Vehicle headlamp

Abstract

A vehicle headlamp (1) is provided with: a light source (20); a super-lens (30) having a super-surface region through which the light (L) emitted from the light source (20) passes, the super-surface region having arranged therein a plurality of nanostructures (35) having a width smaller than the longest wavelength of the light (L) emitted from the light source (20); and a projection lens (50) through which the light (L) emitted from the super-lens (30) passes, the super-lens (30) emitting the light (L) incident from the light source (20) toward the super-surface region by reducing the divergence angle of the light (L), and when the light source (20) is viewed from the projection lens (50) side through the super-surface region, the light (L) emitted from the super-lens (30) is reduced by the divergence angle of the light (L) incident from the light source (20) toward the super-surface region. An image (20 ') of the light source (20) looks farther than the position of the light source (20) and looks smaller than an image (20' ') of the light source (20) seen when the light source (20) is viewed from the projection lens (50) side via the convex lens (30' ') by disposing the convex lens (30' ') instead of the super lens (30). The light (L) from the light source (20) is emitted at the same divergence angle as the light emitted from the super lens (30).

Description

Technical Field

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

[0002] As a vehicle headlamp such as an automobile headlamp, there is known a vehicle headlamp in which light emitted from a light source passes through a main lens and enters a projection lens. Such a vehicle headlamp is disclosed in Patent Document 1 listed below.

[0003] A convex lens is used as the main lens of the vehicle headlamp described in Patent Document 1 listed below. Therefore, the light emitted from the light source has a smaller divergence angle at the main lens and is incident on the projection lens.

[0004] Patent Document 1: (Japanese) Patent Publication No. 2018-67523 Summary of the invention

[0005] As in the vehicle headlamp of the above-mentioned Patent Document 1, by arranging a main lens that reduces the divergence angle of light from the light source between the light source and the projection lens, the light emitted from the light source can be efficiently incident on the projection lens. However, in the case where the main lens is composed of a convex lens, when the light source is observed from the projection lens through the main lens, the image of the light source appears larger than the actual light source at a position farther than the actual light source. Therefore, the light distribution pattern of the light emitted from the projection lens becomes larger, and in the light distribution pattern, the resolution of the light is reduced and the brightness is reduced. In order to prevent this situation, it is necessary to enlarge the projection lens and move the projection lens away from the main lens. However, there is a need to suppress the enlargement of vehicle headlamps.

[0006] Therefore, an object of the present invention is to provide a vehicle headlamp capable of efficiently emitting light while suppressing enlargement.

[0007] In order to achieve the above-mentioned purpose, the vehicle headlamp of the present invention is characterized in that it comprises: a light source; a super lens having a super surface area, wherein the super surface area is arranged with a plurality of nano structures having a width smaller than the longest wavelength of the light emitted from the light source, and allows the light emitted from the light source to pass through; and a projection lens through which the light emitted from the super lens passes, wherein the super lens reduces the divergence angle of the light incident from the light source to the super surface area and emits the light, and when the light source is observed from the projection lens side through the super surface area, the image of the light source appears to be at a position farther than the position of the light source and appears to be smaller than the image of the light source seen when a convex lens is arranged in place of the super lens in a manner that the light from the light source is emitted at the same divergence angle as the light emitted from the super lens and the light source is observed from the projection lens side through the convex lens.

[0008] In the vehicle headlamp, the divergence angle of the light from the light source becomes smaller by using the metal lens as the main lens. Therefore, according to the vehicle headlamp, the light can be efficiently incident on the projection lens, and the light can be efficiently emitted. In addition, in the vehicle headlamp, as described above, when the light source is observed from the projection lens side through the metasurface area, the image of the light source appears to be at a position farther than the position of the light source, and the image of the light source appears to be smaller than the image of the light source seen when a convex lens is configured in the following manner to replace the metal lens and the light source is observed from the projection lens side through the convex lens, wherein the light from the light source is emitted at the same divergence angle as the light emitted from the metal lens. Therefore, compared with the case of using a convex lens as the main lens, the size of the projection lens is smaller, and even if the position of the projection lens is close to the light source, the light distribution pattern of the light emitted from the projection lens can be suppressed from becoming larger, and the reduction in the resolution of the light and the reduction in the brightness can be suppressed.

[0009] Furthermore, when the light source is observed from the projection lens side through the super-surface region, the image of the light source may appear to be equal in size to the light source at a position farther than the position of the light source.

[0010] Furthermore, in the above-mentioned vehicle headlamp, preferably, the amount of change in the structure of the nanostructure increases from the center side of the super surface region toward the outer peripheral side.

[0011] By configuring in this way, it is possible to easily design a hypersurface region that reduces the divergence angle of light as described above and the image of the light source when the light source is observed from the projection lens side through the hypersurface region looks as described above.

[0012] In addition, the above-mentioned vehicle headlamp may include an outer frame and an inner frame, wherein the outer frame surrounds the light source, the super lens, and the projection lens, and the inner frame surrounds the light source, and the super lens is a part of the inner frame.

[0013] In this case, the internal light source, super lens, and projection lens are protected by the external frame, and the light source is protected by the internal frame from dust, etc. In addition, by making the super lens a part of the internal frame, the size of the internal frame can be miniaturized compared to the case where the super lens is located inside the internal frame, which can contribute to the miniaturization of the vehicle headlamp.

[0014] In this case, it is preferable that the nanostructure is formed on the inner space side of the inner frame.

[0015] Since the nanostructure is formed on the inner space side of the inner frame, it is possible to suppress dust from being attached to the nanostructure.

[0016] As described above, according to the present invention, there is provided a vehicle headlamp capable of efficiently emitting light while suppressing enlargement. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view schematically showing a vehicle headlamp according to an embodiment of the present invention.

[0018] Figure 2 It is schematically indicated Figure 1 Front view of the light source shown.

[0019] Figure 3 It is a magnified representation Figure 1 A front view of a portion of one principal surface of the metalens shown.

[0020] Figure 4 It is schematically indicated Figure 1 A cross-sectional view of the metalens shown.

[0021] Figure 5 This is a diagram for explaining the condition under which the image of a light source appears to be the same size as the light source.

[0022] Figure 6 It is a diagram showing a modified example of the vehicle headlamp according to the embodiment of the present invention. DETAILED DESCRIPTION

[0023] Hereinafter, the preferred embodiment of the vehicle headlamp of the present invention will be described in detail with reference to the accompanying drawings. The following exemplary embodiments are for the purpose of facilitating the understanding of the present invention and are not intended to limit the interpretation of the present invention. The present invention can be changed and improved without departing from its main purpose. It should be noted that in the accompanying drawings referred to below, the dimensions of each component are sometimes changed for easy understanding.

[0024] Figure 1 FIG. 2 is a diagram showing a vehicle headlamp according to an embodiment of the present invention, and is a diagram schematically showing a cross section of the vehicle headlamp in a vertical direction. Figure 1 As shown, the vehicle headlamp 1 of the present embodiment includes an outer housing 10 , a light source 20 , an inner housing 40 including a super lens 30 , and a projection lens 50 as main components.

[0025] The outer frame 10 has an outer shell 11 and a front cover 12 as main structures. The front of the outer shell 11 is open, and the front cover 12 is fixed to the outer shell 11 in a manner of blocking the opening. The outer shell 11 and the front cover 12 form a space S1, and the light source 20, the inner frame 40 and the projection lens 50 are stored in the space S1. The projection lens 50, the super lens 30 and the light source 20 are arranged in a front-to-back direction.

[0026] Figure 2 It is schematically indicated Figure 1 20 is a front view of the light source 20 shown in FIG. In this embodiment, the light source 20 includes a plurality of light emitting elements 21 for emitting light L and a circuit substrate 22 on which the plurality of light emitting elements 21 are mounted. Figure 2 In the figure, for the sake of convenience, only one light emitting element 21 is marked with a reference numeral, and the reference numerals of other light emitting elements 21 are omitted. A plurality of light emitting elements 21 are arranged in a matrix, have an emission surface of light L located on substantially the same plane, and emit light L toward the front. The light emitted from each light emitting point of each light emitting element 21 is a spherical wave, having a predetermined divergence angle. Therefore, the light L emitted from each light emitting element 21 propagates forward while expanding at a predetermined divergence angle. A plurality of light emitting elements 21 can change the light amount of the emitted light L respectively. In the present embodiment, the light emitting element 21 is an LED (Light Emitting Diode) that emits white light, and the light source 20 is a so-called LED array. It should be noted that the number and structure of the light emitting elements 21 are not particularly limited. For example, the light emitting element 21 may be a structure including a plurality of LEDs that emit light of different wavelengths from each other, or a structure including a plurality of LDs (Laser Diodes) that emit light of different wavelengths from each other and a phosphor provided on the LD. In addition, the light source 20 may also be composed of a single light emitting element.

[0027] The light source 20 having a plurality of light emitting elements 21 can emit light L having a predetermined light distribution pattern by selecting the light emitting element 21 that emits the light L, and the light distribution pattern can be changed by changing the selection. In addition, the light source 20 can adjust the intensity distribution of the light L in the light distribution pattern by adjusting the amount of light emitted from each light emitting element 21. It should be noted that even if the light source 20 has a plurality of light emitting elements 21, the light distribution pattern of the emitted light L may not be changed.

[0028] The internal frame 40 has an internal housing 41 and a super lens 30 as main structures. The front of the internal housing 41 is open, and the super lens 30 is fixed to the internal housing 41 in a manner that blocks the opening. The internal housing 41 and the super lens 30 form an internal space S2, and the light source 20 is accommodated in the internal space S2. It should be noted that in this embodiment, the internal space S2 is sealed by the internal housing 41 and the super lens 30.

[0029] In the present embodiment, the super lens 30 fixed to the internal housing 41 is a substantially flat plate-shaped member configured to adjust the divergence angle of the transmitted light L. The super lens 30 is arranged in front of the light source 20, and the light L emitted from the light source 20 is incident on the incident surface 31s facing the inside of the internal frame 40, and is emitted from the emission surface 32s facing the outside of the internal frame 40.

[0030] Figure 3 It is a magnified representation Figure 1 FIG. 3 is a front view of a portion of the incident surface 31s of the super lens 30 shown in FIG. Figure 3 As shown, the incident surface 31s has a plurality of cells 33 divided into a matrix shape, and each cell 33 is provided with a nanostructure 35 extending perpendicularly to the in-plane direction of the incident surface 31s. Therefore, in this embodiment, the nanostructure 35 is formed on the inner space S2 side of the inner frame 40. It should be noted that Figure 3 , the boundary between adjacent units 33 is represented by a dotted line. In addition, for ease of observation, only one unit 33 and one nanostructure 35 are marked with reference numerals, and the reference numerals of other units 33 and nanostructures 35 are omitted. In the superlens 30 of the present embodiment, a plurality of units 33 are arranged throughout the entire incident surface 31s, and the incident surface 31s as a whole is a supersurface region in which a plurality of units 33 including nanostructures 35 are arranged. In addition, an axis 36 orthogonal to the incident surface 31s at the center 31c of the incident surface 31s intersects with the center of the light source 20 and is perpendicular to the light-emitting surface of each light-emitting element 21. In addition, the plurality of light-emitting elements 21 of the light source 20 are configured to be rotationally symmetrical with the axis 36 as the center.

[0031] It should be noted that there is no particular limitation on the arrangement of the plurality of units 33, the position and range of the super surface area. Figure 3 The shape of the unit 33 shown is roughly quadrilateral, but there is no particular limitation. In addition, the size and shape of the plurality of units 33 may be different from each other. In addition, there is no particular limitation on the size of the super lens 30 and the super surface area, and there is no particular limitation on the shape of the super lens 30. In addition, unlike the above description, at least a portion of the super surface area may be provided on the exit surface 32s. In addition, Figure 3 In the embodiment, the units 33 are arranged in a matrix, but the units 33 may also be arranged in a radial pattern.

[0032] In the present embodiment, the shape of the nanostructure 35 is cylindrical, and the diameter is smaller than the longest wavelength of the light L emitted from the light source 20. It should be noted that the width of the nanostructure 35 is smaller than the longest wavelength of the light L emitted from the light source 20, and the shape of the nanostructure 35 is not particularly limited. For example, the shape of the nanostructure 35 may also be a prism or a wedge. In addition, the nanostructure 35 may also be composed of a pair of quadrangular prisms arranged at a predetermined interval. In addition, the shape of the nanostructure 35 in each unit 33 may also be different. As materials constituting the superlens 30, for example, glass, resin, etc. may be cited. It should be noted that the materials constituting the nanostructure 35 and the parts other than the nanostructure 35 may be the same or different.

[0033] Figure 4Schematically shows a cross-sectional view of the metalens 30 in this embodiment. Figure 4 As shown, in the super lens 30 of this embodiment, the amount of change in the structure of the nanostructure 35 increases from the center side of the super surface area toward the outer peripheral side. Figure 4 In the figure, an example is shown in which the variation of the height of the nanostructure 35 increases from the center side of the supersurface region toward the peripheral side. In addition, as other examples in which the variation of the structure of the nanostructure 35 increases from the center side of the supersurface region toward the peripheral side, an example in which the variation of the width of the nanostructure 35 increases from the center side of the supersurface region toward the peripheral side or the variation of the shape of the nanostructure 35 increases from the center side of the supersurface region toward the peripheral side can be cited.

[0034] The unit 33 including such a nanostructure 35 can modulate the phase of the light L passing through the unit 33. Moreover, by adjusting the configuration of the plurality of units 33, the size and shape of the nanostructure 35 in each unit 33, etc., the divergence angle of the light L passing through the super lens 30 can be reduced. In addition, in the present embodiment, when the light source 20 is observed from the projection lens 50 side through the super surface area of ​​the super lens 30, as shown in FIG. Figure 1 As shown by the middle dotted line, the image 20' of the light source 20 appears to be the same size as the actual size of the light source 20 at a position farther than the actual position of the light source 20. In order to reduce the divergence angle as described above and to be able to see the image 20' as described above, the configuration of the plurality of units 33, the size and shape of the nanostructures 35 in each unit 33, etc. are adjusted. That is, in the present embodiment, the nanostructures 35 in the metasurface region are configured so that there is substantially no change in the radial direction of the central coordinates of the spherical waves of each light incident from each light-emitting point in each light-emitting element 21 of the light source 20, and the spherical waves have a phase modulation amount that is delayed in the direction of the optical axis of the light L from the light source 20. The radial coordinate in this case is a direction along the in-plane direction of the exit surface of each light-emitting element 21, and is a direction perpendicular to the direction of the optical axis of the light L from the light source 20.

[0035] Figure 5 2 is a diagram for explaining the condition that the image 20' of the light source 20 appears to be the same size as the light source 20. Figure 5 As shown, the distance between the light source 20 and the super lens 30 along the axis 36 is set to z 0 , the distance between the incident surface 31s of the super lens 30 and the image 20' is set to z. The axis 36 coincides with the optical axis of the light emitted from the light source 20. When the light emitted from the light source 20 at a distance y from the optical axis enters the super lens 30 from a position at a distance r from the optical axis on the incident surface 31s of the super lens 30, the phase distribution Φ of the light source It is represented by the following formula (1).

[0036]

[0037] The above formula is related to the spherical wave centered at a position y from the optical axis in the light source 20 reaching a position z from the optical axis. 0 The phase delay amount is equal to that of the flat plate. The light transmitted through the super lens 30 appears to be emitted from the image 20', and it can be considered that the phase distribution of the light after passing through the super lens 30 becomes the phase distribution of the spherical wave emitted from the position y from the optical axis in the image 20'. In addition, before and after the spherical wave is changed by the super lens 30, the center position of the light source 20 and the center position of the image 20' are equal to each other, and the position y from the optical axis in the light source 20 and the position y from the optical axis in the image 20' must be the same. Therefore, the phase distribution Φ emitted from the super lens 30 out As shown in the following formula (2).

[0038]

[0039] Phase modulation amount Φ in the superlens 30 lens The phase distribution difference between the light incident on the super lens 30 and the light emitted can be obtained by lens =Φ out -Φ source In addition, if the incident angle of light emitted from the light source 20 at a distance y from the optical axis to the super lens 30 at a distance r from the optical axis is θ, the distance y is given by y=r-z 0 ×tanθ.

[0040] Therefore, the phase modulation amount Φ lens As shown in the following formula (3).

[0041]

[0042] Therefore, the nanostructure 35 is configured to realize the phase distribution. As described above, the amount of change in the structure of the nanostructure 35 increases from the center side toward the outer periphery side of the super surface area, and thus the super lens 30 having such characteristics can be easily designed.

[0043] The projection lens 50 is a lens having an incident surface 51 into which the light L emitted from the super lens 30 is incident and an emission surface 52 from which the light L incident from the incident surface 51 is emitted. The projection lens 50 reduces the divergence angle of the light L incident from the super lens 30 and emits it.

[0044] In the vehicle headlamp 1 of the above structure, when the light L is emitted from the light emitting element 21 selected from the light source 20, the light L is emitted at a predetermined divergence angle. The light L is incident on the super surface area of ​​the incident surface 31s of the super lens 30, and is emitted from the exit surface 32s. At this time, the divergence angle of the light L is smaller than the divergence angle of the light L emitted from the light source 20. The light L with a smaller divergence angle passes through the projection lens 50 and the divergence angle is further reduced, and is emitted from the front cover 12. In such an action, by appropriately selecting the light emitting element 21 of the light source 20, it is possible to switch between high beam and low beam, or emit light L that becomes ADB (Adaptive Driving Beam).

[0045] As described above, in the vehicle headlamp 1 of the present embodiment, the metalens 30 reduces the divergence angle of the light L incident from the light source 20 into the metasurface region of the metalens 30 and emits it. In addition, when the light source 20 is observed from the projection lens 50 side through the metasurface region, the image 20' of the light source 20 appears to be equal in size to the light source 20 at a position farther than the position of the light source 20. In this way, in the vehicle headlamp 1 of the present embodiment, the divergence angle of the light L from the light source 20 is reduced by the metalens 30 used as the main lens, so that the light L can be efficiently incident on the projection lens 50 and the light L can be efficiently emitted. In addition, in the vehicle headlamp 1 of the present embodiment, as described above, when the light source 20 is observed from the projection lens 50 side through the metasurface region, the image 20' of the light source 20 appears to be equal in size to the light source 20 at a position farther than the position of the light source 20. Therefore, compared with the case of using a convex lens as the main lens, the size of the projection lens 50 is smaller. Even if the projection lens 50 is positioned close to the light source 20, the light distribution pattern of the light L emitted from the projection lens 50 can be prevented from becoming larger, thereby preventing a reduction in the resolution and brightness of the light L.

[0046] It should be noted that in this embodiment, when the light source 20 is observed from the projection lens 50 side through the metasurface region, the image 20' of the light source 20 at a position farther than the light source 20 appears to be of the same size as the light source 20. However, the present invention is not limited thereto.

[0047] Figure 6 FIG. 2 is a diagram showing a modified example of the vehicle headlamp 1 in the above-mentioned embodiment. Figure 6 In FIG. 5 , a dotted line indicates a hypothetical state in which a convex lens 30″ is configured instead of the super lens 30. The convex lens 30″ emits the light L incident from the light source 20 at the same divergence angle as the divergence angle of the light L emitted from the super lens 30. In this case, when the light source 20 is observed from the projection lens 50 side through the convex lens 30″, as shown in FIG. Figure 6As shown by the dotted line, the image 20" of the light source 20 appears larger than the actual size of the light source 20 at a position farther than the actual position of the light source 20. When the light source 20 is observed from the projection lens 50 side through the super surface area of ​​the super lens 30, the vehicle headlamp 1 of this modified example is Figure 6 As shown by the middle dotted line, the image 20' of the light source 20 is different from the above-mentioned embodiment in that it appears larger than the actual size of the light source 20 and smaller than the image 20" at a position farther than the actual position of the light source 20. That is, in this modification, the nanostructure 35 in the metasurface region is configured so that the radial change of the center coordinates of the spherical wave of each light incident from each light-emitting point in each light-emitting element 21 of the light source 20 is more suppressed than the radial change of the center coordinates of the spherical wave of each light in the case where a convex lens 30" is configured instead of the superlens 30, and the spherical wave has a phase modulation amount that is delayed in the optical axis direction of the light L from the light source 20. In addition, although not specifically shown in the figure, in a modification different from the present modification, when the light source 20 is observed from the projection lens 50 side through the metasurface region, the image 20' of the light source 20 may appear smaller than the size of the light source 20 at a position farther than the position of the light source 20.

[0048] As described above, when the size of the image 20 ′ of the light source 20 appears to be different from the size of the light source 20 , the following can be considered.

[0049] The ratio of the size of the light source 20 to the size of the image 20' is set to β. For example, if the size of the image 20' is twice the size of the light source 20, β is 2. In this case, if the position of the light source 20 at a distance y from the optical axis is at position y' in the image 20', y'=βy. Therefore, in this case, equation (2) can be rewritten by the following equation (4).

[0050]

[0051] Therefore, in this case, the formula (3) can be rewritten by the following formula (5).

[0052]

[0053] like Figure 6 As shown, when a convex lens 30" is configured instead of the super lens 30, the magnification is z / z 0 Therefore, the range of β is 0≤β<z / z 0 It should be noted that, when β=1, as in the above embodiment, the size of the image 20' is the same as the size of the light source 20, and when β=0, the image 20' is a point. Therefore, the nanostructure 35 is configured to achieve a phase distribution that satisfies equation (5) within the above range of β.

[0054] That is, in the vehicle headlamp of the present invention, the super lens 30 makes the divergence angle of the light L incident from the light source 20 into the super surface area smaller and emits it, and when the light source 20 is observed from the projection lens 50 side through the super surface area, the image 20' of the light source 20 appears to be located at a position farther than the position of the light source 20, and is smaller than the image 20" of the light source 20 seen when a convex lens 30" is arranged instead of the super lens 30, and the above light source is observed from the projection lens 50 side through the convex lens 30" in the following manner, wherein the light L from the light source 20 is emitted at the same divergence angle as the light L emitted from the super lens 30. The super lens 30 is configured in this way. With such a structure, the size of the projection lens 50 is smaller than that of the case where a convex lens is used as the main lens, and even if the position of the projection lens 50 is close to the light source 20, it is possible to suppress the light distribution pattern of the light L emitted from the projection lens 50 from becoming larger, and it is possible to suppress the reduction in resolution and brightness of the light L.

[0055] In addition, in the vehicle headlamp 1 of the above-mentioned embodiment, the change amount of the size of the nanostructure 35 increases from the center side of the metasurface region toward the peripheral side. Therefore, the metasurface region can be easily designed so that the divergence angle of the light L is reduced and emitted as described above, and the image 20' of the light source 20 when the light source 20 is observed from the projection lens 50 side through the metasurface region appears smaller than the image 20" at a position farther than the position of the light source 20.

[0056] In addition, in the vehicle headlamp 1 of the above embodiment, an outer frame 10 and an inner frame 40 are provided, wherein the outer frame 10 surrounds the light source 20, the super lens 30, and the projection lens 50, and the inner frame 40 surrounds the light source 20, and the super lens 30 is a part of the inner frame 40. In this case, the light source 20, the super lens 30, and the projection lens 50 inside are protected by the outer frame 10, and the light source 20 is protected from dust and the like by the inner frame 40. In addition, by making the super lens 30 a part of the inner frame 40, the size of the inner frame 40 can be miniaturized compared to the case where the super lens 30 is located inside the inner frame 40, which can contribute to the miniaturization of the vehicle headlamp 1. In addition, in the vehicle headlamp 1 of the above embodiment, the nanostructure 35 is formed on the inner space S2 side of the inner frame 40, so that dust can be suppressed from adhering to the nanostructure 35. Such a structure can also be applied to the above-mentioned modified example.

[0057] As mentioned above, although the present invention has been described by taking the above-mentioned embodiment as an example, the present invention is not limited thereto.

[0058] For example, in the above embodiment, the vehicle headlamp 1 is a headlamp, but there is no particular limitation. In the above embodiment, the example in which the amount of change in the structure of the nanostructure 35 increases from the center side of the super surface area toward the peripheral side is described, but as long as the image 20' of the light source 20 can be seen as described above, the nanostructure 35 may also be of other designs.

[0059] In addition, the inner case 41 of the inner frame 40 is not essential.

[0060] In the above embodiment, the substantially flat-plate-shaped superlens 30 is exemplified and described, but the superlens 30 is not limited to the plate shape, and the incident surface 31s and the emission surface 32s may be curved surfaces.

[0061] According to the present invention, there is provided a vehicle headlamp capable of efficiently emitting light L while suppressing enlargement, and the headlamp can be used in the field of vehicle headlamps such as automobiles.

Claims

1. A vehicle headlamp, characterized in that: have: light source; A superlens having a supersurface region in which a plurality of nanostructures having a width smaller than the longest wavelength of light emitted from the light source are arranged, and through which the light emitted from the light source is transmitted; a projection lens through which the light emitted from the super lens is transmitted, The super lens reduces the divergence angle of light incident from the light source to the super surface area and emits the light. When the light source is observed from the projection lens side through the metasurface area, the image of the light source appears to be at a position farther than the position of the light source and appears smaller than the image of the light source seen when a convex lens is configured instead of the meta lens in a manner that emits light from the light source at the same divergence angle as the light emitted from the meta lens and the light source is observed from the projection lens side through the convex lens.

2. The vehicle headlamp according to claim 1, characterized in that: When the light source is observed from the projection lens side through the metasurface region, the image of the light source appears to be equal in size to the light source at a position farther than the position of the light source.

3. The vehicle headlamp according to claim 1 or 2, characterized in that: The amount of change in the structure of the nanostructure increases from the center side of the super surface area toward the outer peripheral side.

4. The vehicle headlamp according to claim 1 or 2, characterized in that: The invention comprises: an outer frame which surrounds the light source, the metalens and the projection lens; and an inner frame which surrounds the light source. The metalens is part of the inner frame.

5. The vehicle headlamp according to claim 4, characterized in that: The nanostructure is formed on the inner space side of the inner frame.

Images