Lens and luminaire

Abstract

The present application provides a kind of lens and lamp, the lens includes concave light cavity and the light cavity below and concave light exit cavity, the first light entrance surface is in the light cavity, the first light exit surface is in the light exit cavity opposite the first light entrance surface, the first microstructure is on the first light entrance surface, the second microstructure is on the first light exit surface, the light from the first microstructure is incident, and the first microstructure generates once self-mixing light, and the second microstructure is emitted and generates twice self-mixing light.Compared with prior art, the present application is simple in structure and the light emitted is uniform and free of yellow spots.

Description

Technical Field

[0001] This invention relates to the field of lighting technology, and more particularly to a lens and a lamp. Background Technology

[0002] Existing washing machine light fixtures generally use lenses with freeform surface structures, injection-molded TIR structures, or starry sky structures to make the light from the fixture shine to one side. For freeform surface structures, although the required polarization angle can be easily achieved, additional diffusion particles need to be added during processing to eliminate color difference, which is time-consuming and wasteful of materials.

[0003] In view of this, it is indeed necessary to improve the existing lenses and lamps to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a lens and a lamp to improve light output and enhance user experience.

[0005] To achieve the above objectives, the present invention provides a lens comprising a concave incident light cavity and a concave exit light cavity located below the incident light cavity. The incident light cavity has a first incident light surface, and the exit light cavity has a first exit light surface opposite to the first incident light surface. The first incident light surface has a first microstructure, and the first exit light surface has a second microstructure. Light rays incident from the first microstructure generate a first self-mixing light through the first microstructure and exit through the second microstructure, generating a second self-mixing light.

[0006] Optionally, the lens is elongated and configured to deflect light emitted from the light source toward a first direction. Both the first incident surface and the first exiting surface are curved. Furthermore, the height of the first microstructure gradually increases along the first direction, and the height of the second microstructure gradually decreases along the first direction. The second microstructure is located on the side of the first exiting surface closer to the first direction, so that light incident through the first incident surface can be refracted from the first exiting surface toward the first direction.

[0007] Optionally, the first microstructure includes a plurality of parallel strip protrusions, each protrusion of the first microstructure having an arc-shaped cross section, and the second microstructure includes a plurality of parallel strip protrusions, each protrusion of the second microstructure having an arc-shaped cross section.

[0008] Optionally, the curvature of the protrusions in the first microstructure is less than the curvature of the protrusions in the second microstructure.

[0009] Optionally, the light-incident cavity further includes a second light-incident surface and a third light-incident surface located on both sides of the first light-incident surface, the third light-incident surface and the second light-incident surface being distributed along the first direction; the lens further includes: a second light-exiting surface and a third light-exiting surface located on both sides of the light-exiting cavity and on the same plane, and a first light-controlling surface and a second light-controlling surface located on both sides of the light-incident cavity, the second light-controlling surface and the first light-controlling surface being distributed along the first direction, the angle between the first light-controlling surface and the second light-exiting surface being smaller than the angle between the second light-controlling surface and the third light-exiting surface, so that light rays incident from the second light-incident surface are reflected by the first light-controlling surface and refracted at the second light-exiting surface in a first direction, and light rays incident from the third light-incident surface are reflected by the second light-controlling surface and emitted at the third light-exiting surface in a first direction.

[0010] Optionally, on the plane containing the second and third light-emitting surfaces, the orthographic projections of the first and second microstructures at least partially overlap.

[0011] Optionally, the distance between the second light-incident surface and the third light-incident surface gradually decreases from top to bottom along the vertical direction.

[0012] Optionally, the cross-sectional length of the second light-incident surface is smaller than the cross-sectional length of the third light-incident surface.

[0013] Optionally, the cross-sectional length of the second light-emitting surface is smaller than the cross-sectional length of the third light-emitting surface.

[0014] Optionally, the light-emitting cavity has a recessed portion that is recessed toward the light-incident cavity, and the recessed portion is located between the third light-emitting surface and the second microstructure along the first direction.

[0015] Optionally, the lens further includes a pair of extensions, the pair of extensions being located on both sides of the lens, and the pair of extensions extending toward and away from the first direction, respectively.

[0016] Accordingly, the present invention also provides a lamp, including the lens described above.

[0017] Optionally, a light source module for emitting light is provided, the light source module including a light source, wherein the minimum vertical distance between the light-emitting surface of the light source and the lens is 0.6±0.3mm.

[0018] Optionally, the centerline of the light source is offset by 0.5 ± 0.5 mm from the centerline of the luminaire away from the first direction.

[0019] Compared with the prior art, the technical solution of the embodiments of the present invention has the following beneficial effects:

[0020] The lens provided by the technical solution of the present invention, through the first microstructure and the second microstructure, allows light incident from the first microstructure to generate two self-mixing light, thus producing uniform light output and effectively solving the problems of yellow spots and adjusting particle concentration. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural schematic diagram of a lamp according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic cross-sectional view of a lamp according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the cross-sectional structure of a lens according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the mounting structure of a lens and light source module according to an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the optical path of the first light-incident surface according to an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the optical path of the second light-incident surface according to an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the optical path of the third light-incident surface according to an embodiment of the present invention.

[0028] Figure label:

[0029] 100. Lighting fixtures;

[0030] 10. Housing; 11. Bracket; 12. Slide groove;

[0031] 20. Light source module; 21. Substrate; 22. Light source;

[0032] 30. Lens; 31. Entrance cavity; 311. First light-controlling surface; 312. Second light-entry surface; 313. First light-entry surface; 3131. First microstructure; 314. Third light-entry surface; 315. Second light-controlling surface;

[0033] 32. Light-emitting cavity; 321. First light-emitting surface; 3211. Second microstructure; 322. Recess; 3221. Inclined surface; 33. Second light-emitting surface; 34. Third light-emitting surface; 35. Extension. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0036] Additionally, it should be noted that the terms “comprising,” “including,” or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] like Figures 1 to 7 As shown, one embodiment of the present invention discloses a lamp 100, which includes a lens 30 for deflecting light. The lens 30 can be made of glass, including but not limited to PMMA, PC, or resin materials. The lens 30 employs a TIR architecture for light control, making the light emitted by the lamp 100 more uniform after passing through the lens 30. For clarity, the following description will use the application of this lens 30 in the lamp 100 as an example to describe the specific structure of the lamp 100 in detail.

[0038] like Figure 1 As shown, the lamp 100 includes a housing 10, a light source module 20, and a lens 30. The housing 10 is strip-shaped and has brackets 11 at both ends for mounting. The housing 10 has an optical cavity (not shown) that accommodates the light source module 20 and the lens 30. The lens 30 is located at the opening of the optical cavity, and the light source module 20 is located between the housing 10 and the lens 30.

[0039] The light source module 20 includes: a substrate 21 and a light source 22 on the substrate 21.

[0040] The light source 22 may be an LED lamp bead, and the light source 22 is oriented toward the lens 30.

[0041] Meanwhile, the substrate 21 is attached to the housing 10 so that the light source module 20 can transfer heat to the housing 10. In addition, the surface of the substrate 21 is provided with an ink coating to enhance the reflection of the light source 22 in the light emission direction and improve the luminous efficiency.

[0042] In other embodiments of the present invention, the housing 10 can be abutted and bonded to the substrate 21 by increasing the contact area, thereby enhancing heat dissipation efficiency. The specific configuration can be adjusted as needed and is not limited herein. Please refer to... Figure 1 refer to Figure 2 and Figure 3The lens 30 is elongated and configured to deflect the light emitted by the light source 22 in a first direction.

[0043] Specifically, with Figure 2 For reference, the definition is as follows: Figure 2 The left side is the first direction, and the lens 30 is used to deflect the light emitted by the light source 22 towards the first direction. Furthermore, continuing with... Figure 2 For illustrative purposes, the "up" and "down" in the attached diagram represent the vertical direction of the lamp 100. The lens 30 includes: a concave light-entry cavity 31 and a concave light-exit cavity 32 located below the light-entry cavity 31.

[0044] The light inlet cavity 31 is used to allow light to enter.

[0045] Specifically, the light-incident cavity 31 faces the light source module 20, and the light-incident cavity 31 has a first light-incident surface 313.

[0046] The light-incident cavity 31 also has a second light-incident surface 312 and a third light-incident surface 314. The second light-incident surface 312 and the third light-incident surface 314 are located on both sides of the first light-incident surface 313, and the third light-incident surface 314 and the second light-incident surface 312 are distributed along the first direction.

[0047] Specifically, the second light-incident surface 312 is connected to the first light-incident surface 313, and the third light-incident surface 314 is connected to the first light-incident surface 313. The first light-incident surface 313, the second light-incident surface 312, and the third light-incident surface 314 form the light-incident cavity 31.

[0048] The light-emitting cavity 32 is used to emit at least a portion of the light.

[0049] The light-emitting cavity 32 faces the outside of the lamp 100, and the light-emitting cavity 32 has a first light-emitting surface 321 that is opposite to the first light-incident surface 313.

[0050] The lens 30 further includes a first light-controlling surface 311 and a second light-controlling surface 315 located on both sides of the light-incident cavity 31, wherein the second light-controlling surface 315 and the first light-controlling surface 311 are distributed along a first direction.

[0051] Specifically, the second light-incident surface 312 is located between the first light-controlling curved surface 311 and the first light-incident surface 313, and the second light-incident surface 312 is connected to both the first light-controlling curved surface 311 and the first light-incident surface 313. The third light-incident surface 314 is located between the second light-controlling curved surface 315 and the first light-incident surface 313, and the third light-incident surface 314 is connected to both the second light-controlling curved surface 315 and the first light-incident surface 313.

[0052] The lens 30 further includes a second light-emitting surface 33 and a third light-emitting surface 34, the second light-emitting surface 33 and the third light-emitting surface 34 being located on the same plane, and the third light-emitting surface 34 and the second light-emitting surface 33 being distributed along the first direction.

[0053] On the plane where the second light-emitting surface 33 and the third light-emitting surface 34 are located, the orthographic projection of the light-incident cavity 31 is within the range of the orthographic projection of the light-emitting cavity 32.

[0054] Please refer to Figures 4 to 7 The light-incident cavity 31 is directly opposite the light source 22 of the light source module 20. Since the light emitted by the light source 22 is divided into three parts, they are respectively incident into the lens 30 from the second light-incident surface 312, the first light-incident surface 313 and the third light-incident surface 314.

[0055] Specifically, light rays incident from the first light-incident surface 313 are deflected towards the first light-exiting surface 321 and emitted in the first direction; light rays incident from the second light-incident surface 312 are controlled by the first light-controlling surface 311 and emitted in the first direction from the second light-exiting surface 33; light rays incident from the third light-incident surface 314 are controlled by the second light-controlling surface 315 and emitted in the first direction from the third light-exiting surface 34. This increases the overall illuminance on one side (in the first direction), thus meeting the illuminance requirements not only for the upper shelves but also for the lower shelves, thereby improving the customer experience.

[0056] It is understandable that by adjusting the ratio of the areas of the first light-incident surface 313, the second light-incident surface 312, and the third light-incident surface 314, the amount of light incident on the first light-incident surface 313, the second light-incident surface 312, and the third light-incident surface 314 can be adjusted to distribute the light emitted by the light source 22. Please continue to refer to... Figure 2 and Figure 3 The first light-incident surface 313 has a first microstructure 3131 for light mixing, and a portion of the first light-emitting surface 321 has a second microstructure 3211 for light mixing.

[0057] Please combine Figure 2 and Figure 3 refer to Figure 5 The light incident through the first light-incident surface 313 generates a first self-mixing light in the lens 30 through the first microstructure 3131, and then generates a second self-mixing light through the second microstructure 3211 when passing through the first light-out surface 321. Therefore, the emitted light can be uniform and free of yellow spots, resulting in good irradiation effect.

[0058] Please continue to combine Figure 1 refer to Figure 2 , Figure 3 and Figure 5 Both the first light-incident surface 313 and the first light-emitting surface 321 are curved surfaces. The first light-emitting surface 321 is positioned closer to the first direction than the first light-incident surface 313. Furthermore, the height of the first light-incident surface 313 gradually increases along the first direction, while the height of the first light-emitting surface 321 gradually decreases along the first direction. In other words, the distance between the first light-incident surface 313 and the first light-emitting surface 321 gradually increases along the first direction, which means that the distance between the first microstructure 3131 and the second microstructure 3211 gradually increases along the first direction.

[0059] On the one hand, by adjusting the degree to which the height of the first light-incident surface 313 increases along the first direction, light rays can be directed toward the second microstructure 3211 on the first light-exiting surface 321 after passing through the first light-incident surface 313. On the other hand, according to the principle that the angle of refraction is larger from denser to sparser light, as the degree to which the height of the first light-exiting surface 321 decreases in the first direction increases, the degree to which the light rays emitted from the first light-exiting surface 321 are deflected toward the first direction also increases.

[0060] Specifically, the second microstructure 3211 is located closer to the first direction than the first microstructure 3131. Correspondingly, on the plane containing the second light-emitting surface 33 and the third light-emitting surface 34, the orthographic projections of the first microstructure 3131 and the second microstructure 3211 at least partially overlap. Furthermore, the height of the first microstructure 3131 gradually increases along the first direction, while the height of the second microstructure 3211 gradually decreases along the first direction; that is, the distance between the first microstructure 3131 and the second microstructure 3211 gradually increases along the first direction.

[0061] In this embodiment, since the height of the first microstructure 3131 gradually increases along the first direction and the height of the second microstructure 3211 gradually decreases along the first direction, the first microstructure 3131 and the second microstructure 3211 can not only achieve secondary self-mixing light, but also make it more conducive to the light incident through the first light-incident surface 313 be deflected from the first light-outceasing surface 321 to the first direction, thereby achieving a better polarization effect and further reducing stray light that is not effectively polarized. Compared with the existing starry sky architecture, which can only illuminate the upper shelves, the present invention further increases the illumination of the lower shelves and makes the illumination more uniform, enhancing the user experience.

[0062] The height direction of the first microstructure 3131 and the height direction of the second microstructure 3211 are the vertical directions.

[0063] Specifically, the first microstructure 3131 includes several parallel strip-shaped protrusions, and the cross-section of each protrusion of the first microstructure 3131 is arc-shaped. The second microstructure 3211 includes several parallel strip-shaped protrusions, and the cross-section of each protrusion of the second microstructure 3211 is arc-shaped.

[0064] Since both the first microstructure 3131 and the second microstructure 3211 are strip-shaped protrusions, and the structure of the strip-shaped protrusions is in the stretching direction of the lens 30 (e.g., Figure 1 As shown in the diagram, the cross-sectional shape is consistent, resulting in good consistency in the light mixing and polarization effects along the stretching direction of the lens 30. Consequently, the illumination effect along the stretching direction of the lens 30 is more consistent, meaning that illumination defects with varying brightness are less likely to occur along the stretching direction of the lens 30. Furthermore, the strip-shaped protrusion structure can accommodate more light sources 22.

[0065] In addition, because the injection-molded TIR structure is formed through injection molding, the lens length should not be too long. For longer shelves, splicing is required, which can cause discontinuity in the washed surface.

[0066] In this embodiment, since both the first microstructure 3131 and the second microstructure 3211 are strip-shaped protrusions, the lens can be manufactured using an extrusion process, thereby effectively solving the problem of splicing lenses due to their short size.

[0067] The curvature of the protrusions on the first microstructure 3131 may be the same or different. Preferably, the curvature of the protrusions on the first microstructure 3131 is the same.

[0068] Similarly, the curvature of the protrusions on the second microstructure 3211 can be the same or different. Preferably, the curvature of the protrusions on the second microstructure 3211 is the same.

[0069] The curvature of the protrusions of the first microstructure 3131 and the protrusions of the second microstructure 3211 may be the same or different.

[0070] Preferably, the curvature of the protrusion of the first microstructure 3131 is less than the curvature of the protrusion of the second microstructure 3211, so as to better self-mix the light and make the illuminated surface more uniform.

[0071] In other embodiments, the first microstructure 3131 and the second microstructure 3211 may also be other forms capable of light mixing, such as elliptical or beaded surfaces, etc., which are not limited here.

[0072] Preferably, the light-emitting cavity 32 has a recessed portion 322 that is recessed towards the light-incident cavity 31, and the recessed portion 322 is located between the second microstructure 3211 and the third light-emitting surface 34. The recessed portion 322 includes a slope 3221, which can reduce the volume of the lens 30 and reduce the amount of material used to manufacture the lens 30, thus contributing to weight reduction and cost reduction. It should be noted that the slope 3221 is a total internal reflection surface, and the incident light undergoes total internal reflection on the slope 3221, so that most of the light rays are emitted from the second microstructure 3211, thereby improving the light efficiency.

[0073] Please continue to refer to this. Figure 2 , Figure 3 , Figure 6 and Figure 7 The second light-incident surface 312 and the third light-incident surface 314 are not parallel. The opening of the light-incident cavity 31 facing the side closer to the light source 22 is larger. That is to say, the distance between the second light-incident surface 312 and the third light-incident surface 314 gradually decreases from top to bottom in the vertical direction.

[0074] On the one hand, it can cause the light incident on the second light incident surface 312 to be refracted to the first light control surface 311 over a larger range, and cause the light incident on the third light incident surface 314 to be refracted to the second light control surface 315 over a larger range, thereby improving the utilization rate of the first light control surface 311 and the second light control surface 315.

[0075] On the other hand, it is easy to install and has a large tolerance for installation errors. Specifically, for example... Figure 5 As shown, when the light source 22 is an LED bead, the minimum vertical distance between the light-emitting surface of the LED bead and the lens 30 is 0.6±0.3mm, and the center line of the light source 22 is offset by 0.5±0.5mm in the second direction based on the center line of the lamp 100.

[0076] The first light-controlling surface 311 is curved away from the first direction, while the second light-controlling surface 315 is curved towards the first direction. Both the first light-controlling surface 311 and the second light-controlling surface 315 are total reflection surfaces. Therefore, compared to the first light-controlling surface 311, the second light-controlling surface 315 is more likely to deflect light in the first direction.

[0077] The angle between the first light-controlling surface 311 and the second light-emitting surface 33 is smaller than the angle between the second light-controlling surface 315 and the third light-emitting surface 34, so that light rays incident from the second light-incident surface 312 are reflected by the first light-controlling surface 311 and then polarized and emitted in the first direction at the second light-emitting surface 33, and light rays incident from the third light-incident surface 314 are reflected by the second light-controlling surface 315 and then polarized and emitted in the first direction at the third light-emitting surface 34.

[0078] It should be noted that the angle between the first light-controlling surface 311 and the second light-emitting surface 33 refers to the angle between the tangent at the point where the first light-controlling surface 311 and the second light-emitting surface 33 are connected and the second light-emitting surface 33. The angle between the second light-controlling surface 315 and the third light-emitting surface 34 refers to the angle between the tangent at the point where the second light-controlling surface 315 and the third light-emitting surface 34 are connected and the third light-emitting surface 34.

[0079] Both the first light-controlling surface 311 and the second light-controlling surface 315 are freeform surfaces.

[0080] Preferably, the curvature of the first light-controlling surface 311 is greater than that of the second light-controlling surface 315. Therefore, the first light-controlling surface 311 has a larger reflection angle than the second light-controlling surface 315, which is more conducive to the deflection of light in the first direction.

[0081] Combination Figure 3 As shown, preferably, the cross-sectional length a of the second light-incident surface 312 is smaller than the cross-sectional length b of the third light-incident surface 314, thereby reducing the amount of light entering the second light-incident surface 312, so that compared with the first light-controlling surface 311, more light is reflected by the second light-controlling surface 315, which is easier to deflect, thereby improving the light efficiency.

[0082] Correspondingly, the cross-sectional length c of the second light-emitting surface 33 is smaller than the cross-sectional length d of the third light-emitting surface 34, so that the second light-controlling surface 315 can reflect more light.

[0083] Preferably, the lens 30 further includes a pair of extensions 35, which extend toward and away from the first direction, respectively, and are located on both sides of the lens 30. The optical cavity of the housing 10 has grooves 12 that respectively accommodate the pair of extensions 35. The lens 30 can be fixed at the opening of the optical cavity of the housing 10 from the side of the housing 10 through the cooperation of the extensions 35 with the grooves 12. Of course, the lens 30 can also be fixed by snap-fitting with other fixing structures.

[0084] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A lens, characterized in that, It includes a concave light-incident cavity (31) and a concave light-outcident cavity (32) located below the light-incident cavity (31). The light-incident cavity (31) has a first light-incident surface (313), and the light-outcident cavity (32) has a first light-outcident surface (321) opposite to the first light-incident surface (313). The first light-incident surface (313) has a first microstructure (3131), and the first light-outcident surface (321) has a second microstructure (3211). Light incident from the first microstructure (3131) generates a first self-mixing light through the first microstructure (3131) and is emitted through the second microstructure (3211) to generate a second self-mixing light. The lens (30) is elongated and configured to deflect light emitted from the light source toward a first direction. Both the first light-incident surface (313) and the first light-exiting surface (321) are curved. The height of the first microstructure (3131) gradually increases along the first direction, and the height of the second microstructure (3211) gradually decreases along the first direction. The second microstructure (3211) is located on the side of the first light-exiting surface (321) closer to the first direction, so that light incident through the first light-incident surface (313) can be refracted from the first light-exiting surface (321) toward the first direction. The curvature of the protrusion of the first microstructure (3131) is less than the curvature of the protrusion of the second microstructure (3211).

2. The lens according to claim 1, characterized in that, The first microstructure (3131) includes a plurality of parallel strip protrusions, and the cross-section of each protrusion of the first microstructure (3131) is arc-shaped. The second microstructure (3211) includes a plurality of parallel strip protrusions, and the cross-section of each protrusion of the second microstructure (3211) is arc-shaped.

3. The lens according to claim 1, characterized in that, The light-incident cavity (31) also has a second light-incident surface (312) and a third light-incident surface (314) located on both sides of the first light-incident surface (313), the third light-incident surface (314) and the second light-incident surface (312) being distributed along the first direction; the lens further includes: a second light-exiting surface (33) and a third light-exiting surface (34) located on both sides of the light-exiting cavity (32) and on the same plane, and a first light-controlling curved surface (311) and a second light-controlling curved surface (315) located on both sides of the light-incident cavity (31), the second light-controlling curved surface (315) and the first light-exiting surface (313) being distributed along the first direction; The light-controlling surface (311) is distributed along the first direction. The angle between the first light-controlling surface (311) and the second light-emitting surface (33) is smaller than the angle between the second light-controlling surface (315) and the third light-emitting surface (34). This causes the light rays incident from the second light-incident surface (312) to be reflected by the first light-controlling surface (311) and refracted in the first direction at the second light-emitting surface (33). The light rays incident from the third light-incident surface (314) are reflected by the second light-controlling surface (315) and emitted in the first direction at the third light-emitting surface (34).

4. The lens according to claim 3, characterized in that, On the plane containing the second light-emitting surface (33) and the third light-emitting surface (34), the orthographic projections of the first microstructure (3131) and the second microstructure (3211) at least partially overlap.

5. The lens according to claim 3, characterized in that, The distance between the second light-incident surface (312) and the third light-incident surface (314) gradually decreases from top to bottom in the vertical direction.

6. The lens according to claim 5, characterized in that, The cross-sectional length of the second light-incident surface (312) is smaller than the cross-sectional length of the third light-incident surface (314).

7. The lens according to claim 6, characterized in that, The cross-sectional length of the second light-emitting surface (33) is smaller than the cross-sectional length of the third light-emitting surface (34).

8. The lens according to claim 3, characterized in that, The light-emitting cavity (32) has a recess (322) that is recessed toward the light-inlet cavity (31), and the recess (322) is located between the third light-emitting surface (34) and the second microstructure (3211) along the first direction.

9. The lens according to claim 1, characterized in that, The lens (30) further includes a pair of extensions (35), which are located on both sides of the lens (30) and extend toward a first direction and away from the first direction, respectively.

10. A lamp, characterized in that, include: The lens (30) as described in any one of claims 1-9.

11. The lamp according to claim 10, characterized in that, Also includes: A light source module (20) for emitting light, the light source module (20) includes a light source (22), and the minimum vertical distance between the emitting surface of the light source (22) and the lens (30) is 0.6±0.3mm.

12. The lamp according to claim 11, characterized in that: The centerline of the light source (22) is offset by 0.5 ± 0.5 mm from the centerline of the lamp (100) in the first direction.

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