CN220436328U - Refractive and reflective optical system, car lamp and vehicle - Google Patents

Abstract

The utility model relates to the field of car lamp illumination, and discloses a refraction and reflection optical system, a car lamp and a car, wherein the refraction and reflection optical system comprises a first optical structure and a second optical structure, the first optical structure and the second optical structure are sequentially arranged along the light emitting direction of a light source, the first optical structure has a first collimation direction, the second optical structure has a second collimation direction, the first optical structure is a refraction optical structure, the second optical structure is a reflection optical structure, a contour ring of the first optical structure rotates around an axis at a focus to obtain the first optical structure, the first optical structure has a unique focus, and the unique focus of the first optical structure is a system focus. According to the utility model, the focal length between the first optical structure and the second optical structure is regulated, so that dipped beam patterns with different widths are obtained, and the focal point of the second optical structure can be accurately positioned at the focal point of the system, so that the whole optical system is ensured not to be out of focus, and the horizontal bottom of the cut-off line is very clear.

Description

Refractive and reflective optical system, car lamp and vehicle

Technical Field

The utility model relates to the technical field of car lamp illumination, in particular to a refraction and reflection optical system. In addition, the utility model also relates to a car lamp and a vehicle.

Background

For low beam, in order to obtain a clear cut-off line shape, either the lens or the mirror needs to accurately image the light at the focus; in the prior art, focal lines of two collimation optical parts jointly act to form a focal area of the system; the light is now set to pass through the first direction collimated optical portion and the second direction collimated optical portion in order, and the first direction collimated optical portion is a refractive optical portion (since the first collimated portion is a reflective optical portion, there is no problem). The focal line of the first-direction collimating optical part can be arranged at the focus, but if the focus parameter of the second-direction collimating optical part is still arranged at the focus of the system, the finally imaged light type is out of focus, namely the cut-off line is not clear.

In practice, after a beam of parallel light passes through the second collimating part and the first collimating part in reverse order, the light is not precisely converged in the focal area of the system, but a certain degree of offset is generated, so that the light is out of focus. This is because the parallel light passes through the second collimating part and then the light undergoes a refraction, which means that the light is deflected at an angle in the first collimating part, so that a certain deviation exists between the incident light and the emergent light of the first collimating part, and the thicker the wall thickness of the first collimating part is, the larger the deviation is.

Therefore, the focal position of the second collimating part needs to be continuously approximated by adopting an attempted method to be accurately determined, the complexity of optical design is increased, and the defocus to a certain extent is also caused, so that the focusing is not perfect.

In view of this, it is necessary to design a refractive and reflective optical system to meet the practical requirements.

Disclosure of Invention

In view of the above-mentioned technical problems to be solved, a first aspect of the present utility model provides a refractive-reflective optical system capable of ensuring that the optical system is not out of focus and obtaining a clear cutoff line shape for near light.

In order to solve the above technical problems, a first aspect of the present utility model provides a refractive optical system, which includes a first optical structure and a second optical structure, where the first optical structure and the second optical structure are sequentially arranged along a light emitting direction of a light source, the first optical structure has a first collimation direction, the second optical structure has a second collimation direction, the first optical structure is a refractive optical structure, the second optical structure is a reflective optical structure, the first optical structure has a unique focus, and the unique focus of the first optical structure is a system focus; the contour of the first optical structure is rotated about an axis at the focal point to obtain the first optical structure.

Preferably, the second optical structure is a parabola in a vertical plane parallel to the optical axis, which is formed by stretching along a normal direction of the vertical plane, and the focus of the parabola coincides with the focus of the first optical structure.

Further preferably, a light source is disposed at the focal point, and in the vertical plane, the light emitted by the light source is suitable for being converged at the focal point after reversely passing through the second optical structure and the first optical structure.

Preferably, the first optical structure is adapted to collimate the incident light in a horizontal direction, the second optical structure is adapted to collimate the incident light in a vertical direction, and a focal length of the first optical structure is smaller than a focal length of the second optical structure.

Further preferably, the first optical structure includes a first light incident surface and a first light emergent surface, the first light incident surface protrudes along the light emergent direction of the light source to form an arc-shaped first light incident surface, and the first light emergent surface protrudes along the light emergent direction of the light source to form an arc-shaped first light emergent surface; the second optical structure is provided with an arc-shaped reflecting surface, and a reflecting film or a total reflecting surface is plated outside the reflecting surface.

Preferably, the first optical structure and the second optical structure are integrated into a third optical structure, the third optical structure includes a third light incident surface and a third light emergent surface, the third light incident surface protrudes along the light emergent direction of the light source to form an arc shape, the third light emergent surface is arranged in an arc shape, and the third light emergent surface is coated with a reflective film or is arranged as internal total reflection.

Further preferably, the first optical structure is adapted to collimate light in a vertical direction, the second optical structure is adapted to collimate light in a horizontal direction, and the focal length of the first optical structure is smaller than the focal length of the second optical structure.

Preferably, the second optical structure is disposed obliquely to the optical axis, and the second optical structure is formed by stretching a parabola in a horizontal plane along the axis of rotation of the first optical structure; the profile ring of the first optical structure rotates around an axis passing through the focal point and parallel to the stretching direction of the second optical structure to form the first optical structure, and in a vertical plane, a beam of parallel light reversely passes through the first optical structure and then is converged at the focal point of the system.

The second aspect of the utility model provides a vehicle lamp comprising the refractive and reflective optical system according to the first aspect of the utility model.

A third aspect of the utility model provides a vehicle comprising a lamp according to the second aspect of the utility model.

According to the preferable technical scheme, the refractive and reflective optical system is characterized in that the first optical structure and the second optical structure are sequentially arranged along the light emitting direction of the light source, the first optical structure is obtained by rotating around the focal position, and the first optical structure is provided with a unique focal point; in addition, through the focal length between first optical structure and the second optical structure to this obtains the dipped beam type of different width, and because the setting of second optical structure, the focus of first optical structure and second optical structure can be located same department accurately, in order to guarantee that whole optical system is not out of focus, can make the horizontal bottom of the cut-off line that obtains very clear simultaneously.

Additional features and advantages of the utility model will be set forth in the detailed description which follows.

Drawings

Fig. 1 is a schematic structural diagram of a refractive-reflective optical system according to embodiment 1 of the present utility model;

FIG. 2 is a view showing the light path in a vertical plane parallel to the optical axis of a refraction-reflection optical system according to embodiment 1 of the present utility model;

FIG. 3 is a light path diagram of a first optical structure of a catadioptric system of embodiment 1 of the present utility model in a vertical plane parallel to the optical axis;

fig. 4 is an optical path diagram of a first optical structure of a refractive-reflective optical system of embodiment 1 of the present utility model in a vertical plane perpendicular to an optical axis;

FIG. 5 is a light path diagram of a second optical structure of a catadioptric system of embodiment 1 of the present utility model in a vertical plane parallel to the optical axis;

fig. 6 is a schematic structural diagram of a refractive-reflective optical system according to embodiment 2 of the present utility model;

FIG. 7 is a low beam pattern formed by a refractive optical system according to an embodiment of the present utility model;

fig. 8 is a schematic structural diagram of a refractive-reflective optical system in embodiment 3 of the present utility model;

fig. 9 is an optical path diagram of a refractive-reflective optical system of embodiment 3 of the present utility model in a vertical plane parallel to the optical axis;

fig. 10 is a light path diagram of a first optical structure of a refractive-reflective optical system in a horizontal plane according to embodiment 3 of the present utility model;

FIG. 11 is a light path diagram of a second optical structure of the refractive-reflective optical system in an inclined plane according to embodiment 3 of the present utility model;

fig. 12 is an ADB light pattern diagram formed by the refractive-reflective optical system according to the embodiment of the present utility model.

Reference numerals

1. First optical structure 2 second optical structure

3. The first light incident surface of the third optical structure 11

12. Second light-emitting surface 21 reflecting surface

31. Third light incident surface 32 and third light emergent surface

Detailed Description

The following describes specific embodiments of the present utility model in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the utility model, are not intended to limit the utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured," and "connected" are to be construed broadly, and for example, the term "connected" may be a fixed connection, a removable connection, or an integral connection; either directly or indirectly via an intermediate medium, or in communication with each other or in interaction with each other. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1, a refractive-reflective optical system in a specific embodiment of the present utility model includes a first optical structure 1 and a second optical structure 2, where the first optical structure 1 and the second optical structure 2 are sequentially disposed along a light emitting direction of a light source, the first optical structure 1 has a first collimation direction, the second optical structure 2 has a second collimation direction, the first optical structure 1 is a refractive optical structure, the second optical structure 2 is a reflective optical structure, the first optical structure 1 has a unique focal point, the unique focal point of the first optical structure 1 is a system focal point F, a focal point of a contour line of the first optical structure 1 is located at the system focal point F, and the contour line rotates around an axis at the focal point to obtain the first optical structure 1.

The first alignment direction may be a horizontal direction or a vertical direction, and the second alignment direction may be a horizontal direction or a vertical direction.

Example 1

In this embodiment, the first collimation direction of the first optical structure 1 is a horizontal direction to be able to correct light rays in the horizontal direction by the first collimation portion, and the second collimation direction of the second optical structure 2 is a vertical direction to be able to correct light rays in the vertical direction by the second collimation portion. And the first optical structure 1 and the second optical structure 2 are arranged in sequence.

Referring to fig. 2 to 5, the first optical structure 1 and the second optical structure 2 may be configured in such a manner that the first optical structure 1 includes a first light incident surface 11 and a first light emergent surface 12, and the first light incident surface 11 protrudes in a light source light emergent direction to form an arc-shaped first light incident surface 11, and the first light emergent surface 12 protrudes in an optical axis direction to form an arc-shaped first light emergent surface 12; the second optical structure 2 comprises an arcuate reflecting surface 21. When the light emitted by the light source sequentially passes through the first light incident surface 11 and the first light emergent surface 12 of the first optical structure 1, the emitted light is completely irradiated onto the arc-shaped reflecting surface 21 of the second optical structure 2, and the arc-shaped reflecting surface 21 can completely receive the light passing through the first optical structure 1 and reflect the light irradiated thereon through the arc-shaped reflecting surface 21 to be emitted.

Referring to fig. 2 to 4, in a vertical plane parallel to the optical axis, when the light emitted from the light source passes through the first optical structure 1, the exit angle of the light hardly changes. And in a vertical plane perpendicular to the optical axis, a beam of parallel light is focused at the focal point after passing through the first optical structure 1 in the opposite direction.

Referring to fig. 4, the first optical structure 1 is in a vertical plane perpendicular to the optical axis, the first optical structure 1 has a flat cam profile, the only focus of the first optical structure 1 is the system focus F, the focus of the profile of the first optical structure 1 is located at the system focus F, and the profile ring rotates around the axis at the focus to obtain the first optical structure 1. And in the vertical plane, after the light source at the focus passes through the first optical structure 1, the first optical structure 1 can perform collimation correction on the light passing through the first optical structure and then emit the light in parallel.

Referring to fig. 3, after the light emitted from the focal point F passes through the first optical structure 1 in a vertical plane parallel to the optical axis, the exit path thereof is not changed, because in the plane, the contour line of the first optical structure 1 is concentric circles, the center of which is located at the focal point F, the propagation direction of the light emitted from the focal point (center of circle) is not changed after passing through the circles, and the first optical structure 1 has a unique focal point.

As shown in fig. 2, the second optical structure 2 is a reflective optical structure having a straight focal line as a parabolic cylinder, the focal line being located at the focal point F. The second optical structure 2 is stretched by a parabola in a vertical plane parallel to the optical axis along the normal of the plane, the focus of which coincides with the focus of the first optical structure 1 at point F. In a vertical plane parallel to the optical axis, the light rays emitted from the system focus F sequentially pass through the first optical structure 1 and the second optical structure 2, and then are emitted in parallel to each other. And the focal length of the first optical structure 1 is smaller than that of the second optical structure 2, so that a low beam pattern of wide left and right and narrow up and down as shown in fig. 7 can be obtained, and in addition, since the first optical structure 1 is rotated around the focal point, the focal point is precisely located at the point F and is very clear for the horizontal bottom of the low beam cutoff.

Example 2

Referring to fig. 6, the first optical structure 1 is still capable of collimating and correcting light in the horizontal direction, and the second optical structure 2 is collimating and correcting light in the vertical direction, where the first optical structure 1 and the second optical structure 2 are integrated to form a third optical structure 3, and the third optical structure 3 is a transparent refractive optical conductor. The first optical structure 1 and the second optical structure 2 may be integrally formed by a connection structure. In the vertical plane perpendicular to the optical axis, the focal point of the contour line of the third light incident surface 31 of the third optical structure 3 is located at the system focal point F, and the contour line of the third light incident surface 31 is obtained by rotating around the horizontal axis of the focal point, and the third light incident surface 31 is the reflecting surface 21 of the second optical structure 2, and the outer portion of the reflecting surface is coated with a reflecting film or adopts total internal reflection to reflect light. In addition, the third light incident surface 31 is formed to have a unique focal point.

The third light-emitting surface 32 of the third optical structure 3 is formed by stretching a parabola in a vertical plane parallel to the optical axis along a plane normal direction, and the focal point of the formed third light-emitting surface 32 is located at a point F.

Example 3

Referring to fig. 8 to 11, the first optical structure 1 is capable of performing collimation correction on incident light in a vertical direction, the second optical structure 2 is capable of performing collimation correction on incident light in a horizontal direction, and a focal length of the first optical structure 1 is smaller than a focal length of the second optical structure 2.

Specifically, in a vertical plane parallel to the optical axis, the first optical structure 1 has a flat convex profile at the focus, the profile being rotated about the vertical axis at the focus, whereby the first optical structure 1 is obtained.

In a vertical plane perpendicular to the optical axis, the propagation direction of the light rays emitted from the focus is not changed after the light rays pass through the first optical structure 1; and in a vertical plane parallel to the optical axis, a beam of parallel light passes through the first optical structure 1 reversely and then is converged at the focal point F.

The second optical structure 2 is obliquely arranged on the horizontal plane where the optical axis is located, and the second optical structure 2 is formed by stretching a parabola which is positioned at a point F along the normal direction of the plane.

Referring to fig. 12, since the focal length of the second optical structure 2 is greater than that of the first optical structure 1, after the light at the focal point sequentially passes through the first optical structure 1 and the second optical structure 2, a single-pixel light pattern with narrow left and right and wide up and down can be obtained under the alignment correction effect of the first optical structure 1 and the second optical structure 2, so that the light pattern can be more suitable for an adaptive high beam system (ADB).

The vehicle lamp provided by the second aspect of the utility model adopts the refractive and reflective optical system according to any embodiment of the utility model, so that the vehicle lamp also has the advantages.

The vehicle provided by the third aspect of the utility model adopts the vehicle lamp according to any embodiment of the utility model, so that the vehicle has the advantages.

In the description of the present utility model, reference to the terms "one embodiment," "some embodiments," "an implementation," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In the present utility model, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited thereto. Within the scope of the technical idea of the utility model, a plurality of simple variants of the technical proposal of the utility model can be carried out, comprising that each specific technical feature is combined in any suitable way, and in order to avoid unnecessary repetition, the utility model does not need to be additionally described for various possible combinations. Such simple variations and combinations are likewise to be regarded as being within the scope of the present disclosure.

Claims (10)

1. The refraction and reflection optical system is characterized by comprising a first optical structure (1) and a second optical structure (2), wherein the first optical structure (1) and the second optical structure (2) are sequentially arranged along the light emitting direction of a light source, the first optical structure (1) has a first collimation direction, the second optical structure (2) has a second collimation direction, the first optical structure (1) is a refraction optical structure, the second optical structure (2) is a reflection optical structure, the first optical structure (1) has a unique focus, and the unique focus of the first optical structure (1) is a system focus; the contour line of the first optical structure (1) is rotated around an axis at the focal point to obtain the first optical structure (1).

2. The refractive and reflective optical system according to claim 1, wherein the second optical structure (2) is a parabola in a vertical plane parallel to the optical axis, which is formed by stretching along a normal direction of the vertical plane, and a focal point of the parabola coincides with a focal point of the first optical structure (1).

3. The refractive and reflective optical system according to claim 2, wherein in the vertical plane, a parallel light ray is adapted to converge at the focal point after passing back through the second optical structure (2), the first optical structure (1).

4. A refractive and reflective optical system according to claim 3, characterized in that the first optical structure (1) is adapted to collimate an incident light ray in a horizontal direction, the second optical structure (2) is adapted to collimate the incident light ray in a vertical direction, and the focal length of the first optical structure (1) is smaller than the focal length of the second optical structure (2).

5. The refractive-reflective optical system according to claim 4, wherein the first optical structure (1) includes a first light-incident surface (11) and a first light-emergent surface (12), the first light-incident surface (11) protrudes in a light-source light-emergent direction to form an arc-shaped first light-incident surface (11), and the first light-emergent surface (12) protrudes in the optical axis direction to form an arc-shaped first light-emergent surface (12); the second optical structure (2) is provided with an arc-shaped reflecting surface (21), and a reflecting film or a total reflecting surface is plated outside the reflecting surface (21).

6. The refractive-reflective optical system according to claim 4, wherein the first optical structure (1) and the second optical structure (2) are integrated into a third optical structure (3), the third optical structure (3) includes a third light-in surface (31) and a third light-out surface (32), the third light-in surface (31) protrudes along the light-out direction of the light source to form an arc-shaped third light-in surface (31), the third light-out surface (32) is provided with an arc-shaped, and the third light-out surface is plated with a reflective film or is internally totally reflective.

7. The refractive and reflective optical system according to claim 1, characterized in that the first optical structure (1) is adapted to collimate light in a vertical direction, the second optical structure (2) is adapted to collimate light in a horizontal direction, and the focal length of the first optical structure (1) is smaller than the focal length of the second optical structure (2).

8. The refractive and reflective optical system according to claim 7, wherein the second optical structure (2) is disposed obliquely to the optical axis, and the second optical structure (2) is formed by stretching a parabola lying in a horizontal plane along the axis of rotation of the first optical structure; the contour of the first optical structure (1) rotates around an axis passing through the focal point and parallel to the stretching direction of the second optical structure (2) to form the first optical structure (1), and in a vertical plane, a beam of parallel light is converged at the focal point of the system after reversely passing through the first optical structure (1).

9. A vehicle lamp, characterized in that the refractive-reflective optical system according to any one of claims 1 to 8 is employed.

10. A vehicle employing the lamp of claim 9.