EP0171646A1 - Motor vehicle headlamp for dipped light or fog light - Google Patents

Motor vehicle headlamp for dipped light or fog light Download PDF

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Publication number
EP0171646A1
EP0171646A1 EP85109019A EP85109019A EP0171646A1 EP 0171646 A1 EP0171646 A1 EP 0171646A1 EP 85109019 A EP85109019 A EP 85109019A EP 85109019 A EP85109019 A EP 85109019A EP 0171646 A1 EP0171646 A1 EP 0171646A1
Authority
EP
European Patent Office
Prior art keywords
lens
light
ground
headlight according
converging lens
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.)
Ceased
Application number
EP85109019A
Other languages
German (de)
French (fr)
Inventor
Xiem Dipl.-Ing. Guyen
Christian Dipl.-Ing. Liètar
Gerhard Dipl.-Ing. Lindae
Richard Loewe
Peter Perthus
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0171646A1 publication Critical patent/EP0171646A1/en
Ceased 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/265—Composite lenses; Lenses with a patch-like shape
    • 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
    • F21S41/40—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

Definitions

  • the invention relates to a headlight for low beam or fog light of motor vehicles according to the preamble of claim 1.
  • the light-dark boundary which is created by imaging the diaphragm edge, has a color fringe formed by the color decomposition of the white light.
  • a low beam or fog light with such a color fringe does not correspond to the legal regulations on motor vehicle headlights, because only white light is permitted for this; this could be achieved with a three-part lens that has two converging lenses and a diffusing lens with spherically ground lens surfaces.
  • the three-part design of the lens and the total of six ground lens surfaces require a large amount of technical work to manufacture the headlamp.
  • the problem of the technical production outlined in the aforementioned prior art is solved in a simple manner in that the Objective consists of only two lenses and the required aspherical lens surface is already created by the molding tool during the pressing process.
  • the two spherical surfaces of the scattering lens and the spherical surface of the converging lens can be both pressed and ground, with the grinding of any spherical surface which is part of a spherical surface being simple.
  • the pressed aspherical surface of the converging lens can be calculated and manufactured in such a way that a light-dark boundary that is too high in contrast is avoided and sufficient illumination of the room to be illuminated is achieved; one increases the driving safety of the motor vehicle driver and the other makes the traffic signs more clearly recognizable.
  • a headlight for low beam or fog light of motor vehicles has a reflector 10, the vertical meridian section 11 and horizontal meridian section 12 of which are higher-order intersection curves, for example ellipses, parabolas or conic section-like curves.
  • a luminous element 13 is arranged in the region of the optical axis 14 of the headlight, and in the direction of the rays reflected by the reflector 10, ie in front of the light exit opening 15 of the
  • the reflector 10 is an aperture 16, the optically effective edge 17 forms the light-dark boundary of the light beam.
  • the diffusion lens 18 has a flat surface 20 and a spherical surface 21 which is part of a spherical surface. Both surfaces 20, 21 are created by grinding a pressed blank.
  • the converging lens 19 consists of pressed glass, the aspherical surface 23 of which has already been pressed, ie does not require a subsequent grinding process; their spherical surface 22, however, is ground.
  • the concave surface 21 of the diffusing lens 18 and the convex surface 22 of the converging lens 19 are arranged adjacent.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

The headlamp has a reflector (10), the vertical and horizontal meridian sections (11, 12) of which are higher-order intersection curves, and a diaphragm (17) forming the rough light beam. The objective is composed of a ground spherical dispersing lens (18) and of an aspherical collecting lens (19), the aspherical surface (23) of which is already completed during the pressing of the lens and does not require any further grinding process. <IMAGE>

Description

Stand der TechnikState of the art

Die Erfindung betrifft einen Scheinwerfer für Abblendlicht oder Nebellicht von Kraftfahrzeugen nach der Gattung des Anspruchs 1. Die Helldunkelgrenze, die durch die Abbildung der Blendenkante entsteht, weist einen durch die Farbzerlegung des weißen Lichtes gebildeten Farbsaum auf. Ein Abblendlicht oder Nebellicht mit einem derartigen Farbsaum entspricht jedoch nicht den Gesetzesvorschriften über Kraftfahrzeug-Scheinwerfer, weil hierfür nur weißes Licht zugelassen ist; dieses ließe sich mit einem dreiteiligen Objektiv verwirklichen, daß zwei Sammellinsen und eine Streulinse mit sphärisch geschliffenen Linsenflächen aufweist. Die Dreiteiligkeit des Objektivs und die insgesamt sechs geschliffenen Linsenflächen erfordern jedoch einen großen technischen Herstellaufwahd des Scheinwerfers.The invention relates to a headlight for low beam or fog light of motor vehicles according to the preamble of claim 1. The light-dark boundary, which is created by imaging the diaphragm edge, has a color fringe formed by the color decomposition of the white light. A low beam or fog light with such a color fringe does not correspond to the legal regulations on motor vehicle headlights, because only white light is permitted for this; this could be achieved with a three-part lens that has two converging lenses and a diffusing lens with spherically ground lens surfaces. However, the three-part design of the lens and the total of six ground lens surfaces require a large amount of technical work to manufacture the headlamp.

Vorteile der ErfindungAdvantages of the invention

Mit dem Scheinwerfer für Abblendlicht oder Nebellicht von Kraftfahrzeugen nach der Erfindung wird das im vorerwähnten Stand der Technik dargelegte Problem des technischen Herstellaufwandes in einfacher Weise dadurch gelöst, daß das Objektiv nur aus zwei Linsen besteht und die erforderliche asphärische Linsenfläche bereits durch das Formwerkzeug beim Preßvorgang entsteht. Die beiden sphärischen Flächen der Streulinse und die sphärische Fläche der Sammellinse können sowohl gepreßt als auch geschliffen sein, wobei sich das Schleifen jeder sphärischen Fläche, die Teil einer Kugeloberfläche ist, einfach gestaltet,With the headlamp for low beam or fog light of motor vehicles according to the invention, the problem of the technical production outlined in the aforementioned prior art is solved in a simple manner in that the Objective consists of only two lenses and the required aspherical lens surface is already created by the molding tool during the pressing process. The two spherical surfaces of the scattering lens and the spherical surface of the converging lens can be both pressed and ground, with the grinding of any spherical surface which is part of a spherical surface being simple.

In vorteilhafter Weise kann die gepreßte asphärische Fläche der Sammellinse in der Weise berechnet und hergestellt werden, daß eine zu kontrastreiche Helldunkelgrenze vermieden und eine genügende Aufhellung des auszuleuchtenden Raumes erreicht wird; das eine erhöht die Fahrsicherheit des Kraftfahrzeugführers und das andere läßt die Verkehrsschilder eindeutiger erkennen.In an advantageous manner, the pressed aspherical surface of the converging lens can be calculated and manufactured in such a way that a light-dark boundary that is too high in contrast is avoided and sufficient illumination of the room to be illuminated is achieved; one increases the driving safety of the motor vehicle driver and the other makes the traffic signs more clearly recognizable.

Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen beschrieben.Advantageous developments of the invention are described in the subclaims.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der Figurenbeschreibung näher erläutert. Beschreibung des AusführungsbeispielesAn embodiment of the invention is shown in the drawing and explained in more detail in the description of the figures. Description of the embodiment

Ein Scheinwerfer für Abblendlicht oder Nebellicht von Kraftfahrzeugen hat einen Reflektor 10, dessen vertikaler Meridianschnitt 11 und horizontaler Meridianschnitt 12 Schnittkurven höherer Ordnung sind, beispielsweise Ellipsen,-Parabeln oder kegelschnittähnliche Kurven. Ein Leuchtkörper 13 ist im Bereich der optischen Achse 14 des Scheinwerfers angeordnet, und in Richtung der vom Reflektor 10 reflektierten Strahlen, d.h. vor der Lichtaustrittsöffnung 15 des Reflektors 10 befindet sich eine Blende 16, deren optisch wirksame Kante 17 die Helldunkelgrenze des Lichtbündels bildet.A headlight for low beam or fog light of motor vehicles has a reflector 10, the vertical meridian section 11 and horizontal meridian section 12 of which are higher-order intersection curves, for example ellipses, parabolas or conic section-like curves. A luminous element 13 is arranged in the region of the optical axis 14 of the headlight, and in the direction of the rays reflected by the reflector 10, ie in front of the light exit opening 15 of the The reflector 10 is an aperture 16, the optically effective edge 17 forms the light-dark boundary of the light beam.

Ebenfalls in Richtung der reflektierten Lichtstrahlen und vor der Blende 16 ist ein von einer Streulinse 18 und einer Sammellinse 19 gebildetes Objektiv angeordnet. Die Streulinse 18 hat eine Planfläche 20 und eine sphärische Fläche 21, die Teil einer Kugeloberfläche ist. Beide Flächen 20, 21 sind durch Schleifen eines gepreßten Rohlings entstanden. Die Sammellinse 19 besteht aus Preßglas, deren asphärische Fläche 23 bereits fertig gepreßt ist, also keinen nachträglichen Schleifvorgang erfordert; deren sphärische Fläche 22 hingegen ist geschliffen. Die konkave Fläche 21 der Streulinse 18 und die konvexe Fläche 22 der Sammellinse 19 sind benachbart angeordnet.Also in the direction of the reflected light rays and in front of the diaphragm 16 is an objective formed by a diverging lens 18 and a converging lens 19. The diffusion lens 18 has a flat surface 20 and a spherical surface 21 which is part of a spherical surface. Both surfaces 20, 21 are created by grinding a pressed blank. The converging lens 19 consists of pressed glass, the aspherical surface 23 of which has already been pressed, ie does not require a subsequent grinding process; their spherical surface 22, however, is ground. The concave surface 21 of the diffusing lens 18 and the convex surface 22 of the converging lens 19 are arranged adjacent.

Erfindungswesentlich ist, daß die asphärische Fläche 23 des Objektivs (18, 19) fertig gepreßt ist und mithin keinen aufwendigen technischen Schleifvorgang mehr bedarf; alle Planflächen und/oder sphärischen Flächen können sowohl fertig gepreßt oder geschliffen sein, wobei der diesbezügliche Schleifvorgang sich technisch einfach darstellen läßt.It is essential to the invention that the aspherical surface 23 of the objective (18, 19) is completely pressed and therefore no longer requires a complex technical grinding process; all flat surfaces and / or spherical surfaces can be either completely pressed or ground, the grinding process in this regard being technically simple to represent.

Claims (6)

1. Scheinwerfer für Abblendlicht oder Nebellicht von Kraftfahrzeugen, mit einem Reflektor, dessen vertikaler und horizontaler Meridianschnitt Kurven höherer Ordnung sind und der die von einem Leuchtkörper erzeugten Strahlen reflektiert, und mit einer in Richtung der reflektierten Strahlen angeordneten Blende, deren optisch wirksame Kantedie Helldunkelgrenze des Lichtbündels bildet, und mit einem in Strahlenrichtung vor der Blende angeordneten Objektiv, das die reflektierten Strahlen zum Lichtbündel formt, dadurch gekennzeichnet, daß eine sphärische Streulinse (18) und eine asphärische Sammellinse (19) das Objektiv bilden und daß mindestens die asphärische Fläche (23) der Sammellinse (19) fertiggepreßt und nicht geschliffen ist.1.Headlights for low beam or fog light of motor vehicles, with a reflector whose vertical and horizontal meridian section are curves of higher order and which reflects the rays generated by a luminous element, and with an aperture arranged in the direction of the reflected rays, the optically effective edge of which is the chiaroscuro limit Forms light bundle, and with an objective arranged in the beam direction in front of the diaphragm, which forms the reflected rays into the light bundle, characterized in that a spherical scattering lens (18) and an aspherical converging lens (19) form the objective and that at least the aspherical surface (23 ) the converging lens (19) is pressed and not ground. 2. Scheinwerfer nach Anspruch J, dadurch gekennzeichnet, daß die andere Fläche (22) der Sammellinse (19) geschliffen ist.2. Headlight according to claim J, characterized in that the other surface (22) of the converging lens (19) is ground. 3. Scheinwerfer nach Anspruch oder 2, dadurch gekennzeichnet, daß die beiden Flächen (2J, 22) der Streulinse (18) fertig gepreßt und nicht geschliffen sind.3. Headlamp according to claim or 2, characterized in that the two surfaces (2J, 22) of the diffusing lens (18) are finished pressed and are not ground. 4. Scheinwerfer nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß mindestens eine der beiden Flächen (20, 21) der Streulinse (18) geschliffen ist.4. Headlight according to claim 1 or 2, characterized in that at least one of the two surfaces (20, 2 1) of the diffusing lens (18) is ground. 5. Scheinwerfer nach einem der vorgenannten Ansprüche, dadurch gekennzeichnet, daß die Streulinse (18) aus Kunststoff besteht.-5. Headlight according to one of the preceding claims, characterized in that the scattering lens (18) consists of plastic. 6. Scheinwerfer nach einem der vorgenannten Ansprüche, dadurch gekennzeichnet, daß das Objektiv (18, 19), insbesondere die asphärische Fläche (23) der Sammellinse (19), derart berechnet ist, daß die die Halldunkelgrenze abbildende Blende (16) unscharf abgebildet ist und der Bereich oberhalb der Helldunkelgrenze aufgehellt ist.6. Headlight according to one of the preceding claims, characterized in that the lens (18, 19), in particular the aspherical surface (23) of the converging lens (19), is calculated in such a way that the diaphragm (16) representing the Hall dark boundary is blurred and the area above the light-dark boundary is brightened.
EP85109019A 1984-08-17 1985-07-19 Motor vehicle headlamp for dipped light or fog light Ceased EP0171646A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843430273 DE3430273A1 (en) 1984-08-17 1984-08-17 HEADLIGHTS FOR LOW BEAM OR FOG LIGHTS OF MOTOR VEHICLES
DE3430273 1984-08-17

Publications (1)

Publication Number Publication Date
EP0171646A1 true EP0171646A1 (en) 1986-02-19

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Application Number Title Priority Date Filing Date
EP85109019A Ceased EP0171646A1 (en) 1984-08-17 1985-07-19 Motor vehicle headlamp for dipped light or fog light

Country Status (3)

Country Link
EP (1) EP0171646A1 (en)
JP (1) JPS6149302A (en)
DE (1) DE3430273A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2306074A3 (en) * 2009-10-05 2013-06-12 Automotive Lighting Reutlingen GmbH Motor vehicle headlight with a semiconductor source, light module with a primary lens and a secondary lens
EP2306073A3 (en) * 2009-10-05 2013-06-12 Automotive Lighting Reutlingen GmbH Light module for a lighting device of a motor vehicle
US8556482B2 (en) 2007-07-26 2013-10-15 Docter Optics Se Method for producing a headlamp lens for a motor-vehicle headlamp
EP2431658A3 (en) * 2010-09-16 2014-01-08 Automotive Lighting Reutlingen GmbH Colour correcting projection lens for a light module of a motor vehicle headlamp
DE102011004086C5 (en) * 2011-02-14 2016-07-14 Automotive Lighting Reutlingen Gmbh Method for producing a color-correcting projection optics
CN106322271A (en) * 2015-07-02 2017-01-11 株式会社小糸制作所 Vehicle lamp
JP2018005219A (en) * 2016-07-08 2018-01-11 ウン，ヒョン−ス Plastic composite lens for headlight

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT405212B (en) * 1997-01-15 1999-06-25 Photonic Optische Geraete Gmbh OPTICAL ELEMENT
JP5510805B2 (en) * 2010-03-01 2014-06-04 スタンレー電気株式会社 Projector headlamps for motorcycles
DE102010051597B4 (en) 2010-11-16 2017-05-11 Automotive Lighting Reutlingen Gmbh Optical lens element, light module for a motor vehicle headlight with such a lens element and motor vehicle headlight with such a light module

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191503020A (en) * 1915-02-24 1916-02-03 Arthur Knobloch Improvements in or relating to Lenses.
FR44757E (en) * 1934-04-20 1935-04-06 Non-glare headlight system for automobiles and other applications
FR992756A (en) * 1944-09-09 1951-10-23 Advanced projector
LU43789A1 (en) * 1963-05-21 1964-05-21
US3598989A (en) * 1969-01-02 1971-08-10 Sylvania Electric Prod Automotive headlight
GB1248600A (en) * 1967-12-29 1971-10-06 Gte Sylvania Inc Automobile headlights
US4240701A (en) * 1978-06-12 1980-12-23 M.U. Engineering & Manufacturing, Inc. All plastic projection lens assembly with aspheric surface

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191503020A (en) * 1915-02-24 1916-02-03 Arthur Knobloch Improvements in or relating to Lenses.
FR44757E (en) * 1934-04-20 1935-04-06 Non-glare headlight system for automobiles and other applications
FR992756A (en) * 1944-09-09 1951-10-23 Advanced projector
LU43789A1 (en) * 1963-05-21 1964-05-21
GB1248600A (en) * 1967-12-29 1971-10-06 Gte Sylvania Inc Automobile headlights
US3598989A (en) * 1969-01-02 1971-08-10 Sylvania Electric Prod Automotive headlight
US4240701A (en) * 1978-06-12 1980-12-23 M.U. Engineering & Manufacturing, Inc. All plastic projection lens assembly with aspheric surface

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8556482B2 (en) 2007-07-26 2013-10-15 Docter Optics Se Method for producing a headlamp lens for a motor-vehicle headlamp
EP2306074A3 (en) * 2009-10-05 2013-06-12 Automotive Lighting Reutlingen GmbH Motor vehicle headlight with a semiconductor source, light module with a primary lens and a secondary lens
EP2306073A3 (en) * 2009-10-05 2013-06-12 Automotive Lighting Reutlingen GmbH Light module for a lighting device of a motor vehicle
EP2431658A3 (en) * 2010-09-16 2014-01-08 Automotive Lighting Reutlingen GmbH Colour correcting projection lens for a light module of a motor vehicle headlamp
DE102011004086C5 (en) * 2011-02-14 2016-07-14 Automotive Lighting Reutlingen Gmbh Method for producing a color-correcting projection optics
CN106322271A (en) * 2015-07-02 2017-01-11 株式会社小糸制作所 Vehicle lamp
US10234096B2 (en) 2015-07-02 2019-03-19 Koito Manufacturing Co., Ltd. Vehicle lamp
CN106322271B (en) * 2015-07-02 2019-03-22 株式会社小糸制作所 Lamps apparatus for vehicle
JP2018005219A (en) * 2016-07-08 2018-01-11 ウン，ヒョン−ス Plastic composite lens for headlight

Also Published As

Publication number Publication date
DE3430273A1 (en) 1986-02-27
JPS6149302A (en) 1986-03-11

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Inventor name: PERTHUS, PETER

Inventor name: LINDAE, GERHARD, DIPL.-ING.

Inventor name: LOEWE, RICHARD

Inventor name: LIETAR, CHRISTIAN, DIPL.-ING.

Inventor name: GUYEN, XIEM, DIPL.-ING.