Vehicle headlamp
By using asymmetrical protrusions to construct deflection sections in vehicle headlights, the problem of uneven light image transitions is solved, achieving uniformity and reduced gaps in the light image, thus improving the adjustment accuracy of light distribution and legal compliance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZKW GRP GMBH
- Filing Date
- 2021-11-04
- Publication Date
- 2026-05-22
AI Technical Summary
When existing vehicle headlights overlay images of low beam and high beam, the transition is not smooth, with gaps or color distortion, making it difficult to achieve a seamless transition.
A projection lens with a deflection section transverse to the optical axis is used. The deflection section is constructed with an asymmetrical protrusion. The tilted side of the protrusion is used to deflect the light, thereby achieving a uniform transition of the light image.
It achieves a uniform transition between light images, reduces the gap between highlights and shadows, reduces the appearance of blue edges, and improves the accuracy of light distribution adjustment and the possibility of meeting legal requirements.
Smart Images
Figure CN116670427B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a vehicle headlight, comprising:
[0002] - A low beam module for generating low beam distribution, wherein the low beam module includes at least one light source; and
[0003] - A high beam module for generating high beam distribution, wherein the high beam module includes at least one light source;
[0004] - Projection lens; and
[0005] - Radiation shielding components;
[0006] The two optical modules are coupled with a common projection lens and a common ray blocker, respectively, in such a way that the light sources are arranged such that the common ray blocker is in the optical path from the respective light source toward the common projection lens, so as to limit the light distribution emitted into the common projection lens. The common projection lens is arranged in the optical path of the two optical modules such that the light rays emitted by the optical modules and passing through the common ray blocker can be imaged onto the roadway in the form of a superimposed light distribution through the common projection lens, wherein the common projection lens has an optical axis. Background Technology
[0007] Such vehicle headlights are already known from existing technology. A particular challenge in superimposing the light images of two light modules is achieving the most seamless transition possible between the light images. To this end, the light modules are carefully aligned relative to a common ray-blocking element.
[0008] A disadvantage of known headlights is that the transition can only be made smooth enough through costly measures, and / or gaps or color distortion in the transition area must be tolerated. Summary of the Invention
[0009] Therefore, the object of the present invention is to overcome the shortcomings of the prior art. This object is achieved by a vehicle headlight of the type mentioned at the beginning, in which, according to the present invention, a common projection lens has a first deflection section at its emission side extending upward and downward transversely to the optical axis along the periphery of the projection lens, the first deflection section being arranged on the surface of the projection lens, wherein, in the first deflection section, the emission side of the common projection lens is constructed by protrusions arranged side by side, the protrusions being respectively defined by the connection of a first side facing the optical axis and a second side facing away from the optical axis, wherein the protrusions generally include at least a first type of protrusions, in which these sides are constructed substantially asymmetrically relative to each other.
[0010] In this way, light rays can be targeted by refraction at the sloping sides of the protrusion, thereby achieving uniformity in the transition between the light images of the two optical modules in a simple manner. The statement that the sides are constructed asymmetrically relative to each other means that the sides are constructed asymmetrically with respect to an axis that intersects the amplitude of the protrusion and is tangentially oriented to the basic shape of the exit surface in the region of the protrusion. This basic shape is given by the smooth geometric orientation of the exit surface (i.e., the shape produced without omitting the flat form of the protrusion). The statement "a first deflection segment extending upward and downward along the periphery of the projection lens transverse to the optical axis" means that the deflection segment has a vertical extension that is clearly upward and downward relative to a point within the segment. Here, this segment follows the surface curvature of the lens's exit side.
[0011] In particular, the asymmetry of the first type of protrusion can be configured such that the second side of the corresponding protrusion is constructed to be flatter than its first side. The side is not necessarily required to have a constant slope. This asymmetry can also be applied to all protrusions.
[0012] Furthermore, it can be configured such that the total number of protrusions includes at least protrusions of the second type, in which the descending and ascending sides are constructed substantially symmetrically with respect to each other. The expression "substantially" here means that a deviation of up to 10% is permitted. It can also be configured such that the total number of protrusions consists only of protrusions of the first and second types.
[0013] In particular, the optical axis of the common projection lens can be configured such that it is oriented substantially horizontally, and the high beam module is offset downward relative to the ray blocker, while the low beam module is offset upward relative to the ray blocker. Unless otherwise stated, positional descriptions such as "upward," "downward," and "horizontal" always refer to the mounting position of the headlights in which the headlights are mounted in the vehicle and the vehicle is in a horizontal position.
[0014] Furthermore, the low-beam module and the high-beam module can each have a main radiation direction, wherein these two modules are tilted relative to the optical axis of a common projection lens such that the main radiation directions of the two modules form the same angle relative to the optical axis of the common projection lens. The expression "same angle" here means that the numerical value of the angle is the same. Therefore, one optical module rotates upward by an angle, while the other optical module rotates downward by the same angle. Consequently, the light rays at the light edges are parallel to each other.
[0015] In particular, it can be configured such that adjacent protrusions are adjacent to each other in the vertical direction along the periphery of the exit side of a common projection lens.
[0016] Furthermore, the first deflection segment can be arranged in the central region of a common projection lens. This "central region" is understood to be an area that extends upward and downward from the intersection of the optical axis of the projection lens and the exit surface with a length of 25% of the perimeter of the exit surface.
[0017] In particular, the first section can be configured to include two sub-sections, wherein the first sub-section is arranged above the optical axis of a common projection lens, and the second sub-section is arranged below the optical axis of a common projection lens, wherein the asymmetry of the protrusions present in the second sub-section is constructed to be stronger than the asymmetry of the protrusions arranged in the first sub-section.
[0018] Furthermore, each sub-segment can be configured to have a first type of protrusion, and these protrusions can be divided into a first sub-type and a second sub-type, wherein the two sub-types of protrusions differ from each other at least in terms of the geometry of their second side surfaces, such that the second side surface of the second sub-type is, on average, more flat than the second side surface of the first sub-type. Alternatively, only the first type of protrusions can be provided in the first segment. The flatter second side surface results in the associated protrusion having a lower height for the same width and the same first side surface.
[0019] In particular, it can be configured such that protrusions of different subtypes are arranged alternately side by side, such that each protrusion sandwiched by an adjacent protrusion is of a different subtype than its adjacent protrusion.
[0020] Furthermore, it can be configured such that a second deflection segment and a third deflection segment are provided on a common projection lens, and the second and third deflection segments are respectively arranged in the edge region of the common projection lens. The edge region can also be constructed in the same way.
[0021] In particular, the protrusions in the second and third deflection sections can be configured as second-type protrusions, i.e., symmetrical protrusions.
[0022] Furthermore, it can be configured such that at least individual protrusions also have asymmetrically inclined sides relative to the horizontal extension along the common projection lens, and these protrusions are arranged side-by-side along the periphery of the emission side of the common projection lens when viewed in the horizontal direction. These protrusions can be arranged in the central region of the horizontal direction of the common projection lens and / or the edge region of the emission side.
[0023] In particular, it can be configured such that all protrusions have a maximum height of 5 micrometers and a maximum width of 1 millimeter.
[0024] Furthermore, the ratio of the width of the protrusion to the height of the protrusion can be configured to be between 10 and 1000, particularly between 50 and 200.
[0025] In other words, this invention allows for the creation of a microstructure for gap closure and gradient improvement in headlight modules. The microstructure (formed by protrusions) can be used for different purposes in the headlight. On the one hand, in pixel-like systems, it is used to blur / homogenize the light distribution or to close segment boundaries; on the other hand, in twin-systems, it is used to adjust the desired gradient direction and to close the gap between the low beam and high beam (the light from the low beam module is called the low beam, and the light from the high beam module is called the high beam). Different geometries and shapes of the microstructure can be employed in this principle. Furthermore, the lenses in many headlight modules are defocused to achieve a slightly softer HD line or to reduce the gap between the low beam and high beam. Due to defocusing, a "blue edge" is formed at the HD line, which is generally considered annoying. The blue gap between the low beam and high beam is particularly annoying, especially during high beam operation. This is because the two light distributions in the gap region are unfavorably superimposed. According to Figure 1 and Figure 2 In this arrangement, the blue portion of the low-light (near-light share) radiation passes through the lower part of the lens, while the yellow portion passes through the upper part. Due to defocus, these two distributions can shift relative to each other. For the high-light, the situation can be exactly the opposite (i.e., the blue portion shifts downward relative to the yellow portion). This can result in a very blue gap between the low-light and high-light. Another problem in the prior art is the adjustment of the gradient, as the blurring is the same in both light distributions until now. As a result, the blue portion of the HD line is stronger, and the risk of double gradients increases. Due to the uniform structure across the entire lens, the different regions of the lens's light distribution have not been explored or their color distribution taken into account until now. This leads to a strong blue HD line and double gradients. Double gradients are particularly problematic during adjustment, as the module can be incorrectly adjusted and may be legally non-compliant.
[0026] Furthermore, the gradient direction of the current structure is relatively wide and lacks a bounded global maximum, which can also lead to problems during adjustment. Therefore, according to the invention, the use of the asymmetrical protrusion is provided in the context of the device according to claim 1.
[0027] This invention offers several advantages:
[0028] • The headlights can be better adjusted; therefore, the headlights or their light pattern have a narrower and more defined gradient direction with a definite maximum value;
[0029] • The gap between high and low light can be closed better;
[0030] • HD lines don't have to be so blue.
[0031] By using different microstructures in different regions of the lens, the blue or yellow share of light distribution can be influenced separately. Additionally, asymmetric structures can achieve greater blurring upwards compared to downwards, and vice versa. This offers the following advantages:
[0032] The upper region of the lens can be covered by a structure that is more forcefully wiped upwards compared to downwards. This causes the yellow light to shift closer to the HD line.
[0033] The lower region of the lens can be covered using a structure that is more forcefully wiped downwards compared to upwards. This results in a reduction of the blue edging at the HD line.
[0034] Since the situation is exactly the opposite in highlights, the following can be observed with highlights:
[0035] The blue share of highlights passes through the upper part of the lens, so the blue share of highlights is swept upwards more than downwards. This causes a reduction in the blue share in the gap between low and high rays.
[0036] The yellow portion of the highlight passes through the lower part of the lens, so it is swept downwards more than upwards. This causes more yellow light to be swept into the gap between the low and high rays.
[0037] In summary, this results in a significant reduction in the blue share in the gap between low and high light.
[0038] Additionally, by processing the gradients of the blue and yellow portions of the light distribution separately, it is easier to adjust the overall gradient of the distribution.
[0039] Of course, asymmetric blurring can also be applied in the horizontal direction to prevent blurring due to asymmetry, for example, in HV. Attached Figure Description
[0040] The invention will now be explained in more detail with the aid of exemplary and non-limiting embodiments illustrated in the accompanying drawings. In the drawings:
[0041] Figure 1 A schematic diagram of a first embodiment of the present invention with an exemplary first ray beam is shown;
[0042] Figure 2 Showing according to Figure 1 An embodiment with an exemplary second ray beam;
[0043] Figure 3 An exemplary projection lens is shown, with a detailed portion of the lens's exit surface including the schematically shown protrusion;
[0044] Figure 4 The distribution of protrusions along the vertical extension of the lens is shown;
[0045] Figure 5 The distribution is shown according to Figure 4 A detailed view of the protrusion in the uppermost region (edge region) of the lens;
[0046] Figure 6 The distribution is shown according to Figure 4 A detailed view of the protrusion in the lowest region (edge region) of the lens;
[0047] Figure 7 The distribution is shown according to Figure 4 A detailed view of the protrusion in the lower central region of the lens;
[0048] Figure 8 The distribution is shown according to Figure 4 A detailed view of the protrusion in the upper central region of the lens; and
[0049] Figure 9 A detailed view of an exemplary horizontally distributed protrusion is shown.
[0050] In the following figures, unless otherwise stated, the same reference numerals denote the same features. Detailed Implementation
[0051] Figure 1 A vehicle headlight 1 is shown, comprising a low beam module 2 for generating a low beam distribution, wherein the low beam module 2 includes at least one light source 2a. Furthermore, the headlight 1 includes a high beam module 3 for generating a high beam distribution, wherein the high beam module 3 includes at least one light source 3a. Additionally, the headlight 1 has a projection lens 4 and a ray shield 5.
[0052] These two optical modules 2 and 3 are coupled with projection lens 4 as a common projection lens 4 and with ray blocking element 3 as a common ray blocking element 3. This means that light sources 2a and 3a are arranged such that the ray blocking element 5 is in the optical path from the respective light source 2a or 3a toward the common projection lens 4, so as to limit the light distribution emitted into the common projection lens 4, and the common projection lens 4 is arranged in the optical path of the two optical modules 2 and 3 such that the light rays emitted by optical modules 2 and 3 through the common ray blocking element 5 can be imaged onto the roadway in the form of a superimposed light distribution through the common projection lens 4, wherein the common projection lens 4 has an optical axis z.
[0053] For example, a ray beam L1 is shown that radiates past the beam shield 5 at its end in the form of beam L1' or strikes the beam shield 5 in the form of beam L1” and is reflected. The common projection lens 4 has a first deflection section 4a on its exit side 4' that extends transversely to the optical axis z along the periphery of the projection lens 4, upward and downward. This first deflection section is arranged on the surface of the projection lens 4, wherein, in this first deflection section 4a, the exit side 4' of the common projection lens 4 is deflected by protrusions 6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h arranged side-by-side (see...). Figure 3 The protrusions are defined by the connection of a first side surface 6a' facing the optical axis z and a second side surface 6a" facing away from the optical axis z (see exemplary protrusions). Figures 4 to 9 The protrusions generally include at least protrusions of the first type 6a, 6b, 6e, 6f, 6g, 6h, in which these sides are substantially asymmetrically constructed relative to each other. In this way, light rays can be directed in a targeted manner in a specific direction. Therefore, the deflection section 4a is located at the surface of the projection lens 4 and includes the protrusions for deflecting light. The protrusions can be offset relative to each other in the vertical and / or horizontal directions. In particular, these protrusions can be arranged in a square maser configuration. However, other shapes are also conceivable, such as hexagonal or even irregular shapes.
[0054] Figure 2 Showing according to Figure 1 In one embodiment, an exemplary second ray beam L2 is provided, which is divided into a non-reflective beam L2' and a reflected beam L2'". It can also be seen in the figure that a gap d exists between the beams L1' and L2', which are oriented parallel to each other, due to the extension of the ray-blocking member 5. Therefore, the technically determined spatial extension of the ray-blocking member 5 can cause gaps in the superposition of the light images of the two modules 2 and 3, which can also be compensated for by using the protrusion.
[0055] As in Figure 1 and Figure 2 As can be seen, the optical axis z of the common projection lens 4 can be configured to be substantially horizontally oriented, with the high beam module 3 offset downwards relative to the ray blocker 5, and the low beam module 2 offset upwards (along the axis y) relative to the ray blocker 5. The low beam module 2 and the high beam module 3 can each have a primary radiation direction, wherein the two modules 2 and 3 are tilted relative to the optical axis z of the common projection lens 4 such that the primary radiation directions of the two modules form the same angle relative to the optical axis z of the common projection lens 4, thereby oriented the beams L1' and L2" parallel to each other. Figure 1 and Figure 2 In the middle, the first deflection section 4a is arranged in the central region of the common projection lens 4. In detail, the central region can be arranged such that it extends upward and downward from the intersection of the optical axis z of the projection lens 4 and the emission surface 4', along a length of 25% of the circumference of the emission surface 4' in the cross-sectional view along the optical axis z.
[0056] Figure 4 The diagram shows the distribution of protrusions along the vertical extension of lens 4 (curved around the vertical axis y). The first segment 4a includes two sub-segments 4a' and 4a'', where the first sub-segment 4a' is arranged above the common optical axis z of the projection lens 4, and the second sub-segment 4a'' is arranged below the common optical axis z of the projection lens 4. The asymmetry of the protrusions in the second sub-segment 4a'' is more pronounced than the asymmetry of the protrusions in the first sub-segment 4a'. Each sub-segment 4a' and 4a'' has protrusions of the first type 6a, 6b, 6e, 6f. Generally, all protrusions can extend parallel to the optical axis z.
[0057] See Figure 7 and Figure 8It should be mentioned that the asymmetry of the first type of protrusions 6a, 6b, 6e, 6f is constructed such that the second sides 6a”, 6b”, 6e”, 6f” of the corresponding protrusions are constructed flatter than their first sides 6a’, 6b’, 6e’, 6f’. In particular, adjacent protrusions can be arranged such that adjacent protrusions are abutting each other in the vertical direction along the periphery of the exit side 4’ of the common projection lens 4. The first type of protrusions can be divided into first subtypes 6a, 6e and second subtypes 6b, 6f. The two subtypes of protrusions differ from each other at least in the geometry of their second sides, such that the second sides 6b” and 6f” of the second subtype are, on average, flatter than the second sides 6a” and 6e” of the first subtype. Protrusions of different subtypes can be arranged alternately side by side, such that each protrusion sandwiched by an adjacent protrusion is of a different subtype than its adjacent protrusion. Figure 7 As can be seen, the side 6a' of structure or protrusion 6a is very steep (strongly blurred downwards). Furthermore, another structure or protrusion 6b is superimposed on the basic structure, this other structure or protrusion having a flatter side 6b', and achieving finer gradient adjustment while taking into account key regions related to scattered light (e.g., HV in ECE). Figure 8 As can be seen, the asymmetry between protrusions 6e and 6f is related to... Figure 7 The asymmetry in the protrusions 6a and 6b shown in the figure is less pronounced compared to that in the figure.
[0058] exist Figure 1 In China and also in Figure 3 As can be seen, second and third deflection segments 4b and 4c are provided at the common projection lens 4, and the second and third deflection segments are respectively arranged in the edge region of the common projection lens 4. The edge regions can be constructed in different or the same type. Figure 5 and Figure 6 As can be seen, the protrusions 6c or 6d in the second or third deflection segments 4b and 4c are constructed as second-type protrusions, i.e., symmetrical protrusions. This means that the entire protrusion includes at least second-type protrusions 6c and 6d, in which the descending and ascending sides are constructed substantially symmetrically with respect to each other. Figure 3The structure formed by the protrusions can therefore consist of four parts. The uppermost or lowermost structure can be relatively symmetrical to each other and can be strongly blurred in the vertical line (steep sides). This results in strong softening in the edge regions of the HD line (where legal regulations have not yet come into effect) and slight softening of the gradient. In particular, it can be advantageous for the slight softening of the gradient to occur in the region of the light image, in a manner that is particularly useful due to legal requirements, i.e., according to ECE, at a height of -2.5° at a horizontal level within a vertical angle range of -1 to 1°.
[0059] Figure 9 A detailed view of an exemplary horizontally distributed protrusion is shown, wherein at least a single protrusion 6g, 6h also has a side 6g”, 6h” that is asymmetrically inclined relative to the horizontal extension along the common projection lens 4. These protrusions 6g and 6h are arranged side by side along the periphery of the emission side 4' of the common projection lens 4 when viewed in the horizontal direction. The protrusions may be arranged in the horizontal central region or in the edge region.
[0060] All protrusions may, for example, have a maximum height of 5 micrometers and a maximum width of 1 millimeter.
[0061] In particular, the ratio of the width of the protrusions 6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h to the height of the protrusions 6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h can be set between 10 and 1000, especially between 50 and 200.
[0062] Figure 5 It is distributed according to Figure 4 A detailed view of the protrusion in the uppermost region (edge region) of the lens.
[0063] This invention is not limited to the embodiments shown, but is defined by the entire scope of the claims. Individual aspects of the invention or embodiments may also be adopted and combined with each other. Possible reference numerals in the claims are exemplary and are only used to facilitate reading the claims, and are not limiting of the claims.
Claims
1. A vehicle headlight (1), the vehicle headlight comprising: - A low beam module (2) for generating a low beam distribution, wherein the low beam module (2) includes at least one light source (2a); and - A high beam module (3) for generating high beam distribution, wherein the high beam module (3) includes at least one light source (3a); - Projection lens (4); and - Radiation shielding component (5); The two optical modules (2,3) are coupled with a projection lens (4) serving as a common projection lens (4) and a ray-blocking member (3) serving as a common ray-blocking member (3), in such a way that the light sources (2a,3a) are arranged such that the common ray-blocking member (5) is in the optical path from the respective light source toward the common projection lens (4) to limit the light distribution emitted into the common projection lens (4), and the common projection lens (4) is arranged in the optical path of the two optical modules (2,3) such that the light rays emitted by the optical modules (2,3) passing through the common ray-blocking member (5) can be imaged onto the roadway in the form of a superimposed light distribution through the common projection lens (4), wherein the common projection lens (4) has an optical axis (z). Its features are, The common projection lens (4) has a first deflection section (4a) at its exit side (4') extending upward and downward along the periphery of the projection lens transverse to the optical axis (z). The first deflection section is arranged on the surface of the projection lens (4). In the first deflection section (4a), the exit side (4') of the common projection lens (4) is constructed by protrusions (6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h) arranged side by side. The protrusions are respectively defined by the connection of a first side surface (6a') facing the optical axis (z) and a second side surface (6a'') facing away from the optical axis (z). The total number of the protrusions includes at least protrusions of the first type (6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h). b,6e,6f,6g,6h), in the first type of protrusion, the sides are constructed substantially asymmetrically relative to each other, wherein the first deflection segment (4a) is arranged in the central region of the common projection lens (4), wherein the first deflection segment (4a) comprises two sub-segments (4a', 4a''), wherein the first sub-segment (4a') is arranged above the optical axis (z) of the common projection lens (4), and the second sub-segment (4a'') is arranged below the optical axis (z) of the common projection lens (4), wherein the asymmetry of the protrusion present in the second sub-segment (4a'') is constructed to be stronger than the asymmetry of the protrusion arranged in the first sub-segment (4a').
2. The vehicle headlight (1) according to claim 1, wherein, The asymmetry of the protrusions (6a, 6b, 6e, 6f) of the first type is constructed such that the second side (6a'', 6b'', 6e'', 6f') of the corresponding protrusion (6a, 6b, 6e, 6f) is constructed to be flatter than its first side (6a', 6b', 6e', 6f').
3. The vehicle headlight (1) according to claim 1, wherein, The protrusions generally include at least protrusions of the second type (6c, 6d), in which the descending side and the ascending side are constructed substantially symmetrically with respect to each other.
4. The vehicle headlight (1) according to claim 1, wherein, The optical axis (z) of the common projection lens (4) is oriented substantially horizontally, and the high beam module (3) is offset downward relative to the ray blocker (5), while the low beam module (2) is offset upward relative to the ray blocker (5).
5. The vehicle headlight (1) according to claim 4, wherein, The low beam module (2) and the high beam module (3) each have a main radiation direction, wherein the two modules (2,3) are tilted relative to the optical axis (z) of the common projection lens (4) such that the main radiation directions of the two modules form the same angle relative to the optical axis (z) of the common projection lens (4).
6. The vehicle headlight (1) according to any one of claims 1-5, wherein, Adjacent protrusions are adjacent to each other in the vertical direction along the periphery of the exit side (4') of the common projection lens (4).
7. The vehicle headlight (1) according to any one of claims 1-5, wherein, Each sub-segment (4a', 4a'') has a first type of protrusion (6a, 6b, 6e, 6f), and these protrusions can be divided into a first subtype (6a, 6e) and a second subtype (6b, 6f), wherein the two subtypes of protrusions are different from each other at least in terms of the geometry of their second side surfaces, such that the second side surfaces (6b'', 6f'') of the second subtype are, on average, more flat than the second side surfaces (6a'', 6e'') of the first subtype.
8. The vehicle headlight (1) according to claim 7, wherein, Different types of protrusions are arranged alternately side by side in such a way that each protrusion sandwiched by an adjacent protrusion is of a different subtype than its adjacent protrusion.
9. The vehicle headlight (1) according to any one of claims 1-5, wherein, A second deflection section and a third deflection section (4b, 4c) are provided at the common projection lens (4), and the second deflection section and the third deflection section are respectively arranged in the edge region of the common projection lens (4).
10. The vehicle headlight (1) according to claim 9, wherein, The protrusions in the second and third deflection sections (4b, 4c) are constructed as the second type of protrusions, that is, as symmetrical protrusions.
11. The vehicle headlight (1) according to any one of claims 1-5, wherein, At least individual protrusions (6g, 6h) also have asymmetrically inclined sides (6g'', 6h'') relative to the horizontal extension along the common projection lens (4), and these protrusions (6g, 6h) are arranged side by side along the periphery of the emission side (4') of the common projection lens (4) when viewed in the horizontal direction.
12. The vehicle headlight (1) according to any one of claims 1-5, wherein, All protrusions have a maximum height of 5 micrometers and a maximum width of 1 millimeter.
13. The vehicle headlight (1) according to any one of claims 1-5, wherein, The ratio of the width of the protrusions (6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h) to the height of the protrusions (6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h) is in the range of 10 to 1000.
14. The vehicle headlight (1) according to claim 13, wherein, The ratio of the width of the protrusions (6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h) to the height of the protrusions (6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h) is in the range of 50 to 200.