Headlamp optical system, lighting module and vehicle lamp

Abstract

The utility model discloses a headlamp optical system, which comprises a primary optical system and an imaging system, and is characterized in that the primary optical system is arranged on a light emitting path of light rays emitted by a light source so as to converge part of the light rays to a focus area of the primary optical system through the primary optical system; the imaging system comprises a first imaging unit and a second imaging unit, the first imaging unit and the second imaging unit are sequentially arranged in the forward direction of the optical axis, the first imaging unit is suitable for imaging light distribution of the focus area in the horizontal direction, and the second imaging unit is suitable for imaging light distribution of the focus area in the vertical direction. The primary optical system and the imaging system are matched with each other, the primary optical system can converge light rays emitted by the light source to the focus area, imaging is carried out on the light rays in the focus area in the vertical direction and the horizontal direction through the imaging system, and finally formed light patterns are uniform and equal in illumination line width. And the road illumination performance is more excellent.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile lamps, and in particular to a headlight optical system, and also to a lighting module and a vehicle lamp. Background Art

[0002] The existing headlight lens module optical system includes: a light source, a primary optical unit, a part with a cutoff line shape (available for low beam, but not for high beam depending on the situation), and an imaging system; the primary optical unit is usually a condenser or a reflector, the part with a cutoff line shape is usually called a baffle, and the imaging system is a lens.

[0003] The Chinese utility model patent (CN219493905U) is a concentrator headlight optical system, lighting device and vehicle lamp, wherein the primary optical unit adopts a concentrator, and the imaging system adopts a lens system for imaging in a single direction, wherein the concentrator and the lens for imaging in a certain direction are integrated as a thick-walled part; this solution can achieve better road lighting uniformity and performance. In addition, this solution has a smaller assembly tolerance, but the gram weight of the thick-walled part is heavier, and the side wall and the total reflection cutoff line surface will cause unknown stray light.

[0004] In view of this, it is necessary to design a headlight optical system to overcome the above defects. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art.

[0006] To this end, the utility model provides a headlight optical system that can achieve higher optical performance in a smaller lens opening size, and the light pattern finally formed is uniform, with equal illumination line width and better road lighting performance.

[0007] According to the first aspect of the utility model, a headlight optical system is provided, including a primary optical unit and an imaging system, wherein the primary optical unit is arranged on the light exit path of the light emitted by the light source so as to be able to converge part of the light at the focal area of ​​the primary optical unit through the primary optical unit, and the imaging system includes a first imaging unit and a second imaging unit, wherein the first imaging unit and the second imaging unit are arranged in sequence along the positive direction of the optical axis, and the first imaging unit is suitable for imaging the light distribution of the focal area in the horizontal direction, and the second imaging unit is suitable for imaging the light distribution of the focal area in the vertical direction.

[0008] Preferably, the contour line of the first imaging unit in the horizontal plane is plano-convex, bi-convex or concave-planar, and the contour line is rotated around a horizontal axis located at the focus to form the first imaging unit.

[0009] Further preferably, in a vertical plane, the center of the contour line of the first imaging unit parallel to the optical axis coincides with the focus to form a concentric circular arc line.

[0010] Preferably, in a vertical plane, the first imaging unit is suitable for receiving light emitted from the focus, and a propagation direction of the light passing through the first imaging unit remains unchanged.

[0011] Further preferably, a contour line of the second imaging unit in a vertical plane parallel to the optical axis is plano-convex, bi-convex or concave-planar, and the contour line is stretched or rotated or swept along the normal of the plane in which it is located to form the second imaging unit.

[0012] Preferably, in a vertical plane parallel to the optical axis, the second imaging unit is suitable for receiving the light transmitted by the first imaging unit, and collimating and correcting the light emitted from the focal area into parallel light via the second imaging unit, so that the second imaging unit can image the light distribution distributed in the focal plane in the vertical plane.

[0013] Further preferably, a reflecting unit is included, which is arranged between the primary optical unit and the imaging system and is located on the emission path of the light. The reflecting unit is suitable for reflecting part of the light to the imaging system and performing imaging through the imaging system, and the reflecting unit is suitable for forming a cut-off line during imaging.

[0014] Preferably, the reflective surface of the reflective unit is plated with aluminum to form an aluminum-plated reflective surface, or the reflective unit is configured as a highlight component.

[0015] Further preferably, the first imaging unit, the primary optical unit and the reflection unit are formed as an integral piece. In this case, the reflection unit reflects light via its internal total reflection structure.

[0016] The beneficial effect of the utility model is that, through the mutual cooperation between the primary optical unit and the imaging system, the primary optical unit can converge the light emitted by the light source into the focal area, and image the light distribution in the focal area in the vertical and horizontal directions respectively through the imaging system, and can achieve higher optical performance in a smaller opening size. In addition, the light pattern finally formed is uniform, with equal illumination line width, and the road lighting performance is better.

[0017] A second aspect of the present invention provides a lighting module, which adopts the headlight optical system described in the first aspect of the present invention.

[0018] A third aspect of the present invention provides a vehicle lamp, which adopts a lighting module provided by the second aspect of the present invention.

[0019] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structures specifically pointed out in the description, claims and drawings.

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 It is a structural schematic diagram of the low beam optical system of the headlight optical system of the utility model;

[0023] Figure 2 It is a light principle diagram of the headlight optical system of the utility model in a vertical plane;

[0024] Figure 3 It is a structural schematic diagram of the high beam optical system of the headlight optical system of the utility model;

[0025] Figure 4 It is a schematic structural diagram of the second imaging unit of the headlight optical system of the utility model when it is tilted;

[0026] Figure 5 It is a structural schematic diagram of a headlight optical system of the utility model in which the primary optical unit, the reflection unit and the first imaging unit are integrated into one.

[0027] Reference numerals:

[0028] 1. Primary optical unit; 2. Reflection unit; 3. Imaging system; 31. First imaging unit; 32. Second imaging unit; 4. Focus. DETAILED DESCRIPTION

[0029] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0030] In the description of the present invention, it should be understood that the terms "top", "bottom", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0031] See also Figure 1 A headlight optical system according to a specific embodiment of the utility model comprises a primary optical unit 1 and an imaging system 3. The primary optical unit 1 is arranged on the light-emitting path of the light emitted by the light source, so as to be able to converge part of the light to the focal point 4 of the imaging system 3 through the primary optical unit 1. The primary optical unit 1 may be a condenser or a reflector, and of course, may be set to any device that can converge the light emitted by the light source and evenly distribute it near the focal point 4 of the imaging system 3.

[0032] See also Figures 1 to 3 The imaging system 3 includes a first imaging unit 31 and a second imaging unit 32, which are arranged in sequence along the positive direction of the optical axis, and the first imaging unit 31 is suitable for imaging the light distribution at the focus 4 area in the horizontal direction, and the second imaging unit 32 is suitable for imaging the light distribution near the focus 4 area in the vertical direction. Among them, the contour line of the first imaging unit 31 in the horizontal plane is flat convex, biconvex or concave, and is typically a flat convex contour line. And the contour line rotates around the horizontal axis located at the focus 4 to form the first imaging unit 31, and the center of the contour line of the first imaging unit 31 in the vertical plane parallel to the optical axis coincides with the focus 4, thereby forming a concentric circular arc line. And the first imaging unit 31 is arranged on the light output path of the primary optical unit 1. In the horizontal plane, when the light emitted from the focus 4 passes through the first imaging unit 31, it is refracted by the first imaging unit 31 and then emitted in parallel with each other. Furthermore, in the vertical plane, the propagation direction of the light remains unchanged, thereby enabling the first imaging unit 31 to image the light distribution of the focal area in the horizontal direction.

[0033] See also Figure 4Specifically, the contour line of the second imaging unit 32 in the vertical plane parallel to the optical axis is plano-convex, bi-convex or concave-flat, and the contour line is stretched, rotated, and swept along the normal of the plane in which it is located to form the second imaging unit 32. In addition, the contour line may extend in a direction inclined to the optical axis. In the vertical plane parallel to the optical axis, the second imaging unit 32 is suitable for receiving the light transmitted through the first imaging unit 31, and because the propagation direction of the light after passing through the first imaging unit 31 does not change, when the light passes through the second imaging unit 32 again, the second imaging unit 32 collimates the light emitted from the focal area, and then the second imaging unit 32 can image the light distribution of the focal area in the vertical direction.

[0034] In addition, a reflection unit 2 is provided between the primary optical unit 1 and the imaging system 3, and the reflection unit 2 is located on the emission path of the light, and the emitting surface of the reflection unit 2 is aluminum-plated to form an aluminum-plated reflection surface, or the reflection unit 2 is set as a highlight to realize the function of reflecting light. Therefore, after the light emitted by the light source passes through the primary optical unit 1, part of the light converges at the focus 4 and is evenly distributed, and part of the light is reflected to the imaging system 3 through the reflection unit 2, and then the imaging system 3 images the incident light in the horizontal and vertical directions respectively, and due to the setting of the reflection unit 2, the reflection unit 2 is set to a set shape to form a cutoff line in the final imaging (low beam light type or high beam light type). And the width of the formed light type in the horizontal direction is determined by the first imaging unit 31, and the angle in the vertical direction is determined by the second imaging unit 32. Therefore, by adjusting the distance between the primary optical unit 1 and the focus 4 and the focal length of the imaging system 3, higher optical performance can be achieved in a smaller lens opening size, and the final light pattern is uniform, with equal illumination line width and better road lighting performance. The thickness of the imaging unit used is smaller, and the overall weight is further reduced.

[0035] See also Figure 5 In addition, the first imaging unit 31, the primary optical unit 1 and the reflecting unit 3 can be regarded as a whole, and the reflecting unit 3 realizes the reflecting function through total internal reflection.

[0036] The utility model provides a lighting module, which adopts the headlight optical system described in any one of the above embodiments of the utility model.

[0037] The utility model provides a vehicle lamp, which adopts the lighting module described in any one of the above embodiments of the utility model.

[0038] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0039] The above description is based on the ideal embodiment of the utility model. Through the above description, relevant staff can make various changes and modifications without deviating from the technical concept of the utility model. The technical scope of the utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A headlight optical system, characterized in that: The invention comprises a primary optical unit (1) and an imaging system (3), wherein the primary optical unit (1) is arranged on a light exit path of light emitted by a light source so as to converge part of the light via the primary optical unit (1) to a focal point (4) area of ​​the primary optical unit (1), and the imaging system (3) comprises a first imaging unit (31) and a second imaging unit (32), wherein the first imaging unit (31) and the second imaging unit (32) are arranged in sequence along the positive direction of the optical axis, and the first imaging unit (31) is suitable for imaging the light distribution of the focal point area in the horizontal direction, and the second imaging unit (32) is suitable for imaging the light distribution of the focal point area in the vertical direction.

2. The headlight optical system according to claim 1, characterized in that: The contour line of the first imaging unit (31) in the horizontal plane is plano-convex, bi-convex or concave-planar, and the contour line is rotated around a horizontal axis located at the focus (4) to form the first imaging unit (31).

3. The headlight optical system according to claim 2, characterized in that: In a vertical plane, the center of the contour line of the first imaging unit (31) parallel to the optical axis coincides with the focus (4) to form a concentric circular arc line.

4. The headlight optical system according to claim 3, characterized in that: In a vertical plane, the first imaging unit (31) is suitable for receiving light emitted from the focus (4), and the propagation direction of the light passing through the first imaging unit (31) remains unchanged.

5. The headlight optical system according to claim 4, characterized in that: The contour line of the second imaging unit (32) in a vertical plane parallel to the optical axis is plano-convex, bi-convex or concave-planar, and the contour line is stretched or rotated or swept along the normal direction of the plane where it is located to form the second imaging unit (32).

6. The headlight optical system according to claim 5, characterized in that: In a vertical plane parallel to the optical axis, the second imaging unit (32) is suitable for receiving the light transmitted by the first imaging unit (31), and collimating and correcting the light emitted from the focal area into parallel light via the second imaging unit (32), so that the second imaging unit (32) images the light distribution distributed in the focal plane in the vertical plane.

7. The headlight optical system according to claim 1, characterized in that: The invention also comprises a reflection unit (2), wherein the reflection unit (2) is arranged between the primary optical unit (1) and the imaging system (3) and is located on the emission path of the light. The reflection unit (2) is suitable for reflecting part of the light to the imaging system (3) and performing imaging via the imaging system (3), and the reflection unit (2) is suitable for forming a cut-off line during imaging.

8. The headlight optical system according to claim 7, characterized in that: The reflective surface of the reflective unit (2) is aluminum-plated to form an aluminum-plated reflective surface, or the reflective unit (2) is configured as a highlight component.

9. The headlight optical system according to claim 7, characterized in that: The first imaging unit (31), the primary optical unit (1) and the reflection unit (2) are formed as an integral part, and the reflection unit reflects light via its internal total reflection structure.

10. A lighting module, characterized in that: A headlight optical system according to any one of claims 1 to 9 is used.

11. A vehicle lamp, characterized in that: Includes the lighting module described in claim 10.

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