EP0094519B1 - Non dazzling vehicle headlamp - Google Patents

Non dazzling vehicle headlamp Download PDF

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Publication number
EP0094519B1
EP0094519B1 EP83103844A EP83103844A EP0094519B1 EP 0094519 B1 EP0094519 B1 EP 0094519B1 EP 83103844 A EP83103844 A EP 83103844A EP 83103844 A EP83103844 A EP 83103844A EP 0094519 B1 EP0094519 B1 EP 0094519B1
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EP
European Patent Office
Prior art keywords
lens
reflector
vehicle headlight
prism
headlight according
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
Application number
EP83103844A
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German (de)
French (fr)
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EP0094519A3 (en
EP0094519A2 (en
Inventor
Hans-Otto Dr. Ernst
Wilhelm Röhling
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Hella GmbH and Co KGaA
Original Assignee
Hella KGaA Huek and Co
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Publication date
Application filed by Hella KGaA Huek and Co filed Critical Hella KGaA Huek and Co
Publication of EP0094519A2 publication Critical patent/EP0094519A2/en
Publication of EP0094519A3 publication Critical patent/EP0094519A3/en
Application granted granted Critical
Publication of EP0094519B1 publication Critical patent/EP0094519B1/en
Expired legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/323—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
    • F21S41/20—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
    • F21S41/28—Cover glass

Definitions

  • the invention relates to a dimmed vehicle headlight, in which a reflector is used which forms a section of ellipses in the axial longitudinal sections, which are congruent at an apex and the associated focal point and whose eccentricity from the vertical axial longitudinal section to the horizontal axial Longitudinal section increases.
  • a screen is arranged, which produces the light-dark boundary with its upper edge.
  • a convex converging lens is arranged, which lies with its focal plane in the focal point of the ellipse resulting in the vertical axial section of the reflector.
  • a reflector section is arranged to the side and above the reflector axis between the convex converging lens and the diaphragm that generates the light-dark boundary, and this section provides more illumination the side areas should worry.
  • a disadvantage of this headlamp version is that the side reflector sections arranged between the screen and the convex lens can only be attached accurately and functionally reliably in relation to the main reflector at great expense.
  • the distance between the converging lens and the screen is predetermined in practice by the difference in eccentricity between the elliptical sections resulting in the horizontal and vertical longitudinal sections of the main reflector. In practice, this distance is too small to obtain a sufficiently large reflection surface.
  • US-A-1 393 573 discloses a vehicle headlight which has an ellipsoidal reflector, the opening of which is covered by a lens. In its center, this lens has a biconcave converging lens, which directs both the light reflected by the reflector and the light emerging directly from the incandescent lamp in parallel.
  • the circular ring surface around the converging lens has ring prisms which also direct the light directly from the incandescent lamp onto the lens in parallel.
  • Such a headlight produces a highly focused high beam and cannot be used as a dimmed vehicle headlight.
  • the object of the invention is to improve the light distribution of the known headlights described above so that increased illumination of the road edges and the areas immediately in front of the vehicle is achieved.
  • the headlamp should be structurally improved in such a way that the components causing the lateral road illumination can be manufactured and assembled more easily and with a greater tolerance.
  • the invention therefore relates to a headlamp with a cup-shaped reflector, the inner reflection surface of which forms a section of ellipses in the axial longitudinal sections, of which an apex and the associated focal point are congruent and whose eccentricity from the vertical axial longitudinal section to the horizontal one axial longitudinal section increases and with a convex arranged in the vertical plane of the second focal point of the ellipse resulting in the vertical axial longitudinal section of the reflector and producing the light-dark boundary and a convex arranged in the second focal point of the ellipse resulting in the horizontal axial longitudinal section of the reflector Converging lens with a rectangular base.
  • the base surface of the lens is an upright rectangle, the sides of which are in a ratio> 1.2: 1 and that a frisis disc is arranged to the side of the lens, which the light emerging directly from the incandescent lamp in the Collects verticals and directs them down as a whole and deflects them horizontally towards the lens axis.
  • the prismatic lens can be made wider, so that direct light strikes it from a larger solid angle.
  • the arrangement of the prismatic lens next to the convex lens has the further advantage over the prior art that the illuminated optical lens, which in addition to directing light also has the function of a signal surface, is enlarged.
  • headlamps not only have the task of illuminating the field in front of the vehicle so that the driver can see well, they also have the function of a signal lamp that signals oncoming traffic that a vehicle is approaching.
  • the converging lens is advantageous to design as a plano-convex converging lens and to arrange it with its flat surface at least approximately in the outer focal point of the elliptical section resulting in the horizontal axial section of the reflecting surface of the reflector. This allows the lens to be made particularly narrow, and the diaphragm edge is imaged in the central region of the lens, as a result of which a sharper image is achieved becomes.
  • the prismatic lens is advantageously made of plastic because of the simpler and more precise manufacture. It is also advantageous to arrange a prismatic lens on both sides of the convex lens so that the light distribution in front of the vehicle is symmetrical as far as necessary and advantageously. So that the light from the incandescent lamp strikes the two prismatic disks on the side of the lens as perpendicular as possible, they are at an obtuse angle to each other. Furthermore, it is advantageous to design the two prismatic disks in one piece and to glue the lens into a central opening in the prismatic disk.
  • FIG. 1 shows the reflector 1 forming a semi-ellipse with the semi-axes a and b and with the inner focal point F and the outer focal point F1.
  • a screen 2 is arranged in the vertical plane of the focal point F1, the upper, substantially horizontal edge of which creates the cut-off line.
  • the convex converging lens 3 is arranged in the outer second focal point F2 of the ellipse of the reflector 1 that results in the horizontal axial longitudinal section. The focal length of this converging lens 3 corresponds to the distance between F1 and F2.
  • the convex converging lens 3 is rectangular in the base 4 in such a way that it forms an upright rectangle, the sides of which are in a ratio of> 1.2: 1.
  • Wing-like prismatic disks 7 and 8 are arranged on the side surfaces 5 and 5 of the lens, which deflect the light emerging directly from the incandescent lamp arranged in the focal point F.
  • the light beams 9 are bundled by prisms 10 running approximately parallel and the entire light beam is inclined towards the roadway.
  • the beams 11 are deflected towards the central axis X of the headlight, which is also the central axis of the reflector 1, by prisms 12.
  • the rays 11, however, continue to diverge even after the deflection, so that a larger side scatter is achieved.
  • the wing-shaped prismatic discs 7 and 8 are made in one piece.
  • the lens 3 is inserted into a central opening of the one-piece prismatic lens.

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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)

Description

Die Erfindung bezieht sich auf einen abgeblendeten Fahrzeugscheinwerfer, bei dem ein Reflektor verwendet wird, der in den axialen Längsschnitten jeweils einen Abschnitt von Ellipsen bildet, die in einem Scheitelpunkt und dem dazugehörigen Brennpunkt deckungsgleich sind und deren Exzentrizität von dem vertikalen axialen Längsschnitt zu dem horizontalen axialen Längsschnitt zunimmt. In der Vertikalebene des zweiten Brennpunktes der sich im vertikalen axialen Längsschnitt des Reflektors ergebenden Ellipse ist ein Blendschirm angeordnet, der mit seiner oberen Kante die Hell- Dunkel-Grenze erzeugt. In dem zweiten Brennpunkt der sich im horizontalen axialen Längsschnitt des Reflektors ergebenden Ellipse ist eine konvexe Sammellinse angeordnet, die mit ihrer Brennebene in dem Brennpunkt der sich im vertikalen axialen Schnitt des Reflektors ergebenden Ellipse liegt. Ein derartiger in der DE-A-24 46 521 beschriebener Scheinwerfer erzeugt ein Lichtbild, welches in vertikaler Richtung stark gebündelt ist, während es in der Horizontalen gestreut ausfällt. Die seitliche Streuung ist jedoch noch so gering, daß Gegenstände am seitlichen Fahrbahnrand, wie z.B. Verkehrsschilder, nicht genügend ausgeleuchtet werden. Um diesen Nachteil zu beseitigen, wird in der DE-A-24 25 335 bereits vorgeschlagen, daß zwischen der konvexen Sammellinse und dem die Hell-Dunkel-Grenze erzeugenden Blendschirm seitlich und oberhalb der Reflektorachse jeweils ein Reflektorabschnitt angeordnet ist, die für eine stärkere Ausleuchtung der Seitenbereiche sorgen sollen. Nachteilig bei die ser Scheinwerferausführung ist, daß die zwischen Blendschirm und Konvexlinse angeordneten seitlichen Reflektorabschnitte nur unter großem Aufwand exakt und funktionssicher in Relation zu dem Hauptreflektor befestigt werden können. Außerdem ist der Abstand zwischen der Sammellinse und dem Blendschirm in der Praxis durch den Unterschied der Exzentrizität zwischen den sich im horizontalen und im vertikalen Längsschnitt des Hauptreflektors ergebenden Ellipsenabschnitten vorbestimmt. Dieser Abstand ist in der Praxis zu klein, un eine genügend große Reflexionsfläche zu erhalten.The invention relates to a dimmed vehicle headlight, in which a reflector is used which forms a section of ellipses in the axial longitudinal sections, which are congruent at an apex and the associated focal point and whose eccentricity from the vertical axial longitudinal section to the horizontal axial Longitudinal section increases. In the vertical plane of the second focal point of the ellipse resulting in the vertical axial longitudinal section of the reflector, a screen is arranged, which produces the light-dark boundary with its upper edge. In the second focal point of the ellipse resulting in the horizontal axial longitudinal section of the reflector, a convex converging lens is arranged, which lies with its focal plane in the focal point of the ellipse resulting in the vertical axial section of the reflector. Such a headlight described in DE-A-24 46 521 produces a light image which is strongly bundled in the vertical direction, while it is scattered horizontally. However, the lateral spread is still so small that objects on the side of the road, e.g. Traffic signs, not sufficiently illuminated. In order to eliminate this disadvantage, it is already proposed in DE-A-24 25 335 that a reflector section is arranged to the side and above the reflector axis between the convex converging lens and the diaphragm that generates the light-dark boundary, and this section provides more illumination the side areas should worry. A disadvantage of this headlamp version is that the side reflector sections arranged between the screen and the convex lens can only be attached accurately and functionally reliably in relation to the main reflector at great expense. In addition, the distance between the converging lens and the screen is predetermined in practice by the difference in eccentricity between the elliptical sections resulting in the horizontal and vertical longitudinal sections of the main reflector. In practice, this distance is too small to obtain a sufficiently large reflection surface.

In der US-A-1 393 573 ist ein Fahrzeugscheinwerfer offenbart, der einen ellipsoidförmigen Reflektor aufweist, dessen öffnung von einer Lichtscheibe abgedeckt ist. Diese Lichtscheibe weist in ihrem Zentrum eine bikonkave Sammellinse auf, die sowohl das von dem Reflektor reflektierte als auch das direkt aus der Glühlampe ausfallende Licht parallel richtet. Die um die Sammellinse herum liegende Kreisringfläche weist Ringprismen auf, welche das direkt aus der Glühlampe auf die Lichtscheibe auftreffende Licht ebenfalls parallel richten. Ein solcher Scheinwerfer erzeugt ein stark gebündeltes Fernlicht und ist nicht anwendbar als abgeblendeter Fahrzeugscheinwerfer.US-A-1 393 573 discloses a vehicle headlight which has an ellipsoidal reflector, the opening of which is covered by a lens. In its center, this lens has a biconcave converging lens, which directs both the light reflected by the reflector and the light emerging directly from the incandescent lamp in parallel. The circular ring surface around the converging lens has ring prisms which also direct the light directly from the incandescent lamp onto the lens in parallel. Such a headlight produces a highly focused high beam and cannot be used as a dimmed vehicle headlight.

Aufgabe der Erfindung ist es, die Lichtverteilung der vorstehend beschriebenen bekannten Scheinwerfer so zu verbessern, daß eine erhöhte Ausleuchtung der Fahrbahnränder und der Bereiche unmittelbar vor dem Fahrzeug erreicht wird. Darüber hinaus soll der Scheinwerfer konstruktiv derart verbessert werden, daß die die seitliche Fahrbahnausleuchtung bewirkenden Bauteile einfacher und mit einer größeren Toleranz gefertigt und montiert werden können.The object of the invention is to improve the light distribution of the known headlights described above so that increased illumination of the road edges and the areas immediately in front of the vehicle is achieved. In addition, the headlamp should be structurally improved in such a way that the components causing the lateral road illumination can be manufactured and assembled more easily and with a greater tolerance.

Die Erfindung bezieht sich daher auf einen Scheinwerfer mit einem schalenförmigen Reflektor, dessen innenliegende Reflexionsfläche in den axial en Längsschnitten jeweils einen Abschnitt von Ellipsen bildet, von denen ein Scheitelpunkt und der dazugehörige Brennpunkt deckungsgleich sind und deren Exzentrizität von dem vertikalen axialen Längsschnitt zu dem horizontal en axialen Längsschnitt zunimmt und mit einem in der Vertikalebene des zweiten Brennpunktes der sich im vertikalen axialen Längsschnitt des Reflektors ergebenden Ellipse angeordneten und die Hell-Dunkel-Grenze erzeugenden Blendschirm und einer im zweiten Brennpunkt des sich im horizontalen axialen Längsschnittes de s Reflektors ergebenden Ellipse angeordneten konvexen Sammellinse, deren Grundfläche rechteckig ist. Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Grundfläche der Linse ein hochkant stehendes Rechteck ist, dessen Seiten in einem Verhältnis > 1,2:1 stehen und daß seitlich der Linse eine Frismenscheibe angeordnet ist, die das direkt aus der Glülampe austretende Licht in der Vertikalen sammelt und insgesamt nach unten lenkt und in der Horizontalen zur Linsenachse hin ablenkt.The invention therefore relates to a headlamp with a cup-shaped reflector, the inner reflection surface of which forms a section of ellipses in the axial longitudinal sections, of which an apex and the associated focal point are congruent and whose eccentricity from the vertical axial longitudinal section to the horizontal one axial longitudinal section increases and with a convex arranged in the vertical plane of the second focal point of the ellipse resulting in the vertical axial longitudinal section of the reflector and producing the light-dark boundary and a convex arranged in the second focal point of the ellipse resulting in the horizontal axial longitudinal section of the reflector Converging lens with a rectangular base. The object is achieved in that the base surface of the lens is an upright rectangle, the sides of which are in a ratio> 1.2: 1 and that a frisis disc is arranged to the side of the lens, which the light emerging directly from the incandescent lamp in the Collects verticals and directs them down as a whole and deflects them horizontally towards the lens axis.

Durch die schmalere Ausgestaltung der Konvexlinse kann die Prismenscheibe breiter ausgestaltet werden, so daß direktes Licht aus einem größeren Raumwinkel auf sie auftrifft. Die Anordnung der Prismenscheibe neben der Konvexlinse hat gegenüber dem Stand der Technik noch den weiteren Vorteil, daß die beleuchtete optische Abschlußscheibe, die neben der Lichtlenkung auch noch die Funktion einer Signalfläche hat, vergrößert wird. Scheinwerfer haben bekanntlich nicht nur die Aufgabe, das vor dem Fahrzeug befindliche Feld auszuleuchten, damit der Fahrzeuglenker gut sieht, sondern haben darüber hinaus auch noch die Funktion einer Signalleuchte, die dem Begegnungsverkehr das Annähern eines Fahrzeugs signalisiert.Due to the narrower design of the convex lens, the prismatic lens can be made wider, so that direct light strikes it from a larger solid angle. The arrangement of the prismatic lens next to the convex lens has the further advantage over the prior art that the illuminated optical lens, which in addition to directing light also has the function of a signal surface, is enlarged. As is well known, headlamps not only have the task of illuminating the field in front of the vehicle so that the driver can see well, they also have the function of a signal lamp that signals oncoming traffic that a vehicle is approaching.

Weiterhin ist es vorteilhaft, die Sammellinse als eine plankonvexe Sammellinse auszuführen und sie mit ihrer Planfläche zumindest in etwa in dem äußeren Brennpunkt des sich im horizontalen axialen Schnitt der Reflexionsfläche des Reflekfors ergebenden Ellipsenabschnitts anzuordnen. Damit kann die Linse besonders schmal ausgeführt werden, und die Abbildung der Blendenkante erfolgt im mittleren Bereich de Linse, wodurch eine schärfere Abbildung erreich wird.Furthermore, it is advantageous to design the converging lens as a plano-convex converging lens and to arrange it with its flat surface at least approximately in the outer focal point of the elliptical section resulting in the horizontal axial section of the reflecting surface of the reflector. This allows the lens to be made particularly narrow, and the diaphragm edge is imaged in the central region of the lens, as a result of which a sharper image is achieved becomes.

Wegen der hohen Temperaturen hat es sich als vorteilhaft herausgestellt, die konvexe Sammellinse aus Glas auszuführen. Die Prismenscheibe wird wegen der einfacheren und genaueren Herstellbarkeit vorteilhafterweise aus Kunststoff hergestellt. Weiterhin ist es vorteilhaft, auf beiden Seiten der Konvexlinse eine Prismenscheibe anzuordnen, damit die Lichtverteilung vor dem Fahrzeug soweit wie erforderlich und vorteilhaft symmetrisch ist. Damit das Licht direkt aus der Glühlampe auf die beiden seitlich der Linse angeordneten Prismenscheiben möglichst rechtwinklig auftrifft, stehen diese in einem stumpfen Winkel zueinander. Weiterhin ist es vorteilhaft, die beiden Prismenscheiben einteilig auszufüren und die Linse in eine zentrale Öffnung der Prismenscheibe einzukleben.Because of the high temperatures, it has proven advantageous to design the convex lens made of glass. The prismatic lens is advantageously made of plastic because of the simpler and more precise manufacture. It is also advantageous to arrange a prismatic lens on both sides of the convex lens so that the light distribution in front of the vehicle is symmetrical as far as necessary and advantageously. So that the light from the incandescent lamp strikes the two prismatic disks on the side of the lens as perpendicular as possible, they are at an obtuse angle to each other. Furthermore, it is advantageous to design the two prismatic disks in one piece and to glue the lens into a central opening in the prismatic disk.

Die Zeichnung veranschaulicht ein vorteilhaftes Ausführungsbeispiel, und zwar zeigt

  • Figur 1 einen vertikalen axialen Längsschnitt und
  • Figur 2 einen horizontalen axialen Längsschnitt durch den Scheinwerfer, während
  • Figur 3 einen Schnitt nach der Linie A-A darstellt.
The drawing illustrates an advantageous embodiment, namely shows
  • 1 shows a vertical axial longitudinal section and
  • Figure 2 is a horizontal axial longitudinal section through the headlight, while
  • Figure 3 shows a section along the line AA.

Figur 1 zeigt den eine Halbellipse bildenden Reflektor 1 mit den Halbachsen a und b sowie mit dem inneren Brennpunkt F und dem äuß eren Brennpunkt F1. In der Vertikalebene des Brennpunkts F1 ist ein Blendschirm 2 angeordnet, dessen obere, im wesentlichen horizontal verlaufende Kante die Hell-Dunkel-Grenze erzeugt.FIG. 1 shows the reflector 1 forming a semi-ellipse with the semi-axes a and b and with the inner focal point F and the outer focal point F1. A screen 2 is arranged in the vertical plane of the focal point F1, the upper, substantially horizontal edge of which creates the cut-off line.

In Figur 2 ist der horizontale Schnitt des Reflektors 1 dargestellt mit den Halbachsen a1 und b1 und dem Brennpunkt F. Die Halbachsen a1 und b1 sind größer ausgeführt als die Halbachsen a und b im vertikalen Schnitt. Di e Schnitte zwischen dem horizontalen und vertikalen Schnitt des Reflektors weisen ebenfalls Halbellipsen auf, die kontinuierlich ineinander übergehen. Alle Ellipsen haben einen deckungsgleichen Brennpunkt F und einen deckungsgleichen Scheitelpunkt S. In dem äußeren zweiten Brennpunkt F2 der sich im horizontalen axialen Längsschnitt ergebenden Ellipse des Reflektors 1 ist die konvexe Sammellinse 3 angeordnet. Die Brennweite dieser Sammellinse 3 entspricht dem Abstand zwischen F1 und F2.2 shows the horizontal section of the reflector 1 with the semiaxes a1 and b1 and the focal point F. The semiaxes a1 and b1 are larger than the semiaxes a and b in vertical section. The cuts between the horizontal and vertical cuts of the reflector also have semi-ellipses that continuously merge. All ellipses have a congruent focal point F and a congruent apex S. The convex converging lens 3 is arranged in the outer second focal point F2 of the ellipse of the reflector 1 that results in the horizontal axial longitudinal section. The focal length of this converging lens 3 corresponds to the distance between F1 and F2.

Die konvexe Sammellinse 3 ist in der Grundfläche 4 rechteckig derart ausgeführt, daß sie ein hochkant stehendes Rechteck bildet, dessen Seiten in einem Verhältnis von > 1,2:1 stehen. An den Seitenflächen 5 und 5 der Linse sind flügelartig Prismenscheiben 7 und 8 angeordnet, die das direkt aus der im Brennpunkt F angeordneten Glühlampe ausfallende Licht ablenken. Die Lichtstrahlen 9 werden durch Prismen 10 in etwa parallelverlaufend gebündelt und das gesamte Lichtbühdel zur Fahrbahn hin geneigt. In vertikaler Ebene werden die Strahlen 11 zur Mittelachse X des Scheinwerfers hin, die auch zugleich Mittelachse des Reflektors 1 ist, durch Prismen 12 abgelenkt. Die Strahlen 11 verlauf en jedoch auch nach der Ablenkung noch divergierend, so daß eine größere Seitenstreuung erzielt wird.The convex converging lens 3 is rectangular in the base 4 in such a way that it forms an upright rectangle, the sides of which are in a ratio of> 1.2: 1. Wing-like prismatic disks 7 and 8 are arranged on the side surfaces 5 and 5 of the lens, which deflect the light emerging directly from the incandescent lamp arranged in the focal point F. The light beams 9 are bundled by prisms 10 running approximately parallel and the entire light beam is inclined towards the roadway. In the vertical plane, the beams 11 are deflected towards the central axis X of the headlight, which is also the central axis of the reflector 1, by prisms 12. The rays 11, however, continue to diverge even after the deflection, so that a larger side scatter is achieved.

Die flügelartig ausgebildeten Prismenscheiben 7 und 8 sind einteilig ausgeführt. Dabei ist die Linse 3 in eine zentrale Öffnung der einteiligen Prismenscheibe eingesetzt.The wing-shaped prismatic discs 7 and 8 are made in one piece. The lens 3 is inserted into a central opening of the one-piece prismatic lens.

Claims (8)

1. Dipped vehicle headlight, with a dished reflector (1) whose internal reflector surface in the axial longitudinal sections forms in each case respective segments of ellipses whereof the vertices (S) and the associated focal points (F) are congruent, and whereof the eccentricity increases from the vertical axial longitudinal section to the horizontal axial longitudinal section, and with an anti-dazzle shield (2) which produces the light-dark boundary and which is situated in the vertical plane of the second focal point (F1) of the ellipse formed in the vertical axial longitudinal section of the reflector, and with a convex condensing lens (3) whose base (4) is rectangular and which is situated at the second focal point (F2) of the ellipse formed in the horizontal axial longitudinal section of the reflector (1), characterised in that the base (4) of the lens is an upended rectangle whose sides are in a ratio of > 1.2: 1, and that laterally of the lens (3) there is arranged a prism disc (7, 8) which collects the light (10,11) in the vertical plane issuing directly from the incandescent lamp and deflects it as a whole downwards, and in the horizontal plane deflects it towards the lens axis (X).
2. Dipped vehicle headlight according to claim 1, characterised in that the condensing lens (3) is constructed as a piano-convex condensing lens and is situated with its plane surface at least approximately at the outer focal point (F2) of the ellipse sector formed in the horizontal axial section of the reflection surface of the reflector (1 ).
3. Vehicle headlight according to claim 1 or 2, characterised in that the convex condensing lens (3) is made of glass, and the prism disc (7, 8) is made of synthetic plastic material.
4. Vehicle headlight according to one of the preceding claims, characterised in that a prism disc (7, 8) is arranged at both sides (5,6) of the lens (3).
5. Vehicle headlight according to one of the preceding claims, characterised in that the two prism discs (7, 8) arranged laterally of the lens (3) are situated at an obtuse angle relatively to one another.
6. Vehicle headlight according to one of the preceding claims, characterised in that the two prism discs (7,8) are made in one piece and the lens (3) is adhesively secured in a central aperture of the prism disc (7, 8).
7. Vehicle headlight according to one of the preceding claims, characterised in that the prism discs (7, 8) are concavely curved as seen from the reflector.
8. Vehicle headlight according to claim 7, characterised in that the prism discs (7, 8) form a cylinder segment whose centre point is the focal point (F) of the reflector (1).
EP83103844A 1982-05-18 1983-04-20 Non dazzling vehicle headlamp Expired EP0094519B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823218703 DE3218703A1 (en) 1982-05-18 1982-05-18 Dimmed vehicle headlights
DE3218703 1982-05-18

Publications (3)

Publication Number Publication Date
EP0094519A2 EP0094519A2 (en) 1983-11-23
EP0094519A3 EP0094519A3 (en) 1984-11-28
EP0094519B1 true EP0094519B1 (en) 1986-10-15

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EP83103844A Expired EP0094519B1 (en) 1982-05-18 1983-04-20 Non dazzling vehicle headlamp

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EP (1) EP0094519B1 (en)
JP (1) JPS58209802A (en)
AU (1) AU1448783A (en)
DD (1) DD209890A5 (en)
DE (1) DE3218703A1 (en)
ES (1) ES279983Y (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3525041C2 (en) * 1985-07-13 1994-06-16 Bosch Gmbh Robert Low beam or fog lights for motor vehicles
DE3529546C1 (en) * 1985-08-17 1987-02-05 Hella Kg Hueck & Co Dimmed vehicle headlights with an ellipsoidal reflector
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EP0094519A3 (en) 1984-11-28
DD209890A5 (en) 1984-05-23
JPS58209802A (en) 1983-12-06
ES279983U (en) 1984-12-16
DE3218703A1 (en) 1983-11-24
EP0094519A2 (en) 1983-11-23
ES279983Y (en) 1985-06-16
AU1448783A (en) 1983-11-24

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