Optical system with multiple light sources equivalent to same virtual focus

Abstract

The utility model relates to the technical field of automobile lighting, in particular to a multi-light-source equivalent same virtual focus optical system, which comprises a light guide body and a plurality of reflecting surfaces, the plurality of reflecting surfaces are arranged on the light guide body, the section line of each reflecting surface in an XY plane at least comprises a section of hyperbolic curve, each hyperbolic curve has a focus f1 and a focus f2, focuses f1 of the hyperbolic curves coincide to form the same focus; and the light-emitting surface is a convex lens curved surface, and the focus of the light-emitting surface is f1. By arranging the hyperbolic curve surfaces with the common focal point f1 and the light emitting surface with the focal point f1 as the focal point, the multiple light sources are equivalent to the light source emitted from the same virtual focal point f1, so that the arrangement and segmentation mode of the light sources and the optical surfaces is changed, the fall among the multiple light sources is reduced, the fall among the optical surfaces is greatly reduced, and the light emitting efficiency is improved. Therefore, the lighting uniformity of the lamp is improved.

Description

Technical Field

[0001] This application relates to the field of automotive lighting technology, and more particularly to a multi-source equivalent virtual focal point optical system. Background Technology

[0002] As the automotive industry has developed, car headlight designs have become increasingly unique and innovative, resulting in sharper and more aggressive shapes. The large angles and sharp turns of these headlights have posed significant challenges to traditional optical solutions. One of the most common challenges is that the extremely steep angles of corner lights lead to a growing distance difference between light sources in the optical system. This large difference creates significant surface differences between optical surfaces, which greatly reduces the uniformity of the light after illumination.

[0003] Existing methods for optimizing uniformity degradation caused by uneven surfaces mostly involve adding or removing stripes and textures or other optical surface treatments to the uneven surface, or reducing bright spots caused by the uneven surface, or brightening dark areas caused by the uneven surface. However, such treatments have limited effectiveness in optimizing shapes with extremely steep slopes. Utility Model Content

[0004] The technical problem to be solved by this invention is that in a multi-source optical system, the difference in height between the light sources is large, resulting in uneven light output.

[0005] Therefore, this utility model provides an optical system with multiple light sources equivalent to the same virtual focal point.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A multi-source equivalent virtual focal point optical system, comprising,

[0008] Light guide,

[0009] Multiple reflective surfaces are disposed on the light guide. The cross-sectional line of each reflective surface in the XY plane contains at least a hyperbola. Each hyperbola has a focal point f1 and a focal point f2. The focal points f1 of each hyperbola coincide to form the same focal point.

[0010] The light-emitting surface is a convex lens surface with focal point f1 as its focus.

[0011] Furthermore, a drop surface is provided between adjacent reflective surfaces, and the plane containing each drop surface passes through the focal point f1.

[0012] Furthermore, the reflective surface is provided with patterns.

[0013] Furthermore, the light-emitting surface is provided with patterns.

[0014] Further, the reflecting surface and the light emitting surface are provided with patterns.

[0015] Further, the light guide body is provided with a plurality of semispherical grooves, the semispherical grooves are arranged on the side wall between the reflecting surface and the light emitting surface, the cross section of the semispherical grooves in the XY plane is circular, and the center of the circle is the focal point f2.

[0016] The utility model discloses the beneficial effect is, the application is through setting up the hyperbolic surface with common focal point f1, and the light emitting surface with focal point f1 as the focal point, makes multiple light sources equivalent into the light source that emits from the same virtual focal point f1, thereby changes the arrangement segmentation mode of light source and optical surface, reduces the difference between multiple light sources, greatly reduces the difference surface between optical surfaces, thereby improves the uniformity of lamp lighting. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model is further explained below in combination with the drawings and examples.

[0018] Figure 1 It is the structure schematic diagram of the optical system of multiple light sources equivalent same virtual focal point in the XY plane in the utility model.

[0019] Figure 2 It is the optical path diagram of the optical system of multiple light sources equivalent same virtual focal point in the XY plane in the utility model.

[0020] Figure 3 It is the structure schematic diagram of the hyperbolic surface in the utility model.

[0021] Figure 4 It is the structure schematic diagram of the semispherical groove on the light guide body in the utility model.

[0022] In the drawing: 1, light guide body, 2, reflecting surface, 3, light emitting surface, 4, difference surface, 5, semispherical groove. DETAILED DESCRIPTION

[0023] Now the utility model is further explained in detail in combination with the drawings. These drawings are all simplified schematic diagrams, just with the schematic mode to explain the basic structure of the utility model, so it just shows the constitution related with the utility model.

[0024] In the description of the utility model, it is necessary to understand that the orientation or positional relation indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is the orientation or positional relation based on the orientation or positional relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. In addition, the features limited by "first" and "second" can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0025] In the description of the utility model, it should be explained that, unless otherwise specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0026] A multi-light-source equivalent same virtual focal point optical system, comprising a light guide body 1, a plurality of reflecting surfaces 2 and an outlight surface 3 are arranged on the light guide body 1.

[0027] The focal point of the outlight surface 3 is f1, each reflecting surface 2 is arranged as a hyperbolic curved surface, and the projection of each reflecting surface 2 in the XY plane is a curve J, the curve J at least contains a hyperbola, in the embodiment, the curve J is a hyperbola, the hyperbola has focal points f1 and f2, and the reflecting surface 2 is a curved surface obtained by rotating the curve J around the line connecting f1 and f2, so that the plurality of reflecting surfaces 2 have a common focal point f1, and the plurality of curves J also have a common focal point f1.

[0028] The light emitted by the plurality of light sources at the plurality of focal points f2 is reflected by the reflecting surface 2, and the reverse extension line of the light intersects with another focal point f1, so that the light of each light source reflected by the hyperbolic curved surface can be equivalent to the light emitted from the same focal point f1. Since the outlight surface 3 is a convex lens curved surface protruding away from the reflecting surface 2, and the focal point of the convex lens is also f1, the light emitted by the light source is reflected by the hyperbolic curve and refracted by the outlight surface 3, and all the light is parallelly emitted.

[0029] It should be noted that the adjacent reflecting surfaces 2 are provided with the stepped surfaces 4, and the planes where the stepped surfaces 4 are located all pass through the focal point f1. Since the stepped surfaces 4 are not parallel to the light-out direction of the whole optical system, when the whole optical system is observed from the light-out surface 3, only a small stepped surface 4 or even no stepped surface 4 can be seen at each angle, so the influence of the stepped surfaces 4 on the uniformity of the lightening of the lamp will greatly reduce.

[0030] Since the focal point f2 is the position of the light source, adjusting the position of the focal point f2 will change the position of the light source, and by adjusting the position of the light source, the distance difference between each light source can be reduced, and the stepped surfaces 4 between the reflecting surfaces 2 can be further reduced, thereby optimizing the uniformity after lightening.

[0031] Further, the reflecting surfaces 2 and the light-out surface 3 can be provided with random patterns, thereby increasing the aesthetic appearance of the optical system.

[0032] In other embodiments, the light guide body 1 (the Z-axis direction is the thickness direction of the light guide body 1) can also be provided with a plurality of semispherical grooves 5 with the focal point f2 as the center, and the cross section of the semispherical groove 5 in the XY plane is circular. The light source is arranged at the center of the semispherical groove 5, and the light emitted by the light source will propagate along the original direction through the semispherical groove.

[0033] Based on the above ideal embodiments according to the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the contents in the specification, and must be determined by the scope of the claims.

Claims

1. A multi-light-source equivalent identical virtual focus optical system, characterized by, The utility model relates to a light guide body (1), and A plurality of reflection surfaces (2) are arranged on the light guide body (1), each of the reflection surfaces (2) comprises at least one hyperbola in the XY plane, each of the hyperbolas has a focus f1 and a focus f2, and the focus f1 of each of the hyperbolas coincides with the same focus; An outlight surface (3) is arranged on the light guide body (1), the outlight surface (3) is a convex lens surface, and the outlight surface (3) has the focus f1 as a focal point. A plurality of drop surfaces (4) are arranged between adjacent reflection surfaces (2), and each of the drop surfaces (4) passes through the focus f1.

2. The multi-source equivalent single virtual focal point optical system according to claim 1, wherein The reflection surface (2) is provided with a pattern.

3. The multi-source equivalent single virtual focal point optical system according to claim 1, wherein The outlight surface (3) is provided with a pattern.

4. The multi-source equivalent single virtual focal point optical system of claim 1, wherein, The reflection surface (2) and the outlight surface (3) are provided with a pattern.

5. The multi-source equivalent single virtual focal point optical system of claim 1, wherein, A plurality of semispherical grooves (5) are arranged on the light guide body (1), the semispherical grooves (5) are arranged on the side wall between the reflection surface (2) and the outlight surface (3), the cross section of the semispherical groove (5) in the XY plane is a circle, and the center of the circle is the focus f2.

6. The multi-source equivalent single virtual focal point optical system of claim 1, wherein, ​

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