EP0645578A2 - Scheinwerfer mit glatter Scheibe, insbesondere für Kraftfahrzeuge, und Verfahren zum Herstellen des Reflektors eines solchen Scheinwerfers - Google Patents

Scheinwerfer mit glatter Scheibe, insbesondere für Kraftfahrzeuge, und Verfahren zum Herstellen des Reflektors eines solchen Scheinwerfers Download PDF

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Publication number
EP0645578A2
EP0645578A2 EP94402109A EP94402109A EP0645578A2 EP 0645578 A2 EP0645578 A2 EP 0645578A2 EP 94402109 A EP94402109 A EP 94402109A EP 94402109 A EP94402109 A EP 94402109A EP 0645578 A2 EP0645578 A2 EP 0645578A2
Authority
EP
European Patent Office
Prior art keywords
substitution
reflector
zones
headlamp
network
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
EP94402109A
Other languages
English (en)
French (fr)
Other versions
EP0645578B1 (de
EP0645578A3 (en
Inventor
François Lopez
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 EP0645578A2 publication Critical patent/EP0645578A2/de
Publication of EP0645578A3 publication Critical patent/EP0645578A3/fr
Application granted granted Critical
Publication of EP0645578B1 publication Critical patent/EP0645578B1/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
    • 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

Definitions

  • the invention relates to a headlamp, in particular a headlamp for a motor vehicle.
  • a projector of the type comprising a light source such as a filament lamp generally devoid of a cup, a reflector having a surface chosen to form, in an axial and horizontal direction of illumination, images of the source according to a distribution determined, and a closing window.
  • a light source such as a filament lamp generally devoid of a cup
  • a reflector having a surface chosen to form, in an axial and horizontal direction of illumination, images of the source according to a distribution determined, and a closing window.
  • it may be an area defined analytically so as to form images of the source, all of the points of which are situated below a predetermined cut.
  • the documents FR-A-2 536 502 and FR-A-2 536 503 describe headlights of this type, which define, respectively, a passing beam and an anti-fog beam essentially by the particular conformation of the surface of the reflector.
  • This type of projector avoids the recourse not only to a cup or screening screen, but also to a highly deflecting lens and thus provides good uniformity of spreading of the beam, in particular in the vertical direction.
  • One of the objects of the invention is to provide a headlamp making it possible to produce a standardized light beam made homogeneous only by the reflector, in order to be able to use a smooth lens or provided with non-functional streaks, that is to say purely decorative and without optical role.
  • the invention provides for making the streaks directly on the reflector of the projector by grouping them by zones according to the result to be achieved, these zones being defined in the same way as those found on the classic deviating ice.
  • Patent GB-A-435,946 describes a headlamp for overcoming the deflecting streaks of a lens, and consisting of a stack of horizontal paraboloid slices; each section of this juxtaposition constitutes an independent reflector providing a deviation of the strictly parabolic type.
  • the invention is particularly advantageously applied to a reflecting surface defined analytically so as to form images of the source, all of the points of which are situated below a predetermined cut-off.
  • the substitution surfaces may be such that two adjacent substitution surfaces are connected either without a solution of continuity along their common edge, or else by means of a draft along their common edge.
  • the substitution surfaces are adjoining surfaces which are continuously connected in horizontal direction to each other along their common edge.
  • Figure 1 is a schematic sectional view of a projector according to the invention.
  • FIG. 2 shows the manner in which the streak zones are distributed over the surface of the reflector as a function of a plane definition of the network of deflecting zones.
  • FIG. 3 is a front view of the planar network of deflecting zones of FIG. 2.
  • Figure 4 is a partial view, in horizontal section, of the surface of the reflector of Figures 1 and 2, in a first embodiment.
  • Figure 5 is equivalent to Figure 4, for an alternative embodiment of the invention.
  • Figure 6 is homologous to Figure 3, for a second embodiment.
  • a headlamp for a motor vehicle comprising a light source 10, in this case a filament lamp, a reflector or mirror 20 of the aforementioned type with an analytically defined surface, possibly truncated by two half-planes 21 and 22, and a closing glass 30.
  • the light source 10 does not have any cup or screening screen, the cut-off being defined by the mere fact of the shape of the reflector 20.
  • the assembly produces a light beam towards the front of the vehicle, in a direction of illumination ⁇ axial and horizontal.
  • the filament can be replaced by the arc of a discharge lamp.
  • the closing glass 30 is essentially smooth or simply provided with decorative ridges, without optical role, the homogenization and spreading of the beam in the horizontal direction being carried out only by the reflector 20.
  • a network of streak zones is defined as a function of the desired result, in a manner identical to that which would have been defined on a closing glass.
  • each of the zones 41 is projected onto the surface 23 of the reflector 20, thus defining thereon a homologous zone 24 of curvilinear contour (the zones 41 have a polygonal contour) , and a substitution surface forming a streak is formed at the location of each zone 24 of the reflector, this substitution surface 24 being defined with respect to the projection surface (analytically defined surface) 23 by a differential gap ⁇ , in a horizontal plane, corresponding to the profile that the homologous streak would have if it had been formed on a closing glass.
  • the discontinuities resulting from the horizontal transition zones are reflected on the illumination diagram by horizontal lines generating glare, which are further amplified when it is necessary to coat the mirror d '' a protective varnish, because it tends to deposit irregularly and to concentrate more or less unpredictably around the discontinuities.
  • the use of progressive streaks in particular makes it possible to overcome this difficulty.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Optical Elements Other Than Lenses (AREA)
EP94402109A 1993-09-24 1994-09-22 Scheinwerfer mit glatter Scheibe, insbesondere für Kraftfahrzeuge, und Verfahren zum Herstellen des Reflektors eines solchen Scheinwerfers Expired - Lifetime EP0645578B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9311403 1993-09-24
FR9311403A FR2710393B1 (fr) 1993-09-24 1993-09-24 Projecteur à glace lisse, notamment pour véhicule automobile, et procédé de fabrication du réflecteur d'un tel projecteur.

Publications (3)

Publication Number Publication Date
EP0645578A2 true EP0645578A2 (de) 1995-03-29
EP0645578A3 EP0645578A3 (en) 1995-04-26
EP0645578B1 EP0645578B1 (de) 1999-03-10

Family

ID=9451212

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94402109A Expired - Lifetime EP0645578B1 (de) 1993-09-24 1994-09-22 Scheinwerfer mit glatter Scheibe, insbesondere für Kraftfahrzeuge, und Verfahren zum Herstellen des Reflektors eines solchen Scheinwerfers

Country Status (5)

Country Link
US (1) US5567044A (de)
EP (1) EP0645578B1 (de)
JP (1) JP3579930B2 (de)
DE (1) DE69416922T2 (de)
FR (1) FR2710393B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19747314A1 (de) * 1996-11-08 1998-05-14 Valeo Vision Kraftfahrzeugscheinwerfer mit einer Entladungslampe mit Abdeckelementen und einem Mehrzonen-Reflektor
US5826964A (en) * 1996-01-29 1998-10-27 Autopal S.R.O. Headlamp with complex reflector

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2760068B1 (fr) * 1997-02-21 1999-05-14 Valeo Vision Projecteur de vehicule automobile a miroir a zones juxtaposees lateralement, et procede de fabrication d'un tel miroir
FR2763666B1 (fr) * 1997-05-23 1999-08-13 Valeo Vision Projecteur de vehicule automobile a miroir generateur de faisceau large et a glace striee
FR2774149B1 (fr) 1998-01-28 2000-04-14 Valeo Vision Projecteur de vehicule automobile, comportant une source transversale et apte a engendrer un faisceau a coupure non rectiligne
FR2774150B1 (fr) 1998-01-28 2000-04-14 Valeo Vision Projecteur a source transversale pour vehicule automobile, susceptilble d'emettre un faisceau a coupure nette
FR2774151B1 (fr) 1998-01-28 2000-04-14 Valeo Vision Projecteur de vehicule automobile a source lumineuse virtuelle
FR2782148B1 (fr) 1998-08-10 2001-02-09 Valeo Vision Projecteur de vehicule automobile pourvu d'une lampe a deux filaments et d'un miroir perfectionnes
FR2782549B1 (fr) 1998-08-18 2001-03-02 Valeo Vision Projecteur de vehicule automobile muni de moyens pour emettre selectivement un faisceau pour circulation a droite, ou a gauche
JP4031600B2 (ja) * 1999-10-01 2008-01-09 株式会社小糸製作所 車両用灯具の反射鏡の反射面決定方法
FR2800439B1 (fr) 1999-10-29 2002-02-15 Valeo Vision Projet de vehicule, notamment projecteur de croisement, a encombrement reduit
FR2804495B1 (fr) 2000-01-31 2002-06-07 Valeo Vision Projecteur de vehicule automobile, comportant une source transversale et apte a engendrer un faisceau a coupure non rectiligne
FR2822929B1 (fr) 2001-03-30 2003-12-12 Valeo Vision Projecteur a encombrement reduit pour vehicule automobile

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1732884A (en) * 1927-02-14 1929-10-22 Indiana Lamp Corp Reflector for headlights
GB435946A (en) * 1933-07-13 1935-10-02 Machal Projecteurs Improvements in or relating to machines for the manufacture of corrugated reflectorsespecially for automobile headlights
FR2460442A1 (fr) * 1979-06-29 1981-01-23 Cibie Projecteurs Nouvelle structure de projecteur, notamment de projecteur d'automobile
EP0084934A1 (de) * 1982-01-16 1983-08-03 LUCAS INDUSTRIES public limited company Lampenreflektor
FR2536502A1 (fr) * 1982-11-19 1984-05-25 Cibie Projecteurs Projecteur de croisement pour vehicule automobile

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE435946C (de) * 1925-12-24 1926-10-20 Mikron G M B H Zeichenvorrichtung mit zwei hintereinander geschalteten Parallelfuehrungsarmen
FR986492A (fr) * 1949-03-09 1951-08-01 Holophane Perfectionnements aux réflecteurs à surface interne réfléchissante
US2999924A (en) * 1957-09-10 1961-09-12 Mottier Felix Anti-fog lighting projector
US3511983A (en) * 1967-04-10 1970-05-12 Corning Glass Works Lighting device for dental and surgical procedures
US4087682A (en) * 1976-03-15 1978-05-02 Kolodziej Henry W Illuminating device
JP2604646B2 (ja) * 1991-01-28 1997-04-30 株式会社小糸製作所 車輌用前照灯の反射鏡

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1732884A (en) * 1927-02-14 1929-10-22 Indiana Lamp Corp Reflector for headlights
GB435946A (en) * 1933-07-13 1935-10-02 Machal Projecteurs Improvements in or relating to machines for the manufacture of corrugated reflectorsespecially for automobile headlights
FR2460442A1 (fr) * 1979-06-29 1981-01-23 Cibie Projecteurs Nouvelle structure de projecteur, notamment de projecteur d'automobile
EP0084934A1 (de) * 1982-01-16 1983-08-03 LUCAS INDUSTRIES public limited company Lampenreflektor
FR2536502A1 (fr) * 1982-11-19 1984-05-25 Cibie Projecteurs Projecteur de croisement pour vehicule automobile

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5826964A (en) * 1996-01-29 1998-10-27 Autopal S.R.O. Headlamp with complex reflector
DE19747314A1 (de) * 1996-11-08 1998-05-14 Valeo Vision Kraftfahrzeugscheinwerfer mit einer Entladungslampe mit Abdeckelementen und einem Mehrzonen-Reflektor
US6017138A (en) * 1996-11-08 2000-01-25 Valeo Vision Motor vehicle headlamp having a discharge lamp with masks and a multi-zone reflector
DE19747314B4 (de) * 1996-11-08 2014-05-22 Valeo Vision Kraftfahrzeugscheinwerfer mit einer Entladungslampe mit Abdeckelementen und einem Mehrzonen-Reflektor

Also Published As

Publication number Publication date
JPH07169304A (ja) 1995-07-04
JP3579930B2 (ja) 2004-10-20
EP0645578B1 (de) 1999-03-10
DE69416922D1 (de) 1999-04-15
DE69416922T2 (de) 1999-07-22
FR2710393B1 (fr) 1995-12-15
US5567044A (en) 1996-10-22
FR2710393A1 (fr) 1995-03-31
EP0645578A3 (en) 1995-04-26

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