Ultra-narrow lens module and vehicle lamp

Abstract

An ultra-narrow lens module and a headlight, comprising a reflector and a lens group, wherein the lens group comprises a first lens and a second lens, the reflector has a reflection focus, so that when the light source is set at the reflection focus of the reflector, the light of the light source is reflected by the reflector to form parallel light, the focusing point of the lens group focusing the parallel light together on the horizontal cross section is the smallest distance from the light source, and the focusing point of the lens group focusing the parallel light together on the vertical cross section is the largest distance from the light source, so that the parallel light can be focused by the first lens and the second lens to form a light spot with a horizontal width greater than a vertical height. The light focused by the central optical axis can expand the irradiation range, that is, it can further reduce the size in the vertical direction and have a larger irradiation range, and can also improve the visual effect of the headlight, and the ultra-narrow headlight not only conforms to the trend of contemporary public aesthetics but also can reduce the weight of the headlight and reduce the production cost of the headlight.

Description

Technical Field

[0001] The invention belongs to the field of vehicle lamps, and in particular relates to an ultra-narrow lens module and a vehicle lamp. Background Art

[0002] With the continuous development of optical technology, lens groups, as an important component of optical systems, have been widely used in various fields. However, in the field of automotive lighting, traditional lens groups often have problems such as large size, heavy weight, and low production efficiency, which makes it difficult to meet the requirements of modern optical equipment for high performance, miniaturization, and lightweight.

[0003] The traditional lens group of the headlight is usually composed of multiple lenses. The distance between the lenses and the focal length of the lenses are adjusted to achieve the convergence and divergence of light, thereby forming the light spot required for lighting. The formation of the light spot needs to consider the color of the light, the horizontal and / or vertical extension or contour of the light distribution, the maximum illuminance value, the position of the maximum illuminance within the light distribution, the light distribution at the light-dark boundary, the existence, design, route and / or position or any other feature of the iso-illuminance line route. However, this solution often requires the use of thicker lenses, resulting in a large lens group, heavy weight, and low production efficiency.

[0004] The most common problem of current headlight modules is the dispersion of light at the light-emitting surface of the lens, which is mainly reflected in the separated yellow light and blue light on the light spot. In theory, the superposition of the separated yellow light and blue light from adjacent light spots will re-form pure white light, but in reality, technicians have found that the brightness of the light spot, that is, the light density, tends to decrease along the direction of separation of the yellow light and the blue light. Therefore, the intensity of the superimposed yellow light is greater than the intensity of the blue light, resulting in the overall yellowing of the light spot intensity.

[0005] The problems that yellowish light spots bring to driving include: yellowish light may reduce the driver's visual effect. When driving at night, the yellow light will cause a strong contrast with the white light in the driver's eye perception, thereby weakening the driver's ability to recognize roads and obstacles; the contrast is reduced. The yellowish light may reduce the contrast on the road, making it more difficult to notice obstacles, vehicles, pedestrians, etc., thereby causing traffic accidents.

[0006] The Chinese patent application number is "CN202310187589.X" and the patent name is "Optical lens module and car light". The patent discloses an optical lens module, including a first lens, a lens group and a curved total reflection lens, wherein the lens group includes a second lens and a third lens, the second lens is integrally formed with the first lens, the third lens is arranged on one side of the second lens, the real focus of the lens group is located outside the second lens, the side of the first lens facing away from the third lens includes a light incident surface and an inclined surface connected to each other, the curved total reflection lens is arranged below the inclined surface, and the side of the curved total reflection lens facing away from the inclined surface is convex. The light emitted by the external light source of the present application can enter from the light incident surface, be reflected by the curved total reflection lens, and after being reflected by the inclined surface, the lens group can project the light after the inclined surface reflection as parallel light, that is, the light after the inclined surface reflection can be projected as parallel light by the lens group. The light path of the present application is folded, which shortens the module length, and the final light type of the optical (low beam) lens module provided by the present application is the image of the light beam reflected by the curved total reflection lens, and the edge of the curved total reflection lens is the boundary line that forms the cutoff line of the low beam light type. For the traditional lens structure, the present application can form a good cutoff line color, which is close to dispersion-free.

[0007] The Chinese patent application number is "CN202310187410.0" and the patent name is "Optical Lens and Car Light". The optical lens includes a first lens, a lens group and a curved total reflection lens, wherein the lens group includes a second lens and a third lens, the second lens is integrally formed with the first lens, the third lens is arranged on one side of the second lens, and the real focus of the lens group is located in the second lens. The side of the first lens of this application facing away from the third lens includes a light incident surface and a first inclined surface connected to each other, the curved total reflection lens is arranged below the first inclined surface, and the side of the curved total reflection lens facing away from the first inclined surface is convex. The light emitted by the external light source can enter from the light incident surface, be reflected by the curved total reflection lens, and then be reflected by the first inclined surface to converge to the real focus, and then the lens group projects the light passing through the real focus as parallel light, that is, the real focus of the lens group is located at the convergence point of the reflected light of the curved total reflection lens. The optical path folding of the present application shortens the length of the module, and the final light pattern of the optical lens (high beam) provided by the present application is the imaging of the light beam at the real focus of the lens group, and thus the brightness, color and uniformity of the high beam light pattern projected by the optical lens of the present application are all good.

[0008] That is to say, the existing technology solves the problem of partial yellowing of the light pattern and poor light perception by folding the light path and shortening the length of the module. However, the high and low beam light patterns are parallel light. If the module is used in ultra-narrow headlights, the maximum light intensity at the center point is not strong enough, and the width is also relatively narrow, that is, the distance of the high and low beam light patterns is not far enough, and the light intensity on both sides of the road is not enough, so there is room for improvement. Summary of the invention

[0009] In view of the above-mentioned prior art, an object of the present invention is to provide a more practical ultra-narrow lens module and a vehicle lamp.

[0010] The technical solution of the present invention is implemented as follows: an ultra-narrow lens module includes a reflector and a lens group, the lens group includes a first lens and a second lens, the reflector has a reflection focus so that when the light source is set at the reflection focus of the reflector, the light of the light source is reflected by the reflector to form parallel light, the focus point that focuses the parallel light together on the horizontal cross section of the lens group is at the smallest distance from the light source, and the focus point that focuses the parallel light together on the vertical cross section of the lens group is at the largest distance from the light source, so that the parallel light can be focused through the first lens and the second lens to form a light spot with a horizontal width greater than a vertical height.

[0011] The beneficial effects of such a design are: the lens group composed of the first lens and the second lens is thinner and lighter than a single lens, the reflector generates a large amount of parallel light or nearly parallel light in the horizontal and vertical directions, and the parallel light is refracted by the lens group composed of the first lens and the second lens to form focused light in the horizontal and vertical directions. Compared with parallel light, the focused light can effectively improve the problem of yellowing of the edge of the light spot, and the focused light can expand the irradiation range, especially for ultra-narrow lenses, which can further reduce the vertical size and have a larger irradiation range, and can also improve the visual effect of the headlights, which can be said to kill two birds with one stone. The ultra-narrow headlights not only conform to the trend of contemporary popular aesthetics, but also can reduce the weight of the headlights, reduce the production cost of the headlights, and are lighter and thinner, and have higher production efficiency.

[0012] Furthermore, a central optical axis perpendicular to the lens group is provided at the center of the lens group, the first lens has a focus at least in a section passing through or parallel to the central optical axis, the first lens is located between the second lens and the reflector, the second lens has a focus at least in a section passing through or parallel to the central optical axis, the reflector is provided with a starting point and the starting point is located at the central optical axis of the first lens and the second lens, and the focusing points of the lens group in the vertical direction are all located at the starting point or near the starting point of the reflector, so that the non-parallel light reflected by the reflector can be evenly irradiated, which can effectively solve the problem that the brightness of the light spot, that is, the light density, tends to decrease along the direction of separation of yellow light and blue light, and improve the yellowing effect of the light spot.

[0013] Furthermore, the first lens and the second lens are both cylindrical lenses, the first lens has a first focal line and the second lens has a second focal line, the first focal line and the second focal line are not parallel and both pass through the starting point or near the starting point of the reflector, the cylindrical lens has a lower processing cost, the light intensity at the starting point of the reflector is higher, and the non-parallel light at this position can be used to effectively improve the effect of yellowing of the light spot. If the reflector is too close to the first lens and the second lens, the light will be very scattered. Using the reversible principle of light, the light diverging at the first focal line and the second focal line can pass through the first lens and the second lens to form a more uniform and concentrated light, which can increase the brightness of the central area of ​​the light spot and improve the effect of yellowing of the light spot.

[0014] Furthermore, the first lens and the second lens are both provided with a plane side and a curved side, the plane side being closer to the light source than the curved side, and parallel light rays vertically incident on the first lens and the second lens can reduce the path of the light rays refracted by the first lens and the second lens, thereby reducing the visual effect of yellow light spots caused by refraction.

[0015] Furthermore, the first focal line of the first lens is located in the vertical direction, the second focal line of the second lens is located in the horizontal direction, and the distance between the first focal line and the first principal plane of the first lens is smaller than the distance between the second focal line and the second principal plane of the second lens. Thus, the width of the light spot formed is wider and can illuminate more areas. When designing different light spots, the focal length of the first lens or the second lens can be directly adjusted, that is, different light spots can be formed by using different lens combinations as needed.

[0016] Furthermore, the first lens and the second lens use the same cylindrical lens, the first principal plane of the first lens is parallel to the second principal plane of the second lens, the first focal line of the first lens and the second focal line of the second lens form an acute angle, and the first lens and the second lens use the same structure to reduce the development cost and production cost of the cylindrical lens. By changing the angle between the first focal line of the first lens and the second focal line of the second lens, different focal length changes within a certain range can be achieved, which can meet the needs of different light spots.

[0017] Furthermore, the first focal line of the first lens is perpendicular to the second focal line of the second lens, and the first principal plane of the first lens forms a certain angle with the second principal plane of the second lens. Such a design can achieve a change in focal length in the horizontal direction or the vertical direction by changing the angle of the first principal plane of the first lens or the second principal plane of the second lens, that is, the focal length can be reduced for the same thickness, and the thickness can be reduced for the same focal length, which can reduce the production cost.

[0018] Furthermore, the first principal plane of the first lens is inclined at a certain angle relative to the horizontal plane, and the reflector is provided with an end face inclined downward with the same inclination angle as the first lens, so that the first lens can close the opening of the reflector so that the light of the reflector basically needs to pass through the first lens before being emitted forward. Since the first lens is inclined, part of the light will be reflected to the reflector after reaching the first lens, and most of the light reflected by the reflector is basically parallel. Therefore, the light reflected by the first lens is basically parallel, and the parallel light is reflected and formed into focused light after reaching the reflector. This part of the focused light will be emitted downward at an angle, and will be scattered on the nearby ground through the action of the second lens. In particular, if an electric bicycle uses the ultra-narrow lens module, it can make the area near the vehicle brighter when parking. The speed of the electric bicycle is slower, and illuminating the bottom surface near the headlights can also make the rider feel safer in areas without street lights on a dark night, and provide a better user experience.

[0019] Furthermore, the reflector is provided with a reflection zone and a scattering zone. The reflection zone is closer to the starting point of the reflector than the scattering zone. A third zone reflector is provided below the first lens and behind the second lens. This can make the light more dispersed and reduce the yellowing problem of light caused by refraction. The light near the headlights is also increased accordingly. The third zone reflector can make full use of light with a larger inclination angle.

[0020] A vehicle lamp comprises the above-mentioned ultra-narrow lens module and a light source, wherein the light source is located at a reflection focus position. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a three-dimensional schematic diagram of an ultra-narrow lens module of the present invention;

[0022] Figure 2 This is a schematic diagram of the vertical optical path of Example 1 of the present invention;

[0023] Figure 3 This is a schematic diagram of the horizontal optical path of Example 1 of the present invention;

[0024] Figure 4 This is a schematic diagram of the horizontal optical path of Embodiment 2 of the present invention;

[0025] Figure 5 This is a schematic diagram of the vertical optical path of Example 3 of the present invention;

[0026] Figure 6 This is a schematic diagram of the horizontal optical path of Embodiment 3 of the present invention;

[0027] Figure 7 This is a schematic diagram of the vertical optical path of Example 4 of the present invention;

[0028] Figure 8 This is a schematic diagram of the horizontal optical path of Example 4 of the present invention;

[0029] Fig. 9 Schematic diagram of the relative positions of the first lens and the second lens in Example 5 of the present invention;

[0030] Fig.10 This is a front view schematic diagram of the first lens and the second lens of Example 5 of the present invention;

[0031] Fig.11 for Fig.10 Schematic diagram of the cross-section at the AA position;

[0032] Fig.12 for Fig.10 Schematic diagram of the cross-section of the middle BB position;

[0033] Fig.13 This is a schematic diagram of the rotation structure of the first lens and the second lens in Embodiment 5 of the invention;

[0034] Fig.14 This is a three-dimensional schematic diagram of Embodiment 6 of the present invention;

[0035] Fig.15 This is a schematic diagram of the main light path in the vertical direction of Example 6 of the present invention;

[0036] Fig.16 This is a schematic diagram of the main light path after being reflected by the first lens in the vertical direction of Example 6 of the present invention;

[0037] Fig.17 This is a schematic diagram of the approximate optical path after the scattering region and the third region reflector are arranged in the vertical direction in Example 6 of the present invention;

[0038] Fig.18 This is a schematic diagram of the vertically optimized optical path of Example 6 of the present invention;

[0039] Fig.19 Schematic diagram of the light spot formed by the present invention.

[0040] In the figure: 1, reflector; 2, first lens; 3, second lens; 4, light source; 5, gear; 7, reflection area; 8, scattering area; 9, third area reflector; 23, central optical axis; 24, starting point. DETAILED DESCRIPTION

[0041] As required, detailed embodiments of the present invention are disclosed herein, but it should be understood that the disclosed embodiments are only exemplary of the present invention, and the present invention can be implemented in different and alternative forms. The accompanying drawings are not drawn to scale. In order to ensure the clarity of the optical path, the lens was originally designed to be smaller in the vertical direction and therefore needs to be properly stretched. The focal length in the horizontal direction is also drawn to actual scale, mainly to make the optical path more obvious, the actual optical path is flatter, and the light spot is also flat. Therefore, the specific structural and functional details disclosed herein should not be understood as having a restrictive meaning, but only as a representative basis to teach those skilled in the art to adopt the present invention differently. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0042] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, an ultra-narrow lens module includes a reflector 1 and a lens group, the lens group includes a first lens 2 and a second lens 3, the reflector 1 has a reflection focus so that when a light source 4 is set at the reflection focus of the reflector 1, the light of the light source 4 is reflected by the reflector 1 to form parallel light, a central optical axis 23 perpendicular to the lens group is provided at the center of the lens group, the first lens 2 and the second lens 3 are provided with the same central optical axis 23, and light on the central optical axis 23 can be emitted along a straight line or in a direction parallel to the straight line.

[0043] like Figure 2 and Figure 3 As shown, the light of the central optical axis 23 does not refract. The first lens 2 has a focus at least in a cross section passing through or parallel to the central optical axis 23. If it is a cylindrical lens, such as Figure 3 As shown, the focal length of the first lens 2 at the horizontal position cross-sectional focus is the smallest, and the focal length of the second lens 3 at the horizontal position cross-sectional focus is the largest, that is, at infinity, as shown in FIG. Figure 2 As shown, the focal length of the focus of the first lens 2 in the vertical position section is at infinity at the maximum, and the focal length of the focus of the second lens 3 in the vertical position section is at the minimum. For the focal length of the lens group, the focal length of the horizontal position section is equal to the focal length of the horizontal section of the first lens 2, and the focal length of the vertical position section is equal to the focal length of the vertical section of the second lens 3. The first lens 2 is located between the second lens 3 and the reflector 1, and the second lens 3 has a focus in at least one section passing through or parallel to the central optical axis 23. The section where the focus of the minimum focal length of the first lens 2 is located is not parallel to the section where the focus of the minimum focal length of the second lens 3 is located. In this way, the shape of the light spot can be adjusted as needed. If they are parallel to each other and are both cylindrical lenses, focusing cannot be completed in one direction, and setting two lenses cannot change the focusing state of the light.

[0044] like Figure 2 and Figure 3 As shown, the focus of the minimum focal length is on the horizontal cross section, and the focus of the maximum focal length is on the vertical cross section. The two cross sections are perpendicular to each other. If the two cross sections are the same and parallel, the value of the combination is lost, and the change of focusing in different directions will not change each other. It only doubles the light spot and does not change the ratio of the height and width of the light spot. The first lens 2 and the second lens 3 are combined to form a lens group with the smallest distance from the focus point that focuses the parallel light together on the horizontal cross section and the light source 4. The distance is equal to the sum of the focal length of the horizontal cross section and the distance from the lens group to the light source 4, which is exactly equal to the first lens in Example 1. The sum of the focal length of the horizontal cross section of the lens 2 and the distance from the lens group to the light source, that is, the first lens 2 is better to be set closer to the light source 4, and the focal point of the lens group formed by the combination of the first lens 2 and the second lens 3 in the vertical direction of the cross section that focuses the parallel light together is the longest distance from the light source 4, which is the sum of the focal length of the vertical cross section of the second lens 3 and the distance from the lens group to the light source. On the one hand, the second lens 3 needs to be set with a larger focal length, and on the other hand, it needs to be farther away from the light source 4. Of course, the focal length is the main thing, and the setting position is secondary. A large focal length can change the angle of the light, and the distance of the position change is limited. Parallel light is focused by the first lens 2 and the second lens 3 to form a light spot with a horizontal width greater than the vertical height. In embodiment 1, for the light source 4 or reflected light with the same length and width, it is only necessary to satisfy that the focal length of the second lens 3 is greater than the focal length of the first lens 2 to achieve focusing to form a light spot with a horizontal width greater than the vertical height. In other embodiments, combined calculations need to be performed, and the width of the light spot can be adjusted as needed in some embodiments. The reflector 1 can be a spherical surface or a surface generated by other quadratic curves that can focus parallel light, such as a surface formed by the rotation of a parabola. The light source is as small as possible, so that it is easier to reflect more parallel light. This design can make the lens narrower and have a better spot effect.

[0045] Embodiment 1:

[0046] like Figure 1 , Figure 2 and Figure 3As shown, the reflector 1 is provided with a starting point 24 and the starting point 24 is located at the central optical axis 23 of the first lens 2 and the second lens 3. The focusing points of the lens group in the horizontal direction and the vertical direction are both located at the starting point 24 of the reflector 1 or near the starting point 24. The intensity of the reflected light near the starting point 24 of the reflector 1 is the highest. Since the light source 4 has a certain volume, in fact, the light reflected by the reflector 1 from the light source 4 cannot all be parallel light. For this part of non-parallel light, if it is very close to the first lens 2 and the second lens 3, it will be scattered and the light density is very small. If it is emitted from the vicinity of the focusing point, the formed light will be gathered in a smaller area, so that the light density will be much higher. The reflector 1 is located on the upper side of the central optical axis 23 of the first lens 2 and the second lens 3. The parallel light reflected by the reflector 1 is refracted by the first lens 2 and the second lens 3 to form a light spot located below the central optical axis 23. The light shape refracted onto the road surface is essentially the parallel light reflected by the reflector 1 by the lens group composed of the first lens 2 and the second lens 3, which is focused by the lens group into convergent light with a focal point and irradiated to the front of the vehicle, and forms an inverted and enlarged light spot. The reflector 1 is completely on the upper side of the central optical axis 23. Therefore, the parallel light reflected by the reflector 1 forms multiple groups of light with different focusing focal lengths after passing through the lens group. After exceeding a certain distance, all the light reaches the lower side of the central optical axis 23, and an obvious difference in light intensity is formed between the upper and lower sides of the central optical axis 23, that is, a cut-off line is formed, and no additional light baffle is required.

[0047] like Figure 2 and Figure 3 As shown, the light irradiation direction is defined as forward irradiation, that is, the reflector 1 is located at the rear relative to other components, the light source 4 is located in front of the reflector 1 relative to the reflector 1, the first lens 2 and the second lens 3 are located in front of the light source 4 relative to the light source 4, the second lens 3 is located in front of the first lens 2 relative to the first lens 2, the first lens 2 and the second lens 3 are both cylindrical lenses, the first lens 2 has a first focal line at the rear side and the second lens 3 has a second focal line at the rear side, the first focal line and the second focal line are not parallel and both pass through the starting point 24 of the reflector 1 or near the starting point 24. In order to increase the brightness of the central area in the horizontal direction, the second focal line can pass through the light source 4, so that the light rays diverging from the light source 4 in the horizontal direction can be converged into parallel light, which can increase the brightness of the center position of the light spot.

[0048] like Figure 2 and Fig.19As shown, from the vertical direction, the light emitted by the light source 4 is reflected by the reflector 1 to form a large number of parallel light rays that propagate to the light incident surface of the first lens 2. The first lens 2 has no focusing effect in the vertical direction. If the light enters the first lens 2 vertically, it will directly exit the first lens 2 vertically. The second lens 3 has a focusing effect in the vertical direction and can converge the parallel light rays into non-parallel focused light rays. Since the reflector 1 is completely on the upper side of the central optical axis 23, the parallel light rays will all be irradiated below the central optical axis 23 after focusing, so that the light spot is in an inverted state relative to the reflector 1 and has a cutoff line. The second focal line is located at the starting point 24 of the reflector 1. The density of reflected light rays near the starting point 24 is the largest. The parallel light rays near the starting point 24 can be refracted by the second lens 3 into focused light rays and then exit from the second lens 3. In this way, the light in the center area of ​​the light spot is more concentrated than that in the edge area, forming the brightest part in the center area of ​​the light spot.

[0049] like Figure 3 and Fig.19 As shown, from the horizontal direction, the light emitted by the light source 4 is reflected by the reflector 1 to form a large number of parallel light rays that propagate to the light incident surface of the first lens 2. The first lens 2 has a focusing effect in the horizontal direction and can converge the parallel light rays into non-parallel focused light rays, while the second lens 3 has no focusing effect in the horizontal direction. Therefore, the light focused in the horizontal direction continues to propagate in a direction parallel to the original direction after slight refraction by the second lens 3, that is, the second lens 3 basically does not affect the light spot formed by the light propagation. If the first focal line is located at the starting point 24 of the reflector 1, the density of the reflected light near the starting point 24 is the largest, the divergent light near the starting point 24 can be refracted by the first lens 2 into parallel light rays and emitted from the first lens 2, and the parallel light near the starting point 24 can be refracted by the first lens 2 into focused light rays and emitted from the first lens 2. In this way, the light in the center area of ​​the light spot is more concentrated than that in the edge area, forming the brightest part in the center area of ​​the light spot; if the light source 4 is located at the first focal line position, the light directly divergently emitted by the light source 4 to irradiate the first lens 2 will be refracted into parallel light rays, and the center area of ​​the light spot will be brighter.

[0050] like Figure 2 and Figure 3 As shown, the first lens 2 and the second lens 3 are both provided with a plane side and a curved side, and the plane side is closer to the light source 4 than the curved side.

[0051] like Figure 2 and Figure 3As shown, the first focal line of the first lens 2 is located in the vertical direction, the second focal line of the second lens 3 is located in the horizontal direction, and the distance between the first focal line and the first principal plane of the first lens 2 is smaller than the distance between the second focal line and the second principal plane of the second lens 3. From the production efficiency point of view, it takes 8-10 minutes to produce a lens with a thickness of 15 mm, while it only takes 1 minute to produce a lens with a thickness of 3 mm, which greatly improves the production efficiency and saves materials. The thickness of the second lens 3 and the first lens 2 in the embodiment is less than 3 mm, which greatly improves the production efficiency and reduces the production cost compared with the lens with a thickness of 15 mm in the prior art.

[0052] Embodiment 2:

[0053] like Figure 1 and Figure 4 As shown, the first lens 2 or the second lens 3 is an aspherical lens, the focal length of the first lens 2 in the vertical direction is much greater than the focal length of the horizontal direction, and the focal length of the second lens 3 in the vertical direction is much smaller than the focal length of the horizontal direction, so that the vertical direction mainly relies on the second lens 3 to form the focused light, and the horizontal direction mainly relies on the first lens 2 to form the focused light. This implementation has a high processing cost, but can form the same or similar optical path as in Example 1, and achieve a similar technical effect, that is, the effect of improving the yellowing of the light spot.

[0054] Embodiment 3:

[0055] like Figure 5 and Figure 6 As shown, this embodiment is equivalent to inserting the second lens 3 in Example 1 between the first lens 2 and the reflector 1. Due to the change in position, this embodiment makes the non-parallel light more concentrated in the horizontal direction, but slightly disperses the light in the vertical direction, and has little effect on the parallel light. The first lens 2 or the second lens 3 can adopt a cylindrical lens with the same focal length as in Example 1, and can form the same or similar optical path as in Example 1 to achieve a similar technical effect.

[0056] Embodiment 4:

[0057] like Figure 7 and Figure 8 As shown, the reflector 1 is an inner lens, that is, the light is reflected into parallel lines inside the inner lens, and the first lens 2 and the second lens 3 can adopt the same design as that of Example 1, and can form the same or similar optical path as that of Example 1 to achieve similar technical effects.

[0058] Embodiment 5:

[0059] like Fig. 9 , Fig.10 , Fig.11 and Fig.12As shown, the first lens 2 and the second lens 3 use the same cylindrical lens, the first principal plane of the first lens 2 is parallel to the second principal plane of the second lens 3, and the first focal line of the first lens 2 and the second focal line of the second lens 3 form an acute angle, so that the focal length of the horizontal section and the vertical section can be adjusted by changing the angle. For a curved mountain road, the larger the spot width, the wider the field of view. The angle between the first focal line and the second focal line and the horizontal plane can be increased to reduce the focal length of the horizontal section. For a mountain road with a large rise and fall, the angle between the first focal line and the second focal line and the horizontal plane should be reduced to reduce the focal length of the vertical section. For a conventional road, the angle between the first focal line and the second focal line and the horizontal plane is less than 30 degrees.

[0060] like Fig.13 As shown, the first lens 2 and the second lens 3 are designed to be circular, and a gear 5 structure is arranged outside the lens. The gear 5 is driven directly or indirectly by a motor, so that the width of the light spot can be adjusted according to different road conditions to obtain the best lighting effect.

[0061] Embodiment 6:

[0062] like Fig.14 , Fig.15 and Fig.16 As shown, the first focal line of the first lens 2 is perpendicular to the second focal line of the second lens 3, and the first principal plane of the first lens 2 forms a certain angle with the second principal plane of the second lens 3. The first principal plane of the first lens 2 is inclined at a certain angle relative to the horizontal plane, and the reflector 1 is provided with an end face inclined downward at the same angle as the first lens 2. In this way, the light reflected by the first lens 2 will be reflected again by the reflector 1. At this time, the reflector 1 will focus the parallel light together, and the reflector 1 is inclined downward, so most of the light is also inclined downward. If the second lens 3 is set close to the first lens 2, this part of the light will pass through the lens and diverge downward, which can increase the brightness near the headlights. Fig.16 This is a schematic diagram of the light reflected by the second time. It can be seen that the light is emitted at a roughly downward angle.

[0063] like Fig.17 and Fig.18 As shown, in an ideal state, the reflector 1 will have total reflection, but in actual conditions there will also be scattering. For driving at a faster speed, the close-range lights basically have little effect, so it is necessary to increase the density of medium and long-range lights. Because of the angle problem, the total reflection will tilt downward. Therefore, the reflector 1 can be provided with a reflection area 7 and a scattering area 8. The reflection area 7 is closer to the starting point 24 of the reflector 1 than the scattering area 8. The scattering area 8 is arranged at the position where a large amount of reflected light is irradiated by the first lens 2. These light rays are difficult to be fully utilized due to direct reflection due to the angle problem. In this way, a large amount of parallel light can be generated in the scattering area 8 and incident on the first lens 2 and the second lens 3. Fig.18As shown in the figure, the light density at medium distance is increased, and the yellowing tendency of light is improved. For light at other angles, such as Fig.17 As shown, the light from the scattering area 8 can be reflected multiple times to a more ideal long-range position or directly illuminate a closer position, thereby making full use of the light from the light source 4. Fig.17 As shown, a third zone reflector 9 is provided below the first lens 2 and behind the second lens 3, so that the light at a large angle can be fully utilized to illuminate zone III, which complies with regulatory standards.

[0064] like Fig.19 As shown, a headlight comprises the above-mentioned ultra-narrow lens module and a light source 4, wherein the light source 4 is located at the reflection focus position. The light spot formed by the headlight is flat in shape, the light density in the center area is high and can irradiate farther, and the light on both sides is more divergent and can irradiate a wider range.

Claims

1. An ultra-narrow lens module, comprising a reflector (1) and a lens group, the lens group comprising a first lens (2) and a second lens (3), the reflector (1) having a reflection focus so that when a light source (4) is arranged at the reflection focus of the reflector (1), light from the light source (4) is reflected by the reflector (1) to form parallel light, characterized in that: The center of the lens group is provided with a central optical axis (23) perpendicular to the lens group, the reflector (1) is provided with a starting point (24) and the starting point (24) is located on the central optical axis (23) of the lens group, and the focusing point of the lens group in the vertical direction is located on the starting point (24) of the reflector (1); The first principal plane of the first lens (2) is inclined at a certain angle relative to the horizontal plane, and the reflector (1) is provided with an end surface inclined downward; The reflector (1) is provided with a reflective area (7) and a scattering area (8), and the reflective area (7) is closer to the starting point (24) of the reflector (1) than the scattering area (8); The distance between the focusing point where the parallel light is focused together and the light source (4) is the shortest in the horizontal cross section of the lens group; The focal point for focusing the parallel light together in the vertical cross section of the lens group is at the greatest distance from the light source (4); Parallel light can be focused through the first lens (2) and the second lens (3) to form a light spot whose horizontal width is greater than its vertical height.

2. The ultra-narrow lens module according to claim 1, characterized in that: The first lens (2) has a focus in at least one cross section passing through or parallel to the central optical axis (23); the first lens (2) is located between the second lens (3) and the reflector (1); and the second lens (3) has a focus in at least one cross section passing through or parallel to the central optical axis (23).

3. The ultra-narrow lens module according to claim 2, characterized in that: The first lens (2) and the second lens (3) are both cylindrical lenses, the first lens (2) has a first focal line and the second lens (3) has a second focal line, the first focal line and the second focal line are not parallel and both pass through a starting point (24) of the reflector (1).

4. The ultra-narrow lens module according to claim 3, characterized in that: The first lens (2) and the second lens (3) are both provided with a plane side and a curved side, the plane side being closer to the light source (4) than the curved side.

5. The ultra-narrow lens module according to claim 4, characterized in that: The first focal line of the first lens (2) is located in the vertical direction, the second focal line of the second lens (3) is located in the horizontal direction, and the distance between the first focal line and the first principal plane of the first lens (2) is smaller than the distance between the second focal line and the second principal plane of the second lens (3).

6. The ultra-narrow lens module according to claim 4, characterized in that: The first focal line of the first lens (2) is perpendicular to the second focal line of the second lens (3), and the first principal plane of the first lens (2) forms a certain angle with the second principal plane of the second lens (3).

7. The ultra-narrow lens module according to claim 6, characterized in that: The reflector (1) is provided with an end surface inclined downwards, which has the same inclination angle as the first lens (2).

8. The ultra-narrow lens module according to claim 7, characterized in that: A third zone reflector (9) is provided below the first lens (2) and behind the second lens (3).

9. A vehicle lamp, characterized in that: It comprises the ultra-narrow lens module and a light source (4) according to any one of claims 1 to 8, wherein the light source (4) is located at a reflection focus position.

Images