Illumination module

Abstract

The utility model provides an illumination module which comprises a light source and a lens module, and the lens module comprises a bottom surface, a total reflection surface and a microstructure surface; the optical axis of the light source is located on the axis of the lens module; the bottom surface and the microstructure surface are oppositely arranged on two sides of the total reflection surface; the lens module is recessed from the side, away from the total reflection face, of the bottom face to the side, close to the total reflection face, of the bottom face to form a cavity, and the bottom face surrounds the peripheral side of the cavity. When the light source is arranged outside the cavity, the distance between the light emitting surface of the light source and the bottom surface is 0-1mm; when the light source is arranged in the cavity, the distance between the light emitting surface of the light source and the bottom surface is 0-3mm; output light of the light source is transmitted to the microstructure surface after being reflected by the fully reflecting surface; the light inlet aperture of the lens module ranges from 4 mm to 8 mm, and the light outlet aperture of the lens module ranges from 30 mm to 40 mm. The total reflection surface can gather most light rays diffused by the light source and reflect all the light rays, so that full-angle light rays of the light source can be fully utilized, the energy utilization rate of the light source is improved, and the environmental glare pressure can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of optical lenses, and in particular relates to a lighting module. Background Art

[0002] Most traditional optical solutions for blue light therapy use free-form lenses or multi-plano-convex lenses. When using a free-form single-lens optical module, blue light at large angles cannot be utilized, and a large amount of blue light overflows the treatment surface or even the bed surface, causing light pollution and low energy utilization. When using a plano-convex lens, multiple lenses need to be combined into a single module, and a mixing rod is often required for light mixing, which causes a large loss of light energy. Therefore, neither free-form lenses nor multi-plano-convex lenses can achieve the light collection function and light energy distribution function well. Most of the optical solutions currently on the market have low energy utilization, which causes the problem of blue light pollution. Utility Model Content

[0003] The technical purpose of the utility model is to provide a lighting module, aiming to solve the problem that most of the optical solutions for blue light therapy in the related art have low energy utilization rate, thus causing blue light pollution.

[0004] To solve the above technical problems, the utility model is implemented as follows: a lighting module, comprising: a light source and a lens module; the optical axis of the light source is located at the central axis of the lens module; the lens module comprises a bottom surface, a total reflection surface and a microstructure surface; the bottom surface and the microstructure surface are relatively arranged on both sides of the total reflection surface; the lens module is recessed from the side of the bottom surface away from the total reflection surface to the side close to the total reflection surface to form a cavity, and the bottom surface surrounds the circumference of the cavity; when the light source is arranged outside the cavity, the distance between the light output surface of the light source and the bottom surface is 0-1mm; when the light source is arranged in the cavity, the distance between the light output surface of the light source and the bottom surface is 0-3mm; the output light of the light source is transmitted to the microstructure surface after being reflected by the total reflection surface; the light entrance aperture of the lens module is 4-8mm, and the light exit aperture of the lens module is 30-40mm.

[0005] Furthermore, the lens module includes a TIR lens, the light incident surface of the TIR lens is the total reflection surface, and the light emitting surface of the TIR lens is the microstructure surface.

[0006] Furthermore, the lens module includes a TIR lens and a microstructure array lens, the light incident surface of the TIR lens is the total reflection surface, the light emitting surface of the microstructure array lens is the microstructure surface, and the light emitting surface of the TIR lens faces the light incident surface of the microstructure array lens.

[0007] Further, the distance between the light-emitting surface of the TIR lens and the light-incident surface of the micro-structured array lens is 0 to 30 mm.

[0008] Further, the micro-structured array lens is composed of a plurality of single-lens arrays. The number of single lenses in the horizontal direction of the micro-structured array lens is 6 to 20, and the number of single lenses in the vertical direction of the micro-structured array lens is 5 to 18.

[0009] Further, the single lens includes a rectangular single lens. The length of the rectangular single lens is 0.6 to 2 mm, and the width of the rectangular single lens is 0.5 to 1.8 mm.

[0010] Further, the micro-structured array lens is parallel to the bottom surface; or, the micro-structured array lens has a curvature, and the curvature is a first preset value.

[0011] Further, the angle between the light ray passing through the micro-structured surface and the normal line is 5° to 40°.

[0012] Further, the micro-structured surface is circular, and the radius of the micro-structured surface is 8 to 25 mm.

[0013] Further, the micro-structured surface is composed of a plurality of single micro-structured surface arrays, and the surface curvature of the single micro-structured surface is a second preset value.

[0014] Compared with the related art, the beneficial effect of an illumination module in the present utility model is that the optical axis of the light source is located on the central axis of the lens module. After the output light rays of the light source are reflected into collimated light rays by the total reflection surface, they are transmitted to the micro-structured surface. Whether the light source is arranged inside the cavity or outside the cavity, since the distance between the light source and the bottom surface is relatively close, and the total reflection surface is connected to the bottom surface, and since the light-incident aperture of the lens module is 4 - 8 mm and the light-emitting aperture of the lens module is 30 - 40 mm, therefore, even if the illumination angle of the light rays of the light source ranges from 0° to 180°, the total reflection surface can gather most of the light rays diverged by the light source and reflect all the light rays, so that the full-angle light rays of the light source can be fully utilized, the energy utilization rate of the light source can be improved, and further the environmental glare pressure can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0016] Figure 1It is a schematic three-dimensional structure diagram of the lens module in the first perspective in the embodiment of the present utility model;

[0017] Figure 2 It is a schematic three-dimensional structure diagram of the lens module in the second perspective in the embodiment of the present utility model;

[0018] Figure 3 It is a schematic structure diagram of the lighting module in the first embodiment of the present utility model;

[0019] Figure 4 It is a schematic diagram of the light transmission path in the lighting module in the first embodiment of the present utility model;

[0020] Figure 5 It is a schematic structure diagram of the lighting module in the second embodiment of the present utility model;

[0021] Figure 6 It is a schematic diagram of the light transmission path in the lighting module in the second embodiment of the present utility model;

[0022] Figure 7 It is an effect diagram of the light spot formed by the lighting module in the second embodiment of the present utility model;

[0023] Figure 8 It is a schematic diagram of the light transmission path in the lighting module in the third embodiment of the present utility model;

[0024] Figure 9 It is an effect diagram of the light spot formed by the lighting module in the third embodiment of the present utility model;

[0025] Figure 10 It is a schematic diagram of the light transmission path in the lighting module in the fourth embodiment of the present utility model;

[0026] Figure 11 It is an effect diagram of the light spot formed by the lighting module in the fourth embodiment of the present utility model;

[0027] Figure 12 It is a schematic diagram of the light transmission path in the lighting module in the fifth embodiment of the present utility model.

[0028] In the drawings, each reference numeral represents: 1, light source; 2, lens module; 20, cavity; 21, bottom surface; 22, total reflection surface; 23, microstructure surface; 201, TIR lens; 202, microstructure array lens. Detailed implementation manners

[0029] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present utility model and should not be construed as a limitation of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0030] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined.

[0032] Please refer to Figures 1 - 12 , an illumination module is provided in an embodiment of the present utility model, including: a light source 1 and a lens module 2. The lens module 2 includes a bottom surface 21, a total reflection surface 22, and a microstructure surface 23. The optical axis of the light source 1 is located on the central axis of the lens module 2. The bottom surface 21 and the microstructure surface 23 are oppositely arranged on both sides of the total reflection surface 22. The lens module 2 is recessed from the side of the bottom surface 21 away from the total reflection surface 22 towards the side close to the total reflection surface 22 to form a cavity 20. The bottom surface 21 surrounds the periphery of the cavity 20. When the light source 1 is arranged outside the cavity 20, the distance between the light-emitting surface of the light source 1 and the bottom surface 21 is 0 - 1 mm. When the light source 1 is arranged inside the cavity 20, the distance between the light-emitting surface of the light source 1 and the bottom surface 21 is 0 - 3 mm. The output light of the light source 1 is reflected by the total reflection surface 22 and then transmitted to the microstructure surface 23. The light-incident aperture of the lens module 2 is 4 - 8 mm, and the light-emitting aperture of the lens module 2 is 30 - 40 mm.

[0033] Specifically, the total reflection surface 22 is connected to the bottom surface 21 and is disposed between the bottom surface 21 and the microstructure surface 23. Let the side of the bottom surface 21 facing away from the total reflection surface 22 be the first side, and the side of the bottom surface 21 connected to the total reflection surface 22 be the second side. Then, the lens module 2 is recessed from the first side to the second side to form a cavity 20. When the light source 1 is disposed outside the cavity 20, that is, when the light source 1 is disposed on the side of the bottom surface 21 facing away from the total reflection surface 22, the distance between the light-emitting surface of the light source 1 and the bottom surface 21 is within 0 - 1 mm, specifically, it can be 0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1 mm, etc.; when the light source 1 is disposed inside the cavity 20, that is, when the light source 1 is disposed on the side of the bottom surface 21 connected to the total reflection surface 22, the distance between the light-emitting surface of the light source 1 and the bottom surface 21 is within 0 - 3 mm, specifically, it can be 0, 0.5, 1, 0.5, 2, 2.5, 3 mm, etc. Additionally, the light-incident aperture of the lens module 2 can be 4, 5, 6, 7, 8 mm, etc., and the light-emitting aperture of the lens module 2 can be 30, 32, 35, 40 mm, etc.

[0034] In the embodiment of the present invention, the optical axis of the light source 1 is located on the central axis of the lens module 2. After the output light rays of the light source 1 are reflected by the total reflection surface 22 into collimated light rays, they are transmitted to the microstructure surface 23. Whether the light source 1 is disposed inside the cavity 20 or outside the cavity 20, since the distance between the light source 1 and the bottom surface 21 is relatively close, and the total reflection surface 22 is connected to the bottom surface 21, and since the light-incident aperture of the lens module 2 is 4 - 8 mm and the light-emitting aperture of the lens module 2 is 30 - 40 mm, therefore, even if the incident angle of the light rays of the light source 1 ranges from 0° to 180°, the total reflection surface 22 can gather most of the light rays diverged by the light source 1 and reflect all the light rays. Thus, the full-angle light rays of the light source 1 can be fully utilized, the energy utilization rate of the light source 1 can be improved, and the energy utilization rate can reach 88%, and the environmental glare pressure can be reduced.

[0035] It can be understood that the light source 1 can be an LED. According to the size and position of the light-emitting surface of different LEDs, the distance between the light-emitting surface of the light source 1 and the bottom surface 21, as well as the light-incident aperture and the light-emitting aperture of the lens module 2 can be adaptively adjusted, so as to improve the energy utilization rate of the light source 1.

[0036] Further, please refer to Figures 3 - 4 , in some embodiments, the lens module 2 includes a TIR (Total Internal Reflection) lens 201. The light-incident surface of the TIR lens 201 is the total reflection surface 22, and the light-emitting surface of the TIR lens 201 is the microstructure surface 23.

[0037] Specifically, the lens module 2 includes a TIR lens 201. The TIR lens 201 includes a bottom surface 21, a light incident surface connected to the bottom surface 21, and a light exit surface connected to the light incident surface. The light incident surface is a total reflection surface 22, and the light exit surface is set as a microstructure surface 23. Similarly, the light source 1 can be disposed inside the cavity 20 or outside the cavity 20. The light source 1 is reflected by the light incident surface of the TIR lens 201 to the light exit surface of the TIR lens 201. That is, after the light source 1 is reflected by the total reflection surface 22 into collimated light, it is transmitted to the microstructure surface 23 and finally transmitted to the outside through the microstructure surface 23. When applied to optical therapy, the light is transmitted to the treatment surface through the microstructure surface 23. The total reflection surface 22 can collect and reflect most of the light diverged by the light source 1, make full use of the full-angle light of the light source 1, improve the energy utilization rate of the light source 1, and further reduce the environmental glare pressure.

[0038] Further, please refer to Figures 1 - 2 and Figures 5 - 12 , in some embodiments, the lens module 2 includes a TIR lens 201 and a microstructure array lens 202. The light incident surface of the TIR lens 201 is a total reflection surface 22, the light exit surface of the microstructure array lens 202 is a microstructure surface 23, and the light exit surface of the TIR lens 201 faces the light incident surface of the microstructure array lens 202.

[0039] Specifically, the lens module 2 includes a TIR lens 201 and a microstructure array lens 202. The TIR lens 201 includes a bottom surface 21, a light incident surface connected to the bottom surface 21, and a light exit surface connected to the light incident surface. The microstructure array lens 202 has a certain thickness. The microstructure array lens 202 includes a light incident surface and a light exit surface arranged oppositely, and the light incident surface of the microstructure array lens 202 faces the light exit surface of the TIR lens 201. The light incident surface of the TIR lens 201 is a total reflection surface 22, and the light exit surface of the microstructure array lens 202 is a microstructure surface 23. Similarly, the light source 1 can be disposed inside the cavity 20 or outside the cavity 20. After the light source 1 is reflected by the total reflection surface 22 of the TIR lens 201 into collimated light, it is transmitted to the light exit surface of the TIR lens 201, then transmitted from the light exit surface of the TIR lens 201 to the light incident surface of the microstructure array lens 202, and then transmitted from the light incident surface of the microstructure array lens 202 to the microstructure surface 23 of the microstructure array lens 202, and finally transmitted to the outside through the microstructure surface 23 of the microstructure array lens 202. When applied to optical therapy, the light is transmitted to the treatment surface through the microstructure surface 23 of the microstructure array lens 202. The total reflection surface 22 of the TIR lens 201 can collect and reflect most of the light diverged by the light source 1, make full use of the full-angle light of the light source 1, improve the energy utilization rate of the light source 1, and further reduce the environmental glare pressure.

[0040] Further, please refer toFigures 1 - 2 and Figures 5 - 12 The distance between the light-emitting surface of the TIR lens 201 and the light-incident surface of the micro-structured array lens 202 is 0 to 30 mm.

[0041] Specifically, the light-emitting surface of the TIR lens 201 faces the light-incident surface of the micro-structured array lens 202, and the distance between the light-emitting surface of the TIR lens 201 and the light-incident surface of the micro-structured array lens 202 can be 0, 10, 15, 20, 25, 30 mm, etc. The light of the light source 1 passes through the TIR lens 201 and is reflected by the TIR lens 201 into collimated light, and the collimated light passes through the surface structure of the micro-structured array lens 202 and is refracted to form a light spot. By changing the distance between the light-emitting surface of the TIR lens 201 and the light-incident surface of the micro-structured array lens 202, light spots of different sizes can be formed, which can meet the functional requirements of actual medical optical products and have a simple structure.

[0042] Further, please refer to Figures 1 - 2 and Figures 5 - 12 The micro-structured array lens 202 is composed of a plurality of single-lens arrays. The number of single lenses in the horizontal direction of the micro-structured array lens 202 is 6 to 20, and the number of single lenses in the vertical direction of the micro-structured array lens 202 is 5 to 18.

[0043] Specifically, in the horizontal direction of the micro-structured array lens 202, the number of single lenses is 6, 7, 8, 9, 10, 12, 15, 18, 20, etc.; in the vertical direction of the micro-structured array lens 202, the number of single lenses is 5, 6, 7, 8, 9, 10, 12, 15, 18, etc. By changing the number of single lenses in each direction of the micro-structured array lens 202, various micro-structured array lenses 202 can be realized. The higher the number of single lenses, the greater the density of the micro-structured array lens 202. In the embodiment of the utility model, the number of single lenses in the horizontal direction of the micro-structured array lens 202 is 6 to 20, and the number of single lenses in the vertical direction of the micro-structured array lens 202 is 5 to 18, so as to ensure the uniformity of the light spot formed by the micro-structured array lens 202 and at the same time reduce the manufacturing process difficulty of the micro-structured array lens 202.

[0044] Understandably, at different positions in the lateral direction of the microstructured array lens 202, the number of single lenses can be the same or different; at different positions in the longitudinal direction of the microstructured array lens 202, the number of single lenses can also be the same or different. When a number of single lenses are arranged in a circular array; or, a number of single lenses are arranged in a pentagonal array; or, a number of single lenses are arranged in a hexagonal array; etc., the number of single lenses at different positions in the lateral direction of the microstructured array lens 202 is different, and the number of single lenses at different positions in the longitudinal direction of the microstructured array lens 202 is also different. However, when a number of single lenses are arranged in a rectangular array, the number of single lenses at different positions in the lateral direction of the microstructured array lens 202 is the same, and the number of single lenses at different positions in the longitudinal direction of the microstructured array lens 202 is also the same.

[0045] Further, please refer to Figures 1 - 2 and Figures 5 - 12 , the single lens includes a rectangular single lens, the length of the rectangular single lens is 0.6 - 2 mm, and the width of the rectangular single lens is 0.5 - 1.8 mm.

[0046] Specifically, the length of the rectangular single lens can be 0.6, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2 mm, etc., and the width of the rectangular single lens is 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8 mm, etc. Understandably, the length of the rectangle is greater than the width. Exemplarily, when the width of the rectangular single lens is 1.5 mm, the length of the rectangular single lens is greater than 1.5 mm.

[0047] With the continuous improvement of the technical requirements of medical-related products and the continuous development of the medical optics field, more and more medical optical products have the functional requirement of a rectangular light spot, and the required rectangular light spot often has various shapes and sizes. In the related art, a rectangular light spot is mostly formed by using a reflector cup module, and the corresponding light source 1 is a halogen lamp. The shape of the reflector cup is relatively large, and with the change of the requirement of the rectangular light spot, the overall surface shape of the reflector cup will change greatly. And an LED lamp bead is usually paired with an integrating rod lens to form a rectangular light spot. The integrating plate has a large loss of light energy and cannot form a rectangular light spot with a large angle.

[0048] In the embodiment of the present utility model, after the light of the light source 1 passes through the TIR lens 201 and the microstructured array lens 202, a light spot can be formed, and the shape of the single lens can determine the shape of the light spot. Therefore, by adjusting the length and width of the rectangular single lens, light spots of various sizes can be formed, so as to meet the functional requirements of actual medical optical products, and the structure is simple.

[0049] In other embodiments, the shape of the single lens can be circular, hexagonal, pentagonal, and so on.

[0050] Furthermore, the microstructured array lens 202 is parallel to the bottom surface 21; or, the microstructured array lens 202 has a curvature, and the curvature is a first preset value.

[0051] Specifically, the microstructured array lens 202 has a certain thickness. In some embodiments, please refer to Figures 1 - 2 and Figures 5 - 11 , the microstructured array lens 202 can be parallel to the bottom surface 21. In some other embodiments, please refer to Figure 12 , the microstructured array lens 202 can be curved relative to the bottom surface 21, so that the microstructured array lens 202 as a whole has a certain curvature, and the curvature of the microstructured array lens 202 can be set according to actual needs. By changing the overall curvature of the microstructured array lens 202, various light spots of different sizes can also be formed, so as to meet the functional requirements of actual medical optical products.

[0052] Furthermore, please refer to Figures 5 - 11 , the microstructured surface 23 is composed of a plurality of single microstructured surface arrays, and the surface curvature of the single microstructured surface is a second preset value.

[0053] Specifically, as Figures 5 - 6 shown, when the surface curvature of the single microstructured surface is small, the angle of the light emitted through the microstructured surface 23 is not large. As can be seen from the display in Figure 7 , the formed light spot is small. As the surface curvature of the single microstructured surface increases, the angle of the light emitted through the microstructured surface 23 increases, and the formed light spot becomes larger and larger. For example, the surface curvature of the single microstructured surface in Figure 10 is larger than that of the single microstructured surface in Figure 8 , and the light spot shown in Figure 11 is larger than the light spot shown in Figure 9 . In actual practice, by changing the surface curvature of the single microstructured surface, various light spots of different sizes can be formed.

[0054] In some embodiments, the lens module 2 includes a TIR lens 201 and a microstructured array lens 202. Among them, the total internal reflection surface 22 is disposed on the TIR lens 201, and the microstructured surface 23 is disposed on the microstructured array lens 202. The microstructured array lens 202 is formed by a plurality of single lens arrays, the single microstructured surface is disposed on the single lens, and the microstructured surface 23 is formed by a plurality of single microstructured surface arrays.

[0055] In some embodiments, the lens module 2 includes a TIR lens 201, and a total reflection surface 22 and a microstructure surface 23 are connected to form an integral body. That is, in this embodiment, the light-emitting surface of the TIR lens 201 is equivalent to the light-emitting surface of the microstructure array lens 202 in the above embodiment. Similarly, the microstructure surface 23 can be formed by arranging a plurality of single microstructure surfaces in an array.

[0056] Further, the angle between the light passing through the microstructure surface 23 and the normal line is 5° to 40°. Specifically, the angles between the light passing through the microstructure surface 23 and the normal line are 5°, 10°, 15°, 20°, 25°, 30°, 35°, 40°, etc. Therefore, the size of the light spot formed by refraction through the microstructure surface 23 can be defined.

[0057] Further, please refer to Figures 1 - 12 , the microstructure surface 23 is circular, and the radius of the microstructure surface 23 is 8 to 25 mm. Specifically, the radius of the microstructure surface 23 can be 8, 9, 10, 15, 20, 25 mm, etc. In practical applications, for example, when the lighting module is applied to optical therapy, the size of the microstructure surface 23 can be determined according to the size of the treatment surface.

[0058] In some embodiments, the lens module 2 includes a TIR lens 201 and a microstructure array lens 202, wherein the microstructure surface 23 is disposed on the microstructure array lens 202. The microstructure array lens 202 is formed by arranging a plurality of single lenses in a circular array, so that the microstructure surface 23 is circular.

[0059] In some embodiments, the lens module 2 includes a TIR lens 201, and a total reflection surface 22 and a microstructure surface 23 are connected to form an integral body. A plurality of single microstructure surfaces are arranged in a circular array to form the microstructure surface 23, so that the microstructure surface 23 is circular.

[0060] In the above embodiments, the descriptions of the respective embodiments have their own focuses. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0061] The above is the description of the technical solution provided by the present invention. For those skilled in the art, according to the idea of the embodiments of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A lighting module, characterized in that: include: Light source and lens module; The optical axis of the light source is located at the central axis of the lens module; The lens module comprises a bottom surface, a total reflection surface and a microstructure surface; The bottom surface and the microstructure surface are arranged opposite to each other on two sides of the total reflection surface; The lens module is recessed from the side of the bottom surface away from the total reflection surface to the side close to the total reflection surface to form a cavity, and the bottom surface surrounds the periphery of the cavity; When the light source is disposed outside the cavity, the distance between the light emitting surface of the light source and the bottom surface is 0-1 mm; when the light source is disposed inside the cavity, the distance between the light emitting surface of the light source and the bottom surface is 0-3 mm; The output light of the light source is reflected by the total reflection surface and then transmitted to the microstructure surface; The light entrance aperture of the lens module is 4-8 mm, and the light exit aperture of the lens module is 30-40 mm.

2. The lighting module according to claim 1, characterized in that: The lens module includes a TIR lens, the light incident surface of the TIR lens is the total reflection surface, and the light emitting surface of the TIR lens is the microstructure surface.

3. The lighting module according to claim 1, characterized in that: The lens module includes a TIR lens and a microstructure array lens, the light incident surface of the TIR lens is the total reflection surface, the light emitting surface of the microstructure array lens is the microstructure surface, and the light emitting surface of the TIR lens faces the light incident surface of the microstructure array lens.

4. The lighting module according to claim 3, characterized in that: The distance between the light emitting surface of the TIR lens and the light incident surface of the microstructure array lens is 0 to 30 mm.

5. The lighting module according to claim 3, characterized in that: The microstructure array lens is composed of a plurality of single lens arrays. The number of single lenses in the transverse direction of the microstructure array lens is 6 to 20, and the number of single lenses in the longitudinal direction of the microstructure array lens is 5 to 18.

6. The lighting module according to claim 5, characterized in that: The single lens comprises a rectangular single lens, the length of the rectangular single lens is 0.6-2 mm, and the width of the rectangular single lens is 0.5-1.8 mm.

7. The lighting module according to claim 3, characterized in that: The microstructure array lens is parallel to the bottom surface; or, the microstructure array lens has a curvature, and the curvature is a first preset value.

8. The lighting module according to claim 1, characterized in that: The angle between the light passing through the microstructure surface and the normal line is 5° to 40°.

9. The lighting module according to claim 1, characterized in that: The microstructure surface is circular, and the radius of the microstructure surface is 8 to 25 mm.

10. The lighting module according to claim 1, characterized in that: The microstructure surface is composed of a plurality of single microstructure surface arrays, and the surface curvature of the single microstructure surface is a second preset value.

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