Optical system for headlamp

Abstract

The utility model discloses an optical system for a headlamp. The optical system comprises a light source for emitting light; the primary optical unit is used for carrying out primary shaping on the light rays and transmitting the light rays to the reflection imaging unit; the reflection imaging unit is correspondingly arranged in the light emitting direction of the primary optical unit, and the reflection imaging unit images light distribution near a focus in the horizontal direction and reflects light to the refraction imaging unit; the refraction imaging unit is located in the light emitting direction of the reflection imaging unit, and the refraction imaging unit is used for imaging light distribution near the focus in the vertical direction. According to the optical system for the headlamp, the reflection imaging unit is used for imaging in the horizontal direction, the refraction imaging unit is used for imaging in the vertical direction, and therefore a wide horizontal projection angle is achieved, and uniform road illumination is achieved.

Description

Technical Field

[0001] This utility model relates to the field of automotive lighting technology, and in particular to an optical system for headlights. Background Technology

[0002] With the rapid development of technology, automotive lighting technology is also constantly advancing. Headlights are now designed to be more compact, not only meeting regulatory requirements but also looking more technologically advanced.

[0003] Existing optical structures have limited projection angles in the horizontal direction, requiring the use of other optical units to diffuse in the horizontal direction to achieve a wider horizontal projection angle. Utility Model Content

[0004] The technical problem to be solved by this utility model is: in order to solve the technical problem of limited horizontal projection angle in the prior art, this utility model provides an optical system for headlights, which uses a reflective imaging unit to image in the horizontal direction and a refractive imaging unit to image in the vertical direction, thereby achieving a wider horizontal projection angle and achieving uniform road illumination.

[0005] The technical solution adopted by this utility model to solve its technical problem is: an optical system for a headlight, comprising: a light source for emitting light; a primary optical unit, which preliminarily shapes the light and propagates it to a reflective imaging unit; a reflective imaging unit corresponding to the light-emitting direction of the primary optical unit, which images the light distribution near the focal point in the horizontal direction and reflects the light to a refractive imaging unit; and a refractive imaging unit located in the light-emitting direction of the reflective imaging unit, which images the light distribution near the focal point in the vertical direction.

[0006] This utility model relates to an optical system for headlights. It uses a primary optical unit to initially shape the light source, a reflection imaging unit to image in the horizontal direction, and a refraction imaging unit to image in the vertical direction. This enables a wide horizontal projection angle, thereby achieving uniform road illumination, and is particularly suitable for headlights.

[0007] Furthermore, the contour of the reflective imaging unit is at least partially parabolic, with a focal point F1. This allows for imaging of the light distribution near the focal point in the horizontal direction.

[0008] Furthermore, in order to obtain a wider exit angle in the horizontal direction, the contour of the reflective imaging unit is at least partially hyperbolic, and the contour has a virtual focal point F1'.

[0009] Furthermore, in order to change the light emission angle in the horizontal direction, the contour line of the reflective imaging unit is a free curve.

[0010] Furthermore, the primary optical unit is a reflection unit or a refraction unit.

[0011] Furthermore, the contour line of the refractive imaging unit has a focal point F2, and the distance between the focal point F2 and the focal point F1 of the contour line of the reflective imaging unit is twice the focal length of the contour line of the reflective imaging unit.

[0012] Furthermore, since the focal point of the contour line of the refractive imaging unit can be flexibly adjusted, the focal point F2 is located at the bottom boundary of the primary optical unit, or between the primary optical unit and the reflective imaging unit, or away from the primary optical unit, or between the light source and the primary optical unit.

[0013] Furthermore, the focal length of the refractive imaging unit is greater than that of the reflective imaging unit. This allows for the formation of a light pattern that is wide horizontally and narrow vertically.

[0014] Furthermore, in order to further improve the projection angle in the horizontal direction, the light-emitting surface and / or light-incident surface of the refractive imaging unit has a diffusion pattern.

[0015] Furthermore, the refractive imaging unit is provided with an optical unit having a light diffusion function in the light emission direction.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. The present invention is used in the optical system of headlights. It utilizes a reflective imaging unit to image in the horizontal direction and a refractive imaging unit to image in the vertical direction. The focal length of the reflective imaging unit is smaller than that of the refractive imaging unit, thereby achieving a wider horizontal projection angle and achieving uniform road illumination.

[0018] 2. The optical system of this utility model for headlights has a contour line of the reflective imaging unit that can be of different shapes to meet the needs of different usage scenarios such as low beam, corner fog light, and low beam assist. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a three-dimensional structural diagram of the optical system for headlights according to this utility model;

[0021] Figure 2 for Figure 1 Top view;

[0022] Figure 3 This is the optical path diagram for Example 2;

[0023] Figure 4 This is a schematic diagram of the light principle in Example 3;

[0024] Figure 5 This is a three-dimensional structural diagram of Example 4.

[0025] In the diagram: 1. Light source, 2. Primary optical unit, 3. Reflection imaging unit, 4. Refraction imaging unit. Detailed Implementation

[0026] 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.

[0027] 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.

[0028] 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.

[0029] Example 1, such as Figure 1 As shown, an optical system for a headlight includes:

[0030] The light source 1 used to emit light is preferably located at or near the focal point of the primary optical unit 2.

[0031] The primary optical unit 2 initially shapes the light rays and propagates them to the reflection imaging unit 3. Preferably, in this embodiment, the primary optical unit 2 is a reflection unit. Specifically, the reflection unit is a mirror. The mirror initially shapes the light emitted from the light source 1 and then directs the light rays towards the reflection imaging unit 3.

[0032] A reflection imaging unit 3, corresponding to the light-emitting direction of the primary optical unit 2, images the light distribution near the focal point in the horizontal direction and reflects the light to the refraction imaging unit 4. In this embodiment, the contour line of the reflection imaging unit 3 includes a parabola with a focal point F1 located at the root of the reflection unit or between the light source 1 and the reflection imaging unit 3. After the light rays are incident on the reflection imaging unit 3, they are imaged in the horizontal direction through the reflection imaging unit 3.

[0033] A refractive imaging unit 4 is located in the light-emitting direction of the reflective imaging unit 3. The refractive imaging unit 4 images the light distribution near the focal point in the vertical direction. Specifically, the outline of the refractive imaging unit 4 is set in a vertical plane parallel to the direction of travel. The outline of the refractive imaging unit 4 has a focal point F2, and the distance between focal point F2 and focal point F1 of the outline of the reflective imaging unit 3 is twice the focal length of the outline of the reflective imaging unit 3. The outline extends along the normal direction to form the refractive imaging unit 4, and the guiding curve for the extension of the normal direction can be a straight line or a curve.

[0034] Specifically, the focal point of the contour line of the refractive imaging unit 4 can be flexibly adjusted. The focal point F2 is located at the bottom boundary of the primary optical unit 2, or between the primary optical unit 2 and the reflective imaging unit 3, or away from the primary optical unit 2, or between the light source 1 and the primary optical unit 2.

[0035] Preferably, the focal length of the refractive imaging unit 4 is greater than the focal length of the reflective imaging unit 3, thus enabling the formation of a headlight pattern that is wide horizontally and narrow vertically.

[0036] Preferably, the refractive imaging unit 4 is provided with an optical unit having a light diffusion function in the light emission direction. The entire optical system consists of at least one light source, a primary optical unit, a reflection imaging unit, and a refractive imaging unit.

[0037] Example 2, as Figure 3 As shown, based on Embodiment 1, two primary optical units 2 and two reflection imaging units 3 are provided, and the primary optical units 2 are symmetrically arranged with each other, and the reflection imaging units 3 are also symmetrically arranged with each other.

[0038] Example 3, as Figure 4As shown, the contour line of the reflection imaging unit 3 can be a hyperbola, that is, the light emitted from the focal point converges in the opposite direction to the virtual focal point F1' after passing through the contour line of the reflection imaging unit 3; the contour line of the refraction imaging unit 4 in the vertical plane parallel to the driving direction has its focal point F2 coinciding with F1'; because the projection of light in the horizontal direction is mostly determined by the reflection imaging unit 3, when the contour line contains a hyperbola, the horizontal emission angle is wider than that in Embodiment 1, which is also more beneficial to the uniformity of illumination.

[0039] Specifically, the light-emitting surface and / or light-receiving surface of the refractive imaging unit 4 has a diffusion pattern, which further enhances the projection angle in the horizontal direction.

[0040] Example 4, as Figure 5 As shown, the difference from Embodiment 1 is that the primary optical unit 2 is a refractive unit, specifically, the refractive unit can be a concentrator.

[0041] In Example 5, the contour line of the reflection imaging unit 3 can be a free curve, which can change the light emission angle in the horizontal direction.

[0042] In summary, this invention provides an optical system for headlights that utilizes a reflective imaging unit to image in the horizontal direction and a refractive imaging unit to image in the vertical direction, thereby achieving a wider horizontal projection angle and more uniform road illumination.

[0043] 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. An optical system for a headlamp, characterized in that include: A light source used to emit light (1); The primary optical unit (2) performs preliminary shaping of light and propagates it to the reflection imaging unit (3); The reflection imaging unit (3) located in the light-emitting direction of the primary optical unit (2) performs imaging of the light distribution near the focal point in the horizontal direction and reflects the light to the refraction imaging unit (4). A refractive imaging unit (4) is located in the light-emitting direction of the reflective imaging unit (3). The refractive imaging unit (4) images the light distribution near the focal point in the vertical direction.

2. The optical system for a headlamp according to claim 1, characterized in that, The outline of the reflection imaging unit (3) is at least partially a parabola with a focal point F1.

3. The optical system for a headlamp according to claim 1, characterized by The contour of the reflection imaging unit (3) is at least partially hyperbolic, and the contour has a virtual focal point F1'.

4. The optical system for a headlamp according to claim 1, characterized by The outline of the reflection imaging unit (3) is a free curve.

5. The optical system for a headlamp according to claim 1, characterized by The primary optical unit (2) is a reflection unit or a refraction unit.

6. Optical system for a headlamp according to any one of claims 1 to 5, characterized in that The contour line of the refractive imaging unit (4) has a focal point F2, and the distance between the focal point F2 and the focal point F1 of the contour line of the reflective imaging unit (3) is twice the focal length of the contour line of the reflective imaging unit (3).

7. Optical system for a headlamp according to claim 6, characterized in that The focal point F2 is located at the bottom boundary of the primary optical unit (2), or between the primary optical unit (2) and the reflection imaging unit (3), or away from the primary optical unit (2), or between the light source (1) and the primary optical unit (2).

8. Optical system for a headlamp according to claim 7, characterized in that The focal length of the refractive imaging unit (4) is greater than that of the reflective imaging unit (3).

9. Optical system for a headlamp according to claim 8, characterized in that The light-emitting surface and / or light-receiving surface of the refractive imaging unit (4) has a diffusion pattern, and the surface of the primary optical unit (2) or the primary optical unit (2) and the focal point are additionally decorated with a diffusion pattern.

10. Optical system for a headlamp according to claim 9, characterized in that The refractive imaging unit (4) is provided with an optical unit with light diffusion function in the light output direction.

Images