LED optical system capable of uniformly emitting light, and lamp

Abstract

An LED optical system capable of uniformly emitting light, and a lamp. The LED optical system comprises a reflective cup (1) and a lens (2), wherein the lens (2) is fixed to a light-emergent side of the reflective cup (1); the lens (2) is provided with a light-incident face (21) and a light-emergent face (22), the light-incident face (21) being located on the side close to the reflective cup (1), and the light-emergent surface (22) being located on the side away from the reflective cup (1); and a central incidence hole (11) is formed in the middle of the bottom face of the reflective cup (1). Assuming that a profile passing through the central incidence hole (11) divides the reflective cup (1) into two symmetrical components, in a profile view, a profile curve l1 of a side wall (12) of the reflective cup (1) is a straight line, or the profile curve l1 of the side wall (12) is an inverse arc; two end points of the profile curve l1 are a point A and a point B, the length of a straight line l2 formed by means of connecting the point A to the point B is L, the straight line l2 is located on the outer side of the reflective cup (1), and the profile curve l1 intersects the straight line l2 only at the point A and the point B; and the maximum vertical distance from the profile curve l1 to the straight line l2 is H, and 0≤H / L≤0.035. Light is controlled by using the reflective cup (1), and is then controlled by means of the lens (2), such that nearly-uniform distribution of light energy can be obtained.

Description

A uniformly luminous LED optical system and lamp

[0001] This application claims priority to the Chinese patent application (application number, 202311016077.3) filed on August 11, 2023. Technical Field

[0002] The present invention relates to the field of lighting, and in particular to a uniformly luminous LED optical system and a lamp. Background Art

[0003] In the field of LED spotlights, the existing solutions are fully reflective lenses or reflective cups. These two light distribution methods each have their own advantages and disadvantages.

[0004] As shown in Figure 1-2, light from a fully reflective lens enters from light-entering surfaces A and B, and exits the lens from surface C. This produces multiple interface reflections in different directions, causing stray light. As shown in Figure 3, the illumination distribution on the surface of a traditional fully reflective lens is uneven, with a clear boundary between light and dark, and the center is brighter.

[0005] As shown in Figure 4-5, the light in the center of the reflector is not controlled, resulting in a larger light spot and low light energy concentration. In order to effectively control the light, the height of the reflector is designed to be higher than the lens, which places high requirements on assembly.

[0006] Therefore, currently, the use of total reflection lenses or reflective cups alone cannot achieve a good uniform lighting effect. It is necessary to improve the existing optical system to improve the uniformity of the emitted light.

[0007] Summary of the Invention

[0008] The purpose of the present invention is to provide a uniformly emitting LED optical system and lamp to address the problem in the prior art that either a fully reflective lens or a reflective cup alone cannot achieve a good uniform emitting effect.

[0009] In order to achieve the above object, the technical solution adopted by the present invention is:

[0010] A uniformly luminous LED optical system includes a reflector and a lens. The lens is fixed to the light-emitting side of the reflector. The lens has a light-entry surface and a light-emitting surface. The light-entry surface is located on the side close to the reflector, and the light-emitting surface is located on the side away from the reflector. A central incident hole is opened in the middle of the bottom surface of the reflector.

[0011] Assuming that a cross section passing through the central incident hole divides the reflective cup into two symmetrical parts, in the cross-sectional view, the cross-sectional curve l1 of the side wall of the reflective cup is a straight line.

[0012] or,

[0013] The cross-sectional curve l1 of the side wall is an inverse arc. The two endpoints of the cross-sectional curve l1 are points A and B. The straight line l2 connecting points A and B has a length of L. The straight line l2 is located outside the reflective cup. The cross-sectional curve l1 and the straight line l2 intersect only at points A and B. The maximum vertical distance between the cross-sectional curve l1 and the straight line l2 is H, and 0≤H / L≤0.035.

[0014] Preferably, the light incident surface is provided with a beaded microstructure.

[0015] Preferably, the bead surface microstructure is a square microstructure or a hexagonal microstructure.

[0016] Preferably, the projection of the light incident surface on the reflective cup is a square surface or a circular surface.

[0017] Preferably, the light incident surface and / or the light emitting surface is provided with a broadband anti-reflection film.

[0018] Preferably, a polarizing optical sheet or a light-uniforming optical sheet is further included, and the polarizing optical sheet or the light-uniforming optical sheet is arranged on the light-emitting side of the lens and spaced apart from the lens.

[0019] Preferably, the polarizing optical sheet is a single polarizing optical sheet or a double polarizing optical sheet.

[0020] Preferably, the single polarizing optical sheet or the dual polarizing optical sheet further includes convex ribs or a frosted structure provided on one side of the film.

[0021] Preferably, the minimum distance between the polarizing optical sheet or the light uniforming optical sheet and the lens is less than or equal to 6 mm.

[0022] Preferably, the lens includes various specifications, and the lens is assembled and connected to the reflective cup.

[0023] An LED lamp comprises any one of the above-mentioned LED linear light optical systems.

[0024] Preferably, the lamp is a linear lamp, and a plurality of the optical systems are provided on the lamp.

[0025] Preferably, the linear lamp is in the shape of a strip, a fan or a circle.

[0026] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0027] The uniformly luminous LED optical system of the present invention combines the advantages of traditional reflectors and lenses. By setting up an optical system combining a reflector and a lens, the reflector is first used to control light, and then the lens is used to control light. The reflector can overlap the energy of uncontrolled light at the center with the energy of reflected light at the edge as much as possible before the light enters the lens, thereby obtaining a relatively uniform light spot on the light entrance surface of the lens. Since the lens is thick at the center and thin at the edges, the optimal distribution of the light spot is that it is brightest at the center and then evenly transitions to the edges, thereby improving the uniformity of the lens surface and solving the problem of uncontrolled light in the center of the reflector.

[0028] The design of the reverse arc can make the light energy of part of the light passing through the reflective surface of the reflector cup almost overlap with the other part of the energy that has not passed through the reflective surface. In this way, the light energy of the two parts of light energy can be distributed in a nearly consistent manner through one lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] FIG1 is a schematic structural diagram of a total reflection lens described in the background art.

[0030] FIG. 2 is a light path diagram of a total reflection lens described in the background art.

[0031] FIG3 is a surface illumination distribution diagram of a total reflection lens described in the background art.

[0032] FIG. 4 is a light path diagram of the reflective cup described in the background art.

[0033] FIG. 5 is a surface illumination distribution diagram of the reflective cup described in the background art.

[0034] FIG6 is a schematic diagram of the three-dimensional structure of the uniformly luminous LED optical system according to the present invention.

[0035] FIG. 7 is a cross-sectional view of the LED optical system for uniform light emission according to the present invention.

[0036] FIG8 is an illuminance distribution diagram of the uniformly luminous LED optical system according to Example 1 of the present invention.

[0037] FIG9 is a cross-sectional view of the LED optical system according to Example 3 of the present invention.

[0038] FIG10 is a schematic structural diagram of the side wall of the LED optical system according to Example 3 of the present invention.

[0039] FIG11 is a light path diagram of the side wall of the LED optical system according to Example 3 of the present invention.

[0040] FIG12 is a schematic diagram of the side wall structure when H / L=0.0098.

[0041] FIG13 is a diagram showing the illumination distribution of the optical system when H / L=0.0098.

[0042] FIG14 is a schematic diagram of the side wall structure when H / L=0.04.

[0043] FIG15 is a diagram showing the illumination distribution of the optical system when H / L=0.04.

[0044] FIG16 is a schematic diagram of the side wall structure when the straight line l2 is located inside the reflective cup 1 .

[0045] FIG17 is an illumination distribution diagram of the optical system when the straight line l2 is located inside the reflective cup 1 .

[0046] FIG18 is a schematic diagram of the side wall structure when the cross-sectional curve l1 and the straight line l2 have three intersection points.

[0047] FIG19 is an illumination distribution diagram of the optical system when the cross-sectional curve l1 and the straight line l2 have three intersection points.

[0048] FIG20 is a schematic diagram of the three-dimensional structure of the lens according to the invention.

[0049] FIG21 is a cross-sectional view of a lens according to the present invention.

[0050] FIG. 22 is a side view of a lens according to the present invention.

[0051] FIG23 is a diagram of a simulated optical path without a beaded surface microstructure.

[0052] FIG24 is a diagram of a simulated optical path with a beaded microstructure.

[0053] FIG25 is a simulated light spot diagram without setting the bead surface microstructure.

[0054] FIG26 is a simulated light spot diagram with a square microstructure.

[0055] FIG27 is a simulated light spot diagram with a hexagonal microstructure.

[0056] FIG28 is a simulated spot diagram without performing broadband anti-reflection treatment on the lens surface.

[0057] FIG29 is a simulated spot diagram of a lens surface subjected to broadband anti-reflection treatment.

[0058] FIG30 is a three-dimensional structural diagram in which a single polarizing optical plate is provided.

[0059] FIG31 is a three-dimensional structural diagram of a single polarizing optical plate.

[0060] FIG32 is a cross-sectional view of a single polarizing optical plate.

[0061] FIG33 is a light path diagram of a single polarizing optical plate.

[0062] FIG34 is a three-dimensional structural diagram of a device with dual polarizing optical sheets.

[0063] FIG35 is a three-dimensional structural diagram of a dual-polarization optical film.

[0064] FIG36 is a cross-sectional view of a dual-polarization optical plate.

[0065] FIG37 is a light path diagram of a dual-polarization optical film.

[0066] FIG38 is a three-dimensional structural diagram of a light-uniform optical sheet.

[0067] FIG39 is a three-dimensional structural diagram of a light-uniform optical sheet.

[0068] FIG40 is a cross-sectional view of a light-uniform optical sheet.

[0069] FIG41 is a light path diagram of a light uniforming optical sheet.

[0070] FIG42 is a first schematic diagram of the three-dimensional structure of a linear strip lamp.

[0071] FIG43 is a second schematic diagram of the three-dimensional structure of a strip-shaped linear lamp.

[0072] FIG44 is a schematic structural diagram of the light-entering surface of the lens of a strip-shaped linear lamp.

[0073] FIG45 is an overall schematic diagram of a linear strip lamp (partial heat sink hidden).

[0074] FIG46 is a schematic diagram of the three-dimensional structure of a fan-shaped linear lamp.

[0075] FIG47 is a schematic diagram of a three-dimensional structure of a circular linear lamp.

[0076] Icon: 1-reflective cup, 11-central incident hole, 12-side wall, 2-lens, 21-light incident surface, 22-light exit surface, 23-square microstructure, 24-hexagonal microstructure, 31-single polarizing optical sheet, 311-Fresnel lens, 32-dual polarizing optical sheet, 321-dual polarizing microstructure, 322-convex rib, 4-uniform optical sheet, 41-convex rib microstructure, 5-first connecting structure, 6-second connecting structure, 7-LED light source, 8-heat sink. DETAILED DESCRIPTION

[0077] The present invention will be described in detail below with reference to the accompanying drawings.

[0078] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0079] Example 1

[0080] As shown in Figure 6, a uniformly luminous LED optical system includes a reflector 1 and a lens 2. The lens 2 is fixed to the light-emitting side of the reflector 1. The reflector 1 and lens 2 can be assembled and connected, or they can be integrally formed. Preferably, the lens 2 comes in a variety of sizes, so that it can be freely assembled with the reflector 1 to form different combined structures to meet the lighting requirements of different lamps.

[0081] The reflector 1 has a central incident aperture 11 at its center on the bottom surface (the side facing away from the reflector 1). The sidewall 12 of the reflector 1 is a surface of revolution, and the generatrix of the sidewall 12 is a straight line, as shown in FIG7 . The lens 2 has a light entrance surface 21 and a light exit surface 22. The light entrance surface 21 is located on the side closest to the reflector 1, and the light exit surface 22 is located on the side facing away from the reflector 1.

[0082] The uniformly luminous LED optical system described in this embodiment combines the advantages of traditional reflectors and lenses. By setting up an optical system combining a reflector and a lens, the reflector is first used to control light, and then the lens is used to control light. The reflector can overlap the energy of uncontrolled light at the center with the energy of reflected light at the edge as much as possible before the light enters the lens, thereby obtaining a relatively uniform light spot on the lens incident surface. Because the lens is thick at the center and thin at the edges, the optimal light spot distribution is brightest at the center and then evenly transitions to the edges, improving the uniformity of the lens surface and solving the problem of uncontrolled light in the center of the reflector.

[0083] As shown in FIG8 , the uniformly luminous LED optical system described in this embodiment can achieve a uniform transition of the illumination of light at the incident surface of the lens, and the uniformity of the overall light spot is good.

[0084] Example 2

[0085] This embodiment differs from Example 1 in that the sidewall 12 of the reflector cup 1 in this embodiment includes several inclined planes, for example, four, as shown in Figures 42-43. All of these inclined planes form a curved sidewall structure. Similarly, the uniformly luminous LED optical system described in this embodiment also achieves a uniform transition of light intensity at the lens incident surface, resulting in a more uniform overall light spot.

[0086] Example 3

[0087] As shown in Figure 6, a uniformly luminous LED optical system includes a reflector 1 and a lens 2. The lens 2 is fixed to the light-emitting side of the reflector 1. The reflector 1 and lens 2 can be assembled and connected, or they can be integrally formed. The lens 2 has a light-entry surface 21 and a light-emitting surface 22. The light-entry surface 21 is located on the side close to the reflector 1, and the light-emitting surface 22 is located on the side away from the reflector 1.

[0088] A central incident hole 11 is defined in the middle of the bottom surface (the side facing away from the reflector 1 ) of the reflector 1 . As shown in FIGS. 9-10 , assuming that a cross section passing through the center point of the central incident hole 11 divides the reflector 1 into two symmetrical components, in the cross-sectional view, a cross-sectional curve l1 of the side wall 12 of the reflector 1 is an inverse arc. The two endpoints of the cross-sectional curve l1 are points A and B, respectively. A straight line l2 connects points A and B. The length of the straight line l2 is L. The straight line l2 is located outside the reflector 1 . The cross-sectional curve l1 intersects the straight line l2 only at points A and B. The maximum perpendicular distance between the cross-sectional curve l1 and the straight line l2 is H, and 0≤H / L≤0.035.

[0089] As shown in FIG11 , the reverse arc design of the side wall 12 of the reflective cup allows the light energy of part of the light passing through the reflective surface of the reflective cup to almost overlap with the energy of the other part that has not passed through the reflective surface. In this way, the light energy of the two parts of light energy can be nearly uniformly distributed through one lens.

[0090] The uniformly luminous LED optical system described in this embodiment combines the advantages of traditional reflectors and lenses. By setting up an optical system combining a reflector and a lens, the reflector is first used to control light, and then the lens is used to control light. The reflector can overlap the energy of uncontrolled light at the center with the energy of reflected light at the edge as much as possible before the light enters the lens, thereby obtaining a relatively uniform light spot on the lens incident surface. Because the lens is thick at the center and thin at the edges, the optimal light spot distribution is brightest at the center and then evenly transitions to the edges, improving the uniformity of the lens surface and solving the problem of uncontrolled light in the center of the reflector.

[0091] As a better implementation method, as shown in Figures 12-13, when H / L = 0.0098, the uniformly luminous LED optical system described in this embodiment can achieve a uniform transition of the illumination of the light on the incident surface of the lens, and the overall uniformity of the light spot is better.

[0092] As a comparative example, as shown in Figures 14-15, when H / L = 0.04, the illumination of the lens incident surface is too bright in the middle and too dark at the edge, which is not conducive to uniform energy distribution of the lens, and the uniformity of the formed light spot is poor.

[0093] As a comparative example, as shown in FIG16-17 , when the straight line l2 is located inside the reflective cup 1 , the illumination of the lens incident surface is bright at the edge and dark at the center, which is not conducive to uniform energy distribution of the lens and the uniformity of the formed light spot is poor.

[0094] As a comparative example, as shown in FIG18-19 , when the cross-sectional curve l1 and the straight line l2 have three intersection points (point A, point B, and point C), the illumination of the incident surface of the lens is uneven, and the uniformity of the formed light spot is poor.

[0095] Example 4

[0096] Based on Examples 1-3, this embodiment optimizes the design of the lens 2. Specifically, as shown in Figures 20-22, a beaded microstructure is added to the light incident surface 21 of the lens 2. The beaded microstructure is a square microstructure 23 or a hexagonal microstructure 24. Specifically, those skilled in the art will appreciate that only the square microstructure 23, only the hexagonal microstructure 24, or both the square microstructure 23 and the hexagonal microstructure 24 can be provided on the light incident surface 21 of the lens 2.

[0097] Figure 23 shows a simulated optical path diagram without a beaded surface microstructure, and Figure 24 shows a simulated optical path diagram with a beaded surface microstructure. It can be seen that the beaded surface microstructure inside the lens can make the energy of reflected light and non-reflected light more evenly combined, thereby obtaining a more uniform light spot.

[0098] Furthermore, FIG25 shows a simulated light spot diagram without a beaded microstructure, from which it can be seen that when no microstructure is added inside the lens, the simulated light spot is stratified; FIG26 shows a simulated light spot diagram with a square microstructure, from which it can be seen that a square microstructure inside the lens can smooth the light spot and make it uniform; FIG27 shows a simulated light spot diagram with a hexagonal microstructure, from which it can be seen that a hexagonal microstructure inside the lens can smooth the light spot and make it uniform.

[0099] Example 5

[0100] On the basis of Examples 1-4, this embodiment optimizes the design of the lens 2. Specifically, the light incident surface 21 and / or the light exit surface 22 of the lens 2 are provided with a broadband antireflection film.

[0101] The LED light is reflected by the reflector cup, concentrated on the lens, and then refracted out of the optical system through the convex lens. The lens surface is coated with an anti-reflection film to reduce interface reflection, which concentrates the advantages of the reflector cup and the lens, and can further make the designed lamp have the following characteristics: 1. Uniform surface illumination 2. Low glare 3. Concentrated light energy.

[0102] As shown in Figures 28-29, performing broadband anti-reflection treatment on the lens surface can effectively reduce the light spots and stray light caused by interface reflection, making the illumination more uniform.

[0103] Those skilled in the art will appreciate that the projection of the light incident surface 21 on the reflective cup 1 can be a square or circular surface. The circular surface is a common cross-section, which is easy to manufacture and has low processing costs, while the square surface can further increase the light output area and improve lighting efficiency.

[0104] Example 6

[0105] Based on Examples 1-5, this embodiment further includes a polarizing optical sheet. The polarizing optical sheet is positioned on the light-emitting side of lens 2 and spaced apart from lens 2. The closer the distance between the polarizing optical sheet and lens 2, the better. This reduces the overall size of the lamp, which helps save materials, reduces processing costs, and improves the flexibility of optical system installation. Preferably, the minimum distance between the polarizing optical sheet and lens 2 is less than or equal to 10 mm. Further preferably, the minimum distance between the polarizing optical sheet and lens 2 is less than or equal to 6 mm.

[0106] Specifically, as shown in Figures 30-32, the polarizing optical sheet in this embodiment is a single polarizing optical sheet 31. Surface A of the single polarizing optical sheet 31 is provided with a Fresnel lens 311. The Fresnel lens 311 can deflect light, thereby refracting a uniform light spot out of the lamp. Preferably, surface B of the single polarizing optical sheet 31 can also be provided with ridges or a frosted structure to further achieve a uniform light effect, as shown in Figure 33.

[0107] The present invention can achieve different light distribution effects simply by changing the shape or size of the polarizing optical sheet, thereby further meeting the usage requirements of different lamps. Therefore, it can achieve mass production, further reduce processing costs, and have significant economic benefits.

[0108] Example 7

[0109] As shown in Figures 34-36, the difference between this embodiment and Example 6 is that the polarizing optical sheet in this embodiment is a dual-polarizing optical sheet 32. A dual-polarizing microstructure 321 is provided on one side of the dual-polarizing optical sheet 32. The dual-polarizing microstructure 321 is a semicircular or conical strip-shaped protrusion. The cross-section of the dual-polarizing microstructure 321 is an axisymmetric structure, and the dual-polarizing microstructure 321 has two symmetrical light distribution surfaces, thereby achieving a dual-polarization effect. Further preferably, a rib 322 is provided on the other side of the dual-polarizing optical sheet 32. The diameter of the dual-polarizing microstructure 321 is larger than the diameter of the rib 322. The dual-polarizing microstructure 321 is responsible for polarization, while the rib 322 is responsible for light uniformity, as shown in Figure 37.

[0110] Example 8

[0111] Based on Examples 1-5, this embodiment further includes a light-uniforming optical sheet 4, which is disposed on the light-emitting side of the lens 2 and spaced apart from the lens 2. The closer the distance between the light-uniforming optical sheet 4 and the lens 2, the better. The closer the distance between the two, the smaller the overall size of the lamp, which is more conducive to saving materials, reducing processing costs, and improving the flexibility of optical system installation. Preferably, the minimum distance between the light-uniforming optical sheet 4 and the lens 2 is less than or equal to 10 mm. Further preferably, the minimum distance between the light-uniforming optical sheet 4 and the lens 2 is less than or equal to 6 mm.

[0112] In this embodiment, as shown in Figures 38-40 , the light-homogenizing optical sheet 4 includes ridge microstructures 41 disposed on one or both sides of the sheet. These ridge microstructures 41 are linearly arranged strip-shaped protrusions. These ridge microstructures 41 can have varying radii and sizes to achieve different light-homogenizing effects. Alternatively, one side can be frosted to further smooth the light spot, as shown in Figure 41 .

[0113] The present invention can achieve different light distribution effects by simply changing the shape or size of the light-homogenizing optical sheet 4, thereby further meeting the use requirements of different lamps. Therefore, it can achieve mass production, further reduce processing costs, and have significant economic benefits.

[0114] Example 9

[0115] As shown in Figures 42-45 , an LED lamp includes an LED linear light optical system as described in any one of Examples 1-8. Specifically, the lamp in this embodiment is a linear lamp in an elongated strip shape. The lamp is equipped with multiple optical systems, and the LED light source 7 is mounted in the central incident hole 11 of the reflector cup 1.

[0116] Furthermore, in order to achieve heat dissipation of the lamp and assembly of the reflector cup 1 and the lens 2, the lamp can usually be provided with a heat sink 8, and a first connecting structure 5 and a second connecting structure 6 are set. The first connecting structure 5 can achieve the assembly connection between the reflector cup 1 and the lens 2. For example, the first connecting structure 5 can include a snap-fit ​​connection component (snake, slot, positioning column, etc.); the second connecting structure 6 can achieve the assembly connection between the reflector cup 1 and the lamp. For example, the second connecting structure 6 also includes a snap-fit ​​connection component (snake, slot, positioning column, etc.).

[0117] Example 10

[0118] As shown in FIG. 46 , the difference between this embodiment and embodiment 9 is that the linear lamp in this embodiment is fan-shaped (ie, its axis is an arc).

[0119] Example 11

[0120] As shown in FIG. 47 , the difference between this embodiment and embodiment 9 is that the linear lamp in this embodiment is circular in shape (ie, its axis is a circle).

[0121] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A uniformly luminous LED optical system, characterized in that: The invention comprises a reflector cup (1) and a lens (2), wherein the lens (2) is fixed to the light-emitting side of the reflector cup (1), the lens (2) is provided with a light-entering surface (21) and a light-emitting surface (22), the light-entering surface (21) is located on a side close to the reflector cup (1), and the light-emitting surface (22) is located on a side away from the reflector cup (1), and a central incident hole (11) is provided in the middle of the bottom surface of the reflector cup (1). Assuming that a section passing through the central incident hole (11) divides the reflective cup (1) into two symmetrical parts, in the cross-sectional view, the cross-sectional curve l1 of the side wall (12) of the reflective cup (1) is a straight line. or, The cross-sectional curve l1 of the side wall (12) is an inverse arc, the two end points of the cross-sectional curve l1 are point A and point B, the length of the straight line l2 formed by the point A and point B is L, the straight line l2 is located outside the reflective cup (1), the cross-sectional curve l1 and the straight line l2 intersect only at the point A and point B, the maximum vertical distance between the cross-sectional curve l1 and the straight line l2 is H, and 0≤H / L≤0.

035.

2. The uniform light emitting LED optical system according to claim 1, characterized in that: The light incident surface (21) is provided with a bead surface microstructure.

3. The uniform light emitting LED optical system according to claim 2, characterized in that: The bead surface microstructure is a square microstructure (23) or a hexagonal microstructure (24).

4. The uniform light emitting LED optical system according to claim 1, characterized in that: The projection of the light incident surface (21) on the reflective cup (1) is a square surface or a circular surface.

5. The LED optical system for uniform light emission according to claim 1, characterized in that: The light incident surface (21) and / or the light exiting surface (22) are provided with a broadband anti-reflection film.

6. The uniform light emitting LED optical system according to claim 1, characterized in that: It also comprises a polarizing optical sheet or a light-homogenizing optical sheet (4), wherein the polarizing optical sheet or the light-homogenizing optical sheet (4) is arranged on the light-emitting side of the lens (2) and is spaced apart from the lens (2).

7. The uniform light emitting LED optical system according to claim 6, characterized in that: The polarizing optical sheet is a single polarizing optical sheet (31) or a double polarizing optical sheet (32).

8. The uniform light emitting LED optical system according to claim 7, characterized in that: The single polarizing optical sheet (31) or the dual polarizing optical sheet (32) further comprises a convex ridge strip or a frosted structure arranged on one side of the film.

9. The uniform light emitting LED optical system according to claim 6, characterized in that: The minimum distance between the polarizing optical sheet or the light-homogenizing optical sheet (4) and the lens (2) is less than or equal to 6 mm.

10. A uniformly emitting LED optical system according to any one of claims 1 to 9, characterized in that: The lens (2) includes various specifications, and the lens (2) is assembled and connected to the reflective cup (1).

11. An LED lamp, characterized in that: It comprises an LED linear light optical system as described in any one of claims 1-10.

12. The LED lamp according to claim 11, characterized in that: The lamp is a linear lamp, and a plurality of the optical systems are arranged on the lamp.

13. The LED lamp according to claim 12, characterized in that: The linear lamp is in the shape of a bar, a fan or a circle.

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