Aspheric lens

Abstract

The utility model relates to the technical field of lighting equipment, in particular to an aspherical lens. The lens comprises a lens body, the lens body comprises a mounting surface and a light emitting surface which are oppositely arranged, a light inlet cavity formed by the mounting surface is formed in the lens body, the light emitting surface comprises a plurality of cambered surfaces, the cambered surfaces are arranged around a central shaft in an annular array mode, and the cambered surfaces extend from the outer side to the central shaft along an upwards-protruding arc path. The width of each cambered surface is reduced from outside to inside in the direction from the outer side to the center shaft, all the cambered surfaces converge at one point from the center shaft, and the convergent point is in a concave state. The light emitted by the aspheric lens has better uniformity and better light emitting angle, and can meet the use requirements of lamps in different scenes.

Description

TECHNICAL FIELD

[0001] The utility model relates to lighting equipment technical field, especially non -spherical lens. BACKGROUND

[0002] LED lamp gradually becomes the mainstream choice of lighting tool because of its high brightness, energy saving, light and nimble advantage. LED lighting lamp includes ceiling lamp and direct down lamp. The existing ceiling lamp and direct down lamp need LED patch lamp bead and single lens cooperation to realize the divergent distribution of light beam. With the improvement of people's pursuit of high quality life demand, new requirements are put forward to the lamp design shape, light uniformity, light shape structure etc. The existing ordinary lens is insufficient to meet. Therefore, a new lens structure needs to be designed as the basis to meet the use demand of lamp in different scenes. SUMMARY

[0003] In order to overcome the defects in the prior art, the utility model provides a newly designed non -spherical lens.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme: a non -spherical lens, including lens body, the lens body includes the mounting surface and the light emitting surface arranged oppositely, the light cavity formed by the mounting surface is arranged in the lens body, the light emitting surface includes a plurality of arc surfaces, each arc surface is arranged in a circular array around a center axis, the arc surface extends from the outside to the center axis along an upward convex arc line path, and the arc surface is reduced in width from the outside to the center axis, each arc surface converges at a point at the center axis, and the convergence point is in a concave state.

[0005] Further, the number of the arc surface is N, N is a natural number, and N is greater than or equal to 12.

[0006] Further, N is one of 12, 16, 18 and 20.

[0007] Further, the mounting surface and the light emitting surface further form an outer side wall, the outer side wall is formed by the vertical extension of the outer edge of each arc surface towards the mounting surface, and the outer side wall is a polygonal outer wall structure.

[0008] Further, the outer side wall and the mounting surface are provided with a grain.

[0009] Further, the mounting surface is provided with a recessed step surface, the step surface is provided with a recessed lamp bead placement position, and the light cavity is formed by the lamp bead placement position towards the light emitting surface.

[0010] Further, the light inlet cavity forms a taper structure from the mounting surface to the light outlet surface, the light inlet cavity comprises a plurality of light inlet portions combined from the mounting surface to the light outlet surface, each light inlet portion is formed by an array of curved surfaces around a central axis, the number of curved surfaces included in each light inlet portion is consistent, the number of curved surfaces in each light inlet portion array is M, M is a natural number, and M is greater than or equal to 6.

[0011] Further, the lens body material is one of polycarbonate and acrylic.

[0012] Further, the light distribution curve generated by the lens body is a symmetrical structure, the light beam peak angles of C0° / 180° and C90° / 270° sections are ±75°, the light beam peak angle is 150°±5°, the light distribution curve is narrow and slender.

[0013] From the above description of the utility model, compared with the prior art, the aspheric lens provided by the utility model has the following advantages: light rays enter the lens body through the wall of the light inlet cavity and are refracted, and then the light rays are refracted again by the arc surfaces or the outer wall to pass through the lens body. The light rays emitted from the aspheric lens of the present application have better uniformity and better light emission angle, which can meet the use requirements of the lamp in different scenes. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a perspective view of the aspheric lens of the utility model.

[0015] Figure 2 It is a perspective view of the aspheric lens of the utility model.

[0016] Figure 3 It is a perspective view of the aspheric lens of the utility model.

[0017] Figure 4 It is a perspective view of the aspheric lens of the utility model.

[0018] Figure 5 It is a light distribution curve of the coordinate system of the utility model.

[0019] Figure 6 It is a light distribution curve of the rectangular coordinate system of the utility model.

[0020] Corresponding marks in the figure are as follows: 1-mounting surface, 11-step surface, 12-lamp bead insertion site, 2-light outlet surface, 21-arc surface, 22-central axis, 3-outer wall, 4-light inlet cavity. DETAILED DESCRIPTION

[0021] The utility model will be further described through specific embodiments.

[0022] REFERENCE Figures 1 to 4As shown, the aspheric lens includes a lens body, and the lens body material is one of polycarbonate and acrylic.

[0023] The lens body includes a mounting surface 1 and a light-emitting surface 2 disposed opposite each other. A light inlet cavity 4 is defined within the lens body by the mounting surface 1. The light-emitting surface 2 includes a plurality of arcuate surfaces 21 arranged in a circular array around a central axis 22. The number of arcuate surfaces 21 is N, where N is a natural number and N ≥ 12. Preferably, N is one of 12, 16, 18, and 20. The arcuate surfaces 21 extend from the outside to the central axis 22 along an upwardly convex arc path. The arcuate surfaces 21 decrease in width from the outside to the central axis 22. The arcuate surfaces 21 converge at a point on the central axis 22, and the convergence point is concave.

[0024] An outer wall 3 is also formed between the mounting surface 1 and the light-emitting surface 2. The outer wall 3 is formed by the outer edges of each arc surface 21 extending vertically toward the mounting surface 1. The outer wall 3 has a polygonal outer wall structure. The outer wall 3 and the mounting surface 1 are provided with sunburst patterns. The mounting surface 1 is provided with a recessed step surface 11, and a recessed lamp bead placement position 12 is provided in the step surface 11. The light inlet cavity 4 is opened from the lamp bead placement position 12 toward the light-emitting surface 2.

[0025] The light inlet cavity 4 forms a conical structure from large to small in the direction from the mounting surface 1 to the light emitting surface 2. The light inlet cavity 4 includes a plurality of layers of light inlet parts in the direction from the mounting surface 1 to the light emitting surface 2, which are combined up and down. Each layer of the light inlet part is formed by an array of curved surfaces around the central axis. The number of curved surfaces contained in each layer of the light inlet part is the same. The number of curved surfaces in each layer of the light inlet part array is M, where M is a natural number and M≥6.

[0026] The light distribution curve produced by the lens body has a symmetrical structure. The peak angles of the beams at the C0° / 180° and C90° / 270° sections are both ±75°, and the peak angle of the beam is 150°±5°. The light distribution curve is narrow and slender.

[0027] Figure 5 、 Figure 6 This is a test experiment data chart, the optical lens of the present application is installed on a 2835 or 3030 SMD lamp bead, and the light distribution curve generated by the lamp bead is shown. Figure 5 Light distribution curve in polar coordinate system. Figure 6 It is the light distribution curve of the rectangular coordinate system. As can be seen from the figure, the spatial light intensity distribution generated by the lens body is symmetrical.

[0028] The beam peak angles of the C90° / 270° and C90° / 180° sections are both ±75°, the beam peak angle is about 150°, and the light distribution curve is narrow and slender.

[0029] The above is only one specific embodiment of the present application, but the design concept of the present application is not limited thereto, and any non-substantial modification of the present application using the concept shall be deemed as an infringement of the protection scope of the present application.

Claims

1. An aspherical lens characterized by: The lens body comprises opposite mounting surface and light emitting surface, the light emitting surface comprises a plurality of arc surfaces, each arc surface is arranged in an annular array around a central axis, the arc surface extends from the outside to the central axis along an upward convex arc path, and the arc surface is reduced in width from the outside to the central axis, each arc surface converges at a point at the central axis, and the convergence point is in a concave state.

2. The aspherical lens according to claim 1, wherein: The number of the arc surfaces is N, N is a natural number, and N≥12.

3. The aspherical lens of claim 2, wherein: N is one of 12, 16, 18 and 20.

4. The aspherical lens of claim 1, wherein: The mounting surface and the light emitting surface further form an outer sidewall, the outer sidewall is formed by the vertical extension of the outer edges of the arc surfaces towards the mounting surface, and the outer sidewall is in a polygonal wall structure.

5. The aspherical lens of claim 4, wherein: The outer sidewall and the mounting surface are provided with a sunken texture.

6. The aspherical lens of claim 1, wherein: The mounting surface is provided with a recessed step surface, the step surface is provided with a recessed lamp bead placement site, and the light cavity is formed by opening the lamp bead placement site towards the light emitting surface.

7. The aspherical lens of claim 1, wherein: The light cavity is in a taper structure from large to small from the mounting surface to the light emitting surface, and the light cavity comprises a plurality of light inlet portions in the direction from the mounting surface to the light emitting surface, each light inlet portion is formed by a curved surface around the central axis, the number of the curved surfaces in each light inlet portion is consistent, the number of the curved surfaces in each light inlet portion is M, M is a natural number, and M≥6.

8. The aspherical lens of claim 1, wherein: The lens body is made of one of polycarbonate and acrylic.

9. The aspherical lens of claim 1, wherein: The light distribution curve of the lens body is in a symmetrical structure, the beam peak angle of C0° / 180° and C90° / 270° cross sections is ±75°, the beam peak angle is 150°±5°, the light distribution curve is narrow and slender.

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