A uniformly emitting LED optical system and a luminaire

Abstract

The application discloses a LED optical system and a lamp with uniform light emission. The LED optical system comprises a reflecting cup and a lens. The lens is fixed on the light emitting side of the reflecting cup. The lens is provided with an incident surface and an emitting surface. The incident surface is located on the side close to the reflecting cup, and the emitting surface is located on the side away from the reflecting cup. A central incident hole is formed in the middle of the bottom surface of the reflecting cup. Assuming that a cross section of the central incident hole divides the reflecting cup into two symmetrical parts, in the cross section, the cross section curve l1 of the side wall of the reflecting cup is a straight line, or the cross section curve l1 of the side wall is a reverse arc. Two end points of the cross section curve l1 are A point and B point. The length of the straight line l2 connected by A point and B point is L. The straight line l2 is located on the outside of the reflecting cup. The cross section curve l1 intersects with the straight line l2 only at A point and B point. The vertical maximum distance between the cross section curve l1 and the straight line l2 is H, and 0<=H / L<=0.035. The light energy distribution is close to uniform by light control of the reflecting cup and then light control of the lens.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of lighting, in particular to a LED optical system and a lamp with uniform light emission. BACKGROUND

[0002] In the field of LED spotlight, the existing solutions are full reflection lens or reflector cup, and each has its own advantages and disadvantages.

[0003] As shown in Figures 1-2 , the light of the full reflection lens enters from the light entrance surfaces A and B, and exits from the C surface, which will produce multiple interface reflections in different directions, causing stray light, as shown in Figure 3 , the surface illuminance distribution of the conventional full reflection lens is not uniform, and there is a clear bright-dark boundary, with the center being brighter.

[0004] As shown in Figures 4-5 , the reflector cup has a large light spot due to uncontrolled central light, and the light energy concentration is not high, and in order to effectively control the light, the height of the reflector cup is designed to be higher than the lens, which has higher requirements for assembly.

[0005] Therefore, the current use of full reflection lens or reflector cup alone does not achieve good uniform light emission effect, and it is necessary to improve the existing optical system to improve the uniformity of the emitted light. SUMMARY

[0006] The purpose of the present application is to solve the problem that the current use of full reflection lens or reflector cup alone does not achieve good uniform light emission effect, and to provide a LED optical system and a lamp with uniform light emission.

[0007] In order to achieve the above purpose, the technical scheme adopted by the present application is:

[0008] A LED optical system with uniform light emission, comprising a reflector cup and a lens, the lens is fixed on the light exit side of the reflector cup, the lens is provided with a light entrance surface and a light exit surface, the light entrance surface is located on the side close to the reflector cup, the light exit surface is located on the side away from the reflector cup, a central entrance hole is formed in the middle of the bottom surface of the reflector cup,

[0009] Suppose a cross section passing through the central entrance hole divides the reflector cup into two symmetrical parts, then in the cross-sectional view, the cross-sectional curve l1 of the side wall of the reflector cup is a straight line,

[0010] Or,

[0011] The profile curve l1 of the side wall is a reverse arc, two end points of the profile curve l1 are A point and B point, the length of a straight line l2 connecting the A point and the B point is L, the straight line l2 is located outside the light cup, the profile curve l1 intersects with the straight line l2 only at the A point and the B point, the maximum vertical distance between the profile curve l1 and the straight line l2 is H, and 0≤H / L≤0.035.

[0012] Preferably, the light-incident surface is provided with a beaded microstructure.

[0013] Preferably, the beaded microstructure is a square microstructure or a hexagonal microstructure.

[0014] Preferably, the light-incident surface is a square surface or a circular surface in the projection of the light cup.

[0015] Preferably, the light-incident surface and / or the light-emitting surface is provided with a broadband anti-reflection film.

[0016] Preferably, the lens further comprises a polarizing optical sheet or a uniform light optical sheet, the polarizing optical sheet or the uniform light optical sheet is arranged on the light-emitting side of the lens and is spaced apart from the lens.

[0017] Preferably, the polarizing optical sheet is a single-polarizing optical sheet or a double-polarizing optical sheet.

[0018] Preferably, the single-polarizing optical sheet or the double-polarizing optical sheet further comprises a convex rib or a frosted structure arranged on one side of the film.

[0019] Preferably, the minimum distance between the polarizing optical sheet or the uniform light optical sheet and the lens is less than or equal to 6mm.

[0020] Preferably, the lens comprises multiple specifications, and the lens is assembled and connected with the light cup.

[0021] An LED lamp comprises any one of the optical systems of the linear LED lamp.

[0022] Preferably, the lamp is a linear lamp, and the lamp is provided with multiple optical systems.

[0023] Preferably, the linear lamp has a shape of a strip, a fan or a circle.

[0024] In summary, due to the adoption of the above technical solutions, the present application has the following advantages:

[0025] The LED optical system of uniform light emission of the present application combines the advantages of the traditional reflector cup and lens, by setting a reflector cup and lens combined optical system, first using the reflector cup to control light, and then through the lens to control light, the center uncontrolled light and edge reflected light energy can be overlapped as much as possible through the reflector cup before the light enters the lens, a relatively uniform light spot is obtained on the lens light entrance surface, and since the lens is thick in the center and thin at the edge, the best light spot distribution is that the center is the brightest and then uniformly transitions to the edge, which improves the uniformity of the lens surface and solves the problem of uncontrolled light in the center of the reflector cup.

[0026] The design of the arc reflection can make part of the light energy overlap with the other part of the energy that does not pass through the reflection surface of the reflector cup, so that the light energy of the two parts of light energy can obtain nearly consistent light energy distribution through a lens. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structure diagram of the total reflection lens described in the background art.

[0028] Figure 2 is a light path diagram of the total reflection lens described in the background art.

[0029] Figure 3 is a surface illuminance distribution diagram of the total reflection lens described in the background art.

[0030] Figure 4 is a light path diagram of the reflector cup described in the background art.

[0031] Figure 5 is a surface illuminance distribution diagram of the reflector cup described in the background art.

[0032] Figure 6 is a three-dimensional structure diagram of the LED optical system of uniform light emission of the present application.

[0033] Figure 7 is a sectional view of the LED optical system of uniform light emission of the present application.

[0034] Figure 8 is an illuminance distribution diagram of the LED optical system of uniform light emission of the present application.

[0035] Figure 9 is a sectional view of the LED optical system of the present application.

[0036] Figure 10 is a structure diagram of the side wall of the LED optical system of the present application.

[0037] Figure 11is the light path diagram of the sidewall of the LED optical system described in embodiment 3 of the present application.

[0038] Figure 12 is the sidewall structure diagram when H / L=0.0098.

[0039] Figure 13 is the illumination distribution diagram of the optical system when H / L=0.0098.

[0040] Figure 14 is the sidewall structure diagram when H / L=0.04.

[0041] Figure 15 is the illumination distribution diagram of the optical system when H / L=0.04.

[0042] Figure 16 is the sidewall structure diagram when the straight line l2 is located at the inner side of the reflector cup 1.

[0043] Figure 17 is the illumination distribution diagram of the optical system when the straight line l2 is located at the inner side of the reflector cup 1.

[0044] Figure 18 is the sidewall structure diagram when the cross section curve l1 has three intersection points with the straight line l2.

[0045] Figure 19 is the illumination distribution diagram of the optical system when the cross section curve l1 has three intersection points with the straight line l2.

[0046] Figure 20 is the three-dimensional structure diagram of the lens described in the present application.

[0047] Figure 21 is the cross section diagram of the lens described in the present application.

[0048] Figure 22 is the side view of the lens described in the present application.

[0049] Figure 23 is the simulation light path diagram without setting the bead microstructure.

[0050] Figure 24 is the simulation light path diagram with setting the bead microstructure.

[0051] Figure 25 is the simulation light spot diagram without setting the bead microstructure.

[0052] Figure 26 is the simulation light spot diagram with setting the square microstructure.

[0053] Figure 27 is the simulation light spot diagram with setting the hexagonal microstructure.

[0054] Figure 28 is an analog spot diagram without broadband antireflection treatment of the lens surface.

[0055] Figure 29 is an analog spot diagram with broadband antireflection treatment of the lens surface.

[0056] Figure 30 is a three-dimensional structure diagram with a single polarizing optical sheet.

[0057] Figure 31 is a three-dimensional structure diagram of a single polarizing optical sheet.

[0058] Figure 32 is a cross-sectional view of a single polarizing optical sheet.

[0059] Figure 33 is an optical path diagram of a single polarizing optical sheet.

[0060] Figure 34 is a three-dimensional structure diagram with a double polarizing optical sheet.

[0061] Figure 35 is a three-dimensional structure diagram of a double polarizing optical sheet.

[0062] Figure 36 is a cross-sectional view of a double polarizing optical sheet.

[0063] Figure 37 is an optical path diagram of a double polarizing optical sheet.

[0064] Figure 38 is a three-dimensional structure diagram with a homogenizing optical sheet.

[0065] Figure 39 is a three-dimensional structure diagram of a homogenizing optical sheet.

[0066] Figure 40 is a cross-sectional view of a homogenizing optical sheet.

[0067] Figure 41 is an optical path diagram of a homogenizing optical sheet.

[0068] Figure 42 is a three-dimensional structure diagram of a linear lamp in a bar shape Figure 1 .

[0069] Figure 43 is a three-dimensional structure diagram of a linear lamp in a bar shape Figure 2 .

[0070] Figure 44 is a structure diagram of a lens light entrance surface of a linear lamp in a bar shape.

[0071] Figure 45 is a whole lamp diagram of a linear lamp in a bar shape (hidden part of a heat sink).

[0072] Figure 46 This is a three-dimensional structural diagram of a fan-shaped linear lamp.

[0073] Figure 47 This is a three-dimensional structural diagram of a circular linear lamp.

[0074] icon:

[0075] 1-Reflector cup, 11-Central entrance aperture, 12-Side wall, 2-Lens, 21-Incident surface, 22-Emitting 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-Protruding ridge, 4-Using optical sheet, 41-Protruding ridge microstructure, 5-First connecting structure, 6-Second connecting structure, 7-LED light source, 8-Heat sink. Detailed Implementation

[0076] The present invention will now be described in detail with reference to the accompanying drawings.

[0077] To make the objectives, technical solutions, and advantages of this invention clearer, the 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 merely illustrative and not intended to limit the invention.

[0078] Example 1

[0079] like Figure 6 As shown, a uniformly emitting 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 the lens 2 can be assembled together or integrally formed. Preferably, the lens 2 includes various specifications, so it can be freely assembled with the reflector 1 into different combination structures to adapt to the lighting requirements of different lamps.

[0080] A central entrance hole 11 is provided in the middle of the bottom surface (the side away from the reflector 1) of the reflector 1. The side wall 12 of the reflector 1 is a rotating surface, and the generatrix of the side wall 12 is a straight line. Figure 7 As shown. The lens 2 has an incident light surface 21 and an exit light surface 22. The incident light surface 21 is located on the side closer to the reflector 1, and the exit light surface 22 is located on the side farther away from the reflector 1.

[0081] The uniform light emitting LED optical system described in the embodiment combines the advantages of the traditional reflector cup and lens, and by setting a reflector cup and lens combined optical system, firstly, the light is controlled by the reflector cup, and then the light is controlled by the lens, the central uncontrolled light and the edge reflected light energy can be overlapped as much as possible by the reflector cup before the light enters the lens, a relatively uniform light spot is obtained on the light entrance surface of the lens, and since the lens is thick in the center and thin at the edge, the best distribution of the light spot is that the center is the brightest and then uniformly transitions to the edge, which improves the uniformity of the lens surface and solves the problem of uncontrolled light in the center of the reflector cup.

[0082] As shown in Figure 8 , the uniform light emitting LED optical system described in the embodiment can realize uniform transition of the light on the light entrance surface of the lens, and the uniformity of the overall formed light spot is good.

[0083] Embodiment 2

[0084] The difference between the embodiment and embodiment 1 is that the side wall 12 of the reflector cup 1 in the embodiment includes a plurality of inclined planes, for example, 4, as shown in Figures 42-43 , all the inclined planes form a bent side wall structure. Similarly, the uniform light emitting LED optical system described in the embodiment can also realize uniform transition of the light on the light entrance surface of the lens, and the uniformity of the overall formed light spot is good.

[0085] Embodiment 3

[0086] As shown in Figure 6 , a uniform light emitting LED optical system includes a reflector cup 1 and a lens 2, the lens 2 is fixed on the light exit side of the reflector cup 1, and the reflector cup 1 and the lens 2 can be assembled or integrally formed. The lens 2 is provided with an entrance surface 21 and an exit surface 22, the entrance surface 21 is located on the side close to the reflector cup 1, and the exit surface 22 is located on the side away from the reflector cup 1.

[0087] The bottom surface (the surface away from the reflector cup 1) of the reflector cup 1 is provided with a central incident hole 11, as shown in Figures 9-10 , assuming that a cross section passing through the central point of the central incident hole 11 divides the reflector cup 1 into two symmetrical parts, in the cross-sectional view, the cross-sectional curve l1 of the side wall 12 of the reflector cup 1 is a reverse arc, the two end points of the cross-sectional curve l1 are A point and B point, the straight line l2 connecting the A point and the B point, the length of the straight line l2 is L, the straight line l2 is located on the outside of the reflector cup 1, the cross-sectional curve l1 and the straight line l2 only intersect at the A point and the B point, the maximum vertical distance between the cross-sectional curve l1 and the straight line l2 is H, and 0≤H / L≤0.035.

[0088] As shown in Figure 11 , the design of the arc-shaped side wall 12 of the reflector cup can make the light energy of the part of the light rays after being reflected by the reflector cup coincide with the other part of the light energy which has not been reflected, so that the light energy of the two parts of the light energy can be approximately uniformly distributed by one lens.

[0089] The LED optical system for uniform light emission described in the embodiment combines the advantages of the conventional reflector cup and lens, and by setting an optical system combining the reflector cup and the lens, the light is controlled by the reflector cup first, and then by the lens, so that the central uncontrolled light and the edge reflected light energy can be overlapped as much as possible by the reflector cup before the light enters the lens, a relatively uniform light spot is obtained at the light entrance surface of the lens, and since the lens is thick at the center and thin at the edge, the best distribution of the light spot is that the center is brightest and then the light uniformly transits to the edge, which improves the uniformity of the lens surface and solves the problem of uncontrolled light at the center of the reflector cup.

[0090] As a relatively optimal implementation manner, as shown in Figures 12-13 , when H / L = 0.0098, the LED optical system for uniform light emission described in the embodiment can realize uniform transition of the light on the light entrance surface of the lens, and the uniformity of the formed light spot is good.

[0091] As a comparative example, as shown in Figures 14-15 , when H / L = 0.04, the light entrance surface of the lens is too bright in the middle and too dark at the edge, which is not conducive to the uniform distribution of the energy of the lens, and the uniformity of the formed light spot is poor.

[0092] As a comparative example, as shown in Figures 16-17 , when the straight line l2 is located at the inner side of the reflector cup 1, the light entrance surface of the lens is bright at the edge and dark at the center, which is not conducive to the uniform distribution of the energy of the lens, and the uniformity of the formed light spot is poor.

[0093] As a comparative example, as shown in Figures 18-19 , when the profile curve l1 and the straight line l2 have three intersection points (A point, B point and C point), the light entrance surface of the lens is not uniform, and the uniformity of the formed light spot is poor.

[0094] Embodiment 4

[0095] On the basis of embodiments 1-3, the lens 2 is optimized in the embodiment, and specifically, as shown in Figures 20-22As shown, the lens 2 is provided with a beaded microstructure on the light entrance surface 21. The beaded microstructure is a square microstructure 23 or a hexagonal microstructure 24. Specifically, those skilled in the art can understand that only the square microstructure 23 can be provided on the light entrance surface 21 of the lens 2, or only the hexagonal microstructure 24 can be provided on the light entrance surface 21 of the lens 2, or both the square microstructure 23 and the hexagonal microstructure 24 can be provided on the light entrance surface 21 of the lens 2.

[0096] As shown in FIG. 1, Figure 23 As shown in FIG. 2, the simulation light path diagram is not provided with a beaded microstructure, Figure 24 As shown in FIG. 3, the simulation light path diagram is provided with a beaded microstructure. It can be seen that the beaded microstructure in the lens can make the reflected light and the unreflected light energy more uniform, so as to obtain a more uniform light spot.

[0097] Further, Figure 25 As shown in FIG. 4, the simulation light spot diagram is not provided with a beaded microstructure. It can be seen that in the case that no microstructure is added in the lens, the simulation light spot appears to be layered; Figure 26 As shown in FIG. 5, the simulation light spot diagram is provided with a square microstructure. It can be seen that the square microstructure in the lens can smooth the light spot and make the light spot uniform. Figure 27 As shown in FIG. 6, the simulation light spot diagram is provided with a hexagonal microstructure. It can be seen that the hexagonal microstructure in the lens can smooth the light spot and make the light spot uniform.

[0098] Embodiment 5

[0099] On the basis of embodiments 1-4, the lens 2 is designed and optimized in this embodiment. Specifically, the light entrance surface 21 and / or the light exit surface 22 of the lens 2 is provided with a broadband anti-reflection film.

[0100] The LED light is reflected by the reflecting cup and then concentrated on the lens, and then refracted out of the optical system through the convex lens. The surface of the lens is coated with an anti-reflection film to reduce the interface reflection. The advantages of the reflecting cup and the lens are combined, so that the designed lamp has the following characteristics: 1. uniform surface illuminance, 2. low glare, and 3. concentrated light energy.

[0101] As shown in FIG. 7, Figures 28-29 As shown in FIG. 7, the surface of the lens is treated with a broadband anti-reflection film, which can effectively reduce the light spot caused by the interface reflection, so that the illuminance is more uniform.

[0102] Those skilled in the art can understand that the projection of the light entrance surface 21 on the reflecting cup 1 can be a square surface or a circular surface. The circular surface is a common cross section, which is convenient for processing and manufacturing and has a lower processing cost. The square surface can further increase the light exit area and improve the lighting efficiency.

[0103] Embodiment 6

[0104] On the basis of embodiments 1-5, this embodiment further adds a polarizing optical sheet, which is arranged on the light-emitting side of the lens 2 and is arranged at a distance from the lens 2. The closer the distance between the polarizing optical sheet and the lens 2, the smaller the overall size of the lamp, which is beneficial to saving materials, reducing processing costs, and improving the flexibility of optical system installation. Preferably, the minimum distance between the polarizing optical sheet and the lens 2 is less than or equal to 10 mm. Further preferably, the minimum distance between the polarizing optical sheet and the lens 2 is less than or equal to 6 mm.

[0105] Specifically, as shown in Figures 30-32 , the polarizing optical sheet in this embodiment is a single polarizing optical sheet 31, and the A surface of the single polarizing optical sheet 31 is provided with a Fresnel lens 311, which can realize the deflection of light and refract the light spot with good uniformity out of the lamp. Preferably, the B surface of the single polarizing optical sheet 31 can also be provided with a convex rib or frosted structure to further achieve the effect of uniform light, as shown in Figure 33 .

[0106] The present application can obtain different light distribution effects by only changing the shape or size of the polarizing optical sheet, thereby further meeting the use requirements of different lamps. Therefore, batch production can be realized, further reducing processing costs, and having significant economic benefits.

[0107] Embodiment 7

[0108] As shown in Figures 34-36 , the difference between this embodiment and embodiment 6 is that the polarizing optical sheet in this embodiment is a double polarizing optical sheet 32. One side of the double polarizing optical sheet 32 is provided with a double polarizing microstructure 321, which is a semicircular or conical strip-shaped protrusion. The cross section of the double polarizing microstructure 321 is an axisymmetric structure, and the double polarizing microstructure 321 has two symmetrical light distribution surfaces, thereby realizing the effect of double polarization. Further preferably, the other side of the double polarizing optical sheet 32 is provided with a convex rib 322, and the diameter of the double polarizing microstructure 321 is greater than the diameter of the convex rib 322. The double polarizing microstructure 321 is responsible for polarization, and the convex rib 322 is responsible for uniform light, as shown in Figure 37 .

[0109] Embodiment 8

[0110] On the basis of the embodiments 1-5, this embodiment further adds a uniform light optical sheet 4, which is arranged on the light emitting side of the lens 2 and is arranged in a spaced manner with the lens 2. The closer the distance between the uniform light optical sheet 4 and the lens 2, the smaller the overall size of the lamp, which is beneficial to save materials, reduce processing cost, and improve the flexibility of optical system installation. Preferably, the minimum distance between the uniform light optical sheet 4 and the lens 2 is less than or equal to 10 mm. Further preferably, the minimum distance between the uniform light optical sheet 4 and the lens 2 is less than or equal to 6 mm.

[0111] In this embodiment, as shown in Figures 38-40 , the uniform light optical sheet 4 includes convex rib microstructures 41 arranged on one side or both sides of the film, and the convex rib microstructures 41 are linearly arranged strip-shaped protrusions. The convex rib microstructures 41 can have different radii and sizes to achieve different uniform light effects. Of course, a frosted surface can also be directly arranged on one side to further smooth the light spot, as shown in Figure 41 .

[0112] The present application can obtain different light distribution effects by changing the shape or size of the uniform light optical sheet 4, thereby further meeting the use requirements of different lamps. Therefore, batch production can be realized, further reducing the processing cost and having significant economic benefits.

[0113] Embodiment 9

[0114] As shown in Figures 42-45 , an LED lamp includes an LED linear lamp optical system according to any one of the embodiments 1-8. Specifically, in this embodiment, the lamp is a linear lamp, and the shape of the linear lamp is a long strip. The lamp is provided with a plurality of optical systems, and the LED light source 7 is installed in the center incident hole 11 of the reflector cup 1.

[0115] Further, in order to realize heat dissipation of the lamp and assembly of the reflector cup 1 and the lens 2, the lamp can further be provided with a heat sink 8, and a first connecting structure 5 and a second connecting structure 6. The first connecting structure 5 can realize assembly connection of the reflector cup 1 and the lens 2, for example, the first connecting structure 5 can include buckle connecting members (buckles, clamping grooves, positioning columns, etc.). The second connecting structure 6 can realize assembly connection of the reflector cup 1 and the lamp, for example, the second connecting structure 6 also includes buckle connecting members (buckles, clamping grooves, positioning columns, etc.).

[0116] Embodiment 10

[0117] As shown in Figure 46 , the difference between this embodiment and embodiment 9 is that the shape of the linear lamp in this embodiment is a fan shape (i.e., the axis is an arc).

[0118] Example 11

[0119] As shown in Figure 47 the difference between this embodiment and Example 9 is that the shape of the linear lamp in this embodiment is circular (i.e. the axis is a circle).

[0120] The above only shows the preferred embodiments of the present application and is not used to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An LED optical system for uniform light emission, characterized by, A linear lamp comprises a reflector cup (1) and a lens (2), the lens (2) is fixed on the light emitting side of the reflector cup (1), the lens (2) is provided with an incident surface (21) and an emitting surface (22), the incident surface (21) is located on the side close to the reflector cup (1), the emitting surface (22) is located on the side away from the reflector cup (1), a central incident hole (11) is arranged in the middle of the bottom surface of the reflector cup (1), Assuming a cross-section passing through the central entrance aperture (11) divides the reflector cup (1) into two symmetrical parts, then in the cross-sectional view, the cross-sectional curve of the sidewall (12) of the reflector cup (1) is... l 1 represents a reverse arc, and the cross-sectional curve is... l Let A and B be the two endpoints of 1, and let the straight line connecting points A and B be... l 2. The straight line has a length of L. l 2 is located outside the reflector cup (1), the profile curve l 1 and the straight line l 2. The cross-sectional curves intersect only at points A and B. l 1. Distance from the straight line l The maximum vertical distance between 2 and L is H, and 0 ≤ H / L ≤ 0.035; Further comprising a polarized optical sheet, the polarized optical sheet is a double polarized optical sheet (32), one side of the double polarized optical sheet (32) is provided with a double polarized microstructure (321), the double polarized microstructure (321) is a semicircular or conical strip-shaped protrusion, the cross section of the double polarized microstructure (321) is an axisymmetric structure, the double polarized microstructure (321) has two symmetrical light distribution surfaces, the other side of the double polarized optical sheet (32) is provided with a convex rib strip (322), the diameter of the double polarized microstructure (321) is greater than the diameter of the convex rib strip (322), the double polarized microstructure (321) is responsible for polarization, and the convex rib strip (322) is responsible for uniform light.

2. An evenly illuminated LED optical system according to claim 1, characterized in that The incident surface (21) is provided with a pearl surface microstructure.

3. An evenly illuminated LED optical system according to claim 2, characterized in that The pearl surface microstructure is a square microstructure (23) or a hexagonal microstructure (24).

4. An evenly illuminated LED optical system according to claim 1, wherein, The projection of the incident surface (21) on the reflector cup (1) is a square surface or a circular surface.

5. A uniformly emitting LED optical system according to claim 1, wherein The incident surface (21) and / or the emitting surface (22) is provided with a broadband anti-reflection film.

6. A uniformly emitting LED optical system according to claim 1, characterized in that The minimum distance between the polarized optical sheet and the lens (2) is less than or equal to 6mm.

7. A uniformly emitting LED optical system according to any of claims 1-6, characterized in that The lens (2) comprises multiple specifications, and the lens (2) is assembled and connected with the reflector cup (1).

8. An LED lamp, characterized in that The lamp comprises an optical system of a linear LED lamp as claimed in any one of claims 1-7.

9. The LED lamp of claim 8, wherein, The lamp is provided with a plurality of optical systems.

10. The LED lamp of claim 9, wherein, The linear lamp has a shape of a strip, a fan or a circle. The linear lamp has a shape of a strip, a fan or a circle.

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