EP1739345A1 - Optisches Modul für Kraftfahrzeug - Google Patents

Optisches Modul für Kraftfahrzeug Download PDF

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Publication number
EP1739345A1
EP1739345A1 EP06291038A EP06291038A EP1739345A1 EP 1739345 A1 EP1739345 A1 EP 1739345A1 EP 06291038 A EP06291038 A EP 06291038A EP 06291038 A EP06291038 A EP 06291038A EP 1739345 A1 EP1739345 A1 EP 1739345A1
Authority
EP
European Patent Office
Prior art keywords
reflector
additional
module according
main
main reflector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP06291038A
Other languages
English (en)
French (fr)
Other versions
EP1739345B1 (de
Inventor
Jean-Luc Meyrenaud
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Vision SAS
Original Assignee
Valeo Vision SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP1739345A1 publication Critical patent/EP1739345A1/de
Application granted granted Critical
Publication of EP1739345B1 publication Critical patent/EP1739345B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/334—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/331—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of complete annular areas
    • F21S41/332—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of complete annular areas with continuity 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/255—Lenses with a front view of circular or truncated circular outline
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/29—Attachment thereof
    • F21S41/295—Attachment thereof specially adapted to projection 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
    • F21S41/39—Attachment thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/10—Construction
    • F21V7/16—Construction with provision for adjusting the curvature

Definitions

  • the invention relates more particularly, but not exclusively, to an optical module, in particular of code, fog or highway code called "motorway”, intended to produce at least one light beam with a cut in the upper region of the beam, this optical module having a cover located in the vicinity of the second focus of the reflector, cache whose upper edge determines the cut.
  • a projector optical module for example road or code projector, must provide a light beam whose photometry meets the requirements imposed by the regulations in force.
  • a light beam while meeting the regulatory requirements may have different photometries.
  • the isolux curves of the beam on a screen located at a distance, generally 25 m, from the headlamp and orthogonal to the optical axis of the headlamp may be more or less narrowed in the vertical direction or more or less spread in the horizontal direction. . This results in different illumination of the road on which the vehicle is traveling and aisles.
  • the object of the invention is, above all, to provide a projector optical module which, while remaining at an acceptable cost price, makes it possible to produce a light beam better adapted to the requirements of the various manufacturers or users.
  • a projector optical module of the kind defined above is such that an additional reflector with a curved surface having a substantially coincidental focus with the internal focus of the main reflector, but with different parameters from those of the main reflector, is inserted into this reflector, preferably without substantially increasing the dimensions, which allows, in particular, to change the characteristics of the light beam according to the requirements.
  • the term "inserted" requires that the additional reflector is fitted into the main reflector, to a given depth: a portion of the main reflector is thus covered, hidden by the additional reflector.
  • These overlapping reflector portions may be in mechanical contact continuously or not, but even in the latter case, they are very close to each other.
  • the total depth of the main reflector + additional reflector assembly is thus substantially identical to that of the main reflector alone.
  • the surface of the additional reflector that overlaps that of the main reflector "replaces" it optically.
  • the main reflector is preferably of a shape close to an ellipsoid.
  • This term includes a reflector surface which is substantially in accordance with an ellipsoid. More specifically, it is a reflector defined so that everything happens as if its first focus were fixed and its second focus was variable, this second focus being all the more distant from the first one that we consider a point of the reflector remote from the bottom of said reflector.
  • the additional reflector is of quadric type. It can be close to an elliptical, a parabolic or a conical shape. It may be a reflective surface constructed from a generator close to an ellipse and whose ends are close to a parabola.
  • It can be located in the front part of the main reflector and form a crown or ring, or in the rear part.
  • the rear edge of an additional ring-shaped reflector may be located in a plane, in particular orthogonal to the optical axis of the main reflector.
  • the rear edge of the additional reflector may form a left curve.
  • the additional reflector located in the front part can be provided to change the width of the light beam.
  • the optical module may be provided to produce a light beam with a cutoff in the upper region of the beam and then comprise a cover located in the vicinity of the second focus of the main reflector, the upper edge determining the breaking of the beam.
  • the optical module can be of the bi-function type, for example road / code, in which case the cache provided for the light beam with cutoff is retractable for the road function. It can also be multi-function, with a cache that can adopt at least three different positions for the module to emit at least three different types of beams.
  • the additional reflector may be made of molded plastic whose inner surface is reflective, for example by aluminization, or be made of cast aluminum.
  • the thickness of the additional reflector is preferably reduced, for example from 5 to 7 tenths of a millimeter.
  • the attachment of the additional reflector in the reflector can be effected by means of a base generally intended for fixing and centering a lens support.
  • the main reflector may comprise at the front a flange comprising a plurality of pins or centering studs projecting forwards, a lens is mounted in the front face of a housing whose rear face is open and limited in parts. high and low by flanges having orifices arranged to be traversed by the pins of the main reflector, and the additional reflector is secured at its front end, a flange which has orifices arranged in the same manner as those of the rim of the main reflector, so that the pins can engage in these holes and thus ensure the centering and attachment of the additional reflector.
  • a light projector optical module P for a motor vehicle which comprises a reflector 1 of shape type close to an ellipsoid (hereinafter referred to as ellipsoid by conciseness concerns), a light source S placed at a first focus, or internal focal point Fi of the reflector, and a convergent optical means advantageously formed by a convergent lens 2 whose object focus is located in the vicinity of the second focus Fe or external focus of reflector 1, or is confused with Fe.
  • the light source S may be of different types, for example halogen lamp, or xenon discharge lamp, or one or more light-emitting diodes.
  • the optical module P may be a code optical module giving a cut-off beam above a predetermined line, in which case the optical module comprises a cover 3 situated in the vicinity of the focus of the lens 2 and the second focus Fe with an edge greater than substantially at the optical axis XX of the reflector 1. The upper edge of the cover 3-determines the cutting of the beam.
  • the optical module P may also be an optical optical module in which case the cover 3 is removed or the optical module P may be of the bi function type with a retractable cover 3, for example by pivoting about a transverse horizontal axis, for move from function code to the route function or vice versa.
  • the axial dimension L of the optical module 1 corresponds to the distance between the vertical planes tangent to the rear end of the optical module1 and to the open front face of this optical module.
  • an additional reflector 4 with a curved surface, having a focal point substantially coinciding with the internal focal point Fi of the reflector 1, is inserted into the ellipsoid reflector 1 and is fixed thereto, without substantially increasing its dimensions, in particular the depth L.
  • the additional reflector 4 has different parameters from those of the ellipsoid reflector 1 in order to modify the characteristics of the light beam of the optical module.
  • FIG. 5 illustrates an isolux network obtained with a standard road projector comprising only the ellipsoid reflector 1. It appears that the isolux curves in the extreme lateral zones Zd and Zg are relatively pinched because their dimension h in the vertical direction is substantially reduced.
  • the additional reflector 4 of the invention is calculated to modify accordingly the network of isolux curves.
  • Fig. 6 illustrates the network obtained with such additional reflector 4; the light beam is thickened in the zones Zd, Zg which have a height h1 clearly greater than h of FIG. 5.
  • the additional reflector 4 is of elliptical or parabolic type. It is located in the front part of the ellipsoid reflector 1 and forms a ring corresponding to a section of ellipsoid or paraboloid.
  • the terms "front” and “rear” used in the present description are to be considered according to the direction of propagation of the light.
  • the light source S can be oriented in the direction of the optical axis X-X or transversely to this axis.
  • Fig. 1 there is shown several light rays from the source S.
  • the rays i1, i2 which fall on the reflector 1 are reflected so as to pass through the external focus Fe or in the vicinity and out of the lens 2 substantially parallel to the optical axis.
  • the second focus of the reflector 4 is in front of the external focus Fe of the ellipsoid reflector 1.
  • the front edge 4a of the additional reflector 4 is located in the plane of the opening of the reflector 1, or substantially in this plane.
  • the trailing edge 4b may be located in a plane, in particular orthogonal to the X-X axis as illustrated in FIG. 1, or can be formed by a left curve 4bb (FIG. 2) determined according to the modifications to be made to the isolux network.
  • the curve 4bb substantially corresponds to the intersection of the additional reflector 4 with a cylinder of revolution of horizontal axis orthogonal to the optical axis X-X.
  • the dimension of the additional reflector 4 of FIG. 2, in a direction parallel to the optical axis is minimal in the horizontal plane passing through the optical axis and maximum in the vertical plane passing through this optical axis.
  • the attachment of the additional reflector 4 in the reflector 1 can be effected as illustrated in FIG. 3, using a base generally provided for fixing and centering the support of the lens 2.
  • the reflector 1 comprises at the front a flange B molded in one piece with the reflector, for example with a rectangular contour, which surrounds the opening of the reflector 1, in a plane orthogonal to the optical axis.
  • This flange B comprises three pawns or pins D projecting forward, for example a pin in the vicinity of each upper lateral end and a pawn in the lower central part.
  • the lens 2 is mounted in the front face of a housing 5 whose rear face is open and limited in upper and lower parts by vertical flanges 5a, 5b having orifices E, respectively two orifices E on the upper flange 5a and a central hole E in the lower flange 5b.
  • These orifices E are arranged so as to be traversed by the pins D to ensure the centering and the fixing of the housing 5 and the lens 2.
  • the additional reflector 4 may be secured, at its front end, with a flange G located in a plane orthogonal to the optical axis, molded in one piece with the reflector 4 and whose outer contour corresponds to that of the flange B
  • This rim G has three orifices E1 arranged in the same manner as the orifices E so that the pins D can engage in the orifices E1 and thus ensure the centering and the fixing of the additional reflector 4 inserted into the reflector 1.
  • the flange G is sandwiched between flanges B and 5a, 5b.
  • the additional reflector 4 may be made of molded plastic whose inner surface is reflectorized, for example by aluminization, or be made of cast aluminum.
  • the thickness of the additional reflector 4 is reduced, for example from 5 to 7 tenths of a millimeter.
  • a progressive decrease in the thickness of the reflector 4 in the rear area 4b is provided so that the surface reflective internal reflector 4 is connected almost tangentially to the inner surface of the reflector 1. It can thus ensure a recovery of the isolux curves of the bottom portion of the reflector 1 and the additional reflector 4.
  • the optical module according to the invention constitutes a standard elliptical module, in particular code, with scalable performance of constant dimensions.
  • the evolution of the performances is obtained by a simple insertion of the additional reflector 4 in a reflector 1 which is not modified elsewhere.
  • the positioning of the flexible part, constituted by the additional reflector 4, with respect to the original surface of the reflector 1 is not detrimental, since the recovered light contributes mainly to the width of the beam, when the two surfaces make up the whole of the code module.
  • the projector according to the invention incorporating one or more modules according to the invention, and the modules themselves, are thus easily adjustable without requiring significant investments, and provides a wide photometric choice while maintaining a standard elliptical portion.
  • the bottom of the reflector contributes to the range of the light beam while the edge constituted by the additional reflector 4 contributes mainly to the width of the light beam.
  • the additional reflector 4 may be substantially conical. This additional flexible reflector removes a quantity of light from the standard part to place it judiciously in the photometry of the isolux.
  • the example described with reference to FIG. 1 corresponds to a reflector base constituted by the standard reflector 1 and a flexible edge constituted by the ring 4. This arrangement contributes to thicken the light beam in width.
  • An elliptical module or projector of standard appearance, with an inner modular surface 4 according to the invention, makes it possible to obtain a different beam according to the definition of this surface 4 and the desired shape for the light beam, without requiring too much investment. important.
  • the changes in the light beam may consist of thickening, thinning, or widening, or shrinking, or making this bundle deeper.
  • Fig. 4 is a perspective view of the elements of the projector according to the invention, without its housing.
  • the cache was not represented; a cover for a European code beam would have an inverted V-shaped top edge with a horizontal side and another side inclined downwards at 15 ° on the horizontal. The image of this edge provided by the lens determines the cutoff of the code beam.
  • FIG. 7 represents the network of isolux produced by the only additional reflector 4, while FIG. 8 represents the network of isolux produced by the single bottom portion of the main reflector ellipsoid 1.

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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)
  • Lens Barrels (AREA)
  • Control Of Electric Motors In General (AREA)
  • Optical Couplings Of Light Guides (AREA)
EP06291038A 2005-06-29 2006-06-23 Optisches Modul für Kraftfahrzeug Not-in-force EP1739345B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0506614A FR2887959B1 (fr) 2005-06-29 2005-06-29 Projecteur lumineux pour vehicule automobile

Publications (2)

Publication Number Publication Date
EP1739345A1 true EP1739345A1 (de) 2007-01-03
EP1739345B1 EP1739345B1 (de) 2010-03-31

Family

ID=35664068

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06291038A Not-in-force EP1739345B1 (de) 2005-06-29 2006-06-23 Optisches Modul für Kraftfahrzeug

Country Status (4)

Country Link
EP (1) EP1739345B1 (de)
AT (1) ATE462927T1 (de)
DE (1) DE602006013227D1 (de)
FR (1) FR2887959B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3012575A1 (fr) * 2013-10-24 2015-05-01 Peugeot Citroen Automobiles Sa Module optique compact pour vehicule
FR3021928A1 (fr) * 2014-06-10 2015-12-11 Renault Sas Dispositif d'eclairage exterieur pour vehicule automobile
WO2016066908A1 (fr) * 2014-10-31 2016-05-06 Peugeot Citroen Automobiles Sa Module optique compact pour véhicule

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB379568A (en) * 1930-11-26 1932-09-01 Lucien Desire Reymond Improvements in search-lights
EP0843126A2 (de) * 1996-11-14 1998-05-20 Stanley Electric Co., Ltd. Projektions- Scheinwerfer
EP0950847A2 (de) * 1998-04-17 1999-10-20 Stanley Electric Co., Ltd. Lampe
US6086231A (en) * 1997-01-10 2000-07-11 Koito Manufacturing Co., Ltd. Vehicle lamp
EP1195552A2 (de) * 2000-10-06 2002-04-10 Stanley Electric Co., Ltd. Scheinwerfer
US20050024880A1 (en) * 2001-10-17 2005-02-03 Holger Moench Illumination unit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB379568A (en) * 1930-11-26 1932-09-01 Lucien Desire Reymond Improvements in search-lights
EP0843126A2 (de) * 1996-11-14 1998-05-20 Stanley Electric Co., Ltd. Projektions- Scheinwerfer
US6086231A (en) * 1997-01-10 2000-07-11 Koito Manufacturing Co., Ltd. Vehicle lamp
EP0950847A2 (de) * 1998-04-17 1999-10-20 Stanley Electric Co., Ltd. Lampe
EP1195552A2 (de) * 2000-10-06 2002-04-10 Stanley Electric Co., Ltd. Scheinwerfer
US20050024880A1 (en) * 2001-10-17 2005-02-03 Holger Moench Illumination unit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3012575A1 (fr) * 2013-10-24 2015-05-01 Peugeot Citroen Automobiles Sa Module optique compact pour vehicule
FR3021928A1 (fr) * 2014-06-10 2015-12-11 Renault Sas Dispositif d'eclairage exterieur pour vehicule automobile
WO2016066908A1 (fr) * 2014-10-31 2016-05-06 Peugeot Citroen Automobiles Sa Module optique compact pour véhicule

Also Published As

Publication number Publication date
FR2887959A1 (fr) 2007-01-05
EP1739345B1 (de) 2010-03-31
FR2887959B1 (fr) 2007-09-28
DE602006013227D1 (de) 2010-05-12
ATE462927T1 (de) 2010-04-15

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