Front light optical system with micro opening size

Abstract

The utility model discloses a kind of headlamp optical systems of micro small opening size, comprising: light source, primary optical unit and imaging system;The primary optical unit is located in the light emitting direction of light source, and the primary optical unit is used to carry out preliminary shaping to the light emitted by light source;The imaging system includes first imaging unit and second imaging unit;The first imaging unit is located in the light emitting direction of primary optical unit, and first imaging unit has virtual focal line, and the light distribution of the light of preliminary shaping on the focal plane of imaging system, in one direction, collimation imaging is carried out by first imaging unit, after refraction in another direction by first imaging unit, the reverse prolongation line of light converges at virtual focal line;The second imaging unit is a unit with real focal line, and the real focal line of the second imaging unit at least with virtual focal line meets in a point, and the utility model has the advantages of satisfying small size caliber and improving light utilization.

Description

Technical Field

[0001] This utility model belongs to the field of automotive lighting technology, specifically relating to a headlight optical system with a small opening size. Background Technology

[0002] In the field of automotive lighting, in order to allow modules to be arranged in any desired shape and to provide diverse options for headlight design, optical solutions with small opening sizes are often adopted. However, existing optical solutions that place the light source at the focal point of the imaging component have low light utilization due to the excessive diffusion angle of the light source. To improve light utilization, a headlight optical system with a small opening size is proposed. Utility Model Content

[0003] This utility model aims to solve at least one of the technical problems existing in the prior art.

[0004] Therefore, this utility model proposes a headlight optical system with a small opening size, which has the advantages of meeting the requirements of small aperture size and improving light utilization.

[0005] A front light optical system with a small opening size according to an embodiment of the present invention includes: a light source, a primary optical unit, and an imaging system; the primary optical unit is located in the light emission direction of the light source and is used to preliminarily shape the light emitted by the light source; the imaging system includes a first imaging unit and a second imaging unit; the first imaging unit is located in the light emission direction of the primary optical unit, and the first imaging unit has a virtual focal line; the light distribution of the preliminarily shaped light on the focal plane of the imaging system is collimated and imaged by the first imaging unit in one direction, and after being refracted by the first imaging unit in another direction, the backward extensions of the light converge at the virtual focal line; the second imaging unit is a unit with a real focal line, and the real focal line of the second imaging unit intersects the virtual focal line at at least one point.

[0006] According to one embodiment of the present invention, the focal line of the second imaging unit is a straight line or a curve.

[0007] According to one embodiment of the present invention, the first imaging unit and the second imaging unit form an imaging system. The number of the imaging system is the same as that of the primary optical units and they correspond one-to-one, or the number of primary optical units is multiple, and multiple primary optical units correspond to one imaging system.

[0008] According to one embodiment of the present invention, the primary optical unit is one or more of a condenser, a reflector, and a lens.

[0009] According to one embodiment of the present invention, the primary optical unit and the first imaging unit are integrally formed.

[0010] According to one embodiment of the present invention, the second imaging unit is a reflector or a lens.

[0011] According to one embodiment of the present invention, a cutoff line baffle is provided between the primary optical unit and the first imaging unit.

[0012] According to one embodiment of the present invention, the first imaging unit and / or the second imaging unit are provided with diffusion patterns.

[0013] The beneficial effect of this utility model is that it uses a primary optical unit to shape the light emitted by the light source, thereby reducing the angle of light distribution. As a result, the small-sized first imaging unit can still make full use of the light emitted by the light source, thus improving the light utilization rate. The first imaging unit and the second imaging unit are used to collimate the light in two directions, so that the size of the light distribution of the final image can be set according to the requirements, such as the aspect ratio can be controlled according to the requirements. By using the first imaging unit to refract light rays into reverse extensions in another direction and converge them onto the virtual focal line, the overlap between the virtual focal line formed by the light rays and the focal point of the second imaging unit is achieved, thus ensuring the collimation effect of the second imaging unit.

[0014] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention.

[0015] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments with accompanying drawings, in which: Figure 1 This is a schematic diagram of the present invention when the primary optical unit and the first imaging unit are integrated, and multiple primary optical units correspond to one first imaging unit; Figure 2 This is a schematic diagram showing that the primary optical unit and the first imaging unit of this utility model are integrated into one unit, and that the primary optical unit and the first imaging unit correspond one-to-one. Figure 3 This is a schematic diagram of the path of light passing through the first imaging unit and the second imaging unit of this utility model; Figure 4 This is a schematic diagram of the structure of the first imaging unit of this utility model when it is a separate individual unit; Figure 5 This is a schematic diagram of the primary optical unit of this utility model being a reflector; Figure 6 This is a schematic diagram of the second imaging unit of this utility model being a reflector; Figure label: 1. Light source; 2. Primary optical unit; 3. First imaging unit; 4. Second imaging unit; 5. Cut-off line baffle; 6. Virtual focal line. Detailed Implementation

[0017] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0018] 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.

[0019] 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.

[0020] The headlight optical system with a small opening size according to an embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

[0021] like Figures 1-6As shown, the front light optical system with a small opening size according to an embodiment of the present invention includes: a light source 1, a primary optical unit 2, and an imaging system; the primary optical unit 2 is located in the light emission direction of the light source 1, and is used to preliminarily shape the light emitted by the light source 1; the imaging system includes a first imaging unit 3 and a second imaging unit 4; the first imaging unit 3 is located in the light emission direction of the primary optical unit 2, and the light distribution of the preliminarily shaped light on the focal plane of the imaging system, the first imaging unit 3 has a virtual focal line 6, which is collimated and imaged in one direction by the first imaging unit 3, and after being refracted by the first imaging unit 3 in another direction, the backward extensions of the light converge at the virtual focal line 6; the second imaging unit 4 is a unit with a real focal line, and the real focal line of the second imaging unit 4 intersects the virtual focal line 6 at least at one point.

[0022] When the primary optical unit 2 is used for high beam or low beam, it focuses the light emitted by the light source 1 near the focal area; but when it needs to be broadened, it diffuses the light distribution to a certain extent, at least in the horizontal direction.

[0023] In this embodiment, the light source 1 can be located at or near the focal point of the primary optical unit 2. The primary optical unit 2 converges the light emitted from the light source 1 to the vicinity of the focal point of the first imaging unit 3. The first imaging unit 3 is a refraction unit and a curved surface with a virtual focal line 6. The first imaging unit 3 can collimate the light distribution near its focal point in one direction, that is, it has an imaging function in one direction. In another direction, the first imaging unit 3 does not collimate the light, but rather makes the backward extensions of the refracted light in the other direction converge at the virtual focal line 6. Since the virtual focal line 6 coincides with the real focal line of the second imaging unit 4, the second imaging unit 4 can collimate the light in another direction, that is, it has an imaging function in another direction. Here, one direction and the other direction are perpendicular to each other. In this embodiment, the real focal line of the second imaging unit 4 is a straight line, which coincides with the virtual focal line 6.

[0024] The primary optical unit 2 shapes the light emitted from the light source 1, reducing the angle at which the light exits through the primary optical unit 2. This allows for smaller sizes of the corresponding first and second imaging units. Consequently, the smaller first imaging unit 3 can still fully utilize the light emitted from the light source 1, improving light utilization efficiency. Furthermore, the first imaging unit 3 and the second imaging unit 4 collimate the light in two directions, allowing the final image's light distribution size to be set according to requirements, such as the aspect ratio. However, when the first imaging unit 3 is cylindrical, the focal point of the imaging system formed by the first imaging unit 3 and the second imaging unit 4 is not precise, resulting in poor image quality. Therefore, by using the first imaging unit 3 to refract the light in another direction into a backward extension line converging on the virtual focal line 6, the overlap between the virtual focal line 6 and the focal point of the second imaging unit 4 is achieved, ensuring the collimation effect of the second imaging unit 4 and the accuracy of the imaging.

[0025] The real focal line of the second imaging unit is either a straight line or a curve.

[0026] In this embodiment, when the second imaging unit 4 is a lens, the real focal line of the second imaging unit 4 can be a straight line, a curve, or an arc; when the real focal line is a straight line, it coincides with the virtual focal line 6; when the real focal line is a curve, the real focal point of the contour line of the second imaging unit 4 in the vertical plane is located on the virtual focal line 6 of the first imaging unit 3.

[0027] The first imaging unit 3 and the second imaging unit 4 form an imaging system. The number of imaging systems is the same as that of primary optical units 2 and they correspond one-to-one, or there are multiple primary optical units 2, with multiple primary optical units 2 corresponding to one imaging system.

[0028] The number of imaging systems can also be multiple, and multiple imaging systems can be arranged according to the shape of the vehicle headlights.

[0029] The primary optical unit 2 is one or more of a condenser, a reflector, or a lens.

[0030] When the primary optical unit 2 is a condenser, such as Figure 1-2 As shown, the condenser refracts the light emitted by the light source 1 to the vicinity of the focal point of the first imaging unit 3, forming a light distribution near the focal point of the first imaging unit 3. The light is then emitted after refraction by the first imaging unit 3 and the second imaging unit 4. At this time, the light source 1, the primary optical unit 2, the first imaging unit 3, and the second imaging unit 4 are located in the same light output direction, reducing the vertical space occupied and meeting the needs of application scenarios with limited vertical space.

[0031] When the primary optical unit 2 is a reflector, the light source 1 can be located below the primary optical unit 2. The light output direction can be adjusted through the primary optical unit 2, thus shortening the overall horizontal dimension and meeting the application scenarios with small horizontal space.

[0032] When the primary optical unit 2 is a lens, it meets the requirements of applications with limited longitudinal space, just like a condenser.

[0033] Multiple components such as condensers, reflectors, and lenses can be combined and configured according to actual needs.

[0034] The primary optical unit 2 and the first imaging unit 3 are integrally formed.

[0035] The primary optical unit 2 and the first imaging unit 3 can be integrally injection molded to reduce installation steps and size chain.

[0036] The second imaging unit 4 is a reflector or lens.

[0037] When the second imaging unit 4 is a lens, the first imaging unit 3 and the second imaging unit 4 are aligned with the light emission direction. When the second imaging unit 4 is a mirror, the arrangement of the first imaging unit 3 and the second imaging unit 4 can be at a certain angle to the light emission direction to adapt to application scenarios where the size of the light emission direction is limited.

[0038] When applied to the low beam function, a cutoff line baffle 5 is provided between the primary optical unit 2 and the first imaging unit 3. The cutoff line baffle 5 can be integrated with the primary optical unit 2 and the first imaging unit 3 as a whole, such as... Figure 1-2 As shown. The cutoff line baffle 5 has a total internal reflection function. A portion of the light rays passing through the primary optical unit 2 are directly emitted through the first imaging unit 3, and the other portion is reflected by the cutoff line baffle 5 and then emitted through the first imaging unit 3.

[0039] The primary optical unit 2 and the first imaging unit 3 can also be separate units. When the first imaging unit 3 is a separate unit, the first imaging unit 3 includes an incident surface and an exit surface. The incident surface and the exit surface together constitute a semi-collimation function, and the reverse extension line after refraction in another direction converges on the virtual focal line 6.

[0040] The second imaging unit 4 is provided with a diffusion pattern. The first imaging unit 3 can also be provided with a diffusion pattern. The diffusion pattern of the first imaging unit 3 is consistent with its collimation direction. That is to say, when the first imaging unit 3 collimates the light in the horizontal direction, the diffusion direction of its diffusion pattern is also in the horizontal direction.

[0041] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A headlight optical system with a small opening size, characterized in that, include: Light source (1); Primary optical unit (2), the primary optical unit (2) is located in the light emission direction of the light source (1), the primary optical unit (2) is used to perform preliminary shaping of the light emitted by the light source (1); An imaging system, comprising a first imaging unit (3) and a second imaging unit (4). The first imaging unit (3) is located in the light-emitting direction of the primary optical unit (2). The first imaging unit (3) has a virtual focal line (6). The light distribution of the initially shaped light on the focal plane of the imaging system is collimated by the first imaging unit (3) in one direction. In another direction, after being refracted by the first imaging unit (3), the backward extensions of the light converge at the virtual focal line (6). The second imaging unit (4) is a unit with a real focal line, and the real focal line of the second imaging unit (4) intersects the imaginary focal line (6) at least at one point.

2. The headlight optical system with a small opening size according to claim 1, characterized in that, The real focal line of the second imaging unit (4) is a straight line or a curve.

3. The headlight optical system with a small opening size according to claim 2, characterized in that, The number of the imaging system and the primary optical unit (2) are the same and correspond one-to-one, or the number of primary optical units (2) is multiple, and multiple primary optical units (2) correspond to one imaging system.

4. The headlight optical system with a small opening size according to claim 1, characterized in that, The primary optical unit (2) is one or more of a condenser, a reflector, and a lens.

5. The headlight optical system with a small opening size according to claim 1, characterized in that, The primary optical unit (2) and the first imaging unit (3) are integrally formed.

6. The headlight optical system with a small opening size according to claim 1, characterized in that, The second imaging unit (4) is a mirror or a lens.

7. The headlight optical system with a small opening size according to claim 1, characterized in that, A cutoff line baffle (5) is provided between the primary optical unit (2) and the first imaging unit (3).

8. The headlight optical system with a small opening size according to claim 1, characterized in that, The first imaging unit (3) and / or the second imaging unit (4) are provided with diffusion patterns.

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