A lens structure

Abstract

The utility model provides a kind of lens structure, with the advantages of large irradiation surface, uniform and soft light spot, strong diffusion and mixed light ability, including lens main body, lens main body front is light exit surface, light exit surface adopts hexagonal compound eye microstructure;Lens main body back is light entrance surface, light entrance surface adopts four pyramid microstructure, lens main body is equipped with ring wall at back circumference, optical cavity is formed between ring wall and light entrance surface, optical cavity is located just above light source.

Description

Technical Field

[0001] This utility model relates to the technical field of lighting fixtures, and in particular to a lens structure. Background Technology

[0002] With the advancement of lighting technology, people are increasingly pursuing greater functionality in lighting fixtures, especially in terms of eye protection. As the rate of myopia among modern people is rising and affecting younger people, people are paying more and more attention to eye protection.

[0003] As a common lighting tool for work and study, traditional desk lamps generally use incandescent and halogen lamps as light sources. These lamps have disadvantages such as easy wear and tear, serious heat generation, and generally small illumination area. In addition, they generally only use monochromatic light sources, which can have a certain impact on the optic nerve with prolonged use. Utility Model Content

[0004] The purpose of this invention is to provide a lens structure that has the advantages of a large illumination area, uniform and soft light spot, and strong ability to diffuse and mix light.

[0005] To achieve the above objectives, the lens structure provided by this utility model includes a lens body, the front of the lens body being a light-emitting surface with a hexagonal compound eye microstructure; the back of the lens body being a light-incident surface with a square pyramidal microstructure; a ring wall is provided around the back of the lens body, and an optical cavity is formed between the ring wall and the light-incident surface, with the optical cavity located directly above the light source.

[0006] Furthermore, the light source uses multiple LED beads of different color temperatures arranged in a cross pattern.

[0007] Furthermore, the light source uses multiple SMD2835 LEDs.

[0008] Furthermore, the light from the light source enters the optical cavity, mixes, and then illuminates the incident light surface before finally exiting from the exit light surface.

[0009] Furthermore, the hexagonal compound eye microstructure is composed of a dense array of hexagonal microlenses.

[0010] Furthermore, the tetrahedral pyramidal microstructure is composed of a dense array of tetrahedral pyramidal micro-reflection / refractive units.

[0011] Furthermore, an outer ring is provided on the upper circumference of the lens body, with the light-incident surface located inside the outer ring, and several fixing grooves are recessed on the outer ring.

[0012] In the lens structure of this invention, the light-emitting surface adopts a hexagonal compound eye microstructure, which can divide and recombine light rays, thereby better mixing light rays of different color temperatures, resulting in a more uniform and softer light spot transition without yellow spots. The light-incident surface adopts a four-sided pyramidal microstructure mirror with numerous tilted reflective / refractive surfaces, which can simultaneously manipulate light rays in multiple directions, thus giving the light-incident surface the characteristic of emitting light rays in all directions, thereby increasing the illumination area. The hollow optical cavity design on the back of the lens allows light rays of different color temperatures from the light source to be mixed in the optical cavity before entering the lens microstructure, further improving the light mixing effect. Moreover, the hollow design makes the overall weight of the lens lighter, reducing the cost of lens raw materials.

[0013] In summary, the lens structure of this utility model has a better effect on mixing and diffusing light. Therefore: 1. It can be matched with light sources with multi-color temperature LEDs to mix different color temperatures, so that the lamps using this lens can switch between different color temperatures in different scenarios to relieve visual fatigue and protect the eyes; 2. Under the same illumination area, the lens of this utility model has a better light diffusion effect, so the lens itself can be smaller in size, and the light-emitting surface structure of the whole lamp can also be designed with a smaller size, thereby reducing the cost of the whole lamp. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the light-emitting surface structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the light-incident surface structure of this utility model.

[0016] Figure 3 This is a cross-sectional view of the present invention.

[0017] Figure 4 This is a schematic diagram of the structure of a light source that can be used in conjunction with this utility model.

[0018] Figure 5 This is a light distribution curve diagram of the lens of this utility model.

[0019] Figure 6 This is a schematic diagram of the light spot of the lens of this utility model.

[0020] Explanation of reference numerals: 1 Lens body; 11 Light-emitting surface; 12 Light-incident surface; 13 Ring wall; 14 Outer ring; 141 Fixing groove; A Optical cavity; 2 Light source; 21 Lamp bead. Detailed Implementation

[0021] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0022] This utility model provides a lens structure, including a lens body 1.

[0023] See Figure 1 The lens body 1 has a light-emitting surface 11 on its front side, which adopts a hexagonal compound eye microstructure. The hexagonal compound eye microstructure is composed of a dense array of hexagonal microlenses. The hexagonal compound eye microstructure can divide and recombine light, thereby better mixing light of different color temperatures. The light spot transition is more uniform and softer and there are no yellow spots. Therefore, this utility model can be matched with a light source 2 with multi-color temperature LED beads 21 to mix different color temperatures. This allows the lamps using this lens to switch between different color temperatures in different scenarios to relieve visual fatigue and protect the eyes.

[0024] See Figure 2 The back of the lens body 1 is the light-incident surface 12, which adopts a square pyramid microstructure. The square pyramid microstructure is composed of a dense array of square pyramid micro-reflective / refractive units. The square pyramid microstructure mirror has many tilted reflective / refractive surfaces, which can simultaneously manipulate light in multiple directions, thus giving the light-incident surface 12 the characteristic of radiating light in all directions, thereby increasing the illumination area. Therefore, under the same illumination area, the lens of this invention has a better light diffusion effect, so the lens itself can be made smaller, and the overall light-emitting surface structure of the lamp can also be designed in a smaller size, thereby reducing the cost of the entire lamp.

[0025] See Figure 3 The lens body 1 has a circumferential wall 13 on its back side, forming an optical cavity A between the circumferential wall 13 and the light-incident surface 12. When used with a light source 2, the optical cavity A is positioned directly above the light source 2. Light from the light source 2 enters the optical cavity A, mixes, and then illuminates the light-incident surface 12 before exiting from the light-out surface 11. The optical cavity A allows light of different color temperatures from the light source 2 to mix before entering the lens microstructure, further enhancing the light mixing effect. Furthermore, the hollow design of the optical cavity A makes the overall weight of the lens lighter, reducing the cost of lens raw materials.

[0026] See Figure 5 The figure shows the light distribution curve of the lens of this utility model. The curve is symmetrical and has a large angle, indicating that the light emitted from light source 2, after being refracted / reflected by the lens, has a uniform light intensity distribution in all directions of space, and the beam covers a wide range. (See also...) Figure 6 The diagram shows the light spot of the lens of this invention. The light spot has a large illumination area, a uniform transition, and no yellow spots, resulting in a soft and comfortable visual effect. Therefore, Figure 5 , Figure 6 This demonstrates that the present invention has a good ability to mix and diffuse light.

[0027] In summary, the lens structure of this invention has a superior effect in mixing and diffusing light, possessing advantages such as a large illumination area, uniform and soft light spot, and strong light diffusion and mixing capabilities. Due to the strong light mixing capability of this lens, when used as a desk lamp lens, it can also support the desk lamp in switching between different color temperatures in different scenarios, alleviating visual fatigue.

[0028] See Figure 4 The light source 2 uses multiple LED beads 21 with different color temperatures arranged in a cross pattern, wherein the LED beads 21 can be SMD2835 LED beads 21.

[0029] Preferably, the present invention may further include an outer ring 14 protruding outward from the upper end of the annular wall 13 of the lens body 1. The light-incident surface 12 and the optical cavity A are located inside the outer ring 14. The outer ring 14 is recessed with several fixing grooves 141 (in this embodiment, three fixing grooves 141 are provided). The fixing grooves 141 are used to fix (click) the lens when it is assembled and used in the lamp. The outer ring 14 surrounds the outer periphery of the optical cavity A and is located at the upper end of the annular wall 13, which makes the lens more aesthetically pleasing. Moreover, the fixing grooves 141 that need to be recessed can be set on the outer ring 14 without affecting the refraction / reflection of light by the optical cavity A and the light-incident surface 12.

[0030] The above is merely one embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lens structure, comprising a lens body, characterized in that, The front of the lens body is the light-emitting surface, which adopts a hexagonal compound eye microstructure; the back of the lens body is the light-incident surface, which adopts a square pyramid microstructure. The lens body has a ring wall around the back, and an optical cavity is formed between the ring wall and the light-incident surface. The optical cavity is located directly above the light source.

2. The lens structure according to claim 1, characterized in that, The light source uses multiple LED beads of different color temperatures arranged in a cross pattern.

3. A lens structure according to claim 1 or 2, characterized in that, The light source uses multiple SMD2835 LEDs.

4. A lens structure according to claim 1, characterized in that, The light from the light source enters the optical cavity, mixes, and then shines onto the incident light surface before finally exiting from the exit light surface.

5. A lens structure according to claim 1, characterized in that, The hexagonal compound eye microstructure is composed of a dense array of hexagonal microlenses.

6. A lens structure according to claim 1, characterized in that, The tetrahedral pyramidal microstructure is composed of a dense array of tetrahedral pyramidal micro-reflection / refractive units.

7. A lens structure according to claim 1, characterized in that, The lens body has an outer ring that bulges outward from the upper end of the ring wall, and the light incident surface is located inside the outer ring. Several fixing grooves are recessed on the outer ring.

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