Aspheric lens

Abstract

The utility model relates to the technical field of optical 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 is formed in the lens body, a placement opening is formed in the side, facing the mounting surface, of the light inlet cavity, and a convex cone structure protruding downwards is arranged in the center of the top of the light inlet cavity. A concave cone structure which is concave downwards is arranged in the center of the top of the light-emitting face, and the convex cone structure and the concave cone structure are coaxially arranged. The light emitted by the lens has better uniformity and better light emitting angle, and the use requirements of the lamp in different scenes can be met.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical equipment technical field, especially a kind of aspheric lens. BACKGROUND

[0002] LED lamp gradually becomes the mainstream choice of lighting tool due to its advantages of high brightness, energy saving and lightness. LED lighting lamps and lanterns include ceiling lamp and direct down lamp. The existing ceiling lamp and direct down lamp need LED patch lamp bead and single lens to cooperate 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 for lamp design shape, light uniformity, light shape structure etc. The existing ordinary lens is insufficient to meet. Therefore, new lens structure needs to be designed as the basis to meet the use demand of lamps and lanterns in different scenes. SUMMARY

[0003] In order to overcome the deficiencies in the prior art, the utility model provides a new design of aspheric lens for optical structure.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme: an aspheric lens, comprising a lens body, the lens body includes oppositely arranged mounting surface and light emitting surface, the lens body is provided with a light inlet on one side of the mounting surface, the top center position of the light inlet is provided with a convex cone structure protruding downward, the top center position of the light emitting surface is provided with a concave cone structure recessed downward, and the convex cone structure and the concave cone structure are coaxially arranged.

[0005] Further, the lens body is a rotary body structure.

[0006] Further, the mounting surface is provided with a recessed lamp bead placement site, and the light inlet is opened from the lamp bead placement site to the light emitting surface.

[0007] Further, the mounting surface is provided with a recessed lamp bead placement site, and the light inlet is opened from the lamp bead placement site to the light emitting surface.

[0008] Further, the lens body material is polycarbonate.

[0009] Further, the lens body material is acrylic.

[0010] Further, the lens body produces a symmetrical light distribution curve, the light beam peak angle of the C0° / 180° cross section of the lens is 149°±5°, the light beam peak angle of the C90° / 270° cross section is 149°±5°, and the light distribution curve is narrow and long.

[0011] From the description of the utility model above, compared with the prior art, the aspheric lens provided by the utility model has better uniformity after light is emitted through the lens, has a better light emission angle, and can meet the use requirements of the lamp in different scenes. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a schematic view of the aspheric lens structure of the utility model.

[0013] Figure 2 It is a sectional view of the aspheric lens of the utility model.

[0014] Figure 3 It is a light distribution curve diagram of the polar coordinate system of the utility model.

[0015] Figure 4 It is a light distribution curve diagram of the rectangular coordinate system of the utility model.

[0016] Corresponding marks in the figure are as follows: 1 - mounting surface, 11 - lamp bead insertion site, 2 - light emission surface, 21 - concave cone structure, 3 - light inlet cavity, 31 - convex cone structure. DETAILED DESCRIPTION

[0017] The utility model will be further described through specific embodiments.

[0018] Referring to Figures 1 to 2 Fig. 1, an aspheric lens includes a lens body, and the material of the lens body is polycarbonate or acrylic. The lens body is a rotary body structure.

[0019] The lens body includes a mounting surface 1 and a light emission surface 2 arranged oppositely, and the lens body is provided with a light inlet cavity 3. The light inlet cavity 3 is provided with an insertion port on the side facing the mounting surface. The top center position of the light inlet cavity 3 is provided with a convex cone structure 31 protruding downward, and the top center position of the light emission surface 2 is provided with a concave cone structure 21 recessed downward. The convex cone structure 31 and the concave cone structure 21 are coaxially arranged.

[0020] The mounting surface 1 is provided with a recessed lamp bead insertion site 11, and the light inlet cavity 3 is further opened toward the light emission surface direction from the lamp bead insertion site 11. The mounting surface is provided with a texture.

[0021] The light distribution curve generated by the lens body is close to symmetry, the beam peak angle of the C0° / 180° cross section of the lens is 149°±5°, the beam peak angle of the C90° / 270° cross section is 149°±5°, and the light distribution curve is narrow and long.

[0022] Figure 3 , Figure 4 It is a test experimental data graph, and the light distribution curve generated by the light emission of the lamp bead installed on the 2835 or 3030 patch lamp bead of the optical lens of the application.Figure 3 The light distribution curve of the polar coordinate system. Figure 4 The light distribution curve of the rectangular coordinate system, which shows the divergent spatial light intensity distribution. The generated spatial light intensity distribution is close to symmetry, the beam peak angle of C0° / 180° and C90° / 270° cross-section is ±74.5°, the beam peak angle is about 149°, the light distribution curve is narrow and slender. The light rays emitted through the aspheric lens of the application have better uniformity and better light emission angle, which can meet the use requirements of the lamp in different scenes.

[0023] The above is only one specific embodiment of the present application, but the design concept of the present application is not limited to this. Any non-substantial change to the present application using this concept shall be deemed to infringe 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 lens body is provided with light inlet cavity, the light inlet cavity is provided with entrance on one side towards the mounting surface, the top center of the light inlet cavity is provided with convex cone structure protruding downward, the top center of the light emitting surface is provided with concave cone structure recessed downward, the convex cone structure and the concave cone structure are coaxially arranged.

2. The aspherical lens according to claim 1, wherein: The lens body is a rotary body structure.

3. The aspherical lens of claim 1, wherein: The mounting surface is provided with recessed lamp bead placement site, the light inlet cavity is further opened towards the light emitting surface direction from the lamp bead placement site.

4. The aspherical lens of claim 1, wherein: The mounting surface is provided with embossed lines.

5. The aspherical lens of claim 1, wherein: The lens body material is polycarbonate.

6. The aspherical lens of claim 1, wherein: The lens body material is acrylic.

7. The aspherical lens of claim 1, wherein: The light distribution curve generated by the lens body is close to symmetry, the beam peak angle of the lens C0° / 180° cross section is 149°±5°, the beam peak angle of the lens C90° / 270° cross section is 149°±5°, the light distribution curve is narrow and slender.

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