Optical system with cut-off line and horizontal large-angle projection

Abstract

The utility model discloses an optical system with cut-off line and horizontal large angle projection, include: light source, be located the first reflection unit on the light source light direction, first reflection unit includes a plurality of reflection mirror that arrange in proper order, be located the second reflection unit on the first reflection unit light direction, the outline of second reflection unit is at least partly parabola, and the light distribution is imaged in vertical direction, the utility model discloses an optical system with cut-off line and horizontal large angle projection, and the clear bright-dark cut-off line is formed through the imaging function of second reflection unit, and guarantee horizontal light distribution width, and the even lighting is uniform.

Description

Technical Field

[0001] This utility model relates to the field of optical technology, specifically to vehicle lights, and more particularly to an optical system for a cutoff line between light and dark and a large-angle horizontal projection. Background Technology

[0002] With the rapid development of technology today, automotive lighting technology is also constantly improving.

[0003] Existing reflective optical solutions for achieving cutoff lines and wide-angle horizontal projection typically use a mirror to directly image the LED, with the mirror's focal point located at the edge of the LED's light emission to form the cutoff line. The drawback of this approach is that achieving a wide horizontal light distribution requires diffusion through the mirror itself, but this diffusion can affect the clarity of the cutoff line to some extent.

[0004] In addition, more and more customers are now demanding that the headlights illuminate as evenly as traffic lights. Even with the addition of diffusion patterns in the direction of the light emitted from the reflector, it is difficult to achieve the above effect and stray light is very easy to be generated. Utility Model Content

[0005] The technical problem to be solved by this utility model is: in order to solve the technical problem that the existing technology cannot simultaneously achieve a clear cutoff line and a wide horizontal light distribution, this utility model provides an optical system with a cutoff line and a wide horizontal projection angle. The imaging function of the second reflection unit forms a clear cutoff line with both light and dark areas, while ensuring a wide horizontal light distribution and uniform illumination.

[0006] The technical solution adopted by this utility model to solve its technical problem is: an optical system with a cutoff line and a large horizontal projection angle, comprising: a light source; a first reflecting unit located in the light emission direction of the light source, the first reflecting unit comprising a plurality of mirrors arranged in sequence; and a second reflecting unit located in the light emission direction of the first reflecting unit, the outline of the second reflecting unit being at least partially parabolic, and imaging the light distribution in the vertical direction.

[0007] This invention features an optical system with a cutoff line and a large horizontal projection angle. By imaging the light distribution near the focal point through a second reflection unit, it can achieve both large horizontal projection angle and the formation of a clear light and dark cutoff line shape.

[0008] Furthermore, in order to further ensure the formation of a distinct light-dark cutoff line, the parabola has a focal point F, which is located at the optical unit with the light-dark cutoff line.

[0009] Furthermore, the focal point F is located between the first reflecting unit and the second reflecting unit, or between the light source and the first reflecting unit, or at the bottom boundary of the first reflecting unit, or at the center of the light source or away from the light source.

[0010] Furthermore, in order to further ensure the formation of a clear cutoff line between light and dark, when the focal point F is located at the bottom boundary of the first reflective unit, the cutoff line is formed by the bottom boundary of the first reflective unit.

[0011] Furthermore, in order to achieve horizontal projection at a large angle and improve the uniformity of illumination, the surfaces of the first reflective unit and / or the second reflective unit have diffusion patterns.

[0012] Furthermore, in order to achieve total internal reflection, the first reflective unit and the second reflective unit are separate structures, and the surfaces of the first reflective unit and the second reflective unit are coated with a reflective film.

[0013] Furthermore, in order to achieve total reflection, the first reflection unit and the second reflection unit are integrally formed structures, and the interiors of the first reflection unit and the second reflection unit are totally reflected.

[0014] Furthermore, in order to achieve different lighting needs, the light source can be multiple light sources or a single multi-core LED light source.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model has an optical system with a cutoff line and a large horizontal projection angle. The second reflection unit accurately images the light distribution near the focal point to form a clear cutoff line shape, while also achieving a large horizontal projection angle and uniform illumination.

[0017] 2. The present invention has an optical system with a cutoff line and a large horizontal projection angle. By setting diffusion patterns in the first and second reflection units and coordinating with the light emission angle of the first reflection unit, the effective angle of each LED light source is expanded, thereby further improving the uniformity of illumination. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the optical system of the present invention, which has a cutoff line and a large horizontal projection angle.

[0020] Figure 2 This is a diagram showing the propagation of light rays in an optical system.

[0021] Figure 3A diagram showing the optical pattern of the optical system;

[0022] In the diagram: 1. Light source, 2. First reflection unit, 3. Second reflection unit, 4. Optical 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, such as Figure 1 As shown, an optical system with a cutoff line and a large horizontal projection angle includes: a light source 1, a first reflective unit 2 located in the light-emitting direction of the light source 1, and a second reflective unit 3 located in the light-emitting direction of the first reflective unit 2.

[0027] Specifically, multiple light sources 1 correspond to the first reflection unit 2.

[0028] Specifically, the first reflecting unit 2 includes a plurality of mirrors arranged sequentially along a horizontal direction. The mirrors are preferably freeform surfaces. In this embodiment, the mirrors are arranged sequentially along a horizontal trend; they can be arranged along a horizontal straight line or at staggered intervals.

[0029] Specifically, the outline of the second reflective unit 3 is at least partially parabolic, and it images the light distribution near the focal point in the vertical direction. The second reflective unit 3 is formed by extending the outline along the normal direction. The extending guide line can be a straight line or a curve. In the vertical direction, the outline of the second reflective unit 3 needs to image the light distribution at the focal point.

[0030] Preferably, the second reflecting unit 3 is located in a vertical plane parallel to the driving direction. The outline of the second reflecting unit 3 includes a parabolic portion, and the parabola has a focal point F. The position of the focal point is flexible. The focal point F may be located between the first reflecting unit 2 and the second reflecting unit 3, or between the light source 1 and the first reflecting unit 2, or at the bottom boundary of the first reflecting unit 2, or at the center of the light source 1 or away from the light source 1, or at a certain distance from the first reflecting unit 2 (the distance is not greater than twice the focal length of the first reflecting unit 2).

[0031] Specifically, the focal point F is located at the optical unit 4, which has a cutoff line between light and dark, and can form a clear cutoff line shape.

[0032] Preferably, when the focal point F is located at the bottom boundary of the first reflecting unit 2, a cutoff line is formed by the bottom boundary of the first reflecting unit 2.

[0033] Specifically, the surfaces of the first reflective unit 2 and / or the second reflective unit 3 have diffusion patterns. The diffusion pattern of the first reflective unit 2 can further increase the angle of the light emitted from the first reflective unit 2, thus improving the lighting effect. The diffusion pattern in the light-emitting direction of the second reflective unit 3 can also achieve horizontal large-angle projection and improve the uniformity of lighting. Figure 3 The image is a light pattern diagram for an example.

[0034] Specifically, the first reflective unit 2 and the second reflective unit 3 are separate structures, and the surfaces of the first reflective unit 2 and the second reflective unit 3 are coated with a reflective film.

[0035] Example 2 differs from Example 1 in that the first reflective unit 2 and the second reflective unit 3 are integrally formed structures, and the interiors of the first reflective unit 2 and the second reflective unit 3 are totally reflective.

[0036] Example 3 differs from Example 1 in that the first reflective unit 2 corresponds to multiple light sources 1 or a multi-core LED light source.

[0037] In summary, the optical system of this invention, which features a cutoff line and a large horizontal angle projection, images the light distribution near the focal point through the second reflection unit, achieving both a large horizontal angle projection and a relatively clear cutoff line shape.

[0038] 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. An optical system with a cutoff line and a large horizontal projection angle, characterized in that, include: Light source (1); The first reflecting unit (2) is located in the light-emitting direction of the light source (1), and the first reflecting unit (2) includes a plurality of mirrors arranged in sequence; The second reflective unit (3) is located in the light-emitting direction of the first reflective unit (2). The outline of the second reflective unit (3) is at least partially parabolic and it images the light distribution in the vertical direction.

2. The optical system with a cutoff line and large-angle horizontal projection according to claim 1, characterized in that, The parabola has a focal point F, which is located at the optical unit (4) with a cutoff line.

3. The optical system with a cutoff line and large-angle horizontal projection according to claim 2, characterized in that, The focal point F is located between the first reflection unit (2) and the second reflection unit (3), or between the light source (1) and the first reflection unit (2), or at the bottom boundary of the first reflection unit (2), or at the center of the light source (1) or away from the light source (1).

4. The optical system with a cutoff line and large-angle horizontal projection according to claim 3, characterized in that, When the focal point F is located at the bottom boundary of the first reflective unit (2), a cutoff line is formed by the bottom boundary of the first reflective unit (2).

5. The optical system with a cutoff line and large-angle horizontal projection according to claim 1, characterized in that, The surfaces of the first reflective unit (2) and / or the second reflective unit (3) have diffusion patterns.

6. The optical system with a cutoff line and large horizontal projection angle according to claim 5, characterized in that, The first reflective unit (2) and the second reflective unit (3) are separate structures, and the surfaces of the first reflective unit (2) and the second reflective unit (3) are coated with reflective films.

7. The optical system with a cutoff line and large-angle horizontal projection according to claim 1, characterized in that, The first reflective unit (2) and the second reflective unit (3) are integrally formed structures, and the interior of the first reflective unit (2) and the second reflective unit (3) are totally reflective.

8. The optical system with a cutoff line and large horizontal projection angle according to claim 1, characterized in that, The light source (1) can be multiple light sources or a single multi-core LED light source.

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