WO2014167154A1 - Light transmission and distribution device for vehicle headlights - Google Patents

Light transmission and distribution device for vehicle headlights Download PDF

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Publication number
WO2014167154A1
WO2014167154A1 PCT/ES2014/070259 ES2014070259W WO2014167154A1 WO 2014167154 A1 WO2014167154 A1 WO 2014167154A1 ES 2014070259 W ES2014070259 W ES 2014070259W WO 2014167154 A1 WO2014167154 A1 WO 2014167154A1
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WO
WIPO (PCT)
Prior art keywords
lenses
distribution device
light transmission
headlights
device applicable
Prior art date
Application number
PCT/ES2014/070259
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Spanish (es)
French (fr)
Inventor
Encarnacion Bermudez Linares
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Encarnacion Bermudez Linares
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Publication of WO2014167154A1 publication Critical patent/WO2014167154A1/en

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0009—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only
    • G02B19/0014—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only at least one surface having optical power
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source

Definitions

  • the present invention relates to a light transmission and distribution device applicable to vehicle headlights, constituting what is considered as an optical system in charge of transmitting and distributing the light emitted by light emitters such as lamps. or light bulbs, leds, etc.
  • the object of the invention is to provide an improvement in the transmission and distribution of light with an optical device, easier to manufacture, with lower manufacturing cost, with a significant weight reduction, and to reduce to a minimum amount the units that come out with default. By reducing the weights we also reduce the weight of the vehicle making it lighter and need less energy consumption.
  • the headlights of the vehicles include a lens within what is the optical system responsible for transmitting and distributing the light emitted by the headlight lamp, so that these lenses are currently too thick and too heavy, having problems at the time of being manufactured, resulting in manufacturing rejections greater than 50%, since due to the thickness too thick, it happens that when the material cools until the lens solidifies completely, it undergoes unwanted variations in its surface, appearing even bubbles inside and certain opacifications that decrease or alter the light transmittance, so the transmission and distribution of light is not optimal
  • the light transmission and distribution device applicable to headlights of vehicles comes to solve the problem set forth above, based on a simple but effective solution.
  • the device of the invention is based on the fact that instead of using a single lens, as traditionally occurs, two or more lenses of smaller thickness are incorporated, these being very easy to manufacture and with a very low number of rejections, with a lower weight of the set compared to optical systems that use a single lens, reducing the weight between 30% and 75%.
  • the lenses used in the device of the invention can be of mineral material such as glass, or in organic material such as plastic, (polycarbonate or PMMA, for example). Mineral lenses and organic lenses can also be used in combination, and these can be complete or sections of lenses, or even Fresnel-type lenses that at the end of the day are optical lenses, or lenses included in a piece or that are part of it.
  • the lenses used can be concave, convex, neutral or mixed, and optionally be able to include prisms or diaphragms or even other elements that were necessary within the optical system to be implemented.
  • an optical system is obtained, that is to say a light transmission and distribution device that will provide more precise and exact illumination than those offered by devices that use a single lens, the manufacturing cost of the lenses according to the invention being much lower than the price of the lenses currently used, with a lower weight of the optical system as a whole and with a much lower number of rejections in the manufacture of the lenses, with the particularity that if a lens is defective, there is only reject this lens and be able to keep the remaining ones, something that does not happen in conventional lenses where, as this is unique, if rejected, the entire optical system is rejected.
  • the device can be fixed, that is to say that the participating optical lenses can always maintain a constant fixed distance from the light source or light emitter, or they can even be mobile, varying some of the distances that exist from any of the lenses relative to the light source.
  • Another advantage of the device of the invention is that less space is needed inside the projector headlight itself.
  • Another advantage is that the lens or lenses when made in organic material are injected in a single injection cycle, because their thicknesses fall within the parameters for this type of manufacturing.
  • the lens or lenses used in the device can be of the same or different diameter and manufactured independently and then placed in their corresponding place, or that all of them are part of the same set or piece.
  • Figure 1 shows a schematic representation of what is the light transmission and distribution device applicable to headlights of vehicles object of the invention, two lenses of different diameter and the corresponding light emitting focus being seen.
  • Figure 2. Shows a view of the light transmission and distribution device applicable to a headlamp in which two lenses participate.
  • Figure 3. Shows a schematic representation like that of the previous figures, but in this case forming a unique set of the lens or lenses, with the light emitters, both lamps and LEDs.
  • the inventive device is intended for application preferably in the headlight (1) of a vehicle, which includes one or more light emitters (2), as shown in Figures 2 and 3, beacon which, as is conventional, will include a lens for the transmission and distribution of the light emitted by those light emitters (2).
  • the novelty of the invention is that the transmission and distribution of light is carried out by means of at least two lenses (3 and 4), which can be of the same or different diameter and can be materialized in an organic material or in a mineral material or mixed application, so that in any case the light emitted by the light-emitting bulb (5) is distributed evenly and efficiently through the lenses (3 and 4), which can be manufactured with a thickness much less than required by conventional lenses applicable to vehicle headlights.
  • the lenses (3 and 4) can be independent elements and manufactured in isolation and then placed inside the optical system assembly, or form a unique assembly with the optical system itself and the headlight as a whole, as shown in the figure 3.

Abstract

The invention relates to a light transmission and distribution device for vehicle headlights, a headlight including one or more light emitters in the form of lamps, LEDs or similar, comprising at least two or more optical lenses for transmitting and distributing the light emitted by the light emitting source corresponding to the vehicle headlight.

Description

DISPOSITIVO DE TRANSMISIÓN Y DISTRIBUCIÓN DE LUZ APLICABLE A FAROS DE  LIGHT TRANSMISSION AND DISTRIBUTION DEVICE APPLICABLE TO HEADLIGHTS
VEHICULOS  VEHICLES
D E S C R I P C I Ó N D E S C R I P C I Ó N
OBJETO DE LA INVENCIÓN La presente invención se refiere a un dispositivo de transmisión y distribución de luz aplicable a faros de vehículos, constituyendo lo que es considerado como un sistema óptico encargado de transmitir y distribuir la luz que emiten unos emisores de luz como pueden ser lámparas o bombillas, leds, etc . El objeto de la invención es proporcionar una mejora en la transmisión y distribución de la luz con un dispositivo óptico, más fácil de fabricar, con menor coste de fabricación, con una reducción de peso importante, y reducir a cantidades mínimas las unidades que salen con defecto. Al reducir los pesos reducimos también el peso del vehículo haciendo que este sea más ligero y necesite menos consumo energía . OBJECT OF THE INVENTION The present invention relates to a light transmission and distribution device applicable to vehicle headlights, constituting what is considered as an optical system in charge of transmitting and distributing the light emitted by light emitters such as lamps. or light bulbs, leds, etc. The object of the invention is to provide an improvement in the transmission and distribution of light with an optical device, easier to manufacture, with lower manufacturing cost, with a significant weight reduction, and to reduce to a minimum amount the units that come out with default. By reducing the weights we also reduce the weight of the vehicle making it lighter and need less energy consumption.
ANTECEDENTES DE LA INVENCIÓN BACKGROUND OF THE INVENTION
Como es sabido, los faros de los vehículos incluyen una lente dentro de lo que es el sistema óptico encargado de transmitir y distribuir la luz emitida por la lámpara del faro, de manera tal que actualmente esas lentes son demasiado gruesas y muy pesadas, teniendo problemas a la hora de ser fabricadas, dando lugar a rechazos en la fabricación superiores al 50% , ya que debido al espesor demasiado grueso, ocurre que al ir enfriándose el material hasta que solidifica totalmente la lente, ésta sufre variaciones no deseadas en su superficie, apareciendo incluso burbujas en su interior y ciertas opacificaciones que disminuyen o alteran la transmitancia de la luz , por lo que la transmisión y distribución de luz no es óptima As is known, the headlights of the vehicles include a lens within what is the optical system responsible for transmitting and distributing the light emitted by the headlight lamp, so that these lenses are currently too thick and too heavy, having problems at the time of being manufactured, resulting in manufacturing rejections greater than 50%, since due to the thickness too thick, it happens that when the material cools until the lens solidifies completely, it undergoes unwanted variations in its surface, appearing even bubbles inside and certain opacifications that decrease or alter the light transmittance, so the transmission and distribution of light is not optimal
Por otro lado, en la fabricación de este tipo de lentes gruesas es necesario llevar a cabo una inyección en dos o más ciclos, cuando se realizan en material orgánico , lo que genera problema de transparencia, burbujas, y en definitiva un gran número de rechazos como se decía con anterioridad. Otro tanto ocurre cuando se utilizan materiales minerales, que aunque se realizan en un único ciclo, el porcentaje de rechazo es muy elevado superando el 50% . Debido a que las lentes utilizadas actualmente en los faros de vehículos son demasiado gruesas ofrecen grandes problemas en su fabricación, lo que en definitiva da lugar a un elevadísimo número de piezas que son rechazadas por los defectos que presentan, por lo que el coste de estas lentes se incrementa en más del doble del precio que deberían tener, generando una gran cantidad de desperdicios y gastos de energía innecesarios por el elevado porcentaje de rechazo. On the other hand, in the manufacture of this type of thick lenses it is necessary to carry out an injection in two or more cycles, when they are made in organic material, which generates a problem of transparency, bubbles, and ultimately a large number of rejections how I know I said before. The same happens when mineral materials are used, which although they are carried out in a single cycle, the percentage of rejection is very high exceeding 50%. Because the lenses currently used in the headlights of vehicles are too thick they offer great problems in their manufacture, which ultimately results in a very high number of parts that are rejected by the defects they present, so the cost of these lenses are increased by more than double the price they should have, generating a large amount of waste and unnecessary energy costs due to the high percentage of rejection.
Al pesar más estas lentes hacen que el vehículo tenga más peso y por lo tanto necesite más gasto energético para su funcionamiento. DESCRIPCIÓN DE LA INVENCIÓN By weighing more these lenses make the vehicle have more weight and therefore need more energy expenditure for its operation. DESCRIPTION OF THE INVENTION
El dispositivo de transmisión y distribución de luz aplicable a faros de vehículos, según la invención, viene a resolver la problemática anteriormente expuesta, en base a una solución sencilla pero eficaz . The light transmission and distribution device applicable to headlights of vehicles, according to the invention, comes to solve the problem set forth above, based on a simple but effective solution.
Mas concretamente, el dispositivo de la invención se basa en que en lugar de utilizar una única lente, como ocurre tradicionalmente, se incorporan dos o más lentes de menor grosor, resultando éstas muy fáciles de fabricar y con un número de rechazos muy bajo, con un menor peso del conjunto frente a los sistemas ópticos que utilizan una única lente, reduciendo el peso entre un 30% y un 75%. More specifically, the device of the invention is based on the fact that instead of using a single lens, as traditionally occurs, two or more lenses of smaller thickness are incorporated, these being very easy to manufacture and with a very low number of rejections, with a lower weight of the set compared to optical systems that use a single lens, reducing the weight between 30% and 75%.
Las lentes que se utilizan en el dispositivo de la invención pueden ser de material mineral como el vidrio, o bien en material orgánico como plástico, ( policarbonato o PMMA, por ejemplo ). También se pueden utilizar combinadamente lentes minerales y lentes orgánicas, y ser éstas completas o secciones de lentes, o incluso lentes tipo Fresnel que al fin y al cabo son lentes ópticas, o lentes incluidas en una pieza o que forman parte de ella. The lenses used in the device of the invention can be of mineral material such as glass, or in organic material such as plastic, (polycarbonate or PMMA, for example). Mineral lenses and organic lenses can also be used in combination, and these can be complete or sections of lenses, or even Fresnel-type lenses that at the end of the day are optical lenses, or lenses included in a piece or that are part of it.
En cuanto a la configuración de las lentes utilizadas, pueden ser cóncavas, convexas, neutras o mixtas, y opcionalmente poder incluir prismas o diafragmas o incluso otros elementos que fuesen necesarios dentro del sistema óptico a implementar. De esta forma se obtiene un sistema óptico, es decir un dispositivo de transmisión y distribución de luz que proporcionará una iluminación más precisa y exacta que las que ofrecen los dispositivos que utilizan una única lente, siendo el coste de fabricación de las lentes según la invención muy inferior al precio de las lentes utilizadas actualmente, con un menor peso del conjunto del sistema óptico y con un número muy inferior de rechazos en la fabricación de las lentes, con la particularidad además de que si una lente sale defectuosa, no hay mas que rechazar esta lente y poder mantener las restantes, cosa que no ocurre en las lentes convencionales donde, como ésta es única, en caso de rechazarse, se rechaza todo el sistema óptico. As for the configuration of the lenses used, they can be concave, convex, neutral or mixed, and optionally be able to include prisms or diaphragms or even other elements that were necessary within the optical system to be implemented. In this way an optical system is obtained, that is to say a light transmission and distribution device that will provide more precise and exact illumination than those offered by devices that use a single lens, the manufacturing cost of the lenses according to the invention being much lower than the price of the lenses currently used, with a lower weight of the optical system as a whole and with a much lower number of rejections in the manufacture of the lenses, with the particularity that if a lens is defective, there is only reject this lens and be able to keep the remaining ones, something that does not happen in conventional lenses where, as this is unique, if rejected, the entire optical system is rejected.
Además, el dispositivo puede ser fijo, es decir que las lentes ópticas que participan pueden mantener siempre una distancia fija constante respecto de la fuente luminosa o emisor de luz, o incluso pueden ser móviles, variando alguna de las distancias que existen de alguna de las lentes respecto al foco emisor de luz. In addition, the device can be fixed, that is to say that the participating optical lenses can always maintain a constant fixed distance from the light source or light emitter, or they can even be mobile, varying some of the distances that exist from any of the lenses relative to the light source.
Otra ventaja que presenta el dispositivo de la invención es que se necesita menos espacio dentro del propio faro proyector. Another advantage of the device of the invention is that less space is needed inside the projector headlight itself.
Otra ventaja es que la lente o lentes cuando se realizan en material orgánico se inyectan en un solo ciclo de inyección, debido a que sus espesores entran dentro de los parámetros para este tipo de fabricación. Another advantage is that the lens or lenses when made in organic material are injected in a single injection cycle, because their thicknesses fall within the parameters for this type of manufacturing.
También cabe decir que la lente o lentes utilizadas en el dispositivo pueden ser del mismo o distinto diámetro y fabricarse independientemente para luego colocarse cada una en su lugar correspondiente, o que todas ellas formen parte de un mismo conjunto o pieza. It can also be said that the lens or lenses used in the device can be of the same or different diameter and manufactured independently and then placed in their corresponding place, or that all of them are part of the same set or piece.
DESCRIPCIÓN DE LOS DIBUJOS DESCRIPTION OF THE DRAWINGS
Para complementar la descripción que seguidamente se va a realizar y con objeto de ayudar a una mejor comprensión de las características del invento, de acuerdo con un ejemplo preferente de realización práctica del mismo, se acompaña como parte integrante de dicha descripción, un juego de dibujos en donde con carácter ilustrativo y no limitativo, se ha representado lo siguiente : La figura 1.- Muestra una representación esquemática de lo que es el dispositivo de transmisión y distribución de luz aplicable a faros de vehículos objeto de la invención, viéndose dos lentes de distinto diámetro y el correspondiente foco emisor de luz. La figura 2.- Muestra una vista del dispositivo de transmisión y distribución de luz aplicable a un faro en el que participan dos lentes. To complement the description that will then be made and in order to help a better understanding of the features of the invention, according to a preferred example of practical implementation thereof, a set of drawings is attached as an integral part of said description. where, for illustrative and non-limiting purposes, the following has been represented: Figure 1 shows a schematic representation of what is the light transmission and distribution device applicable to headlights of vehicles object of the invention, two lenses of different diameter and the corresponding light emitting focus being seen. Figure 2.- Shows a view of the light transmission and distribution device applicable to a headlamp in which two lenses participate.
La figura 3.- Muestra una representación esquemática como la de las figuras anteriores, pero en este caso formando un conjunto único de la lente o lentes, con los emisores de luz, tanto lámparas como leds. Figure 3.- Shows a schematic representation like that of the previous figures, but in this case forming a unique set of the lens or lenses, with the light emitters, both lamps and LEDs.
REALIZACIÓN PREFERENTE DE LA INVENCIÓN PREFERRED EMBODIMENT OF THE INVENTION
Como se puede ver en las figuras referidas, el dispositivo invención está previsto para su aplicación preferentemente en el faro (1) de un vehículo, que incluye uno o varios emisores de luz (2), como se representa en las figuras 2 y 3, faro que como es convencional incluirá una lente para la transmisión y distribución de la luz emitida por esos emisores de luz (2) . As can be seen in the aforementioned figures, the inventive device is intended for application preferably in the headlight (1) of a vehicle, which includes one or more light emitters (2), as shown in Figures 2 and 3, beacon which, as is conventional, will include a lens for the transmission and distribution of the light emitted by those light emitters (2).
Pues bien , la novedad de la invención es que la transmisión y distribución de luz se realiza mediante , al menos , dos lentes (3 y 4), que pueden ser del mismo o distinto diámetro y que pueden estar materializadas en un material orgánico o en un material mineral o aplicarse mixtamente, de manera que en cualquier caso la luz que emite el foco emisor de luz (5) se distribuye uniforme y eficazmente a través de las lentes (3 y 4), pudiendo fabricar éstas con un grosor muy inferior al requerido por las lentes convencionales aplicables a faros de vehículos. Well, the novelty of the invention is that the transmission and distribution of light is carried out by means of at least two lenses (3 and 4), which can be of the same or different diameter and can be materialized in an organic material or in a mineral material or mixed application, so that in any case the light emitted by the light-emitting bulb (5) is distributed evenly and efficiently through the lenses (3 and 4), which can be manufactured with a thickness much less than required by conventional lenses applicable to vehicle headlights.
Las lentes (3 y 4) pueden ser elementos independientes y fabricarse de forma aislada para luego colocarse dentro del conjunto del sistema óptico , o bien formar un conjunto único con el propio sistema óptico y el faro en su conjunto, como se representa en al figura 3. The lenses (3 and 4) can be independent elements and manufactured in isolation and then placed inside the optical system assembly, or form a unique assembly with the optical system itself and the headlight as a whole, as shown in the figure 3.

Claims

R E I V I N D I C A C I O N E S
1. - Dispositivo de transmisión y distribución de luz aplicable a faros de vehículos , faro que incluye uno o varios emisores de luz, que pueden ser lámparas, leds o similares, caracterizado porque incorpora, al menos, dos o mas lentes ópticas para la transmisión y distribución de la luz emitida por el foco emisor de luz correspondiente al faro del vehículo. 1. - Light transmission and distribution device applicable to vehicle headlights, headlight that includes one or more light emitters, which may be lamps, LEDs or the like, characterized in that it incorporates at least two or more optical lenses for transmission and distribution of the light emitted by the light emitting bulb corresponding to the headlight of the vehicle.
2. - Dispositivo de transmisión y distribución de luz aplicable a faros de vehículos, según reivindicación 1 , caracterizado porque las lentes son de material orgánico. 2. - Light transmission and distribution device applicable to headlights of vehicles, according to claim 1, characterized in that the lenses are of organic material.
3. - Dispositivo de transmisión y distribución de luz aplicable a faros de vehículos, según reivindicación 1 , caracterizado porque las lentes son de material mineral. 3. - Light transmission and distribution device applicable to headlights of vehicles, according to claim 1, characterized in that the lenses are made of mineral material.
4. - Dispositivo de transmisión y distribución de luz aplicable a faros de vehículos , según reivindicaciones anteriores, caracterizado porque incorpora simultáneamente lentes de material orgánico y lentes de material mineral. 4. - Light transmission and distribution device applicable to vehicle headlights, according to previous claims, characterized in that it simultaneously incorporates lenses of organic material and lenses of mineral material.
5. - Dispositivo de transmisión y distribución de luz aplicable a faros de vehículos, según reivindicaciones anteriores, caracterizado porque las lentes son completas . 5. - Light transmission and distribution device applicable to headlights of vehicles, according to previous claims, characterized in that the lenses are complete.
6. - Dispositivo de transmisión y distribución de luz aplicable a faros de vehículos, según reivindicaciones 1 a 4 , caracterizado porque las lentes son secciones . 6. - Light transmission and distribution device applicable to headlights of vehicles, according to claims 1 to 4, characterized in that the lenses are sections.
7. - Dispositivo de transmisión y distribución de luz aplicable a faros de vehículos, según reivindicaciones 1 a 4 caracterizado porque las lentes son de tipo Fresnel . 7. - Light transmission and distribution device applicable to vehicle headlights, according to claims 1 to 4, characterized in that the lenses are of the Fresnel type.
8. - Dispositivo de transmisión y distribución de luz aplicable a faros de vehículos, según reivindicaciones 1 a 4 caracterizado porque las lentes forman parte de un conjunto o pieza . 8. - Light transmission and distribution device applicable to headlights of vehicles, according to claims 1 to 4, characterized in that the lenses are part of a set or piece.
9.- Dispositivo de transmisión y distribución de luz aplicable a faros de vehículos, según reivindicaciones anteriores, caracterizado porque las lentes son convergentes. 9.- Light transmission and distribution device applicable to vehicle headlights, according to previous claims, characterized in that the lenses are convergent.
10.- Dispositivo de transmisión y distribución de luz aplicable a faros de vehículos, según reivindicaciones 1 a 7, caracterizado porque las lentes son divergentes. 10. Light transmission and distribution device applicable to headlights of vehicles, according to claims 1 to 7, characterized in that the lenses are divergent.
1 1. - Dispositivo de transmisión y distribución de luz aplicable a faros de vehículos, según reivindicaciones 1 a 7, caracterizado porque las lentes son divergentes y convergentes . 1 1. - Light transmission and distribution device applicable to headlights of vehicles, according to claims 1 to 7, characterized in that the lenses are divergent and convergent.
12. - Dispositivo de transmisión y distribución de luz aplicable a faros de vehículos, según reivindicaciones 1 a 6, caracterizado porque las lentes son neutras. 12. - Light transmission and distribution device applicable to vehicle headlights, according to claims 1 to 6, characterized in that the lenses are neutral.
13. - Dispositivo de transmisión y distribución de luz aplicable a faros de vehículos, según reivindicaciones anteriores, caracterizado porque las lentes son elementos independientes montadas dentro del faro en el que se aplican. 13. - Light transmission and distribution device applicable to headlights of vehicles, according to previous claims, characterized in that the lenses are independent elements mounted inside the headlight in which they are applied.
14. - Dispositivo de transmisión y distribución de luz aplicable a faros de vehículos, según reivindicaciones 1 a 10 , caracterizado porque las lentes forman parte del conjunto del faro donde montan igualmente los emisores de luz. 14. - Light transmission and distribution device applicable to headlights of vehicles, according to claims 1 to 10, characterized in that the lenses are part of the headlight assembly where the light emitters also mount.
15.- Dispositivo de transmisión y distribución de luz aplicable a faros de vehículos, según reivindicaciones anteriores, caracterizado porque las lentes van montadas estáticamente. 15.- Light transmission and distribution device applicable to headlights of vehicles, according to previous claims, characterized in that the lenses are mounted statically.
16.- Dispositivo de transmisión y distribución de luz aplicable a faros de vehículos, según reivindicaciones 1 a 12, caracterizado porque al menos una de las lentes es movible, permitiendo variar la distancia entre las mismas y el correspondiente foco o focos emisores de luz . 16.- Light transmission and distribution device applicable to headlights of vehicles, according to claims 1 to 12, characterized in that at least one of the lenses is movable, allowing the distance between them and the corresponding light source or spotlights to be varied.
PCT/ES2014/070259 2013-04-10 2014-04-02 Light transmission and distribution device for vehicle headlights WO2014167154A1 (en)

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ESU201330424 2013-04-10
ES201330424U ES1079153Y (en) 2013-04-10 2013-04-10 LIGHT TRANSMISSION AND DISTRIBUTION DEVICE APPLICABLE TO VEHICLE HEADLIGHTS

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR708094A (en) * 1930-03-28 1931-07-20 Anti-glare headlight system for motor vehicles
US2712060A (en) * 1953-05-14 1955-06-28 Francis M Johnson Combined dirigible spot and flood light for aircraft
US3849642A (en) * 1972-07-20 1974-11-19 Cibie Projecteurs Motor vehicle headlamps
GB2059565A (en) * 1979-10-02 1981-04-23 Cibie Projecteurs Beam deflection devices for vehicle headlamps
US5307247A (en) * 1992-09-22 1994-04-26 Autopal, Statni Podnik Headlamp for motor vehicles
US20040042085A1 (en) * 2002-08-28 2004-03-04 Hough Thomas A. Zoomable beamspreader for non-imaging illumination applications

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR708094A (en) * 1930-03-28 1931-07-20 Anti-glare headlight system for motor vehicles
US2712060A (en) * 1953-05-14 1955-06-28 Francis M Johnson Combined dirigible spot and flood light for aircraft
US3849642A (en) * 1972-07-20 1974-11-19 Cibie Projecteurs Motor vehicle headlamps
GB2059565A (en) * 1979-10-02 1981-04-23 Cibie Projecteurs Beam deflection devices for vehicle headlamps
US5307247A (en) * 1992-09-22 1994-04-26 Autopal, Statni Podnik Headlamp for motor vehicles
US20040042085A1 (en) * 2002-08-28 2004-03-04 Hough Thomas A. Zoomable beamspreader for non-imaging illumination applications

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ES1079153U (en) 2013-05-03

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