Reflective headlamp optical system

Abstract

The utility model discloses a reflective headlamp optical system, which comprises a light source, a primary optical unit, a first imaging part and a second imaging part, the primary optical unit is located in the light emitting direction of the light source and used for adjusting the emitting angle of light emitted by the light source. The first imaging part is located in the light emitting direction of the primary optical unit, and the first imaging part is used for reflecting the light rays adjusted by the primary optical unit; the second imaging part is located in the light emitting direction of the first imaging part, and the second imaging part is used for reflecting and emitting light passing through the first imaging part; the first imaging part is provided with a first focal line in the first direction, the second imaging part is provided with a second focal line in the second direction, the first focal line and the second focal line form a focus area of the whole optical system, and the optical system has the advantages of being even in lighting and avoiding dispersion.

Description

Technical Field

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

[0002] In the current field of optical system design, lens solutions used for both headlights and signal lights suffer from chromatic aberration, a phenomenon that is difficult to eradicate. Existing technologies can only provide limited improvement, not complete elimination. This chromatic aberration problem produces colored stripes or spots within the illuminated area, severely interfering with the human eye's accurate recognition of the true colors of objects. This not only significantly reduces lighting quality and visual comfort but also causes light energy to be dispersed across different spatial locations and spectral frequencies. Because light energy cannot be effectively focused on the target illuminated area, the brightness distribution is uneven, creating a visual effect of alternating light and dark areas. This greatly affects the driver's clear observation of road conditions, posing a potential safety hazard. To address this problem, a reflective headlight optical system 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 reflective headlight optical system, which has the advantages of uniform illumination and avoidance of color dispersion.

[0005] According to an embodiment of the present invention, a reflective front light optical system includes: a light source, a primary optical unit, a first imaging unit, and a second imaging unit; the primary optical unit is located in the light emission direction of the light source and is used to adjust the emission angle of the light emitted by the light source; the first imaging unit is located in the light emission direction of the primary optical unit and is used to reflect the light regulated by the primary optical unit; the second imaging unit is located in the light emission direction of the first imaging unit and is used to reflect the light emitted by the first imaging unit; the first imaging unit has a first focal line in a first direction, and the second imaging unit has a second focal line in a second direction, the first focal line and the second focal line forming the focal region of the entire optical system; the primary optical unit is used to form the desired light distribution of the light emitted by the light source in the focal region; the first imaging unit is used to collimate the light rays in the horizontal direction in the focal region; and the second imaging unit is used to collimate the light rays in the vertical direction in the focal region.

[0006] According to one embodiment of the present invention, the first imaging part has a first contour line on the plane in the first direction, the first contour line has a first focal point, and the first contour line extends along the normal of the plane to form the first imaging part.

[0007] According to one embodiment of the present invention, the second imaging part has a second contour line on the plane where the second direction is located, the second contour line has a second focal point, the second contour line extends along the normal of the plane where it is located to form the second imaging part, and the second focal line is located in the negative direction of the light output axis of the first imaging part.

[0008] According to one embodiment of the present invention, the focal length of the second contour line is greater than the focal length of the first contour line.

[0009] According to one embodiment of the present invention, a diffusion pattern is formed on the surface of the first imaging part.

[0010] According to one embodiment of the present invention, the second imaging unit is provided with a diffusion pattern in the light emission direction.

[0011] According to one embodiment of the present invention, the surface of the primary optical unit is formed with a diffusion pattern.

[0012] According to one embodiment of the present invention, the primary optical unit is a lens, a mirror, or a condenser.

[0013] According to one embodiment of the present invention, the first imaging unit is a reflective mirror or a reflective unit composed of multiple optical elements.

[0014] According to one embodiment of the present invention, the second imaging unit is a refractive unit and / or a reflective unit.

[0015] The beneficial effect of this utility model is that it uses a first imaging unit and a second imaging unit to project and image light in the horizontal and vertical directions respectively, which improves the uniformity of light distribution and avoids dispersion caused by refraction of different wavelengths, thus achieving a neutral light and dark cutoff line color.

[0016] 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.

[0017] 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

[0018] 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:

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2This is a schematic diagram of the light path in the horizontal plane according to this utility model;

[0021] Figure 3 This is a schematic diagram showing the positions of the first and second focal points of this utility model;

[0022] Figure label:

[0023] 1. Light source; 2. Primary optical unit; 3. First imaging unit; 4. Second imaging unit. Detailed Implementation

[0024] 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.

[0025] 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.

[0026] 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.

[0027] The reflective headlight optical system of this utility model embodiment is described in detail below with reference to the accompanying drawings.

[0028] like Figures 1-3As shown, the reflective front light optical system according to an embodiment of the present invention includes: a light source 1, a primary optical unit 2, a first imaging unit 3, and a second imaging unit 4; the primary optical unit 2 is located in the light-emitting direction of the light source 1, and is used to adjust the emission angle of the light emitted by the light source 1; the first imaging unit 3 is located in the light-emitting direction of the primary optical unit 2, and is used to reflect the light regulated by the primary optical unit 2; the second imaging unit 4 is located in the light-emitting direction of the first imaging unit 3, and is used to reflect the light emitted by the first imaging unit 3; the first imaging unit 3 has a first focal line in a first direction, and the second imaging unit 4 has a second focal line in a second direction, the first focal line and the second focal line forming the focal region of the entire optical system; the primary optical unit 2 is used to form the desired light distribution of the light emitted by the light source 1 at the focal region; the first imaging unit 3 is used to collimate the light in the horizontal direction at the focal region; and the second imaging unit 4 is used to collimate the light in the vertical direction at the focal region.

[0029] In this embodiment, the light emitted by the light source 1 passes through the primary optical unit 2. The primary optical unit 2 adjusts the angle of the light according to the needs to form the required light distribution at the focal area, so as to form a light area that is farther or closer on the road surface as needed. The light is reflected by the first imaging unit 3 to the second imaging unit 4 and the horizontal light is collimated. The light is reflected by the second imaging unit 4 to the light outlet and the vertical light is collimated. That is to say, the first imaging unit 3 projects the horizontal light and the second imaging unit 4 projects the vertical light, thereby achieving uniformity of the emitted light distribution. In this process, the first imaging unit 3 and the second imaging unit 4 only achieve light imaging in one direction. Therefore, since the imaging of the reflector is different from that of the lens, there is no dispersion caused by the refraction of different wavelengths, thus presenting a neutral light cutoff line color.

[0030] The first imaging unit 3 has a first contour line on the plane of the first direction, the first contour line has a first focal point, the first contour line extends along the normal direction of the plane to form the first imaging unit 3, and a plurality of first focal points along the normal direction of the plane to form the first focal line of the first imaging unit 3.

[0031] The second imaging unit 4 has a second contour line on the plane where the second direction is located. The second contour line has a second focal point. The second contour line extends along the normal direction of the plane where it is located to form the second imaging unit 4. Multiple second focal points along the normal direction of the plane where the second focal line of the second contour line is located form a second focal line. The first focal line is located in the negative direction of the optical axis of the first imaging unit 3.

[0032] In this embodiment, both the first contour line and the second contour line are parabolas. The extension direction of the first contour line can be vertical or other directions. The guide line extending the first contour line can be a straight line or a curve, etc. Specifically, it can be adjusted according to the arrangement of the light source 1, the primary optical unit 2, the first imaging unit 3 and the second imaging unit 4, as long as the plane of the first contour line is perpendicular to the extension direction. The same applies to the second contour line.

[0033] The focal length of the second contour line is greater than that of the first contour line.

[0034] In this embodiment, for the high and low beam functions, the first contour line is located on a horizontal plane, and the second contour line is located in a vertical plane parallel to the light emission direction of the first imaging unit 3, such as... Figure 3 As shown, the first focal point is F1 with a focal length of f1, and the second focal point is F2 with a focal length of f2. F2 is located in the negative direction of the optical axis of the first imaging unit 3 and is twice the distance of F1. Since f2 > f1, the vertical angle is smaller than the horizontal angle, which is suitable for near and far beam functions.

[0035] The reflective headlight optical system includes multiple light sources 1, primary optical units 2, a first imaging unit 3, and a second imaging unit 4. Each set of light sources 1, primary optical units 2, first imaging unit 3, and second imaging unit 4 is arranged along the shape direction of the reflective headlight optical system. Due to the working principle of the second imaging unit 4, the width area covered by the light source 1 is wider than that of the traditional scheme. Therefore, when multiple light sources 1 are arranged along the width direction, the superposition of light patterns of multiple light sources 1 is reduced, forming a uniform road surface effect.

[0036] A diffusion pattern is formed on the surface of the first imaging unit 3.

[0037] The second imaging unit 4 has a diffusion pattern in the light-emitting direction.

[0038] For low beam assist or corner fog lights, a wide horizontal projection angle and uniform lighting effect are achieved by forming a diffusion pattern on the surface of the first imaging unit 3 or in the light-emitting direction of the second imaging unit 4. The diffusion pattern is a unidirectional diffusion pattern, such as a cylindrical surface.

[0039] For traffic lights, diffusion patterns are formed on the surfaces of the primary optical unit 2, the first imaging unit 3, and the second imaging unit 4 to enhance the lighting effect.

[0040] The primary optical unit 2 is a refractive and / or reflective unit, such as a lens, mirror, or condenser, to achieve the desired light distribution at the focal region of the light emitted by the light source 1. For example, when the primary optical unit 2 is a condenser, the light emission center of the light source 1 is located at the focal point of the condenser, and the light passing through the condenser can be parallel in at least one direction or the light rays can be deflected at a certain angle. In addition, patterns can be attached to the surface of the primary optical unit 2 to form a wider light distribution, thereby achieving a wider horizontal road illumination projection angle, while also improving the light spot on the mask, and achieving a continuous and uniform light distribution.

[0041] The first imaging unit 3 is a reflective unit composed of a reflector or multiple optical elements.

[0042] The second imaging unit 4 is a reflective unit composed of a reflector or multiple optical elements.

[0043] In other words, the first imaging unit 3 and the second imaging unit 4 can be equipped with reflective material coated on the optical surface to achieve the function of reflection, or different optical components can be integrated into one piece and the function of reflection can be achieved by internal total internal reflection or external coating of reflective film.

[0044] 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.

[0045] 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 reflective headlamp optical system characterized by, The utility model relates to a light source (1); A primary optical unit (2) is arranged in the light emitting direction of the light source (1), and the primary optical unit (2) is used for adjusting the exit angle of the light emitted by the light source (1); A first imaging part (3) is arranged in the light emitting direction of the primary optical unit (2), and the first imaging part (3) is used for reflecting the light adjusted by the primary optical unit (2); A second imaging part (4) is arranged in the light emitting direction of the first imaging part (3), and the second imaging part (4) is used for reflecting the light emitted by the first imaging part (3); The first imaging part (3) has a first focal line in a first direction, the second imaging part (4) has a second focal line in a second direction, the first focal line and the second focal line form a focal point area of the whole optical system, the primary optical unit (2) is used for forming a required light distribution of the light emitted by the light source (1) at the focal point area, the first imaging part (3) is used for collimating the light in the horizontal direction on the focal point area, and the second imaging part (4) is used for collimating the light in the vertical direction on the focal point area. The first imaging part (3) has a first contour line in the plane of the first direction, the first contour line has a first focal point, and the first contour line extends along the normal of the plane to form the first imaging part (3).

2. The reflective headlamp optical system of claim 1, wherein The second imaging part (4) has a second contour line in the plane of the second direction, the second contour line has a second focal point, and the second contour line extends along the normal of the plane to form the second imaging part (4), and the second focal line is arranged in the negative direction of the light emitting axis of the first imaging part (3).

3. The reflective headlamp optical system of claim 2, wherein The focal length of the second contour line is greater than the focal length of the first contour line.

4. The reflective headlamp optical system of claim 3, wherein The surface of the first imaging part (3) is formed with a diffusion pattern.

5. The reflective headlamp optical system of claim 1, wherein The surface of the second imaging part (4) is formed with a diffusion pattern.

6. The reflective headlamp optical system of claim 1, wherein The surface of the primary optical unit (2) is formed with a diffusion pattern.

7. The reflective headlamp optical system of claim 1, wherein The primary optical unit (2) is a refractive unit and / or a reflective unit.

8. The reflective headlamp optical system of claim 1, wherein The first imaging part (3) is a mirror or a reflective unit composed of multiple optical elements.

9. The reflective headlamp optical system of claim 1, wherein The second imaging part (4) is a mirror or a reflective unit composed of multiple optical elements.

10. The reflective headlamp optical system of claim 1, wherein ​

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