EP1731829A1 - Vehicle projector - Google Patents
Vehicle projector Download PDFInfo
- Publication number
- EP1731829A1 EP1731829A1 EP06290837A EP06290837A EP1731829A1 EP 1731829 A1 EP1731829 A1 EP 1731829A1 EP 06290837 A EP06290837 A EP 06290837A EP 06290837 A EP06290837 A EP 06290837A EP 1731829 A1 EP1731829 A1 EP 1731829A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mirror
- projector
- reflecting mirror
- focus
- reflecting
- 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
- F21S41/365—Combinations of two or more separate reflectors successively reflecting the light
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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
- F21S41/10—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
- F21S41/162—Incandescent light sources, e.g. filament or halogen lamps
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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
- F21S41/10—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
- F21S41/172—High-intensity discharge light sources
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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
- F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
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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
- F21S41/40—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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
- F21W2102/30—Fog lights
Definitions
- a projector of this type uses a lens in addition to the first reflecting mirror and gives rise to two light beams.
- the cut is generated by a cache, which has the effect of reducing the performance of the projector.
- elliptical projectors are known that provide a cut-off beam with good efficiency.
- the depth of such elliptical projectors that is to say their dimension along the optical axis, is relatively important.
- the invention aims, above all, to provide a projector that allows the use of any type of lamp, including discharge lamp, while having a shallow depth and efficiency at least equal to an elliptical projector.
- the two reflecting mirrors can be planes, this is their simplest embodiment. Alternatively, they may also, or at least one of them, have one or more appropriate curvatures.
- the deflection mirror adjacent to the folder, if it is curved, can improve the distribution of the luminous flux on the other deflection mirror, in order to limit any risk of aberrations and possibly to correct defects in the light beam obtained at the of the cut.
- the folder is preferably defined by planar surfaces, according to its simplest embodiment. Alternatively, it may also present at least one curvature. This latter configuration may be advantageous for improving its efficiency or for reducing possible problems of inhomogeneity in the light beam obtained.
- the projector comprises the optical module thus defined, and, by extension, the entire lighting and / or signaling device, suitable for equipping a vehicle, of the projector type, and optionally comprising other optical modules, other light sources associated with other reflectors.
- the wall of the collector mirror in its half located on the side of the first reflecting mirror, may comprise a recess extending from the front edge of the collector mirror.
- the first deflection mirror, the second deflection mirror and the folder can be made in one piece.
- the light source may be a xenon lamp, also known as a discharge lamp.
- the first mirror may have a parabolic or complex surface.
- the surface of the first reflecting mirror may include ridges.
- the concavities of the collector mirror and the first deflection mirror can be oriented in the same direction, forwards or be substantially opposite.
- the folder can be formed of two planes.
- the two planes can form an angle equal to 15 °.
- the invention also relates to the vehicle on which is mounted at least one of the projectors described above.
- a projector P according to the invention comprises a collector mirror 1 of ellipsoidal type having an optical axis 2.
- the projector P is intended to be installed on a motor vehicle (not shown), the concavity of the collector mirror 1 being oriented towards the front of the vehicle.
- the terms “front, rear”, “vertical”, “horizontal”, “upper” or “lower” refer to the position of the projector P once set up on a motor vehicle.
- an orifice 1a is arranged to insert a light source 3.
- this light source 3 is arranged so that a maximum emission point of light is confused with the internal focus Fi of the collector 1.
- a first reflecting mirror 4 offset vertically with respect to the collector mirror 1, is placed below this collecting mirror 1.
- the reflecting surface of the first reflecting mirror 4 is oriented forward.
- the first reflecting mirror 4 comprises a focus Fr1 and an optical axis 4a.
- the first reflecting mirror 4 has a parabolic surface.
- the optical axes 2 and 4a of the collector mirror 1 and the first reflecting mirror 4 are in a same substantially vertical plane. They form between them an angle ⁇ . When the projector is installed on the vehicle, the optical axis 4a of the reflecting mirror 4 is horizontal.
- a second reflecting mirror 5, plane and whose reflective surface is oriented towards the inside of the collector mirror 1, is arranged perpendicularly to the plane containing the optical axes 2 and 4a and is inclined relative to the optical axis 2 of the collector.
- the upper edge 5a of the second reflecting mirror 5 is in contact with the upper edge 1b of the collector mirror 1.
- this mirror can alternatively have a curvature, not be plane.
- the second reflecting mirror 5 and the first reflecting mirror 4 are positioned in such a way that the focus Fr1 of the first reflecting mirror 4 is coincident with, or close to, the image of the external focus Fe of the collector 1 given by the second reflecting mirror 5.
- the projector P further comprises a folder 6 consisting of a plane mirror whose reflective surface is oriented towards the inside of the collector mirror 1.
- the folder 6 is disposed perpendicularly to the plane containing the optical axes 2 and 4a. Its upper edge 6a is adjacent to the lower edge 5b of the second reflecting mirror.
- the lower edge 6b of the folder 6 is located in the vicinity of the focus Fr1 of the first reflecting mirror 4 and its image, given by the first reflecting mirror 4, defines the cutoff of the light beam emitted by the projector P.
- the folder can also be curved, not be flat.
- the lower part of the wall of the collector mirror 1 has a notch 7 which extends from the front edge of the collector mirror 1 inwards in a curved contour. This notch, advantageous but optional, increases the amount of light falling on the mirror 4.
- the light source 3 is advantageously a discharge lamp 8.
- the axis of the discharge lamp 8 is substantially coincidental with the optical axis 2. Typically, approximately two-thirds of the flow of the discharge lamp 8 are emitted towards the half upper of the collector mirror 1, the remaining third being emitted towards the lower half of the collector mirror 1.
- Such an arrangement provides a small footprint, especially in depth.
- a depth D (FIG. 1) of less than 115 mm, for a height H of 127 mm and a width L (FIG. .2) 60 mm.
- the operation of the projector is as follows.
- a ray i1 emitted from the internal focal point Fi is reflected along a radius j1 by the collector mirror 1 towards the external focus Fe.
- the ray j1 undergoes on the second reflecting mirror 5 a reflection at a point Q1 to give the ray k1 .
- This radius k1 tangentially crosses the lower edge 6b of the folder 6.
- the radius k1 falls on the first reflecting mirror 4 at a point S1 where it is reflected along the radius r1 towards the front of the vehicle, parallel to the optical axis 4a.
- a ray i2 emitted by a point of the source situated in front of the internal focal point Fi is reflected along a radius j2 by the collector mirror 1.
- the ray j2 reaches the second deflection mirror 5 at a point Q2 situated lower than Q1 and is reflected along the radius k2, which falls on the folder 6 in R2 and is reflected in a radius I2.
- This radius I2 falls at S2 on the mirror 4 and is reflected along a radius r2, falling with respect to r1.
- a ray i3 emitted by a point of the source behind the internal focus Fi is reflected along a radius j3 by the collector mirror 1.
- the ray j3 falls on the second reflecting mirror 5 at a point Q3 situated higher than Q1 and is reflected on a radius k3.
- the radius k3 passes between the lower end of the reflecting mirror 1 and the lower edge 6b of the folder 6.
- the radius k3 falls on the first reflecting mirror 4 at a point S3 where it is reflected along a radius r3 that is descending from the radius r1.
- a light beam is obtained with a cut defined by the image, given by the mirror 4, of the lower edge 6b of the folder 6.
- the general shape of the beam obtained is illustrated in FIG. 4 using isocandela curves. It can be seen that the illumination is almost zero above the horizontal plane passing through the optical axis of the first reflecting mirror 4. The illuminated area is located below the horizontal plane and has a substantially pentagonal contour.
- the first reflecting mirror 4, the second reflecting mirror 5 and the folder 6 in one piece, in particular made of molded plastic, with a reflective metal deposit for the mirror surfaces.
- the shape of the collector mirror can be optimized to control the distribution of the luminous flux. In the same way, it is possible to modify the shape of the second reflecting mirror so as to obtain a second possibility of controlling the light beam.
- the first reflecting mirror may have a complex surface, ie a surface of parabolic appearance, but more complex according to imposed conditions. It can also include streaks determining several facets.
- the concavities of the collecting mirror and the first reflecting mirror are oriented in the same direction, forward, and the collecting mirror is located above the first reflecting mirror.
- the folder from two planes forming, for example, an angle of 15 °.
- the line segment representing the folder in FIG. 1 is the intersection of these two planes.
- the first mirror is of parabolic shape, it is preferable to modify the lower edge of the folder so as to compensate for the aberrations appearing when one moves away from the axis of the ellipsoid.
- the first reflecting mirror comprises a complex surface
- the area in front of the second mirror 5 and in front of the folder 6 can be used to install additional functions such as direction indicators.
- cut-off beam can thus be obtained, in particular with flat cutoff (fog type), or cut at least partially oblique (right-hand traffic code type or left-hand traffic type code, of the European or American type).
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- Engineering & Computer Science (AREA)
- 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 prévu pour donner un faisceau lumineux à coupure, du genre de ceux qui comportent :
- un miroir collecteur, de préférence de type ellipsoïdal,
- une source lumineuse placée au voisinage du foyer interne du collecteur,
- un premier miroir de renvoi, présentant un axe optique et comportant un foyer, décalé verticalement par rapport au collecteur de manière à récupérer une partie du faisceau émis par la source et la renvoyer vers l'avant.
- a collector mirror, preferably of ellipsoidal type,
- a light source placed in the vicinity of the internal focus of the collector,
- a first reflecting mirror, having an optical axis and having a focus, offset vertically relative to the collector so as to recover a portion of the beam emitted by the source and return it to the front.
Un projecteur de ce type, décrit dans
L'utilisation de dispositifs du type « plieuse » a l'avantage de réduire les pertes de lumière par rapport à un projecteur utilisant un cache. Toutefois les solutions à plieuse ne peuvent pas exploiter la lumière provenant du bas du collecteur.The use of "folding" type devices has the advantage of reducing the loss of light compared to a projector using a cache. However, bending solutions can not exploit light from the bottom of the collector.
On connaît, par ailleurs, des projecteurs elliptiques donnant un faisceau à coupure avec un bon rendement. Toutefois la profondeur de tels projecteurs elliptiques, c'est-à-dire leur dimension suivant l'axe optique, est relativement importante.In addition, elliptical projectors are known that provide a cut-off beam with good efficiency. However, the depth of such elliptical projectors, that is to say their dimension along the optical axis, is relatively important.
L'invention a pour but, surtout, de fournir un projecteur qui permet l'utilisation de tout type de lampe, notamment lampe à décharge, tout en ayant une faible profondeur et une efficacité au moins égale à un projecteur elliptique.The invention aims, above all, to provide a projector that allows the use of any type of lamp, including discharge lamp, while having a shallow depth and efficiency at least equal to an elliptical projector.
Selon l'invention, un projecteur pour véhicule automobile du genre défini précédemment comporte :
- un deuxième miroir de renvoi, de préférence majoritairement ou essentiellement plan, dont la surface réfléchissante est orientée vers l'intérieur du miroir collecteur et est inclinée de telle manière que le deuxième miroir de renvoi dirige les rayons lumineux, en provenance du miroir collecteur, vers le premier miroir de renvoi, lequel est disposé de telle sorte que son foyer soit confondu avec, ou voisin de, l'image du foyer externe du miroir collecteur donnée par le deuxième miroir de renvoi,
- une plieuse, de préférence majoritairement, essentiellement ou sensiblement plane, dont la surface réfléchissante est orientée vers l'intérieur du miroir collecteur et qui présente un bord, situé au voisinage du foyer du premier miroir de renvoi, dont l'image définit la coupure du faisceau.
- a second reflecting mirror, preferably predominantly or substantially planar, whose reflecting surface is oriented towards the inside of the collecting mirror and is inclined in such a way that the second reflecting mirror directs the light rays, coming from the collecting mirror, towards the the first reflecting mirror, which is arranged in such a way that its focus is coincident with, or adjacent to, the image of the external focus of the collecting mirror given by the second reflecting mirror,
- a folder, preferably predominantly, substantially or substantially flat, whose reflective surface is oriented towards the inside of the collector mirror and which has an edge, located in the vicinity of the focus of the first reflecting mirror, the image of which defines the cutoff of the beam.
Les deux miroirs de renvoi, ou au moins l'un d'entre eux, peuvent être plans, c'est leur mode de réalisation le plus simple. Alternativement, ils peuvent aussi, ou au moins l'un d'entre eux, présenter une ou plusieurs courbures appropriées. Le miroir de renvoi adjacent à la plieuse, s'il est courbe, peut améliorer la répartition du flux lumineux sur l'autre miroir de renvoi, afin de limiter tout risque d'aberrations et de corriger éventuellement des défauts du faisceau lumineux obtenu au niveau de la coupure.The two reflecting mirrors, or at least one of them, can be planes, this is their simplest embodiment. Alternatively, they may also, or at least one of them, have one or more appropriate curvatures. The deflection mirror adjacent to the folder, if it is curved, can improve the distribution of the luminous flux on the other deflection mirror, in order to limit any risk of aberrations and possibly to correct defects in the light beam obtained at the of the cut.
De même, la plieuse est de préférence définie par des surfaces planes, selon son mode de réalisation le plus simple. Alternativement, elle peut présenter elle aussi au moins une courbure. Cette dernière configuration peut s'avérer avantageuse pour améliorer son efficacité ou pour diminuer d'éventuels problèmes d'inhomogénéité dans le faisceau lumineux obtenu.Similarly, the folder is preferably defined by planar surfaces, according to its simplest embodiment. Alternatively, it may also present at least one curvature. This latter configuration may be advantageous for improving its efficiency or for reducing possible problems of inhomogeneity in the light beam obtained.
On comprend par projecteur le module optique ainsi défini, et, par extension, le dispositif d'éclairage et/ou de signalisation tout entier, apte à équiper un véhicule, du type projecteur, et comprenant éventuellement d'autres modules optiques, d'autre sources lumineuses associées à d'autres réflecteurs.The projector comprises the optical module thus defined, and, by extension, the entire lighting and / or signaling device, suitable for equipping a vehicle, of the projector type, and optionally comprising other optical modules, other light sources associated with other reflectors.
La paroi du miroir collecteur, dans sa moitié située du côté du premier miroir de renvoi, peut comporter une échancrure s'étendant à partir du bord avant du miroir collecteur.The wall of the collector mirror, in its half located on the side of the first reflecting mirror, may comprise a recess extending from the front edge of the collector mirror.
Le premier miroir de renvoi, le deuxième miroir de renvoi et la plieuse peuvent être réalisés d'une seule pièce. La source lumineuse peut être une lampe xénon, dite également lampe à décharge.The first deflection mirror, the second deflection mirror and the folder can be made in one piece. The light source may be a xenon lamp, also known as a discharge lamp.
Le premier miroir de renvoi peut présenter une surface parabolique ou complexe. La surface du premier miroir de renvoi peut comporter des stries.The first mirror may have a parabolic or complex surface. The surface of the first reflecting mirror may include ridges.
Les concavités du miroir collecteur et du premier miroir de renvoi peuvent être orientées dans le même sens, vers l'avant ou bien être sensiblement opposées.The concavities of the collector mirror and the first deflection mirror can be oriented in the same direction, forwards or be substantially opposite.
La plieuse peut être formée de deux plans. Les deux plans peuvent former un angle égal à 15°.The folder can be formed of two planes. The two planes can form an angle equal to 15 °.
L'invention concerne aussi le véhicule sur lequel est monté au moins l'un des projecteurs décrits plus haut.The invention also relates to the vehicle on which is mounted at least one of the projectors described above.
D'autres caractéristiques et avantages de l'invention apparaîtront dans la description qui suit avec référence aux dessins annexés mais qui n'a aucun caractère limitatif. Sur ces dessins :
- Fig. 1 est une coupe schématique suivant la ligne I-I de Fig. 2, d'un projecteur selon l'invention.
- Fig. 2 est une vue schématique de face du projecteur de Fig. 1 sans son boîtier.
- Fig. 3 est une vue schématique en perspective du projecteur de Fig.1 sans son boîtier, et
- Fig. 4 est un diagramme représentant la distribution du flux lumineux d'un projecteur selon l'invention.
- Fig. 1 is a schematic section along the line II of FIG. 2, a projector according to the invention.
- Fig. 2 is a schematic front view of the projector of FIG. 1 without its case.
- Fig. 3 is a schematic perspective view of the projector of Fig.1 without its housing, and
- Fig. 4 is a diagram showing the distribution of the luminous flux of a projector according to the invention.
En se référant aux Fig. 1, 2 et 3, on peut voir qu'un projecteur P selon l'invention comporte un miroir collecteur 1 de type ellipsoïdal présentant un axe optique 2.Referring to FIGS. 1, 2 and 3, it can be seen that a projector P according to the invention comprises a
Le projecteur P est destiné à être installé sur un véhicule automobile (non représenté), la concavité du miroir collecteur 1 étant orientée vers l'avant du véhicule. Lors de la description des différents éléments composant le projecteur P, les termes « avant, arrière », « vertical », « horizontal », « supérieur » ou « inférieur » font référence à la position du projecteur P une fois mis en place sur un véhicule automobile.The projector P is intended to be installed on a motor vehicle (not shown), the concavity of the
Au niveau de l'intersection entre l'axe optique 2 et la surface du miroir collecteur 1, un orifice 1a est aménagé permettant d'insérer une source lumineuse 3. Généralement cette source lumineuse 3 est disposée de manière qu'un point à émission maximum de lumière soit confondu avec le foyer interne Fi du collecteur 1.At the intersection between the
Un premier miroir de renvoi 4, décalé verticalement par rapport au miroir collecteur 1, est placé au-dessous de ce miroir collecteur 1. La surface réfléchissante du premier miroir de renvoi 4 est orientée vers l'avant. Le premier miroir de renvoi 4 comporte un foyer Fr1 et un axe optique 4a. Le premier miroir de renvoi 4 présente une surface parabolique.A first reflecting
Les axes optiques 2 et 4a du miroir collecteur 1 et du premier miroir de renvoi 4 se trouvent dans un même plan sensiblement vertical. Ils forment entre eux un angle γ. Lorsque le projecteur est installé sur le véhicule, l'axe optique 4a du miroir de renvoi 4 est horizontal.The
Un deuxième miroir de renvoi 5, plan et dont la surface réfléchissante est orientée vers l'intérieur du miroir collecteur 1, est disposé perpendiculairement au plan contenant les axes optiques 2 et 4a et est incliné par rapport à l'axe optique 2 du collecteur. De préférence, mais cela reste une caractéristique optionnelle, le bord supérieur 5a du deuxième miroir de renvoi 5 est au contact du bord supérieur 1 b du miroir collecteur 1. Comme mentionné plus haut, ce miroir peut aussi, alternativement, présenter une courbure, ne pas être plan.A second reflecting
Le deuxième miroir de renvoi 5 et le premier miroir de renvoi 4 sont positionnés de telle sorte que le foyer Fr1 du premier miroir de renvoi 4 est confondu avec, ou voisin de, l'image du foyer externe Fe du collecteur 1 donnée par le deuxième miroir de renvoi 5.The second reflecting
Le projecteur P comporte en outre une plieuse 6 constituée d'un miroir plan dont la surface réfléchissante est orientée vers l'intérieur du miroir collecteur 1. La plieuse 6 est disposée perpendiculairement au plan contenant les axes optiques 2 et 4a. Son bord supérieur 6a est adjacent au bord inférieur 5b du deuxième miroir de renvoi. Le bord inférieur 6b de la plieuse 6 est situé au voisinage du foyer Fr1 du premier miroir de renvoi 4 et son image, donnée par le premier miroir de renvoi 4, définit la coupure du faisceau lumineux émis par le projecteur P. Comme indiqué plus haut, la plieuse peut aussi être courbe, ne pas être plane.The projector P further comprises a
La partie inférieure de la paroi du miroir collecteur 1 comporte une échancrure 7 qui s'étend à partir du bord avant du miroir collecteur 1 vers l'intérieur selon un contour incurvé. Cette échancrure, avantageuse mais optionnelle, permet d'augmenter la quantité de lumière tombant sur le miroir 4.The lower part of the wall of the
La source lumineuse 3 est avantageusement une lampe à décharge 8. L'axe de la lampe à décharge 8 est sensiblement confondu avec l'axe optique 2. Typiquement, environ les deux tiers du flux de la lampe à décharge 8 sont émis vers la moitié supérieure du miroir collecteur 1, le tiers restant étant émis vers la moitié inférieure du miroir collecteur 1.The
Un tel agencement permet d'obtenir un faible encombrement, surtout en profondeur. Pour un projecteur P construit sur la base d'un paraboloïde 4 de focale 20 mm, il est possible d'obtenir une profondeur D (Fig.1) inférieure à 115 mm, pour une hauteur H de 127 mm et une largeur L (Fig.2) de 60 mm.Such an arrangement provides a small footprint, especially in depth. For a projector P built on the basis of a
Le fonctionnement du projecteur est le suivant.The operation of the projector is as follows.
Après allumage de la lampe 8, les rayons issus de la lampe tombent sur le miroir collecteur 1 et sont renvoyés vers le deuxième miroir de renvoi 5.After lighting the
Un rayon i1 émis à partir du foyer interne Fi est réfléchi suivant un rayon j1 par le miroir collecteur 1 en direction du foyer externe Fe. Le rayon j1 subit sur le deuxième miroir de renvoi 5 une réflexion en un point Q1 pour donner le rayon k1. Ce rayon k1 franchit tangentiellement le bord inférieur 6b de la plieuse 6. Le rayon k1 tombe sur le premier miroir de renvoi 4 en un point S1 où il est réfléchi suivant le rayon r1, vers l'avant du véhicule, parallèlement à l'axe optique 4a.A ray i1 emitted from the internal focal point Fi is reflected along a radius j1 by the
Un rayon i2 émis par un point de la source situé en avant du foyer interne Fi est réfléchi selon un rayon j2 par le miroir collecteur 1. Le rayon j2 atteint le deuxième miroir de renvoi 5 en un point Q2 situé plus bas que Q1 et est réfléchi suivant le rayon k2, qui tombe sur la plieuse 6 en R2 et est réfléchi en un rayon I2. Ce rayon I2 tombe en S2 sur le miroir 4 et est réfléchi selon un rayon r2, descendant par rapport à r1.A ray i2 emitted by a point of the source situated in front of the internal focal point Fi is reflected along a radius j2 by the
Un rayon i3 émis par un point de la source en arrière du foyer interne Fi est réfléchi selon un rayon j3 par le miroir collecteur 1. Le rayon j3 tombe sur le deuxième miroir de renvoi 5 en un point Q3 situé plus haut que Q1 et est réfléchi selon un rayon k3. Le rayon k3 passe entre l'extrémité inférieure du miroir réflecteur 1 et le bord inférieur 6b de la plieuse 6. Le rayon k3 tombe sur le premier miroir de renvoi 4 en un point S3 où il est réfléchi suivant un rayon r3 descendant par rapport au rayon r1.A ray i3 emitted by a point of the source behind the internal focus Fi is reflected along a radius j3 by the
On obtient un faisceau lumineux avec une coupure définie par l'image, donnée par le miroir 4, du bord inférieur 6b de la plieuse 6.A light beam is obtained with a cut defined by the image, given by the
L'allure générale du faisceau obtenu est illustré sur Fig. 4 à l'aide de courbes isocandela. On peut constater que l'éclairage est quasi nul au-dessus du plan horizontal passant par l'axe optique du premier miroir de renvoi 4. La zone éclairée est située au-dessous du plan horizontal et présente un contour sensiblement pentagonal.The general shape of the beam obtained is illustrated in FIG. 4 using isocandela curves. It can be seen that the illumination is almost zero above the horizontal plane passing through the optical axis of the first reflecting
D'autres modes de réalisation peuvent être envisagés.Other embodiments may be envisaged.
Pour faciliter la fabrication du projecteur tout en garantissant un bon positionnement des divers éléments, il est possible de réaliser le premier miroir de renvoi 4, le deuxième miroir de renvoi 5 et la plieuse 6 d'une seule pièce notamment en matière plastique moulée, avec un dépôt métallique réfléchissant pour les surfaces formant miroir.To facilitate the manufacture of the projector while ensuring a good positioning of the various elements, it is possible to realize the first reflecting
La forme du miroir collecteur peut être optimisée de manière à contrôler la répartition du flux lumineux. De la même manière, il est possible de modifier la forme du deuxième miroir de renvoi de manière à obtenir une seconde possibilité de maîtrise du faisceau lumineux.The shape of the collector mirror can be optimized to control the distribution of the luminous flux. In the same way, it is possible to modify the shape of the second reflecting mirror so as to obtain a second possibility of controlling the light beam.
Le premier miroir de renvoi peut présenter une surface complexe, c'est à dire une surface d'allure parabolique, mais plus complexe selon des conditions imposées. Il peut aussi comporter des stries déterminant plusieurs facettes.The first reflecting mirror may have a complex surface, ie a surface of parabolic appearance, but more complex according to imposed conditions. It can also include streaks determining several facets.
Dans le mode de réalisation décrit, les concavités du miroir collecteur et du premier miroir de renvoi sont orientées dans le même sens, vers l'avant, et le miroir collecteur est situé au-dessus du premier miroir de renvoi.In the embodiment described, the concavities of the collecting mirror and the first reflecting mirror are oriented in the same direction, forward, and the collecting mirror is located above the first reflecting mirror.
Ces dispositions ne sont pas indispensables. Pour des raisons d'encombrement, il est possible de placer le premier miroir de renvoi au-dessus du miroir collecteur et/ou d'orienter la concavité du miroir collecteur vers l'arrière. Les positions du deuxième miroir de renvoi et de la plieuse pourront être adaptées en conséquence.These provisions are not indispensable. For reasons of space, it is possible to place the first reflecting mirror above the collecting mirror and / or to orient the concavity of the collecting mirror towards the rear. The positions of the second deflection mirror and the folder may be adapted accordingly.
Il est également possible de réaliser la plieuse à partir de deux plans formant, par exemple, un angle de 15°. Dans ce cas le segment de droite représentant la plieuse sur Fig. 1 est l'intersection de ces deux plans.It is also possible to make the folder from two planes forming, for example, an angle of 15 °. In this case the line segment representing the folder in FIG. 1 is the intersection of these two planes.
Il faut noter que si le premier miroir de renvoi est de forme parabolique, il est préférable de modifier le bord inférieur de la plieuse de manière à compenser les aberrations apparaissant lorsque l'on s'éloigne de l'axe de l'ellipsoïde.It should be noted that if the first mirror is of parabolic shape, it is preferable to modify the lower edge of the folder so as to compensate for the aberrations appearing when one moves away from the axis of the ellipsoid.
Dans le cas où le premier miroir de renvoi comporte une surface complexe, il est possible de calculer la forme de cette surface de manière à obtenir une coupure comportant deux demi-droites formant un angle, par exemple de 15°, tout en utilisant une plieuse plane comportant un bord rectiligne.In the case where the first reflecting mirror comprises a complex surface, it is possible to calculate the shape of this surface so as to obtain a cut comprising two half-lines forming an angle, for example 15 °, while using a folder plane having a straight edge.
La zone située devant le deuxième miroir de renvoi 5 et devant la plieuse 6 peut être utilisée pour installer des fonctions annexes telles que des indicateurs de changement de direction.The area in front of the
On peut obtenir ainsi tout type de faisceau à coupure, notamment à coupure plate (type antibrouillard), ou à coupure au moins partiellement oblique (type code trafic à droite ou code trafic à gauche, de type européen ou américain).Any type of cut-off beam can thus be obtained, in particular with flat cutoff (fog type), or cut at least partially oblique (right-hand traffic code type or left-hand traffic type code, of the European or American type).
Claims (10)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0505694A FR2886712B1 (en) | 2005-06-06 | 2005-06-06 | PROJECTOR FOR MOTOR VEHICLE. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1731829A1 true EP1731829A1 (en) | 2006-12-13 |
EP1731829B1 EP1731829B1 (en) | 2009-01-21 |
Family
ID=35079385
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06290837A Not-in-force EP1731829B1 (en) | 2005-06-06 | 2006-05-23 | Vehicle projector |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1731829B1 (en) |
JP (1) | JP2006344599A (en) |
AT (1) | ATE421662T1 (en) |
DE (1) | DE602006004918D1 (en) |
ES (1) | ES2320376T3 (en) |
FR (1) | FR2886712B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101566296B (en) * | 2008-04-23 | 2010-11-17 | 市光工业株式会社 | Lamp fitting for vehicle |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5729047B2 (en) * | 2011-03-17 | 2015-06-03 | セイコーエプソン株式会社 | Light source device and projector |
JP6056056B2 (en) * | 2012-03-16 | 2017-01-11 | 株式会社ナオコ | LED lighting device |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1286106A1 (en) * | 2001-08-14 | 2003-02-26 | Stanley Electric Co., Ltd. | Vehicle headlight |
US20030090906A1 (en) * | 2001-04-24 | 2003-05-15 | Michihiko Hayakawa | Vehicle headlamp |
US20040022067A1 (en) * | 2002-05-13 | 2004-02-05 | Stanley Electric Co., Ltd. | Vehicle lamp and method |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0084934A1 (en) * | 1982-01-16 | 1983-08-03 | LUCAS INDUSTRIES public limited company | Lamp reflector |
FR2760070B1 (en) * | 1997-02-21 | 1999-05-28 | Valeo Vision | PROJECTOR COMPRISING A TWO-FILAMENT LAMP FOR GENERATING A CUT BEAM AND AN UNCUT BEAM |
JP2002093215A (en) * | 2000-09-19 | 2002-03-29 | Stanley Electric Co Ltd | Vehicle light |
JP2002093217A (en) * | 2000-09-19 | 2002-03-29 | Stanley Electric Co Ltd | Vehicle light |
-
2005
- 2005-06-06 FR FR0505694A patent/FR2886712B1/en not_active Expired - Fee Related
-
2006
- 2006-05-23 AT AT06290837T patent/ATE421662T1/en not_active IP Right Cessation
- 2006-05-23 ES ES06290837T patent/ES2320376T3/en active Active
- 2006-05-23 EP EP06290837A patent/EP1731829B1/en not_active Not-in-force
- 2006-05-23 DE DE602006004918T patent/DE602006004918D1/en active Active
- 2006-06-05 JP JP2006155520A patent/JP2006344599A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030090906A1 (en) * | 2001-04-24 | 2003-05-15 | Michihiko Hayakawa | Vehicle headlamp |
EP1286106A1 (en) * | 2001-08-14 | 2003-02-26 | Stanley Electric Co., Ltd. | Vehicle headlight |
US20040022067A1 (en) * | 2002-05-13 | 2004-02-05 | Stanley Electric Co., Ltd. | Vehicle lamp and method |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101566296B (en) * | 2008-04-23 | 2010-11-17 | 市光工业株式会社 | Lamp fitting for vehicle |
Also Published As
Publication number | Publication date |
---|---|
JP2006344599A (en) | 2006-12-21 |
ES2320376T3 (en) | 2009-05-21 |
ATE421662T1 (en) | 2009-02-15 |
DE602006004918D1 (en) | 2009-03-12 |
FR2886712B1 (en) | 2007-08-17 |
FR2886712A1 (en) | 2006-12-08 |
EP1731829B1 (en) | 2009-01-21 |
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