EP0999406A2 - Optical means for vehicle - preferably motor vehicle - lamps - Google Patents

Optical means for vehicle - preferably motor vehicle - lamps Download PDF

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Publication number
EP0999406A2
EP0999406A2 EP99119796A EP99119796A EP0999406A2 EP 0999406 A2 EP0999406 A2 EP 0999406A2 EP 99119796 A EP99119796 A EP 99119796A EP 99119796 A EP99119796 A EP 99119796A EP 0999406 A2 EP0999406 A2 EP 0999406A2
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EP
European Patent Office
Prior art keywords
light intensity
lamp
lens element
illuminant
angle
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.)
Withdrawn
Application number
EP99119796A
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German (de)
French (fr)
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EP0999406A3 (en
Inventor
Hubert Zwick
Helfried Sandig
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.)
Reitter and Schefenacker GmbH and Co KG
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Reitter and Schefenacker GmbH and Co KG
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Application filed by Reitter and Schefenacker GmbH and Co KG filed Critical Reitter and Schefenacker GmbH and Co KG
Publication of EP0999406A2 publication Critical patent/EP0999406A2/en
Publication of EP0999406A3 publication Critical patent/EP0999406A3/en
Withdrawn legal-status Critical Current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
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/26—Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]

Definitions

  • the invention relates to a light optics for lights of vehicles, preferably of motor vehicles, according to the preamble of Claim 1.
  • the legislator sets maximum angle-dependent for automotive lights Luminous intensity fixed. To meet this legal requirement, the light emitted by the illuminant is replaced by a Fresnel lens parallelized and then by suitable lenses in a lens the lamp scattered in the prescribed directions.
  • the legislator prescribes a light intensity-angle characteristic curve which characterizes a rectangular light distribution as shown in FIG. 7 is designated by 6. Critical with this legally required The characteristic is points 8 and 9, which are at an angle of + 10 ° and ⁇ 10 ° still require a relatively high light intensity. This characteristic can be achieved with the described lamp, the Fresnel lenses and has lenses, can not be achieved.
  • the invention has for its object the generic Design luminaire optics in such a way that the legally prescribed Characteristic curve for a luminaire without oversized light intensity Illuminants can be achieved.
  • the lens element is included provided at least one opening. Through it, part of the rays emanating from the illuminant remain unbroken. Thereby an increased light intensity is provided in this area, since this part of the light rays does not pass through the material of the lens element must pass through.
  • the maximum light intensity is around the degree to which the part of the light rays through the Breakthrough. In this way, with the invention Luminaire optics reached a characteristic curve, the maximum at an angle of 0 ° is not only higher than that prescribed by law Maximum of light intensity, but the particular one also the critical points 8, 9 of the light intensity at the angles + 10 ° and ⁇ 10 ° at least met, preferably even exceeds.
  • the Rectangular characteristic curve prescribed by law is given by Use of the lamp optics according to the invention approximated without Illuminants are used that have a particularly high light intensity exhibit. That is why the heat is generated in the lamp low, so the disadvantages, such as critical warming of plastic parts in the luminaire can be avoided.
  • Fig. 1 shows a schematic representation of a lamp for a motor vehicle. It has a lamp housing 1 in which a reflector 2 is housed is. It reflects part of the light source 3 emitted rays to a light window 4 through which the rays step outside. In the radiation path between the illuminant 3 and the light window 4 there is a light optic 5, which is designed in this way is that the angle-dependent maximum required by law Luminous intensity is achieved in a structurally simple manner.
  • Fig. 7 shows the law for such automotive lights required angle-dependent maximum light intensity (characteristic curve 6).
  • the intensity I is plotted against the light angle ⁇ in this diagram.
  • the maximum light intensity is between ⁇ 5 ° and + 5 °.
  • ⁇ 5 to ⁇ 10 ° and +5 to + 10 ° is the maximum Luminous intensity I lower, but in this angular range on one constant level. So far it is known that the lamp 3 parallelize emitted light through a Fresnel lens and then with suitable lenses in the given directions to scatter. This results in a characteristic curve course 7 as shown in FIG. 7 is shown.
  • Fig. 3 shows the light intensity-angle characteristic of an LED as a lamp. It can be seen that the LED only has a low maximum light intensity I in the middle range and that this light intensity increases with increasing Angle decreases rapidly in both directions. With one Illuminants cannot reach the legal characteristic curve 6 become.
  • This lighting optic 5 has a refractive element 11, which is preferably a Fresnel lens is, but also, depending on the requirements for the vehicle lamp, can be a lens.
  • the emitted by the lamp 3 Rays are required by the Fresnel lens 11 Directed and parallelized.
  • a Fresnel lens 11 in conjunction with a downstream scattering optics on the inside of the light window 4 can be provided has an intensity-angle characteristic 14 according to FIG. 5. In the angular range from 0 ° to The maximum intensity I is ⁇ 5 ° higher than required by law.
  • the lamp optics 5 with a Opening 12 provided through which a part of the illuminant 3 emitted rays pass through without refraction.
  • the Opening 12 is arranged with respect to the lamp 3 so that the rays passing through the opening in the direction critical point 8 or 9 of the legal characteristic curve 6 are directed.
  • the opening 12 has a cross-sectional area, which in the exemplary embodiment 10% of the total area of the Fresnel lens Is 11. As a result, the total light intensity is reduced by 10%.
  • the light intensity I in critical point 8 or 9 of characteristic curve 6 by that amount increased, the illuminant 3 radiates in this direction.
  • Fig. 6 shows the characteristic curve 15 of two pinholes, which in Angle ⁇ 10 ° to the main beam direction.
  • this aperture 12 with the Fresnel lens 11 results in the characteristic 13 according to FIG. 7.
  • This characteristic curve 13 takes into account that those passing through the Fresnel line 11 and the opening (s) 12 Rays of the illuminant 3 through the scattering optics, for example be provided on the inside of the light window 4 can be directed in the desired directions.
  • the illuminant 3 is not required with regard to the light intensity.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Arrangements Of Lighting Devices For Vehicle Interiors, Mounting And Supporting Thereof, Circuits Therefore (AREA)

Abstract

The optical lens (5) has at least one refractive lens element (11) positioned in the light path of a light source, provided with at least one opening (12) for free passage of the light rays. The refractive lens element (11) is provided by a Fresnel lens, with the opening (12) in the lens element positioned at an angle to the main beam direction of the light source, provided by an incandescent bulb or a LED.

Description

Die Erfindung betrifft eine Leuchtenoptik für Leuchten von Fahrzeugen, vorzugsweise von Kraftfahrzeugen, nach dem Oberbegriff des Anspruches 1.The invention relates to a light optics for lights of vehicles, preferably of motor vehicles, according to the preamble of Claim 1.

Der Gesetzgeber legt für Kraftfahrzeugleuchten winkelabhängige maximale Lichtstärken fest. Um diese gesetzliche Forderung zu erfüllen, wird das vom Leuchtmittel abgestrahlte Licht durch eine Fresnellinse parallelisiert und anschließend durch geeignete Linsen in einer Lichtscheibe der Leuchte in die vorgeschriebenen Richtungen gestreut. Der Gesetzgeber schreibt eine Lichtintensität-Winkel-Kennlinie vor, die eine rechteckige Lichtverteilung kennzeichnet, wie sie in Fig. 7 mit 6 bezeichnet ist. Kritisch bei dieser gesetzlich vorgeschriebenen Kennlinie sind die Punkte 8 und 9, die in einem Winkel von +10° und ―10° noch eine verhältnismäßig hohe Lichtintensität vorschreiben. Diese Kennlinie kann mit der beschriebenen Leuchte, die Fresnellinsen und Streulinsen aufweist, nicht erreicht werden. Aus diesem Grunde werden hinsichtlich ihrer Lichtstärke überdimensionierte Leuchtmittel verwendet, die im Winkel 0° eine sehr hohe Lichtintensität aufweisen und deren Intensität-Winkel-Kennlinie sehr breit ist. Aufgrund dieser Überdimensionierung wird zwar der kritische Bereich 8 und 9 der gesetzlich vorgeschriebenen Kennlinie 6 erfüllt, jedoch tritt infolge der Überdimensionierung des Leuchtmittels eine erhebliche Wärmeentwicklung auf, die nachteilig ist. The legislator sets maximum angle-dependent for automotive lights Luminous intensity fixed. To meet this legal requirement, the light emitted by the illuminant is replaced by a Fresnel lens parallelized and then by suitable lenses in a lens the lamp scattered in the prescribed directions. The legislator prescribes a light intensity-angle characteristic curve which characterizes a rectangular light distribution as shown in FIG. 7 is designated by 6. Critical with this legally required The characteristic is points 8 and 9, which are at an angle of + 10 ° and ―10 ° still require a relatively high light intensity. This characteristic can be achieved with the described lamp, the Fresnel lenses and has lenses, can not be achieved. For this Basically, they are oversized with regard to their light intensity Illuminants used that have a very high light intensity at an angle of 0 ° have and whose intensity-angle characteristic is very wide. Because of this oversizing, the critical area is indeed 8 and 9 of the legally required characteristic 6 fulfilled, however occurs due to the oversizing of the lamp a considerable Development of heat that is disadvantageous.

Der Erfindung liegt die Aufgabe zugrunde, die gattungsgemäße Leuchtenoptik so auszubilden, daß die gesetzlich vorgeschriebene Kennlinie für eine Leuchte ohne hinsichtlich der Lichtstärke überdimensionierte Leuchtmittel erreicht werden kann.The invention has for its object the generic Design luminaire optics in such a way that the legally prescribed Characteristic curve for a luminaire without oversized light intensity Illuminants can be achieved.

Diese Aufgabe wird bei der gattungsgemäßen Leuchtenoptik erfindungsgemäß mit den kennzeichnenden Merkmalen des Anspruches 1 gelöst.This object is achieved according to the invention in the generic luminaire optics with the characterizing features of claim 1 solved.

Bei der erfindungsgemäßen Leuchtenoptik ist das Linsenelement mit wenigstens einer Durchbrechung versehen. Durch sie tritt ein Teil der vom Leuchtmittel ausgehenden Strahlen ungebrochen hindurch. Dadurch ist in diesem Bereich eine erhöhte Lichtintensität vorgesehen, da dieser Teil der Lichtstrahlen nicht durch das Material des Linsenelementes hindurchtreten muß. Die maximale Lichtintensität wird um den Grad abgesenkt, um den der Teil der Lichtstrahlen durch die Durchbrechung hindurchtritt. Auf diese Weise wird mit der erfindungsgemäßen Leuchtenoptik eine Kennlinie erreicht, deren Maximum im Winkel 0° nicht nur höher liegt als das gesetzlich vorgeschriebene Maximum der Lichtintensität, sondern die insbesondere auch die kritischen Punkte 8, 9 der Lichtintensität bei den Winkeln +10° und ―10° zumindest erfüllt, vorzugsweise sogar übersteigt. Die vom Gesetzgeber vorgeschriebene rechteckige Kennlinie wird durch Einsatz der erfindungsgemäßen Leuchtenoptik angenähert, ohne daß Leuchtmittel verwendet werden, die eine besonders hohe Lichtintensität aufweisen. Darum ist auch die Wärmeentwicklung in der Leuchte gering, so daß die damit verbundenen Nachteile, wie kritische Erwärmung von Kunststoffteilen in der Leuchte, vermieden werden.In the luminaire optics according to the invention, the lens element is included provided at least one opening. Through it, part of the rays emanating from the illuminant remain unbroken. Thereby an increased light intensity is provided in this area, since this part of the light rays does not pass through the material of the lens element must pass through. The maximum light intensity is around the degree to which the part of the light rays through the Breakthrough. In this way, with the invention Luminaire optics reached a characteristic curve, the maximum at an angle of 0 ° is not only higher than that prescribed by law Maximum of light intensity, but the particular one also the critical points 8, 9 of the light intensity at the angles + 10 ° and ―10 ° at least met, preferably even exceeds. The Rectangular characteristic curve prescribed by law is given by Use of the lamp optics according to the invention approximated without Illuminants are used that have a particularly high light intensity exhibit. That is why the heat is generated in the lamp low, so the disadvantages, such as critical warming of plastic parts in the luminaire can be avoided.

Weitere Merkmale der Erfindung ergeben sich aus den weiteren Ansprüchen, der Beschreibung und den Zeichnungen. Further features of the invention result from the further claims, the description and the drawings.

Die Erfindung wird anhand eines in den Zeichnungen dargestellten Ausführungsbeispieles näher erläutert. Es zeigen

Fig. 1
in schematischer Darstellung eine Kraftfahrzeugleuchte mit einer erfindungsgemäßen Leuchtenoptik,
Fig. 2
in vergrößerter und perspektivischer Darstellung einen Teil der erfindungsgemäßen Leuchtenoptik,
Fig. 3 bis Fig. 7
verschiedene Intensität-Winkel-Diagramme.
The invention is explained in more detail using an exemplary embodiment shown in the drawings. Show it
Fig. 1
a schematic representation of a motor vehicle lamp with a lamp optics according to the invention,
Fig. 2
an enlarged and perspective view of part of the luminaire optics according to the invention,
3 to 7
different intensity-angle diagrams.

Fig. 1 zeigt in schematischer Darstellung eine Leuchte für ein Kraftfahrzeug. Es hat ein Leuchtengehäuse 1, in dem ein Reflektor 2 untergebracht ist. Er reflektiert einen Teil der von einem Leuchtmittel 3 ausgesandten Strahlen zu einem Lichtfenster 4, durch das die Strahlen nach außen treten. Im Strahlungsweg zwischen dem Leuchtmittel 3 und dem Lichtfenster 4 liegt eine Leuchtenoptik 5, die so gestaltet ist, daß die vom Gesetzgeber geforderte winkelabhängige maximale Lichtstärke in konstruktiv einfacher Weise erreicht wird.Fig. 1 shows a schematic representation of a lamp for a motor vehicle. It has a lamp housing 1 in which a reflector 2 is housed is. It reflects part of the light source 3 emitted rays to a light window 4 through which the rays step outside. In the radiation path between the illuminant 3 and the light window 4 there is a light optic 5, which is designed in this way is that the angle-dependent maximum required by law Luminous intensity is achieved in a structurally simple manner.

Fig. 7 zeigt die vom Gesetzgeber für solche Kraftfahrzeugleuchten geforderte winkelabhängige maximale Lichtstärke (Kennlinie 6). In diesem Diagramm ist die Intensität I gegen den Leuchtwinkel Ω aufgetragen. Der Gesetzgeber schreibt vor, daß in einem Winkelbereich zwischen ―5° und +5° die maximale Lichtintensität vorhanden ist. In einem Winkelbereich von ―5 bis ―10° und +5 bis +10° ist die maximale Lichtstärke I geringer, jedoch in diesem Winkelbereich auf einem konstanten Niveau. Bisher ist es bekannt, das vom Leuchtmittel 3 ausgesandte Licht durch eine Fresnellinse zu parallelisieren und anschließend durch geeignete Linsen in die vorgegebenen Richtungen zu streuen. Hierbei ergibt sich ein Kennlinienverlauf 7, wie er in Fig. 7 dargestellt ist. Es ist erkennbar, daß zwar die maximale Lichtstärke I im Bereich zwischen 0° und ―5° bzw. +5° erreicht wird, daß aber die kritischen Bereiche 8 und 9 der geforderten Kennlinie 6 nicht erfüllt werden. In diesen Bereichen ist die Lichtstärke wesentlich geringer, als sie vom Gesetzgeber gefordert wird.Fig. 7 shows the law for such automotive lights required angle-dependent maximum light intensity (characteristic curve 6). In The intensity I is plotted against the light angle Ω in this diagram. Legislature prescribes that in an angular range the maximum light intensity is between ―5 ° and + 5 °. In an angular range of ―5 to ―10 ° and +5 to + 10 ° is the maximum Luminous intensity I lower, but in this angular range on one constant level. So far it is known that the lamp 3 parallelize emitted light through a Fresnel lens and then with suitable lenses in the given directions to scatter. This results in a characteristic curve course 7 as shown in FIG. 7 is shown. It can be seen that the maximum light intensity I in the range between 0 ° and ―5 ° or + 5 ° is reached, but that critical areas 8 and 9 of the required characteristic 6 are not met become. In these areas, the light intensity is much lower, when required by law.

Fig. 3 zeigt die Lichtstärke-Winkel-Kennlinie einer LED als Leuchtmittel. Es ist erkennbar, daß die LED nur eine geringe maximale Lichtstärke I im Mittelbereich hat und daß diese Lichtstärke mit zunehmendem Winkel in beiden Richtungen rasch abnimmt. Mit einem solchen Leuchtmittel kann der gesetzliche Kennlinienverlauf 6 nicht erreicht werden.Fig. 3 shows the light intensity-angle characteristic of an LED as a lamp. It can be seen that the LED only has a low maximum light intensity I in the middle range and that this light intensity increases with increasing Angle decreases rapidly in both directions. With one Illuminants cannot reach the legal characteristic curve 6 become.

Wird eine solche LED mit einer Fresnellinse kombiniert, ergibt sich die Lichtstärke-Winkel-Kennlinie 10 gemäß Fig. 4. Nunmehr wird im Mittelbereich eine sehr hohe Lichtstärke I erzielt, die allerdings, ausgehend vom Winkel 0°, nach beiden Seiten hin sehr rasch abfällt. Mit einer solchen Leuchtenoptik kann zwar der in 0°-Richtung geforderte maximale Lichtstärkenwert erreicht werden, jedoch werden die maximalen Lichtstärkewerte insbesondere in den kritischen Bereichen 8 und 9 der gesetzlichen Kennlinie 6 nicht erreicht.If such an LED is combined with a Fresnel lens, the result is the light intensity-angle characteristic 10 according to FIG. 4. Now in Middle range achieved a very high light intensity I, which, however, starting from the angle 0 °, drops very quickly on both sides. With Such a light optic can indeed be the one required in the 0 ° direction maximum light intensity value can be achieved, however, the maximum Luminous intensity values, especially in the critical areas 8 and 9 of the legal characteristic 6 is not reached.

Um die Lichtstärkenverteilung gemäß Kennlinie 6 in konstruktiv einfacher Weise zu erreichen, wird die Leuchtenoptik 5 eingesetzt, die anhand von Fig. 2 näher erläutert werden soll. Diese Leuchtenoptik 5 hat ein lichtbrechendes Element 11, das vorzugsweise eine Fresnellinse ist, aber auch, je nach Anforderungen an die Kraftfahrzeugleuchte, eine Streulinse sein kann. Die vom Leuchtmittel 3 ausgesandten Strahlen werden durch die Fresnellinse 11 in die erforderliche Richtung gelenkt und parallelisiert. Eine solche Fresnellinse 11 in Verbindung mit einer nachgeschalteten Streuoptik, die an der Innenseite des Lichtfensters 4 vorgesehen sein kann, hat eine Intensität-Winkel-Kennlinie 14 gemäß Fig. 5. Im Winkelbereich von 0° bis ±5° ist die maximale Intensität I höher, als vom Gesetzgeber gefordert. In den Bereichen 8, 9 ist allerdings die maximale Lichtintensität zu gering. Aus diesem Grunde ist die Leuchtenoptik 5 mit einer Durchbrechung 12 versehen, durch welche ein Teil der vom Leuchtmittel 3 ausgesandten Strahlen ohne Brechung hindurchtritt. Die Durchbrechung 12 ist in bezug auf das Leuchtmittel 3 so angeordnet, daß die durch die Durchbrechung hindurchtretenden Strahlen in Richtung des kritischen Punktes 8 bzw. 9 des gesetzlichen Kennlinienverlaufes 6 gerichtet sind. Die Durchbrechung 12 hat eine Querschnittsfläche, die im Ausführungsbeispiel 10 % der Gesamtfläche der Fresnellinse 11 beträgt. Dies hat zur Folge, daß die gesamte Lichtintensität um 10 % gesenkt wird. Gleichzeitig wird aber die Lichtintensität I im kritischen Punkt 8 bzw. 9 der Kennlinie 6 um denjenigen Betrag erhöht, den das Leuchtmittel 3 in diese Richtung strahlt. Bei Einsatz der beschriebenen Leuchtenoptik 5 ergibt sich somit ein Kennlinienverlauf 13 gemäß Fig. 7. Aufgrund der Durchbrechung 12 wird die Lichtintensität I in dem entsprechenden Winkelbereich erhöht, so daß die vom Gesetzgeber geforderte maximale Lichtstärke am kritischen Punkt 8 bzw. 9 ohne konstruktiven Aufwand erreicht wird. In Fig. 2 ist beispielhaft dargestellt, daß die Leuchtenoptik 5 nur eine Durchbrechung 12 aufweist. Damit wird lediglich einer der beiden kritischen Bereiche 8 oder 9 der gesetzlich vorgeschriebenen Kennlinie 6 durch eine Kraftfahrzeugleuchte mit einer solchen Leuchtenoptik 5 erfüllt. Soll die maximale Lichtstärke in den beiden kritischen Bereichen 8, 9 den gesetzlichen Maximalwert erreichen oder gar überschreiten, wird die Leuchtenoptik 5 mit zwei Durchbrechungen 12 versehen, durch welche ein Teil der vom Leuchtmittel 3 ausgehenden Strahlen ungebrochen durchtritt.To make the light intensity distribution according to characteristic curve 6 simpler in design To achieve this, the luminaire optics 5 are used is to be explained in more detail with reference to FIG. 2. This lighting optic 5 has a refractive element 11, which is preferably a Fresnel lens is, but also, depending on the requirements for the vehicle lamp, can be a lens. The emitted by the lamp 3 Rays are required by the Fresnel lens 11 Directed and parallelized. Such a Fresnel lens 11 in conjunction with a downstream scattering optics on the inside of the light window 4 can be provided has an intensity-angle characteristic 14 according to FIG. 5. In the angular range from 0 ° to The maximum intensity I is ± 5 ° higher than required by law. In areas 8, 9, however, is the maximum light intensity too low. For this reason, the lamp optics 5 with a Opening 12 provided through which a part of the illuminant 3 emitted rays pass through without refraction. The Opening 12 is arranged with respect to the lamp 3 so that the rays passing through the opening in the direction critical point 8 or 9 of the legal characteristic curve 6 are directed. The opening 12 has a cross-sectional area, which in the exemplary embodiment 10% of the total area of the Fresnel lens Is 11. As a result, the total light intensity is reduced by 10%. At the same time, however, the light intensity I in critical point 8 or 9 of characteristic curve 6 by that amount increased, the illuminant 3 radiates in this direction. When in use The characteristic of the luminaire 5 described thus results in a characteristic curve 13 according to FIG. 7. Due to the opening 12 Light intensity I increased in the corresponding angular range, so that the maximum light intensity required by law at the critical Point 8 or 9 is achieved without any design effort. 2 is exemplified that the lamp optics 5 only one opening 12 has. This only makes one of the two critical Areas 8 or 9 of the legally required characteristic 6 through met a motor vehicle lamp with such a lamp optics 5. Should the maximum light intensity in the two critical areas 8, 9 will reach or even exceed the legal maximum provide the lamp optics 5 with two openings 12, through which part of the rays emanating from the illuminant 3 remain unbroken passes.

Fig. 6 zeigt den Kennlinienverlauf 15 zweier Lochblenden, die im Winkel ±10° zur Hauptstrahlrichtung liegen. Durch die Kombination dieser Lochblenden 12 mit der Fresnellinse 11 ergibt sich die Kennlinie 13 gemäß Fig. 7. Bei dieser Kennlinie 13 ist berücksichtigt, daß die durch die Fresnellinie 11 und die Durchbrechung(en) 12 hindurchtretenden Strahlen des Leuchtmittels 3 durch die Streuoptik, die beispielsweise an der Innenseite des Lichtfensters 4 vorgesehen sein kann, in die gewünschten Richtungen gelenkt werden.Fig. 6 shows the characteristic curve 15 of two pinholes, which in Angle ± 10 ° to the main beam direction. Through the combination this aperture 12 with the Fresnel lens 11 results in the characteristic 13 according to FIG. 7. This characteristic curve 13 takes into account that those passing through the Fresnel line 11 and the opening (s) 12 Rays of the illuminant 3 through the scattering optics, for example be provided on the inside of the light window 4 can be directed in the desired directions.

Bei Verwendung der Leuchtenoptik 5 ist eine Überdimensionierung des Leuchtmittels 3 hinsichtlich der Lichtstärke nicht erforderlich. Das Leuchtmittel 3, das eine Glühlampe, eine LED oder ein sonstiger Leuchtkörper sein kann, muß hinsichtlich seiner Lichtstärke nicht überdimensioniert werden. Aufgrund der wenigstens einen Durchbrechung 12 in der Leuchtenoptik 5 wird in einfacher Weise gewährleistet, daß in einem seitlichen Winkelbereich die vom Gesetzgeber geforderte maximale Lichtintensität erreicht wird. Die Durchbrechung kann nachträglich an der Leuchtenoptik 5 angebracht werden, so daß Werkzeugkosten für die Herstellung der Leuchtenoptik gespart werden können.If the lamp optics 5 are used, they are oversized the illuminant 3 is not required with regard to the light intensity. The Illuminant 3, which is a light bulb, an LED or another Can be luminous, does not have to with regard to its light intensity be oversized. Because of the at least one opening 12 in the light optics 5 is ensured in a simple manner that in a lateral angular range that required by law maximum light intensity is reached. The breakthrough can be retrofitted to the lamp optics 5, so that Tool costs for the manufacture of the luminaire optics can be saved can.

Claims (7)

Leuchtenoptik für Leuchten von Fahrzeugen, vorzugsweise von Kraftfahrzeugen, mit mindestens einem lichtbrechenden Linsenelement, das im Strahlweg wenigstens eines Leuchtmittels liegt,
dadurch gekennzeichnet, daß das Linsenelement (11) wenigstens eine Durchbrechung (12) aufweist, durch die ein Teil der vom Leuchtmittel (3) ausgehenden Strahlen ungebrochen hindurchgeht.Luminaire optics for lights of vehicles, preferably of motor vehicles, with at least one light-refractive lens element which lies in the beam path of at least one illuminant,
characterized in that the lens element (11) has at least one opening (12) through which part of the rays emanating from the illuminant (3) passes uninterrupted. Leuchtenoptik nach Anspruch 1,
dadurch gekennzeichnet, daß die Durchbrechung (12) in einem Winkel zur Hauptstrahlrichtung der durch das Linsenelement (11) hindurchgehenden Strahlen liegt.Luminaire optics according to claim 1,
characterized in that the opening (12) lies at an angle to the main beam direction of the beams passing through the lens element (11). Leuchtenoptik nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß die Durchbrechung (12) so angeordnet ist, daß die mit der Leuchtenoptik (5) ausgestattete Leuchte im Winkel zur Hauptstrahlrichtung eine solche erhöhte Lichtintensität (I) aufweist, daß sie der gesetzlichen Forderung (Kennlinie 6) genügt. Luminaire optics according to claim 1 or 2,
characterized in that the opening (12) is arranged so that the lamp equipped with the lamp optics (5) has such an increased light intensity (I) at an angle to the main beam direction that it meets the legal requirement (characteristic curve 6). Leuchtenoptik nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, daß das Linsenelement (11) eine Fresnellinse ist.Luminaire optics according to one of claims 1 to 3,
characterized in that the lens element (11) is a Fresnel lens. Leuchtenoptik nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, daß das Linsenelement (11) eine Streulinse ist.Luminaire optics according to one of claims 1 to 3,
characterized in that the lens element (11) is a diffusing lens. Leuchtenoptik nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, daß das Leuchtmittel (3) eine Glühlampe ist.Luminaire optics according to one of claims 1 to 5,
characterized in that the illuminant (3) is an incandescent lamp. Leuchtenoptik nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, daß das Leuchtmittel eine LED ist.Luminaire optics according to one of claims 1 to 5,
characterized in that the illuminant is an LED.
EP99119796A 1998-11-07 1999-10-06 Optical means for vehicle - preferably motor vehicle - lamps Withdrawn EP0999406A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19851374 1998-11-07
DE19851374A DE19851374C2 (en) 1998-11-07 1998-11-07 Luminaire optics for a motor vehicle lamp

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EP0999406A2 true EP0999406A2 (en) 2000-05-10
EP0999406A3 EP0999406A3 (en) 2001-07-25

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EP99119796A Withdrawn EP0999406A3 (en) 1998-11-07 1999-10-06 Optical means for vehicle - preferably motor vehicle - lamps

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US (1) US6305830B1 (en)
EP (1) EP0999406A3 (en)
DE (1) DE19851374C2 (en)

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DE19851374A1 (en) 2000-05-25
DE19851374C2 (en) 2001-06-21
US6305830B1 (en) 2001-10-23
EP0999406A3 (en) 2001-07-25

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