Lens, light reflecting device and lamp

Abstract

The utility model provides a lens, a light reflecting device and a lamp, and relates to the technical field of illumination. The lens comprises a light inlet part for light inlet and a light outlet part for light outlet, the light inlet part comprises a central light inlet surface and a refraction and reflection unit, and the light outlet part comprises a central light outlet surface and a light outlet surface; the lens further comprises a convex lens part coaxially located in the center, and the center light inlet face and the center light outlet face are correspondingly arranged to be a light inlet face and a light outlet face of the convex lens part. The catadioptric unit comprises a refracting surface and a reflecting surface; the refracting surfaces are used for refracting light passing through the refracting surfaces, so that the light is emitted to the corresponding reflecting surfaces; the reflecting surface is used for reflecting light rays emitted to the reflecting surface, so that the light rays are emitted to the light outgoing surface; the central light-emitting surface and the outer light-emitting surface each comprise a light-uniformizing structure used for uniformizing light. According to the lens, the light uniformity and the reflectivity can be effectively improved, the light emitting effect is improved, the utilization efficiency of light energy is improved, energy consumption is reduced, and the thickness of the lens can be smaller.

Description

Technical Field

[0001] This application relates to the field of lighting technology, and in particular to a lens, a reflector and a lamp. Background Technology

[0002] Lighting equipment is widely used in daily life, film and television shooting, industrial inspection and other scenarios. Some existing lighting equipment, such as fill lights and floodlights, usually include a light source and a lens. The lens can change the direction of the light emitted by the light source to obtain the corresponding lighting effect.

[0003] Taking supplementary lighting as an example, in actual use, existing lenses have a weak ability to control the light emitted by the light source: when the light passes through the lens, the overall distribution of the light is uneven, resulting in problems such as poor uniformity of the light spot. Utility Model Content

[0004] The purpose of this application is to overcome the deficiencies of the prior art and provide a lens, a reflector and a lamp to solve the problems in the prior art.

[0005] To address the aforementioned problems, a first aspect of this application provides a lens, including a light-inlet portion for light intake and a light-outlet portion for light emission. The light-inlet portion includes a central light-inlet surface and a refractive element, and the light-outlet portion includes a central light-outlet surface and an outer light-outlet surface.

[0006] The lens also includes a convex lens portion coaxially located at the center, and the central light-inlet surface and the central light-outlet surface are respectively configured as the light-inlet surface and the light-outlet surface of the convex lens portion;

[0007] The refractive and reflective unit includes a refractive surface and a reflective surface corresponding to the refractive surface; the refractive surface is used to refract light rays passing through it so that the light rays are directed toward the corresponding reflective surface; the reflective surface is used to reflect light rays directed toward it so that the light rays are directed toward the outgoing light surface.

[0008] Both the central light-emitting surface and the outer light-emitting surface include a light-uniforming structure for uniform light distribution.

[0009] In one possible implementation, a textured structure is provided on the reflective surface, the textured structure being used to increase the roughness of the reflective surface.

[0010] In one possible implementation, the area of ​​the central light-emitting surface is S1, the area of ​​the outer light-emitting surface is S2, and the ratio of S2 to S1 is X1, where 1 < X1 ≤ 8.

[0011] In one possible implementation, the light-uniforming structure includes a plurality of first light-uniforming units and a plurality of second light-uniforming units, wherein the first light-uniforming units are all disposed on the central light-emitting surface, and the second light-uniforming units are all disposed on the light-emitting surface;

[0012] Both the first light-diffusing unit and the second light-diffusing unit include a convex bead surface;

[0013] The radius of the circumcircle of the first uniform light unit is R1, and the radius of the circumcircle of the second uniform light unit is R2. The ratio of R2 to R1 is X2, where 1≤X2≤4.

[0014] In one possible implementation, both the refracting surface and the reflecting surface are arranged around the central light-incoming surface;

[0015] The light-emitting surface is arranged around a receiving cavity, wherein the central light-emitting surface is disposed within the receiving cavity;

[0016] Both the refracting surface and the reflecting surface include a first end and a second end disposed opposite to each other; along the axial direction of the lens, the first end is farther from the light-emitting part than the second end; wherein, from the first end to the second end, the inner diameter of the refracting surface gradually decreases, and the inner diameter of the reflecting surface gradually increases.

[0017] In one possible implementation, there are multiple catadioptric units, which are arranged sequentially along the radial direction of the lens;

[0018] In the same catadioptric unit, the first end of the refracting surface and the first end of the reflecting surface are connected to the far end of the catadioptric unit;

[0019] In two adjacent catadioptric units, the second end of the reflecting surface of one catadioptric unit is connected to the second end of the refracting surface of the other catadioptric unit.

[0020] In one possible implementation, from the center of the lens to its outer periphery, all the catadioptric units are sequentially named as first catadioptric unit, second catadioptric unit, ..., Nth catadioptric unit; wherein, the first catadioptric unit is closest to the axis of the lens, and the Nth catadioptric unit is farthest from the axis of the lens;

[0021] A plane passing through the geometric center of the convex lens portion and perpendicular to the lens's axis is defined as the lens's center plane; wherein...

[0022] Compared to the distal end of the second catadioptric unit, the distal end of the first catadioptric unit is further away from the central surface;

[0023] The second catadioptric unit is sequentially connected to the Nth catadioptric unit, with the far end arranged in a stepped manner and the distance between it and the center surface gradually increasing.

[0024] A second aspect of this application provides a reflective device, including a housing and a lens as described above; wherein the housing includes a mounting cavity, and the lens is fixed within the mounting cavity;

[0025] The housing has a light-entry hole, and the light-entry part of the lens faces the light-entry hole. The light-entry hole is used to install a light source or to allow light emitted by the light source to pass through.

[0026] In one possible implementation, the housing is provided with a first connecting portion and a second connecting portion; wherein the first connecting portion is used for detachably connecting a light control accessory, and the second connecting portion is used for detachably connecting the light source.

[0027] In one possible implementation, the housing is provided with heat dissipation holes; wherein, the heat dissipation holes are closer to the second connecting portion than to the first connecting portion;

[0028] The first connecting part includes a magnetic component, and the second connecting part includes a snap-fit ​​structure.

[0029] A third aspect of this application provides a lighting fixture, including a light source and a reflector as described above.

[0030] The beneficial effects of this application include:

[0031] The lens proposed in this application includes a light-inlet section for light intake and a light-outlet section for light output. The light-inlet section includes a central light-inlet surface and a catadioptric unit, and the light-outlet section includes a central light-outlet surface and an outer light-outlet surface. The lens also includes a convex lens section coaxially located at the center, with the central light-inlet surface and the central light-outlet surface correspondingly configured as the light-inlet and light-outlet surfaces of the convex lens section. Both the central light-outlet surface and the outer light-outlet surface include a light-homing structure for uniform light distribution.

[0032] Some of the light emitted by the light source is directed toward the central light-receiving surface, while some of the light is directed toward the reflective unit.

[0033] Light rays entering through the central light-inlet surface exit through the central light-outlet surface, thus achieving a focusing effect. Because the central light-outlet surface includes a uniform light-dispersing structure, the light rays emitted from the central light-outlet surface can be evenly scattered, thereby obtaining a more uniform light spot.

[0034] Light rays entering through the catadioptric unit are refracted by the refracting surface and reflected by the reflecting surface. During this process, some of the light rays are totally internalized and emitted from the outgoing light surface, thereby achieving precise control of the light rays, improving the reflectivity of the light rays, and increasing the efficiency of light energy utilization. Since the outgoing light surface includes a uniform light structure, the light rays emitted from the outgoing light surface can be scattered evenly, thus obtaining a more uniform light spot.

[0035] In addition, since both the central light-emitting surface and the outer light-emitting surface include a uniform light structure, the light rays emitted from the central light-emitting surface and the light rays emitted from the outer light-emitting surface can overlap, thereby further improving the uniformity of the light spot.

[0036] This lens can effectively improve light uniformity and reflectivity, thereby improving the light output effect, increasing the efficiency of light energy utilization, reducing energy consumption, and allowing the lens to be thinner. Attached Figure Description

[0037] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 A first schematic diagram of a lens is shown;

[0039] Figure 2 It shows Figure 1 Second schematic diagram of the middle lens;

[0040] Figure 3 It shows Figure 1 A cross-sectional view of the middle lens;

[0041] Figure 4 A partial schematic diagram of a central light-emitting surface is shown;

[0042] Figure 5 A partial schematic diagram of an externally illuminated surface is shown;

[0043] Figure 6 A schematic diagram of a reflective device is shown;

[0044] Figure 7 It shows Figure 6 Front view of the reflector;

[0045] Figure 8 A schematic diagram of a light-controlling accessory is shown;

[0046] Figure 9A schematic diagram of a light control accessory and a reflector assembled together is shown.

[0047] Explanation of key component symbols:

[0048] 10-Lens; 100-Convex lens section; 110-Central light-entry surface; 120-Central light-exit surface; 200-Cautious and reflective unit; 210-Refracting surface; 220-Reflecting surface; 300-Outgoing light-exit surface; 310-Receiving cavity; 410-First light-diffusing unit; 420-Second light-diffusing unit; 500-Housing; 501-Light-entry hole; 502-Heat dissipation hole; 510-First connecting part; 520-Second connecting part; 530-Light control accessory; 531-Mounting bracket. Detailed Implementation

[0049] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0050] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0051] In this application, uniform light distribution refers to the uniform distribution of light rays and the obtaining of uniform light spots.

[0052] Example

[0053] like Figures 1-3 As shown, this embodiment proposes a lens 10, including a light-inlet section for light intake and a light-outlet section for light emission. Light emitted from a light source enters the lens 10 through the light-inlet section and exits through the light-outlet section. The light-inlet section includes a central light-inlet surface 110 and a catadioptric unit 200, and the light-outlet section includes a central light-outlet surface 120 and an outer light-outlet surface 300.

[0054] The lens 10 also includes a convex lens portion 100. The convex lens portion 100 is located at the center of the lens 10 and is coaxially arranged with the lens 10.

[0055] The central light-inlet surface 110 is the light-inlet surface of the convex lens section 100, and the central light-outlet surface 120 is the light-outlet surface of the convex lens section 100. The central light-inlet surface 110 and the central light-outlet surface 120 are arranged opposite to each other and are located on both sides of the convex lens section 100.

[0056] The convex lens portion 100 has a light-focusing function, wherein when light passes through the convex lens portion 100, a light-focusing effect is achieved. The central light-entry surface 110 and the central light-exit surface 120 are both parts of a sphere, wherein the convex direction of the central light-entry surface 110 and the central light-exit surface 120 is opposite to the geometric center of the convex lens portion 100.

[0057] The catadioptric unit 200 includes a refracting surface 210 and a reflecting surface 220 corresponding to the refracting surface 210. The refracting surface 210 can be a plane or a curved surface, and the reflecting surface 220 can be a plane or a curved surface.

[0058] Each catadioptric unit 200 includes a refracting surface 210 and a reflecting surface 220. The refracting surface 210 refracts light rays passing through it so that the light rays are directed toward the corresponding reflecting surface 220; the reflecting surface 220 reflects light rays directed toward it so that the light rays are directed toward the outgoing light surface 300.

[0059] Both the central light-emitting surface 120 and the outer light-emitting surface 300 include a light-homing structure for uniform light distribution.

[0060] Part of the light emitted by the light source is directed toward the central light-entry surface 110, and part of the light is directed toward the reflective unit 200.

[0061] Light rays entering through the central light-inlet surface 110 are emitted from the central light-outlet surface 120, thereby achieving a light-focusing effect. Since the central light-outlet surface 120 includes a uniform light structure, the light rays emitted from the central light-outlet surface 120 can be evenly scattered, thus obtaining a more uniform light spot.

[0062] The light rays entering through the refractive indexing unit 200 are refracted by the refractive surface 210 and reflected by the reflective surface 220. During this process, this part of the light rays is totally internalized and emitted from the outgoing light surface 300, thereby achieving precise control of the light rays, improving the reflectivity of the light rays, and increasing the efficiency of light energy utilization. Since the outgoing light surface 300 includes a uniform light structure, the light rays emitted from the outgoing light surface 300 can be evenly scattered, thereby obtaining a more uniform light spot.

[0063] In addition, since both the central light-emitting surface 120 and the outer light-emitting surface 300 include a uniform light structure, the light rays emitted from the central light-emitting surface 120 and the light rays emitted from the outer light-emitting surface 300 can overlap, thereby further improving the uniformity of the light spot.

[0064] As can be seen from the above analysis, the lens 10 proposed in this embodiment can effectively improve light uniformity and reflectivity, thereby improving the light output effect, increasing light energy utilization efficiency, and reducing energy consumption. Specifically, the lens 10 proposed in this embodiment is a TIR lens.

[0065] In this embodiment, a textured structure is provided on the reflective surface 220 to increase its roughness. The textured reflective surface 220 enhances the reflection effect, effectively increasing the lens magnification and reducing light scattering onto the housing 500. This improves light energy utilization, reduces energy consumption, and allows for a thinner overall lens 10. Furthermore, the textured reflective surface 220 enables diffuse reflection, allowing light to diffusely propagate in different directions and exit from the outer light-emitting surface 300, resulting in a more uniform light spot.

[0066] In this embodiment, the area of ​​the central light-emitting surface 120 is S1, and the area of ​​the outer light-emitting surface 300 is S2. The ratio of S2 to S1 is X1, where 1 < X1 ≤ 8. This means that the area of ​​the outer light-emitting surface 300 is larger than the area of ​​the central light-emitting surface 120. A larger outer light-emitting surface 300 ensures that more light rays are emitted from it, and allows for the placement of more uniform light-distributing structures on the outer surface. Thus, while maintaining light transmittance, the uniformity of the light spot is further improved.

[0067] However, the area of ​​the outgoing light-emitting surface 300 should not be too large. Specifically, the area of ​​the outgoing light-emitting surface 300 needs to be limited based on the aforementioned X1. If the outgoing light-emitting surface 300 is too large, only a very small proportion of the light generated by the light source will be emitted from the central light-emitting surface 120, which will affect the light-gathering effect of the lens 10. For example, in some embodiments, X1 can be 3, 4.28, 5.76, 7.4, etc.

[0068] The outer contour of the central light-emitting surface 120 is circular, and the outer contour of the outer light-emitting surface 300 is an annular structure. The central light-emitting surface 120 is surrounded by the outer light-emitting surface 300.

[0069] Reference Figure 1 , Figure 4 and Figure 5In this embodiment, the light-uniforming structure includes multiple first light-uniforming units 410 and multiple second light-uniforming units 420. The first light-uniforming units 410 are all disposed on the central light-emitting surface 120, and the second light-uniforming units 420 are all disposed on the outer light-emitting surface 300. The number of first light-uniforming units 410 is determined based on their own size and the area of ​​the central light-emitting surface 120, and the number of second light-uniforming units 420 is determined based on their own size and the area of ​​the outer light-emitting surface 300. The number of first light-uniforming units 410 and second light-uniforming units 420 can generally be dozens, hundreds, or thousands, or even more.

[0070] Both the first homogenizing unit 410 and the second homogenizing unit 420 include a convex bead surface. The bead surface includes an arc surface.

[0071] The radius of the circumcircle of the first light-diffusing unit 410 is R1, and the radius of the circumcircle of the second light-diffusing unit 420 is R2. The ratio of R2 to R1 is X2, where 1 ≤ X2 ≤ 4. In some embodiments, X2 can be 1.3, 2, 3.1, etc.

[0072] The outer periphery of both the first homogenizing unit 410 and the second homogenizing unit 420 is a polygon or a polygon-like shape. Polygons and polygon-like shapes refer to planar figures composed of three or more edges connected end to end in sequence: for polygons, all edges are straight line segments; for polygon-like shapes, at least one edge is a curved segment.

[0073] Each position on the central light-emitting surface 120 is provided with a first light-diffusing unit 410. For any two adjacent first light-diffusing units 410, one edge of one unit coincides with one edge of the other, thus eliminating gaps between adjacent units. Each position on the outer light-emitting surface 300 is provided with a second light-diffusing unit 420. For any two adjacent second light-diffusing units 420, one edge of one unit coincides with one edge of the other, thus eliminating gaps between adjacent units.

[0074] like Figure 3 As shown, the refracting surface 210 and the reflecting surface 220 are both arranged around the central light-entry surface 110. Furthermore, the refracting surface 210, the reflecting surface 220, the central light-entry surface 110, the central light-exit surface 120, and the light-exiting surface 300 are all coaxially arranged and coaxial with the axis of the lens 10.

[0075] When assembling the lens 10 and the light source, the light source should be directly facing the central light-entry surface 110. In this way, the light emitted from the center of the light source will be directed toward the central light-entry surface, and the light emitted from the side of the light source will be directed toward the catadioptric unit 200.

[0076] like Figure 3 As shown, the light-emitting surface 300 surrounds a receiving cavity 310, wherein the central light-emitting surface 120 is disposed within the receiving cavity 310.

[0077] Both the refracting surface 210 and the reflecting surface 220 include a first end and a second end disposed opposite to each other. Along the axial direction of the lens 10, the first end is farther from the light-emitting portion than the second end. Specifically, from the first end to the second end, the inner diameter of the refracting surface 210 gradually decreases, while the inner diameter of the reflecting surface 220 gradually increases. Figure 3 In the diagram, the dashed line x represents the axis of the lens 10. The end where the refractive surface 210 and the reflective surface 220 are located at the top is the first end, and the end where the refractive surface 210 and the reflective surface 220 are located at the bottom is the second end.

[0078] In this embodiment, there are multiple catadioptric units 200, which are arranged sequentially along the radial direction of the lens 10. The number of catadioptric units 200 can be set as needed, such as two, three, four, or five. The lens 10 in the figure includes four catadioptric units 200. By adjusting and optimizing the height of all refractive surfaces 210 and reflective surfaces 220, the thickness of the lens 10 can be made thinner.

[0079] In the same catadioptric unit 200, the first end of the refracting surface 210 and the first end of the reflecting surface 220 are connected to the far end of the catadioptric unit 200. In two adjacent catadioptric units 200, the second end of the reflecting surface 220 of one catadioptric unit 200 is connected to the second end of the refracting surface 210 of the other catadioptric unit 200.

[0080] Reference Figure 3 From the center to the outer periphery of lens 10, all catadioptric units are named sequentially as first catadioptric unit, second catadioptric unit, ..., Nth catadioptric unit. Among them, the first catadioptric unit is closest to the axis of lens 10, and the Nth catadioptric unit is farthest from the axis of lens 10.

[0081] A plane passing through the geometric center of the convex lens portion 100 and perpendicular to the axis of the lens 10 is defined as the center plane of the lens. For example... Figure 3 As shown, the dashed line y represents the projection of the central plane in the illustrated direction. The distance from the far end of the first catadioptric unit to the central plane is greater than that of the far end of the second catadioptric unit; the far ends of the second to the Nth catadioptric units are arranged in a stepped manner, with the distance from the central plane gradually increasing. This structural arrangement allows for a thinner lens 10 while maintaining light efficiency and without increasing the surface area of ​​the light-emitting part.

[0082] like Figures 6-9As shown, in this embodiment, a reflective device is also proposed, including a housing 500 and the lens 10 mentioned above.

[0083] The housing 500 includes a mounting cavity, and the lens 10 is fixed inside the mounting cavity. The lens 10 can be fixedly connected to the housing 500 by means of screws, snap-fit, or other methods.

[0084] The housing 500 has a light inlet hole 501, and the light inlet part of the lens 10 faces the light inlet hole 501. The light inlet hole 501 is used to install a light source or to allow light emitted by the light source to pass through.

[0085] In this embodiment, the housing 500 is provided with a first connecting portion 510 and a second connecting portion 520. The first connecting portion 510 is used for detachably connecting the light control accessory 530, and the second connecting portion 520 is used for detachably connecting the light source.

[0086] The light control accessory 530 includes a light-blocking plate, a grille, and color filters. The light control accessory 530 is mounted on a mounting bracket 531, and is detachably connected to the first connecting portion 510 via the mounting bracket 531. The first connecting portion 510 includes a magnetic component or a snap-fit ​​structure, and the second connecting portion 520 includes a snap-fit ​​structure or a magnetic component. The magnetic component includes a magnet, and the snap-fit ​​structure includes a slot, a snap-fit, etc. In this embodiment, the first connecting portion 510 uses a magnetic component, and the second connecting portion 520 uses a snap-fit ​​structure.

[0087] The housing 500 is provided with heat dissipation holes 502, which allow air circulation and thus dissipate heat from the light source. This improves the durability and stability of the reflector and the light source, and prevents heat generated by the light source from accumulating inside the housing 500, which would affect the performance and lifespan of the light source and the housing 500. Specifically, compared to the first connecting part 510, the heat dissipation holes 502 are closer to the second connecting part 520. This arrangement makes the heat dissipation holes 502 closer to the light source, effectively improving heat dissipation and ensuring that no heat accumulates inside the housing 500. It also prevents light leakage through the heat dissipation holes 502 and prevents heat emitted by the lamp body from entering the housing 500 through the heat dissipation holes 502.

[0088] In this embodiment, a lighting fixture is also provided, including a light source and the reflector mentioned above. The light source includes an RGB lamp.

[0089] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0090] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A lens comprising a light-inlet portion for light intake and a light-outlet portion for light output, characterized in that, The light-inlet section includes a central light-inlet surface and a refractive unit, and the light-outlet section includes a central light-outlet surface and an outer light-outlet surface; The lens also includes a convex lens portion coaxially located at the center, and the central light-inlet surface and the central light-outlet surface are respectively configured as the light-inlet surface and the light-outlet surface of the convex lens portion; The catadioptric unit includes a refractive surface and a reflective surface corresponding to the refractive surface; The refracting surface is used to refract light rays that have passed through it, so that the light rays are directed toward the corresponding reflecting surface; The reflective surface is used to reflect the light rays incident on itself, so that the light rays are directed towards the outgoing light surface; Both the central light-emitting surface and the outer light-emitting surface include a light-uniforming structure for uniform light distribution.

2. The lens according to claim 1, characterized in that, A textured structure is provided on the reflective surface, and the textured structure is used to increase the roughness of the reflective surface.

3. The lens according to claim 1, characterized in that, The area of ​​the central light-emitting surface is S1, the area of ​​the outer light-emitting surface is S2, and the ratio of S2 to S1 is X1, where 1 < X1 ≤ 8.

4. The lens according to claim 1, characterized in that, The light-uniform structure includes multiple first light-uniform units and multiple second light-uniform units. The first light-uniform units are all disposed on the central light-emitting surface, and the second light-uniform units are all disposed on the outer light-emitting surface. Both the first light-diffusing unit and the second light-diffusing unit include a convex bead surface; The radius of the circumcircle of the first uniform light unit is R1, and the radius of the circumcircle of the second uniform light unit is R2. The ratio of R2 to R1 is X2, where 1≤X2≤4.

5. The lens according to claim 1, characterized in that, Both the refracting surface and the reflecting surface are arranged around the central light-incoming surface; The light-emitting surface is arranged around a receiving cavity, wherein the central light-emitting surface is disposed within the receiving cavity; Both the refracting surface and the reflecting surface include a first end and a second end disposed opposite to each other; along the axial direction of the lens, the first end is farther from the light-emitting part than the second end; wherein, from the first end to the second end, the inner diameter of the refracting surface gradually decreases, and the inner diameter of the reflecting surface gradually increases.

6. The lens according to claim 5, characterized in that, There are multiple catadioptric and reflective units, which are arranged sequentially along the radial direction of the lens; In the same catadioptric unit, the first end of the refracting surface and the first end of the reflecting surface are connected to the far end of the catadioptric unit; In two adjacent catadioptric units, the second end of the reflecting surface of one catadioptric unit is connected to the second end of the refracting surface of the other catadioptric unit.

7. The lens according to claim 6, characterized in that, From the center to the outer periphery of the lens, all the catadioptric units are named sequentially as first catadioptric unit, second catadioptric unit, ..., Nth catadioptric unit; wherein, the first catadioptric unit is closest to the axis of the lens, and the Nth catadioptric unit is farthest from the axis of the lens; A plane passing through the geometric center of the convex lens portion and perpendicular to the lens's axis is defined as the lens's center plane; wherein... Compared to the distal end of the second catadioptric unit, the distal end of the first catadioptric unit is further away from the central surface; The second catadioptric unit is sequentially connected to the Nth catadioptric unit, with the far end arranged in a stepped manner and the distance between it and the center surface gradually increasing.

8. A reflective device, characterized in that, The system includes a housing and a lens according to any one of claims 1-7; wherein the housing includes a mounting cavity, and the lens is fixed within the mounting cavity; The housing has a light-entry hole, and the light-entry part of the lens faces the light-entry hole. The light-entry hole is used to install a light source or to allow light emitted by the light source to pass through.

9. The reflective device according to claim 8, characterized in that, The housing is provided with a first connecting part and a second connecting part; wherein, the first connecting part is used for detachably connecting the light control accessory, and the second connecting part is used for detachably connecting the light source.

10. The reflective device according to claim 9, characterized in that, The housing is provided with heat dissipation holes; wherein, compared with the first connecting part, the heat dissipation holes are closer to the second connecting part; The first connecting part includes a magnetic component, and the second connecting part includes a snap-fit ​​structure.

11. A lamp, characterized in that, It includes a light source and a reflective device as described in any one of claims 8-10.

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