EP1491816B1 - Kfz-Scheinwerfer mit einem Spiegel und einem optischen Umlenkelement - Google Patents

Kfz-Scheinwerfer mit einem Spiegel und einem optischen Umlenkelement Download PDF

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Publication number
EP1491816B1
EP1491816B1 EP04291600A EP04291600A EP1491816B1 EP 1491816 B1 EP1491816 B1 EP 1491816B1 EP 04291600 A EP04291600 A EP 04291600A EP 04291600 A EP04291600 A EP 04291600A EP 1491816 B1 EP1491816 B1 EP 1491816B1
Authority
EP
European Patent Office
Prior art keywords
reflector
lens
additional
cut
optical axis
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.)
Expired - Lifetime
Application number
EP04291600A
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English (en)
French (fr)
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EP1491816A1 (de
Inventor
Pierre Albou
Vincent Godbillon
Antoine De Lamberterie
Eric Moisy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Vision SAS
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Valeo Vision SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from FR0307760A external-priority patent/FR2856773B1/fr
Priority claimed from FR0401497A external-priority patent/FR2866411A1/fr
Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Priority to PL04291600T priority Critical patent/PL1491816T3/pl
Priority to EP08160781A priority patent/EP2009347A1/de
Priority to SI200430964T priority patent/SI1491816T1/sl
Publication of EP1491816A1 publication Critical patent/EP1491816A1/de
Application granted granted Critical
Publication of EP1491816B1 publication Critical patent/EP1491816B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
    • F21S43/31—Optical layout thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/26—Elongated lenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/323—Optical layout thereof the reflector having two perpendicular cross sections having regular geometrical curves of a distinct nature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/334—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors
    • F21S41/336—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors with discontinuity at the junction between adjacent areas
    • 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

Definitions

  • the invention relates to a headlamp for a motor vehicle comprising: a reflector admitting an optical axis and at least one focus; a light source placed in the vicinity of a focus of the reflector; and a transparent optical deflection element placed in front of a portion of the reflector, this element being constituted by a module comprising a so-called "square lens" lens and a reflector placed at the rear of said lens, the module being able to ensure essentially a spreading horizontal light.
  • square lens By the simplifying expression "square lens”, and for the sake of brevity, it is understood in the context of the invention a lens having at least one face (inlet and / or outlet) cylindrical vertical generatrices.
  • the outline of the lens is not limited to the square shape, but can be rectangular, circular, oval, ovoid, ogival, or be of square or rectangular type contour but with rounded edges or cut sides, or any other contour.
  • a projector comprising such a square lens is known from EP-A-1,243,846 .
  • This projector has the advantage of a depth (that is to say, size in the direction of the optical axis) relatively low and a large luminous flux. However, the range of the light beam is reduced. In addition, this projector does not make it easy to cut the beam inclined horizontally, for example 15 °, to achieve a projector code.
  • the object of the invention is, above all, to provide a headlamp which, while maintaining a shallow depth and a large luminous flux, makes it possible to obtain a large range of the beam and, if desired, to cut the inclined beam on the horizontal, especially for a code function.
  • the wall of the reflector comprises at least one indentation on one side of a plane which is vertical, horizontal or oblique with respect to the vertical and passing through said optical axis.
  • the invention thus provides a number of embodiments, in which the general orientation of the optical system associating the lamp, the reflectors and the indentations can be either vertical or horizontal, or take any desired orientation with respect to the vertical, in particular to take Consider aesthetic considerations or dimensional requirements related to the vehicle that will be equipped with the projector in question.
  • the lamp used may be of filament lamp type whose orientation may be axial, transverse or oblique.
  • the optical axis mentioned above is therefore coincident with the axis of the filament of the lamp when it is chosen to have an axial orientation.
  • the spatial references used of the type “vertical”, “horizontal”, “lateral” or “oblique” are to be understood according to the positioning of the elements considered of the projector, once the projector mounted in the vehicle .
  • the square lens module is advantageously optimized in total flux collected, as for its horizontal guide curve, for a given depth of the projector and with the greatest possible focal length.
  • the square lens module can also be optimized in total flux collected, as to the height of its vertical section, for a given depth of the projector and with the greatest possible focal length, especially when the indentation or notches are on one side. a vertical or oblique plane passing through the optical axis.
  • the height of the reflector and of the lens facing it is preferably chosen so as to ensure the best possible collection of the luminous flux (for the focal length obtained during the optimization of the vertical generatrix and taking into account the acceptable limit depth, this determines the height of the vertical section of the reflector, this height being the highest of the square lens module whose apparent apparent surface then takes on the appearance of an oval).
  • a horizontal parallel beam is not, or substantially not, vertically deflected.
  • the wall of the reflector (R) comprises two notches (2, 3) located on either side of a plane passing through the optical axis, at least one additional reflector (M2, M3) being associated with each notch and disposed on the side of the notch opposite the optical axis to produce an additional beam that is not intercepted by the lens.
  • the indentations will be respectively above and below a selected horizontal plane passing through the optical axis or respectively to the right and left of a selected vertical plane passing through the optical axis.
  • the plan can also be oblique, as already mentioned.
  • At least one additional reflector is associated with each notch and disposed on the side of the notch opposite the optical axis to produce an additional beam that is not intercepted by the lens.
  • these reflectors are on the side where the light escapes through said indentation.
  • Each notch may be located in a horizontal or vertical or oblique plane. It is also possible to combine several types of notches, and to have a system with, for example, a notch in a substantially vertical plane and a notch in a substantially horizontal plane. The two indentations can be disjointed or, on the contrary, be joined and thus form a single notch, shaped L or T for example. It is then possible to obtain an optical system that is also schematically L-shaped, V-shaped, or T-shaped, and not only of horizontal or vertical "linear" appearance.
  • the limit of the additional reflector (or at least one of them if there are several) on the side of the light source is such that no light is lost between the reflector R and the additional reflector , at the level of the notch.
  • the additional reflector reaches at least the shadow limit created by the reflector R in the beam emitted by the light source.
  • the additional reflector or reflectors are preferably of complex surface. They are intended to increase the range of the light beam.
  • the additional reflector or reflectors are also provided to create a cut of the light beam inclined to the horizontal, in particular at 15 °.
  • the additional reflectors are spaced apart from the lens, in particular vertically or horizontally according to their arrangement, by a distance sufficient to prevent the beam reflected by these reflectors from interfering with the lens.
  • Additional reflector surfaces may be limited by the plane tangent to the exit surface of the lens and orthogonal to the optical axis, so as not to increase the overall depth of the system.
  • At least one space created between an additional reflector and the reflector of the lens is used to perform another lighting or signaling function, without increasing the overall size.
  • a DRL (Day Running Light) function can be installed between an additional top reflector and the top edge of the lens.
  • the illuminating surface, to ensure the DRL function can be increased by at least a portion of the surface of the lens, by illuminating an edge of the lens (in particular its upper edge or its lateral edge depending on whether the reflector arrangement is vertical or horizontal type), using the beam created by the DRL reflector.
  • the additional functions are performed using simple reflectors so that all the reflectors can be made in one piece, which can be demolded in the direction of the optical axis.
  • the additional functions can be envisaged as lantern, direction or ID lights, fog lights or AB lights, fixed cornering lights or FBL (for Fixed Bending Light).
  • said diodes are preferably disposed below a horizontal plane containing the optical axis of the light source providing the code function, to be less exposed to heating.
  • an additional reflector in two parts, namely an extreme part, giving the smallest images, essentially providing a large range and the area inclined cut, and a special part, closer to the optical axis, intended to display its images under the cut towards the tip of the V.
  • a means for vertically moving the light beam from the square lens relative to the beam of additional reflectors A lowering of the beam of the square lens is obtained by a rotation of the exit face of the lens around its upper horizontal edge. This rotation can be provided by an added prism against the exit face of the lens, or by an appropriate definition of the exit face of the lens to achieve the same effect.
  • the top, bottom, or side of the system can be favored for additional reflectors.
  • the system may have an asymmetrical configuration better suited to integration into a given projector.
  • the light source formed by a lamp can then be shifted, in the direction of the additional reflectors, relative to the square lens. Such positioning makes it possible to obtain a more closed surface in the direction opposite to that of the offset.
  • the additional reflectors To maintain a sufficient range of the light beam, it is possible for the additional reflectors to have surfaces which, on the favored side, extend beyond the plane of exit of the lens. The depth along the optical axis of the main reflector is then greater, but this depth following a normal to the oblique exit glass of the projector may be lower.
  • the surfaces of the additional reflectors may comprise ridges delimiting facets, in particular at least one central facet and two lateral facets.
  • FIG. 1 to 10 relate to a first embodiment of the invention, wherein the general orientation of the projector, or at least the optical system comprising the reflectors, the light source and the lens, is vertical.
  • a “vertical” or “vertical” optical system is referred to.
  • a light projector P for a motor vehicle having a reflector R admitting an optical axis YY and at least one focus F1, a light source S placed in the vicinity of the focal point, and a transparent optical deflection element D placed in front of the reflector R can be seen.
  • the deflection element D is constituted by a square lens 1 having at least one cylindrical face 1b with vertical generatrices, adapted to ensure a horizontal spread of the light, without significant influence in the vertical direction.
  • a lens of this type is described in EP-A-1,243,846 .
  • the input face or rear face 1a of the lens 1 is flat, orthogonal to the optical axis YY, while the front face 1b is the cylindrical face with vertical generatrices based on a horizontal directional curve A.
  • the director A may comprise a central portion convex forwardly between two concave portions.
  • the outline of the lens 1 ( Fig.1 ) is generally rectangular or square, but this lens could be cut in a circular outline or other.
  • the cylindrical face 1b of the lens is turned towards the rear and constitutes the input face while the flat face 1a is the exit face facing forward.
  • the face 1 may be optionally cylindrical, especially for reasons of style.
  • the reflector R constitutes a substantially convergent mirror (the edges may be parabolic, and the reflector may therefore have locally non-convergent zones), whereas the lens 1 is partially divergent.
  • the light source S can be constituted by the filament of an incandescent lamp, or by the arc of a gas discharge lamp.
  • the different elements of the headlamp can be housed in a B-box closed at the front by a G-shaped smooth ice ( Figs.2 and 9 ).
  • the housing is arranged around cheeks J1, J2 to which lens 1 is attached.
  • the reflector R is designed to generate a light beam delimited by a horizontal upper cut Lg (see Fig.6 ).
  • EP-A-1,243,846 describes a method for calculating the area of the reflector R.
  • the section ( Fig.4 ) of the reflector R by a horizontal plane passing through the optical axis YY is constructed according to a specific law, chosen so that the curve of the section closes sufficiently around the source S to recover a large luminous flux.
  • the focal distance f0 between the point F1 and the theoretical background of the reflector (the rear part of this reflector is cut to create a passage) also makes it possible to intervene on the recovery of luminous flux. The recovery is even higher than this focal distance f0 is lower.
  • the wall of the reflector R comprises at least one indentation, and preferably two indentations 2, 3 located in a horizontal plane, respectively above and below the optical axis Y-Y.
  • the indentations 2, 3 may extend at least to the rear end of the filament, or arc, of the source S.
  • At least one additional reflector M2, M3 is associated with each notch 2, 3 and is arranged on the side of the notch opposite the optical axis.
  • Additional reflectors M2, M3 are designed to collect, at least partially, the light escaping through the indentations 2, 3 and to return this light in the direction of exit (parallel to the optical axis YY) without it crossing the lens 1. Additional reflectors M2, M3 can be spaced at will in the vertical direction. However, it is necessary to limit them, preferably, by the plane Q of the exit surface of the lens 1 so not to increase the overall depth of the system in the direction of the optical axis.
  • the additional reflectors M2, M3 are provided to give a light beam having a large range along the optical axis YY, but much less spread than that produced by the lens 1.
  • the reflectors M2, M3 are also generally provided to give a beam located below a cut line Ld (see Fig.6 ) inclined to the horizontal of a given angle (depending on the type of pipe to the right or left) to perform a code function.
  • the cut line Ld of the beam produced by the reflectors M2, M3 is inclined by 15 ° on the horizontal and rises from left to right.
  • the reflectors M2, M3 are of the complex surface type, especially of the "verticalized reflector" type as taught by EP-A-0 933 585 .
  • Such a reflector extends mainly in the vertical direction and its surface is determined to reflect in a substantially horizontal direction, below a cut line, light rays from a source located in the vicinity of the focus.
  • the complex surfaces of these reflectors are adapted to transverse filaments which make it possible to reduce the height of the images used to achieve the maximum of illumination, and thus to reduce the light that "hangs" on the road.
  • the cut inclined at 15 ° on the horizontal is then performed by shifting upward the images naturally having an inclination of between 0 ° and 15 °.
  • a rigorously transverse filament substantially decreases the light flux captured by the module. It is, however, possible to tilt it, in a horizontal plane, so as to increase the flux captured: it will then preferably use an axial filament lamp more common and reliable than a transverse filament lamp. This moves the passage hole of the lamp and the shadow cone of its opaque end (black top): the useful flow can remain collected, at least on one side, to the exit face of the mirror.
  • the consequence on the surfaces is a change of position of the hearths to be taken into account to generate the parabolic cylinders and, for the "verticalized" reflector, a change of the zone to be shifted to construct the line of cut inclined at 15 ° on the horizontal.
  • Reflectors M2, M3 to give a good range, it is interesting to separate them vertically from the light source S to have the smallest possible images. This spacing is however limited by the total height acceptable for the projector.
  • the surfaces of the reflectors M2, M3 are of any generator and driven fires, giving images rotated at a desired angle around the axis of the filament and redécoupées.
  • the filament is transversal (in the case of complex so-called vertical surfaces), images are shifted.
  • the choice of the vertical spacing and the data of the output plane Q define the focal length of the additional complex surfaces M2, M3 which, by way of non-limiting example, may be of the order of 20 to 25 mm.
  • the generator of the surfaces of the reflectors M2, M3 is chosen quasi parabolic to maximize the intensity of the light beam with however a rightward sweep, in right traffic, of the largest images, in order to create a beam of significant size limited by a cut at 15 °.
  • the upper reflector M2 is spaced vertically from the reflector R so as to prevent downward portions of the images coming from the reflector M2 from meeting the upper edge of the lens 1 and thus creating glare by glassy reflection.
  • the vertical spaces E2 and E3 respectively created between the reflector R and the additional reflectors M2 and M3 are advantageously used to perform other functions without increasing the overall size of the projector P.
  • a DRL function is installed in the E2 space. This function is performed using an appropriate reflector 4 fixed in the space E2 by any conventional means not shown, and a suitable light source 5.
  • a minimum illuminating surface is imposed by the regulations. If necessary, the illuminating surface of the reflector 5 can be increased to that of the lens 1, or part of this lens, by illuminating the upper edge 6 of the lens with a part of the surface of the reflector DRL 4.
  • lantern for example: lantern, direction indicator ID, fog light AB, fixed cornering lights FBL, can be installed in spaces E2, E3. If the additional functions envisaged are carried out with light-emitting diodes, they are preferably placed below the lamp code constituting the source S, for thermal reasons.
  • the reflectors of the added functions must be located behind the light cones C2, C3 ( Fig.3 ) from the main source S and resting on the edges of the openings 2, 3 of the reflector R.
  • Additional functions such as DRL, lantern or other, are advantageously made using simple reflectors made integral with the reflector R and additional reflectors M2, M3 so that the assembly can be made in one piece that can be demolded following the direction of the optical axis YY.
  • the square lens module 1 is optimized, as to its directional curve A, for a given depth H ( Fig.4 ), in total flux collected and with the greatest possible focal distance.
  • the sections of the reflector R by vertical planes consist of quasi parabolas little vertically enveloping because of a relatively large focal length.
  • Cutting by a vertical plane passing through the optical axis YY ( Fig.2 ) has, at the level of the reflector R, an upper part composed of two arcs R1, R2 of quasi-parabola, with different foci F1, F2 and at the lower part of two arcs R3, R4, of quasi parabola with foci different F3, F4.
  • the light source S is schematized in the form of a cylinder of revolution whose axis is parallel to the optical axis Y-Y, situated above this axis and having its lower generatrix tangent to the optical axis.
  • the arc R1 is provided so that its focus F1 is located on the optical axis YY at the rear end (or in the neighborhood) of the source S.
  • the arc R2 is provided so that its focus F2 is located at the rear end high (or near) the source S, that is to say slightly above the optical axis YY.
  • the lower arc R3 is provided so that its focus F3 is located on the optical axis YY at the front end (or in the vicinity) of the source S.
  • the arc R4 is provided so that its focus F4 is located at the front end high (or near) the source S, so slightly above the axis YY.
  • the upper part R1, R2 has a lower focal length than the lower part R3, R4, the difference between the two focal lengths corresponding to the length of the filament of the light source.
  • the filament has a axial length of 4mm
  • the focal length of the upper part R1, R2 is 12mm while that of the lower part R3, R4 is 16mm.
  • the greater the focal length the less sensitive a positioning error of the source S.
  • the positioning tolerance of the source S is generally of the order of 0.15mm.
  • the piloting of the hearths is planned in such a way as to optimize the cut-off sharpness of the beam coming from the square lens above the horizontal line Lg. This is achieved through an iterative process.
  • the position parameters of the lens 1 and the different foci of the generator (corresponding to a section by a vertical plane) of the reflector R are chosen so as to minimize the depth.
  • a minimum space requirement is nevertheless imposed by the minimum distance required between the front end, or balloon, of the source S and the lens 1 to avoid thermal problems and interception of light rays.
  • the figure 3 represents a dashed axis, passing in the space E2 and touching the lower edge of the reflector R: by extending this axis downwards, we see that it constitutes in fact the shadow limit created by the reflector R: in this configuration, no or almost no light is "lost" at the notch: all the light escaping from R by the indentation is recovered by the reflector M4.
  • FIG.4 An example of piloting the foci of the vertical sections of the reflector R is given with reference to Figs. 4 and 5 .
  • Fig.4 we consider a light ray i coming from the center of the source S, falling on the reflector R at a point m on the horizontal section containing the optical axis.
  • the normal at the surface of the reflector R at the point m is represented by the line n.
  • the radius i is reflected in the symmetrical direction q of the radius i with respect to n.
  • the section of the reflector R by a vertical plane passing through the direction q and corresponding to the section VV is illustrated on Fig.5 by the curve Rq which consists of four different curve arcs Rq1, Rq2, Rq3 and Rq4.
  • Fig.6 is a simplified diagram of a central area illuminated by a projector code according to the invention, on a screen orthogonal to the optical axis placed at a determined distance (usually 25 meters) from the projector.
  • the beam is cut above a V line comprising a horizontal left arm Lg and a straight leg Ld inclined to the horizontal of 15 ° and rising from left to right.
  • the intersection of the two branches defines the tip K of V.
  • zone IV The area below the horizontal line Lg, on either side of tip K, is defined as "zone IV" by a standard.
  • the illumination in this zone IV must reach a predetermined minimum level.
  • the lower supplementary reflector comprises two parts: an end part corresponding to the previously described reflector M3, giving the smallest images, and an upper part consisting of a special surface formed by another additional reflector M4 ( Figs.2 and 3 ) arranged to spread the images of the source under the cut Lg in the zone IV, up to an angle of 6 ° between the optical axis and the direction passing through the center of the projector and the far left edge of the zone IV.
  • This additional reflector M4 is preferably arranged in the lower part because the surface of the reflector R is more open in its lower part whose focal length is greater, for a positioning of the lamp S in the center.
  • a characteristic point referred to as "75R" according to a standard, is located slightly to the right of the K point in defined coordinates.
  • the light beam issuing from square lens 1 is displaced relative to the light beam coming from additional reflectors M2, M3.
  • the light beam of the square lens 1 is lowered vertically relative to the beam of the additional reflectors M2, M3.
  • the right branch Ld of the cutoff V does not move because it results in additional reflectors.
  • the horizontal branch Lg due to the beam of the square lens 1 is displaced downwards as shown in FIG. Fig.7 .
  • the K tip of the cutoff V moves on the Ld line down and to the left, as shown in Fig.7 .
  • the beam of the square lens 1 has been lowered by 0.33 °. This amounts, after adjustment, to move the beam 2% (tangent of the angle of displacement) to the right and 0.5% (tangent of the angle of displacement) upwards.
  • the downward movement of the beam issuing from the square lens 1 may be ensured by a rotation of the exit face of the lens around a horizontal axis constituted by its upper edge.
  • the exit face of the lens is then preferably constituted by the plane face 1 a.
  • the rotation of the exit face is obtained by adding a prism 7 whose face is glued against the face 1a.
  • the edge of the prism is applied against the upper edge of the exit face of the lens while the base is at the bottom.
  • the prism 7 may be made of the same material as the lens to have same refractive index.
  • the prism 7 may not exist physically: one then simply has a lens with a flat face making with the "vertical” an appropriate angle, the "vertical” to be understood as being the axis of the generatrices of the other face of the lens.
  • the depth H1 along the optical axis is then greater, but if we consider the exit ice G generally oblique, the depth H2 in a direction perpendicular to the mean direction of the ice G is lower.
  • the cheeks J1, J2 do not pose a problem for the opening of the beam to the extent that the width of the beam is obtained by the lens 1, while the light beams from the other parts such as M2, M3 are narrow.
  • the spaced images provided for extending the sloped cut line Ld come from the central area of the additional reflectors.
  • the cheeks J 1, J 2 do not have an optical role.
  • the surfaces of the additional reflectors M2, M3 may have ridges reminding the extruded line of the lens 1.
  • Fig.10 is a diagram of the photometry of the light beam obtained, with a plot of isolux curves (points having the same illumination).
  • the central curve lm is that of a strong illumination, for example 48 lux.
  • the maximum illuminance point for example 68 lux, is located within this curve.
  • the outer curve If corresponds to a low illumination, for example 0.4 lux.
  • the intermediate curves correspond to illuminations decreasing from the center to the outside.
  • the horizontal graduations expressed in% correspond to the tangent of the angle formed between the optical axis and the horizontal direction passing through the center of the projector and the point marked by the graduation on the screen. For vertical graduations, it is the tangent of the angle formed between the horizontal plane passing through the optical axis and the direction passing through the center of the projector and the point marked by the graduation on the screen.
  • a projector according to the invention allows a high flux captured and therefore good efficiency.
  • the depth of the projector is limited. All reflectors, including reflectors for additional functions, DRL or other, can be demolded at one time without the need for a drawer for molding.
  • the projector does not have a cover that absorbs light.
  • FIG. 11 is a perspective view of the optical system: We find the reflector R, the lens D whose contours are here chosen substantially oval. And the M2 reflector. The lens is secured to the reflector R by an element E which encloses entirely its periphery.
  • this fastening element E may surround only a part of the periphery of the lens, either for aesthetic reasons, or to provide, especially in the upper part, one or more openings providing better ventilation, so less heating of the optical system.
  • the figure 12 which is a horizontal sectional view, represents the lamp S with axial filament, the "square" lens D here of ogival shape, and the indentation 2.
  • a horizontally disposed M2 reflector and a notch 2 which is substantially in a vertical orientation.
  • the reflector M2 is of the complex surface type, and makes it possible to obtain a code light with cutoff at 15 °.
  • the figure 13 which is a front view, shows that the reflector M2 can be schematically decomposed into three zones: the zone Z1, preferably devoid of streaks, and the zones Z2 and Z3: the zone Z2, which is arranged in the lower right part of the reflector M2, is the area dedicated to obtaining the cut at 15 °, the zone Z3, which is arranged above the zone Z1, contributes to the scope of the beam, with a cut of the horizontal type.
  • the zones Z2 and Z3 are provided with streaks, but this is not mandatory.
  • This example relates to the figure 14 , and is close in design, in example 2: it is also a horizontal type of optical system, with the same lens as in example 2.
  • the only difference lies in the relative positioning of the reflector R with respect to the reflector M2 : the arrangement of the reflector M2 with respect to the lens D is inverted with respect to the vertical, and the zone Z2 dedicated to make the cut at 15 ° is now in the upper left part of the reflector M2, above the zone Z3 contributing within range of the beam.
  • This example relates to the figure 15 extremely schematic, which is a front view of a fourth type of projector according to the invention: It is an inverted L-shaped projector, where the lens D and its reflector R is associated with two reflectors additional M2 and M3, the reflector R defining two notches 2,3 so that a portion of the light emitted by the light source can respectively escape to the reflectors M2 and M3.
  • the reflectors M1, M2 are arranged perpendicularly relative to each other, and the two notches 2,3 are also perpendicular to each other, and joined in a single opening. They could also be disjointed.
  • This projector example can also be modified to have non inverted L shapes, T shapes, oblique shapes.
  • the invention allows quantities of variants, and allows forms of optical systems very varied in their general appearance.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Claims (18)

  1. Kraftfahrzeugscheinwerfer mit einem Reflektor (R), der eine optische Achse (Y-Y) und wenigstens einen Brennpunkt (F1) aufweist, einer Lichtquelle (S), die in der Nähe eines Brennpunkts des Reflektors angeordnet ist, und einem lichtdurchlässigen optischen Ablenkungselement (D), das vor einem Teil des Reflektors angeordnet ist, wobei dieses Element ein Modul mit einer Linse umfasst, die wenigstens eine Zylinderfläche (1) mit senkrechten Erzeugenden aufweist, wobei der Reflektor (R) hinter der Linse angeordnet und dazu vorgesehen ist, ein Lichtbündel zu erzeugen, das durch eine waagerechte obere Hell-Dunkel-Grenze begrenzt wird, wobei das Modul eine im Wesentlichen horizontale Auffächerung des Lichts zu gewährleisten vermag,
    dadurch gekennzeichnet, dass:
    - die Wand des Reflektors (R) auf einer Seite einer durch die optische Achse (Y-Y) des Reflektors verlaufenden Ebene wenigstens einen Ausschnitt (2, 3) aufweist,
    - und wenigstens ein Zusatzreflektor (M2, M3) auf der Seite des Ausschnitts (2, 3) gegenüber der optischen Achse (Y-Y) angeordnet ist, wobei der Zusatzreflektor dazu vorgesehen ist, wenigstens einen Teil des von der Lichtquelle stammenden und durch den Ausschnitt austretenden Lichts zu erfassen und ein Zusatzlichtbündel zu erzeugen, das nicht von der Linse aufgefangen wird, wobei der oder die Zusatzreflektoren (M2, M3) dazu vorgesehen sind, eine zur Horizontalen schräg verlaufende Hell-Dunkel-Grenze (Ld) des Lichtbündels zu erzeugen.
  2. Scheinwerfer nach Anspruch 1,
    dadurch gekennzeichnet, dass die Wand des Reflektors (R) auf einer Seite einer bezüglich der Vertikalen senkrechten, waagerechten oder schrägen und durch die optische Achse (Y-Y) verlaufenden Ebene wenigstens einen Ausschnitt (2, 3) aufweist.
  3. Scheinwerfer nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass die Wand des Reflektors (R) zwei Ausschnitte (2, 3) aufweist, die beidseits einer durch die optische Achse verlaufenden Ebene liegen, insbesondere oberhalb bzw. unterhalb einer durch die optische Achse verlaufenden waagerechten Ebene oder rechts bzw. links einer durch die optische Achse verlaufenden senkrechten Ebene, wobei jedem Ausschnitt wenigstens ein Zusatzreflektor (M2, M3) zugeordnet ist und auf der Seite des Ausschnitts gegenüber der optischen Achse angeordnet ist, um ein Zusatzlichtbündel zu erzeugen, das nicht von der Linse aufgefangen wird.
  4. Scheinwerfer nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass der oder wenigstens einer der Ausschnitte (2, 3) in einer bezüglich der Vertikalen waagerechten, senkrechten oder schrägen Ebene liegt.
  5. Scheinwerfer nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass der oder die Zusatzreflektoren (M2, M3) eine komplexe Oberfläche haben, die zum Vergrößern der Reichweite des Lichtbündels vorgesehen ist.
  6. Scheinwerfer nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass der oder die Zusatzreflektoren (M2, M3) dazu vorgesehen sind, eine zur Horizontalen um 15° geneigte Hell-Dunkel-Grenze (Ld) des Lichtbündels zu erzeugen.
  7. Scheinwerfer nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass die Zusatzreflektoren (M2, M3) von der Linse (1) insbesondere vertikal oder horizontal weit genug beabstandet sind, um zu verhindern, dass das von diesen Reflektoren zurückgestrahlte Lichtbündel mit der Linse interferiert.
  8. Scheinwerfer nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass wenigstens ein zwischen einem Zusatzreflektor (M2) und dem Reflektor (R) der Linse erzeugter Zwischenraum (E2) dazu genutzt wird, eine weitere Beleuchtungs- oder Signalgebungsfunktion auszuführen, ohne dabei den Gesamtraumbedarf zu erhöhen.
  9. Scheinwerfer nach dem vorhergehenden Anspruch,
    dadurch gekennzeichnet, dass eine DRL-Funktion (4, 5) zwischen einem Zusatzreflektor (M2) und einem insbesondere oberen oder seitlichen Rand der Linse (1) angeordnet ist.
  10. Scheinwerfer nach Anspruch 9,
    dadurch gekennzeichnet, dass die Leuchtfläche zur Ausführung der DRL-Funktion durch wenigstens einen Teil der Oberfläche der Linse (1) vergrößert ist, indem ein insbesondere oberer oder seitlicher Rand der Linse mit Hilfe des durch den DRL-Reflektor (4) erzeugten Lichtbündels beleuchtet wird.
  11. Scheinwerfer nach einem der Ansprüche 8 bis 10,
    dadurch gekennzeichnet, dass die zusätzlichen Funktionen mit Hilfe einfacher Reflektoren (4) solchermaßen realisiert werden, dass sämtliche Reflektoren (R, M2, M3, 4) in einem einzigen Stück ausgeführt sein können, das in Richtung der optischen Achse entformbar ist.
  12. Abblendlichtscheinwerfer nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass er einen zweiteiligen zusätzlichen Reflektor aufweist, nämlich mit einem äußeren Teil (M3), der die kleinsten Abbildungen erzeugt und im Wesentlichen eine große Reichweite und einen Bereich mit geneigter Hell-Dunkel-Grenze (Ld) sicherstellt, und einem speziellen Teil (M4) näher an der optischen Achse, der dazu vorgesehen ist, seine Abbildungen unterhalb der Hell-Dunkel-Grenze in Richtung des Punkts (K) der V-förmigen Hell-Dunkel-Grenze aufzufächern, insbesondere wenn der Ausschnitt in einer waagerechten oder schrägen Ebene liegt.
  13. Abblendlichtscheinwerfer nach Anspruch 12,
    dadurch gekennzeichnet, dass er zur Optimierung des Beleuchtungswertes in Punkten, deren Lage bezüglich des Punkts (K) der V-förmigen Hell-Dunkel-Grenze festgelegt wird, ein Mittel (7) aufweist, um das von der quadratischen Linse (1) ausgehende Lichtbündel bezüglich des Lichtbündels der Zusatzreflektoren (M2, M3) senkrecht zu verlagern.
  14. Abblendlichtscheinwerfer nach Anspruch 13,
    dadurch gekennzeichnet, dass ein Absenken des Lichtbündels der quadratischen Linse (1) durch ein an der Austrittsseite der Linse (1) angefügtes Prisma (7) oder durch eine geeignete Festlegung der Austrittsseite der Linse erfolgt.
  15. Scheinwerfer nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass die Oberflächen der Zusatzreflektoren durch die die Austrittsfläche der Linse tangierende und zur optischen Achse orthogonale Ebene (Q) begrenzt sind.
  16. Scheinwerfer nach einem der Ansprüche 1 bis 15 mit schräger Scheibe (G),
    dadurch gekennzeichnet, dass zur Beibehaltung einer ausreichenden Reichweite des Lichtbündels für den Zusatzreflektor (M3) Oberflächen vorgesehen sind, die über die Austrittsebene (Q) der Linse hinausreichen.
  17. Scheinwerfer nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass der oder wenigstens einer der Zusatzreflektoren (M) wenigstens bis zu der Schattengrenze reicht, die durch den Reflektor (R) in dem von der Lichtquelle emittierten Lichtbündel erzeugt wird.
  18. Fahrzeug, ausgestattet mit wenigstens einem Scheinwerfer nach einem der vorhergehenden Ansprüche.
EP04291600A 2003-06-27 2004-06-24 Kfz-Scheinwerfer mit einem Spiegel und einem optischen Umlenkelement Expired - Lifetime EP1491816B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PL04291600T PL1491816T3 (pl) 2003-06-27 2004-06-24 Reflektor dla pojazdu samochodowego zawierający odbłyśnik i optyczny element odchylający
EP08160781A EP2009347A1 (de) 2003-06-27 2004-06-24 Kfz-Scheinwerfer mit einem Spiegel und einem optischen Umlenkelement
SI200430964T SI1491816T1 (sl) 2003-06-27 2004-06-24 Žaromet za motorno vozilo, obsegajoče žaromet in optičen odklonski element

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR0307760 2003-06-27
FR0307760A FR2856773B1 (fr) 2003-06-27 2003-06-27 Projecteur pour vehicule automobile comportant un reflecteur et un element de deviation optique
FR0401497A FR2866411A1 (fr) 2004-02-13 2004-02-13 Projecteur pour vehicule automobile comportant un reflecteur et un element de deviation optique
FR0401497 2004-02-13

Related Child Applications (1)

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EP08160781A Division EP2009347A1 (de) 2003-06-27 2004-06-24 Kfz-Scheinwerfer mit einem Spiegel und einem optischen Umlenkelement

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EP1491816A1 EP1491816A1 (de) 2004-12-29
EP1491816B1 true EP1491816B1 (de) 2008-09-10

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EP04291600A Expired - Lifetime EP1491816B1 (de) 2003-06-27 2004-06-24 Kfz-Scheinwerfer mit einem Spiegel und einem optischen Umlenkelement
EP08160781A Withdrawn EP2009347A1 (de) 2003-06-27 2004-06-24 Kfz-Scheinwerfer mit einem Spiegel und einem optischen Umlenkelement

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EP (2) EP1491816B1 (de)
JP (1) JP4583084B2 (de)
AT (1) ATE408090T1 (de)
DE (1) DE602004016421D1 (de)
ES (1) ES2314350T3 (de)
PL (1) PL1491816T3 (de)
SI (1) SI1491816T1 (de)

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Also Published As

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JP2005038846A (ja) 2005-02-10
EP1491816A1 (de) 2004-12-29
JP4583084B2 (ja) 2010-11-17
ES2314350T3 (es) 2009-03-16
US20040264210A1 (en) 2004-12-30
SI1491816T1 (sl) 2009-02-28
ATE408090T1 (de) 2008-09-15
EP2009347A1 (de) 2008-12-31
PL1491816T3 (pl) 2009-01-30
DE602004016421D1 (de) 2008-10-23
US7121705B2 (en) 2006-10-17

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