Optical system suitable for high-beam and low-beam functions

Abstract

The utility model discloses an optical system suitable for high and low beam functions, which comprises a primary optical unit, a reflection imaging unit and a refraction imaging unit, the reflection imaging unit and the primary optical unit are arranged along the vertical direction, and the reflection imaging unit is positioned in the light emitting forward direction of the primary optical unit. The refraction imaging unit and the reflection imaging unit are arranged in the driving direction, so that after light passes through the primary optical unit, part of the light directly reaches the reflection imaging unit, and part of the light reaches the total reflection face and then is reflected to the reflection imaging unit. Light passing through the primary optical unit forms required light distribution at the focal plane of the optical system, and the reflection imaging unit and the refraction imaging unit image the light distribution at the focal plane of the optical system. According to the utility model, the primary optical unit, the refraction imaging unit and the reflection imaging unit are combined, so that the size of the optical system in the driving direction can be effectively reduced; besides, the optical system can reduce the size chain to the maximum extent, so that the influence of tolerance on optics can be reduced, the stability of the optical system is improved, and the uniformity of projection to the road surface can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle lamps, in particular to an optical system suitable for high and low beam functions. Background Art

[0002] Currently, a Chinese utility model patent discloses a concentrator-type headlamp optical system, a lighting device, and a headlight, all of which adopt refractive imaging units. However, the use of all refractive molding units will result in a larger size in the driving direction, and the dimensional chain of the overall structure is relatively large. The tolerance of the overall structure has a greater impact on the optical performance.

[0003] In view of this, it is necessary to design an optical system suitable for high and low beam functions to solve the above problems. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art.

[0005] To this end, the utility model provides an optical system suitable for high and low beam functions, which can reduce the dimension chain and reduce the influence of tolerance on optical performance.

[0006] The present invention provides an optical system suitable for high and low beam functions, comprising a primary optical unit, a reflective imaging unit, and a refractive imaging unit. The reflective imaging unit and the primary optical unit are arranged in a vertical direction, and the imaging unit is located in the positive light output direction of the primary optical unit. The refractive imaging unit and the reflective imaging unit are arranged along the driving direction, so that the reflective imaging unit and the refractive imaging unit work together to image the light distribution on the focal plane of the optical system.

[0007] The beneficial effects of the present invention are as follows: the application adopts a combination of a primary optical unit, a refractive imaging unit and a reflective imaging unit, which can effectively reduce the size of the optical system in the driving direction; in addition, the optical system can reduce the influence of tolerance on optics by minimizing the size chain, thereby improving the stability of optical performance and improving the uniformity of road projection.

[0008] Preferably, the reflective imaging unit is formed by extending a contour line; the contour line includes a parabola, and the guide line is a straight line, a curve, or a combination of a straight line and a curve.

[0009] Further preferably, the guide line of the reflective imaging unit is located in a vertical plane parallel to the driving direction, and the guide line is at 45° to the driving direction.

[0010] Preferably, the guide line of the reflective imaging unit is a normal line of a plane where the contour line of the reflective imaging unit is located, and the focus of the contour line of the reflective imaging unit coincides with the focus of the optical system.

[0011] Further preferably, the focus of the contour line of the refractive imaging unit in the vertical plane is the focus of a parabola symmetrical to the guide line of the reflective imaging unit.

[0012] Preferably, the primary optical unit, the reflective imaging unit and the refractive imaging unit are adapted to be formed as an integral piece.

[0013] Further preferably, the primary optical unit, the reflective imaging unit and the refractive imaging unit are adapted to be formed as separate parts respectively.

[0014] Preferably, the contour line shape of the independent refractive imaging unit in the vertical plane is any one or more combinations of plano-convex, convex-planar, biconvex and biconcave.

[0015] Further preferably, a baffle is provided on a side away from the primary optical unit, and the baffle is formed in a light-dark cut-off line shape.

[0016] Preferably, the primary optical unit is a concentrator, which allows part of the light to directly reach the focal plane of the optical system, and part of the light to reach the total reflection surface and then be reflected to the focal plane of the optical system, thereby forming the required uniform light distribution at the focal plane.

[0017] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The objectives and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 A three-dimensional diagram of the optical system of the utility model suitable for high and low beam functions;

[0021] Figure 2 This is a light propagation diagram of the optical system suitable for high and low beam functions in the utility model in a vertical plane;

[0022] Figure 3 This is a principle diagram of the light refracting of the imaging unit in a vertical plane of the optical system suitable for high and low beam functions of the utility model.

[0023] Description of reference numerals:

[0024] 1. Primary optical unit;

[0025] 2. Reflective imaging unit;

[0026] 3. Refraction imaging unit;

[0027] 4. Baffle;

[0028] F. Focus of the optical system;

[0029] F', focus of the refractive imaging unit in the vertical plane. DETAILED DESCRIPTION

[0030] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams that illustrate the basic structure of the present invention only in a schematic manner, and therefore only show components relevant to the present invention. In the description of the present invention, it should be understood that, unless otherwise specified, "multiple" means two or more, "bottom" refers to the bottom of the structure shown in the drawings, and "top" refers to the top of the structure shown in the drawings.

[0031] See also Figures 1 to 3 A specific embodiment of the utility model is an optical system suitable for high and low beam functions, including a primary optical unit 1, a reflective imaging unit 2, and a refractive imaging unit 3. The reflective imaging unit 2 and the primary optical unit 1 are arranged in a vertical direction, and the reflective imaging unit 2 is located in the positive light output direction of the primary optical unit 1. The refractive imaging unit 3 and the reflective imaging unit 2 are arranged along the driving direction, so that after passing through the primary optical unit 1, part of the light directly reaches the reflective imaging unit 2, and part of it reaches the total reflection surface and then is reflected to the reflective imaging unit 2; the light passing through the primary optical unit 1 forms the required light distribution at the focal plane of the optical system, so that the reflective imaging unit 2 and the refractive imaging unit 3 work together to image the light distribution on the focal plane of the optical system.

[0032] It should be noted that the primary optical unit 1 is a concentrator. It directs some light directly to the focal plane of the optical system, and some light is reflected back to the focal plane after reaching the total reflection surface, thereby forming the desired uniform light distribution at the focal plane. In principle, the primary optical unit 1 is not limited to a concentrator and can also be other optical structures as long as it can achieve the above functions.

[0033] Specifically, the guide line of the reflective imaging unit 2 is located in a vertical plane parallel to the driving direction, and the guide line is at a 45° angle to the driving direction. The above angles between the guide line and the driving direction are preferred, but are not limited to the above angles.

[0034] More specifically, reflective imaging unit 2 is formed by extending a contour line, wherein the contour line comprises a parabola, and the guide line is a straight line, a curve, or a combination of a straight line and a curve. The guide line of reflective imaging unit 2 is the normal to the plane on which the contour line of reflective imaging unit 2 lies, and the focal point of the contour line of reflective imaging unit 2 coincides with the focal point F of the optical system. The contour line extends along the guide line to form reflective imaging unit 2.

[0035] The focus F′ of the contour line of the refractive imaging unit 3 in the vertical plane is the focus of a parabola symmetrical along the guide line of the reflective imaging unit 2 .

[0036] In this practical example, the primary optical unit 1, reflective imaging unit 2, and refractive imaging unit 3 are preferably formed as a single component. Reflective imaging unit 2 achieves its reflective function through total internal reflection. Furthermore, the integration of the primary optical unit 1, reflective imaging unit 2, and refractive imaging unit 3 reduces the overall dimensional chain of the optical system, thereby minimizing the risk of optical performance instability caused by assembly tolerances due to the large dimensional chain. Furthermore, the resulting optical system can project a uniform light pattern on the road surface.

[0037] Of course, the primary optical unit 1, the reflective imaging unit 2 and the refractive imaging unit 3 are suitable for being formed as independent components. The independent reflective imaging unit 2 is an optical unit with a certain reflectivity, which can be provided with a certain reflectivity by means of surface coating.

[0038] Specifically, the contour line shape of the independent refractive imaging unit 3 in the vertical plane is any one or more combinations of plano-convex, convex-planar, biconvex and biconcave.

[0039] Furthermore, when used for low beam applications, a baffle 4 is required, positioned away from the primary optical unit 1. This baffle 4 is shaped like a light / dark cutoff line. When incorporated into an integrated optical system, this baffle 4 can be integral with the primary optical unit 1, the reflective imaging unit 2, and the refractive imaging unit 3, and can be configured as a multi-segment surface for total internal reflection. When assembled with the individual primary optical units 1, 2, and 3 that comprise the optical system, this baffle 4 can be configured as a highlight plate with a specific refractive index.

[0040] Furthermore, when the baffle 4 is applied to an optical system integrating high and low beams, the primary optical units 1 may be provided on both sides of the baffle 4 .

[0041] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, 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 any one or more embodiments or examples.

[0042] The above description is based on the ideal embodiment of the present invention. Based on the above description, relevant personnel can make various changes and modifications without departing from the technical scope of this utility model. The technical scope of this utility model is not limited to the content of the specification, but must be determined by the scope of the claims.

Claims

1. An optical system suitable for high and low beam functions, characterized in that: The invention comprises a primary optical unit (1), a reflective imaging unit (2), and a refractive imaging unit (3); the reflective imaging unit (2) and the primary optical unit (1) are arranged in a vertical direction, and the reflective imaging unit (2) is located in the positive light-emitting direction of the primary optical unit (1); the refractive imaging unit (3) and the reflective imaging unit (2) are arranged in a driving direction, so that after the light passes through the primary optical unit (1), part of it directly reaches the reflective imaging unit (2), and part of it reaches the total reflection surface and then reflects to the reflective imaging unit (2); the light passing through the primary optical unit (1) forms a desired light distribution at the focal plane of the optical system, and the reflective imaging unit (2) and the refractive imaging unit (3) image the light distribution at the focal plane of the optical system.

2. The optical system suitable for high and low beam functions according to claim 1, characterized in that: The reflective imaging unit (2) is formed by extending a contour line; the contour line includes a parabola, and the guide line is a straight line, a curve, or is composed of a straight line and a curve.

3. The optical system suitable for high and low beam functions according to claim 2, characterized in that: The guide line of the reflective imaging unit (2) is located in a vertical plane parallel to the driving direction, and the guide line is at 45 degrees to the driving direction.

4. The optical system suitable for high and low beam functions according to claim 3, characterized in that: The guide line of the reflective imaging unit (2) is the normal line of the plane where the outline of the reflective imaging unit (2) is located, and the focus of the outline of the reflective imaging unit (2) coincides with the focus of the optical system.

5. The optical system suitable for high and low beam functions according to claim 4, characterized in that: The focus of the contour line of the refractive imaging unit (3) in the vertical plane is the focus of a parabola symmetrical along the guide line of the reflective imaging unit (2).

6. The optical system suitable for high and low beam functions according to claim 5, characterized in that: The primary optical unit (1), the reflective imaging unit (2) and the refractive imaging unit (3) are adapted to be formed as an integral piece.

7. The optical system suitable for high and low beam functions according to claim 5, characterized in that: The primary optical unit (1), the reflective imaging unit (2) and the refractive imaging unit (3) are adapted to be formed as separate parts.

8. The optical system suitable for high and low beam functions according to claim 7, characterized in that: The contour line shape of the independent refractive imaging unit (3) in the vertical plane is any one or more combinations of plano-convex, convex-planar, biconvex and biconcave.

9. The optical system suitable for high and low beam functions according to claim 5 or 6, characterized in that: A baffle (4) is provided on a side deviating from the primary optical unit (1), and the baffle (4) is formed into a light-dark cutoff line shape.

10. The optical system suitable for high and low beam functions according to claim 1, characterized in that: The primary optical unit (1) is a condenser, which allows part of the light to directly reach the focal plane of the optical system, and part of the light to reach the total reflection surface and then be reflected to the focal plane of the optical system, thereby forming the required uniform light distribution at the focal plane.

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