LIGHTING SYSTEM AND HEADLIGHTS

Abstract

Lighting system with at least two light guides (8; 52-58), wherein the at least two light guides (8; 52-58) each have an input area (14) and an output area (12), and at least two radiation sources (16-22, 28, 30; 50), wherein a first radiation source of the at least two radiation sources (16-22, 28, 30; 50) comprises a first radiation surface (26) pointing towards an input area (14) of a first light guide of the at least two light guides (8; 52-58), and wherein a second radiation source of the at least two radiation sources (16-22, 28, 30; 50) comprises a second radiation surface (26) pointing towards an input area (14) of a second light guide of the at least two light guides (8; 52-58), characterized in that a first distance is provided between the input area (14) of the first optical fiber of the at least two optical fibers (8;52 - 58) and the radiation surface (26) of the first radiation source of the at least two radiation sources (16 - 22, 28, 30; 50) and a second distance between the coupling surface (14) of the second optical fiber of the at least two optical fibers (8; 52 - 58) and the radiation surface (26) of the second radiation source of the at least two radiation sources (16 - 22, 28, 30; 50) differ.;

Description

[0001] The invention relates to a lighting system according to the preamble of claim 1. Furthermore, the invention relates to a headlight with a lighting system.

[0002] Vehicles equipped with an Adaptive Driving Beam (ADB) as an optional extra are known from the prior art. This can be achieved, for example, by using matrix-like arrangements of light-emitting diodes (LEDs), with the LEDs forming part of a module. Each individual LED or group of LEDs within the module can then be controlled separately, allowing them to be switched on and off as well as dimmed. In combination with a camera system and image processing electronics, oncoming traffic and vehicles ahead are detected and at least partially masked out. This makes it possible, for example, to drive with "high beams" permanently without dazzling other road users, especially under certain conditions. These conditions might include the vehicle being outside of built-up areas and / or traveling at a speed exceeding 50 km / h.In addition to other road users, highly reflective surfaces, such as signs, can also be locally blocked out or illuminated with reduced light output.

[0003] From DE 20 2015 008 369 U1 a lighting device is known in which two semiconductor light sources couple light for different lighting functions (e.g. daytime running light and flashing light) into the same light guide.

[0004] DE 10 2013 200 442 B3 discloses a light module with a light guide arrangement having several light guide branches.

[0005] US 2017 / 0089536 A1 shows a lighting system with a primary optic having light guides on at least two levels, for example a lower set of light guides for a segmented high beam and an upper light guide for a low beam.

[0006] In principle, it is essential for vehicle headlights to have the highest possible efficiency. Furthermore, it is extremely advantageous for vehicle manufacturers if light sources and / or modules, such as the ADB system, are designed as small, lightweight, bright, cost-effective, and technically simple modules as possible. This gives the vehicle manufacturer greater flexibility in vehicle design and allows them to save costs, weight, etc.

[0007] The object of the present invention is to create a lighting system and a headlight that are technically simple and cost-effective and have high efficiency.

[0008] The problem with regard to the lighting system is solved according to the features of claim 1 and with regard to the headlight according to the features of claim 10.

[0009] Particularly advantageous features can be found in the dependent claims.

[0010] According to the invention, a lighting system, particularly for a vehicle, is provided with at least two light guides. These preferably each have an input surface and an output surface. Furthermore, at least one radiation source can be provided for each light guide. For example, it is also conceivable that one radiation source is used for several light guides. The radiation source, or each individual radiation source, preferably has a radiation surface that can point towards the input surface of the corresponding light guide. Advantageously, the distance between the input surface of one of the light guides and the radiation surface of a radiation source associated with it, and the distance between the input surface of another light guide, or the other light guide if exactly two light guides are present, and the radiation surface of a radiation source associated with it, are different.

[0011] This solution has the advantage that radiation emitted by the light sources can be coupled into the corresponding light guide with varying efficiency depending on the distance. The smaller the distance, the greater the efficiency of coupling the radiation. Thus, the light intensity and distribution of the radiation coupled out of the light guides can be adjusted by varying the distances. These different distances create additional parameters for influencing the light distribution. This is particularly advantageous in vehicles, especially when the lighting system is used for high beams, allowing the light distribution to be easily adjusted as needed by varying the distances.Thus, light distribution can be easily adapted based on the intended wishes and requirements, since adjusting the distances makes it possible to adjust the efficiency of coupling the radiation into the light guides.

[0012] In a further embodiment of the invention, the coupling surfaces or the coupling surfaces of the optical fibers can point in the same direction and / or have the same orientation. This allows radiation to be coupled into the optical fibers from one side, resulting in a simpler design. If necessary, it is of course also conceivable to arrange the at least two coupling surfaces, or a portion of the coupling surfaces if a plurality of coupling surfaces are provided, or all coupling surfaces, in different directions or orientations. This can then also apply accordingly to the coupling surfaces.

[0013] Preferably, the radiation surfaces of the radiation sources point in the same direction or have the same orientation, resulting in a simple arrangement from a device engineering perspective. Alternatively, if required, it is conceivable that the at least two radiation surfaces, or a portion of the radiation surfaces if a plurality of radiation surfaces are provided, or all radiation surfaces point in different directions or have different orientations.

[0014] Preferably, the surface normals of the coupling surfaces and / or the principal optical axes of the coupling surfaces are arranged parallel to each other, in particular approximately. It is conceivable that the surface normals of the radiation surfaces and / or the principal emission axes of the radiation surfaces are arranged parallel to each other, in particular approximately. Furthermore, it can be provided that the surface normals and / or the principal emission axes of the radiation surfaces and the surface normals and / or principal optical axes of the coupling surfaces are arranged parallel to each other, in particular approximately, which in each case or in combination leads to a simple device design.

[0015] Preferably, a reference plane is provided, wherein the at least two coupling surfaces have different distances from the reference plane. The reference plane extends, for example, particularly approximately, transversely to the surface normal and / or to the principal optical axes of the coupling surfaces. In a further embodiment of the invention, it is conceivable that the radiation surfaces have, in particular approximately, the same distance from the reference plane. Thus, the distance can be adjusted via the arrangement of the coupling surfaces, since the radiation surfaces, due to the equal distance from the reference plane, can, for example, lie in a common plane. In other words, it is conceivable that a coupling surface, or individual coupling surfaces, or groups of coupling surfaces have different distances from the reference plane. The coupling surfaces are, in particular, provided on the same side of the reference plane.

[0016] In a further embodiment of the invention, it can be provided that the at least two radiation surfaces have different distances from the reference plane. For example, it can be provided that the coupling surfaces have, in particular, approximately the same distance from the reference plane. Thus, the different distances between the coupling surfaces and the corresponding radiation surfaces can be achieved by different arrangements of the radiation surfaces. In other words, a radiation surface, or individual radiation surfaces, or groups of radiation surfaces can have different distances from the reference plane. The radiation surfaces are, in particular, located on the same side of the reference plane.

[0017] It is also conceivable that at least two coupling surfaces have a different distance to the reference plane and, in addition, at least two radiation surfaces have a different distance to the reference plane.

[0018] Preferably, each radiation source is selected from the following group of radiation sources: light-emitting diode (LED), laser light source, laser-activated remote phosphor (LARP) source, organic light-emitting diodes (OLED). The lighting system can then use the same radiation sources or a combination of at least two different radiation sources.

[0019] The LED can be in the form of at least one individually packaged LED or at least one LED chip containing one or more light-emitting diodes. Multiple LED chips can be mounted on a common substrate ("submount") to form a single LED, or they can be individually or collectively mounted on a circuit board (e.g., FR4, metal-core board, etc.) ("CoB" = Chip on Board). The LED can be equipped with at least one dedicated and / or shared optical system for beam guidance, such as at least one Fresnel lens or a collimator. Organic LEDs (OLEDs, e.g., polymer OLEDs) can also be used instead of or in addition to inorganic LEDs, such as those based on AlInGaN, InGaN, or AlIn-GaP. The LED chips can be direct emitters or have a phosphor layer. Alternatively, the light-emitting component can be a laser diode or a laser diode array.It is also conceivable to incorporate one or more OLED light-emitting layers or an OLED light-emitting area. The emission wavelengths of the light-emitting components can be in the ultraviolet, visible, or infrared spectral range. The light-emitting components can also be equipped with their own converter. Preferably, the LED chips emit white light in the standardized ECE white field of the automotive industry, for example, achieved by a blue emitter and a yellow / green converter.

[0020] In a further embodiment of the invention, the radiation sources can be arranged on a holding element, such as a circuit board or a printed circuit board or a substrate, making the radiation sources easy to handle and easy to position relative to each other.

[0021] The holding element can have a, in particular, a flat holding surface. To adjust the distance, the corresponding radiation source can be easily arranged on the holding surface via a step. The height of the corresponding step can then be adjusted to achieve the desired distance. It is conceivable to provide multiple steps of varying heights. In other words, the radiation sources can be placed individually and / or in groups at different heights on the circuit board due to the different step heights. The step(s) can have a cross-section, in particular, perpendicular to the surface normal and / or the main radiation axis of the associated radiation surfaces, which is selected from the following cross-sectional shapes: angular, rectangular, n-sided, round, elliptical, free-form, wherein the step surfaces have polygonal or elliptical cross-sectional shapes with respect to their orientation or...The rotation can be arranged differently. This allows for flexible implementation of specifications regarding installation space requirements or design. Furthermore, it is conceivable that a step surface or steps, on which at least one radiation source is provided, have a circumferential shape selected from the following: angular, rectangular, n-sided, round, elliptical, or free-form. Preferably, the steps and / or step surfaces have a similar orientation, particularly approximately, which allows the radiation sources to be easily arranged on them with the same orientation. Alternatively, it is conceivable that a step or step surface, or a part of the step or step surfaces, or all steps or step surfaces have a different orientation.Instead of the circuit board with the steps, or in addition to the circuit board with the steps, it is conceivable to provide several different circuit boards that are arranged next to each other and / or designed in such a way that the desired distances are provided.

[0022] To allow for a flexible arrangement of the radiation sources, it is conceivable that the stages, or some of the stages, or groups of stages, are spaced apart from one another. It is also possible for the stages, or some of the stages, or groups of stages to be adjacent to or connected to one another. For example, it is conceivable that individual stages, some of the stages, or all of the stages or groups of stages are simply configured as islands. Furthermore, it is conceivable that individual stages, some of the stages, or all of the stages or groups of stages are simply configured as peninsulas. In other words, the shape of the stages, as well as their orientation and placement, is variable, which is extremely advantageous for adapting to a given design.

[0023] In a further embodiment of the invention, one or more radiation sources are arranged on each stage.

[0024] In a further embodiment of the invention, the distances from the inside of the lighting system to the outside can increase, particularly continuously or in steps. Furthermore, it can be provided that the distances from the inside to the outside of the lighting system, particularly continuously or in steps, first increase and then decrease again. The "inside" can be located in the region of the principal optical axis of the lighting system. This is extremely advantageous when using the lighting system in a high beam, in order to provide higher light intensities in the central area of ​​a photograph.

[0025] In a further embodiment of the invention, at least one inner light guide or several inner light guides and at least one outer light guide or several outer light guides are provided, wherein the distance between the coupling surfaces of the inner light guide or the inner light guides and the associated radiating surface is smaller compared to the distance between the coupling surface of the outer light guide or the outer light guides and the associated radiating surface. Thus, for example, higher light intensities or luminous fluxes can be provided in an inner, central, or central region of the lighting system compared to the outer region.

[0026] Advantageously, at least one inner step, or several inner steps, and at least one outer step, or several outer steps, can be provided, with the height of the inner step(s) being greater than the height of the outer step(s). This allows for higher light intensity or luminous flux in an inner, central, or middle area of ​​the lighting system. The height of a step is preferably lower the further out it is located. It is also possible for the step heights to decrease, particularly continuously, from the inside out. Alternatively, the step heights may decrease from the inside out and then increase again.

[0027] In a further embodiment of the invention, the optical fibers and / or the radiation sources and / or the stages can be arranged in a matrix or row configuration. For example, it is conceivable to arrange them in one or more rows. Thus, a single-row or multi-row configuration is possible. Furthermore, it is conceivable that, for example, more rows are provided on the inside than on the outside. The row-like or matrix configuration is extremely advantageous for use in an ADB system.

[0028] Advantageously, the optical fibers and / or the radiation sources and / or the stages are arranged symmetrically. This symmetrical arrangement is achieved particularly with respect to a principal optical axis and / or with respect to a plane in which the principal optical axis lies and which then extends perpendicular to the line or lines.

[0029] Preferably, a larger distance and / or a shorter light guide and / or no step and / or a step with a small height is provided at the point(s) where larger manufacturing tolerances exist. In particular, the inner light guide(s) can be longer than the outer light guide(s). Furthermore, the distance between the inner light guide(s) and the corresponding radiation source can be smaller than the distance between the outer light guide(s) and the corresponding radiation source. This solution has the advantage that tolerances or manufacturing tolerances, for example, in the outer area of ​​the retaining element or the circuit board, can be larger than in the inner area, since there is more clearance in the outer area due to the shorter light guide(s).In other words, due to tolerance requirements, small distances are not guaranteed across the entire optics and / or circuit board, but are only maintained where they are most critical, for example, where the highest light intensity and / or more precise compensation for temperature-related length changes is needed, such as in the middle or center. If, for example, high manufacturing tolerances cannot be maintained at the edge or outer edge, shorter light guides are simply used there so that the light guides and the radiation sources do not touch, even when utilizing the full manufacturing tolerance.

[0030] The optical fibers can, for example, have a cladding surface over which the radiation coupled into the fiber is guided, particularly by total internal reflection. Thus, a separate cladding is not required. The cross-sectional area of ​​the optical fibers can be, for example, rectangular or circular. Furthermore, it is conceivable that the cladding surface could be shaped as a truncated cone or pyramid, or with a freely defined shape.

[0031] To adjust the distances using the light guides, these can have different shapes and / or lengths.

[0032] In a further embodiment of the invention, the optical fibers can be components of an optical system that connects them to each other via a common connecting section on the output side. The optical system can then have an exit surface pointing away from the optical fibers for the light or radiation emerging from them. The optical fibers can, for example, be integrally connected to a connecting section. Furthermore, it is conceivable that the optical fibers point away from the connecting section.

[0033] According to the invention, a headlight is provided with a lighting system according to one or more of the preceding aspects. Preferably, the headlight is used for a vehicle. The optics can then be a primary optic, to which a secondary optic is connected. The lighting system can then, for example, include an ADB function.

[0034] The vehicle can be an aircraft, a watercraft, or a land-based vehicle. A land-based vehicle can be a motor vehicle, a rail vehicle, or a bicycle. A truck, a passenger car, or a motorcycle is particularly preferred. The vehicle can also be designed as a non-autonomous, semi-autonomous, or autonomous vehicle.

[0035] The term "approximately" can, for example, mean that there may be a deviation within the usual tolerances or of up to 5%.

[0036] The invention will now be explained in more detail using exemplary embodiments. The figures show: Fig. 1 in a perspective view a lighting system with two optics according to an exemplary embodiment, Fig. 2 in a perspective view, an optics system with a multitude of light guides, Fig. 3 in a side view a section of the lighting system from Fig. 1, Fig. 4 in a diagram, a coupling efficiency as a function of the distance between a radiation surface of a radiation source and a coupling surface of an optical fiber, Fig. 5 in a perspective view a section of the lighting system from Fig. 1, Fig. 6a to 6d different representations of light distributions of the lighting system and Fig. 7 in a side view a section of the lighting system according to a further embodiment.

[0037] According to Fig. Figure 1 is a headlight for a vehicle 1, simplified and represented by a dashed line. It has a lighting system 2 comprising a primary optic 4 and a secondary optic 6. The primary optic 4 has a plurality of light guides, each associated with a light source in the form of a light-emitting diode (LED), the LEDs shown below. Fig. 3 is marked with a reference symbol.

[0038] According to Fig. 2 shows the primary optic 4 enlarged, in comparison to the Fig. 1 has a slightly modified form. The primary optics 4 has a plurality of light guides 8, of which, for the sake of simplicity, only one is provided with a reference symbol. The light guides 8 are formed integrally with a connecting section 10. This has an output coupling surface 12 that points away from the light guides 8. Each light guide 8 has a connection to a respective radiation source, see also Fig. 3, associated coupling area 14, each pointing away from the coupling area 12.

[0039] According to Fig. Figure 3 shows some of the light guides 8 in a side view from the coupling side. Each light guide 8 is associated with a radiation source 16 to 22, each of which is an LED. The flat coupling surfaces 14 are arranged in a plane. This plane extends transversely to the main optical axis 24 of the illumination system 2, see Figure 3. Fig. 1. The radiation sources 16 to 22 each have a radiation surface 26, where, for the sake of simplicity, in Fig. 3 only for the radiation source 16 the radiation surface is provided with a reference numeral. The radiation surfaces 26 according to the embodiment in Fig. 3 are designed as planar surfaces. The radiation surfaces 26 of the radiation sources 16 to 22 each have a different distance to the respective associated coupling surface 14 of the optical fibers 8. The in Fig. 3 right light guides 8 is an inner light guide, which according to Fig. 2 is provided in the center of the optics. The one in Fig. The leftmost optical fiber 8 is the outermost optical fiber. It can be seen that the radiating surface 26 of the radiation source 22 has the smallest distance to the corresponding coupling surface 14 of the optical fiber 8. The adjacent radiation source 20 has a greater distance to its associated coupling surface 14. The radiation source 18, which is adjacent to this in turn, has a smaller distance to its associated coupling surface 14. The outermost radiation source 26 has the greatest distance to its associated coupling surface 14.

[0040] According to the Fig. 3. The radiation sources 16 to 22 have the same radiating surface 26 or emission surface. Furthermore, the shape and size of the coupling surfaces 14 of the optical fibers 8 are the same. It is conceivable that some or all of the radiating surfaces 26 differ in their shape and / or size. It is also conceivable that some or all of the coupling surfaces 14 differ in their shape and / or size.

[0041] According to Fig. Figure 4 shows the relationship between the coupling efficiency in % (ordinate) and the distance in mm (abscissa) between a radiation source and the associated optical fiber. The highest efficiency occurs when the distance approaches 0. As the distance increases, the coupling efficiency decreases, resulting in less light being coupled into the corresponding optical fiber 8. An absolute maximum efficiency is determined by the materials used (refractive index, Fresnel reflections) and the geometries of the coupling surfaces, radiation surfaces, and optical fiber. Fig. Figure 4 shows that at a distance of approximately 0.4 mm, only about 50% of the radiation is coupled in. From approximately 0.7 mm, only about 1 / 3 of the radiation is coupled in. Thus, the efficiency of the light coupling can be influenced by adjusting the distances, thereby enabling a simple method of adjusting the light distribution from the headlight 1, see Figure 4. Fig. 1, outgoing light can be influenced and determined.

[0042] According to Fig. 5 is part of the radiation sources for the optical fibers 8. Fig. Figure 2 shows the radiation sources 16 to 22. Fig. 3 shown, as well as two further radiation sources 28 and 30, which are in Fig. 3 are not visible because, viewed in the direction of the plane of the drawing, they lie behind the radiation sources 20 and 22. The radiation sources 16 to 22, 28 and 30 are arranged on a flat mounting surface 32 of a circuit board 34. According to Fig. 5 is only half of the radiation sources for optics 4. Fig. 2 shown. The in Fig. The 5 radiation sources not shown are arranged symmetrically to the radiation sources 16 to 22, 28 and 30, the symmetry being provided with respect to a plane of symmetry which extends transversely to the holding surface 32 and in which the principal optical axis 24 is Fig. 1 lies, where the plane of symmetry is then according to Fig. 5 to the left of the radiation sources 22 and 30. To reduce the distance between the radiation sources 18 to 22 and 28, 30 and the light guides 8, they are fixed to the mounting surface 32 via steps 36, 38 and 40. The radiation sources 22 and 30 are arranged on the innermost step. Step 38, on which the radiation sources 20 and 28 are arranged, is provided adjacent to these in an outward direction. Step 36, on which the radiation source 18 is arranged, is again adjacent to step 38. Thus, two rows of radiation sources 20, 22 and 28 and 30 are provided in the interior. Only one row of radiation sources 16, 18 is provided outward. The distance to the light guides 8 is then determined by the height of steps 36 to 40, see also Fig. 3, adjustable.

[0043] According to Fig. Figure 6a shows a light distribution of light emitted from lighting system 1. Fig. 1 exit. According to Fig. 6a provides that the radiation sources are equidistant from their respective assigned light guides. The light distribution is symmetrical. In contrast, in Fig. Figure 6c shows a light distribution in which some of the radiation sources are at different distances from the associated light guides. The radiation sources at different distances correspond to those shown in Figure 6c. Fig. 5, which have reference numerals 16 to 22, 28 and 30. The other radiation sources are thus equidistant, without steps or different spacing, to allow for a better comparison of the solution according to the invention. In other words, in Fig. Figure 6c shows a composite light distribution. The left half is equipped "normally", that is, without steps or different spacing, while the right half is designed according to the invention. Consequently, according to Fig. 6c (in the right part) a higher maximum light intensity compared to Fig. 6a or in comparison to the left part. According to Fig. At 6c the maximum light intensity is 100 kcd, while in Fig. 6a 90 kcd. The area marked with arrow 42 has a higher light intensity, since according to Fig. 5. The radiation sources 22 and 30 are arranged closer to their respective light guides 8. The areas marked with arrows 44 are less luminous because the radiation sources 16, 20 and 28 are located there. Fig. 5, further spaced from their associated light guides 8. According to the Fig. 6b and Fig. 6d are differences in the light distributions from the Fig. 6a and Fig. 6c is shown. Thus, in Fig. 6b shows a difference where the light distribution is from Fig. 6c from the light distribution Fig. 6a has been subtracted. It is evident that in the lateral area 46 in the photograph of the Fig. 6a a higher light intensity is present. In the representation in Fig. 6d is the light distribution from Fig. 6a from the light distribution Fig. 6c subtracted, whereby it can be seen from area 48 that in the inner areas or in the areas with radiation sources 18, 22 and 30, see Fig. 5, a higher light intensity is present.

[0044] Fig. Figure 7 shows an embodiment in which radiation sources 50 lie in a common plane, while optical fibers 52, 54, 56 and 58 are spaced differently from the associated radiation source 50. The inner optical fiber 54 (in Fig. 7 (the right one) has the smallest distance to the radiation source 50. The distances then increase towards the outside, so that the outer optical fiber 58 has the greatest distance to its associated radiation source 50. Thus, the distance between the optical fibers and the radiation sources can be determined according to Fig. 3 regarding the different arrangement of the radiation sources or according to Fig. 7. The different arrangement or design of the light guides may be provided. A combination of these is also conceivable. The distances in Fig. 7 are preferably set over a length of the optical fibers 52 to 58.

[0045] A lighting system with multiple light guides, each with a coupling surface, is revealed. Each coupling surface is associated with a radiation source. The distance between the light guides and their respective radiation sources varies. REFERENCE MARK LIST 1 headlight 2 Lighting system 4 Primary optics 6 Secondary optics 8; 52 to 58 fiber optic cables 10 Connecting section 12 Disconnection area 14 coupling area 16 to 22, 28, 30; 50 radiation source 24 Main axis 26 radiation area 32 holding surface 34 circuit boards Levels 36, 38, 40 42, 44 Arrow 46, 48 area

Claims

[1] Lighting system with at least two optical fibers (8; 52-58), wherein the at least two optical fibers (8; 52-58) each have an input area (14) and an output area (12), and at least two radiation sources (16-22, 28, 30; 50), wherein a first radiation source of the at least two radiation sources (16-22, 28, 30; 50) comprises a first radiation surface (26) pointing towards an input area (14) of a first optical fiber of the at least two optical fibers (8; 52-58), and wherein a second radiation source of the at least two radiation sources (16-22, 28, 30; 50) comprises a second radiation surface (26) pointing towards an input area (14) of a second optical fiber of the at least two optical fibers (8; 52-58), characterized by, that a first distance between the coupling surface (14) of the first optical fiber of the at least two optical fibers (8; 52 - 58) and the radiation surface (26) of the first radiation source of the at least two radiation sources (16 - 22, 28, 30; 50) and a second distance between the coupling surface (14) of the second optical fiber of the at least two optical fibers (8; 52 - 58) and the radiation surface (26) of the second radiation source of the at least two radiation sources (16 - 22, 28, 30; 50) differ. [2] Lighting system according to claim 1, wherein the coupling surfaces (14) of the at least two light guides (8; 52 - 58) point in the same direction, and / or wherein the first radiating surface (26) and the second radiating surface (26) point in the same direction. [3] Lighting system according to claim 1 or 2, wherein the principal optical axes of the coupling surfaces (14) of the at least two light guides (8; 52 - 58) are arranged parallel to each other, and / or wherein the principal emission axes of the first emission surface (26) and the second emission surface (26) are arranged parallel to each other. [4] Lighting system according to one of claims 1 to 3, wherein a reference plane is provided, wherein the coupling surfaces (14) of the at least two light guides (8; 52 - 58) have a different distance to the reference plane, and / or wherein the at least two radiation surfaces (26) have a different distance to the reference plane. [5] Lighting system according to one of the preceding claims, wherein the at least two radiation sources (16 - 22, 28, 30; 50) are arranged on a holding element (34), wherein, for adjusting the distance, each radiation source of the at least two radiation sources (16 - 22, 28, 30; 50) is arranged on the holding element (34) via at least one step (36, 38, 40). [6] Lighting system according to claim 5, wherein the height of the respective step (36, 38, 40) is adjusted to adjust the distance. [7] Lighting system according to claim 5 or 6, wherein the steps (36, 38, 40) or part of the steps (36, 38, 40) or groups of steps (36, 38, 40) are spaced apart from each other, and / or wherein two or more of the steps (36, 38, 40) are connected to each other. [8] Lighting system according to one of the preceding claims, wherein the at least two light guides (8) form part of an optic (4) which connects the at least two light guides (8) to each other on the output side via a common connecting section (10) which has an exit surface (12) pointing away from the at least two light guides (8) for the light exiting from the light guides (8). [9] Lighting system according to claim 8, wherein the first distance between the coupling surface (14) of the first light guide of the at least two light guides (8; 52 - 58) and the radiation surface (26) of the first radiation source of the at least two radiation sources (16) - 22, 28, 30; 50) and the second distance between the coupling surface (14) of the second optical fiber of the at least two optical fibers (8; 52 - 58) and the radiation surface (26) of the second radiation source of the at least two radiation sources (16 - 22, 28, 30; 50) from the inside to the outside of the optics (4) become larger. [10] Headlights with a lighting system according to one of the preceding claims.

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