A reflective optical system, vehicle lamp and vehicle

Abstract

The utility model belongs to the technical field of car light, specifically relates to a reflection type optical system, car light and vehicle, wherein the reflection type optical system includes: light source, and the primary optical department, the first refractive imaging part and the second reflection imaging part that set gradually in the light path of light ray that light source sent, the primary optical department is used for converging the light ray that light source sent in focus point F area or forms light distribution in the focal plane where focus point F is located, the first refractive imaging part is used for imaging the light distribution formed in focus point F area or in the focal plane where focus point F is located in the first direction, the second reflection imaging part includes conical reflection surface, and the conical reflection surface is used for imaging the light distribution formed in focus point F area or in the focal plane where focus point F is located in the second direction, and the first direction and the second direction are perpendicular to each other. The utility model has the effect that can satisfy the small opening flat modeling demand, can realize the oblique adaptation and the optical design is simple and convenient.

Description

Technical Field

[0001] This utility model relates to the field of vehicle lighting technology, and in particular to a reflective optical system, a vehicle lighting system, and a vehicle. Background Technology

[0002] In current automotive lighting design, headlights, as a key component ensuring driving safety, have their light-emitting unit structure and performance directly impacting lighting effects and the overall vehicle styling harmony. Headlight light-emitting unit design exhibits a clear technological trend: the application of lens structures is becoming increasingly widespread, while the adoption rate of traditional reflector structures continues to decline. Even in some headlight designs that still use reflectors, the inherent structural defects of traditional reflectors significantly limit their application. To meet basic light-emitting performance requirements, traditional reflectors need a large light-emitting aperture. However, an excessively large aperture cannot accommodate a flat vehicle shape. To fit the overall vehicle styling requirements, traditional reflectors need to be installed at a certain angle. Since the optical surface design of traditional reflectors is based on a forward-facing installation scenario, tilting them can lead to problems such as optical axis misalignment, requiring complex optical compensation designs for adjustment. Utility Model Content

[0003] The technical problem to be solved by this utility model is: in order to solve the technical problem in the prior art that the light emission opening needs to be designed to be large in size and the tilt design is difficult when using a reflector as the light emission unit, this utility model provides a reflective optical system, a car lamp and a vehicle that can meet the requirements of small opening and flat shape, and can also achieve tilt adaptation and simple optical design.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a reflective optical system, comprising: a light source, and a primary optical unit, a first-order refractive imaging unit, and a second-order reflective imaging unit sequentially arranged on the light emission path of the light emitted by the light source. The primary optical unit is used to focus the light emitted by the light source onto the focal point F region or to form a light distribution on the focal plane where the focal point F is located; The first-level refractive imaging unit is used to image the light distribution formed in the focal F region or the focal plane where the focal F is located in the first direction. The secondary reflection imaging unit includes a conical reflecting surface, which is used to image the light distribution formed in the focal region F or the focal plane where the focal region F is located in the second direction. The first direction and the second direction are perpendicular to each other. The specific technical effects are as follows: the secondary reflection imaging unit adopts a conical reflective surface, utilizing the characteristics of the conical surface as a light-emitting unit to naturally form an inclined shape; the primary refractive imaging unit first collimates the light in the horizontal direction, thus the size of the light reaching the secondary reflection imaging unit in the horizontal direction is relatively small. Through the cooperation of the primary refractive imaging unit and the conical secondary reflection imaging unit, the size of the light-emitting opening can be significantly reduced compared to traditional reflectors. Traditional solutions use a single reflector to complete imaging in all directions, and in this case, the size of the light reaching the reflector in the horizontal direction is much larger than that of this invention.

[0005] Furthermore, the conical reflective surface has a rotation axis L, and the outline of the conical reflective surface in the horizontal plane is a generatrix l1. The generatrix l1 and the rotation axis L have an angle, and the generatrix l1 rotates around the rotation axis L to form the conical reflective surface.

[0006] Furthermore, the first-stage refractive imaging unit has a real focal line L1, which is coincident with the rotation axis L and passes through the focal point F. The first-stage refractive imaging unit has a contour line l2 in the horizontal plane, which has a focal point F. The contour line l2 is rotated around the real focal line L1 to form the first-stage refractive imaging unit.

[0007] Furthermore, the first-stage refractive imaging unit has a virtual focal line L2, which is coincident with the rotation axis L. The virtual focal line L2 is a straight line and is located in the negative direction of light emission from the focal point F. Light rays emitted from the focal point F are refracted and emitted by the first-stage refractive imaging unit, and the backward extensions of the refracted light rays converge at the virtual focal line L2.

[0008] Furthermore, the reflective optical system also includes a cutoff line optics section located between the primary optics section and the first-order refractive imaging section. The cutoff line optics section is a surface with a cutoff line shape. The surface with the cutoff line shape has a reflective or non-reflective function. When the surface with the cutoff line shape has a reflective function, a portion of the light from the primary optics section is totally internally reflected to reach the first-order refractive imaging section, and then refracted by the first-order refractive imaging section to reach the second-order reflective imaging section. When the surface with the cutoff line shape has a non-reflective function, the surface with the cutoff line shape provides a cutoff line shape.

[0009] Furthermore, the primary optical component is a condenser, a mirror, a lens, or an optical unit capable of achieving the desired light distribution.

[0010] Furthermore, the primary refractive imaging unit includes an incident light section and an exit light section, and the outlines of the incident light section and the exit light section are arranged in concentric circles in a plane perpendicular to the first direction.

[0011] Furthermore, the reflective optical system also includes a total internal reflection optical unit, which is located between the primary optical section and the first-order refractive imaging section. The light emitted by the light source is initially shaped by the primary optical section and then directed towards the total internal reflection optical unit. After being totally reflected by the total internal reflection optical unit, the light is directed towards the first-order refractive imaging section. After being refracted by the first-order refractive imaging section, the light is directed towards the second-order reflective imaging section and then emitted after being reflected by the second-order reflective imaging section. The light emission direction of the primary optical section is the same as the light emission direction of the light emitted after being reflected by the second-order reflective imaging section.

[0012] A vehicle light, comprising a reflective optical system as described in any of the preceding claims.

[0013] A vehicle, comprising one of the aforementioned vehicle lights.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This invention employs a combination of a primary refractive imaging unit and a conical secondary reflective imaging unit, which can significantly reduce the size of the light-emitting aperture compared to traditional reflectors. The natural structural characteristics of the conical reflective surface give it the advantage of adapting to tilted shapes. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the structure of a reflective optical system according to Embodiment 2 of this utility model.

[0017] Figure 2 This is a schematic diagram illustrating the principle of light propagation in a horizontal plane in Example 2.

[0018] Figure 3 This is a schematic diagram of the structure of a reflective optical system according to Embodiment 3 of this utility model.

[0019] Figure 4 This is a schematic diagram of the structure of a reflective optical system according to Embodiment 4 of this utility model.

[0020] Figure 5 This is a schematic diagram of the structure of a reflective optical system according to Embodiment 5 of this utility model.

[0021] Figure 6 This is a diagram of the low beam pattern of this utility model.

[0022] In the diagram: 1. Light source; 2. Primary optics; 3. First-order refractive imaging unit; 301. Light-entry unit; 302. Light-exit unit; 4. Second-order reflection imaging unit; 5. Cut-off line optics; 6. Total internal reflection optics unit. Detailed Implementation

[0023] 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.

[0024] 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.

[0025] 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.

[0026] Example 1: A reflective optical system, comprising: a light source 1, and a primary optical section 2, a first-order refractive imaging section 3, and a second-order reflective imaging section 4 sequentially disposed along the light path of the light emitted from the light source 1. The light source 1 is located at the focal point of the primary optical section 2 or at a certain distance from the focal point. The primary optical section 2 is used to converge the light emitted from the light source 1 to the focal point F region or to form a light distribution on the focal plane where the focal point F is located. The first-order refractive imaging section 3 is used to image the light distribution formed in the focal point F region or on the focal plane where the focal point F is located in a first direction. The second-order reflective imaging section 4 includes a conical reflecting surface, which is used to image the light distribution formed in the focal point F region or on the focal plane where the focal point F is located in a second direction. The first direction and the second direction are perpendicular to each other. Specifically, in this embodiment, the first direction is horizontal and the second direction is vertical.

[0027] Example 2, as Figures 1 to 2As shown, in this embodiment, compared to embodiment 1, the reflective optical system also includes a cutoff line optical section 5. This is because when the reflective optical system of this invention is applied to near beam or partial far beam functions, it needs to have a bright or dark cutoff line. The cutoff line optical section 5 is located between the primary optical section 2 and the first-stage refractive imaging section 3. The cutoff line optical section 5 is a surface with a cutoff line shape. In this embodiment, the primary optical section 2, the cutoff line optical section 5, and the first-stage refractive imaging section 3 are integrated into a thick-walled structure. That is to say, after the light emitted by the light source 1 is initially shaped by the primary optical section 2, part of the light reaches the surface with a cutoff line shape and undergoes internal total internal reflection before reaching the first-stage refractive imaging section 3. It is then refracted and emitted by the first-stage refractive imaging section 3. Another part of the light directly reaches the first-stage imaging section and is refracted and emitted by the first-stage refractive imaging section 3. Both parts of the light reach the second-stage reflective imaging section 4 after being refracted by the first-stage refractive imaging section 3. After being reflected by the second-stage reflective imaging section 4, they are emitted, projecting the required light distribution.

[0028] In a preferred embodiment, the cutoff line optics 5 can be a separate component.

[0029] It should be noted here that: the surface with the cutoff line shape has a reflective or non-reflective function. When the surface with the cutoff line shape has a reflective function, a reflective film is provided on the surface with the cutoff line shape, so that a portion of the light from the primary optical unit 2 is totally internally reflected and reaches the first-stage refractive imaging unit 3, and then reaches the second-stage reflective imaging unit 4 after being refracted by the first-stage refractive imaging unit 3; when the surface with the cutoff line shape has a non-reflective function (i.e., it only has a light-blocking function), the surface with the cutoff line shape provides the cutoff line shape.

[0030] In this embodiment, the primary optical unit 2 is a condenser, a reflector, a lens, or an optical unit capable of achieving the desired light distribution.

[0031] In a preferred embodiment, the primary optical unit 2 and the first-level refractive imaging unit 3 can correspond one-to-one, or a single first-level refractive imaging unit 3 can correspond to multiple primary optical units 2.

[0032] In this embodiment, the conical reflective surface has a rotation axis L, and the outline of the conical reflective surface in the horizontal plane is a generatrix l1. The generatrix l1 and the rotation axis L have an angle. The generatrix l1 rotates around the rotation axis L to form a conical reflective surface. The conical reflective surface can realize collimation imaging of light emitted from the rotation axis L in the vertical direction.

[0033] Specifically, the angle between the busbar l1 and the rotating shaft L can be adjusted according to requirements, and the preferred angle is 45°.

[0034] More specifically, the focal length of the secondary reflection imaging unit 4 can be changed by adjusting the distance between the generatrix l1 and the rotation axis L.

[0035] In this embodiment, the first-stage refractive imaging unit 3 has a real focal line L1, which is coincident with the rotation axis L and passes through the focal point F. The first-stage refractive imaging unit 3 has a contour line l2 in the horizontal plane, and the contour line l2 has a focal point F. The contour line l2 rotates around the horizontal axis (i.e., the real focal line L1) of the focal point F to form the first-stage refractive imaging unit 3. In other words, the first-stage refractive imaging unit 3 has an arc-shaped contour line in the normal direction of the imaging direction. Therefore, the first-stage refractive imaging unit 3 can achieve collimated imaging of light at or near point F.

[0036] Therefore, the primary refractive imaging unit 3 and the secondary reflective imaging unit 4 are responsible for collimation imaging in different directions, and together they constitute the imaging part of the entire optical system and together form the focal point of the optical system, namely the focal point F.

[0037] Example 3, as Figure 3 As shown, the difference from Example 2 is that: The primary optical section 2, the cutoff line optical section 5, and the first-stage refractive imaging section 3 are arranged in a separate structure. At this time, the first-stage refractive imaging section 3 includes an incident light section 301 and an exit light section 302. In a plane perpendicular to the first direction (that is, in a vertical plane), the outlines of the incident light section 301 and the exit light section 302 are arranged in concentric circles.

[0038] Example 4, as Figure 4 As shown in Embodiments 1 to 3, all components are arranged sequentially in a horizontal plane. Therefore, the required horizontal space is relatively large, which may not be suitable for vehicle lights with smaller horizontal space. Therefore, in this embodiment, the reflective optical system also includes a total internal reflection optical unit 6, which is located between the primary optical unit 2 and the first-stage refractive imaging unit 3. The final light emission direction is defined as Z, the horizontal direction as X, and the vertical direction as Y. In this embodiment, the light emission direction of the primary optical unit 2 is towards the Z direction. The light emitted by the light source 1 is initially shaped by the primary optical unit 2 and then shines towards the total internal reflection optical unit 6. After total internal reflection by the total internal reflection optical unit 6, it shines towards the first-stage refractive imaging unit 3. After refraction by the first-stage refractive imaging unit 3, it shines towards the second-stage reflective imaging unit 4 and is then reflected by the second-stage reflective imaging unit 4 before exiting. Therefore, compared with Embodiments 1 to 3, this embodiment can reduce the space occupied by the entire reflective optical system in the X direction.

[0039] In this embodiment, the focal line L1 of the first-stage refractive imaging unit 3 can be set between the primary optical unit 2 and the total internal reflection optical unit 6. At this time, the focal line of the second-stage reflection imaging unit 4 is the focal line formed by mirroring the focal line L1 of the first-stage refractive imaging unit 3 along the total internal reflection optical unit 6. That is, the rotation axis L of the conical reflecting surface and the focal line L1 coincide along the focal line mirrored by the total internal reflection optical unit 6. Alternatively, the focal line L1 of the first-stage refractive imaging unit 3 is disposed between the total internal reflection optical unit 6 and the first-stage refractive imaging unit 3, in which case the rotation axis L of the conical reflecting surface coincides with the focal line L1.

[0040] Example 5, as Figure 5 As shown, the difference from Embodiment 4 is that: the first-stage refractive imaging unit 3 has a virtual focal line L2, which is coincident with the rotation axis L. The first-stage refractive imaging unit 3 has a contour line l2 in the horizontal plane. The contour line l2 has a collimating effect on the light emitted from the focal point F in the horizontal direction. In the vertical direction, the light emitted from the focal point F is refracted and emitted by the first-stage refractive imaging unit 3. The backward extension of the refracted light converges at the virtual focal line L2. The virtual focal line L2 is a straight line and is located in the negative direction of light emission from the focal point F.

[0041] Specifically, in this embodiment, the primary optical unit 2, the total internal reflection optical unit 6, the cutoff line optical unit 5, and the first-stage refractive imaging unit 3 can be integrated into one structure or can be separate structures. When they are separate structures, the first-stage refractive imaging unit 3 can include an incident light unit 301 and an exit light unit 302 as shown in Embodiment 3.

[0042] A vehicle headlight, wherein a reflective optical system comprising any one of the above-mentioned features is included.

[0043] A vehicle, comprising one of the aforementioned vehicle lights.

[0044] Compared with the prior art, the beneficial effects of this utility model are: This invention employs a combination of a primary refractive imaging unit and a conical secondary reflective imaging unit, which can significantly reduce the size of the light-emitting aperture compared to traditional reflectors. The natural structural characteristics of the conical reflective surface give it the advantage of adapting to tilted shapes.

[0045] 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. A reflective optical system, characterized in that, include: The light source (1) includes a primary optical unit (2), a first-order refractive imaging unit (3), and a second-order reflective imaging unit (4), which are sequentially arranged on the light path of the light emitted from the light source (1). The primary optical unit (2) is used to focus the light emitted by the light source (1) onto the focal point F region or to form a light distribution on the focal plane where the focal point F is located; The first-level refractive imaging unit (3) is used to image the light distribution formed in the focal F region or the focal plane where the focal F is located in the first direction; The secondary reflection imaging unit (4) includes a conical reflecting surface, which is used to image the light distribution formed in the focal area F or the focal plane where the focal point F is located in the second direction. The first direction and the second direction are perpendicular to each other.

2. The reflective optical system as described in claim 1, characterized in that, The conical reflective surface has a rotation axis L, and the outline of the conical reflective surface in the horizontal plane is a generatrix l1. The generatrix l1 and the rotation axis L have an angle between them, and the generatrix l1 rotates around the rotation axis L to form the conical reflective surface.

3. A reflective optical system as described in claim 2, characterized in that, The first-stage refractive imaging unit (3) has a real focal line L1, which is coincident with the rotation axis L and passes through the focal point F. The first-stage refractive imaging unit (3) has a contour line l2 in the horizontal plane, which has a focal point F. The contour line l2 rotates around the real focal line L1 to form the first-stage refractive imaging unit (3).

4. A reflective optical system as described in claim 2, characterized in that, The first-stage refractive imaging unit (3) has a virtual focal line L2, which is coincident with the rotation axis L. The virtual focal line L2 is a straight line and is located in the negative direction of light emission from the focal point F. The light emitted from the focal point F is refracted and emitted by the first-stage refractive imaging unit (3), and the backward extension of the refracted light converges at the virtual focal line L2.

5. A reflective optical system as described in claim 1, characterized in that, The reflective optical system also includes a cutoff line optical section (5), which is located between the primary optical section (2) and the first-order refractive imaging section (3). The cutoff line optical section (5) is a surface with a cutoff line shape. The surface with a cutoff line shape has a reflective or non-reflective function. When the surface with a cutoff line shape has a reflective function, a portion of the light from the primary optical section (2) is totally internally reflected and reaches the first-order refractive imaging section (3), and after being refracted by the first-order refractive imaging section (3), it reaches the second-order reflective imaging section (4). When the surface with a cutoff line shape has a non-reflective function, the surface with a cutoff line shape provides a cutoff line shape.

6. A reflective optical system as described in claim 1, characterized in that, The primary optical unit (2) is a condenser, a mirror, a lens, or an optical unit capable of achieving the desired light distribution.

7. A reflective optical system as described in claim 1, characterized in that, The first-level refractive imaging unit (3) includes an incident light part (301) and an exit light part (302), and the outlines of the incident light part (301) and the exit light part (302) are arranged in concentric circles in a plane perpendicular to the first direction.

8. A reflective optical system as described in claim 1, characterized in that, The reflective optical system also includes a total internal reflection optical unit (6), which is located between the primary optical unit (2) and the first-order refractive imaging unit (3). The light emitted by the light source (1) is initially shaped by the primary optical unit (2) and then shines on the total internal reflection optical unit (6). After being totally reflected by the total internal reflection optical unit (6), the light shines on the first-order refractive imaging unit (3). After being refracted by the first-order refractive imaging unit (3), the light shines on the second-order reflective imaging unit (4). After being reflected by the second-order reflective imaging unit (4), the light is emitted. The light emission direction of the primary optical unit (2) is the same as the light emission direction of the light emitted after being reflected by the second-order reflective imaging unit (4).

9. A vehicle light, characterized in that, Includes a reflective optical system as described in any one of claims 1-8.

10. A vehicle, characterized in that, Including the vehicle light described in claim 9.

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