CN220228857U - Refractive optical unit and vehicle lamp - Google Patents
Refractive optical unit and vehicle lamp Download PDFInfo
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- CN220228857U CN220228857U CN202321826276.6U CN202321826276U CN220228857U CN 220228857 U CN220228857 U CN 220228857U CN 202321826276 U CN202321826276 U CN 202321826276U CN 220228857 U CN220228857 U CN 220228857U
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Abstract
The utility model relates to the field of car lamp illumination, and discloses a refraction optical unit and a car lamp, which comprise a first optical structure and a second optical structure, wherein the first optical structure and the second optical structure are sequentially arranged along the optical axis direction, the first optical structure is formed by rotating around an axis positioned at a focus of the first optical structure, the first optical structure is provided with a unique focus, the first optical structure is suitable for correcting collimation of light rays in a first direction, the second optical structure is provided with a focal line in a second direction, the first direction and the second direction are mutually perpendicular, when light rays emitted by a point light source positioned at the focus sequentially pass through the first optical structure and the second optical structure, the light rays are mutually parallel and are emitted, the second optical structure can accurately determine the position of the focal line and image the light rays positioned at the focus, and the focal line of the second optical structure is positioned at a system focus, so that a very clear near light cut-off line shape can be obtained.
Description
Technical Field
The utility model relates to the technical field of car lamp illumination, in particular to a refraction optical unit. In addition, the utility model also relates to a car lamp.
Background
In a conventional optical system for imaging by using a lens, the lens is a ball lens, and has only one focal point, a single focal length, and the imaging light is imaged at the focal point, and the imaged light pattern is isotropic, i.e., the width of the light pattern is consistent with the angle of the vertical direction. Currently, a bifocal lens solution has been iterated, i.e. a lens unit with collimation in a first direction and a lens unit with collimation in a second direction, the first and second directions being orthogonal; the collimating lens units are provided with focal lines, the focal lines are straight lines, quasi-straight lines or curves, and the focal lines of the two lens units jointly act to form a focal area of the system; the finally imaged light pattern exhibits anisotropy, i.e., the width of the light pattern from side to side and the angle in the up-down direction are not uniform. The ideal light pattern of the low beam and the high beam is wide in the left and right directions, narrow in the up and down directions, and the ideal light pattern of the ADB single pixel is narrow in the left and right directions, wide in the up and down directions. The focal lengths of the lens units in different collimation directions can be flexibly adjusted with little effect on the other direction.
For low beam, the lens needs to precisely image the light at the focus to obtain a clear cut-off line shape; the imaging principle of the existing bifocal lens is as follows: the focal line of the lens unit in the first direction is positioned near the system focus area, the focal line of the lens unit in the second direction is also positioned near the system focus area, and the two focal lines are mutually orthogonal and act together to image the light of the system focus area.
When the focuses of the first collimating part and the second collimating part are arranged at the system focus position, a beam of parallel light reversely passes through the first collimating part, and then the light is converged at the system focus; however, if a beam of parallel light passes through the second collimating part and the first collimating part in reverse in sequence, the light is not converged at the focus of the system, but deviates from a certain distance, and the size of the deviation is determined by the thickness of the first collimating part, so that defocusing is caused; for low beam, the cut-off line may be unclear.
The reason for the occurrence of the above problems is that: after the parallel light reversely passes through the second collimating lens unit, the light rays undergo primary refraction, which means that the light rays do not enter in parallel any more but enter the first collimating lens unit at a certain angle, secondary refraction occurs in the first collimating lens unit, certain deviation exists between the incident light rays and the emergent light rays of the first collimating lens unit, 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 optical unit to meet the practical requirements.
Disclosure of Invention
In view of the above-mentioned technical problem, a first aspect of the present utility model provides a refractive optical unit capable of ensuring that an optical system is not out of focus and obtaining a clear cutoff shape for near light.
In order to solve the above-mentioned technical problem, a first aspect of the present utility model provides a refractive optical unit, including a first optical structure and a second optical structure, where the first optical structure and the second optical structure are sequentially arranged along an optical axis direction, the first optical structure is formed by rotating around an axis located at a focal point of the first optical structure, and the first optical structure has a unique focal point, the first optical structure is adapted to correct light collimation in a first direction, and the second optical structure has a focal line in a second direction, and the first direction and the second direction are mutually perpendicular.
Preferably, the second optical structure is formed by stretching or sweeping along a normal to a plane in which the contour line lies, and the second optical structure has a straight or curved focal line located at the focal point.
It is further preferred that the incident light rays emitted via the focal point are adapted to pass through the first optical structure and to exit via the second optical structure, which is adapted to collimate the incident light rays to exit in parallel.
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 such that the incident light is emitted in parallel in a vertical plane parallel to the optical axis, 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 is adapted to collimate the incident light in a vertical direction, the second optical structure is adapted to collimate the incident light in a horizontal direction such that the incident light exits in parallel in the horizontal plane, 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 optical axis direction to form an arc-shaped first light incident surface, and the first light emergent surface protrudes along the optical axis direction to form an arc-shaped first light emergent surface; the second optical structure comprises a second light incident surface and a second light emergent surface, the second light incident surface is perpendicular to the optical axis direction, and the second light emergent surface protrudes along the optical axis direction to form an arc-shaped second light emergent 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 optical axis direction to form an arc-shaped third light incident surface, and the third light emergent surface protrudes along the optical axis direction to form an arc-shaped third light emergent surface.
A second aspect of the utility model provides a vehicle lamp comprising a refractive optical unit according to the first aspect of the utility model.
According to the preferable technical scheme, the refractive optical unit is formed by sequentially arranging the first optical structure and the second optical structure along the optical axis direction, the first optical structure is formed by rotating around the axis positioned at the focal point of the first optical structure and is provided with a unique focal point, and after light rays emitted by the point light source positioned at the focal point sequentially pass through the first optical structure and the second optical structure, the light rays are emitted in parallel, wherein the first optical structure hardly plays any role in the direction of the light rays, the second optical structure can accurately determine the focal point and image the light rays at the focal point, and the focal line of the second optical structure is positioned at the focal point, so that a very clear near light cut-off line shape can be obtained.
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 optical unit according to embodiment 1 of the present utility model;
fig. 2 is a light path diagram of a refractive optical unit according to embodiment 1 of the present utility model;
FIG. 3 is a light path diagram of another refractive optical element according to embodiment 1 of the present utility model;
fig. 4 is a schematic structural view of a refractive optical unit according to embodiment 2 of the present utility model;
fig. 5 is a light path diagram of a refractive optical unit according to embodiment 2 of the present utility model;
FIG. 6 is a light path diagram of another refractive optical element according to embodiment 2 of the present utility model;
FIG. 7 is a low beam pattern formed by a refractive optical element according to an embodiment of the present utility model;
fig. 8 is a schematic structural view of a refractive optical unit according to embodiment 3 of the present utility model;
fig. 9 is a light path diagram of a refractive optical unit according to embodiment 3 of the present utility model;
fig. 10 is a light path diagram of another refractive optical unit of embodiment 3 of the present utility model;
fig. 11 is a schematic structural view of a refractive optical unit according to embodiment 4 of the present utility model;
fig. 12 is a light path diagram of a refractive optical unit according to embodiment 4 of the present utility model;
fig. 13 is a light path diagram of another refractive optical unit of embodiment 4 of the present utility model;
fig. 14 is an ADB light pattern formed by a refractive optical unit according to an 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 and second light-entering surface
22. The second light-emitting surface 31 and the third light-entering surface
32. Third light-emitting 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 optical unit according to an 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 arranged along an optical axis direction, and the first optical structure 1 is formed by rotating around an axis located at a focal point thereof and has a unique focal point. The first optical structure 1 has a first direction, the second optical structure 2 has a focal line in a second direction, and the first direction and the second direction are perpendicular to each other, wherein the first direction and the second direction can be vertical direction or horizontal direction.
Specifically, the second optical structure 2 is formed by stretching or sweeping along the normal of the plane in which the contour line lies, and the second optical structure 2 has a straight or curved focal line located at the focal point.
Example 1
Referring to fig. 2 to 3, the first optical structure 1 and the second optical structure 2 are sequentially arranged along the optical axis direction, and the first optical structure 1 can calibrate the left and right light rays in each plane rotating around the horizontal axis of the focal point, the second optical structure 2 can calibrate the light rays in the vertical direction, in the vertical plane, the emergent angle of the light rays emitted from the focal point is hardly changed after passing through the first optical structure 1, and when the incident light rays pass through the second optical structure 2, the second optical structure 2 can collimate and correct Cheng Pinghang light rays in the vertical direction for the incident light rays passing through the second optical structure 2.
In this embodiment, 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, the first light incident surface 11 is recessed along the optical axis direction to form an arc-shaped first light incident surface 11, and the first light emergent surface 12 is protruded along the optical axis direction to form an arc-shaped first light emergent surface 12; the second optical structure 2 includes a second light incident surface 21 and a second light emergent surface 22, the second light incident surface 21 is perpendicular to the optical axis direction, and the second light emergent surface 22 protrudes along the optical axis direction to form an arc-shaped second light emergent surface 22.
The optical principle of the first optical structure 1 is as follows: the first optical structure 1 is obtained by rotation of its contour in a horizontal plane about a horizontal axis passing through the focal point. In the horizontal plane, after the point light source at the focus passes through the first optical structure 1, the first optical structure 1 can perform collimation correction on the light at the focus in the horizontal direction, and in the vertical plane parallel to the optical axis, after the point light source at the focus passes through the first optical structure 1, the propagation direction of the light is not changed.
The optical principle of the second optical structure 2 is: the focal point of the contour of the second optical structure 2 in a vertical plane parallel to the optical axis coincides with the focal point of the first optical structure 1, the contour of which is formed by stretching or sweeping along the normal direction, and therefore the second optical structure 2 has a straight or curved focal line at the focal point. And in the vertical plane parallel to the optical axis, after the point light source at the focus passes through the second optical structure 2, the second optical structure 2 can collimate and correct the light rays emitted from the focus in the vertical direction and then emit the collimated light rays in parallel.
The focal line position of the second optical structure 2 is set at the focal point, so that in a vertical plane parallel to the optical axis, the emergent direction of the light emitted by the light source at the focal point is not changed after passing through the first optical structure 1, and then the light can be emitted in parallel after passing through the second optical structure 2, so that in the vertical direction, the first optical structure 1 does not act on the propagation direction of the light, and the second optical structure 2 can accurately image the light emitted by the light source at the focal point.
Referring to fig. 8, specifically, the focal length of the first optical structure 1 is smaller than that of the second optical structure 2, so that a light type with wide left and right, narrow upper and lower can be formed after the light source at the focal point is emitted, and in addition, since the first optical structure 1 is formed to rotate around the axis at the focal point, and in addition, the focal line of the second optical structure 2 is precisely located at the focal point, a very clear horizontal bottom of the low beam cutoff can be obtained.
Example 2
Referring to fig. 4 to 6, 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 incident surface 31 and a third light emergent surface 32, the third light incident surface 31 protrudes in the optical axis direction to form an arc-shaped third light incident surface 31, and the third light emergent surface 32 protrudes in the optical axis direction to form an arc-shaped third light emergent surface 32.
The first optical structure 1 and the second optical structure 2 employed include at least the following morphological structures.
In the first structure, 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 incident surface 31 and a third light emergent surface 32, the third light incident surface 31 protrudes into an arc-shaped third light incident surface 31 along the optical axis direction, and the third light emergent surface 32 protrudes into an arc-shaped third light emergent surface 32 along the direction.
The first optical structure 1 is formed by a rotation of the contour line in the horizontal plane about a horizontal axis passing through the focal point as a third light entrance surface 31 of the third optical structure 3 and it also has a unique focal point. In a vertical plane parallel to the optical axis, the second optical structure 2 has a curved focal line at the focal point, which is drawn or swept along the normal direction to form a third light exit surface 32.
Example 3
Referring to fig. 8 to 10, 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 contour line in the vertical plane rotates around the vertical axis at the focal point to form the first optical structure 1. In the vertical plane, the light rays emitted by the point light source at the focus pass through the first optical structure 1 and are mutually parallel to be emitted; in the horizontal plane, after the light rays emitted by the point light source at the focus pass through the first optical structure 1, the propagation direction of the light rays is not changed; the first optical structure 1 is capable of performing a collimation correction function in the vertical direction for light at the focal point.
The contour line lying in the horizontal plane stretches or sweeps along the normal direction forming the second optical structure 2, and the focal point of the second optical structure 2 is located at the system focal point F. When the light rays emitted by the point light source positioned at the focus are positioned in the horizontal plane, the light rays are emitted in parallel after passing through the second optical structure 2, and the second optical structure 2 can calibrate the collimation of the light rays at the focus in the horizontal direction.
And in the horizontal plane, since the first optical structure 1 has little deflection effect on the light at the focus, the light at the focus can be accurately collimated by the second optical structure 2 only, i.e. the focal line of the second optical structure 2 can be accurately located at the focus.
In this embodiment, the first optical structure 1 and the second optical structure 2 used may be a split type structure of the first optical structure 1 and the second optical structure 2 used in embodiment 1.
Example 4
Referring to fig. 11 to 13, the first optical structure 1 still collimates light in a vertical direction, and the second optical structure 2 collimates light in a left-right direction, and the present solution can also be implemented by a single lens (i.e. integrating the first optical structure 1 with the second optical structure 2). Namely, the first optical structure 1 serves as the light incident surface of the single lens, and the second optical structure 2 serves as the light emergent surface of the single lens.
The first optical structure 1 is formed by a rotation of the contour line about a horizontal axis passing through the focal point, and the first optical structure 1 has a unique focal point and is located at the focal point of the system. The first optical structure 1 is the light incident surface of the formed single lens; the contour line in the horizontal plane is stretched or swept along the normal direction to form a second optical structure 2, the second optical structure 2 has a focal line in the vertical direction, the focal line is located at the system focus F, and the second optical structure 2 is the light emitting surface of the single lens.
In this embodiment, the first optical structure 1 and the second optical structure 2 used may be integrated with each other in the first optical structure 1 and the second optical structure 2 used in embodiment 2.
Referring to fig. 14, in addition, 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, the light patterns with narrow left and right, wide up and down can be obtained under the collimation correction effect of the first optical structure 1 and the second optical structure 2, and the light pattern is suitable for an adaptive high beam system (ADB).
The vehicle lamp of the utility model adopts the refraction optical unit of any embodiment of the utility model, and therefore 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 (8)
1. The refraction optical unit 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 optical axis direction, the first optical structure (1) is formed by rotating around an axis positioned at the focus of the first optical structure (1), the first optical structure (1) is provided with a unique focus, the first optical structure (1) is suitable for correcting light collimation in a first direction, the second optical structure (2) is provided with a focal line in a second direction, and the first direction and the second direction are mutually perpendicular.
2. Refractive optical unit according to claim 1, characterized in that the second optical structure (2) is formed by stretching or sweeping along a normal to the plane of the contour line, and that the second optical structure (2) has a straight or curved focal line at the focal point.
3. Refractive optical unit according to claim 2, characterized in that the incident light rays emitted via the focal point are adapted to pass through the first optical structure (1) and to exit via the second optical structure (2), the second optical structure (2) being adapted to collimate the incident light rays to exit in parallel.
4. A refractive optical unit according to claim 3, characterized in that the first optical structure (1) is adapted to collimate the incident light in a horizontal direction, the second optical structure (2) is adapted to collimate the incident light in a vertical direction such that the incident light is emitted in parallel in a vertical plane parallel to the optical axis, and the focal length of the first optical structure (1) is smaller than the focal length of the second optical structure (2).
5. A refractive optical unit according to claim 3, wherein the first optical structure (1) is adapted to collimate the incident light in a vertical direction, the second optical structure (2) is adapted to collimate the incident light in a horizontal direction such that the incident light is emitted in parallel in a horizontal plane, and the focal length of the first optical structure (1) is smaller than the focal length of the second optical structure (2).
6. The refractive optical unit according to claim 4 or 5, wherein the first optical structure (1) includes a first light-in surface (11) and a first light-out surface (12), the first light-in surface (11) protruding in the optical axis direction to form an arc-shaped first light-in surface (11), the first light-out surface (12) protruding in the optical axis direction to form an arc-shaped first light-out surface (12); the second optical structure (2) comprises a second light incident surface (21) and a second light emergent surface (22), the second light incident surface (21) is perpendicular to the optical axis direction, and the second light emergent surface (22) protrudes along the optical axis direction to form an arc-shaped second light emergent surface (22).
7. The refractive optical unit according to claim 4 or 5, wherein the first optical structure (1) is integrated with the second optical structure (2) to form 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 in the optical axis direction to form an arc-shaped third light-in surface (31), and the third light-out surface (32) protrudes in the optical axis direction to form an arc-shaped third light-out surface (32).
8. A vehicle lamp, characterized in that the refractive optical unit according to any one of claims 1 to 7 is employed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321826276.6U CN220228857U (en) | 2023-07-12 | 2023-07-12 | Refractive optical unit and vehicle lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321826276.6U CN220228857U (en) | 2023-07-12 | 2023-07-12 | Refractive optical unit and vehicle lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220228857U true CN220228857U (en) | 2023-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321826276.6U Active CN220228857U (en) | 2023-07-12 | 2023-07-12 | Refractive optical unit and vehicle lamp |
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|---|---|
| CN (1) | CN220228857U (en) |
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- 2023-07-12 CN CN202321826276.6U patent/CN220228857U/en active Active
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