EP1726001B1 - Headlight lens for a motor vehicle headlight - Google Patents

Abstract

The present invention relates to a headlight lens for a vehicle headlight having a light source, in particular for a motor vehicle headlight, as well as a vehicle headlight, in particular a motor vehicle headlight, having a light source and a headlight lens. The headlight lens including a lens body is made of a transparent material, which includes a surface to face the light source and a surface to face away from the light source. The headlight lens having an emblem, on the surface to face the light source, having a basal surface, which, with respect to the surface to face the light source or with respect to an optical axis of the headlight lens, is sloped in such a way that light entering into the lens body through the surface to face away from the light source parallel to the optical axis of the headlight lens is subject to a total reflection at the basal surface.

Description

The invention relates to a headlight lens for a vehicle headlight, in particular for a motor vehicle headlight, and a vehicle headlight.

Such a headlight lens is for example from the WO 02/31543 A1 which discloses a headlamp lens of a vehicle for installation in front of a light source in a headlamp housing, the lens comprising outsides bounding a solid body of a transparent material, the solid body including means for refracting the light inside the solid body a certain distance from the outside.

An aforementioned headlight lens is also from the WO 03/074251 A1 , of the DE 36 02 262 C2 and the DE 100 52 653 A1 known, the DE 36 02 262 C2 discloses a headlamp lens having a surface convexly curved on at least one side and means for correcting chromatic aberrations of a light beam, wherein the means for correcting chromatic aberrations are formed by the at least one convexly curved surface formed aspherically and in a plurality of aspherically formed partial surfaces is divided with different shape or curvature.

The DE 299 12 504 U1 discloses a vehicle headlamp with a dish-shaped reflector, with a light source associated with the reflector, with a lens arranged in a beam path of the reflector, which has a planar surface facing the reflector and an opposite convex surface, and with a cover plate adjacent to the convex surface of the lens, wherein the lens is provided only in a central region of its flat surface with a sandblasting surface structure which reflects from outside into the headlamp and the lens entering light rays of the sun and diffuses diffuses.

Other vehicle headlights are for example from the DE 199 33 766 A1 , of the DE 101 18 687 A1 and the DE 198 29 586 A1 known.

A generic headlight lens with an emblem is off EP-A-1 254 810 known.

Due to the strong influence of the vehicle design on the image of a motor vehicle, automotive headlights are subject to influences of the design more than ever before. Therefore, in the design and construction of headlamps for motor vehicles appropriate boundary conditions must be considered. Due to the free-form surface technology in modern vehicle headlamps conventionally structured Cover or diffuser discs are replaced by clear glass covers. However, this also implies the need to design the interior of the headlamp according to design criteria, which in turn causes lighting problems, such as a caused by deflected light components so-called self-glare of a driver of the motor vehicle.

These constraints in the manufacture of vehicle headlamps include the desire for vehicle headlamps to perform a native function or custom design specifications such that the make or type of the vehicle is recognizable when viewing the vehicle headlamps.

It is an object of the invention to provide by means of a vehicle headlamp a origin function or custom design specifications, without restricting the functionality of the vehicle headlamp as a lighting device.

The aforementioned object is achieved by a headlight lens for a vehicle headlight with a light source, in particular for a motor vehicle headlight, the headlight lens comprising a lens body made of a transparent material, which can be turned into a light source, e.g. essentially planar, face and one to be turned away from the light source, e.g. substantially convex surface, and wherein the headlight lens on the surface to face the light source has an emblem with a base surface inclined to the light source facing surface or to an optical axis of the headlight lens such that the surface to be turned away from the light source the optical axis of the headlight lens in the lens body penetrating light at the base of a total reflection subject. An emblem according to the invention may e.g. be a lettering, a geometric figure, an arrangement of geometric figures or any other symbol.

A base according to the invention has in particular a constant inclination. However, the inclination of the base may also vary slightly, if necessary, within the limits set by the claims. For example, it may be provided that the inclinations of the base area at opposite ends of the base area differ by 5 ° or 10 °. A base area according to the invention has in particular an extension of at least 10 mm ² . A base area in the sense of the invention is in particular a macrostructure, not a microstructure.

In an advantageous embodiment of the invention, the base surface is offset from the light source surface to be addressed between 0.2mm and 6mm (in the direction of the optical axis).

In a further advantageous embodiment of the invention, the emblem projects into the lens body or in relief over a. Part of the surface to be turned to the light source or the surface to be averted from the light source. In further advantageous Embodiment of the invention, the emblem is arranged in a recess in the lens body and protrudes in particular in relief over a bottom surface of the recess addition.

In a further advantageous embodiment of the invention, a projection of the base area to the surface to be turned over to the light source covers less than 30% of the area to face the light source or a projection of the base area onto the surface to be averted from the light source less than 30% of the area to be averted from the light source.

In a further advantageous embodiment of the invention, the face to be turned to the light source and / or the surface and / or areas of emblems or depressions facing the light source have an area with a roughness of at least 0.05 μm, in particular at least 0.08 μm. The area with a roughness of at least 0.05 .mu.m, in particular at least 0.08 .mu.m, in particular with a light transmission at the surface of at least 90%, can emblem on the face to be turned to the light source and / or on the surface to be turned away from the light source , in particular annular, enclose. Alternatively or additionally, at least a substantial portion of the surface facing the light source has a roughness of at least 0.05 .mu.m, in particular at least 0.08 .mu.m, in particular with a light transmission at the surface of at least 90%, when the emblem is on the light source averted surface is arranged.

A light transmission at the surface of at least 90% with a roughness of at least 0.05 .mu.m, in particular at least 0.08 .mu.m, can be achieved in that the headlight lens by means of a in the corresponding areas, e.g. is sandblasted by sandblasting, grinding or spark erosion, roughened form.

The aforementioned object is also achieved, in particular in connection with the aforementioned features, by a headlight lens for a vehicle headlight with a light source, in particular for a motor vehicle headlight, the headlight lens comprising a lens body made of a transparent material, which is one of the. Light source, e.g. essentially planar, face and one to be turned away from the light source, e.g. substantially convex surface, and wherein the headlight lens on the surface to face the light source has an emblem with a base surface which faces the light source surface by an angle between 25 ° and 80 °, in particular between 35 ° and 60 °, or with respect to an optical axis of the headlight lens by an angle between 10 ° and 65 °, in particular between. 30 ° and 55 °, is inclined.

The aforementioned object is also achieved, in particular in conjunction with the aforementioned features, by a headlight lens for a vehicle headlight with a light source, in particular for a motor vehicle headlight, wherein the headlight lens comprises a lens body made of a transparent material which, for example, is substantially planar , Area and one of the Wherein the headlamp lens on the surface facing the light source or the surface to be averted from the light source has an emblem with a base area which is opposite to the surface to be turned by the light source or the surface to be averted from 0 to 0; 2mm and 6mm (in the direction of the optical axis) is offset.

The aforementioned object is also achieved by a headlight lens for a vehicle headlight with a light source, in particular for a motor vehicle headlight, the headlight lens comprising a lens body of a transparent material comprising a substantially planar surface and a substantially convex surface, and wherein the headlight lens on the substantially planar surface has an emblem with a base which is inclined relative to the substantially flat surface or with respect to an optical axis of the headlight lens such that penetrates through the substantially convex surface along the optical axis of the headlight lens in the lens body penetrating light the base is subject to total reflection. An emblem according to the invention may e.g. be a lettering, a geometric figure, an arrangement of geometric figures or any other symbol.

In an advantageous embodiment of the invention, the base surface is offset from the substantially flat surface between 0.2 mm and 6 mm (in the direction of the optical axis).

In a further advantageous embodiment of the invention, the emblem projects into the lens body or in relief over a portion of the substantially planar surface or the substantially convex surface also. In a further advantageous embodiment of the invention, the emblem is arranged in a recess in the lens body and protrudes in particular in relief over a bottom surface of the recess.

In a further advantageous embodiment of the invention, a projection of the base area on the substantially planar surface covers less than 30% of the substantially planar surface or a projection of the base surface on the substantially convex surface less than 30% of the substantially convex surface.

In a further advantageous embodiment of the invention, the substantially planar surface and / or the substantially convex surface and / or surfaces of emblems or depressions has an area with a roughness of at least 0.05 .mu.m, in particular at least 0.08 .mu.m, in particular in a Light transmission at the surface of at least 90%, on. The region with a roughness of at least 0.05 .mu.m, in particular at least 0.08 .mu.m, can enclose the emblem, in particular annular, on the essentially plane surface and / or on the essentially convex surface. Alternatively or additionally, the substantially planar surface has, at least to a substantial extent, a roughness of at least 0.05 μm, in particular at least 0.08 .mu.m, in particular with a light transmission at the surface of at least 90%, when the emblem is arranged on the substantially convex surface.

The aforementioned object is also achieved, in particular in conjunction with the aforementioned features, by a headlight lens for a vehicle headlight with a light source, in particular for a motor vehicle headlight, the headlight lens comprising a lens body made of a transparent material having a substantially planar surface and a substantially planar surface convex surface, and wherein the headlight lens on the substantially planar surface has an emblem with a base surface, which is opposite to the substantially flat surface by an angle between 25 ° and 80 °, in particular between 35 ° and 60 °, or with respect to an optical Axis of the dummy lens is inclined by an angle between 10 ° and 65 °, in particular between 30 ° and 55 °.

The aforementioned object is also achieved, in particular in conjunction with the aforementioned features, by a headlight lens for a vehicle headlight with a light source, in particular for a motor vehicle headlight, the headlight lens comprising a lens body made of a transparent material having a substantially planar surface and a substantially planar surface convex surface, and wherein the headlamp lens on the substantially planar surface or substantially convex surface has an emblem with a base surface facing the substantially planar surface or substantially convex surface between 0.2mm and 6mm (in the direction of the optical axis ) is offset.

The aforementioned inclined base surfaces advantageously have a roughness of less than 0.08 μm, in particular less than 0.05 μm.

It may be provided in an advantageous embodiment that the bottom surfaces of depressions of the substantially planar surface or the light source surface to be addressed, which are not assigned to the base area, an area with a roughness of at least 0.05 .mu.m, in particular at least 0.08 μm, in particular with a light transmission at the surface of at least 90%.

Roughness in the sense of the invention should in particular be defined as R _a , in particular according to ISO 4287.

Motor vehicle in the sense of the invention is in particular a land vehicle which can be used individually in road traffic. Motor vehicles according to the invention are not limited in particular to land vehicles with internal combustion engine.

Fig. 1

ein Kraftfahrzeug,

Fig. 2

eine schematische Darstellung eines Fahrzeugscheinwerfers,

Fig. 3

ein Ausführungsbeispiel für eine Scheinwerferlinse für einen Fahrzeugscheinwerfer,

Fig. 4

die Scheinwerferlinse gemäß Fig. 3 in einer rückwärtigen Ansicht,

Fig. 5

einen Querschnitt der Scheinwerferlinse gemäß Fig. 3 und Fig. 4,

Fig. 6

einen weiteren Querschnitt der Scheinwerferlinse gemäß Fig. 3 und Fig. 4,

Fig. 7

einen weiteren Querschnitt der Scheinwerferlinse gemäß Fig. 3 und Fig. 4,

Fig. 8

einen weiteren Querschnitt der Scheinwerferlinse gemäß Fig. 3 und Fig. 4,

Fig.9

ein weiteres Ausführungsbeispiel für eine Scheinwerferlinse für einen Fahrzeugscheinwerfer,

Fig. 10

die Scheinwerferlinse gemäß Fig. 9 in einer rückwärtigen Ansicht,

Fig. 11

einen Querschnitt der Scheinwerferlinse gemäß Fig. 9 und Fig. 10,

Fg. 12

einen weiteren Querschnitt der Scheinwerferlinse gemäß Fig. 9 und Fig. 10,

Fig. 13

ein weiteres Ausführungsbeispiel für eine Scheinwerferlinse für einen Fahrzeugscheinwerfer,

Fig. 14

ein weiteres Ausführungsbeispiel für eine Scheinwerferlinse für einen Fahrzeugscheinwerfer,

Fig. 15

ein weiteres Ausführungsbeispiel für eine Scheinwerferlinse für einen Fahrzeugscheinwerfer,

Fig. 16

die Scheinwerferlinse gemäß Fig. 15 in einer rückwärtigen Ansicht,

Fig. 17

ein weiteres Ausführungsbeispiel für eine Scheinwerferlinse für einen Fahrzeugscheinwerfer,

Fig. 18

die Scheinwerferlinse gemäß Fig. 17 in einer rückwärtigen Ansicht,

Fig. 19

einen Querschnitt der Scheinwerferlinse gemäß Fig. 17 und Fig. 18,

Fig. 20

ein weiteres Ausführungsbeispiel für eine Scheinwerferfinse für einen Fahrzeugscheinwerfer und

Fig. 21

einen Querschnitt der Scheinwerferlinse gemäß Fig. 20.

Further advantages and details emerge from the following description of exemplary embodiments. Showing:

Fig. 1

a motor vehicle,

Fig. 2

a schematic representation of a vehicle headlamp,

Fig. 3

an embodiment of a headlight lens for a vehicle headlight,

Fig. 4

the headlight lens according to Fig. 3 in a rear view,

Fig. 5

a cross section of the headlight lens according to FIG. 3 and FIG. 4 .

Fig. 6

a further cross section of the headlight lens according to FIG. 3 and FIG. 4 .

Fig. 7

a further cross section of the headlight lens according to FIG. 3 and FIG. 4 .

Fig. 8

a further cross section of the headlight lens according to FIG. 3 and FIG. 4 .

Figure 9

a further embodiment of a headlight lens for a vehicle headlight,

Fig. 10

the headlight lens according to Fig. 9 in a rear view,

Fig. 11

a cross section of the headlight lens according to FIGS. 9 and 10 .

Fig. 12

a further cross section of the headlight lens according to FIGS. 9 and 10 .

Fig. 13

a further embodiment of a headlight lens for a vehicle headlight,

Fig. 14

a further embodiment of a headlight lens for a vehicle headlight,

Fig. 15

a further embodiment of a headlight lens for a vehicle headlight,

Fig. 16

the headlight lens according to Fig. 15 in a rear view,

Fig. 17

a further embodiment of a headlight lens for a vehicle headlight,

Fig. 18

the headlight lens according to Fig. 17 in a rear view,

Fig. 19

a cross section of the headlight lens according to FIGS. 17 and 18 .

Fig. 20

a further embodiment of a headlight fin for a vehicle headlight and

Fig. 21

a cross section of the headlight lens according to Fig. 20 ,

Fig.1 shows a motor vehicle 100 with a in Fig. 2 Vehicle headlight 1 shown schematically with a light source 10 for generating light, a reflector 12 for reflecting light generated by the light source 10 and a diaphragm 14. The vehicle headlamp 1 also includes a headlight lens 2, 2A, 2B, 2C for changing the beam direction of means the light source 10 produced light, wherein the headlight lens 2, 2A, 2B, 2C comprises a lens body 3 made of a transparent material, the light source 10 facing a substantially planar surface 5 and the light source 10 facing away, substantially convex surface 4 includes , The headlight lens 2, 2A, 2B, 2C also includes an (optional) edge 6 by means of which the headlight lens 2, 2A, 2B, 2C in the vehicle headlight 1 can be fastened.

Fig. 3 shows the headlight lens 2, 2A, 2B, 2C in an exemplary embodiment in a plan view in the direction of in Fig. 2 illustrated arrow 16 and Figure 4 the headlight lens 2, 2A, 2B, 2C in a plan view in the direction of in Fig. 2 Arranged on the light source 10, substantially flat surface 5 of the headlight lens 2, 2A, 2B, 2C is an emblem 20, 20A, 20B, 20C arranged in an exemplary embodiment as a lettering.

Fig. 5 shows a cross section of the headlight lens 2 along the section line AA according to Fig. 4 , In the headlight lens 2, the emblem 20 protrudes in relief over the light source 10 facing, substantially planar surface 5 with a height H of between 0.2mm and 6mm, in the present embodiment 2mm out. That is, a base surface 25 of the emblem 20 is opposite to the light source 10 facing, substantially flat surface 5 between 0.2mm and 6mm (in the direction of an optical axis of the headlight lens 2, not shown), in the present embodiment 2mm offset.

Fig. 6 shows a cross section of the headlight lens 2A along the section line AA according to Fig. 4 , In the headlamp lens 2A, the emblem 20A is disposed in a recess 21A in the lens body 3, and protrudes, in particular, in relief over a bottom surface 22A of the recess 21A. The recess 21A has a depth T between 0.2mm and 6mm, in the present embodiment 4mm. The emblem 20A is between 0.2mm and 6mm, in the present embodiment 2mm, high, so that a base 25A of the emblem 20A is below the light source 10 facing, substantially planar surface 5.

Fig. 7 shows a cross section of the headlight lens 2B along the section line AA according to Fig. 4 , In the headlamp lens 2B, the emblem 20B is disposed in a recess 21B in the lens body 3, and protrudes, in particular, in relief over a bottom surface 22B of the recess 21B. The recess 21B is between 0.2mm and 6mm, in the present embodiment 2mm, deep. The emblem 20B is between 0.2mm and 6mm, in the present embodiment 2mm, high, so that a base 25B of the emblem 20B terminates with the substantially flat surface 5 facing the light source 10.

Fig. 8 shows a cross section of the headlight lens 2C along the section line AA according to Fig. 4 , wherein the emblem 20C projects between 0.2 mm and 6 mm, in the present exemplary embodiment 2 mm deep into the lens body 3, so that a base area 25C of the emblem 20C faces the light source 10 facing, substantially flat surface 5 between 0.2 mm and 6mm (in the direction of an optical axis, not shown, the headlight lens 2C), in the present embodiment 2mm, is offset.

It can be provided that the base surfaces 25, 25A, 25B, 25C and / or the bottom surfaces 22A, 22B have an area with a roughness of at least 0.05 μm, in particular at least 0.08 μm.

Fig. 9 shows a particularly advantageous embodiment of a headlight lens 30, 30A for use in the vehicle headlight 1 as an alternative to Headlamp lenses 2, 2A, 2B, 2C in a plan view in one of the direction of in Fig. 2 shown arrow 16 corresponding direction and Fig. 10 the headlight lens 30, 30A in a plan view in one of the direction of in Fig. 2 illustrated arrow 15 corresponding direction, wherein - as in relation to the other figures - like reference numerals designate the same or similar elements. On the light source 10 facing, substantially flat surface 5 of the headlight lens 30, 30A is an emblem 31, 31A arranged in an exemplary embodiment as a lettering.

Fig. 11 shows a cross section of the headlight lens 30 along the section line BB according to Fig. 10 , In the headlight lens 30, the emblem 31 is arranged in a recess 32 in the lens body 3 and protrudes in particular relief-like over a bottom surface 33 of the recess 32 also. The recess 32 is between 0.2mm and 6mm, in the present embodiment 5mm, deep. The emblem 31 has a base surface 35 which is inclined relative to the light source 10 facing, substantially flat surface 5 or with respect to an optical axis 38 of the headlight lens 30 such that the convex surface 4 facing away from the light source 10 along the optical axis 38 of the headlight lens 30 in the lens body 3 penetrating light at the base 35 is subject to total reflection. In particular, it is provided that the base surface 35 relative to the light source 10 facing, substantially flat surface 5 by an angle α between 25 ° and 80 °, in particular between 35 ° and 60 °, or with respect to the optical axis 38 of the headlight lens 30 to a Angle β between 10 ° and 65 °, in particular between 30 ° and 55 °, is inclined. In the present embodiment, it is provided that the base surface 35 relative to the light source 10 facing, substantially flat surface 5 inclined by an angle α of 42.5 ° and with respect to the optical axis 38 of the headlight lens 30 by an angle β of 47.5 ° is. The exemplary embodiment of the headlight lens 30 has a shoulder 39 between the base surface 35 and the bottom surface 33, which can also be omitted so that the base surface 35 and the bottom surface 33 touch each other at specific locations.

It can be provided that the bottom surfaces 33 have a region with a roughness of at least 0.05 μm, in particular at least 0.08 μm.

Fig. 12 shows a cross section of the headlight lens 30A along the section line BB according to Fig. 10 , In the headlight lens 30A, the emblem 31A protrudes into the lens body 3, but advantageously at no point more than 6mm. The emblem 31A has a base surface 35A, which is inclined relative to the light source 10 facing, substantially flat surface 5 or with respect to an optical axis 38A of the headlight lens 30A such that by the light source 10 facing away, convex surface 4 along the optical axis 38A of the headlight lens 30A is subject to light entering the lens body 3 at the base 35A of total reflection. In particular, it is provided that the base surface 35 relative to the light source 10, 10 facing, substantially flat surface 5 at an angle α between 25 ° and 80 °, in particular between 35 ° and 60 °, or with respect to the optical axis 38A of the headlight lens 30A to an angle β between 10 ° and 65 °, in particular between 30 ° and 55 °, is inclined. In the present embodiment, it is provided that the base surface 35A relative to the light source 10 facing, substantially planar surface 5 by an angle α of 42 ° and relative to the optical axis 38A of the dummy lens 30A by an angle β of 48 ° inclined. The embodiment of the headlight lens 30A has a shoulder 39A between the base surface 35A and the substantially planar surface 5 facing the light source 10, which may also be omitted so that the base surface 35 and the substantially planar surface facing the light source 10 5 touch in certain places.

Due to the inclined arrangement of the base surfaces 35 and 35A of the emblems 31 and 31A is achieved that the emblems 31 and 31A in a plan view according to Fig. 9 a - symbolized by the thick hatching - silvery coloration and thus are clearly visible. In a plan view according to Fig. 10 the emblems 31 and 31A are transparent except for their edges, so that only a negligible caused by the emblems 31 and 31A change of the beam path of light generated by the light source 10 occurs.

Fig. 13 shows an advantageous embodiment of a headlight lens 40 for use in the vehicle headlight 1 as an alternative to the headlight lenses 2, 2A, 2B, 2C in a plan view in one of the direction of in Fig. 2 Arrow 15 corresponding direction, wherein - as in relation to the other figures - the same reference numerals as in the aforementioned figures designate the same or similar elements. On the light source 10 facing, substantially flat surface 5 of the headlight lens 40, an emblem 41 is arranged in an exemplary embodiment as a lettering. The emblem 41 may be configured according to the emblem 20, 20A, 20B, 20C, 31 or 31A. The substantially planar surface 5 facing the light source 10 comprises a region 42 having a (surface) roughness of at least 0.05 μm, in particular at least 0.08 μm, in particular with a light transmission at the surface of at least 90%. In the present embodiment, the area has a roughness of 0.33 microns with a light transmission at the surface of at least 90%.

Fig. 14 shows an advantageous embodiment of a headlight lens 50 for use in the vehicle headlight 1 as an alternative to the headlight lenses 2, 2A, 2B, 2C in a plan view in one of the direction of in Fig. 2 illustrated arrow 16 corresponding direction, wherein - as in relation to the other figures - like reference numerals designate the same or similar elements. On the light source 10 facing, substantially flat surface 5 of the headlight lens 50, an emblem 51 is arranged in an exemplary embodiment as a logo. The emblem 51 may be configured according to the emblem 31 or 31A. The substantially convex surface 5 facing away from the light source 10 comprises a region 52 surrounding the emblem 51 with a (surface) roughness of at least 0.05 .mu.m, in particular at least 0.08 .mu.m, in particular with a light transmission at the surface of at least 90%. In the present In the exemplary embodiment, the region has a roughness of 0.45 μm with a light transmission at the surface of at least 90%. It can be provided that the light source 10 facing, substantially planar surface 5 of the headlight lens 50 has a region corresponding area 42 with a (surface) roughness of at least 0.05 .mu.m, in particular at least 0.08 microns, especially in a Light transmission at the surface of at least 90%.

It may be provided that the bottom surfaces 22A, 22B and / or 33 wholly or partially a (surface) roughness of at least 0.05 .mu.m, in particular at least 0.08 .mu.m, in particular at a light transmission at the surface of at least 90%, exhibit.

Fig. 15 shows a particularly advantageous embodiment of a headlight lens 60 for use in the vehicle headlight 1 as an alternative to the headlight lenses 2, 2A, 2B, 2C in a plan view in one of the direction of in Fig. 2 shown arrow 16 corresponding direction and Fig. 16 the headlight lens 60 in a plan view in one of the direction of in Fig. 2 shown arrow 15 corresponding direction. On the light source 10 facing, substantially planar surface 5 of the headlight lens 60, an emblem 61 is arranged in an exemplary embodiment as limited by designated by reference numerals 65, 66, 67, 68 boundary surfaces prism body.

The emblem 60 may be similar to the emblem 30A in FIG Fig. 12 - Protrude into the lens body or in relief over the light source 10 facing, substantially planar surface 5 or part of the light source 10 facing, substantially flat surface 5 protrude. The emblem 60 may also be disposed in a recess in the lens body, in this embodiment, similar to the emblem 30 in FIG Fig. 11 - Advantageously protrudes in relief over a bottom surface of the recess.

The boundary surfaces 65, 66, 67, 68 are opposite the light source 10 facing, substantially flat surface 5 or inclined relative to an optical axis of the headlight lens 60 such that by the light source 10 facing away, convex surface 4 along the optical axis of the headlight lens 60 in the lens body 3 penetrating light at the boundary surfaces 65, 66, 67, 68 is subject to total reflection. In particular, it is provided that the boundary surfaces 65, 66, 67, 68 with respect to the light source 10 facing, substantially flat surface 5 by an angle between 25 ° and 80 °, in particular between 35 ° and 60 °, or with respect to the optical axis of Headlight lens 60 by an angle between 10 ° and 65 °, in particular between 30 ° and 55 °, are inclined. In the present embodiment, it is provided that the boundary surfaces 65, 66, 67, 68 with respect to the light source 10 facing, substantially flat surface 5 are inclined by an angle of 47 ° and with respect to the optical axis of the headlight lens 60 by an angle of 43 ° ,

Due to the inclined arrangement of the boundary surfaces 65, 66, 67, 68 is achieved that the emblem 61 in a plan view according to Fig. 15 a - symbolized by the thick hatching - silvery coloration and thus is clearly visible. In a plan view according to Fig. 16 the emblem 61, however, transparent to the edges of the boundary surfaces 65, 66, 67, 68, so that only a negligible caused by the emblem 61 change of the beam path of light generated by the light source 10 occurs.

It can be provided that the essentially flat surface 5 facing the light source 10 and / or the essentially convex surface 4 facing away from the light source 10 has an area with a roughness of at least 0.05 μm, in particular at least 0.08 μm, have or have. This area encompasses the substantial part of the essentially flat surface 5 facing the light source 10 and / or the substantial part of the substantially light-emitting surface 10 facing away from the light source 10, but not the boundary surfaces 65, 66, 67, 68th

Figure 17 shows another embodiment of a headlight lens 70 for use in the vehicle headlight 1 alternatively to the headlight lenses 2, 2A, 2B, 2C in a plan view in one of the direction of in Fig. 2 arrow 16 corresponding direction, and Fig. 18 shows the headlight lens 70 in a plan view in one of the direction of in Fig. 2 illustrated arrow 15 corresponding direction, wherein - as in relation to the other figures - like reference numerals designate the same or similar elements. On the light source 10 facing away, substantially convex surface 4 of the headlight lens 70, an emblem 71 is arranged in an exemplary embodiment as a lettering. Fig. 19 shows a cross section of the headlight lens 70 along the section line CC according to Fig. 18 , In the headlight lens 70, the emblem 71 protrudes into the lens body 3, but advantageously at no point more than 6mm inside. The substantially planar surface 5 facing the light source 10 has a region 72 with a (surface) roughness of at least 0.05 μm, in particular at least 0.08 μm, in particular with a light transmission at the surface of at least 90%. In the present embodiment, the region 72 has a roughness of 0.25 microns with a light transmission at the surface of at least 90%.

Fig. 20 FIG. 11 shows another embodiment of a headlight lens 80 for use in the vehicle headlight 1 as an alternative to the headlight lenses 2, 2A, 2B, 2C in a plan view in one of the directions of the in. FIG Fig. 2 illustrated arrow 16 corresponding direction, wherein - as in relation to the other figures - like reference numerals designate the same or similar elements. Fig. 21 shows a cross section of the headlight lens 80 along the section line DD according to Fig. 20 , On the light source 10 facing, substantially flat surface 5 of the headlight lens 80 is in a recess 89, an emblem 81 in an exemplary embodiment as a beetle with a trunk 82, legs 83, a head 84 and ladybug points 85 arranged.

The trunk 82, legs 83, head 84 and ladybug spots 85 have different heights and / or different surface roughnesses, in particular of at least 0.05 μm, in particular at least 0.08 μm. The ladybird points 85 each have a base surface 90 which is inclined relative to the light source 10 facing, substantially flat surface 5 or with respect to an optical axis 88 of the headlight lens 80 such that by the light source 10 facing away, convex surface 4 along the optical Axis 88 of the headlight lens 80 in the lens body 3 penetrating light at the base surfaces 90 is subject to total reflection. In particular, it is provided that the base surfaces 90 relative to the light source 10 facing, substantially flat surface 5 by an angle α between 25 ° and 80 °, in particular between 35 ° and 60 °, or with respect to the optical axis 88 of the headlight lens 80 to a Angle β between 10 ° and 65 °, in particular between 30 ° and 55 °, are inclined. In the present embodiment, it is provided that the base surfaces 90 relative to the light source 10 facing, substantially flat surface 5 by an angle α of 45 ° and relative to the optical axis 88 of the headlight lens 80 by an angle β of 45 ° inclined.

Due to the inclined arrangement of the base surfaces 90 of the ladybug points 85 is achieved that the ladybug points 85 in a plan view according to Fig. 20 a - symbolized by the thick hatching - silvery coloration and thus are clearly visible. In a plan view from behind the ladybug dots 85 are transparent to their edges, so that only a negligible, caused by the ladybug points 85 change in the beam path of light generated by the light source 10 occurs.

It can be provided that one of the bottom surfaces 91 of the depression 89 has an area with a roughness of at least 0.05 μm, in particular at least 0.08 μm, in particular with a light transmission at the surface of at least 90%.

In particular, it is provided that a projection of the base areas 25, 25A; 25B, 25C, 35, 35A, 90 and the boundary surfaces 65, 66, 67, 68 to the light source 10 to be turned, substantially planar surface 5 less than 30% of the light source 10 to be turned, essentially flat surface 5 or that Projection of the base surfaces 25, 25A, 25B, 25C, 35, 35A, 90 and the boundary surfaces 65, 66, 67, 68 on the light source 10 to be averted, substantially convex surface 4 less than 30% of the light source 10 averted, in covering substantially convex surface 4.

The light plane 10 to be addressed, substantially flat surface 5 can also be configured somewhat curved. A substantially planar surface according to the invention may also comprise a convexly or concavely curved surface whose However, the radius of curvature, in particular by more than twice, is greater than the radius of curvature of the substantially convex surface.

The elements, dimensions, angles and area ratios in the figures are drawn in the light of simplicity and clarity and are not necessarily drawn to scale. Thus, e.g. the magnitudes of some elements, dimensions, angles, and area ratios are exaggerated from other elements, dimensions, angles, and area ratios, respectively, to aid in understanding the embodiments of the present invention.

Claims (28)

1. Headlight lens (30, 30A, 50, 60, 80) for a motor vehicle headlight (1) having a light source (10), in particular for a motor vehicle headlight, wherein the headlight lens (30, 30A, 50, 60, 80) comprises a lens body (3) of transparent material, which lens body includes a surface (5) adapted to be made facing the light source (10) and a surface (4) adapted to be made facing away from the light source (10), and wherein the headlight lens (30, 30A, 50, 60 80), on the surface (5) adapted to be made facing the light source (10), has an emblem (31, 31A, 51, 61, 81) provided with a base area (35, 35A, 90), characterised in that

   - the base area (35, 35A, 90), with respect to the surface (5) adapted to be made facing the light source (10) or with respect to the optical axis (38, 38A, 88) of the headlight lens (30, 30A, 50, 60, 80), is inclined such that light entering the lens body (3) along the optical axis (38, 38A, 88) of the headlight lens (30, 30A, 50, 60, 80) through the surface (4) adapted to be made facing away from the light source (10) is subjected to total reflexion at the base area (35, 35A, 90),
   or that

   - the base area (35, 35A, 90), with respect to the surface (5) adapted to be made facing the light source (10), is inclined by an angle (α) of between 25° and 80°, in particular of between 35° and 60°, or, with respect to the optical axis (38, 38A, 88) of the headlight lens (30, 30A, 50, 60, 80), by an angle (β) of between 10° and 65°, in particular of between 30° and 55°.
2. Headlight lens (30, 30A) as claimed in claim 1, characterised in that the base area (35, 35A), with respect the surface (5) adapted to be made facing the light source (10), is offset by between 0,2 mm and 6 mm.
3. Vehicle headlight (1), characterised in that it includes a headlight lens (30, 30A, 50, 60, 80) as claimed in claim 1 or claim 2.
4. Vehicle headlight (1), in particular motor vehicle headlight, including a headlight lens (2, 2A, 2B, 2C, 40, 70), a light source (10), a reflector (12) for reflecting light to be generated by the light source (10), and a shield (14) arranged between the light source (10) and the headlight lens (2, 2A, 2B, 2C, 40, 70), wherein the headlight lens (2, 2A, 2B, 2C, 40, 70) comprises a lens body (3) of transparent material, which body comprises a surface (5) facing the light source (10) and a surface (4) facing away from the light source (10), and has an emblem (20, 20A, 20B,20C, 41, 71) provided with a base area (35, 35A, 90), characterised in that this emblem (20, 20A, 20B, 20C, 41, 71) is arranged on the surface (5) facing the light source (10) or on the surface (4) facing away from the light source (10), wherein the base area, with respect to the surface (5) facing the light source (10) or the surface (4) facing away from the light source (10), is offset by between 0,2 mm and 6 mm.
5. Vehicle headlight (1) as claimed in claim 3 or claim 4, characterised in that the emblem (20, 20A, 20B, 20C, 31, 31A, 41, 51, 61, 71, 81) extends into the lens body (3).
6. Vehicle headlight (1) as claimed in claim 3 or claim 4, characterised in that the emblem (20, 20A, 20B, 20C, 31, 31A, 41, 51, 61, 71, 81) projects, in relief manner, beyond a portion of the surface (5) facing the light source (10) or beyond a portion of the surface (4) facing away from the light source (10)
7. Vehicle headlight (1) as claimed in claim 3 or claim 4, characterised in that the emblem (20, 20A, 20B, 20C, 31, 31A, 41, 51, 61, 71, 81) is arranged in a depression (21A, 21B, 32, 89) in the lens body (3).
8. Vehicle headlight (1) as claimed in claim 7, characterised in that the emblem (20, 20A, 20B, 20C, 31, 31A, 41, 51, 61, 71, 81) projects, in relief manner, beyond a bottom face of the depression (21A, 21B, 32, 89).
9. Vehicle headlight (1) as claimed in anyone of claims 3 to 8, characterised in that a projection of the base area (35, 35A, 90) onto the surface (5) facing the light source (10) covers less than 30 % of the surface facing the light source (10) or that a projection of the base area (35, 35A, 90) onto the surface (4) facing away from the light source (10) covers less than 30 % of the surface (4) facing away from the light source (10).
10. Vehicle headlight (1) as claimed in anyone of claims 3 to 9, characterised in that the surface (5) facing the light source (10) includes an area provided with a roughness of at least 0,05 µm.
11. Vehicle headlight (1) as claimed in anyone of claims 3 to 10, characterised in that the surface (4) facing away from the light source (10) includes an area provided with a roughness of at least 0,05 µm.
12. Vehicle headlight (1) as claimed in claim 10 or claim 11, characterised in that the area provided with a roughness of at least 0,05 µm is arranged to surround the emblem (20, 20A, 20B, 20C, 31, 31A, 41, 51, 61, 71, 81).
13. Vehicle headlight (1) as claimed in anyone of claims 3 to 12, characterised in that the emblem (20, 20A, 20B, 20C, 31, 31A, 41, 51, 61, 71, 81) is arranged on the surface facing away from the light source (10) and that the surface (5) facing the light source (10) is provided with a roughness of at least 0,05 µm on at least an essential portion thereof.
14. Vehicle headlight (1) as claimed in anyone of claims 3 to 13, characterised in that the surface (5) facing the light source (10) is essentially planar.
15. Vehicle headlight (1) as claimed in anyone of claims 3 to 14, characterised in that the surface (4) facing away from the light source (10) is essentially convex.
16. Headlight lens (30, 30A, 50, 60, 80) for a vehicle headlight (1), in particular for a motor vehicle headlight, wherein the headlight lens (30, 30A, 50, 60, 0) comprises a lens body (3) of transparent material, which lens body includes one essentially planar surface and one essentially convex surface, and has an emblem (31, 31A, 51, 61, 81) provided with a base area (35, 35A, 90) on the essentially planar surface, characterised in that this base area (35, 35A, 90), with respect to the essentially planar surface or with respect to an optical axis (38, 38A, 88) of the headlight lens (30, 30A, 50, 60, 80), is inclined such

    - that light entering the lens body (3) through the essentially convex surface along the optical axis (38, 38A, 88) of the headlight lens (30, 30A, 50, 60, 80) is subjected to total reflection at the base area (35, 35A, 90)
    or that,

    - with respect to the essentially planar surface, it is inclined by an angle (α) of between 25° and 80°, in particular of between 35° and 60°, or, °, with respect to an optical axis (38, 38A, 88) of the headlight lens (30, 30A, 50, 60, 80), by an angle (β) of between 10° and 65°, in particular of between 30° and 55.
17. Headlight lens (30, 30A, 50, 60, 80) as claimed in claim 16, characterised in that the base area (35, 35A, 90), with respect to the essentially the planar surface, is offset by between 0,2mm and 6mm.
18. Headlight lens (30, 30A, 50, 60, 80) as claimed in claim 16 or claim 17, characterised in that the emblem (31, 31A, 51, 61, 81) extends into the lens body (3).
19. Headlight lens (30, 30A, 50, 60, 80) as claimed in claim 16 or claim 17, characterised in that the emblem (31, 31A, 51, 61, 81) projects beyond a portion of the essentially planar surface in relief manner.
20. Headlight lens (30, 30A, 50, 60, 80) as claimed in claim 16 or claim 17, characterised in that the emblem (31, 31A, 51, 61, 81) is arranged in a depression (21A, 21B, 32, 89) in the lens body (3).
21. Headlight lens (30, 30A, 50, 60, 80) as claimed in claim 20, characterised in that the emblem (31, 31A, 51, 61, 81) projects beyond a bottom surface of the depression (21A, 21B, 32, 89) in relief manner.
22. Headlight lens (30, 30A, 50, 60, 80) as claimed in anyone of claims 16 to 21, characterised in that a projection of the base area (35, 35A, 90) onto the essentially planar surface covers less than 30 % of the essentially planar surface or that a projection of the base area (35, 35A, 90) onto the essentially convex surface covers less than 30 % of the essentially convex surface.
23. Headlight lens (30, 30A, 50, 60, 80) as claimed in anyone of claims 16 to 22, characterised in that the essentially planar surface is provided with an area provided with a roughness of at least 0,05 µm.
24. Headlight lens (30, 30A, 50, 60, 80) as claimed in anyone of claims 15 to 23, characterised in that the essentially convex surface is provided with an area provided with a roughness of at least 0,05 µm.
25. Headlight lens (30, 30A, 50, 60, 80) as claimed in claim 23 or claim24, characterised in that the area provided with a roughness of at least 0,05 µm is arranged to surround the emblem (31, 31A, 51, 61, 81).
26. Headlight lens (30, 30A, 50, 60, 80) as claimed in anyone of claims 17 to 22, characterised in that the emblem (31, 31A, 51, 61, 81) is arranged on the essentially convex surface and that at least an essential portion of the essentially planar surface is provided with a roughness of at least 0,05 µm.
27. Vehicle headlight (1), characterised in that it has a headlight lens (30, 30A, 50, 60, 80) as claimed in anyone of claims 16 to 26.
28. Motor vehicle (100), characterised in that it is provided with a headlight lens (2, 2A, 2B, 2C, 30, 30A, 40, 50, 60, 70, 80) as claimed in anyone of claims 1, 2 or 16 to 26 or with a vehicle headlight (1) as claimed in anyone of claims 3 to 15 or 27.

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