Optical system suitable for rear fog lamp and vehicle lamp
By using a combination of the first refractive unit and the second refractive unit in the rear fog lamp optical system, the problems of uniformity and high cost of the optical scheme in the prior art are solved, and low-cost optical pattern imaging is achieved.
Patent Information
- Application Number
- CN202422712841.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-07
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-11-07
AI Technical Summary
When the existing rear fog light optical systems realize imaging patterns with wide left and narrow left and lower left, there are problems of poor uniformity and high cost.
Using an optical system including a first refractive unit and a second refractive unit, the first refractive unit shaped the light emitted by the light source, and the second refractive unit imaged the first refractive unit to ensure the accuracy and uniformity of the light-type pattern and avoid additional diffusion treatment.
A light-type pattern with approximately equal light intensity is realized, which reduces the processing and assembly accuracy requirements, simplifies the production process and reduces costs.
Smart Images
Figure CN223242582U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vehicle lamps, in particular to an optical system suitable for a rear fog lamp and a vehicle lamp. Background Art
[0002] The rear fog lamp regulatory inspection point needs to present an imaging pattern that is wide left and right and narrow top and bottom, which is generally achieved by two solutions.
[0003] Solution 1: The optical solution usually combines a light source with a collimating element, with a diffusion pattern applied to the surface of the collimating element to achieve uniform light distribution. However, this solution has poor uniformity and is highly sensitive to assembly accuracy, which can easily lead to regulatory failure.
[0004] Option 2: MLA technology can achieve almost uniform light intensity within the irradiation range, which solves the problems of Option 1 to a certain extent; however, the semiconductor processing technology used by traditional MLA is expensive. Utility Model Content
[0005] The technical problem to be solved by the present invention is: in order to solve the technical problems in the prior art, the present invention provides an optical system suitable for a rear fog lamp, the parts involved in the optical solution are simple to process, and the intensity of the projected light is approximately equal.
[0006] The technical solution adopted by the present invention to solve its technical problems is: an optical system suitable for a rear fog lamp, comprising a first refraction unit, for shaping the light emitted by a light source, wherein the shape of the light incident surface or the pattern projected by the first refraction unit is the required final projected light pattern; a second refraction unit, located in the positive direction of the light output of the first refraction unit, and for imaging the light distribution at or near the first refraction unit.
[0007] The utility model discloses an optical system suitable for a rear fog lamp. A first refraction unit first shapes the light emitted by a light source, and a second refraction unit images the first refraction unit. Since the shape of the light incident surface of the first refraction unit is set to a required projection pattern, the imaged pattern by the second refraction unit is the required pattern, without the need for additional diffusion. The overall solution is relatively simple and the cost is low.
[0008] Furthermore, the light source is located at or near the focus of the first refraction unit.
[0009] Furthermore, the first refraction unit collimates the light emitted by the light source.
[0010] Furthermore, the first refraction unit converges the light emitted by the light source.
[0011] Furthermore, the first refraction unit diffuses the light emitted by the light source.
[0012] Furthermore, the focus of the second refraction unit is set on the first refraction unit.
[0013] Furthermore, a horizontal dimension of a projection of the first refractive unit in a vertical plane perpendicular to the optical axis is larger than a vertical dimension.
[0014] Furthermore, the projection shape of the first refraction unit in a vertical plane is a rectangle or a rhombus.
[0015] Furthermore, the focal length of the second refraction unit can be adjusted according to the required illumination and the required projection angle.
[0016] A vehicle lamp, characterized by comprising the above-mentioned optical system suitable for a rear fog lamp.
[0017] The beneficial effects of the present invention are:
[0018] 1. The first refraction unit first shapes the light emitted by the light source, and the second refraction unit images the first refraction unit. Since the shape of the incident surface of the first refraction unit is set to the required projection pattern, the solution imaged by the second refraction unit is the required pattern. The overall solution is relatively simple and low in cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0020] Figure 1 This is a schematic structural diagram of an overall optical system suitable for a rear fog lamp in the present invention.
[0021] Figure 2 This is the light pattern of the solution in the utility model.
[0022] In the figure: 1, first refractive unit; 2, second refractive unit; 21, parabolic surface. DETAILED DESCRIPTION
[0023] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.
[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.
[0025] The utility model discloses an optical system suitable for a rear fog lamp.
[0026] Reference Figure 1 and Figure 2 An optical system suitable for a rear fog lamp includes a light source, a first refraction unit 1, and a second refraction unit 2. The light source is located at the focal point of the first refraction unit 1. The first refraction unit 1 is used to shape the light emitted by the light source. The shape of the light incident surface of the first refraction unit 1 or the pattern projected is the desired final projected light pattern. This means that the shape of the light incident surface of the first refraction unit can be the desired projection pattern, or the light incident surface of the first refraction unit can be shielded from the optical surface through methods such as laser engraving to obtain the desired pattern. The second refraction unit 2 is located in the positive direction of the light output of the first refraction unit 1 and is used to image the light distribution at or near the first refraction unit 1.
[0027] During operation, the first refraction unit 1 first shapes the light emitted by the light source, and the second refraction unit 2 images the first refraction unit 1. Since the shape of the light incident surface of the first refraction unit 1 is set to the required final projected light pattern, the imaged solution of the second refraction unit 2 is the required pattern, and no additional diffusion is required. The overall solution is relatively simple and the cost is low.
[0028] Specifically, the focal point of the second refractive unit 2 is set at or near the first refractive unit 1. The focal point of the second refractive unit 2 can be located at the light incident surface of the first refractive unit 1, between the light incident surface and the light exit surface of the first refractive unit 1, at the light exit surface, or a certain distance away from the light incident surface and the light exit surface. The focal length of the second refractive unit 2 can be adjusted according to the required illumination and the required projection angle. That is, the larger the focal length, the smaller the angle of the pattern projected by the second refractive unit 2 in the vertical direction.
[0029] The first refraction unit 1 and the second refraction unit 2 are two transparent refraction units. The light intensity at each point of the imaged light pattern is approximately equal. If the detection point does not meet the regulations due to processing tolerances and assembly tolerances, the light pattern can be made to meet the regulations by increasing or decreasing the current, which is very convenient for rectification.
[0030] In this embodiment, the horizontal dimension of the projection of the first refraction unit 1 in a vertical plane perpendicular to the optical axis is greater than its vertical dimension. The projection of the first refraction unit 1 in the vertical plane is rectangular or rhombus-shaped. Since the regulatory inspection point for rear fog lamps presents an area that is wide left and right and narrow up and down, when the first refraction unit 1 or the light pattern formed by the first refraction unit 1 is rectangular or rhombus-shaped, the final projected light pattern naturally forms the desired rectangular or rhombus-shaped light pattern without the need for diffusion.
[0031] Example 1:
[0032] The first refraction unit 1 collimates the light emitted by the light source.
[0033] Example 2:
[0034] The difference from the first embodiment is that the first refraction unit 1 converges the light emitted by the light source.
[0035] Example 3:
[0036] The first refraction unit 1 diffuses the light emitted by the light source.
[0037] It should be noted that the three embodiments of the first refraction unit 1 can be selected according to the angle and shape of the final projected light pattern.
[0038] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.
Claims
1. An optical system suitable for a rear fog lamp, characterized in that: include A first refraction unit (1) is used to shape the light emitted by the light source, wherein the shape of the light incident surface or the pattern projected by the first refraction unit (1) is the desired final projected light pattern; The second refraction unit (2) is located in the light-emitting direction of the first refraction unit (1) and is used to image the light distribution at or near the first refraction unit (1).
2. The optical system for a rear fog lamp according to claim 1, characterized in that: The light source is located at the focus of the first refraction unit (1).
3. The optical system for a rear fog lamp according to claim 1, characterized in that: The first refraction unit (1) collimates the light emitted by the light source.
4. The optical system for a rear fog lamp according to claim 1, characterized in that: The first refraction unit (1) converges the light emitted by the light source.
5. The optical system for a rear fog lamp according to claim 1, wherein: The first refraction unit (1) diffuses the light emitted by the light source.
6. The optical system for a rear fog lamp according to claim 5, characterized in that: The focus of the second refraction unit (2) is arranged at or near the first refraction unit (1).
7. The optical system for a rear fog lamp according to claim 1, wherein: The projection of the first refractive unit (1) in a vertical plane perpendicular to the optical axis has a horizontal dimension that is larger than a vertical dimension.
8. The optical system for a rear fog lamp according to claim 7, wherein: The projection shape of the first refractive unit (1) in a vertical plane is a rectangle or a rhombus.
9. The optical system for a rear fog lamp according to claim 1, wherein: The focal length of the second refraction unit (2) can be adjusted according to the required illumination and the required projection angle.
10. A vehicle lamp, characterized in that: The optical system suitable for a rear fog lamp comprises the optical system according to any one of claims 1 to 9.