A lens

Abstract

The present invention discloses a lens, including a lens body, a light inlet cavity is formed by a depression on the lens body, the light inlet cavity includes a light cavity bottom surface and four straight light cavity side surfaces connected in sequence in the circumferential direction, the lens body also includes a light outlet surface opposite to the light cavity bottom surface, the lens body also includes a first reflection surface and a second reflection surface respectively with the central axis of the lens body as a symmetric point, both of which are located between the light cavity bottom surface and the light outlet surface; the intersection of the central axis of the lens body and the plane where the free end edge of the side surface of the light cavity is located is used as the origin to establish a spatial rectangular coordinate system O‑xyz. The present invention designs a lens that mixes and regulates light, and the light-emitting surface emits light uniformly without obvious dark areas. There is no need for light mixing of conventional light-guiding structures, the overall thickness of the lens is reduced, which is conducive to the processing and molding of the lens, reduces the optical path loss of light in the lens, further improves the light efficiency, and is also convenient for assembly and combination use, with strong versatility and wide application.

Description

Technical Field

[0001] The invention relates to the technical field of lamps, and in particular to a lens. Background Art

[0002] As an important accessory in lamps, lenses have important functions such as changing the light path, converging light, and setting the light flux. Therefore, the change in the lighting effect of lamps brought about by designing and optimizing the lens is huge. Furthermore, the optimization and design of optical lenses is also the progress pursued by optical application solutions. Summary of the invention

[0003] In view of the above situation, the present invention provides a lens to achieve better use effect, and the solution is as follows:

[0004] A lens comprises a lens body, wherein a light inlet cavity is formed by a depression on the lens body, wherein the light inlet cavity comprises a light cavity bottom surface and four straight light cavity side surfaces which are connected in sequence in the circumferential direction, wherein the lens body further comprises a light exit surface which is opposite to the light cavity bottom surface, wherein the lens body further comprises a pair of first reflection surfaces and a pair of second reflection surfaces which are centrally symmetrical with the central axis of the lens body as a symmetry point, wherein the pair of first reflection surfaces and the pair of second reflection surfaces are arranged at intervals in the circumferential direction, wherein the first reflection surfaces and the second reflection surfaces are both located between the light cavity bottom surface and the light exit surface; wherein a spatial rectangular coordinate system O-xyz is established with the intersection of the central axis of the lens body and the plane where the free end edge of the light cavity side surface is located as an origin, and wherein:

[0005] The equation for the bottom surface of the optical cavity is:

[0006] z=-0.0112x 3 +0.1005x 2 -0.0031x+A, A is a constant;

[0007] The equation for the first reflecting surface is:

[0008] z=-0.0027x 3 +0.1349x 2 -0.2103xB, B is a constant;

[0009] The equation for the second reflection surface is:

[0010] z=8.0284yC, C is a constant.

[0011] Furthermore, the adjacent first reflecting surface and second reflecting surface are connected as one.

[0012] Furthermore, one end of the first reflecting surface and the second reflecting surface is connected to the light emitting surface, and the other opposite end is connected to the free end edge of the side surface of the optical cavity.

[0013] Furthermore, the constant A ranges from 3.9 to 4.1; the constant B ranges from 2.2 to 2.4; and the constant C ranges from 27.8 to 28.2.

[0014] Furthermore, the light emitting surface includes a plurality of identical light emitting surface units, the light emitting surface units are in the shape of regular polygons in the circumferential direction, and the light emitting surface units protrude outwards.

[0015] Furthermore, the second reflective surface is an electroplated mirror reflective plane.

[0016] Furthermore, it also includes a pair of positioning buckles, and the two positioning buckles are respectively arranged on the two first reflecting surfaces and are staggered. The two positioning buckles are centrally symmetrical with the central axis of the lens body as the symmetry point. One end of the positioning buckle is connected to a position close to the light emitting surface, and the other end extends to one side of the light inlet cavity as a free end.

[0017] Furthermore, the lens body and the positioning buckle are both made of polycarbonate and formed in one piece.

[0018] Beneficial effects: The invention is novel in concept, reasonable in design, and easy to use. The invention designs a lens that mixes and regulates light, and the light-emitting surface emits light evenly without obvious dark areas. It does not require the mixing of light of a conventional light-guiding structure, reduces the overall thickness of the lens, is conducive to the processing and molding of the lens, reduces the optical path loss of light in the lens, further improves the light efficiency, and is easy to assemble and use in combination, has strong versatility, and is widely used. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of an embodiment of the present invention from a viewing angle.

[0020] Figure 2 It is a structural schematic diagram of an embodiment of the present invention from another perspective.

[0021] Figure 3 It is a schematic cross-sectional structural diagram of an embodiment of the present invention.

[0022] Figure 4 It is another cross-sectional structural schematic diagram of an embodiment of the present invention.

[0023] Figure 5 It is a schematic diagram of an optical path analysis in one embodiment of the present invention.

[0024] Figure 6 It is a schematic diagram of an optical path analysis in one embodiment of the present invention.

[0025] Figure 7 It is a schematic diagram of an optical path analysis in one embodiment of the present invention. DETAILED DESCRIPTION

[0026] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments as a further preferred explanation:

[0027] refer to Figure 1-Figure 7 A lens comprises a lens body 100, wherein a light inlet cavity 110 is formed by a depression on the lens body 100, wherein the light inlet cavity 110 comprises a light cavity bottom surface 111 and four straight light cavity side surfaces 112 which are connected in sequence in the circumferential direction, wherein the lens body 100 further comprises a light outlet surface 120 which is opposite to the light cavity bottom surface 111, wherein the lens body 100 further comprises a pair of first reflection surfaces 130 and a pair of second reflection surfaces 140 which are centrally symmetrical with respect to the central axis of the lens body 100 as a symmetric point, wherein the pair of first reflection surfaces 130 and the pair of second reflection surfaces 140 are arranged at intervals in the circumferential direction, and the first reflection surfaces 130 and the second reflection surfaces 140 are both located between the light cavity bottom surface 111 and the light outlet surface 120; wherein a spatial rectangular coordinate system O-xyz is established with the intersection of the central axis of the lens body 100 and the plane where the free end edge of the light cavity side surface 112 is located as an origin, and wherein

[0028] The equation for the optical cavity bottom surface 111 is:

[0029] z=-0.0112x 3 +0.1005x 2 -0.0031x+A, A is a constant;

[0030] The equation for the first reflective surface 130 is:

[0031] z=-0.0027x 3 +0.1349x 2 -0.2103xB, B is a constant;

[0032] The equation for the second reflective surface 140 is:

[0033] z=8.0284yC, C is a constant.

[0034] In a specific implementation, as a preferred manner, the adjacent first reflective surface 130 and the second reflective surface 140 are connected as a whole. In a specific implementation, as a preferred manner, one end of the first reflective surface 130 and the second reflective surface 140 are connected to the light emitting surface 120, and the other opposite end is connected to the free end edge of the optical cavity side surface 112.

[0035] In the specific implementation, as a preferred method, the constant A ranges from 3.9 to 4.1; the constant B ranges from 2.2 to 2.4; and the constant C ranges from 27.8 to 28.2. In the specific implementation process, in the specific parameters of a specific product, the A value is 3.9969, the B value is 2.2711, the C value is 28.0096, and z = -0.0112x 3 +0.1005x 2 -0.0031x+A In the equation, the range of x is 0≤x<2.8, and the correlation coefficient is 0.9998; z=-0.0027x 3 +0.1349x 2 -0.2103xB In the equation, the range of x is 0≤x≤10, z≥0, and the correlation coefficient is 0.9999. The surface is the lens TIR total reflection surface; z=8.0284yC In the equation, the range of y is 0≤y≤5, the correlation coefficient is 1, z≥0, and the unit is mm.

[0036] In a specific implementation, as a preferred mode, the light emitting surface 120 includes a plurality of identical light emitting surface units, which are circumferentially regular polygonal and protrude outward. In a specific implementation, the light emitting surface units are regular hexagonal and are arranged in a honeycomb shape.

[0037] In a specific implementation, as a preferred mode, the second reflection surface 140 is an electroplated mirror reflection plane. In a specific implementation, as a preferred mode, a pair of positioning buckles 200 are also included, and the two positioning buckles 200 are respectively arranged on the two first reflection surfaces 130, and are staggered. The two positioning buckles 200 are centrally symmetrical with the central axis of the lens body 100 as the symmetry point. One end of the positioning buckle 200 is connected to a position close to the light exit surface 120, and the other end extends to one side of the light inlet cavity 110 as a free end. In a specific implementation, as a preferred mode, the lens body 100 and the positioning buckle 200 are both made of polycarbonate and are formed in one piece.

[0038] The principle of this scheme is that the optical path analysis is as follows Figure 5-7As shown, the light source is set at the three-dimensional coordinate point O. For the second reflective surface 140, the angle α between the light and the edge of the second reflective surface 140 corresponding to the bottom surface 111 of the optical cavity is in the range of 0°≤α<31°, and finally the range of irradiation from the light-emitting surface 120 is within the range W, avoiding the dark area. Correspondingly, the light of the light source 31°≤α≤90° is refracted and reflected by the corresponding side surface 112 of the optical cavity and the reflection plane of the second reflective surface 140, effectively supplementing the areas with weak light intensity on both sides, and increasing the proportion of light output in the large angle direction. Similarly, for the first reflective surface 130, the angle β between the light and the edge of the first reflective surface 130 corresponding to the bottom surface 111 of the optical cavity is also in the range of 0°-31°, and the light of the part of 31°≤β≤90° is refracted and reflected by the corresponding side surface 112 of the optical cavity and the reflection plane of the first reflective surface 130, and collimated to enter the light-emitting surface 120. Reasonably superimposed with the light of 0°≤β<31°, the light output angle of the entire cross section is controlled to be 15° on both sides, within the range of L in the figure.

[0039] In the above scheme, the positioning buckle 200 structure is adopted, which is easy to operate and accurate in positioning. The two sets of buckles are staggered on both sides of the central axis, which is conducive to the seamless splicing of multiple modules. The outside of a single lens body 100 forms a flat surface, which is convenient for itself to be assembled as a module unit. Figure 1-4 As shown, the light emitting surface 120 forms a scale-like structure with a large tolerance.

[0040] This solution is a specific solution for lenses and is used in various lamps, especially motorcycle light signal devices, and can be used in application scenarios of light signal devices such as position lights, brake lights, and turn signals. By rationally allocating light, point light emission is converted into surface light emission, and the light emission surface emits light evenly without dark areas. There is no need for light mixing of conventional light guide structures, which reduces the overall thickness of the lens, facilitates the processing and molding of the lens, reduces the optical path loss of light in the lens, and further improves the light efficiency.

[0041] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A lens, characterized in that: The invention comprises a lens body (100), wherein a light inlet cavity (110) is formed by a depression on the lens body (100), wherein the light inlet cavity (110) comprises a light cavity bottom surface (111) and light cavity side surfaces (112) connected in a circumferential direction in sequence, wherein the lens body (100) further comprises a light outlet surface (120) located opposite to the light cavity bottom surface (111), and wherein the lens body (100) further comprises a pair of first reflection surfaces (130) and a pair of second reflection surfaces (140) which are centrally symmetrical with respect to the central axis of the lens body (100) as a symmetrical point, wherein the pair of first reflection surfaces (130) and a pair of second reflection surfaces (140) are centrally symmetrical. A pair of second reflection surfaces (140) are arranged circumferentially at intervals, and the first reflection surface (130) and the second reflection surface (140) are both located between the optical cavity side surface (112) and the light exit surface (120); a spatial rectangular coordinate system O-xyz is established with the intersection of the central axis of the lens body (100) and the plane where the free end edge of the optical cavity side surface (112) is located as the origin, the direction from the origin toward the first reflection surface (130) as the x-axis, the direction from the origin toward the second reflection surface (140) as the y-axis, and the central axis of the lens body (100) as the z-axis, The equation for the bottom surface (111) of the optical cavity is: z=-0.0112x 3 +0.1005x 2 -0.0031x+A, A is a constant, and the constant A ranges from 3.9 to 4.1; The equation for the first reflecting surface (130) is: z=-0.0027x 3 +0.1349x 2 -0.2103xB, B is a constant, and the constant B ranges from 2.2 to 2.4; The equation for the second reflecting surface (140) is: z=8.0284yC, C is a constant, and the constant C ranges from 27.8 to 28.2; The light source is arranged at the origin, and the angle α between the light emitted by the light source and the bottom surface (111) of the optical cavity and the z-axis is in the range of 0°≤α<31°, and the illumination range of the light within the angle range is ultimately within the range of 80° to the left and right of the z-axis from the light exit surface (120); the angle α between the light emitted by the light source and the side surface (112) of the optical cavity and the z-axis is in the range of 31°≤α≤90°, and the light within the angle range is supplemented by the areas with weaker light intensity on both sides through refraction and reflection of the corresponding side surface (112) of the optical cavity and the second reflection surface (140); The angle β between the light emitted by the light source and irradiated onto the bottom surface (111) of the optical cavity and the z-axis is in the range of 0°≤β<31°, and the angle β between the light emitted by the light source and irradiated onto the side surface (112) of the optical cavity and the z-axis is in the range of 31°≤β≤90°. The light within the angle range is refracted and reflected by the corresponding side surface (112) of the optical cavity and the first reflection surface (130), collimated to enter the light exiting surface (120), and is superimposed with the light within the angle of 0°≤β<31°, so that the entire light exiting angle is controlled within a range of 15° to the left and right of the z-axis.

2. The lens according to claim 1, characterized in that: The adjacent first reflecting surface (130) and second reflecting surface (140) are connected as one body.

3. The lens according to claim 2, characterized in that: One end of the first reflecting surface (130) and the second reflecting surface (140) is connected to the light emitting surface (120), and the other opposite end is connected to the free end edge of the side surface (112) of the optical cavity.

4. The lens according to claim 1, wherein: The light emitting surface (120) comprises a plurality of identical light emitting surface units, the light emitting surface units are in the shape of regular polygons in the circumferential direction, and the light emitting surface units protrude outwards.

5. The lens according to claim 1, wherein: The second reflection surface (140) is an electroplated mirror reflection plane.

6. The lens according to claim 1, wherein: It also includes a pair of positioning buckles (200), and the two positioning buckles (200) are respectively arranged on the two first reflecting surfaces (130) and are staggered. The two positioning buckles (200) are centrally symmetrical with the central axis of the lens body (100) as the symmetry point. One end of the positioning buckle (200) is connected to a position close to the light emitting surface (120), and the other end serves as a free end and extends toward one side of the light inlet cavity (110).

7. The lens according to claim 1, wherein: The lens body (100) and the positioning buckle (200) are both made of polycarbonate and are formed in one piece.

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