Semi-collimating lens with virtual focal line and vehicle lamp
By designing a semi-collimating lens with a virtual focal line, the light control requirements of the headlights in different directions were solved, achieving reasonable distribution and efficient utilization of light, and improving the illumination uniformity and luminous efficiency of the headlights.
Patent Information
- Application Number
- CN202423214420.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-24
AI Technical Summary
Existing headlights are unable to simultaneously meet the light control requirements in the up and down and left and right directions, resulting in reduced lighting efficiency and increased costs.
By employing a semi-collimating lens with a virtual focal line, and by designing the light-incident and light-outcident surface structures of the lens body, light rays are concentrated in the direction where collimation and light collection are required, and the virtual focal point characteristic is used to achieve uniform light diffusion in the direction of diffused light.
It achieves reasonable distribution and efficient utilization of light in different directions, maintains high luminous efficiency, and improves the uniformity of vehicle headlight illumination and light utilization efficiency.
Smart Images
Figure CN223484031U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive lighting technology, and in particular to a semi-collimating lens with a virtual focal line and an automotive lamp. Background Technology
[0002] With the continuous advancement of the automotive industry and the increasing demands of consumers for automotive aesthetics and safety performance, automotive lighting technology has also experienced rapid development. As a crucial component of automobiles, headlights not only fulfill the basic functions of illumination and signal transmission but have also gradually become important elements in showcasing automotive design style and brand characteristics. Therefore, the diversification of headlight shapes, the uniformity of illumination effects, and overall aesthetics have become critical issues that suppliers and designers urgently need to address.
[0003] In traditional automotive lighting projects, solutions for achieving uniform illumination are mostly direct or reflective. These solutions require careful consideration of regulatory requirements and light uniformity during design to ensure the lights provide drivers with clear visibility at night or in adverse weather conditions, while also meeting road safety standards. To achieve uniform illumination, existing technologies typically increase the number of light diffusion cycles, but this often leads to reduced luminous efficiency and increased costs.
[0004] Furthermore, traditional vehicle headlights have certain limitations in their functional design. For example, the light intensity requirements for the left and right viewing angles are usually higher to meet the lighting needs when turning or changing lanes; while the light intensity requirements for the up and down viewing angles are relatively lower, mainly used for low beam lighting. However, conventional optical structures (such as circular condensers and circular lenses, which can usually only control light in both up and down and left and right directions) often cannot meet the light control needs in both directions at the same time, resulting in limited headlight performance. Utility Model Content
[0005] The technical problem to be solved by this utility model is: in order to solve the technical problem that it is difficult to simultaneously meet the light control requirements in both the up and down and left and right directions in the existing technology, this utility model provides a semi-collimating lens and vehicle lamp with a virtual focal line, which can solve the problem of controlling the light requirements in two directions separately, and can achieve the effect of collimating and receiving light in one direction and diffusing light in the other direction.
[0006] The technical solution adopted by this utility model to solve its technical problem is: a semi-collimating lens with a virtual focal line, comprising: a lens body, the two ends of which are a light-emitting end and a light-incident end, the light-emitting end including a light-emitting surface, a light source disposed below the light-incident end, and the light-incident end having a concave cavity with an opening facing the light source.
[0007] The top of the cavity is formed as a first light-incident surface, and a portion of the light emitted by the light source is refracted through the first light-incident surface and then emitted from the light-out surface.
[0008] The side of the cavity is formed as a second light-incident surface, and a third light-incident surface is formed on the outer side of the second light-incident surface in the horizontal direction. Another part of the light emitted by the light source is refracted by the second light-incident surface and reaches the third light-incident surface. After total internal reflection by the third light-incident surface, it is emitted from the light-out surface.
[0009] in:
[0010] The first incident light surface has a real focal point F1 on the projection outline of the vertical plane. The focal point of the light source coincides with the real focal point F1. The light emitting surface has a virtual focal point F2 on the projection outline of the vertical plane. The virtual focal point F2 is located below the real focal point F1. The backward extensions of the emitted light rays after being refracted by the light emitting surface converge at the virtual focal point F2.
[0011] The specific technical effect is as follows: the first light-incident surface is located at the top of the concave cavity, the second light-incident surface is located on the side of the first light-incident surface, and the third light-incident surface is located outside the second light-incident surface. This allows the light to form a more concentrated beam in the direction where collimation and light collection are required. Then, by utilizing the characteristics of the virtual focal point, the backward extension of the outgoing light after refraction through the light-exiting surface converges at the virtual focal point F2. Therefore, the light emitted from the light-exiting surface is diffused, and uniform light diffusion is achieved in the direction where diffused light is required. By adopting this structural design at the light-incident end, the headlight can meet the light control requirements in different directions while maintaining high luminous efficiency, realizing reasonable distribution and efficient utilization of light, thereby achieving a more uniform lighting effect.
[0012] Furthermore, the projection contour line of the first light-incident surface in the vertical plane is parallel to the projection contour line of the light-exiting surface in the vertical plane.
[0013] The specific technical effect is that the backward extensions of the emitted light rays after refraction by the light-emitting surface converge at the virtual focal point F2.
[0014] Furthermore, the first incident surface is a freeform surface.
[0015] The specific technical effect is: to form a more concentrated beam of light in the direction where collimation and light collection are needed, and to diffuse the light in the direction where diffusion is needed.
[0016] Furthermore, the light-emitting surface is a freeform surface.
[0017] The specific technical effect is that the backward extension of the emitted light rays after refraction by the light-emitting surface converges at the virtual focal point F2, thereby improving efficiency.
[0018] Furthermore, at least one of the first light-incident surface, the second light-incident surface, the third light-incident surface, and the light-emitting surface is provided with a light distribution pattern or texture.
[0019] The specific technical effect is that the light distribution pattern or texture can change the shape and texture of the surface, making the light distribution in space more uniform and resulting in better illumination uniformity.
[0020] Furthermore, it also includes a reflector, which is disposed above the lens body and close to the light-emitting surface.
[0021] Furthermore, the inner surface of the reflector facing the light-emitting surface is plated with aluminum.
[0022] The specific technical effect is that aluminum plating on the inner surface of the reflector can further enhance its reflection effect, allowing more light to be effectively reflected, thereby improving the reflection efficiency.
[0023] Furthermore, the inner surface of the reflector facing the light-emitting surface is provided with a light distribution pattern or texture.
[0024] The specific technical effect is that the light is more evenly distributed in space after being reflected by the mirror, resulting in better lighting uniformity.
[0025] Furthermore, the number of lens bodies is multiple.
[0026] The specific technical effect is that the number and arrangement of the lens bodies can be adjusted and changed according to actual usage requirements.
[0027] A vehicle headlight, comprising a semi-collimating lens with a virtual focal line as described in any of the preceding claims.
[0028] Compared with the prior art, the beneficial effects of the present invention are:
[0029] (1) In this utility model, the first light-incident surface is located at the top of the concave cavity, the second light-incident surface is located on the side of the first light-incident surface, and the third light-incident surface is located outside the second light-incident surface, so that the light beam is formed in a more concentrated beam in the direction that needs to be collimated and collected.
[0030] (2) This utility model makes use of the characteristics of the virtual focal point. The backward extension of the light rays after being refracted by the light-emitting surface converges at the virtual focal point F2. Therefore, the light rays emitted from the light-emitting surface are in a diffused state. In the direction where the light needs to be diffused, the light rays are evenly diffused. By adopting this structural design at the light-inlet end, the car lamp can meet the light control requirements in different directions while maintaining high light efficiency. It realizes the reasonable distribution and efficient utilization of light, thereby achieving a more uniform lighting effect. Attached Figure Description
[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0032] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;
[0033] Figure 2 for Figure 1 The main view;
[0034] Figure 3 for Figure 1 A bottom view;
[0035] Figure 4 for Figure 1 Top view;
[0036] Figure 5 for Figure 3 Schematic diagram of the cross-sectional structure of the middle AA section;
[0037] Figure 6 for Figure 3 Schematic diagram of the cross-sectional structure of the middle BB section;
[0038] Figure 7 This is a schematic diagram of the connection structure of the first light-incident surface, the second light-incident surface, and the third light-incident surface;
[0039] Figure 8 This is a structural schematic diagram of Embodiment 2 of the present invention.
[0040] In the diagram: 1. Lens body; 101. Light-emitting surface; 102. Cavity; 103. First light-incident surface; 104. Second light-incident surface; 105. Third light-incident surface; 2. Light source; 3. Reflector. Detailed Implementation
[0041] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.
[0042] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0043] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0044] like Figures 1 to 7 The image shows a preferred embodiment of the present invention, a semi-collimating lens with a virtual focal line, comprising a lens body 1, with a light-emitting end and a light-incident end at its two ends, respectively. The light-emitting end includes a light-emitting surface 101, and a light source 2 is disposed below the light-incident end. The light-incident end has a concave cavity 102 with an opening facing the light source 2. The top of the concave cavity 102 is formed as a first light-incident surface 103. A portion of the light emitted by the light source 2 is refracted through the first light-incident surface 103 and then emitted from the light-emitting surface 101. The side of the concave cavity 102 is formed as a second light-incident surface 104, and a third light-incident surface 105 is formed on the outer side of the second light-incident surface 104 in the horizontal direction. Another portion of the light emitted by the light source 2 is refracted through the second light-incident surface 104 and reaches the third light-incident surface 105. After total internal reflection by the third light-incident surface 105, it is emitted from the light-emitting surface 101.
[0045] in:
[0046] The projection outline of the first light-incident surface 103 on the vertical plane has a real focal point F1. The focal point of the light source 2 is set to coincide with the real focal point F1. The projection outline of the light-exiting surface 101 on the vertical plane has a virtual focal point F2. The virtual focal point F2 is located below the real focal point F1. The backward extensions of the outgoing light rays after being refracted by the light-exiting surface 101 converge at the virtual focal point F2.
[0047] Therefore, the first light-incident surface 103 is located at the top of the concave cavity 102, the second light-incident surface 104 is located on the side of the first light-incident surface 103, and the third light-incident surface 105 is located outside the second light-incident surface 104. This allows the light to form a more concentrated beam in the direction where collimation and light collection are required. Then, by utilizing the characteristics of the virtual focal point, the backward extension of the emitted light after refraction by the light-emitting surface 101 converges at the virtual focal point F2. Thus, the light emitted from the light-emitting surface 101 is diffused, and uniform light diffusion is achieved in the direction where diffused light is required. By adopting this structural design at the light-incident end, the vehicle headlight can meet the light control requirements in different directions while maintaining high luminous efficiency, achieving reasonable distribution and efficient utilization of light, thereby achieving a more uniform lighting effect.
[0048] For details, see Figure 5As shown, this figure is the projection of the first light-incident surface 103, the third light-incident surface 105, and the light-exit surface 101 onto a vertical plane.
[0049] In other words, a portion of the light emitted from the focal point F1 of the light source 2 is refracted by the first incident surface 103 and then exits from the exiting surface 101. The direction of the light path in the vertical plane is as follows: Figure 5 As shown, the backward extensions of the emitted light rays after refraction through the light-emitting surface 101 converge at the virtual focal point F2. Therefore, in Figure 5 The light diffuses in the left and right directions, so it can achieve uniform light diffusion in special working conditions where light diffusion is required.
[0050] For details, see Figure 6 As shown, the figure is a projection of the first light-incident surface 103, the second light-incident surface 104, the third light-incident surface 105, and the light-exit surface 101 in the horizontal direction.
[0051] In other words, a portion of the light emitted from the focal point F1 of the light source 2 is refracted by the first incident surface 103 and then exits from the exiting surface 101. The light path on the horizontal plane is as follows: Figure 6 As shown, after refraction at the first incident surface 103, the light is collimated and exits from the exit surface 101. Another portion of the light emitted from the focal point F1 of the light source 2 is refracted at the second incident surface 104 and reaches the third incident surface 105. After reflection at the third incident surface 105, it is collimated and exits from the exit surface 101. Therefore, in… Figure 6 The light rays are parallel in the left and right directions and collimated in the up and down directions. Therefore, in special working conditions, it is necessary to form a more concentrated beam in the collimated light receiving direction.
[0052] It is worth noting that, due to Figure 5 If only a single vertical plane is used to cut the lens body 1, then only one virtual focal point F2 exists in that plane. However, if multiple planes parallel to the vertical plane are used to cut the lens body 1, then each vertical plane will contain a virtual focal point F2. Connecting multiple virtual focal points F2 sequentially forms a virtual focal line. (See [reference]). Figure 6 As shown.
[0053] In this embodiment, the projection contour line of the first light-incident surface 103 in the vertical plane is parallel to the projection contour line of the light-exiting surface 101 in the vertical plane.
[0054] In this embodiment, the first light-incident surface 103 is a freeform surface.
[0055] In this embodiment, the light-emitting surface 101 is a freeform surface.
[0056] In this embodiment, at least one of the first light-incident surface 103, the second light-incident surface 104, the third light-incident surface 105, and the light-emitting surface 101 is provided with a light distribution pattern or texture.
[0057] Therefore, light distribution patterns or textures can make the light distribution in space more uniform by changing the shape and texture of the surface, resulting in better illumination uniformity.
[0058] In this embodiment, there are multiple lens bodies 1.
[0059] Therefore, the number and arrangement of lens bodies 1 are adjusted and changed according to actual usage requirements.
[0060] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention.
[0061] Based on the above, this utility model also has the following embodiments:
[0062] Example 2:
[0063] like Figure 8 As shown,
[0064] The difference from Example 1 is that:
[0065] In this embodiment, a reflector 3 is also included, which is disposed above the lens body 1 and close to the light-emitting surface 101.
[0066] In this embodiment, the inner surface of the reflector 3 facing the light-emitting surface 101 is plated with aluminum.
[0067] Therefore, aluminum plating on the inner surface of mirror 3 can further enhance its reflection effect, allowing more light to be effectively reflected, thereby improving the reflection efficiency.
[0068] In this embodiment, the inner surface of the reflector 3 facing the light-emitting surface 101 is provided with a light distribution pattern or texture.
[0069] Therefore, the light is more evenly distributed in space after being reflected by mirror 3, resulting in better illumination uniformity.
[0070] Based on the above, this utility model also has the following embodiments:
[0071] Example 3:
[0072] A vehicle headlight, comprising a semi-collimating lens having a virtual focal line, as described in any of the preceding claims.
[0073] Compared with the prior art, the beneficial effects of the present invention are:
[0074] (1) In this utility model, the first light-incident surface 103 is located at the top of the cavity 102, the second light-incident surface 104 is located on the side of the first light-incident surface 103, and the third light-incident surface 105 is located outside the second light-incident surface 104, so that the light beam is formed in a more concentrated beam in the direction that needs to be collimated and collected.
[0075] (2) This utility model makes use of the characteristics of the virtual focal point. The backward extension of the light rays after being refracted by the light-emitting surface 101 converges at the virtual focal point F2. Therefore, the light rays emitted from the light-emitting surface 101 are in a diffused state. In the direction where the light needs to be diffused, the light rays are evenly diffused. By adopting this structural design at the light-inlet end, the vehicle lamp can meet the light control requirements in different directions while maintaining high light efficiency. This achieves reasonable distribution and efficient utilization of light, thereby achieving a more uniform lighting effect.
[0076] The above description is based on the preferred embodiments of this utility model. Through the above description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined by the scope of the claims.
Claims
1. A semi-collimating lens with a virtual focal line, characterized in that, include: A lens body (1) has a light-emitting end and a light-incident end at its two ends, respectively. The light-emitting end includes a light-emitting surface (101). A light source (2) is disposed below the light-incident end. The light-incident end has a cavity (102) with an opening facing the light source (2). The top of the cavity (102) is formed as a first light-incident surface (103), and a portion of the light emitted by the light source (2) is refracted through the first light-incident surface (103) and then emitted from the light-out surface (101). The side of the cavity (102) is formed as a second light-incident surface (104), and a third light-incident surface (105) is formed on the outer side of the second light-incident surface (104) in the horizontal direction. Another part of the light emitted by the light source (2) is refracted by the second light-incident surface (104) and reaches the third light-incident surface (105). After total internal reflection by the third light-incident surface (105), it is emitted from the light-out surface (101). in: The first light-incident surface (103) has a real focal point F1 on the projection outline of the vertical plane. The focal point of the light source (2) coincides with the real focal point F1. The light-exiting surface (101) has a virtual focal point F2 on the projection outline of the vertical plane. The virtual focal point F2 is located below the real focal point F1. The backward extension of the outgoing light rays after being refracted by the light-exiting surface (101) converges at the virtual focal point F2.
2. A semi-collimating lens with a virtual focal line as described in claim 1, characterized in that, The projection profile of the first light-incident surface (103) in the vertical plane is parallel to the projection profile of the light-exiting surface (101) in the vertical plane.
3. A semi-collimating lens with a virtual focal line as described in claim 1, characterized in that, The first incident surface (103) is a freeform surface.
4. A semi-collimating lens with a virtual focal line as described in claim 1, characterized in that, The light-emitting surface (101) is a freeform surface.
5. A semi-collimating lens with a virtual focal line as described in claim 1, characterized in that, At least one of the first light-incident surface (103), the second light-incident surface (104), the third light-incident surface (105), and the light-emitting surface (101) is provided with a light distribution pattern or texture.
6. A semi-collimating lens with a virtual focal line as described in claim 1, characterized in that, Also includes: A reflector (3) is disposed above the lens body (1) and close to the light-emitting surface (101).
7. A semi-collimating lens with a virtual focal line as described in claim 6, characterized in that, The reflector (3) is plated with aluminum on the inner surface facing the light-emitting surface (101).
8. A semi-collimating lens with a virtual focal line as described in claim 6, characterized in that, The inner surface of the reflector (3) facing the light-emitting surface (101) is provided with a light distribution pattern or texture.
9. A semi-collimating lens with a virtual focal line as described in claim 1, characterized in that, The number of lens bodies (1) is multiple.
10. A vehicle light, characterized in that, Includes a semi-collimating lens with a virtual focal line as described in any one of claims 1 to 9.