Uniform lighting optical system and vehicle lamp

Abstract

The optical system comprises an imaging unit, at least part of the contour line of the imaging unit is a parabola, and a focal point F of the parabola forms a focal line a in the normal direction; the light source corresponds to the imaging unit, and the center of the light source is arranged along the focal line a; the mirror surface is perpendicular to the focal line a and is at least arranged on one side of the light source; one part of light emitted by the light source is directly emitted after being reflected by the imaging unit, one part of the light is reflected to the mirror surface through the imaging unit and then emitted after being reflected by the mirror surface, and one part of the light is directly emitted to the mirror surface and then emitted after being reflected. According to the optical system capable of lighting uniformly and the vehicle lamp, the brightness of corners / edges can be improved, and the effect of lighting uniformly is achieved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle lighting technology, specifically to an optical system, and more particularly to an optical system and vehicle lighting with uniform illumination. Background Technology

[0002] The uniformity of the illumination of signal lights and headlights is an important subjective evaluation aspect of vehicle lights, and it is also one of the more difficult problems to solve at present.

[0003] A common method to improve uniformity is to create diffusion patterns on the surface of the light source receiver or on other optical elements in the light emission direction. However, this method has the problem of low optical efficiency. Many rays, after initial diffusion, exit at a large angle and fail to reach the next stage of optical elements, resulting in inefficient light utilization and low efficiency. Additionally, due to less light at the edges, the brightness of corners / edges is lower than other areas. Utility Model Content

[0004] The technical problem to be solved by this utility model is: in order to solve the problem of uneven lighting effect in the prior art, this utility model provides an optical system and vehicle light with uniform lighting, which can improve the brightness of corners / edges and achieve a uniform lighting effect.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a uniformly illuminated optical system, comprising: an imaging unit, the outline of which is at least partially a parabola, the focal point F of which forms a focal line a along the normal; a light source corresponding to the imaging unit, the center of which is arranged along the focal line a; a mirror perpendicular to the focal line a, which is at least disposed on one side of the light source; part of the light emitted from the light source is reflected by the imaging unit and then emitted directly, part of which is reflected by the imaging unit to the mirror and then emitted again after reflection by the mirror, and part of which is reflected after being directly incident on the mirror.

[0006] This invention provides a uniformly illuminated optical system where the light rays on the sides are not only emitted from the actual light source itself, but also, due to the mirror effect, can be considered as emanating from a mirrored light source, thus increasing the number of light rays on the sides / corners and improving the illumination effect.

[0007] Furthermore, the imaging unit is a reflector, and the contour line in the vertical plane of the reflector at least partially includes a parabola, thereby enabling the reflector to image the light distribution on the focal plane.

[0008] Furthermore, the imaging unit is a lens, and the contour lines in the vertical plane of the lens collimate the light rays in the vertical plane, thereby enabling the lens to image the light distribution on the focal plane.

[0009] Furthermore, in order to ensure that the illumination brightness is consistent at all points of observation, a mirror is provided on the left and / or right side of the light source.

[0010] Furthermore, in order to adjust according to the actual lighting effect, the mirror is located at the center between the two light sources, or the mirror is located off-center from the center between the two light sources.

[0011] Furthermore, in order to obtain different lighting effects, the light-emitting center of the light source is located on the focal line, or the light-emitting center of the light source is spaced apart from the focal line.

[0012] Furthermore, in order to adapt to the requirements of different lamps, each of the imaging units is provided with a multi-core light source or multiple single-core light sources.

[0013] Furthermore, the imaging units are arranged in a stepped manner, and the focal lengths of the imaging units are the same or different from each other.

[0014] Furthermore, in order to further expand the illuminated area, the imaging unit is provided with a light diffusion pattern in the light emission direction.

[0015] The technical solution adopted by this utility model to solve its technical problem is: a vehicle lamp, including the above-mentioned optical system with uniform illumination.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This invention provides a uniformly illuminated optical system. By setting a mirror on the side of the light source, the side light can be regarded as being emitted by a mirrored light source. In the horizontal direction, this increases the number of side light rays, thereby improving the uniform illumination effect and avoiding low brightness at the edges / corners. 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 structure of the optical system of this utility model that provides uniform illumination;

[0020] Figure 2 A schematic diagram of the light rays in a horizontal plane for illuminating a uniform optical system;

[0021] Figure 3 A schematic diagram of the light rays in a vertical plane for illuminating a uniform optical system;

[0022] Figure 4 A schematic diagram of the structure of Embodiment 3 for a uniformly illuminated optical system;

[0023] Figure 5 A schematic diagram of the structure of Example 4, which provides a uniformly illuminated optical system;

[0024] Figure 6 for Figure 5 A sectional view in the vertical plane;

[0025] Figure 7 for Figure 5 Another sectional view within the vertical plane;

[0026] Figure 8 for Figure 4 A schematic diagram of the structure within the horizontal plane;

[0027] In the diagram: 1. Light source, 2. Imaging unit, 3. Mirror, 4. Light diffusion pattern, a. Focal line, F. Focal point. Detailed Implementation

[0028] 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.

[0029] 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.

[0030] 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.

[0031] Example 1, as Figure 1 As shown, an optical system with uniform illumination includes: an imaging unit 2, a light source 1, and a mirror 3.

[0032] The contour of imaging unit 2 includes a parabola. When imaging unit 2 is a reflecting unit, the contour contains a parabola. In this embodiment, imaging unit 2 is a reflecting mirror. The contour of the reflecting mirror in a plane parallel to the vertical plane is at least partially a parabola. Thus, the focal point F of the parabola forms a focal line a along the normal. Specifically, imaging unit 2 mainly images the light distribution out of the focal plane in a vertical plane; typically, the contour of the reflecting mirror is located in a vertical plane, but sometimes, due to design or other reasons, it may not be in a vertical plane, in which case the focal line a will be tilted at a certain angle.

[0033] The centers of light sources 1 are arranged along the focal line a, and the light emission center of light source 1 is located on the focal line a, or the light emission center of light source 1 is offset from the focal line a by a certain distance.

[0034] A mirror 3, perpendicular to the focal line a, is positioned at least on one side of the light source 1. A portion of the light emitted from the light source 1 is reflected by the imaging unit 2 and emitted directly; another portion is reflected by the imaging unit 2 to the mirror 3, then reflected again by the mirror 3, and finally emitted; and a third portion is reflected directly from the mirror. Preferably, when the optical axis of the imaging unit 2 is parallel to the direction of travel, mirrors 3 can be placed on both sides of all light sources 1 to ensure consistent brightness at the same observation angle; when the optical axis of the imaging unit 2 is deflected to the left or right in the horizontal plane, mirrors 3 can be placed on one side of all light sources 1. When the mirror 3 is not perpendicular to the focal line a, the backward extension of the light emitted from the actual light source 1 after passing through the mirror 3 does not pass through the virtual image light source 1, resulting in defocusing; defocusing leads to stray light and uneven illumination.

[0035] The light principle diagram of the optical system is as follows: Figure 2 and Figure 3 As shown, when the contour line extends along the normal to form imaging unit 2, imaging unit 2 has a focal line a. In the horizontal plane, light emitted from any point on focal line a passes through imaging unit 2, and the backward extensions of the reflected light converge at a point located on the directrix I of the parabola. With mirrors 3 arranged on one side of all light sources 1, when light emitted from light source 1 passes through imaging unit 2 and is reflected by mirror 3, its backward extensions converge at virtual image light source 1'. Light source 1 and virtual image light source 1' are symmetrical along mirror 3. This means that in addition to the actual light sources 1, there are also light rays emitted from the mirrored light sources. Therefore, at the same viewing angle, the light rays on the side are emitted not only by the actual light source 1 itself but also by the mirrored light source 1, improving the lighting effect. In addition, in the horizontal direction, this is equivalent to the light rays emitted by light source 1. In this case, each LED is responsible for the widest width, that is, only emitted by the light source.

[0036] Example 2 differs from Example 1 in that the imaging unit 2 is a lens. The lens can collimate light rays by using the contour lines parallel to the vertical plane. Thus, the lens has the function of imaging the light distribution on the focal plane. The imaging principle of the lens is similar to that of a reflecting mirror, and will not be described in detail here.

[0037] Example 3, as Figure 4 As shown, based on Embodiment 1, mirrors 3 are provided on both the left and right sides of the light source 1. The mirrors 3 are located at the center between the two light sources 1, or they are located off-center from the center between the two light sources 1. The specific position of the mirrors 3 can be adjusted according to the actual lighting effect.

[0038] Example 4, as Figures 5 to 8 As shown, based on Embodiment 1, the imaging units 2 are arranged in a stepped manner, and the focal lengths of the imaging units 2 are the same or different from each other. Each imaging unit 2 is equipped with one multi-core light source or multiple single-core light sources. The light-emitting direction of the imaging unit 2 is provided with a light diffusion pattern 4. When the focal line a is a curve, each mirror surface 3 is still a normal surface passing through a point on the focal line a.

[0039] Preferably, multiple single-core light sources correspond to one imaging unit 2, or one multi-core light source corresponds one-to-one with one imaging unit 2. When there are multiple imaging units 2, the imaging units 2 can be arranged flexibly, and can be tilted or arranged in other ways; at this time, the focal length of each imaging unit 2 can be the same or different; it is only necessary to ensure that the light source 1 is located on the focal line in each imaging unit system.

[0040] The technical solution adopted by this utility model to solve its technical problem is: a vehicle lamp, including the above-mentioned optical system with uniform illumination.

[0041] In summary, the optical system and vehicle headlights of this invention, which provide uniform illumination, can improve the brightness of corners / edges and achieve a uniform illumination effect.

[0042] 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 for illuminating uniformly, characterized by, The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly.

2. The optical system of claim 1, wherein The application relates to an optical system for illuminating uniformly.

3. The uniform-illuminance optical system according to claim 1, wherein The application relates to an optical system for illuminating uniformly.

4. The uniform-illuminance optical system according to claim 1, characterized by, The application relates to an optical system for illuminating uniformly.

5. The uniformly illuminated optical system of claim 4, wherein, The application relates to an optical system for illuminating uniformly.

6. The uniform-illuminance optical system according to claim 1, wherein The application relates to an optical system for illuminating uniformly.

7. The uniformly illuminated optical system of claim 6, wherein The application relates to an optical system for illuminating uniformly.

8. An optical system for illuminating a uniform light according to any one of claims 1 to 7, characterized in that, The application relates to an optical system for illuminating uniformly.

9. The uniformly illuminated optical system of claim 8, wherein, The application relates to an optical system for illuminating uniformly.

10. A vehicle lamp characterized by The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for illuminating uniformly. The application relates to an optical system for

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