reflector (R2) helps define the range, and possibly the cut, the complete beam.
- the axis of the light source (S) is arranged in a substantially horizontal plane.
- this is an angle ⁇ understood between 0 and 80 °, for example between 0 ° and 70 °, in particular between 0 and 50 ° or between 0 and 45 ° with the optical axis (YY) of the ellipsoidal reflector (R1).
- the surfaces of the verticalized reflector preferably have a focus finding in the vicinity of the light source.
- the verticalized reflector can have ridges delimiting at least one central facet and two facets sideways inclined towards each other.
- the beam produced by the verticalized reflector has an opening angle at most equal to ⁇ 15 ° on either side of the optical axis.
- the beam produced by the ellipsoidal reflector has an opening angle of about ⁇ 40 ° on either side of the optical axis.
- the plane passing through the axis of the light source (S) is substantially horizontal, the ellipsoidal reflector (R1) being located above this plane and the verticalized reflector (R2) being located below this plane.
- the projector of the invention may be a dipped beam (or code) for a motor vehicle, in which case the ellipsoidal reflector has a cache located in the vicinity of the external focus so that the outgoing beam is essentially below a certain level, while the reflector vertically is intended to create a V-shaped cut corresponding to that of a passing beam.
- the cover can be located at the focus or behind the reflector focus ellipsoidal.
- the upper edge of the cache is located below the horizontal plane passing through the optical axis of the reflector, in particular between 0 and 2 mm below, in particular between 0.5 and 1.8 mm or between 0.7 and 1.7 mm in below, for example about 1.5 mm below.
- the choice of this rating depends on the definition of the ellipsoidal mirror.
- This cache layout is advantageous, because it makes it possible to recover a non-annoying portion of flows extra light.
- the cover can be constituted by a portion of a cylinder with generators vertically, turning its concavity forward, according to the curvature of the field of ellipsoidal reflector.
- the cache can also have other geometric definitions, for example, be plane. The choice of its shape may depend on the chromaticism of the lens associated with the ellipsoidal mirror.
- the optical axis of the lens is advantageously offset with respect to the optical axis of the ellipsoidal reflector, on the side of the notch.
- the lens can be arranged so that its focus is in back, especially at the same level as the top edge of the cache when it is present, and for example about 0.5 to 2 mm back, for example 1.5 mm in rear of the outer focus of the ellipsoidal reflector. This distance may depend, in particular, the focal length of the lens and the definition of the ellipsoid. (The lens can also be exactly at the level of the external focus). This configuration of the lens behind the external focus optimizes the recovery of the maximum luminous flux over the cutoff when there is a hidden.
- the ellipsoidal reflector may be located below the plane horizontally 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 of this plan.
- the light source is a discharge lamp (or xenon lamp).
- FIGS. 1-3 one can see a bright spotlight P for a motor vehicle comprising a source S whose geometric axis is in a substantially horizontal plane and whose orientation with respect to the axis Y-Y optical of the projector is variable.
- Figure 1 shows an orientation of the source parallel to the optical axis, we will speak of axial orientation.
- Figure 2 only symbolizes it in the form of a cross, which is the point where the center of the filament.
- FIG. 3 represents the optical axis YY and the axis of the source XX, with two possible configurations of the source: the one where the angle ⁇ what the two axes do is 0 °, and that where the angle ⁇ that the two axes make between they are 45 degrees.
- the source S can be constituted by a halogen lamp having a generally cylindrical filament.
- this lamp is mounted axially or obliquely in the projector, while in the case of a lamp standardized H3 with cross filament, this H3 lamp is mounted transversely or obliquely in the projector.
- the source S may be constituted by a xenon lamp producing a generally cylindrical arc and in the axis of the lamp: everything is then, in the sense of the invention, as if we were dealing with a lamp axial filament halogen with regard to the orientation of the lamp.
- the source S is placed in the vicinity of the internal focal point Fi of a reflector ellipsoidal R1.
- ellipsoidal reflector is meant a reflector whose surface is defined from two homes respectively an internal focus Fi and a focus externally Fe, this surface approximating an ellipsoid without being necessarily exactly an ellipsoid.
- the wall of the ellipsoidal reflector R1 in the case where one uses a halogen lamp, has a notch 1 on one side of the plane passing through the axis geometric source S and parallel to the optical axis Y-Y.
- the plane in question is the horizontal plane passing through the axis geometry of the source S.
- the notch 1 corresponds substantially to a cutting the lower half of the reflector R1 by an oblique plane.
- the plan of cut is slightly inclined from the left to the right of Fig.1.
- the notch 1 is bounded by two edges converging towards the rear of the S source. rear ends of the edges of the notch 1 are connected by a segment orthogonal to the Y-Y axis.
- the notch 1 is intended to let down, on the side opposite to most of the reflector R1, a maximum of light from the source S.
- the optical axis of the ellipsoidal reflector R1 coincides with the axis Y-Y optical projector.
- a lens 2 with an optical axis parallel to or coincident with the Y-axis, is placed in front of the reflector R1 according to the direction of propagation of the light.
- the lens diameter 2 may be about 50 mm.
- Lens 2 is preferably low draw (by "draw” is the distance between the lens and the focus external Fe of R1).
- the invention also applies to lenses of diameter upper, 60 or 70 mm.
- 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 mistaken for, the focus external Fe of the reflector R1.
- the focus 3 of the lens is in rear of the external focus Fe of the lens 2 by a distance d, in particular about 1.5 mm.
- the optical axis 4 of the lens 2 is located lower as the optical axis Y-Y.
- the vertical distance h between the optical axis 4 of the lens 2 and the Y-Y optical axis is approximately 1.5 mm, which allows recover more light flux from the reflector R1.
- the filament of the S lamp can be located vertically above the internal focus Fi to increase the luminous flux from the ellipsoidal reflector R1.
- the projector P is provided to ensure the function code that is to say to provide a passing beam.
- a cover 5 is disposed in the vicinity of the external focus Fe.
- the cache 5 is constituted by a opaque wafer, for example metallic, maintained by any appropriate means. Because of the curvature of the field, the cache 5 is flat, and has a profile corresponding to the inverted image in relation to the horizontal of the cut sought.
- the upper edge of the cover 5 is located below the horizontal plane passing through Y-Y at a distance of about 1 mm.
- the cache dimensions are at most equal to the horizontal opening of the ellipsoid of the reflector R1.
- a verticalized reflector R2 is arranged on the side of the notch 1 opposite the major part of the ellipsoidal reflector R1.
- the intersection of this verticalized reflector R2 by a vertical plane passing through the Y-Y axis is constituted by a curve arc next to a parabola with a focus near the focus Internal Fi.
- the surface of the reflector R2 is determined by such that a light beam such as 6i from source S is reflected 6th in a direction parallel to 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 of several dozens of meters from the projector.
- the verticalized reflector R2 is intended to focus the beam which it reflects in an angle of opening at most equal to ⁇ 15 ° of other of the Y-Y optical axis.
- the reflector R2 can comprise streaks C1, C2 determining at least three facets, namely a central facet constituted by a portion of cylindrical surface whose generatrices are horizontal and perpendicular to the plane of Figure 1, and two lateral facets slightly folded towards each other with respect to the central facet.
- the central facet of vertical reflector contributes essentially to the range of the beam, one of the lateral facets helps to widen the beam reflected by R2 and the other facet side contributes to the range of the beam.
- the housing of the projector for example has an outline rectangular, noticeably higher than wide.
- the ellipsoidal reflector R1 produces a light beam having a opening angle of about ⁇ 40 ° on both sides of the Y-Y optical axis.
- the verticalized reflector R2 is intended to establish the line V cut, corresponding to the regulation of codes in Europe.
- the operation of the projector P is as follows.
- the reflector ellipsoidal R1 produces a beam of reduced range but wide, to illuminate the aisles.
- This example refers to a 45 ° oblique configuration of the source, which is a lamp H 7
- 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 FIGS. 4 and 5, respectively corresponding to the portion of the beam from the verticalized reflector R2 and the beam portion of the projector from the ellipsoidal reflector R1.
- the abscissa axis corresponds to the trace on the screen of the horizontal plane passing through the optical axis Y-Y of the projector.
- the graduations in% (percent) on this axis correspond to the tangent of the angle formed between the optical axis and the straight line passing through the focus of projector and cutting the screen at the level of the graduation.
- the y-axis corresponds to the trace on the screen of the vertical plane passing through the optical axis Y-Y.
- the graduations in% (percent) of this vertical axis correspond to the tangent the angle formed between the horizontal plane passing through the optical axis and a straight line which goes through the focus of the projector and cuts off the screen at the point of graduation.
- the isolux curves of the beam produced by the verticalized reflector delimit the specific V cut of a beam code.
- the closed curve L1 of maximum illumination is located below the plane horizontal, and is offset from the vertical axis to the right, lying under the oblique line of the cut.
- This curve L1 is surrounded by a sequence closed curves corresponding to increasingly weak illuminations. Some of these curves extend laterally up to ⁇ 15 °.
- the isolux curve L1 corresponds, in the example under consideration, to a illumination of 24 lux.
- the maximum illumination is at the center of this curve.
- the following isolux curves correspond to decreasing illuminations gradually: 20 lux for L2, 16 lux for L3, 12 lux for L4, 6 lux for L5, 3.2 lux for L6.
- FIG. 5 thus represents the part of the beam coming from the ellipsoidal reflector.
- the isolux are much wider, what we are looking for as the main function of the mirror R1. This results in an illuminating beam the low sides and bringing comfort in front of the vehicle.
- the curve V1 maximum illumination is essentially below the horizontal axis, and distributed part and others of the vertical axis.
- This example relates to an axial configuration of the source, which is a H 7 lamp.
- 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 FIGS. 6 and 7, respectively corresponding to the portion of the beam from the verticalized reflector R2 and the beam portion of the projector from the ellipsoidal reflector R1.
- the maximum isolux according to the Figure 7 is substantially below the horizontal plane, and distributed approximately symmetrically with respect to the vertical axis. The value maximum is 19.5 lux with regard to Figure 6 ..
- Figures 8 and 9 illustrate the photometry of the global beams according to the Examples 1 and 2.
- the total flow according to Example 1 in axial orientation of the source ( Figure 8) is 434.95 lumen. It is 352.16 lumens in the case of the example 2 in oblique orientation of the source ( Figure 9).
- the common advantage to these two examples is that, whatever the orientation, the source, we get a V of clean cut, satisfactory, with the mirror R2, and with a sufficient luminous flux. We note also the flux increases when the angle ⁇ goes from 45 to 0 °.
- a Axial orientation of the source thus has the added benefit of a stream more important than in oblique orientation: the gain of flow is not negligible (about 25%).
- the ellipsoidal reflector R1 is located mainly above the horizontal plane passing through the Y-Y optical axis of the projector, the notch 1 being located below this plane, as well as the verticalized reflector R2.
- the invention applies not only to a crossover projector P such as the one described, but also to other types of projectors, including a road searchlight.
- the cache 5 is deleted, and the surfaces of the mirror R2 are recalculated so as to center the maximum isolux on the point (0,0) of the isolux curve, point also called point HV.
- the presence of the verticalized reflector R2 makes it possible, in the case of a crossing headlamp with 5 cover, better flow performance compared to a projector with a single full ellipsoidal reflector.
- the gain in flow is the order of 25% because the light beam produced by the verticalized reflector R2 is not decreased by cache 5.
- the invention makes it possible to adapt a projector according to the invention, the optical surfaces of the reflectors of which are fixed, as a function of dimensional or photometric constraints, adjusting appropriately the orientation of the lamp with respect to the optical axis, which is simple, surprising and effective.
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- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
Description
L'invention est relative à un projecteur pour véhicule automobile, notamment un projecteur du type dit " verticalisé " et comportant au moins un réflecteur associé à au moins une source lumineuse placée de préférence au voisinage du foyer du réflecteur. On entend sous ce terme, au sens de l'invention, un projecteur qui, une fois monté sur le véhicule auquel il est destiné, présente une hauteur de dimension significativement plus importante que sa largeur : c'est un projecteur qui s'étend principalement suivant une direction verticale une fois monté, et qui est donc significativement plus haut que large (même s'il peut être monté de façon non exactement verticale dans la carrosserie du véhicule). Cette verticalisation est généralement induite par la disposition du réflecteur du projecteur (du projecteur principal s'il y en a plusieurs), lui aussi disposé dans le projecteur de façon à être plus haut que large une fois sur le véhicule. Ces projecteurs dits " verticalisés " sont intéressants, d'abord car ils offrent de nouvelles possibilités en termes de performances optiques, ensuite car cela leur confère un style original.The invention relates to a projector for a motor vehicle, including a projector of the type called "verticalized" and comprising at least one reflector associated with at least one light source preferably placed at near the focus of the reflector. Under this term is meant, in the sense of the invention, a headlamp which, when mounted on the vehicle for which it is intended, a dimension height significantly larger than its width: it is a projector that extends mainly in a vertical direction a once mounted, which is therefore significantly higher than be mounted not exactly vertical in the body of the vehicle). This verticalization is generally induced by the arrangement of the reflector of the projector (of the main projector if there are several), also arranged in the projector so as to be higher than wide once on the vehicle. These so-called "verticalized" projectors are interesting, first of all because they offer new possibilities in terms of optical performance, then because they confers an original style.
Il est connu du brevet EP 0 933 585 un projecteur à source lumineuse disposée transversalement à l'axe optique du réflecteur auquel elle est associée, ce réflecteur étant de type " verticalisé " . Comme déjà explicité plus haut, on comprend par l'expression "réflecteur verticalisé", un réflecteur s'étendant principalement suivant la direction verticale, une fois le projecteur monté dans le véhicule, 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 le brevet 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 patent EP 0 933 585 a light source projector disposed transversely to the optical axis of the reflector with which it is associated, this reflector being of the "verticalized" type. As already explained above, we includes the expression "vertical reflector", a reflector extending mainly in the vertical direction, once the projector is mounted in the vehicle, whose surface is determined to reflect in one direction substantially horizontal light rays from a source located at near the focus of the reflector. The projector according to patent EP 0 933 585 makes it possible to obtain a beam of satisfactory range along the optical axis of the projector, with a clean 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 side of the road is relatively delicate.
L'invention a pour but de fournir un projecteur destiné à équiper des véhicules, qui, tout en conservant les avantages procurés par un projecteur à réflecteur verticalisé, permet d'obtenir de meilleures performances optiques, notamment d'obtenir de manière simple et efficace une grande largeur de faisceau pour éclairer les bas-côtés. L'invention, subsidiairement, cherche à obtenir un projecteur de type verticalisé qui puisse être de dimensions compactes, notamment en ce qui concerne sa profondeur. The object of the invention is to provide a projector intended to equip which, while retaining the benefits of a verticalized reflector, allows to obtain better optical performances, in particular to obtain in a simple and effective way a large width of beam to illuminate the aisles. The invention, in the alternative, seeks to get a vertical type projector that can be of dimensions compact, especially with regard to its depth.
Selon l'invention, un projecteur pour véhicule automobile du genre défini précédemment est caractérisé par le fait que :
- une source lumineuse (S) est placée au voisinage du foyer interne (Fi) d'un réflecteur ellipsoïdal (R1), de façon à ce que l'axe de la source soit parallèle à ou oblique par rapport à l'axe optique (YY) du réflecteur ellipsoïdal (R1) ;
- la paroi du réflecteur ellipsoïdal (R1) 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 (R1),
- 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 lumineux qui n'est substantiellement pas intercepté par la lentille, le réflecteur ellipsoïdal (R1) donnant un faisceau venant s'additionner à celui produit par le réflecteur verticalisé (R2) pour constituer le faisceau complet produit par le projecteur.
- a light source (S) is placed in the vicinity of the internal focus (Fi) of an ellipsoidal reflector (R1), so that the axis of the source is parallel to or oblique with respect to the optical axis (YY ) of the ellipsoidal reflector (R1);
- the wall of the ellipsoidal reflector (R1) comprises a notch (1) situated 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 (R1) ,
- 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 notch (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 light beam which is substantially not intercepted by the lens, the ellipsoidal reflector (R1) giving a beam coming to add to that produced by the verticalized reflector (R2) to constitute the complete beam produced by the projector.
On comprend par « source » le filament de la lampe quand il s'agit d'une lampe à filament type lampe halogène.We understand by "source" the filament of the lamp when it comes to a filament lamp type halogen lamp.
L'invention a ainsi conçu un dispositif d'éclairage pour véhicule qui associe deux types de réflecteur : un réflecteur ellipsoïdal associé à une lentille du type de celles que l'on trouve, par exemple, dans les modules elliptiques, et un réflecteur verticalisé, partageant de préférence la même focale. Le réflecteur ellipsoïdal va plutôt contribuer au faisceau global dans la définition de sa largeur, tandis que le réflecteur verticalisé va être utilisé davantage pour définir la portée et éventuellement la coupure du faisceau global. Le fait que l'on puisse orienter de différentes façons la source lumineuse par rapport à l'axe optique du réflecteur ellipsoïdal, surtout en pouvant conserver les mêmes définitions de surface des réflecteurs est tout à fait novateur et avantageux , et permet plus de souplesse : un projecteur qui devra être peu profond pourra adopter une configuration où la lampe est d'orientation oblique, tandis qu'une photométrie particulière pourra n'être obtenue, par exemple, qu'avec une orientation de la source parallèle ou substantiellement parallèle à l'axe optique. Une orientation parallèle permet généralement d'obtenir un faisceau plus large, toutes choses égales par ailleurs, qu'avec une orientation oblique de la source. On peut noter incidemment qu'une orientation de la source parallèle à l'axe optique présente en plus l'intérêt d'un montage identique de la source lumineuse entre le projecteur droit et le projecteur gauche d'un même véhicule.The invention thus devised a vehicle lighting device which combines two types of reflectors: an ellipsoidal reflector associated with a lens of the type found, for example, in elliptical modules, and a verticalized reflector, preferably sharing the same focal length. The reflector ellipsoidal will rather contribute to the overall beam in the definition of its width, while the verticalized reflector will be used more to define the scope and possibly the cutoff of the overall beam. The fact that we can orient different ways the light source with respect to the optical axis of the ellipsoidal reflector, especially by being able to retain the same definitions of reflector surface is quite innovative and advantageous, and allows more flexibility: a shallow projector will be able to adopt a configuration where the lamp is obliquely oriented, while a photometry particular may be obtained, for example, only with an orientation of the source parallel or substantially parallel to the optical axis. An orientation parallel usually helps to get a wider beam, all things equal, only with an oblique orientation of the source. We can note incidentally that an orientation of the source parallel to the optical axis present in plus the interest of identical mounting of the light source between the projector right and the left projector of the same vehicle.
Avantageusement, le faisceau produit par le réflecteur ellipsoïdal (R1) contribue à définir la largeur du faisceau complet. De même, de préférence, le faisceau produit par le réflecteur verticalisé (R2) contribue à définir la portée, et éventuellement la coupure, du faisceau complet.Advantageously, the beam produced by the ellipsoidal reflector (R1) helps define the width of the entire beam. Likewise, preferably, the beam produced by the verticalized reflector (R2) helps define the range, and possibly the cut, the complete beam.
Avantageusement, l'axe de la source lumineuse (S) est disposé dans un plan substantiellement horizontal. De préférence, celui-ci fait un angle α compris entre 0 et 80°, par exemple entre 0° et 70°, notamment entre 0 et 50° ou entre 0 et 45 ° avec l'axe optique (YY) du réflecteur ellipsoïdal (R1).Advantageously, the axis of the light source (S) is arranged in a substantially horizontal plane. Preferably, this is an angle α understood between 0 and 80 °, for example between 0 ° and 70 °, in particular between 0 and 50 ° or between 0 and 45 ° with the optical axis (YY) of the ellipsoidal reflector (R1).
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 finding in the vicinity of the light source. The verticalized reflector can have ridges delimiting at least one central facet and two facets sideways inclined towards each other.
De préférence, le faisceau produit par le réflecteur verticalisé a un
angle d'ouverture au plus égal à ± 15° 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.
Généralement le plan passant par l'axe de la source lumineuse (S) est
substantiellement horizontal, le réflecteur ellipsoïdal (R1) étant situé au-dessus
de ce plan et le réflecteur verticalisé (R2) étant situé au-dessous de ce plan.Preferably, the beam produced by the verticalized reflector has an opening angle at most equal to ± 15 ° on either side of the optical axis. The beam produced by the ellipsoidal reflector has an opening angle of about ± 40 ° on either side of the optical axis.
Generally the plane passing through the axis of the light source (S) is substantially horizontal, the ellipsoidal reflector (R1) being located above this plane and the verticalized reflector (R2) being located below this plane.
Le projecteur de l'invention peut être un projecteur de croisement (ou code) 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.The projector of the invention may be a dipped beam (or code) for a motor vehicle, in which case the ellipsoidal reflector has a cache located in the vicinity of the external focus so that the outgoing beam is essentially below a certain level, while the reflector vertically is intended to create a V-shaped cut corresponding to that of a passing beam.
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 entre 0 et 2 mm en dessous, notamment entre 0,5 et 1,8 mm ou entre 0,7 et 1,7 mm en dessous, par exemple à environ 1,5 mm au-dessous. Le choix de cette cote dépend de la définition du miroir ellipsoïdal. Cette disposition du cache est avantageuse, car elle permet de récupérer une portion non gênante de flux lumineux supplémentaire.The cover can be located at the focus or behind the reflector focus ellipsoidal. Preferably the upper edge of the cache is located below the horizontal plane passing through the optical axis of the reflector, in particular between 0 and 2 mm below, in particular between 0.5 and 1.8 mm or between 0.7 and 1.7 mm in below, for example about 1.5 mm below. The choice of this rating depends on the definition of the ellipsoidal mirror. This cache layout is advantageous, because it makes it possible to recover a non-annoying portion of flows extra light.
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. Le cache peut aussi avoir d'autres définitions géométriques, par exemple être plan. Le choix de sa forme peut dépendre du chromatisme de la lentille associée au miroir ellipsoïdal.The cover can be constituted by a portion of a cylinder with generators vertically, turning its concavity forward, according to the curvature of the field of ellipsoidal reflector. The cache can also have other geometric definitions, for example, be plane. The choice of its shape may depend on the chromaticism of the lens associated with the ellipsoidal mirror.
Le rayon de la portion de cylindre peut ainsi varier d'une valeur R=x, égal par exemple à 15 ou 30 mm, à R= infini suivant la courbure de champ.The radius of the cylinder portion can thus vary by a value R = x, equal for example to 15 or 30 mm, at R = infinite following the curvature of field.
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 offset with respect 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 au même niveau que le bord supérieur du cache lorsqu'il est présent, et par exemple à environ 0,5 à 2 mm en arrière, par exemple 1,5 mm en arrière du foyer externe du réflecteur ellipsoïdal. Cette distance peut dépendre, notamment, de la focale de la lentille et de la définition de l'ellipsoïde. (La lentille peut se trouver également exactement au niveau du foyer externe). Cette configuration de la lentille en arrière du foyer externe permet d'optimiser la récupération du flux lumineux maximal au dessus de la coupure quand il y a un cache.The lens can be arranged so that its focus is in back, especially at the same level as the top edge of the cache when it is present, and for example about 0.5 to 2 mm back, for example 1.5 mm in rear of the outer focus of the ellipsoidal reflector. This distance may depend, in particular, the focal length of the lens and the definition of the ellipsoid. (The lens can also be exactly at the level of the external focus). This configuration of the lens behind the external focus optimizes the recovery of the maximum luminous flux over the cutoff when there is a hidden.
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 (ou lampe xénon).Alternatively, the ellipsoidal reflector may be located below the plane horizontally 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 of this plan. This arrangement is advantageous in the case where the light source is a discharge lamp (or xenon lamp).
L'invention sera décrite ci-après à l'aide d'exemples non limitatifs
illustrés par les figures suivantes :
En se reportant aux figures 1 à 3, on peut voir un projecteur lumineux P pour véhicule automobile comportant une source S, dont l'axe géométrique est dans un plan substantiellement horizontal et dont l'orientation par rapport à l'axe optique Y-Y du projecteur est variable. La figure 1 montre une orientation de la source parallèle à l'axe optique, on parlera alors d'orientation axiale. La figure 2 ne fait que la symboliser sous la forme d'une croix, qui est donc le point où passe le centre du filament . La figure 3 représente l'axe optique YY et l'axe de la source XX, avec deux configurations possibles de la source : celle où l'angle α que font les deux axes est de 0°, et celle où l'angle α que font les deux axes entre eux est de 45°. Bien sûr, toute autre configuration où cet angle α est compris entre 0 et 45 ou 80° est aussi possible. 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 axialement ou obliquement dans le projecteur, tandis que dans le cas d'une lampe normalisée H3 avec filament transversal, cette lampe H3 est montée transversalement ou obliquement dans le projecteur.Referring to FIGS. 1-3, one can see a bright spotlight P for a motor vehicle comprising a source S whose geometric axis is in a substantially horizontal plane and whose orientation with respect to the axis Y-Y optical of the projector is variable. Figure 1 shows an orientation of the source parallel to the optical axis, we will speak of axial orientation. Figure 2 only symbolizes it in the form of a cross, which is the point where the center of the filament. FIG. 3 represents the optical axis YY and the axis of the source XX, with two possible configurations of the source: the one where the angle α what the two axes do is 0 °, and that where the angle α that the two axes make between they are 45 degrees. Of course, any other configuration where this angle α is included between 0 and 45 or 80 ° is also possible. The source S can be constituted by a halogen lamp having a generally cylindrical filament. In the case of a standard lamp H1 or H7 with axial filament, this lamp is mounted axially or obliquely in the projector, while in the case of a lamp standardized H3 with cross filament, this H3 lamp is mounted transversely or obliquely in the projector.
En variante, la source S peut être constituée par une lampe xénon produisant un arc généralement cylindrique et dans l'axe de la lampe : tout se passe alors, au sens de l'invention, comme si on avait affaire à une lampe halogène à filament axial en ce qui concerne l'orientation de la lampe.Alternatively, the source S may be constituted by a xenon lamp producing a generally cylindrical arc and in the axis of the lamp: everything is then, in the sense of the invention, as if we were dealing with a lamp axial filament halogen with regard to the orientation of the lamp.
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 focal point Fi of a reflector ellipsoidal R1. By "ellipsoidal reflector" is meant a reflector whose surface is defined from two homes respectively an internal focus Fi and a focus externally Fe, this surface approximating an ellipsoid without being necessarily exactly an ellipsoid.
La paroi du réflecteur ellipsoïdal R1, dans le cas où l'on utilise une lampe halogène, 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. 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, in the case where one uses a halogen lamp, has a notch 1 on one side of the plane passing through the axis geometric source S and parallel to the optical axis Y-Y. In the example represented, the plane in question is the horizontal plane passing through the axis geometry of the source S. The notch 1 corresponds substantially to a cutting the lower half of the reflector R1 by an oblique plane. The plan of cut is slightly inclined from the left to the right of Fig.1. The notch 1 is bounded by two edges converging towards the rear of the S source. rear ends of the edges of the notch 1 are connected by a segment orthogonal to the Y-Y axis. The notch 1 is intended to let down, on the side opposite 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 coincides with the axis Y-Y optical 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). L'invention s'applique aussi à des lentilles de diamètre
supérieur, de 60 ou 70 mm.A
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
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
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 the internal focus Fi to increase the luminous flux from the ellipsoidal reflector R1.
Dans le cas représenté sur les figures 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 est plan, et présente un profil
correspondant à l'image inversé par rapport à l'horizontale de la coupure
recherchée. Avantageusement, le bord supérieur du cache 5 est situé
au-dessous du plan horizontal passant par Y-Y, à une distance d
d'environ 1 mm. Les dimensions du cache sont au maximum égales à
l'ouverture horizontale de l'ellipsoïde du réflecteur R1.In the case shown in FIGS. 1 to 3, the projector P is provided
to ensure the function code that is to say to provide a passing beam.
To prevent the light beam coming from the reflector R1 from
part located above the horizontal plane passing through the Y-Y axis, a
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 the major part of the ellipsoidal reflector R1. The intersection of this verticalized reflector R2 by a vertical plane passing through the Y-Y axis is constituted by a curve arc next to a parabola with a focus near the focus Internal Fi. In general, the surface of the reflector R2 is determined by such that a light beam such as 6i from source S is reflected 6th in a direction parallel to 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 of several dozens 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 au plus égal à ± 15° 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 constituée par une portion de surface cylindrique dont les génératrices sont horizontales et perpendiculaires au plan de la figure 1, et deux facettes latérales légèrement repliées l'une vers l'autre par rapport à la facette centrale. La facette centrale du réflecteur verticalisé contribue essentiellement à la portée du faisceau, l'une des facettes latérale contribue à élargir le faisceau réfléchi par R2 et l'autre facette latérale contribue à la portée du faisceau.In addition, the verticalized reflector R2 is intended to focus the beam which it reflects in an angle of opening at most equal to ± 15 ° of other of the Y-Y optical axis. The reflector R2 can comprise streaks C1, C2 determining at least three facets, namely a central facet constituted by a portion of cylindrical surface whose generatrices are horizontal and perpendicular to the plane of Figure 1, and two lateral facets slightly folded towards each other with respect to the central facet. The central facet of vertical reflector contributes essentially to the range of the beam, one of the lateral facets helps to widen the beam reflected by R2 and the other facet side contributes to the range of the beam.
Le boítier du projecteur, non représenté, a par exemple un contour rectangulaire, nettement plus haut que large.The housing of the projector, not shown, for example has an outline rectangular, noticeably higher than wide.
Le réflecteur ellipsoïdal R1 produit un faisceau lumineux ayant un angle d'ouverture d'environ ± 40° de part et d'autre de l'axe optique Y-Y.The ellipsoidal reflector R1 produces a light beam having a opening angle of about ± 40 ° on both sides of the Y-Y optical axis.
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 en Europe.In the example considered of a projector P intended to produce a passing beam, the verticalized reflector R2 is intended to establish the line V cut, corresponding to the regulation of codes in Europe.
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 reflector ellipsoidal R1 produces a beam of reduced range but wide, to illuminate the aisles.
Cet exemple se rapporte à une configuration oblique à 45° de la source, qui est une lampe H 7This example refers to a 45 ° oblique configuration of the source, which is a lamp H 7
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 les figures 4 et 5, correspondant respectivement à la portion du faisceau provenant du réflecteur verticalisé R2 et à la portion du faisceau du projecteur provenant du réflecteur ellipsoïdal R1. 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 FIGS. 4 and 5, respectively corresponding to the portion of the beam from the verticalized reflector R2 and the beam portion of the projector from the ellipsoidal reflector R1. The abscissa axis corresponds to the trace on the screen of the horizontal plane passing through the optical axis Y-Y of the projector. The graduations in% (percent) on this axis correspond to the tangent of the angle formed between the optical axis and the straight line passing through the focus of projector and cutting the screen at the level of the graduation. The y-axis corresponds to the trace on the screen of the vertical plane passing through the optical axis Y-Y. The graduations in% (percent) of this vertical axis correspond to the tangent the angle formed between the horizontal plane passing through the optical axis and a straight line which goes through the focus of the projector and cuts off the screen at the point of graduation.
On voit, d'après la figure 4, que les courbes isolux du faisceau produit par le réflecteur verticalisé délimitent la coupure en V spécifique d'un faisceau code. La courbe fermée L1 d'éclairement maximal est située au-dessous du plan horizontal, et est décalée par rapport à l'axe vertical vers la droite, en se trouvant sous la ligne oblique de la coupure. 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 ± 15°.It can be seen from Figure 4 that the isolux curves of the beam produced by the verticalized reflector delimit the specific V cut of a beam code. The closed curve L1 of maximum illumination is located below the plane horizontal, and is offset from the vertical axis to the right, lying under the oblique line of the cut. This curve L1 is surrounded by a sequence closed curves corresponding to increasingly weak illuminations. Some of these curves extend laterally up to ± 15 °.
La courbe isolux L1 correspond, dans l'exemple considéré, à un éclairement de 24 lux. L'éclairement maximal se trouve au centre de cette courbe. Les courbes isolux suivantes correspondent à des éclairements qui diminuent progressivement : 20 lux pour L2, 16 lux pour L3, 12 lux pour L4, 6 lux pour L5, 3.2 lux pour L6.The isolux curve L1 corresponds, in the example under consideration, to a illumination of 24 lux. The maximum illumination is at the center of this curve. The following isolux curves correspond to decreasing illuminations gradually: 20 lux for L2, 16 lux for L3, 12 lux for L4, 6 lux for L5, 3.2 lux for L6.
La figure 5 représente donc la part du faisceau provenant cette fois du réflecteur ellipsoïdal. Les isolux sont nettement plus larges, ce que l'on recherche comme fonction principale du miroir R1. Cela se traduit par un faisceau éclairant les bas côtés et apportant du confort devant le véhicule. La courbe V1 d'éclairement maximal est essentiellement sous l'axe horizontal, et répartie de part et d'autres de l'axe vertical.FIG. 5 thus represents the part of the beam coming from the ellipsoidal reflector. The isolux are much wider, what we are looking for as the main function of the mirror R1. This results in an illuminating beam the low sides and bringing comfort in front of the vehicle. The curve V1 maximum illumination is essentially below the horizontal axis, and distributed part and others of the vertical axis.
Cet exemple se rapporte à une configuration axiale de la source, qui est une lampe H 7.This example relates to an axial configuration of the source, which is a H 7 lamp.
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 les figures 6 et 7, correspondant respectivement à la portion du faisceau provenant du réflecteur verticalisé R2 et à la portion du faisceau du projecteur provenant du réflecteur ellipsoïdal R1. L'isolux maximum selon la figure 7 est substantiellement sous le plan horizontal, et réparti approximativement de façon symétrique par rapport à l'axe vertical. La valeur maximum est à 19,5 lux en ce qui concerne la figure 6..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 FIGS. 6 and 7, respectively corresponding to the portion of the beam from the verticalized reflector R2 and the beam portion of the projector from the ellipsoidal reflector R1. The maximum isolux according to the Figure 7 is substantially below the horizontal plane, and distributed approximately symmetrically with respect to the vertical axis. The value maximum is 19.5 lux with regard to Figure 6 ..
Les figures 8 et 9 illustrent la photométrie des faisceaux globaux selon les exemples 1 et 2. Le flux total selon l'exemple 1 en orientation axiale de la source (figure 8) est de 434,95 lumen. Il est de 352,16 lumens dans le cas de l'exemple 2 en orientation oblique de la source (figure 9). L'avantage commun à ces deux exemples est que, quelle que soit l'orientation, de la source, on obtient un V de coupure net, satisfaisant, avec le miroir R2, et avec un flux lumineux suffisant. On remarque aussi le flux augmente quand l'angle α passe de 45 à 0°. Une orientation axiale de la source présente donc l'avantage supplémentaire d'un flux plus important qu'en orientation oblique : le gain de flux est non négligeable (environ 25%).Figures 8 and 9 illustrate the photometry of the global beams according to the Examples 1 and 2. The total flow according to Example 1 in axial orientation of the source (Figure 8) is 434.95 lumen. It is 352.16 lumens in the case of the example 2 in oblique orientation of the source (Figure 9). The common advantage to these two examples is that, whatever the orientation, the source, we get a V of clean cut, satisfactory, with the mirror R2, and with a sufficient luminous flux. We note also the flux increases when the angle α goes from 45 to 0 °. A Axial orientation of the source thus has the added benefit of a stream more important than in oblique orientation: the gain of flow is not negligible (about 25%).
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 foregoing description, the ellipsoidal reflector R1 is located mainly above the horizontal plane passing through the Y-Y optical axis of the projector, 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 xenon.An inverse arrangement is possible, that is to say with the reflector verticalized R2 above the horizontal plane passing through the Y-Y axis and with the ellipsoid reflector R1 for the most part below this plane. The cut the reflector R1 would then be above the horizontal plane passing through Y-Y. For such an inverted arrangement, the reflective surfaces are recalculated to provide the desired beams. Such an inverted disposition particularly suitable for a light source S constituted by a lamp xenon.
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 est supprimé,
et les surfaces du miroir R2 sont recalculées de façon à centrer l'isolux maximum
sur le point (0,0) de la courbe d'isolux, point appelé également point HV.The invention applies not only to a crossover projector P
such as the one described, but also to other types of projectors,
including a road searchlight. In the latter case, the
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 makes it possible, in the case of a
crossing headlamp with 5 cover, better flow performance compared
to a projector with a single full ellipsoidal reflector. The gain in flow is
the order of 25% because the light beam produced by the verticalized reflector R2
is not decreased by
Avec un réflecteur verticalisé classique seul de dimensions équivalentes, 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 du faisceau. L'invention permet d'adapter un projecteur selon l'invention dont les surfaces optiques des réflecteurs sont figées, en fonction de contraintes dimensionnelles ou photométriques, en ajustant de façon appropriée l'orientation de la lampe par rapport à l'axe optique, ce qui est simple, surprenant et efficace.With a classic verticalized reflector only of dimensions equivalent, it was relatively difficult to ensure beam width and it was had to use reflections on the cheeks of the mirror. These difficulties disappear with the solution of the invention since the ellipsoidal reflector R1 ensures spreading the beam. The invention makes it possible to adapt a projector according to the invention, the optical surfaces of the reflectors of which are fixed, as a function of dimensional or photometric constraints, adjusting appropriately the orientation of the lamp with respect to the optical axis, which is simple, surprising and effective.
Claims (17)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL04292799T PL1538393T3 (en) | 2003-12-05 | 2004-11-26 | Vehicle headlight with vertical orientation |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0314320A FR2863342B1 (en) | 2003-12-05 | 2003-12-05 | VERTICALIZED PROJECTOR FOR MOTOR VEHICLE |
FR0314320 | 2003-12-05 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1538393A1 true EP1538393A1 (en) | 2005-06-08 |
EP1538393B1 EP1538393B1 (en) | 2007-06-13 |
Family
ID=34451733
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04292799A Not-in-force EP1538393B1 (en) | 2003-12-05 | 2004-11-26 | Vehicle headlight with vertical orientation |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1538393B1 (en) |
AT (1) | ATE364817T1 (en) |
DE (1) | DE602004006945T2 (en) |
ES (1) | ES2289456T3 (en) |
FR (1) | FR2863342B1 (en) |
PL (1) | PL1538393T3 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007031253B4 (en) * | 2007-07-04 | 2013-03-28 | Automotive Lighting Reutlingen Gmbh | Compact ellipsoid headlight |
DE102017113728A1 (en) * | 2017-06-21 | 2018-12-27 | Automotive Lighting Reutlingen Gmbh | Motor vehicle headlamps |
Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4772987A (en) * | 1985-07-13 | 1988-09-20 | Robert Bosch Gmbh | Headlight for antifog lamp for automotive vehicles |
FR2637046A1 (en) * | 1988-09-27 | 1990-03-30 | Koito Mfg Co Ltd | VEHICLE LIGHTHOUSE |
US5117336A (en) * | 1989-09-14 | 1992-05-26 | Hella Kg Hueck & Co. | Working spotlight, particularly for motor vehicles |
EP0933585A1 (en) * | 1998-01-28 | 1999-08-04 | Valeo Vision | Vehicle headlight comprising a transversal source and able to generate a sharp dark-light cut-off |
US6059435A (en) * | 1997-12-18 | 2000-05-09 | Robert Bosch Gmbh | Headlight of a vehicle for high beam light and low beam light |
FR2787864A1 (en) * | 1998-12-29 | 2000-06-30 | Bosch Gmbh Robert | SPOTLIGHT FOR MITIGATION OF THE LIGHTING OF THE AREA NEAR THE FRONT OF THE VEHICLE |
JP2001014908A (en) * | 1999-06-28 | 2001-01-19 | Stanley Electric Co Ltd | Projector type headlight |
EP1126210A2 (en) * | 2000-02-18 | 2001-08-22 | Stanley Electric Co., Ltd. | Head lamp for vehicle |
US20010019483A1 (en) * | 2000-01-12 | 2001-09-06 | Kenichi Takada | Vehicular headlamp |
EP1219887A2 (en) * | 2000-12-25 | 2002-07-03 | Stanley Electric Co., Ltd. | Vehicle light capable of changing light distribution pattern between low-beam mode and high-beam mode by a movable shade and a reflecting surface |
FR2823833A1 (en) * | 2001-04-24 | 2002-10-25 | Koito Mfg Co Ltd | Automobile headlamp unit has auxiliary reflectors above and below optical axis between rear reflector and front projection lens |
EP1286106A1 (en) * | 2001-08-14 | 2003-02-26 | Stanley Electric Co., Ltd. | Vehicle headlight |
EP1433999A1 (en) * | 2002-12-24 | 2004-06-30 | Valeo Vision | Motor vehicle headlamp with a transverse light source |
-
2003
- 2003-12-05 FR FR0314320A patent/FR2863342B1/en not_active Expired - Fee Related
-
2004
- 2004-11-26 EP EP04292799A patent/EP1538393B1/en not_active Not-in-force
- 2004-11-26 ES ES04292799T patent/ES2289456T3/en active Active
- 2004-11-26 DE DE602004006945T patent/DE602004006945T2/en active Active
- 2004-11-26 AT AT04292799T patent/ATE364817T1/en not_active IP Right Cessation
- 2004-11-26 PL PL04292799T patent/PL1538393T3/en unknown
Patent Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4772987A (en) * | 1985-07-13 | 1988-09-20 | Robert Bosch Gmbh | Headlight for antifog lamp for automotive vehicles |
FR2637046A1 (en) * | 1988-09-27 | 1990-03-30 | Koito Mfg Co Ltd | VEHICLE LIGHTHOUSE |
US5117336A (en) * | 1989-09-14 | 1992-05-26 | Hella Kg Hueck & Co. | Working spotlight, particularly for motor vehicles |
US6059435A (en) * | 1997-12-18 | 2000-05-09 | Robert Bosch Gmbh | Headlight of a vehicle for high beam light and low beam light |
EP0933585A1 (en) * | 1998-01-28 | 1999-08-04 | Valeo Vision | Vehicle headlight comprising a transversal source and able to generate a sharp dark-light cut-off |
FR2787864A1 (en) * | 1998-12-29 | 2000-06-30 | Bosch Gmbh Robert | SPOTLIGHT FOR MITIGATION OF THE LIGHTING OF THE AREA NEAR THE FRONT OF THE VEHICLE |
JP2001014908A (en) * | 1999-06-28 | 2001-01-19 | Stanley Electric Co Ltd | Projector type headlight |
US20010019483A1 (en) * | 2000-01-12 | 2001-09-06 | Kenichi Takada | Vehicular headlamp |
EP1126210A2 (en) * | 2000-02-18 | 2001-08-22 | Stanley Electric Co., Ltd. | Head lamp for vehicle |
EP1219887A2 (en) * | 2000-12-25 | 2002-07-03 | Stanley Electric Co., Ltd. | Vehicle light capable of changing light distribution pattern between low-beam mode and high-beam mode by a movable shade and a reflecting surface |
FR2823833A1 (en) * | 2001-04-24 | 2002-10-25 | Koito Mfg Co Ltd | Automobile headlamp unit has auxiliary reflectors above and below optical axis between rear reflector and front projection lens |
EP1286106A1 (en) * | 2001-08-14 | 2003-02-26 | Stanley Electric Co., Ltd. | Vehicle headlight |
EP1433999A1 (en) * | 2002-12-24 | 2004-06-30 | Valeo Vision | Motor vehicle headlamp with a transverse light source |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 16 8 May 2001 (2001-05-08) * |
Also Published As
Publication number | Publication date |
---|---|
DE602004006945T2 (en) | 2008-02-21 |
FR2863342A1 (en) | 2005-06-10 |
EP1538393B1 (en) | 2007-06-13 |
ES2289456T3 (en) | 2008-02-01 |
DE602004006945D1 (en) | 2007-07-26 |
ATE364817T1 (en) | 2007-07-15 |
PL1538393T3 (en) | 2007-11-30 |
FR2863342B1 (en) | 2007-01-05 |
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