Vehicle headlights

Abstract

To provide a vehicular headlight that can restrain an irradiation pattern from blurring.SOLUTION: A vehicular headlight comprises: a plurality of light sources arranged in a left-right direction; a light source side lens arranged in front of the plurality of light sources to emit light frontward; and a projection lens arranged in front of the light source side lens, and for applying the light applied from the light source side lens, frontward from a vehicle. The light source side lens comprises an incidence surface on which the light from the plurality of light sources is incident. In the incidence surface, at least one groove part extending in an up-down direction is arranged at a position separated in the left-right direction from an optical axis of the projection lens. The groove part comprises an inclined part for refracting the light from the plurality of light sources to the side of the optical axis.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a vehicle headlamp.

Background Art

[0002] A vehicle headlamp that individually controls the lighting states of a plurality of light sources such as LEDs to form an ADB light distribution pattern in front of the vehicle is known.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a vehicle headlamp as described in Patent Document 1, when light from a plurality of light sources enters a position laterally separated from the center of the projection lens, blurring may occur in the irradiation pattern irradiated by the projection lens.

[0005] The present invention has been made in view of the above, and an object thereof is to provide a vehicle headlamp capable of suppressing blurring of an irradiation pattern.

Means for Solving the Problems

[0006] The vehicle headlamp according to the present invention includes a plurality of light sources arranged in the left-right direction, a light source-side lens arranged in front of the plurality of light sources and emitting light forward, and a projection lens arranged in front of the light source-side lens and irradiating the light irradiated from the light source-side lens in front of the vehicle. The light source-side lens has an incident surface on which light from the plurality of light sources enters, and at least one groove portion extending in the vertical direction is arranged at a position deviated in the left-right direction from the optical axis of the projection lens on the incident surface. The groove portion has an inclined portion that refracts light from the plurality of light sources toward the optical axis side. [Effects of the Invention]

[0007] The present invention provides a vehicle headlight capable of suppressing blurring of the illumination pattern. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a perspective view showing an example of a vehicle headlight according to this embodiment. [Figure 2] Figure 2 shows an example of a lens on the light source side. [Figure 3] Figure 3 shows an example of a lens on the light source side. [Figure 4] Figure 4 shows an example of a lens on the light source side. [Figure 5] Figure 5 shows an example of a lens on the light source side. [Figure 6] Figure 6 shows an example of a lens on the light source side. [Figure 7] Figure 7 shows an example of a lens on the light source side. [Figure 8] Figure 8 shows an example of the operation of a vehicle's headlights. [Figure 9] Figure 9 shows an example of the operation of a vehicle's headlights. [Figure 10] Figure 10 shows an example of the operation of a vehicle headlight. [Figure 11] Figure 11 shows an example of an ADB pattern using vehicle headlights. [Modes for carrying out the invention]

[0009] Hereinafter, embodiments of the vehicle headlight according to the present invention will be described with reference to the drawings. However, the present invention is not limited by these embodiments. Furthermore, the components in the following embodiments include those that are easily substituted or substantially identical to those that are easily substituted by those skilled in the art.

[0010] In the following description, the forward / backward, up / down, and left / right directions refer to the directions when the vehicle headlight is mounted on a vehicle, as viewed from the driver's seat in the direction of vehicle travel. In this embodiment, the up / down direction is parallel to the vertical direction, and the left / right direction is the horizontal direction. Also in this embodiment, the front and rear directions refer to the directions when the headlight is mounted on a vehicle (vehicle-mounted state). For example, when mounted on the front of a vehicle, the front is the forward direction (front side), and the rear is the rear direction (rear side).

[0011] Figure 1 is a perspective view showing an example of a vehicle headlight 100 according to this embodiment. As shown in Figure 1, the vehicle headlight 100 comprises a plurality of light sources 10, a light source side lens 20, and a projection lens 30. The vehicle headlight 100 forms an ADB (Adaptive Detachable Brake) light distribution pattern in front of the vehicle by individually controlling the lighting and extinguishing of the plurality of light sources 10. The vehicle headlights 100 are arranged on the left and right sides of the front of the vehicle. In this embodiment, the vehicle headlight 100 arranged on the right side of the vehicle will be described as an example. Note that the vehicle headlight arranged on the left side of the vehicle has a configuration that is symmetrical to, for example, the vehicle headlight 100 according to this embodiment.

[0012] The multiple light sources 10 are semiconductor-type elements such as LEDs (Light Emitting Diodes). The multiple light sources 10 are arranged in a left-to-right direction. In this embodiment, for example, 12 light sources 10 are arranged in a left-to-right direction. The left-to-right pitch of the multiple light sources 10 is not particularly limited; for example, they may all be the same, they may all be different, or at least two of them may have the same pitch.

[0013] One of the plurality of light sources 10 is arranged on the optical axis AX of the projection lens 30. The interval between adjacent light sources 10 in the left-right direction may vary depending on the light source 10. Also, the number of light sources 10 arranged on the left side of the optical axis AX is larger than the number of light sources 10 arranged on the right side of the optical axis AX. The plurality of light sources 10 have the emission surface 11 directed forward of the vehicle. The plurality of light sources 10 are mounted on a substrate (not shown) on which wirings and the like are formed. The substrate is supported by a support member such as a heat sink.

[0014] The light source-side lens 20 is arranged in front of the plurality of light sources 10. FIGS. 2 to 7 are diagrams showing an example of the light source-side lens 20. FIG. 2 is a view seen from obliquely in front, FIG. 3 is a view seen from above, FIG. 4 is a view seen from behind, and FIG. 5 is a diagram showing the configuration along the A-A cross section of FIG. 4. FIG. 6 is a diagram showing an enlarged view of the configuration on the left side with respect to the optical axis AX of the projection lens 30 in FIG. 3. FIG. 7 is a diagram showing an enlarged view of the configuration on the right side with respect to the optical axis AX of the projection lens 30 in FIG. 3. As shown in FIGS. 1 to 7, the light source-side lens 20 has an incident surface 21 and an exit surface 22.

[0015] The incident surface 21 receives light from the plurality of light sources 10. The incident surface 21 is curved such that the central portion in the vertical direction protrudes toward the light source 10 side in a longitudinal cross-sectional view (see FIG. 5).

[0016] The incident surface 21 has a groove portion 24. The groove portion 24 is disposed at a position deviated from the optical axis AX of the projection lens 30 in the left - right direction. In the present embodiment, a plurality of groove portions 24 are arranged. For example, four are arranged on the inner side (left side) of the vehicle in the left - right direction with respect to the optical axis AX, and two are arranged on the outer side (right side) of the vehicle. That is, the number of groove portions 24 is larger on the inner side of the vehicle in the left - right direction with respect to the optical axis AX than on the outer side of the vehicle in the left - right direction with respect to the optical axis AX. In the present embodiment, the vehicle headlamp 100 is configured to be disposed on the right side of the vehicle, and the number of light sources 10 disposed on the left side (the inner side of the vehicle with respect to the optical axis AX) is larger than the number of light sources 10 disposed on the right side (the outer side of the vehicle with respect to the optical axis AX). Therefore, corresponding to this configuration, the number of groove portions 24 is larger on the left side of the optical axis AX than on the right side of the optical axis AX. Thus, the number of groove portions 24 disposed on the left side of the optical axis AX and the number of groove portions 24 disposed on the right side of the optical axis AX can be made different.

[0017] Note that the groove portion 24 may be one. Also, in the present embodiment, the groove portion 24 is disposed on both the left and right sides of the optical axis AX, but is not limited to this configuration. For example, a configuration in which the groove portion 24 is disposed only on one of the left and right sides of the optical axis AX may be used. Further, for example, the groove portion 24 may not be disposed on the outer side (right side) of the vehicle in the left - right direction with respect to the optical axis AX.

[0018] The plurality of groove portions 24 are arranged at intervals in the left - right direction. The groove portion 24 extends in the up - down direction. The width of the groove portion 24 is substantially uniform in the up - down direction. The plurality of groove portions 24 may have different widths in the left - right direction.

[0019] Each groove portion 24 is formed in a V - shape in a top view (see FIG. 3) such that the depth gradually increases from both sides in the left - right direction toward the central portion. The groove portion 24 has an inclined portion 25 and a connecting portion 26. The inclined portion 25 and the connecting portion 26 are, for example, linear in cross - section and are provided inclined with respect to a plane perpendicular to the optical axis AX. In one groove portion 24, the inclined portion 25 is provided on one side in the left - right direction, and the connecting portion 26 is provided on the other side in the left - right direction.

[0020] The inclined portion 25 is formed in a shape that refracts light from multiple light sources 10 toward the optical axis AX. For example, among the grooves 24 located to the left of the optical axis AX, the grooves 24 other than the groove 24 located at the leftmost end in the left-right direction are formed so that the inclined portion 25 tilts forward toward the right. Also, the grooves 24 located at the leftmost end in the left-right direction are formed so that the inclined portion 25 tilts forward toward the left. Hereinafter, when distinguishing between the inclined portions 25, the inclined portion 25 of the groove 24 located at the leftmost end in the left-right direction among the grooves 24 located to the left of the optical axis AX will be referred to as inclined portion 25b, and the inclined portion 25 of the other grooves 24 will be referred to as inclined portion 25a (see Figure 6, etc.).

[0021] Furthermore, the groove 24 located to the right of the optical axis AX is formed such that the inclined portion 25 tilts forward toward the left. However, the groove 24 located at the right end in the left-right direction is formed such that the inclined portion 25 tilts forward toward the right. Hereafter, when distinguishing between the inclined portions 25, the inclined portion 25 of the groove 24 located at the right end in the left-right direction in the groove 24 located to the right of the optical axis AX will be referred to as inclined portion 25d, and the inclined portion 25 of the other grooves 24 will be referred to as inclined portion 25c (see Figure 7, etc.).

[0022] In one groove 24, the inclined portion 25 and the connecting portion 26 each have a rounded shape at the boundary with the incident surface 21. Furthermore, the boundary between the inclined portion 25 and the connecting portion 26 also has a rounded shape.

[0023] Viewed from the optical axis direction along the optical axis AX, each groove 24 is positioned such that at least a portion of the incident surface 21 facing each light source 10 is left open. In other words, when viewed from the optical axis direction, at least a portion of each light source 10 is positioned to face the incident surface 21 between adjacent grooves 24 in the left-right direction. Furthermore, when viewed from the optical axis direction, each groove 24 is positioned such that the inclined portion 25 is located between adjacent light sources 10 in the left-right direction.

[0024] The emission surface 22 is where light incident from the incidence surface 21 is emitted. As shown in Figure 3, the emission surface 22 has a central portion 22a located in the center in the left-right direction and curved portions 22b located on both sides in the left-right direction. The optical axis AX passes through the central portion 22a. The central portion 22a is, for example, cylindrical, and when viewed from above, its front end is straight.

[0025] The curved portion 22b is formed to curve toward the back side from the central portion 22a to both ends in the left and right directions. The groove portion 24 described above can be positioned, for example, in the portion corresponding to the curved portion 22b when viewed from the optical axis direction along the optical axis AX. In addition, the exit surface 22 is formed to curve toward the back side from the central portion in the vertical direction to both the upper and lower sides when viewed in a vertical cross-sectional view (see Figure 5). As a whole, the central portion 22a and the left and right curved portions 22b have a seamless shape with continuous tangents and continuous curvature.

[0026] In this embodiment, the light source 10 is provided over a wider area in the left-right direction than on the right side of the optical axis AX of the projection lens 30. Therefore, to correspond to the arrangement of the light source 10, the right-side curved portion 22b has a shape that is symmetrical to the left-side curved portion 22b, with a portion of the right end cut off. Consequently, the left-side curved portion 22b is provided over a wider area than the right-side curved portion 22b. The left and right curved portions 22b are curved with equal curvature from the central portion 22a toward the left and right in the left-right direction, respectively.

[0027] The light source side lens 20 is provided with mounting portions 23. The mounting portions 23 are located on both sides of the light source side lens 20 in the left-right direction. The mounting portions 23 are attached via fixing members (not shown), such as screws.

[0028] The projection lens 30 is positioned in front of the light source side lens 20. The projection lens 30 is held by a holding part (not shown) or the like. The projection lens 30 has an incident surface 31 and an outgoing surface 32. Light from the light source side lens 20 enters the incident surface 31. The outgoing surface 32 emits the light that entered from the incident surface 31 forward of the vehicle to form an ADB pattern.

[0029] Next, the operation of the vehicle headlight 100 configured as described above will be explained. Figures 8 to 10 show an example of the operation of the vehicle headlight 100. Figures 9 and 10 are enlarged views of a portion of Figure 8. Figures 9 and 10 show the configuration along a cross-section parallel to the horizontal plane.

[0030] By illuminating the multiple light sources 10 of the vehicle headlight 100, light is emitted from the light-emitting surface 11. Of the multiple light sources 10, the light L1 from the light source 10 positioned in the area corresponding to the central part 22a of the emission surface 22 when viewed from the optical axis direction along the optical axis AX enters the light source-side lens 20 from the incident surface 21 and is emitted forward from the emission surface 22, as shown in Figure 8. This light L1 enters the projection lens 30 from the incident surface 31 and is emitted from the emission surface 32, forming at least a portion of the ADB pattern in front of the vehicle.

[0031] Furthermore, of the multiple light sources 10, the light from the light source 10 positioned in the range corresponding to the curved portion 22b on the left side of the emission surface 22, as shown in Figure 8, has some light L2 incident from the incident surface 21 between the grooves 24 arranged in the left-right direction, and some light L3 incident from the inclined portion 25a of the grooves 24. Also, for example, the light emitted from the light source 10 positioned at the left end has some light L4 incident from the inclined portion 25b of the grooves 24, and some light L5 incident from the incident surface 21 located to the left of the leftmost groove 24 (hereinafter referred to as the left end portion 21a of the incident surface 21).

[0032] Light L2 incident from the incident surface 21 is emitted, for example, from the central part 22a of the exit surface 22 and reaches the incident surface 31 of the projection lens 30.

[0033] Light L3 incident from the inclined portion 25a of the groove 24 is refracted toward the optical axis AX by the inclined portion 25a and is emitted from the central portion 22a or the curved portion 22b of the emission surface 22. This light L3 reaches the optical axis AX side of the incident surface 31 of the projection lens 30 more than light L3a (shown as a dashed line in Figures 8 and 9) when the inclined portion 25a is not provided.

[0034] Light L4 incident from the inclined portion 25b of the groove 24 is refracted toward the optical axis AX by the inclined portion 25b and exits from the curved portion 22b of the exit surface 22. This light L4 is refracted such that the angle it makes with the optical axis AX is smaller than that of light L4a (shown as a dashed line in Figures 8 and 9) when the inclined portion 25b is not provided, and reaches the optical axis AX side of the incident surface 31 of the projection lens 30.

[0035] Light L5 incident from the left end 21a of the incident surface 21 is refracted toward the optical axis AX by the curved portion 22b of the exit surface 22 and exits, reaching the incident surface 31 of the projection lens 30. If the curved portion 22b is not formed, light L5a incident from the left end incident surface 21 (shown by a dashed line in Figures 8 and 9) will exit from the side of the light source side lens 20 and will not reach the projection lens 30. In contrast, with the formation of the curved portion 22b, light L5 incident from the left end incident surface 21 is refracted toward the optical axis AX by the curved portion 22b of the exit surface 22 and exits, thus reaching the incident surface 31 of the projection lens 30. This increases the efficiency of light utilization.

[0036] Furthermore, of the multiple light sources 10, the light from the light source 10 located in the range corresponding to the curved portion 22b on the right side of the emission surface 22, as shown in Figures 8 and 9, has some light L6 incident from the incident surface 21 between the grooves 24 that are aligned in the left-right direction. Also, some light L7 is incident from the inclined portion 25c of the groove 24. In addition, for example, the light emitted from the light source 10 located at the left end has some light L8 incident from the inclined portion 25d of the groove 24, and some light L9 is incident from the incident surface 21 located to the right of the groove 24 at the right end (hereinafter referred to as the right end portion 21b of the incident surface 21).

[0037] Light L6 incident from the incident surface 21 is emitted, for example, from the central part 22a of the exit surface 22 and reaches the incident surface 31 of the projection lens 30.

[0038] Light L7 incident from the inclined portion 25b of the groove 24 is refracted toward the optical axis AX by the inclined portion 25c and is emitted from the central portion 22a or the curved portion 22b of the emission surface 22. This light L7 reaches the optical axis AX side of the incident surface 31 of the projection lens 30 more than light L7a (shown as a dashed line in Figures 8 and 10) when the inclined portion 25c is not provided.

[0039] Light L8 incident from the inclined portion 25d of the groove 24 is refracted toward the optical axis AX by the inclined portion 25d and exits from the curved portion 22b of the exit surface 22. This light L8 is refracted such that the angle it makes with the optical axis AX is smaller than that of light L8a (shown as a dashed line in Figures 8 and 10) when the inclined portion 25d is not provided, and reaches the optical axis AX side of the incident surface 31 of the projection lens 30.

[0040] Light L9 incident from the rightmost end 21b of the incident surface 21 is refracted toward the optical axis AX by the curved portion 22b of the exit surface 22 and exits, reaching the incident surface 31 of the projection lens 30. If the curved portion 22b is not formed, light L9a incident from the rightmost incident surface 21 (shown by a dashed line in Figures 8 and 10) will exit from the side of the light source side lens 20 and will not reach the projection lens 30. In contrast, with the formation of the curved portion 22b, light L9 incident from the rightmost incident surface 21 is refracted toward the optical axis AX by the curved portion 22b of the exit surface 22 and exits, thus reaching the incident surface 31 of the projection lens 30. This increases the efficiency of light utilization.

[0041] Figure 11 shows an example of an ADB pattern formed by a vehicle headlight. In Figure 11, the HH line represents a horizontal line, and the VV line represents a line parallel to the vertical direction (hereinafter referred to as the vertical line). As described above, the light L1 to L9 that reach the incident surface 31 are incident from the incident surface 31 and emitted from the exit surface 32, forming an ADB pattern P in front of the vehicle. As shown in Figure 11, the ADB pattern P is arranged with patterns P1 to P12 corresponding to the light source 10, which partially overlap in the left-right direction. The central region PA of the ADB pattern P is formed by the central region 20A of the light source side lens 20 (see Figure 11). The left region PB of the ADB pattern P is formed by the left region 20B of the light source side lens 20 (see Figure 11). The right region PC of the ADB pattern P is formed by the right region 20C of the light source side lens 20 (see Figure 11).

[0042] As described above, the vehicle headlight 100 according to this embodiment comprises a plurality of light sources 10 arranged in the left-right direction, a light source side lens 20 positioned in front of the plurality of light sources 10 and emitting light forward, and a projection lens 30 positioned in front of the light source side lens 20 and projecting the light emitted from the light source side lens 20 toward the front of the vehicle. The light source side lens 20 has an incident surface 21 into which light from the plurality of light sources 10 enters, and at least one groove portion 24 extending in the vertical direction is arranged on the incident surface 21 at a position offset in the left-right direction from the optical axis AX of the projection lens 30, and the groove portion 24 has an inclined portion 25 that refracts the light from the plurality of light sources 10 toward the optical axis AX.

[0043] In this configuration, when light from multiple light sources 10 is incident on the incident surface 21 of the light source-side lens 20 at a position far to the left and right with respect to the optical axis AX of the projection lens 30, some of the light is refracted toward the optical axis AX by the inclined portion 25 of the groove 24. Therefore, compared to a configuration without the groove 24 and inclined portion 25, the light emitted from the light source-side lens 20 can reach the optical axis AX side of the projection lens 30. In this way, since the illumination pattern can be formed using the vicinity of the optical axis AX in the left and right direction of the projection lens 30, the illumination pattern can be formed while suppressing the use of the outer peripheral portion where the effects of aberrations are large. This makes it possible to suppress blurring of the illumination pattern. For example, if the curvature of the exit surface 32 of the projection lens 30 is reduced, the use of the outer peripheral portion where the effects of aberrations are large can be suppressed, so blurring can be suppressed in the illumination pattern formed at a position far to the left and right from the center.

[0044] In the vehicle headlight 100 according to this embodiment, the groove 24 is arranged such that, when viewed from the optical axis direction along the optical axis AX, at least a portion of the incident surface 21 facing each light source 10 is left open. With this configuration, by arranging the incident surface 21 in at least a portion of the portion facing each light source 10, light traveling from the light source 10 forward and incident on the incident surface 21 can reach a predetermined portion of the incident surface 31 of the projection lens 30. Therefore, blurring of the illumination pattern can be reliably suppressed.

[0045] In the vehicle headlight 100 according to this embodiment, the groove portion 24 is arranged such that the inclined portion 25 is located between adjacent light sources 10 in the left-right direction when viewed from the optical axis direction along the optical axis AX. With this configuration, light directed diagonally from the light source 10 to the left and right can be reliably refracted toward the optical axis AX side by the inclined portion 25.

[0046] In the vehicle headlight 100 according to this embodiment, multiple grooves 24 are arranged at intervals in the left-right direction. With this configuration, the light emitted from the light source side lens 20 can reach the optical axis AX side of the projection lens 30 by refracting light through the multiple grooves 24.

[0047] In the vehicle headlight 100 according to this embodiment, the grooves 24 are positioned on both the left and right sides of the optical axis AX. With this configuration, the light that reaches both the left and right sides of the optical axis AX on the incident surface 21 is refracted by the grooves 24, thereby ensuring that the light emitted from the light source side lens 20 reaches the optical axis AX side of the projection lens 30 more reliably.

[0048] In the vehicle headlight 100 according to this embodiment, multiple grooves 24 are arranged on the left and right outer sides of the vehicle with respect to the optical axis AX. With this configuration, the light that reaches the left and right outer sides of the vehicle with respect to the optical axis AX from the incident surface 21 is refracted by the grooves 24, so that the light emitted from the light source side lens 20 can reach the optical axis AX side of the projection lens 30 more reliably.

[0049] In the vehicle headlight 100 according to this embodiment, the number of grooves 24 located to the left of the optical axis AX is different from the number of grooves 24 located to the right of the optical axis AX. With this configuration, the number of grooves 24 located to the left and right of the optical axis AX can be flexibly set according to conditions such as whether the vehicle headlight 100 is located on the left or right side of the vehicle.

[0050] In the vehicle headlight 100 according to this embodiment, the light source side lens 20 has an exit surface 22 through which light incident on the incident surface 21 is emitted, and the exit surface 22 has a curved portion 22b that curves toward the back side from the central portion 22a through which the optical axis AX passes to both ends in the left and right directions. With this configuration, the light that reaches both sides of the exit surface 22 in the left and right directions can be emitted in a state where it is refracted toward the optical axis AX side by the curved portion 22b. As a result, more light that reaches the exit surface 22 can reach the projection lens 30 compared to a configuration without a curved portion 22b. This makes it possible to improve the efficiency of light utilization.

[0051] In the vehicle headlight 100 according to this embodiment, the groove 24 is positioned in a portion that overlaps with the curved portion 22b when viewed from the optical axis direction along the optical axis AX. With this configuration, the light that is refracted by the groove 24 on the incident surface 21 side and reaches the curved portion 22b can be curved toward the optical axis AX side by the curved portion 22b, so that the light can reach the vicinity of the optical axis AX of the projection lens 30 more reliably.

[0052] The technical scope of the present invention is not limited to the embodiments described above, and modifications can be made as appropriate without departing from the spirit of the invention. [Explanation of Symbols]

[0053] AX...Optical axis, 10...Light source, 11...Emitting surface, 20...Light source side lens, 21,31...Incident surface, 21a...Left end, 21b...Right end, 22,32...Emitting surface, 22a...Center part, 22b...Curved part, 23...Mounting part, 24...Groove part, 25,25a,25b,25c,25d...Inclined part, 26...Connection part, 30...Projection lens, 100...Vehicle headlight

Claims

1. Multiple light sources arranged in the left-right direction, A light source-side lens positioned in front of multiple light sources and emitting light forward, A projection lens is positioned in front of the light source side lens and projects the light emitted from the light source side lens forward onto the vehicle. Equipped with, The light source-side lens has an incident surface into which light from multiple light sources is incident, On the incident surface, at least one groove extending in the vertical direction is positioned off to the left and right from the optical axis of the projection lens. The groove portion has an inclined portion that refracts light from the multiple light sources toward the optical axis. Vehicle headlights.

2. The groove is positioned such that, when viewed from the optical axis direction along the optical axis, at least a portion of the incident surface facing each of the light sources is left open. The vehicle headlight according to claim 1.

3. The groove portion is positioned such that, when viewed from the optical axis direction along the optical axis, the inclined portion is located between adjacent light sources in the left-right direction. The vehicle headlight according to claim 2.

4. Multiple grooves are arranged with spacing between them in the left-right direction. The vehicle headlight according to claim 2.

5. The grooves are positioned on both the left and right sides of the optical axis. The vehicle headlight according to claim 4.

6. Multiple grooves are arranged on the outer side of the vehicle in the left-right direction with respect to the optical axis. The vehicle headlight according to claim 4.

7. The number of grooves located to the left of the optical axis is different from the number of grooves located to the right of the optical axis. The vehicle headlight according to claim 6.

8. The light source side lens has an exit surface from which light incident on the incident surface is emitted. The emission surface has a curved portion that curves toward the back side from the central part through which the optical axis passes to both ends in the left-right direction. The vehicle headlight according to claim 1.

9. The groove is positioned in the portion that overlaps with the curved portion when viewed from the optical axis direction along the optical axis. The vehicle headlight according to claim 8.

Images