Optical element, vehicle lamp and vehicle
By designing an optical element including an incoming hole, a collimated incident surface and a reflection surface, combined with an optical fiber mounting part, the softening deformation and light loss caused by the heat of the light source in automotive lighting is solved, and high-efficiency optical fiber is achieved Output, simplifying the structure and reducing costs.
Patent Information
- Application Number
- CN202421082047.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-17
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-17
AI Technical Summary
The application of optical fiber in automotive lighting has problems such as softening deformation caused by heat from the luminous source, short distance requirements for the transmitting and receiving end of the light, increasing the complexity and space occupation of optical components, and large assembly tolerances, making it difficult to achieve high efficiency of optical fiber light output.
Design an optical element, including the diffused incident surface and collimated incident surface of the incoming hole, for connecting to the light source, combining the optical fiber mounting part, optimize the combination of the optical fiber and the light source, reduce assembly difficulty, and improve the output of light through the reflective surface efficiency.
High-efficiency output of high-power LED light sources and optical fibers is achieved, the light output efficiency of small-aperture optical fibers is improved, the structure is simplified, the volume is reduced, and the cost is reduced.
Smart Images
Figure CN222256197U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vehicles, and more specifically to an optical element, a vehicle lamp and a vehicle. Background Art
[0002] With the advancement of science and technology and the improvement of people's living standards, cars have become an indispensable means of transportation in daily life. As an important part of automobile safety performance, automobile lighting has developed from simple nighttime lighting to a necessity that requires beautiful design, high safety, intelligence, comfort, energy saving and environmental protection. In this context, optical fiber, as a new type of optical transmission medium, is widely used in communication, lighting and sensing technology due to its advantages such as non-conductivity, light weight, large capacity, high temperature resistance and electromagnetic radiation resistance, good flexibility and convenience. In the past decade, the application of optical fiber technology in automobile lighting has become a research topic and has been put into practical use on some car models.
[0003] However, the application of fiber optic technology in automotive lighting also has some disadvantages:
[0004] 1. The power of the light source is limited. When using a high-power light source, the heat emitted by the light source may cause the light input end of the optical fiber to soften and deform.
[0005] 2. The distance between the light transmitting end (light source) and the receiving end (optical fiber light input end) needs to be kept short. Since the light emitted by Lambert light source or halogen light source is divergent, although most of the light can enter the optical fiber within a short distance, some of the light will still be lost outside the optical fiber, and the light loss will become more serious as the distance increases.
[0006] 3. Adding optical components between the transmitting and receiving ends of the light will increase the complexity of the system, and these optical components are usually composed of multiple optical elements, which occupy a large space as a whole.
[0007] 4. Both optical components and optical fibers require independent structures to fix and determine their positions, which results in larger assembly tolerances during the assembly process.
[0008] Therefore, how to achieve high-efficiency light extraction from optical fibers has become a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content
[0009] In view of this, an object of the present invention is to provide an optical element to achieve high-efficiency light extraction of an optical fiber.
[0010] Another object of the present invention is to provide a vehicle lamp comprising the above optical element.
[0011] Another object of the present utility model is to provide a vehicle comprising the above-mentioned vehicle lamp.
[0012] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0013] An optical element is used to be arranged between a light source and an optical fiber, wherein a light entrance hole opposite to the light source is provided at a first end of the optical element, a side wall of the light entrance hole is a diffusion incident surface for allowing light to pass through, a bottom wall of the light entrance hole is a collimating incident surface for allowing light to pass through and collimating the light, an outer peripheral wall of the optical element is a reflecting surface for reflecting light toward a second end of the optical element, and an optical fiber mounting portion for connecting to the optical fiber is provided at the second end of the optical element.
[0014] Optionally, in the above-mentioned optical element, the optical fiber mounting portion is a mounting hole for embedding the light incident end of the optical fiber, the bottom wall of the mounting hole is a light emitting surface opposite to the light incident surface of the optical fiber and emitting light, and the reflecting surface is used to reflect light toward the light emitting surface.
[0015] Optionally, in the above optical element, the area of the light emitting surface is not greater than the area of the light incident surface of the optical fiber; and / or,
[0016] The opening end of the mounting hole is a guide cone hole structure for introducing the optical fiber.
[0017] Optionally, in the above-mentioned optical element, the mounting hole is a stepped hole with its opening facing away from the light entrance hole, and the small diameter end of the stepped hole is closer to the light entrance hole than the large diameter end, the bottom surface of the small diameter end of the stepped hole serves as the light exit surface, the large diameter end of the stepped hole is used for embedding the light entrance end of the optical fiber, and the bottom surface of the large diameter end of the stepped hole is used for abutting and positioning with the light entrance end of the optical fiber; and / or,
[0018] The collimating incident surface is opposite to the light emitting surface, and an area of the collimating incident surface is not greater than an area of the light emitting surface.
[0019] Optionally, in the above-mentioned optical element, an equatorial region is formed between the first end and the second end of the optical element, and the outer diameter of the optical element gradually increases in the direction from the first end of the optical element to the equatorial region, and the outer diameter of the optical element gradually decreases in the direction from the equatorial region to the second end of the optical element.
[0020] Optionally, in the above-mentioned optical element, along the direction from the first end of the optical element to the equatorial region, the outer wall of the optical element transitions in an outwardly convex arc shape, and along the direction from the equatorial region to the second end of the optical element, the outer wall of the optical element transitions in a straight line shape.
[0021] Optionally, in the above optical element, a fixing portion for fixing to a lamp housing is provided on an outer peripheral wall of the optical element, and the fixing portion is located between the equatorial region and the second end of the optical element.
[0022] Optionally, in the above optical element, the fixing portion and the optical element are an integrated structure; and / or,
[0023] The fixing portion is provided with an external thread or a connecting hole for connecting with the lamp housing.
[0024] A vehicle lamp comprises the above-mentioned optical element, a light source and an optical fiber, wherein the light source faces the light entrance hole, and the optical fiber is connected to the optical fiber mounting portion.
[0025] A vehicle comprises the above-mentioned vehicle lamp.
[0026] The optical element provided by the utility model is used to be arranged between a light source and an optical fiber. A light entrance hole for facing the light source and receiving light is provided at the first end of the optical element. The side wall of the light entrance hole is a diffusion incident surface for allowing light to pass through. The bottom wall of the light entrance hole is a collimating incident surface for allowing light to pass through and collimating the light. The outer peripheral wall of the optical element is a reflecting surface for reflecting light to the second end of the optical element. The second end of the optical element is provided with an optical fiber installation portion for connecting to the optical fiber. The provision of the optical fiber installation portion reduces the difficulty of assembling the optical element and the optical fiber.
[0027] The light emitted by the light source is emitted into the light entrance hole, wherein the light incident on the diffuse incident surface is reflected by the reflective surface, then emitted from the second end of the optical element and enters the optical fiber, and the light incident on the collimated incident surface is collimated by the collimated incident surface, then directly emitted from the second end of the optical element and enters the optical fiber.
[0028] Compared with the prior art, the optical element provided by the utility model can combine a high-power LED light source with an optical fiber to achieve an optical effect of high-efficiency output, improve the light output efficiency of small-aperture optical fibers, and enable it to be applied to the lighting of automotive position lights. In addition, the optical element also has the advantages of simple structure, small size, and low cost.
[0029] The vehicle lamp and vehicle disclosed in the utility model include the above-mentioned optical element, so they also have the above-mentioned structure and beneficial effects. Other structures refer to the prior art and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0031] Figure 1 A schematic diagram of the relative positions of the optical element, the light source and the optical fiber disclosed in the embodiment of the utility model;
[0032] Figure 2 A schematic diagram of the relative positions of the optical element and the light source disclosed in the embodiment of the utility model;
[0033] Figure 3 A light path diagram of an optical element disclosed in an embodiment of the utility model;
[0034] Figure 4 The invention discloses a light emitting simulation scheme combining the optical element disclosed in the utility model with other optical elements, a light source and an optical fiber.
[0035] Among them, 1 is a light source, 2 is a diffuse incident surface, 3 is a collimated incident surface, 4 is a first reflection surface, 5 is a second reflection surface, 6 is an optical fiber installation part, 7 is a fixing part, and 8 is an optical fiber. DETAILED DESCRIPTION
[0036] The core of the utility model is to disclose an optical element to achieve high-efficiency light output of an optical fiber.
[0037] Another core of the utility model is to disclose a vehicle lamp comprising the above optical element.
[0038] Another core of the utility model is to disclose a vehicle comprising the above-mentioned vehicle lamp.
[0039] The following is an explanation of the embodiments with reference to the accompanying drawings. In addition, the embodiments shown below do not limit the contents of the utility model described in the claims. In addition, the entire contents of the structures represented by the following embodiments are not limited to those necessary as solutions of the utility model described in the claims. It should be noted that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings. In the absence of conflict, the embodiments in the utility model and the features in the embodiments can be combined with each other.
[0040] Combination Figure 1 and Figure 2The optical element disclosed in the utility model is used to be arranged between a light source 1 and an optical fiber 8. A light entrance hole for facing the light source 1 and receiving light is opened at the first end of the optical element. The side wall of the light entrance hole is a diffusion incident surface 2 for allowing light to pass through. The bottom wall of the light entrance hole is a collimating incident surface 3 for allowing light to pass through and collimating the light. The outer peripheral wall of the optical element is a reflecting surface for reflecting light to the second end of the optical element, and the second end of the optical element is provided with a fiber optic mounting portion 6 for connecting to the optical fiber 8. The setting of the fiber optic mounting portion 6 reduces the difficulty of assembling the optical element and the optical fiber 8.
[0041] Combination Figure 3 The light emitted by the light source 1 is emitted and enters the light entrance hole, wherein the light incident on the diffuse incident surface 2 is reflected by the reflective surface, and then emitted from the second end of the optical element and enters the optical fiber 8, and the light incident on the collimated incident surface 3 is collimated by the collimated incident surface 3, and then directly emitted from the second end of the optical element and enters the optical fiber 8.
[0042] The optical element disclosed in the utility model can combine a high-power LED light source 1 with an optical fiber 8 to achieve an optical effect of high-efficiency output, improve the light output efficiency of the small-aperture optical fiber 8, and enable it to be applied to the lighting of automotive position lights. In addition, the optical element also has the advantages of simple structure, small size and low cost.
[0043] Combination Figure 1 The optical fiber installation portion 6 may specifically be an installation hole structure for the light input end of the optical fiber 8 to be embedded.
[0044] Furthermore, in order to facilitate the installation of the optical fiber 8, the opening end of the installation hole can be a guide cone hole structure for introducing the optical fiber 8, that is, the aperture of the guide cone hole structure gradually expands from the first end to the second end of the optical element.
[0045] Since the bottom wall of the above-mentioned mounting hole is opposite to the light incident surface of the light incident end of the optical fiber 8, the bottom wall of the mounting hole can be directly used as the light emitting surface of the optical element, that is, the above-mentioned reflecting surface is used to reflect light toward the light emitting surface. In order to ensure the light emitting efficiency, the area of the light emitting surface is less than or equal to the area of the light incident surface of the optical fiber 8 to ensure the transmission effect of light from the optical element to the optical fiber 8.
[0046] Correspondingly, the collimating incident surface 3 is opposite to the light emitting surface, and the area of the collimating incident surface 3 is not larger than the area of the light emitting surface, so that the light collimated by the collimating incident surface 3 can be directly emitted from the light emitting surface and enter the optical fiber 8 without being reflected by the reflecting surface.
[0047] It can be understood that since the above-mentioned mounting hole has the functions of both embedding the light incident end of the optical fiber 8 and emitting light as a light emitting surface, in order to simultaneously meet the conditions that the mounting hole can be embedded in the optical fiber 8 and its bottom surface area is smaller than the light incident surface of the optical fiber 8, the mounting hole can be set as a step hole structure, the opening end of the step hole is away from the light incident hole, and its small diameter end is closer to the light incident hole than the large diameter end, the aperture of the large aperture end of the step hole corresponds to the outer diameter of the optical fiber 8, and is used for embedding the light incident end of the optical fiber 8, the aperture of the small aperture end is smaller than the outer diameter of the optical fiber 8, the bottom surface of the small aperture end is used to emit light as the above-mentioned light emitting surface, and the step surface of the step hole (that is, the bottom surface of the large aperture end) is used to abut and position with the light incident surface of the optical fiber 8.
[0048] It should be noted that the axial dimension of the small aperture end of the step hole structure is designed to be as short as possible to minimize the distance between the light output surface and the light input surface of the optical fiber 8 to ensure the transmission efficiency of light from the optical element to the optical fiber 8.
[0049] Combination Figure 2 , it is defined that an equatorial region is formed between the first end and the second end of the optical element, then the outer diameter of the optical element gradually increases in the direction from the first end of the optical element to the equatorial region to achieve light convergence; and the outer diameter of the optical element gradually decreases in the direction from the equatorial region to the second end of the optical element to achieve concentrated emission of light to the light exit surface.
[0050] A further optimized solution is that, in the direction from the first end of the optical element to the equatorial region, the outer wall of the optical element transitions to an arc-shaped structure that protrudes outward (away from the axial direction of the optical element), and this part of the optical element (corresponding to the first reflection surface 4) plays the function of collecting and reflecting light. This arc-shaped structure design is beneficial to the light collection and convergence effect; in the direction from the equatorial region to the second end of the optical element, the outer wall of the optical element transitions to a straight line, and this part of the optical element (corresponding to the second reflection surface 5) does not need to collect light but only needs to reflect light, so the reflection surface with a straight line transition can be directly used to reflect light.
[0051] In order to efficiently utilize the divergent light of the LED light source 1, the aperture (light incident area) of the light incident end of the light incident hole must be larger than the light exit surface (light exit area) of the light source 1, and the inclination angle of the diffuse incident surface 2 relative to the collimated incident surface 3 can be adjusted according to parameters such as the distance between the light source 1 and the light incident hole. The specific structure of the collimated incident surface 3 is prior art and will not be described in detail here.
[0052] The specific shape design of the reflective surface can be adjusted according to parameters such as the light diffusion angle (determining the propagation position of the effective light), the manufacturing material of the optical element (refractive index of the optically dense medium), etc.
[0053] In order to facilitate the fixation of the optical element in the lamp housing, Figure 1 A fixing portion 7 is provided on the outer peripheral wall of the optical element, and the fixing portion 7 is located between the equatorial region and the second end of the optical element. The fixing portion 7 is provided on the outer wall of the optical element with a straight transition, which makes the production and installation of the fixing portion 7 more convenient.
[0054] Specifically, the fixing portion 7 may be a block-shaped protrusion structure or an annular protrusion structure, and may be provided with an external thread structure for connecting the lamp housing or a connection hole structure for bolts, positioning columns and other components to pass through and position.
[0055] The fixing portion 7 and the optical element may also be an integrated structure, which is convenient for preparation by an integrated molding method.
[0056] Combination Figure 4 Taking the output power of light source 1 (led) as 50lm as an example, the following table (Table 1) compares the output results of the optical element disclosed in the utility model and several optical elements in the prior art after optical simulation is performed on the combination of the optical element with the light source and the optical fiber.
[0057] Table 1 Optical simulation test table
[0058]
[0059] Option 0 is a lighting scheme in which light source 1 directly emits light to optical fiber 8, and Options 1, 2, 3, and 5 correspond to Figure 4 Several conventional solutions of combining a focusing device with a light source 1 to emit light to an optical fiber 8 are shown in the figure, and Option 4 is a solution of combining an optical element and a light source 1 disclosed in the present invention to emit light to an optical fiber 8. It can be seen from the above table that the combination of the optical element and the light source 1 disclosed in the present invention has the highest output efficiency, and is much higher than other solutions, indicating that the optical element disclosed in the present invention can effectively improve the combined light output efficiency of the light source 1 and the optical fiber 8.
[0060] The vehicle lamp disclosed in the utility model includes the above-mentioned optical element, light source 1 and optical fiber 8. The light source 1 is arranged toward the light entrance hole, and the optical fiber 8 is connected to the optical fiber mounting portion 6. The arrangement of the optical element can separate the light source 1 and the optical fiber 8 to prevent the light entrance end of the optical fiber 8 from softening and deforming due to high temperature. Since it has the above-mentioned optical element, it also has the above-mentioned structure and beneficial effects. Other structures refer to the prior art and are not described here. The vehicle lamp disclosed in the utility model can achieve high-efficiency, high-power, and high-brightness position lamp lighting effects.
[0061] The vehicle disclosed in the utility model includes the above-mentioned headlights, so it also has the above-mentioned structure and beneficial effects. Other structures refer to the prior art and will not be described in detail here.
[0062] The above description of the disclosed embodiments enables professionals and technicians in the field to implement or use the utility model. Various modifications to these embodiments will be obvious to professionals and technicians in the field, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. The specific technical means in some embodiments can be combined in part or in whole into another embodiment without being explicitly excluded by another embodiment. Therefore, the utility model will not be limited to the embodiments shown in this article, but will conform to the widest range consistent with the principles and novel features disclosed herein.
Claims
1. An optical element, arranged between a light source (1) and an optical fiber (8), characterized in that: The first end of the optical element is provided with a light entrance hole for being opposite to the light source (1); the side wall of the light entrance hole is a diffusion incident surface (2) for allowing light to pass through; the bottom wall of the light entrance hole is a collimating incident surface (3) for allowing light to pass through and collimating the light; the outer peripheral wall of the optical element is a reflecting surface for reflecting light toward the second end of the optical element; and the second end of the optical element is provided with an optical fiber mounting portion (6) for connecting to the optical fiber (8).
2. The optical element according to claim 1, wherein The optical fiber mounting portion (6) is a mounting hole for embedding the light input end of the optical fiber (8), the bottom wall of the mounting hole is a light output surface for being opposite to the light input surface of the optical fiber (8) and for outputting light, and the reflection surface is used to reflect light toward the light output surface.
3. The optical element according to claim 2, wherein: The area of the light exiting surface is not greater than the area of the light incident surface of the optical fiber (8); and / or, The opening end of the mounting hole is a guide cone hole structure for introducing the optical fiber (8).
4. The optical element according to claim 3, wherein The mounting hole is a stepped hole with its opening facing away from the light entrance hole, and the small diameter end of the stepped hole is closer to the light entrance hole than the large diameter end, the bottom surface of the small diameter end of the stepped hole serves as the light exit surface, the large diameter end of the stepped hole is used for the light entrance end of the optical fiber (8) to be embedded, and the bottom surface of the large diameter end of the stepped hole is used for abutting and positioning with the light entrance end of the optical fiber (8); and / or, The collimating incident surface (3) is opposite to the light emitting surface, and the area of the collimating incident surface (3) is not greater than the area of the light emitting surface.
5. The optical element according to claim 1, wherein An equatorial region is formed between the first end and the second end of the optical element. The outer diameter of the optical element gradually increases in a direction from the first end of the optical element to the equatorial region, and the outer diameter of the optical element gradually decreases in a direction from the equatorial region to the second end of the optical element.
6. The optical element according to claim 5, wherein: In the direction from the first end of the optical element to the equatorial region, the outer wall of the optical element transitions in an outwardly convex arc shape, and in the direction from the equatorial region to the second end of the optical element, the outer wall of the optical element transitions in a straight line shape.
7. The optical element according to claim 6, wherein: A fixing portion (7) for fixing to a lamp housing is provided on the outer peripheral wall of the optical element, and the fixing portion (7) is located between the equatorial region and the second end of the optical element.
8. The optical element according to claim 7, wherein: The fixing portion (7) and the optical element are an integrated structure; and / or, The fixing portion (7) is provided with an external thread or a connection hole for connecting with the lamp housing.
9. A vehicle lamp, characterized in that: It comprises the optical element according to any one of claims 1 to 8, a light source (1) and an optical fiber (8), wherein the light source (1) faces the light entrance hole, and the optical fiber (8) is connected to the optical fiber mounting portion (6).
10. A vehicle, characterized in that: Comprising the vehicle light as claimed in claim 9.