CN118346938B - Ultra-narrow lens module and car lamp - Google Patents
Ultra-narrow lens module and car lamp Download PDFInfo
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- CN118346938B CN118346938B CN202410783513.8A CN202410783513A CN118346938B CN 118346938 B CN118346938 B CN 118346938B CN 202410783513 A CN202410783513 A CN 202410783513A CN 118346938 B CN118346938 B CN 118346938B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/25—Projection lenses
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
- F21S41/32—Optical layout thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
- F21V5/043—Refractors for light sources of lens shape the lens having cylindrical faces, e.g. rod lenses, toric lenses
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/04—Optical design
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
- F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
一种超窄透镜模组及车灯，包括反射镜和透镜组，透镜组包括第一透镜和第二透镜，反射镜具有反射焦点使得将光源设置在反射镜的反射焦点时光源的光经过反射镜反射形成平行光，透镜组水平方向的截面上将平行光聚焦在一起的聚焦点与光源距离最小，透镜组竖直方向的截面上将平行光聚焦在一起的聚焦点与光源距离最大，能够让平行光经过第一透镜和第二透镜聚焦形成水平方向宽度大于竖直方向高度的光斑。中心光轴聚焦的光线能够扩大照射范围，即能进一步减小竖直方向的尺寸又可以有较大的照射范围，而且还可以改善车灯的视觉效果，超窄车灯不仅符合当代大众审美的趋势而且能减小车灯的重量，降低车灯生产成本。
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, and 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
The invention belongs to the field of car lamps, and particularly relates to an ultra-narrow lens module and a car lamp.
Background
With the continuous development of optical technology, a lens group is widely used in various fields as an important component in an optical system. However, in the field of car lights, the conventional lens group often has problems of large volume, heavy weight, low production efficiency and the like, and is difficult to meet the requirements of modern optical equipment on high performance, miniaturization and light weight.
The traditional lens group of the car lamp is usually formed by combining a plurality of lenses, and the convergence and divergence of light rays are realized by adjusting the distance between the lenses and the focal length of the lenses, so that light spots required by illumination are formed. The formation of the spot requires consideration of the color of the light, the horizontal and/or vertical extension or profile of the light distribution, the maximum illuminance value, the location of the maximum illuminance within the light distribution, the light distribution at the light-dark boundary, the presence, design, routing and/or routing of the isocenter within the location or any other feature. However, this approach often requires the use of thicker lenses, resulting in a lens group that is bulky, heavy, and inefficient.
The light dispersion at the light emergent surface of the lens is the most common problem of the current car lamp module, and the light dispersion is mainly reflected in yellow light and blue light which are mutually separated on light spots. Theoretically, the superposition of yellow light and blue light separated by adjacent light rays will reform pure white light, but in practice, the skilled person finds that the brightness of the light spot, i.e. the light intensity, tends to decrease along the direction of separation of yellow light and blue light, due to the light spot. Thus, the superimposed yellow light intensity is greater than the blue light intensity, resulting in overall yellowing of the spot intensity.
The problems caused by the yellowish light spots include that the visual effect of a driver can be reduced by the yellowish light, the yellow light can cause the human eyes of the driver to be perceived to be strongly compared with a white light part during night driving, so that the recognition capability of roads and obstacles is reduced, the contrast on the roads can be reduced by the yellowish light, and the obstacles, vehicles, pedestrians and the like are more difficult to notice, so that traffic accidents are caused.
The application discloses an optical lens module, which comprises a first lens, a lens group and a curved total reflection lens, wherein the lens group comprises a second lens and a third lens, the second lens and the first lens are integrally formed, the third lens is arranged on one side of the second lens, a real focus of the lens group is positioned outside the second lens, one side of the first lens, which is opposite to the third lens, comprises an incident surface and an inclined surface which are connected with each other, the curved total reflection lens is arranged below the inclined surface, one side of the curved total reflection lens, which is opposite to the inclined surface, is convex, light emitted by an external light emitting source can enter from the incident surface and is reflected by the curved total reflection lens, the lens group can project light reflected by the inclined surface into parallel light, namely, the light reflected by the inclined surface can be projected into parallel light by the lens group, the light path of the lens group is folded, the length of the lens group is shortened, the optical (low beam) lens module is finally in the shape of the curved total reflection lens, namely, the curved total reflection lens is in the shape of the edge of the curved total reflection lens is in the shape of the curve, and the edge of the light has a near-free chromatic dispersion structure.
The patent with the patent name of 'CN 202310187410.0' is an 'optical lens and car lamp', the optical lens comprises a first lens, a lens group and a curved surface total reflection lens, wherein the lens group comprises a second lens and a third lens, the second lens and the first lens are integrally formed, the third lens is arranged on one side of the second lens, a real focus of the lens group is positioned in the second lens, one side of the first lens, which is opposite to the third lens, comprises a light incident surface and a first inclined surface which are connected with each other, the curved surface total reflection lens is arranged below the first inclined surface, one side of the curved surface total reflection lens, which is opposite to the first inclined surface, is convex, light emitted by an external light emitting source can enter from the light incident surface, is reflected by the curved surface total reflection lens, is reflected by the first inclined surface and is converged to the real focus, and the light passing through the real focus is projected into parallel light by the lens group, namely the real focus of the lens group is positioned at the convergence point of the reflected light of the curved surface total reflection lens. The optical path of the application is folded, the length of the module is shortened, and the final light type of the optical lens (high beam) provided by the application is the imaging of the light beam at the real focus of the lens group, so that the brightness, the color and the uniformity of the high beam type projected by the optical lens are all good.
That is, the prior art solves the problems of local yellowing and poor light sensation of the light type by folding the light path and shortening the length mode of the module. However, if the module is used in an ultra-narrow car lamp, the maximum light intensity of the center point is not strong enough, and the width is also narrow, that is, the distance of irradiation of the far-near light is not far enough, the light irradiation intensity at the two sides of the road surface is not enough, and there is room for improvement.
Disclosure of Invention
Aiming at the prior art, the invention aims to provide a more practical ultra-narrow lens module and a car lamp.
The technical scheme is that the ultra-narrow lens module comprises a reflector and a lens group, wherein the lens group comprises a first lens and a second lens, the reflector is provided with a reflecting focal point, so that when a light source is arranged at the reflecting focal point of the reflector, light of the light source is reflected by the reflector to form parallel light, the distance between a focusing point for focusing the parallel light together and the light source on the cross section of the lens group in the horizontal direction is minimum, the distance between the focusing point for focusing the parallel light together and the light source on the cross section of the lens group in the vertical direction is maximum, and the parallel light can be focused through the first lens and the second lens to form a light spot with the width in the horizontal direction being larger than the height in the vertical direction.
The lens group formed by 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 direction and the vertical direction, the parallel light forms focused light in the horizontal direction and the vertical direction through refraction of the lens group formed by the first lens and the second lens, the focused light effectively improves the problem of yellowing of the light spot edge compared with the parallel light, the focused light can expand the irradiation range, particularly for an ultra-narrow lens, the size in the vertical direction can be further reduced, the irradiation range can be larger, the visual effect of the vehicle lamp can be improved, the ultra-narrow vehicle lamp not only accords with the aesthetic trend of the current public, but also can reduce the weight of the vehicle lamp, the production cost of the vehicle lamp is reduced, and the ultra-narrow vehicle lamp is lighter and thinner and has higher production efficiency.
Further, the center of the lens group is provided with a center optical axis perpendicular to the lens group, a focus exists on at least one section passing through or parallel to the center optical axis of the first lens, the first lens is positioned between the second lens and the reflecting mirror, at least one focus exists on one section passing through or parallel to the center optical axis of the second lens, the reflecting mirror is provided with a starting point and the starting point is positioned on the center optical axis of the first lens and the center optical axis of the second lens, and the focusing points in the vertical direction of the lens group are all positioned near the starting point or the starting point of the reflecting mirror, so that non-parallel light reflected by the reflecting mirror can be uniformly irradiated, the problem that the brightness of light spots, namely the light density, is in a descending trend along the separation direction of yellow light and blue light can be effectively solved, and the yellowing effect of the light spots is improved.
Further, the first lens and the second lens are cylindrical lenses, the first lens is provided with a first focal line, the second lens is provided with a second focal line, the first focal line and the second focal line are not parallel and all penetrate through the starting point or the vicinity of the starting point of the reflecting mirror, the processing cost of the cylindrical lenses is lower, the illumination intensity of the starting point position of the reflecting mirror is higher, the non-parallel light rays at the position can be utilized to effectively improve the light spot yellowing effect, the reflecting mirror is too far away from the first lens and the second lens, the light rays scattered at the positions of the first focal line and the second focal line can form uniform and concentrated light rays through the first lens and the second lens by utilizing the light ray reversibility principle, and therefore the brightness of the central area of the light spot can be increased, and the light spot yellowing effect is improved.
Further, the first lens and the second lens are both provided with a plane side and a cambered surface side, the plane side is closer to the light source than the cambered surface side, and parallel light rays vertically enter the first lens and the second lens, so that the paths of the light rays refracted by the first lens and the second lens can be reduced, and the light spots are generated to be yellow by reducing refraction.
Further, 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, the first principal plane distance between the first focal line and the first lens is smaller than the second principal plane distance between the second focal line and the second lens, the formed light spot is wider in width, more areas can be irradiated, and the focal length of the first lens or the second lens can be directly adjusted when different light spots are designed, namely different light spots can be formed by adopting different lens combinations according to requirements.
Further, the first lens and the second lens adopt the same cylindrical lens, the first main plane of the first lens is parallel to the second main 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, the first lens and the second lens adopt the same structure, so that the development cost and the production cost of the cylindrical lens can be reduced, and different focal length changes in a certain range can be realized by changing the first focal line of the first lens and the second focal line of the second lens, and the requirements of different light spots can be met.
Further, 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 is at an angle to the second principal plane of the second lens, so that the 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, the thickness can be reduced for the same focal length, and the production cost can be reduced.
Further, the first principal plane of the first lens is inclined at a certain angle relative to the horizontal plane, the end face of the reflector which is inclined downwards is provided with the same inclination angle as the first lens, so that the opening of the reflector can be closed by the first lens, light rays of the reflector basically need to be transmitted forwards after passing through the first lens, due to the inclined arrangement of the first lens, part of light rays can be reflected to the reflector after reaching the first lens, most of light rays reflected by the reflector are basically parallel, so that the light rays reflected by the first lens are basically parallel, and the parallel light rays are reflected after reaching the reflector and form focused light rays, the part of focused light rays can be transmitted downwards in an inclined manner, and are scattered nearby ground through the action of the second lens.
Further, the reflector is provided with a reflecting area and a scattering area, the reflecting area is closer to the starting point of the reflector relative to the scattering area, and a third area reflector is arranged below the first lens and behind the second lens, so that light rays are more dispersed, the problem of light yellowing caused by refraction is reduced, light rays near the vehicle lamp are correspondingly increased, and the third area reflector can fully utilize light rays with larger inclination angles.
A car lamp comprises the ultra-narrow lens module and a light source, wherein the light source is positioned at a reflection focus position.
Drawings
FIG. 1 is a schematic perspective view of an ultra-narrow lens module according to the present invention;
FIG. 2 is a schematic view of the vertical direction optical path of embodiment 1 of the present invention;
FIG. 3 is a schematic view of the horizontal optical path of embodiment 1 of the present invention;
FIG. 4 is a schematic view of a horizontal optical path according to embodiment 2 of the present invention;
FIG. 5 is a schematic view of the vertical direction optical path of embodiment 3 of the present invention;
FIG. 6 is a schematic view of the horizontal optical path of embodiment 3 of the present invention;
FIG. 7 is a schematic view of the vertical direction optical path of embodiment 4 of the present invention;
FIG. 8 is a schematic view of the horizontal optical path of embodiment 4 of the present invention;
FIG. 9 is a schematic diagram showing the relative positions of the first lens and the second lens according to embodiment 5 of the present invention;
FIG. 10 is a schematic front view of a first lens and a second lens according to embodiment 5 of the present invention;
FIG. 11 is a schematic cross-sectional view of the position A-A of FIG. 10;
FIG. 12 is a schematic cross-sectional view of the B-B position of FIG. 10;
Fig. 13 is a schematic view showing the rotation structure of the first lens and the second lens according to embodiment 5 of the invention;
FIG. 14 is a schematic perspective view of embodiment 6 of the present invention;
FIG. 15 is a schematic view of the principal optical path in the vertical direction in embodiment 6 of the present invention;
FIG. 16 is a schematic view of the main light path of embodiment 6 of the present invention after being reflected by the first lens in the vertical direction;
FIG. 17 is a schematic view of the general optical path of embodiment 6 of the present invention after the scattering region and the third region mirror are disposed in the vertical direction;
FIG. 18 is a schematic view of a vertical direction optimized optical path according to embodiment 6 of the present invention;
Fig. 19 is a schematic view of a spot formed in accordance with the present invention.
In the figure, 1, a reflector, 2, a first lens, 3, a second lens, 4, a light source, 5, a gear, 7, a reflection area, 8, a scattering area, 9, a third area reflector, 23, a central optical axis, 24 and a starting point.
Detailed Description
As required, detailed embodiments of the present invention are disclosed herein, but it is to be understood that the disclosed embodiments are merely exemplary of the invention that may be embodied in various and alternative forms. The drawings are not drawn to scale, in order to ensure clear light path, the original design lens has smaller size in the vertical direction, so proper stretching is needed, the focal length in the horizontal direction is drawn according to the actual proportion, and the light spot is flat, mainly for the reason that the light path is more obvious, the actual light path is flatter. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, 2, 3, 4, 5 and 6, an ultra-narrow lens module includes a reflecting mirror 1 and a lens group including a first lens 2 and a second lens 3, the reflecting mirror 1 having a reflection focal point such that light of the light source 4 is reflected by the reflecting mirror 1 to form parallel light when the light source 4 is disposed at the reflection focal point of the reflecting mirror 1, a center of the lens group being provided with a center optical axis 23 perpendicular to the lens group, the first lens 2 and the second lens 3 being provided with the same center optical axis 23, and the light being emitted on the center optical axis 23 in a straight line or in a direction parallel to the straight line.
As shown in fig. 2 and 3, the central optical axis 23 light does not undergo refraction. The first lens 2 has at least one focal point in a cross section passing through or parallel to the central optical axis 23, and in the case of a cylindrical lens, the focal length of the first lens 2 in the cross section in the horizontal position is at a minimum, as shown in fig. 3, the focal length of the second lens 3 in the cross section in the horizontal position is at a maximum, i.e. infinity, as shown in fig. 2, the focal length of the first lens 2 in the cross section in the vertical position is at a maximum, and the focal length of the second lens 3 in the cross section in the vertical position is at a minimum. For the focal length of the lens group, the focal length of the section at the horizontal position is equal to the focal length of the horizontal section of the first lens 2, the focal length of the section at the vertical position is equal to the focal length of the vertical section of the second lens 3, the first lens 2 is positioned between the second lens 3 and the reflecting mirror 1, at least one focal point exists in a section passing through or parallel to the central optical axis 23, the section of the focal point of the minimum focal length of the first lens 2 is not parallel to the section of the focal point of the minimum focal length of the second lens 3, so that the shape of a light spot can be adjusted according to requirements, if the sections are parallel to each other and are all cylindrical lenses, focusing cannot be completed in one direction, and the focusing state of light cannot be changed by arranging two lenses.
As shown in fig. 2 and 3, the focal point of the minimum focal length is on a horizontal cross section, the focal point of the maximum focal length is on a vertical cross section, the two cross sections are perpendicular to each other, if the two cross sections are identical and parallel, i.e. lose the combined value, the focal change in different directions from each other is not changed to double the light spot, the ratio of the height and width of the light spot is not changed, the first lens 2 is combined with the second lens 3, the focal point of the parallel light is focused with the minimum distance from the light source 4 on the cross section of the lens group in the horizontal direction, the distance is equal to the sum of the focal length of the cross section in the horizontal direction and the distance from the lens group to the light source 4, in embodiment 1, the focal length of the cross section in the horizontal direction of the first lens 2 is just equal to the sum of the focal length of the lens group and the distance from the light source, that is, the first lens 2 is arranged closer to the light source 4, while the focal point of the lens group formed by combining the first lens 2 and the second lens 3 focusing the parallel light together is the largest in distance from the light source 4, and the distance is the sum of the focal length of the cross section in the vertical direction 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 provided with a larger focal length, on the other hand needs to be further away from the light source 4, and of course, the focal length is mainly arranged at a secondary position, the focal length can change the angle of light, and the distance of position change is limited. The parallel light is focused by the first lens 2 and the second lens 3 to form a light spot with the width in the horizontal direction being greater than the height in the vertical direction, in the embodiment 1, the light spot with the width in the horizontal direction being greater than the height in the vertical direction can be formed by focusing only the focal length of the second lens 3 being greater than the focal length of the first lens 2 for the light source 4 or the reflected light with the same length and width, and in other partial embodiments, the light spot width in some embodiments can be adjusted as required. The reflecting mirror 1 may be a spherical surface or other curved surface generated by a conic capable of focusing parallel light, such as a curved surface formed by parabolic rotation. The light source is as small as possible, so that more parallel light is easier to reflect, and the lens can be manufactured to be narrower by adopting the design, and the light spot effect is better.
Example 1:
As shown in fig. 1,2 and 3, the reflector 1 is provided with a start point 24 and the start point 24 is located on the central optical axis 23 of the first lens 2 and the second lens 3, the focal points of the lens group in the horizontal direction and the vertical direction are located near the start point 24 or the start point 24 of the reflector 1, the intensity of the reflected light near the start point 24 of the reflector 1 is highest, and as the light source 4 has a certain volume, the light reflected by the reflector 1 may not be all parallel light, for this part of non-parallel light, if the light is very close to the first lens 2 and the second lens 3, the light density is very small, and if the light is emitted from near the focal point, the formed light is concentrated in a small area, so the light density is very high. The reflecting mirror 1 is located above the central optical axis 23 of the first lens 2 and the second lens 3, and the parallel light reflected by the reflecting mirror 1 is refracted by the first lens 2 and the second lens 3 to form a spot located below the central optical axis 23. The light shape refracted on the road surface is basically that the lens group consisting of the first lens 2 and the second lens 3 focuses the parallel light reflected by the reflecting mirror 1 through the lens group to converge the converged light with one focus to the front of the vehicle and form an inverted and amplified light spot, the reflecting mirror 1 is completely positioned on the upper side of the central optical axis 23, so that the parallel light reflected by the reflecting mirror 1 forms a plurality of groups of light rays with different focusing focal lengths after passing through the lens group, and after a certain distance, the light rays all reach the lower side of the central optical axis 23, and obvious illumination intensity difference is formed on the upper side and the lower side of the central optical axis 23, namely a cut-off line is formed, and an extra light type baffle is not needed.
As shown in fig. 2 and 3, the light irradiation direction is defined as forward irradiation, that is, the reflector 1 is located rearwards 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 rear side of the first lens 2 has a first focal line and the rear side of the second lens 3 has a second focal line, and the first focal line and the second focal line are not parallel and all pass near a starting point 24 or a starting point 24 of the reflector 1. To increase the brightness of the central area in the horizontal direction, the second focal line may pass through the light source 4, so that the light emitted from the light source 4 in the horizontal direction may be converged into parallel light, and thus the brightness of the central position of the spot may be increased.
As shown in fig. 2 and 19, when viewed from the vertical direction, the light emitted by the light source 4 is reflected by the reflector 1 to form a large amount of parallel light rays, the parallel light rays 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 rays vertically enter the first lens 2, the light rays directly vertically exit the first lens 2, and the second lens 3 has focusing effect in the vertical direction, so that the parallel light rays can be converged into non-parallel focusing light rays, and because the reflector 1 is completely positioned on the upper side of the central optical axis 23, the parallel light rays can be completely irradiated below the central optical axis 23 after focusing, and thus the light spot is in an inverted state relative to the reflector 1 and has a cut-off line. The second focal line is located at the position of the starting point 24 of the reflector 1, the reflected light ray density near the starting point 24 is maximum, and the parallel light ray near the starting point 24 can be refracted into focused light rays through the second lens 3 to be emitted out of the second lens 3, so that the light rays of the central area of the light spot are more concentrated relative to the edge area, and the brightest part of the central area of the light spot is formed.
As shown in fig. 3 and 19, when viewed from the horizontal direction, the light emitted by the light source 4 is reflected by the reflecting mirror 1 to form a large number of parallel light rays to propagate to the light incident surface of the first lens 2, the first lens 2 has a focusing effect in the horizontal direction to converge the parallel light rays into non-parallel focused light rays, while the second lens 3 has no focusing effect in the horizontal direction, so that the light focused in the horizontal direction continues to propagate in a direction parallel to the original direction through the light refraction of the second lens 3, that is, the second lens 3 does not substantially affect the light spot formed by the light propagation, if the first focal line is located at the position of the starting point 24 of the reflecting mirror 1, the reflected light ray density near the starting point 24 is the largest, the divergent light ray near the position of the starting point 24 can be refracted into parallel light rays by the first lens 2 to be emitted from the first lens 2, the parallel light rays near the position of the starting point 24 can be refracted into focused light rays by the first lens 2, so that the light rays are concentrated relative to the edge regions of the central regions of the light spot to form the brightest portions of the central regions of the light spots, and if the light source 4 is located at the position of the first focal line, the light source 4 directly divergently irradiates the central regions of the first lens 2, and the refracted light rays are brighter to the central regions of the light spots.
As shown in fig. 2 and 3, the first lens 2 and the second lens 3 are each provided with a planar side and an arc side, and the planar side is closer to the light source 4 than the arc side.
As shown in fig. 2 and3, the first focal line of the first lens 2 is located in a vertical direction, the second focal line of the second lens 3 is located in a horizontal direction, and the first principal plane distance between the first focal line and the first lens 2 is smaller than the second principal plane distance between the second focal line and the second lens 3. From production efficiency, the lens with the thickness of 15mm needs to be injection molded for 8-10 minutes, and the lens with the thickness of 3mm needs only 1 minute, so that the production efficiency is greatly improved, the thicknesses of the second lens 3 and the first lens 2 in the material-saving embodiment are less than 3mm, and compared with the lens with the thickness of 15mm in the prior art, the production efficiency is greatly improved, and the production cost is reduced.
Example 2:
As shown in fig. 1 and 4, the first lens 2 or the second lens 3 is an aspherical lens, the focal length of the cross section of the first lens 2 in the vertical direction is far greater than the focal length of the cross section in the horizontal direction, and the focal length of the cross section of the second lens 3 in the vertical direction is far smaller than the focal length of the cross section in the horizontal direction, so that focused light is formed mainly by the second lens 3 in the vertical direction and focused light is formed mainly by the first lens 2 in the horizontal direction. The processing cost of this embodiment is higher, but the same or similar light paths in example 1 can be formed, and similar technical effects, that is, the effect of improving the spot yellowing, are achieved.
Example 3:
As shown in fig. 5 and 6, this embodiment corresponds to inserting the second lens 3 in embodiment 1 between the first lens 2 and the reflecting mirror 1, in which the light is more concentrated in the horizontal direction but slightly dispersed in the vertical direction due to the change of the position, and the influence on the parallel light is smaller, and the first lens 2 or the second lens 3 may use the cylindrical lenses with the same focal length in embodiment 1, and may form the same or similar optical paths in embodiment 1, so as to achieve similar technical effects.
Example 4:
As shown in fig. 7 and 8, the reflecting mirror 1 is an inner lens, that is, light rays are reflected into parallel lines inside the inner lens, and the first lens 2 and the second lens 3 can be designed in the same way as in embodiment 1, so that the same or similar light paths in embodiment 1 can be formed, and similar technical effects can be achieved.
Example 5:
As shown in fig. 9, 10, 11 and 12, the first lens 2 and the second lens 3 adopt the same cylindrical lens, the first main plane of the first lens 2 is parallel to the second main 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 cross section and the vertical cross section can be adjusted through the change of the size of the angle, and for a curved mountain road, the wider the light spot width, the wider the field of view, the focal length can be increased, the focal length of the horizontal cross section can be reduced by increasing the angles between the first focal line and the second focal line and the horizontal plane, and the focal length of the vertical cross section can be reduced by decreasing the angles between the first focal line and the second focal line and the horizontal plane for a mountain road with larger lifting. The included angles of the first focal line and the second focal line with the horizontal plane are smaller than 30 degrees on the conventional road surface.
As shown in fig. 13, the first lens 2 and the second lens 3 are designed into a circular shape, a gear 5 is arranged outside the lenses, and the gear 5 is directly or indirectly driven by a motor, so that the width of the light spot can be adjusted according to different road conditions, and the optimal lighting effect is obtained.
Example 6:
As shown in fig. 14, 15 and 16, 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 is at an angle to the second principal plane of the second lens 3. The first principal plane of the first lens 2 is inclined at an angle to the horizontal plane, and the mirror 1 is provided with an end face inclined downwards at the same angle as the first lens 2. Thus, the light reflected by the first lens 2 is reflected again by the reflecting mirror 1, the reflecting mirror 1 focuses the parallel light together, and most of the light is inclined downward by the reflecting mirror 1, and if the second lens 3 is positioned close to the first lens 2, the light diverges and emits downwards through the lens, so that the brightness near the vehicle lamp can be increased. Fig. 16 is a schematic view of a light ray reflected twice, and it can be seen that the light ray is emitted substantially obliquely downward.
As shown in fig. 17 and 18, in an ideal state, the reflector 1 will generate total reflection, but in a practical situation, scattering will occur, for driving at a relatively high speed, the light at a close distance will not have much effect, so that it is necessary to increase the density of light at a middle distance and a far distance, because of the angle problem, the total reflection will be inclined downward, therefore, the reflector 1 may 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 disposed at the position where a large amount of reflected light is irradiated by the first lens 2, and these light rays are difficult to fully utilize due to the angle problem, so that a large amount of parallel light can be generated at the scattering area 8 to enter the first lens 2 and the second lens 3, as shown in fig. 18, the illumination density at a medium distance is increased, and the tendency of yellowing of light is improved. For light rays with other angles, as shown in fig. 17, the light rays of the scattering region 8 can be reflected to a more ideal far-reaching position or directly irradiated to a nearer position for fully utilizing the light rays of the light source 4. As shown in fig. 17, a third zone mirror 9 is disposed below the first lens 2 and behind the second lens 3, so that light rays with a large angle can be fully utilized for irradiating the zone III, which meets the legal standards.
As shown in fig. 19, a vehicle lamp includes the above ultra-narrow lens module and a light source 4, the light source 4 being located at a reflection focal point position. The light spots formed by the car lamp are flat, the light rays can be irradiated to farther positions in the central area due to larger density, and the light rays on two sides are divergent and can be irradiated to a larger range.
Claims (9)
1. The utility model provides an ultra-narrow lens module, includes speculum (1) and lens group, the lens group includes first lens (2) and second lens (3), speculum (1) have reflection focus so that set up light source (4) when the reflection focus of speculum (1) light of light source (4) passes through speculum (1) reflection forms parallel light, its 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 positioned on the central optical axis (23) of the lens group, and a focusing point in the vertical direction of the lens group is positioned on the starting point (24) of the reflector (1);
the first main plane of the first lens (2) is inclined at a certain angle relative to the horizontal plane, and the reflecting mirror (1) is provided with an end face which is inclined downwards;
The reflector (1) is provided with a reflecting region (7) and a scattering region (8), the reflecting region (7) being closer to the starting point (24) of the reflector (1) than the scattering region (8);
the distance between the focusing point for focusing the parallel light together on the cross section of the lens group in the horizontal direction and the light source (4) is the smallest;
The distance between a focusing point for focusing the parallel light together on the cross section of the lens group in the vertical direction and the light source (4) is the largest;
The parallel light can be focused through the first lens (2) and the second lens (3) to form a light spot with the width in the horizontal direction being larger than the height in the vertical direction.
2. Ultra-narrow lens module according to claim 1, characterized in that the first lens (2) has a focus at least in a cross section passing through or parallel to the central optical axis (23), the first lens (2) being located intermediate the second lens (3) and the mirror (1), the second lens (3) having a focus at least in a cross section passing through or parallel to the central optical axis (23).
3. The ultra-narrow lens module according to claim 2, wherein the first lens (2) and the second lens (3) are cylindrical lenses, the first lens (2) having a first focal line and the second lens (3) having a second focal line, the first focal line and the second focal line being non-parallel and both passing through a starting point (24) of the mirror (1).
4. An ultra-narrow lens module according to claim 3, wherein the first lens (2) and the second lens (3) are provided with a planar side and a cambered side, the planar side being closer to the light source (4) than the cambered side.
5. The ultra-narrow lens module according to claim 4, wherein a first focal line of the first lens (2) is located in a vertical direction, a second focal line of the second lens (3) is located in a horizontal direction, and a first principal plane distance of the first focal line from the first lens (2) is smaller than a second principal plane distance of the second focal line from the second lens (3).
6. The ultra-narrow lens module according to claim 4, wherein the first focal line of the first lens (2) is perpendicular to the second focal line of the second lens (3), the first principal plane of the first lens (2) being at an angle to the second principal plane of the second lens (3).
7. The ultra-narrow lens module according to claim 6, wherein the mirror (1) is provided with an end surface inclined downwards at the same angle as the first lens (2).
8. Ultra-narrow lens module according to claim 7, characterized in that a third zone mirror (9) is provided below the first lens (2) and behind the second lens (3).
9. A vehicle lamp, characterized in that it comprises an ultra-narrow lens module according to any one of claims 1-8 and a light source (4), said light source (4) being located at a reflective focal point.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410783513.8A CN118346938B (en) | 2024-06-18 | 2024-06-18 | Ultra-narrow lens module and car lamp |
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| CN202410783513.8A CN118346938B (en) | 2024-06-18 | 2024-06-18 | Ultra-narrow lens module and car lamp |
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| CN118346938B true CN118346938B (en) | 2024-12-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116221647A (en) * | 2023-05-08 | 2023-06-06 | 常州星宇车灯股份有限公司 | Car light high beam lighting system, lighting module and vehicle |
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| FR3058105B1 (en) * | 2016-10-28 | 2021-04-02 | Valeo Vision | OPTICAL MODULE FOR PROJECTING A CUT-OFF LIGHT BEAM WITH HORIZONTAL FOCUSING MEANS |
| KR102663839B1 (en) * | 2020-06-22 | 2024-05-08 | 현대모비스 주식회사 | Lamp for vehicle |
| CN114659067A (en) * | 2022-03-29 | 2022-06-24 | 镇江景辉精密机械有限公司 | Projection type dipped beam module for vehicle |
| CN217816527U (en) * | 2022-09-02 | 2022-11-15 | 常州星宇车灯股份有限公司 | Lens optical module and automobile lighting device using same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116221647A (en) * | 2023-05-08 | 2023-06-06 | 常州星宇车灯股份有限公司 | Car light high beam lighting system, lighting module and vehicle |
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