Lens with adjustable light emitting angle, optical system and lamp

Abstract

The utility model relates to the technical field of optical lenses, and provides a lens with an adjustable light-emitting angle, an optical system and a lamp, the lens with the adjustable light-emitting angle comprises an annular lens body, the light-emitting surface of the lens body is provided with a plurality of light-gathering parts, the light-gathering parts are distributed in an annular array, and the curvature of the light-gathering parts continuously changes in the circumferential direction. Compared with the prior art, angle adjustment can be achieved only by rotating the lens by a small angle in the circumferential direction, the mechanical movement amount is small, only one lens and only one layer of optical structure are needed, the optical structure is simple, and the light efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of optical lens technology, and more specifically, to a lens with an adjustable light emission angle, an optical system, and a lamp. Background Technology

[0002] In the field of lighting fixtures, in order to adjust the light emission angle, existing technologies generally use an array of multiple LED light sources and a combination of multiple lenses. By adjusting the relative position of the lenses, the light emission angle and the light spot can be adjusted by axial or rotational movement. This method involves a large amount of mechanical movement, a complex system structure, and low light efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a lens, optical system, and lamp with adjustable light emission angle to overcome the shortcomings of the prior art.

[0004] This utility model is achieved through the following technical solution:

[0005] A lens with an adjustable light emission angle includes a ring-shaped lens body. The light emission surface of the lens body has several light-concentrating parts, which are arranged in a ring array. The curvature of the light-concentrating parts changes continuously in the circumferential direction.

[0006] Optionally, the light-incident surface of the lens body is a plane or a concave curved surface.

[0007] This utility model also provides another type of lens with an adjustable light emission angle, including a ring-shaped lens body. The light emission surface of the lens body has a plurality of light-concentrating parts, which are distributed in a circular array. Each light-concentrating part includes at least two light-concentrating regions with different curvatures.

[0008] Optionally, the light-incident surface of the lens body is a plane or a concave curved surface.

[0009] This utility model also provides an optical system, including a lens with adjustable light emission angle as described in any one of the above, and a ring-shaped PCB board. Several groups of lamps are arranged in a ring array on the PCB board, and each group of lamps includes several LEDs arranged at intervals along the radial direction. The position of each group of lamps corresponds one-to-one with each focusing part.

[0010] This utility model also provides a lamp, including the above-described optical system.

[0011] The technical solution of this utility model has at least the following advantages and beneficial effects: In this utility model, the lens body is paired with a PCB board, and several focusing parts are set on the lens body. The focusing parts are distributed in a circular array. By making the curvature of the focusing parts continuously change in the same direction of the circumference, or by making the focusing parts have at least two focusing areas with different curvatures, in practical applications, rotating the lens body changes the corresponding position of the lamp group and the focusing parts on the PCB board, causing the light to be focused and deflected to different degrees, thereby achieving the adjustment of the light output angle. Compared with the prior art, angle adjustment can be achieved by rotating the lens by a small angle in the circumferential direction. The mechanical movement is small, and only one lens and one layer of optical structure are required. The optical structure is simple and the light efficiency is high. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a lens structure with an adjustable light emission angle provided in Embodiment 1;

[0013] Figure 2 This is a schematic diagram of a lens structure with an adjustable light emission angle provided in Embodiment 2;

[0014] Figure 3 This is a schematic diagram of the structure of an optical system provided in Embodiment 3;

[0015] Figure 4 This is a schematic diagram of the structure of an optical system provided in Example 4;

[0016] Figure 5 These are diagrams showing the distribution of LEDs on the PCB board in Examples 3 and 4.

[0017] Figure 6 This is the optical path diagram when the lamp group is relative to the large curvature region in Example 4;

[0018] Figure 7 This is the optical path diagram when the lamp group is relative to the intermediate curvature region in Example 4;

[0019] Figure 8 This is the optical path diagram when the lamp group is relative to the small curvature region in Example 4;

[0020] Reference numerals: 1-Lens body, 101-Concentrating part, 1011-Large curvature area, 1012-Intermediate curvature area, 1013-Small curvature area, 2-PCB board, 3-LED light. Detailed Implementation

[0021] Example 1

[0022] refer to Figure 1A lens with an adjustable light emission angle includes a ring-shaped lens body 1. The light emission surface of the lens body 1 has a plurality of light-concentrating parts 101. The light-concentrating parts 101 are arranged in a ring array. The curvature of the light-concentrating parts 101 changes continuously in the circumferential direction. That is, the curvature of the light-concentrating parts 101 is different at different positions in the circumferential direction. When viewed along one direction of the circumference, the curvature can gradually increase (or decrease), or it can both increase and decrease.

[0023] In practical applications, the lens body 1 is paired with a PCB board 2 on which the lamp assembly is mounted. By rotating the lens body 1, the corresponding positions of the lamp assembly and the focusing part 101 on the PCB board 2 are changed, causing different focusing and refraction of the light (it is easy to understand that the smaller the curvature of the focusing part 101 on the light-emitting surface, the smaller the focusing and refraction of the light, and the relatively larger the light beam exit angle; conversely, the larger the curvature of the focusing part 101 on the light-emitting surface, the greater the focusing and refraction of the light, and the relatively smaller the light beam exit angle), thereby achieving adjustment of the light exit angle. Compared with existing technologies, angle adjustment can be achieved by rotating the lens by a small angle in the circumferential direction, with minimal mechanical movement. Moreover, only one lens and one layer of optical structure are required, resulting in a simple optical structure and high light efficiency.

[0024] In this embodiment, the light-incident surface of the lens body 1 is a plane. In other embodiments, the light-incident surface of the lens body 1 may also be a concave curved surface. Of course, whether the light-incident surface of the lens body 1 is a plane or a concave curved surface is only a preferred choice, not a limitation. In some embodiments, the light-incident surface of the lens body 1 may also be a convex curved surface.

[0025] Example 2

[0026] refer to Figure 2 This embodiment provides a lens with an adjustable light emission angle, which differs slightly in structure from Embodiment 1. It includes a ring-shaped lens body 1, and the light emission surface of the lens body 1 has a plurality of focusing portions 101 arranged in a circular array. Each focusing portion 101 includes at least two focusing regions with different curvatures. For example, in this embodiment, each focusing portion 101 has three focusing regions, thus achieving three different light emission angles. It is readily understood that in other embodiments, the focusing portion 101 may also have other numbers of focusing regions.

[0027] Similarly, in practical applications, the lens body 1 is paired with the PCB board 2 on which the lamp assembly is mounted. By rotating the lens body 1, the lamp assembly corresponds to different focusing areas, causing different focusing deflections of the light (it's easy to understand that the smaller the curvature of the focusing area, the smaller the focusing deflection of the light, and the larger the beam exit angle; conversely, the larger the curvature of the focusing area, the larger the focusing deflection of the light, and the smaller the beam exit angle), thereby achieving adjustment of the light exit angle. Compared with existing technologies, angle adjustment can be achieved by rotating the lens by a small angle in the circumferential direction, with minimal mechanical movement. Moreover, only one lens and one optical layer are required, resulting in a simple optical structure and high light efficiency.

[0028] In this embodiment, the light-incident surface of the lens body 1 is a plane. In other embodiments, the light-incident surface of the lens body 1 may also be a concave curved surface. Of course, whether the light-incident surface of the lens body 1 is a plane or a concave curved surface is only a preferred choice, not a limitation. In some embodiments, the light-incident surface of the lens body 1 may also be a convex curved surface.

[0029] Example 3

[0030] refer to Figure 3 This embodiment provides an optical system, including the lens with adjustable light emission angle provided in Embodiment 1, and a ring-shaped PCB board 2. Several groups of lamps are arranged in a ring array on the PCB board 2, each group including several LEDs 3 spaced apart radially (see reference). Figure 5 Each group of lamps corresponds one-to-one with each focusing part 101. It should be understood that the PCB is located on the light-incident surface side of the lens body 1 (i.e., the side away from the focusing part 101). In practical applications, by rotating the lens body 1 within the angular range of a single focusing part 101, each group of lamps can be positioned directly opposite different curvature positions of the focusing part 101, thereby achieving adjustment of the light output angle.

[0031] Example 4

[0032] refer to Figure 4 This embodiment provides an optical system, including the lens with adjustable light emission angle provided in embodiment 2, and also includes a ring-shaped PCB board 2. Several groups of lamps are arranged in a ring array on the PCB board 2, and each group of lamps includes several LEDs 3 arranged at intervals along the radial direction (see reference). Figure 5 Each group of lamps is positioned in a one-to-one correspondence with each focusing part 101. It should be understood that the PCB is located on the light-incident surface side of the lens body 1 (i.e., the side away from the focusing part 101). In practical applications, by rotating the lens body 1 within the angular range covered by all focusing areas of a single focusing part 101, each group of lamps can be aligned with focusing areas of different curvatures, thereby achieving adjustment of the light output angle.

[0033] For ease of description, among the three focusing regions, the region with the largest curvature is defined as the large curvature region 1011, the region with the smallest curvature is defined as the small curvature region 1013, and the region in between is defined as the intermediate curvature region 1012. The optical path diagram when the lamp assembly is relative to the large curvature region 1011 is as follows. Figure 6 As shown, the optical path diagram when the lamp assembly is relative to the intermediate curvature region 1012 is as follows: Figure 7 As shown, the optical path diagram when the lamp assembly is relative to the small curvature region 1013 is as follows: Figure 8 As shown.

[0034] Example 5

[0035] This embodiment provides a lamp that uses the optical system provided in embodiment 3. In other embodiments, the optical system provided in embodiment 4 can also be used.

[0036] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A lens with an adjustable light emission angle, characterized in that, It includes a ring-shaped lens body, the light-emitting surface of the lens body has several light-concentrating parts, the light-concentrating parts are distributed in a ring array, and the curvature of the light-concentrating parts changes continuously in the circumferential direction.

2. The lens with adjustable light emission angle according to claim 1, characterized in that, The incident surface of the lens body is either a plane or a concave curved surface.

3. A lens with an adjustable light emission angle, characterized in that, It includes a ring-shaped lens body, the light-emitting surface of the lens body has several light-concentrating parts, the light-concentrating parts are distributed in a circular array, and the light-concentrating parts include at least two light-concentrating regions with different curvatures.

4. The lens with adjustable light emission angle according to claim 3, characterized in that, The incident surface of the lens body is either a plane or a concave curved surface.

5. An optical system comprising a lens with an adjustable light emission angle as described in any one of claims 1-4, characterized in that, It also includes a ring-shaped PCB board, on which several groups of lights are arranged in a ring array. Each group of lights includes several LED lights arranged at intervals along the radial direction, and the position of each group of lights corresponds one-to-one with each spotting part.

6. A lamp, characterized in that, Includes the optical system described in claim 5.

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