Ground lighting lamp optical lens, equipment and system

Abstract

The invention provides an optical lens, equipment and system for a ground lighting lamp, and relates to the technical field of automobile spare parts, and the optical lens for the ground lighting lamp comprises a condensing lens assembly and an imaging lens assembly which are sequentially arranged from the optical axis of a light source to the projection side; the condensing lens assembly gathers the light received by the condensing lens assembly on the image forming component, and an oval focusing light spot is formed on the image forming component. Light rays are mainly concentrated and irradiated on the image forming component with the large length-width ratio through the condensing lens assembly, the utilization rate of the light rays is improved, meanwhile, the projection irradiation brightness of the image forming component with the large length-width ratio is improved, the image forming component with the large length-width ratio is made to carry out high-brightness clear projection, the projection effect is good, and the projection effect is good. And the influence on the projection quality of the large-length-width-ratio image due to symmetrical light spots appearing on the projection of the large-length-width-ratio image forming component by a conventional projection lens is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile parts, and in particular to an optical lens, equipment and system for a ground lighting lamp. Background Art

[0002] The car ground light is essentially a mini projector. With the development of technology, the application of this device in cars has become more and more widespread. Usually, many car brands and logos, as well as some short sentences and greetings, are projected onto the ground through the car ground light. In most cases, these ground lights display static images.

[0003] The projection screen of the vehicle-mounted ground light is usually composed of a focusing lens group, a film and an imaging lens group. Its working principle is: the light emitted by the light source is focused onto the display screen through the focusing lens, and then magnified and projected onto the ground through the imaging lens group.

[0004] The film floor lights currently on the market can clearly project and display film images with a smaller aspect ratio. However, since some vehicle-mounted floor lights need to project images that are longer than they are wide, conventional vehicle-mounted floor lights are not suitable. When projecting images that are longer than they are wide, symmetrical light spots appear in the length direction of the projected image, the projected image is unevenly distributed, and the low light utilization rate results in unclear display and poor projection effect. Summary of the invention

[0005] The object of the present invention is to provide an optical lens for a ground light, so as to solve the problem that conventional vehicle-mounted ground lights are not suitable for image projection with a large aspect ratio, and to provide clear projection of images with a large aspect ratio.

[0006] On the one hand, to achieve the above-mentioned purpose, the present invention provides an optical lens for a ground lighting, comprising a focusing lens assembly and an imaging lens assembly arranged in sequence from the optical axis of the light source to the projection side; the focusing lens assembly focuses the light it receives on an image forming component and forms an elliptical focusing spot on the image forming component, the image forming component has a rectangular cross-section, and the long axis of the focusing spot is parallel to the long side of the image forming component; the imaging lens assembly is used to magnify the image projected by the image forming component.

[0007] The beneficial effects of the present invention are as follows: the light is mainly gathered in the length direction of the image forming component through the focusing lens assembly, and part of the light is gathered in the width direction of the image forming component to form an elliptical focusing spot, thereby focusing and irradiating the image forming component with a large aspect ratio. The image of the image forming component after irradiation is magnified and projected through the imaging lens assembly. The focusing lens assembly mainly focuses and irradiates the light on the image forming component with a large aspect ratio, thereby improving the utilization rate of the light and at the same time improving the projection irradiation brightness of the image forming component with a large aspect ratio, so that the image forming component with a large aspect ratio can be projected with high brightness and clarity, with good projection effect, and avoiding the symmetrical light spot that appears when a conventional projection lens is used to project an image forming component with a large aspect ratio, which affects the projection quality of the image with a large aspect ratio, and has good use effect.

[0008] As a further solution of the present invention: the focusing lens assembly includes a first focusing lens and a second focusing lens arranged in sequence from the optical axis of the light source to the projection side, one end face of the first focusing lens or the second focusing lens is a cylindrical surface, and the cylindrical surface of the first focusing lens or the second focusing lens is used to form an elliptical focusing spot, and the long axis of the focusing spot is parallel to the long side of the image forming component.

[0009] As a further solution of the present invention: the end face on the light source side and the end face on the projection side of the first condensing lens are both spherical surfaces, the end face on the light source side of the second condensing lens is a cylindrical surface, the end face on the projection side of the second condensing lens is a spherical surface, the tangent line between the cylindrical surface and the perpendicular plane of the optical axis is parallel to the long side of the image forming component, the cylindrical surface of the second condensing lens is used to form an elliptical focusing spot, and the long axis of the focusing spot is parallel to the long side of the image forming component.

[0010] As a further solution of the present invention: the end face of the light source side of the first condensing lens is a cylindrical surface, the end face of the projection side of the first condensing lens is a spherical surface, the end face of the light source side and the projection side of the second condensing lens are both spherical surfaces, the tangent line of the cylindrical surface and the perpendicular plane of the optical axis is parallel to the long side of the image forming component, the cylindrical surface of the first condensing lens is used to form an elliptical focusing spot, and the long axis of the focusing spot is parallel to the long side of the image forming component.

[0011] As a further solution of the present invention: the imaging lens assembly includes a first imaging lens, a second imaging lens and a third imaging lens arranged in sequence from the optical axis of the light source to the projection side, the light source side end face of the first imaging lens is a concave non-spherical surface, the projection side end face of the first imaging lens is a convex non-spherical surface, the light source side end face and the projection side end face of the second imaging lens are both concave spherical surfaces, the light source side end face of the third imaging lens is a concave non-spherical surface, the projection side end face of the third imaging lens is a convex non-spherical surface, and the first imaging lens, the second imaging lens and the third imaging lens are used for enlarged projection imaging of the image forming component.

[0012] As a further solution of the present invention: the focal length ratio of the first imaging lens, the second imaging lens and the third imaging lens is 1:-1.5:1.5, and the thickness ratio of the first imaging lens, the second imaging lens and the third imaging lens is: 1:1:1.38.

[0013] As a further solution of the present invention: the radius value of the end surface on the light source side of the first imaging lens is 7mm-8mm, the radius value of the end surface on the projection side of the first imaging lens is 4.5mm-5mm, the radius value of the end surface on the light source side of the second imaging lens is 4.5mm-5mm, the radius value of the end surface on the projection side of the second imaging lens is 260mm-270mm, the radius value of the end surface on the light source side of the third imaging lens is 50mm-60mm, and the radius value of the end surface on the projection side of the third imaging lens is 5mm-5.5mm.

[0014] In a second aspect, a ground-lighting light optical lens device is also provided, which adopts the ground-lighting light optical lens as described in the above solution.

[0015] On the third aspect, there is also provided an optical lens system for a ground lighting lamp, comprising a light source, a focusing lens assembly, an image forming component for projection and an imaging lens assembly arranged in sequence, wherein the focusing lens assembly and the imaging lens assembly are both arranged on the optical axis of the light source, the long side of the image forming component is larger than the wide side, the focusing lens assembly is used to focus the light emitted by the light source along the length direction of the image forming component, and the imaging lens assembly is used to magnify the projection image of the image forming component.

[0016] As a further solution of the present invention: the light source is a light emitting diode, and the image forming component is a film.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention mainly focuses the light in the length direction of the image forming component through the focusing lens assembly, and partially focuses the light in the width direction of the image forming component to form an elliptical focusing spot, thereby focusing and irradiating the image forming component with a large aspect ratio. The image of the image forming component after irradiation is magnified and projected through the imaging lens assembly. The focusing lens assembly mainly focuses the light and irradiates it on the image forming component with a large aspect ratio, thereby improving the utilization rate of the light and the projection irradiation brightness of the image forming component with a large aspect ratio, so that the image forming component with a large aspect ratio can be projected with high brightness and clarity, with good projection effect, and avoiding the symmetrical light spot that appears when a conventional projection lens is used to project an image forming component with a large aspect ratio, which affects the projection quality of the image with a large aspect ratio, and has good use effect.

[0018] 2. The present invention projects an image with an aspect ratio greater than : on an image forming component through a ground-light optical lens system, illuminates the display screen through a condenser lens assembly, so that the irradiated light is effectively concentrated on the image of the image forming component, and the imaging lens assembly magnifies the image and projects it onto the ground. The vehicle-mounted ground-light adopted in the ground-light optical lens system has a unique design, clear imaging, uniform brightness and compact structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the three-dimensional structure of the first embodiment of the optical lens for a ground-illuminating lamp provided by the present invention; Figure 2 The present invention provides a schematic diagram of the explosion structure of the first embodiment of the ground light optical lens; Figure 3 The present invention provides a stereogram of the second focusing lens in the first embodiment of the optical lens for lighting the ground; Figure 4 The present invention provides a first condenser lens stereogram of the second embodiment of the ground light optical lens; Figure 5 The present invention provides a side view of a first embodiment of the optical lens for lighting the ground; Figure 6 The present invention provides an overall cross-sectional view of a first embodiment of the optical lens for lighting the ground; Figure 7 The present invention provides a light trend diagram of the first embodiment of the ground light optical lens; Figure 8 The present invention provides a modulation transfer function diagram of a first embodiment of the ground light optical lens; Fig. 9 A projection distortion percentage diagram of the first embodiment of the optical lens for a ground-illuminating lamp is provided for the present invention.

[0020] In the figure: 1. light source; 2. first focusing lens; 3. second focusing lens; 4. image forming component; 5. first imaging lens; 6. second imaging lens; 7. third imaging lens. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be understood by people with general skills in the field to which the present invention belongs. "Including" and similar words used in this article mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0022] like Figure 1-Figure 7 As shown, an optical lens for a ground lighting lamp is provided, comprising a focusing lens assembly and an imaging lens assembly which are arranged in sequence from the optical axis of the light source 1 to the projection side; the focusing lens assembly focuses the light it receives on an image forming component 4, and forms an elliptical focusing spot on the image forming component 4, the image forming component 4 has a rectangular cross-section, and the long axis of the focusing spot is parallel to the long side of the image forming component 4; the imaging lens assembly is used to magnify the image projected by the image forming component.

[0023] Specifically, the image forming component 4 is a substrate of a transparent material, on which a desired image is formed by coating or etching, and the image forming component 4 has a longer side than a wider side, wherein the width direction of the image forming component 4 is the X direction, the length direction of the image forming component 4 is the Y direction, and Y / X is greater than 10:1. The focusing lens assembly and the imaging lens assembly are coaxially mounted on the optical axis of the light source 1, and the focusing lens assembly focuses the light emitted by the light source 1 along the length direction of the image forming component 4 to form an elliptical focused light spot, wherein the major axis of the focused light spot is parallel to the long side of the image forming component 4, so that the light is mainly focused and irradiated on the image forming component 4, and the image formed by the focused light irradiating on the image forming component 4 is magnified and imaged by the imaging lens assembly, and then projected onto the imaging surface. The lens can improve the utilization rate of light and clearly project and image the image forming component 4 with a Y / X greater than 10:1.

[0024] The present invention mainly focuses the light in the length direction of the image forming component 4 through the focusing lens assembly, and partially focuses the light in the width direction of the image forming component 4 to form an elliptical focusing spot, thereby focusing and irradiating the image forming component 4 with a large aspect ratio. The image of the image forming component 4 after irradiation is magnified and projected through the imaging lens assembly. The focusing lens assembly mainly focuses the light and irradiates it on the image forming component 4 with a large aspect ratio, thereby improving the utilization rate of the light and simultaneously improving the projection irradiation brightness of the image forming component 4 with a large aspect ratio, so that the image forming component 4 with a large aspect ratio can be projected with high brightness and clarity, with good projection effect, and avoiding the symmetrical light spot that appears when a conventional projection lens projects an image forming component 4 with a large aspect ratio, which affects the projection quality of the image with a large aspect ratio, and has good use effect.

[0025] Preferably, the condenser lens assembly includes a first condenser lens 2 and a second condenser lens 3 arranged in sequence from the optical axis of the light source 1 to the projection side, one end surface of the first condenser lens 2 or the second condenser lens 3 is a cylindrical surface, and the cylindrical surface of the first condenser lens 2 or the second condenser lens 3 is used to form an elliptical focusing spot, and the long axis of the focusing spot is parallel to the long side of the image forming component. The first condenser lens 2 and the second condenser lens 3 evenly distribute the initial light emitted by the light source 1, and condense the light along the length direction of the image forming component 4 through a cylindrical surface of the first condenser lens 2 or the second condenser lens 3 to form an elliptical focusing spot, so that the light is evenly irradiated on the image forming component 4. The cylindrical surface is a surface parallel to the optical axis and having an arc-shaped notch with a width matching that of the first condensing lens 2 or the second condensing lens 3, and is a surface formed by moving and cutting along the longitudinal direction of the first condensing lens 2 or the second condensing lens 3. The cylindrical surface is an ellipse after being unfolded on a surface perpendicular to the optical axis, and the short axis of the unfolded ellipse is equal to the diameter of the first condensing lens 2 or the second condensing lens 3, and the long axis of the unfolded ellipse is greater than the diameter of the first condensing lens 2 or the second condensing lens 3.

[0026] Embodiment 1: In this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 7As shown, the end surface on the light source 1 side and the projection side of the first condenser lens 2 are both spherical surfaces, the end surface on the light source 1 side of the second condenser lens 3 is a cylindrical surface, and the end surface on the projection side of the second condenser lens 3 is a spherical surface. The tangent line between the cylindrical surface and the perpendicular plane of the optical axis is parallel to the long side of the image forming component 4. The cylindrical surface of the second condenser lens 3 is used to form an elliptical focusing spot, and the long axis of the focusing spot is parallel to the long side of the image forming component. The light emitted by the light source 1 passes through the spherical surface on the light source 1 side of the first condenser lens 2, the spherical surface on the projection side of the first condenser lens 2, the cylindrical surface on the light source 1 side of the second condenser lens 3, and the spherical surface on the projection side of the second condenser lens 3 in sequence. The spherical surfaces of the end surface on the light source 1 side and the projection side of the first condenser lens 2 evenly distribute and gather the light emitted by the light source 1, thereby making the light evenly distributed on the second condenser lens 3, as shown in FIG. Figure 3 As shown, the end face of the second condenser lens 3 on the light source 1 side is a cylindrical surface, the end face of the second condenser lens 3 on the projection side is a spherical surface, and the tangent line between the cylindrical surface of the second condenser lens 3 and the vertical plane of the optical axis is Figure 3 The line marked at a in the middle, the length of the line marked at a is equal to the diameter of the second focusing lens 3, wherein the line marked at a is the short axis of the ellipse after the cylindrical surface on the second focusing lens 3 is unfolded on the surface perpendicular to the optical axis, the long axis of the ellipse after unfolding is larger than the line marked at a, the line marked at a is parallel to the long side of the image forming component 4, the cylindrical surface mainly gathers the light and irradiates it on the long side of the image forming component 4, the second focusing lens 3 refracts the light so that the light is gathered into a projection surface with a large aspect ratio, the light is gathered into a focused light spot with a large aspect ratio and an elliptical shape and irradiates the image forming component 4, the graphic body with a large aspect ratio is focused and projected, wherein the aspect ratio of the graphic body is greater than 10:1, the projection after irradiating the image forming component 4 is magnified and projected by the imaging lens assembly, and then projected on the projection surface, the light utilization rate is high, the projection brightness is high, the image of the projected graphic body with a large aspect ratio is clear, no bright spots are generated, the projected image is evenly distributed, and the use effect is good.

[0027] Preferably, the imaging lens assembly includes a first imaging lens 5, a second imaging lens 6 and a third imaging lens 7 which are arranged in sequence from the optical axis of the light source 1 to the projection side, the end face of the first imaging lens 5 on the light source 1 side is a concave non-spherical surface, the end face of the first imaging lens 5 on the projection side is a convex non-spherical surface, the end face of the second imaging lens 6 on the light source 1 side and the projection side end face are both concave spherical surfaces, the end face of the third imaging lens 7 on the light source 1 side is a concave non-spherical surface, and the end face of the third imaging lens 7 on the projection side is a convex non-spherical surface, and the first imaging lens 5, the second imaging lens 6 and the third imaging lens 7 are used for magnified projection imaging of the image forming component 4. The light sequentially passes through the concave non-spherical surface on the light source 1 side of the first imaging lens 5, the convex non-spherical surface on the projection side of the first imaging lens 5, the concave spherical surface on the light source 1 side of the second imaging lens 6, the concave spherical surface on the projection side of the second imaging lens 6, the concave non-spherical surface on the light source 1 side of the third imaging lens 7 and the convex non-spherical surface on the projection side of the third imaging lens 7. The first imaging lens 5, the second imaging lens 6 and the third imaging lens 7 are combined to refract and magnify the tiny inverted image projected by the image forming component 4 to form an enlarged upright image, thereby forming a clear enlarged upright projection of the graphic on the image forming component 4.

[0028] Preferably, the focal length ratio of the first imaging lens 5, the second imaging lens 6 and the third imaging lens 7 is 1:-1.5:1.5, and the thickness ratio of the first imaging lens 5, the second imaging lens 6 and the third imaging lens 7 is 1:1:1.38. The focal length ratio and thickness ratio between the first imaging lens 5, the second imaging lens 6 and the third imaging lens 7 can enlarge the image projected by the image forming component 4 with a large aspect ratio and perform upright projection, ensuring that the image forming component 4 with a large aspect ratio is clearly projected.

[0029] Preferably, the radius of the end face on the light source 1 side of the first imaging lens 5 is 7mm-8mm, the radius of the end face on the projection side of the first imaging lens 5 is 4.5mm-5mm, the radius of the end face on the light source 1 side of the second imaging lens 6 is 4.5mm-5mm, the radius of the end face on the projection side of the second imaging lens 6 is 260mm-270mm, the radius of the end face on the light source 1 side of the third imaging lens 7 is 50mm-60mm, and the radius of the end face on the projection side of the third imaging lens 7 is 5mm-5.5mm. Under this setting, the light trend of the optical lens of the ground light is as follows: Figure 7As shown, the image forming component 4 with a large aspect ratio is projected clearly. The optical lens of the ground light is composed of a condenser lens assembly and an imaging lens assembly. The condenser lens assembly consists of two asymmetric first condenser lenses 2 and second condenser lenses 3, which concentrate the light along the length direction of the picture, and the light utilization rate is high to improve the illumination brightness of the picture. The imaging lens assembly consists of a three-piece first imaging lens 5, a second imaging lens 6 and a third imaging lens 7, and adopts the same plastic resin material, with clear imaging. The optical lens of the ground light has a total of five pieces, the picture is clear and has no deformation, the picture brightness is uniform and the illumination brightness is high.

[0030] The specific parameters of the first imaging lens 5 and the third imaging lens 7 are as follows: Furthermore, the interval between the second imaging lens 6 and the third imaging lens 7 is 0.6mm-1.0mm, the aperture surface is located on the projection side of the third imaging lens 7, and the interval between the first imaging lens 5 and the second imaging lens 6 is 1mm-1.3mm.

[0031] Furthermore, the refractive surface of the lens may be processed by grinding or injection molding, and the lens may be composed of a composite lens in which a plurality of lenses are bonded together.

[0032] The length units of the above lenses are in millimeters, but since the optical system can obtain the same optical performance even if it is proportionally enlarged or proportionally reduced, it is not limited to this. The unit is not limited to millimeters, and other appropriate units may also be used, including but not limited to centimeters, decimeters, meters, etc.

[0033] Under the above setting, the imaging lens assembly projects the image of the image forming component 4 (the number of black and white line pairs on the image forming component 4 is 10 line pairs / mm) to form a modulation transfer function (MTF) as shown in FIG. Figure 8 As shown, the MTF curve can reflect that the imaging lens assembly of this setting can project images clearly and has a strong ability to reproduce image details.

[0034] Among them, MTF (Modulation Transfer Function) is used in projection technology to describe the clarity and detail retention of an image. The MTF curve is a graph with the horizontal axis representing spatial frequency and the vertical axis representing contrast. The higher the MTF value, the stronger the lens's ability to retain details in high-frequency areas. In a projection system, the MTF value is critical to ensuring image quality. Lenses with high MTF values ​​can maintain better contrast at different spatial frequencies, thereby providing clearer and sharper images. This is very important for application scenarios that require high detail performance, such as professional presentations or educational environments. In general, the MTF in projection represents the lens's ability to reproduce image details and is one of the important indicators for evaluating the performance of projection equipment.

[0035] Among them, the imaging lens assembly under the above settings, the image distortion output diagram is as follows Fig. 9 As shown, the distortion of the image distortion output is less than 2%. Fig. 9 The image distortion is close to 1.9%, and the image distortion is small, so the image of the image forming component 4 with a large aspect ratio can be projected clearly.

[0036] Embodiment 2: In this embodiment, Figure 4 As shown, the end face of the first condenser lens 2 on the light source 1 side is a cylindrical surface, the end face of the first condenser lens 2 on the projection side is a spherical surface, the end face of the second condenser lens 3 on the light source 1 side and the projection side end face are both spherical surfaces (not shown), the tangent line between the cylindrical surface and the perpendicular plane of the optical axis is parallel to the long side of the image forming component 4, and the cylindrical surface of the first condenser lens 2 is used to form an elliptical focusing spot, and the major axis of the focusing spot is parallel to the long side of the image forming component. The light emitted by the light source 1 passes through the cylindrical surface of the first condenser lens 2 on the light source 1 side, the spherical surface of the first condenser lens 2 on the projection side, the spherical surface of the second condenser lens 3 on the light source 1 side, and the spherical surface of the second condenser lens 3 on the projection side in sequence, and the tangent line between the cylindrical surface of the first condenser lens 2 on the light source 1 side and the perpendicular plane of the optical axis is Figure 4 The line marked at b in the middle, the length of the line marked at b is equal to the diameter of the first condensing lens 2, wherein the line marked at b is the short axis of the ellipse after the cylindrical surface on the first condensing lens 2 is unfolded on the surface perpendicular to the optical axis, the long axis of the ellipse after unfolding is larger than the line marked at b, and the line marked at b is parallel to the long side of the image forming component 4, the first condensing lens 2 refracts the light to gather the light into a focusing spot with a large aspect ratio and an elliptical shape, the focusing spot is gathered by the second condensing lens 3, the long side of the focused projection surface corresponds to the long side of the image forming component 4, the projection surface gathered by the second condensing lens 3 is matched and irradiated on the image forming component 4, the graphic body with a large aspect ratio is focused and projected, wherein the aspect ratio of the graphic body is greater than 10:1, the projection after irradiating the image forming component 4 is magnified and projected by the imaging lens assembly, and then projected on the projection surface, the light utilization rate is high, the projection brightness is high, the image of the projected graphic body with a large aspect ratio is clear, no bright spots are generated, the projected image is evenly distributed, and the use effect is good. The diameter of the first condensing lens 2 is smaller than that of the second condensing lens 3 . Since the cylindrical surface requires higher precision, the overall precision control area of ​​the cylindrical surface of the first condensing lens 2 is small, so the processing cost is low.

[0037] Preferably, the imaging lens assembly includes a first imaging lens 5, a second imaging lens 6 and a third imaging lens 7 which are arranged in sequence from the optical axis of the light source 1 to the projection side, the end face of the first imaging lens 5 on the light source 1 side is a concave non-spherical surface, the end face of the first imaging lens 5 on the projection side is a convex non-spherical surface, the end face of the second imaging lens 6 on the light source 1 side and the projection side end face are both concave spherical surfaces, the end face of the third imaging lens 7 on the light source 1 side is a concave non-spherical surface, and the end face of the third imaging lens 7 on the projection side is a convex non-spherical surface, and the first imaging lens 5, the second imaging lens 6 and the third imaging lens 7 are used for magnified projection imaging of the image forming component 4. The light sequentially passes through the concave non-spherical surface on the light source 1 side of the first imaging lens 5, the convex non-spherical surface on the projection side of the first imaging lens 5, the concave spherical surface on the light source 1 side of the second imaging lens 6, the concave spherical surface on the projection side of the second imaging lens 6, the concave non-spherical surface on the light source 1 side of the third imaging lens 7 and the convex non-spherical surface on the projection side of the third imaging lens 7. The first imaging lens 5, the second imaging lens 6 and the third imaging lens 7 are combined to refract and magnify the tiny inverted image projected by the image forming component 4 to form an enlarged upright image, thereby forming a clear enlarged upright projection of the graphic on the image forming component 4.

[0038] Preferably, the focal length ratio of the first imaging lens 5, the second imaging lens 6 and the third imaging lens 7 is 1:-1.5:1.5, and the thickness ratio of the first imaging lens 5, the second imaging lens 6 and the third imaging lens 7 is 1:1:1.38. The focal length ratio and thickness ratio between the first imaging lens 5, the second imaging lens 6 and the third imaging lens 7 can enlarge the image projected by the image forming component 4 with a large aspect ratio and perform upright projection, ensuring that the image forming component 4 with a large aspect ratio is clearly projected.

[0039] Preferably, the radius value of the end surface on the light source 1 side of the first imaging lens 5 is 7mm-8mm, the radius value of the end surface on the projection side of the first imaging lens 5 is 4.5mm-5mm, the radius value of the end surface on the light source 1 side of the second imaging lens 6 is 4.5mm-5mm, the radius value of the end surface on the projection side of the second imaging lens 6 is 260mm-270mm, the radius value of the end surface on the light source 1 side of the third imaging lens 7 is 50mm-60mm, and the radius value of the end surface on the projection side of the third imaging lens 7 is 5mm-5.5mm.

[0040] Furthermore, the refractive surface of the lens may be processed by grinding or injection molding, and the lens may be composed of a composite lens in which a plurality of lenses are bonded together.

[0041] The length units of the above lenses are in millimeters, but since the optical system can obtain the same optical performance even if it is proportionally enlarged or proportionally reduced, it is not limited to this. The unit is not limited to millimeters, and other appropriate units may also be used, including but not limited to centimeters, decimeters, meters, etc.

[0042] The specific parameters, MTF and image distortion output of the imaging lens assembly are as described above and will not be repeated here.

[0043] The ground-illuminating light optical lens is composed of a focusing lens assembly and an imaging lens assembly. The focusing lens assembly is composed of two asymmetric first focusing lenses 2 and second focusing lenses 3, which concentrate light along the length direction of the picture, with high light utilization rate to improve the brightness of the picture. The imaging lens assembly is composed of a three-piece first imaging lens 5, a second imaging lens 6 and a third imaging lens 7, and uses the same plastic resin material, with clear imaging. The ground-illuminating light optical lens has a total of five-piece structure, the picture is clear and without deformation, the picture brightness is uniform and the illumination brightness is high.

[0044] The present invention also provides a ground-light optical lens device (not shown), which uses the ground-light optical lens in the above solution. The ground-light optical lens is installed in the ground-light optical lens device, and the ground-light optical lens is connected through a structural member in the device to stabilize the relative position between the lenses.

[0045] In the present invention, Figure 1-Figure 7 As shown, an optical lens system for a ground lighting lamp is provided, comprising a light source 1, a focusing lens assembly, an image forming component 4 for projection, and an imaging lens assembly which are arranged in sequence. The focusing lens assembly and the imaging lens assembly are both arranged on the optical axis of the light source 1. The long side of the image forming component 4 is larger than the wide side. The focusing lens assembly is used to focus the light emitted by the light source 1 along the length direction of the image forming component 4. The imaging lens assembly is used to magnify and project the image of the image forming component 4.

[0046] The optical lens system of the ground-illuminating lamp projects an image on the image-forming component 4 with an aspect ratio greater than 10:1, and illuminates the display screen through the condenser lens assembly, so that the irradiated light is effectively concentrated on the image of the image-forming component 4, and the imaging lens assembly magnifies the image and projects it onto the ground. The vehicle-mounted ground-illuminating lamp adopted in the optical lens system of the ground-illuminating lamp has a unique design, clear imaging, uniform brightness and compact structure.

[0047] Preferably, the light source 1 is a light emitting diode, and the image forming component 4 is a film. The energy conversion rate of the light emitting diode LED is much higher than that of traditional lighting equipment, such as incandescent lamps and fluorescent lamps. This means that under the same lighting effect, the power consumed by the LED is only about 80% of that of the incandescent lamp, which greatly saves energy and reduces carbon emissions. The service life of the LED is extremely long, usually up to 100,000 hours, far exceeding the service life of traditional bulbs. This not only reduces the replacement frequency and cost, but also reduces the environmental waste caused by frequent replacement of bulbs. The light color emitted by the LED is pure and the spectrum range is narrow, making the color more saturated and pure. In addition, the brightness and color can be adjusted through digital control to meet different lighting needs. The LED lamp body is made of epoxy resin material, which has good sealing performance and moisture-proof effect, which enables the LED to work stably in a humid or vibrating environment and is suitable for automobiles in a variety of road conditions.

[0048] The image forming component 4 is a film, and the film can be a film film or a glass film.

[0049] Glass film is preferred, which supports high-definition image and text platemaking and is suitable for scenes requiring high-precision output. This material uses physical direct imaging technology, 100% image transfer, and no chemical reaction, ensuring the accuracy and durability of the image. Glass film is used in a bright room environment, what you see is what you get, with stable performance, long-term effectiveness, and is not affected by environmental factors. Glass film has good light resistance and anti-aging properties, and can maintain long-term stability and clarity.

[0050] Although the embodiments of the present invention are described in detail above, it is obvious to those skilled in the art that various modifications and variations can be made to these embodiments. However, it should be understood that such modifications and variations are within the scope and spirit of the present invention as described in the claims. Moreover, the present invention described herein may have other embodiments and may be implemented or realized in a variety of ways.

Claims

1. An optical lens for ground lighting, characterized in that: include: A condenser lens assembly and an imaging lens assembly are arranged in sequence along the optical axis of the light source to the projection side; The condenser lens assembly collects the light it receives on the image forming component and forms an elliptical focusing spot on the image forming component. The image forming component has a rectangular cross section, and the long axis of the focusing spot is parallel to the long side of the image forming component. The imaging lens assembly is used to magnify the image projected by the image forming component.

2. The optical lens for ground lighting according to claim 1, characterized in that: The condenser lens assembly includes a first condenser lens and a second condenser lens arranged in sequence from the optical axis of the light source to the projection side, one end face of the first condenser lens or the second condenser lens is a cylindrical surface, and the cylindrical surface of the first condenser lens or the second condenser lens is used to form an elliptical focusing spot, and the long axis of the focusing spot is parallel to the long side of the image forming component.

3. The optical lens for ground lighting according to claim 2, characterized in that: The end faces on the light source side and the projection side of the first condensing lens are both spherical surfaces, the end face on the light source side of the second condensing lens is a cylindrical surface, the end face on the projection side of the second condensing lens is a spherical surface, the tangent line between the cylindrical surface and the perpendicular plane of the optical axis is parallel to the long side of the image forming component, the cylindrical surface of the second condensing lens is used to form an elliptical focusing spot, and the long axis of the focusing spot is parallel to the long side of the image forming component.

4. The optical lens for ground lighting according to claim 2, characterized in that: The end face on the light source side of the first condensing lens is a cylindrical surface, the end face on the projection side of the first condensing lens is a spherical surface, the end faces on the light source side and the projection side of the second condensing lens are both spherical surfaces, the tangent line between the cylindrical surface and the perpendicular plane of the optical axis is parallel to the long side of the image forming component, the cylindrical surface of the first condensing lens is used to form an elliptical focusing spot, and the long axis of the focusing spot is parallel to the long side of the image forming component.

5. The optical lens for ground lighting according to claim 3 or 4, characterized in that: The imaging lens assembly includes a first imaging lens, a second imaging lens and a third imaging lens which are arranged in sequence from the optical axis of the light source to the projection side. The light source side end face of the first imaging lens is a concave non-spherical surface, and the projection side end face of the first imaging lens is a convex non-spherical surface. The light source side end face and the projection side end face of the second imaging lens are both concave spherical surfaces. The light source side end face of the third imaging lens is a concave non-spherical surface, and the projection side end face of the third imaging lens is a convex non-spherical surface. The first imaging lens, the second imaging lens and the third imaging lens are used for magnified projection imaging of an image forming component.

6. The optical lens for ground lighting according to claim 5, characterized in that: The focal length ratio of the first imaging lens, the second imaging lens and the third imaging lens is 1:-1.5:1.5, and the thickness ratio of the first imaging lens, the second imaging lens and the third imaging lens is 1:1:1.

38.

7. The optical lens for ground lighting according to claim 5, characterized in that: The radius of the end surface on the light source side of the first imaging lens is 7mm-8mm, the radius of the end surface on the projection side of the first imaging lens is 4.5mm-5mm, the radius of the end surface on the light source side of the second imaging lens is 4.5mm-5mm, the radius of the end surface on the projection side of the second imaging lens is 260mm-270mm, the radius of the end surface on the light source side of the third imaging lens is 50mm-60mm, and the radius of the end surface on the projection side of the third imaging lens is 5mm-5.5mm.

8. An optical lens device for ground lighting, characterized in that: The optical lens for the ground lighting as described in any one of claims 1 to 7 is used.

9. An optical lens system for ground lighting, characterized in that: It includes a light source, a focusing lens assembly, an image forming component for projection and an imaging lens assembly which are arranged in sequence. The focusing lens assembly and the imaging lens assembly are both arranged on the optical axis of the light source. The long side of the image forming component is larger than the wide side. The focusing lens assembly is used to focus the light emitted by the light source along the length direction of the image forming component. The imaging lens assembly is used to magnify the image forming component and project the image.

10. The ground-illuminating light optical lens system according to claim 9, characterized in that: The light source is a light emitting diode, and the image forming component is a film.

Images