LED lens and luminaire

Abstract

The application discloses an LED lens, which comprises a rotary body, an incident area and an emission area are arranged on the rotary body, an outer side wall surface between the emission area and the incident area forms a reflection area, the incident area is provided with a groove, a top wall of the groove forms a first incident surface, a side wall of the groove close to a light source forms a second incident surface, a side wall of the groove far from the light source forms a third incident surface, a region close to the light source of the reflection area forms a first reflection surface, a region far from the light source of the reflection area forms a second reflection surface, the emission area comprises a first emission surface, a second emission surface and a third emission surface, the first incident surface and / or the first emission surface is a compound eye surface formed by a plurality of third convex units, the second incident surface, and / or the first reflection surface, and / or the second emission surface comprises a plurality of first convex units arranged along a radial direction, and the third incident surface, and / or the second reflection surface, and / or the third emission surface comprises a plurality of second convex units arranged along a circumferential direction.

Description

TECHNICAL FIELD

[0001] The present application relates to a lens, in particular to an LED lens and a lamp. BACKGROUND

[0002] Light emitting diode (LED) has the characteristics of power saving, lightness and long life, and the semiconductor lighting product using LED is the common environmental protection and energy saving product. At present, the packaging structure of the semiconductor lighting product is to cover the fluorescent powder on the surface of the LED chip, to excite the fluorescent powder to emit light by the monochromatic light emitted by the LED chip, to mix the monochromatic light not absorbed by the fluorescent powder to generate white light, and to cover the lens to improve the light emitting efficiency of the LED. However, due to the packaging characteristics of the LED lighting product, there is inevitably a problem that the color temperature at the LED chip is high and the color temperature at the fluorescent powder is low, that is, the color temperature difference is caused by the packaging characteristics of the LED lighting product, especially the color temperature difference is more obvious in the near field. SUMMARY

[0003] The present application aims at the problem that the color temperature difference is caused by the packaging characteristics of the LED lighting product, especially the color temperature difference is more obvious in the near field, and provides an LED lens and a lamp.

[0004] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is:

[0005] An LED lens, comprising a rotating body, an incident area and an emission area are arranged on the rotating body, an outer side wall surface between the emission area and the incident area forms a reflection area, the incident area is provided with a groove for placing a light source, characterized in that a top wall of the groove constitutes a first incident surface, a side wall of the groove close to the light source constitutes a second incident surface, a side wall of the groove away from the light source constitutes a third incident surface, a region close to the light source of the reflection area constitutes a first reflection surface, a region away from the light source of the reflection area constitutes a second reflection surface, a rotation radius of the second reflection surface is greater than a rotation radius of the first reflection surface, the emission area comprises a first emission surface, a second emission surface and a third emission surface, the second emission surface surrounds the first emission surface, the third emission surface surrounds the second emission surface,

[0006] The first incident surface and / or the first emission surface comprises a compound eye surface formed by a plurality of third protruding units, the third protruding units have an arc in the circumferential direction and the radial direction of the rotating body;

[0007] The second incidence surface, and / or the first reflection surface, and / or the second emission surface comprises a plurality of first convex units arranged along the radial direction of the rotation body, each of the first convex units has an arc in the circumferential direction of the rotation body.

[0008] The third incidence surface, and / or the second reflection surface, and / or the third emission surface comprises a plurality of second convex units arranged along the circumferential direction of the rotation body, each of the second convex units has an arc in the radial direction of the rotation body.

[0009] The principle of the present application is:

[0010] The first part of light emitted by the light source is emitted via the first incidence surface and the first emission surface, this part of light has a relatively large expansion in the circumferential and radial directions due to the relatively close distance from the light source and the absence of reflection by the reflection surface, therefore, a compound eye surface formed by a plurality of third convex units needs to be arranged on the first incidence surface and / or the first emission surface, and the third convex units have arcs in the circumferential and radial directions of the rotation body, the third convex units mix the light in the circumferential and radial directions to reduce the color temperature difference.

[0011] The second part of light emitted by the light source is emitted via the second incidence surface, the first reflection surface, and the second emission surface, this part of light has a relatively large expansion in the circumferential direction due to the relatively close distance from the light source and the reflection by the reflection surface, but has a relatively small expansion in the radial direction, therefore, a plurality of first convex units arranged along the radial direction of the rotation body need to be arranged on the second incidence surface, and / or the first reflection surface, and / or the second emission surface, each of the first convex units has an arc in the circumferential direction of the rotation body, the first convex units mix the light in the circumferential direction to reduce the color temperature difference.

[0012] The third part of light emitted by the light source is emitted via the third incidence surface, the second reflection surface, and the third emission surface, this part of light has a relatively small expansion in the circumferential direction due to the relatively far distance from the light source and the reflection by the reflection surface, but still has a part of expansion in the radial direction, therefore, a plurality of second convex units arranged along the circumferential direction of the rotation body need to be arranged on the third incidence surface, and / or the second reflection surface, and / or the third emission surface, each of the second convex units has an arc in the radial direction of the rotation body, the second convex units mix the light in the radial direction to reduce the color temperature difference.

[0013] In summary, the present application uses different cylindrical or spherical surfaces on the LED lens surface to mix the light in different directions, which can reduce the color temperature difference and make the color of the light spot more consistent and uniform.

[0014] As a preferred scheme of the present application, the compound eye surface is formed by arraying a plurality of the third convex units.

[0015] As a preferred scheme of the present application, the third convex units are arranged in a ring array, or the third convex units are arranged in a honeycomb array.

[0016] As a preferred scheme of the present application, the compound eye surface is formed by arranging a plurality of the third convex units along a spiral line. With this arrangement, the regularity of each third convex unit is weaker, so that the corresponding light rays are not easily imaged, and the initial defects of the LED light source are not easily presented on the light spot.

[0017] As a preferred scheme of the present application, the spiral line is a Fermat line.

[0018] As a preferred scheme of the present application, the maximum diameter of the exit area along the direction perpendicular to the optical axis of the lens is R, the maximum diameter of the first exit surface along the direction perpendicular to the optical axis of the lens is R1, and the maximum diameter of the second exit surface along the direction perpendicular to the optical axis of the lens is R2, wherein 0.1≤R2-R1 / R-R1≤0.7.

[0019] As a preferred scheme of the present application, the distribution height of the side wall of the groove along the optical axis of the lens is 0 to H, the distribution height of the second incident surface along the optical axis of the lens is 0 to H1, and the distribution height of the third incident surface along the optical axis of the lens is H1 to H, wherein 0.3H≤H1≤0.7H.

[0020] As a preferred scheme of the present application, the distribution height of the reflection area along the optical axis of the lens is 0 to K, the distribution height of the first reflection surface along the optical axis of the lens is 0 to K1, and the distribution height of the second reflection surface along the optical axis of the lens is K1 to K, wherein 0.3K≤K1≤0.7K.

[0021] As a preferred scheme of the present application, the first convex unit and the second convex unit are both cylindrical convex, and the third convex unit is a spherical convex or an aspherical convex.

[0022] As a preferred scheme of the present application, each first convex unit is divided into at least two convex segments along its length direction, and each convex segment has an arc along the radial direction of the rotation body. With this arrangement, the first convex unit is arranged to have arcs in two different directions (circumferential and radial), so that the control of light rays is more precise.

[0023] As a preferred scheme of the present application, all the third convex units cover the first incident surface and / or the first exit surface.

[0024] As a preferred scheme of the present application, all the first convex units cover the second incident surface, and / or the first reflection surface, and / or the second exit surface.

[0025] As a preferred scheme of the present application, all the second convex units cover the third incident surface, and / or the second reflecting surface, and / or the third exit surface.

[0026] As a preferred scheme of the present application, the lowest point of the first exit surface is lower than the lowest point of the second exit surface. In this way, the exit mode of the large-angle light rays that occur interface reflection can be changed, so that the light spot is more uniform, and it is more convenient for production injection.

[0027] As a preferred scheme of the present application, the first exit surface comprises unit surface one and unit surface two, the unit surface two surrounds the unit surface one, and the lowest point of the unit surface one is lower than the highest point of the unit surface two. In this way, the exit mode of the large-angle light rays that occur interface reflection can be changed, so that the light spot is more uniform, and it is more convenient for production injection.

[0028] As a preferred scheme of the present application, the first exit surface comprises unit surface one and unit surface two, the unit surface two surrounds the unit surface one, and the lowest point of the unit surface one is lower than the highest point of the unit surface two, and the lowest point of the unit surface two is lower than the lowest point of the second exit surface. In this way, the exit mode of the large-angle light rays that occur interface reflection can be changed, so that the light spot is more uniform, and it is more convenient for production injection.

[0029] The present application also discloses a lamp comprising any one of the LED lenses.

[0030] In summary, due to the adoption of the above technical scheme, the present application has the following beneficial effects:

[0031] The present application uses different cylindrical or spherical surfaces on the LED lens surface, so that the light rays of the light source realize mixed light in different directions, color temperature difference can be reduced, and the color of the light spot is more consistent and uniform. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a three-dimensional structure schematic diagram of the LED lens of the embodiment 1 of the present application.

[0033] Figure 2 is a top view of the LED lens of the embodiment 1 of the present application.

[0034] Figure 3 is a bottom view of the LED lens of the embodiment 1 of the present application.

[0035] Figure 4 is a front view of the LED lens of the embodiment 1 of the present application.

[0036] Figure 5 is a side view of the LED lens of the embodiment 1 of the present application.

[0037] Figure 6 is Figure 2 A-A sectional view in FIG. 1.

[0038] Figure 7 is Figure 6 a partial enlarged view of the reflection region in FIG. 1.

[0039] Figure 8 is Figure 2 B-B sectional view in FIG. 1.

[0040] Figure 9 is a radial light path diagram of the first part of light rays of the light source described in Embodiment 1 of the present application.

[0041] Figure 10 is a circumferential light path diagram of the first part of light rays of the light source described in Embodiment 1 of the present application.

[0042] Figure 11 is a radial light path diagram of the second part of light rays of the light source described in Embodiment 1 of the present application.

[0043] Figure 12 is a circumferential light path diagram of the second part of light rays of the light source described in Embodiment 1 of the present application.

[0044] Figure 13 is a radial light path diagram of the third part of light rays of the light source described in Embodiment 1 of the present application.

[0045] Figure 14 is a circumferential light path diagram of the third part of light rays of the light source described in Embodiment 1 of the present application.

[0046] Figure 15 is a comparison diagram of color temperature distribution of an LED lens using the present application and a conventional lens.

[0047] Figure 16 is a top view of the LED lens described in Embodiment 2 of the present application.

[0048] Figure 17 is a partial enlarged view of the first convex unit described in Embodiment 2 of the present application.

[0049] Figure 18 is a three-dimensional structure diagram of the LED lens described in Embodiment 3 of the present application.

[0050] Figure 19 is a top view of the LED lens described in Embodiment 3 of the present application.

[0051] Figure 20 is a side view of the LED lens described in Embodiment 3 of the present application.

[0052] Figure 21 is a three-dimensional structure schematic diagram of the LED lens according to Embodiment 4 of the present application.

[0053] Figure 22 is a side view of the LED lens according to Embodiment 4 of the present application.

[0054] Figure 23 is a three-dimensional structure schematic diagram of the LED lens according to Embodiment 5 of the present application. Figure 1 .

[0055] Figure 24 is a three-dimensional structure schematic diagram of the LED lens according to Embodiment 5 of the present application. Figure 2 .

[0056] Figure 25 is a three-dimensional structure schematic diagram of the LED lens according to Embodiment 6 of the present application. Figure 1 .

[0057] Figure 26 is a three-dimensional structure schematic diagram of the LED lens according to Embodiment 6 of the present application. Figure 2 .

[0058] Figure 27 is a three-dimensional structure schematic diagram of the LED lens according to Embodiment 7 of the present application.

[0059] Figure 28 is a sectional view of the LED lens according to Embodiment 7 of the present application.

[0060] Figure 29 is a three-dimensional structure schematic diagram of the LED lens according to Embodiment 8 of the present application.

[0061] Figure 30 is a sectional view of the LED lens according to Embodiment 8 of the present application.

[0062] Figure 31 is a top view of the LED lens according to Embodiment 8 of the present application.

[0063] Figure 32 is a three-dimensional structure schematic diagram of the LED lens according to Embodiment 9 of the present application.

[0064] Figure 33 is a sectional view of the LED lens according to Embodiment 9 of the present application.

[0065] Figure: 1 - incident area, 11 - first incident surface, 12 - second incident surface, 13 - third incident surface, 2 - reflection area, 21 - first reflection surface, 22 - second reflection surface, 3 - exit area, 31 - first exit surface, 311 - unit surface one, 312 - unit surface two, 32 - second exit surface, 33 - third exit surface, 4 - groove, 5 - third convex unit, 6 - first convex unit, 61 - convex section, 7 - second convex unit. DETAILED DESCRIPTION

[0066] The application will be described in further detail below with reference to the drawings.

[0067] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0068] Example 1

[0069] As shown in the figure, an LED lens comprises a rotation body, the rotation body is provided with an incident area 1 and an exit area 3, an outer lateral wall surface between the exit area 3 and the incident area 1 forms a reflection area 2, and the incident area 1 is provided with a groove 4 for placing a light source. Figures 1-8 The top wall of the groove 4 constitutes a first incident surface 11, the side wall of the groove 4 close to the light source constitutes a second incident surface 12, and the side wall of the groove 4 away from the light source constitutes a third incident surface 13. Specifically, the distribution height of the side wall of the groove 4 along the lens optical axis is 0 to H, the distribution height of the second incident surface 12 along the lens optical axis is 0 to H1, and the distribution height of the third incident surface 13 along the lens optical axis is H1 to H, wherein 0.3H≤H1≤0.7H.

[0070] The area close to the light source of the reflection area 2 constitutes a first reflection surface 21, and the area away from the light source of the reflection area 2 constitutes a second reflection surface 22, and the rotation radius of the second reflection surface 22 is greater than that of the first reflection surface 21. Specifically, the distribution height of the reflection area 2 along the lens optical axis is 0 to K, the distribution height of the first reflection surface 21 along the lens optical axis is 0 to K1, and the distribution height of the second reflection surface 22 along the lens optical axis is K1 to K, wherein 0.3K≤K1≤0.8K.

[0071] The area close to the light source of the reflection area 2 constitutes a first reflection surface 21, and the area away from the light source of the reflection area 2 constitutes a second reflection surface 22, and the rotation radius of the second reflection surface 22 is greater than that of the first reflection surface 21. Specifically, the distribution height of the reflection area 2 along the lens optical axis is 0 to K, the distribution height of the first reflection surface 21 along the lens optical axis is 0 to K1, and the distribution height of the second reflection surface 22 along the lens optical axis is K1 to K, wherein 0.3K≤K1≤0.8K.

[0072] The emission region 3 includes a first emission surface 31, a second emission surface 32, and a third emission surface 33. The second emission surface 32 surrounds the first emission surface 31, and the third emission surface 33 surrounds the second emission surface 32. Specifically, the maximum diameter of the emission region 3 along a direction perpendicular to the lens optical axis is R, the maximum diameter of the first emission surface 31 along a direction perpendicular to the lens optical axis is R1, and the maximum diameter of the second emission surface 32 along a direction perpendicular to the lens optical axis is R2, where 0.1≤R2-R1 / R-R1≤0.7.

[0073] The first exit surface 31 includes a compound eye surface formed by a combination of multiple third protrusion units 5, the third protrusion units 5 are spherical protrusions or aspherical protrusions, and the third protrusion units 5 have curvatures in the circumferential and radial directions of the rotating body. The compound eye surface is formed by an array of multiple third protrusion units 5, the third protrusion units 5 are arranged in a ring array, or the third protrusion units 5 are arranged in a honeycomb array, or the third protrusion units 5 are arranged along a spiral line, and the spiral line can be a Fermat spiral, and all the third protrusion units 5 are distributed throughout the first exit surface 31.

[0074] The second emission surface 32 includes a plurality of first protrusion units 6 arranged radially along the rotating body. The first protrusion units 6 are cylindrical protrusions. Each of the first protrusion units 6 has an arc in the circumferential direction of the rotating body, and all the first protrusion units 6 cover the entire second emission surface 32 .

[0075] The third exit surface 33 includes a plurality of second protrusion units 7 arranged circumferentially along the rotating body. The second protrusion units 7 are cylindrical protrusions. Each second protrusion unit 7 has an arc in the radial direction of the rotating body, and all the second protrusion units 7 cover the entire third exit surface 33 .

[0076] like Figures 9-10 As shown, the first portion of light emitted by the light source is emitted after passing through the first incident surface 11 and the first exit surface 31. In this embodiment, a compound eye surface formed by a combination of third protrusion units 5 is provided on the first exit surface 31. After the light enters the compound eye surface, the third protrusion units 5 mix the light in both the circumferential and radial directions of the rotating body, thereby reducing the color temperature difference.

[0077] like Figures 11-12 As shown, the second part of the light emitted by the light source is emitted after passing through the second incident surface 12, the first reflecting surface 21, and the second exit surface 32. In this embodiment, a first protrusion unit 6 arranged along the radial direction of the rotating body is set on the second exit surface 32, and each of the first protrusion units 6 has an arc in the circumferential direction of the rotating body. After the light enters the first protrusion unit 6, the first protrusion unit 6 mixes the light in the circumferential direction of the rotating body to reduce the color temperature difference.

[0078] As Figures 13-14 shown in the figure, the third part of light emitted by the light source is emitted by the third incident surface 13, the second reflecting surface 22 and the third exit surface 33. In this embodiment, the second protruding unit 7 is arranged along the circumference of the rotating body on the third exit surface 33, and each second protruding unit 7 has an arc along the radial direction of the rotating body. The light is mixed in the radial direction of the rotating body through the second protruding unit 7, thereby reducing the color temperature difference.

[0079] Figure 15 In order to simulate the color temperature distribution diagram of a 500*500mm area at a distance of 1m from the lens, it can be seen from the figure that the color temperature distribution of the LED lens of the present application has a smaller difference than that of the conventional lens. Therefore, by using different cylindrical or spherical surfaces on the LED lens, the light rays of the light source can be mixed in different directions, thereby reducing the color temperature difference and making the color of the light spot more uniform.

[0080] Embodiment 2

[0081] As Figures 16-17 shown in the figure, the difference between this embodiment and embodiment 1 is that each first protruding unit 6 is divided into at least two protruding segments 61 along its length direction, and each protruding segment 61 has an arc along the radial direction of the rotating body. That is, each protruding segment 61 not only has an arc along the circumferential direction of the rotating body, but also has an arc along the radial direction of the rotating body, so the control of the light rays is more precise.

[0082] Embodiment 3

[0083] As Figures 18-20 shown in the figure, the difference between this embodiment and embodiment 1 is that the first protruding unit 6 is not arranged on the second exit surface 32, but on the first reflecting surface 21. Similarly, the second part of light emitted by the light source can be mixed.

[0084] Embodiment 4

[0085] As Figures 21-22 shown in the figure, the difference between this embodiment and embodiment 3 is that the first protruding unit 6 is divided into at least two protruding segments 61 along its length direction, and each protruding segment 61 has an arc along the radial direction of the rotating body. That is, each protruding segment 61 not only has an arc along the circumferential direction of the rotating body, but also has an arc along the radial direction of the rotating body, so the control of the light rays is more precise.

[0086] Embodiment 5

[0087] As Figures 23-24 shown in the figure, the difference between this embodiment and embodiment 1 is that the first protruding unit 6 is not arranged on the second exit surface 32, but on the second incident surface 12. Similarly, the second part of light emitted by the light source can be mixed.

[0088] Example 6

[0089] like Figures 25-26 As shown, the difference between this embodiment and Example 5 is that the first protrusion unit 6 is divided into at least two protrusion segments 61 along its length, and each protrusion segment 61 has a curvature along the radial direction of the rotating body. In other words, each protrusion segment 61 has a curvature not only along the circumferential direction of the rotating body, but also along the radial direction of the rotating body, thereby more precisely controlling the light.

[0090] Example 7

[0091] like Figures 27-28 As shown, the difference between this embodiment and embodiment 1 is that the lowest point of the first exit surface 31 is lower than the lowest point of the second exit surface 32 , that is, the first exit surface 31 is designed to be sunken as a whole.

[0092] Example 8

[0093] like Figures 29-31 As shown, the difference between this embodiment and embodiment 1 is that the first exit surface 31 includes a unit surface 1 311 and a unit surface 2 312, the unit surface 2 312 surrounds the unit surface 1 311, and the lowest point of the unit surface 1 311 is lower than the highest point of the unit surface 2 312, that is, the first exit surface 31 is locally sunken.

[0094] Example 9

[0095] like Figures 32-33 As shown, the difference between this embodiment and embodiment 1 is that the first exit surface 31 includes a first unit surface 311 and a second unit surface 312. The second unit surface 312 surrounds the first unit surface 311, and the lowest point of the first unit surface 311 is lower than the highest point of the second unit surface 312, and the lowest point of the second unit surface 312 is lower than the lowest point of the second exit surface 32. In other words, the first exit surface 31 is sunken as a whole, and the sunken design is layered.

[0096] Example 10

[0097] A lamp comprising an LED lens as described in any one of Examples 1-9.

[0098] 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. An LED lens comprising a rotary body, an incident region and an exit region are provided on the rotary body, an outer side wall surface between the exit region and the incident region forms a reflection region, the incident region is provided with a groove for placing a light source, characterized in that, The top wall of the groove constitutes a first incident surface, the side wall of the groove close to the light source constitutes a second incident surface, the side wall of the groove far from the light source constitutes a third incident surface, the reflection area close to the light source constitutes a first reflection surface, the reflection area far from the light source constitutes a second reflection surface, the rotation radius of the second reflection surface is greater than that of the first reflection surface, the exit area includes a first exit surface, a second exit surface and a third exit surface, the second exit surface surrounds the first exit surface, and the third exit surface surrounds the second exit surface, The first incident surface and / or the first exit surface includes a compound eye surface formed by a plurality of third convex units, the third convex unit has an arc in the circumferential direction and the radial direction of the rotation body, and the third convex unit mixes light in the circumferential direction and the radial direction; The second incident surface, and / or the first reflection surface, and / or the second exit surface includes a plurality of first convex units arranged in the radial direction of the rotation body, each first convex unit has an arc in the circumferential direction of the rotation body, and the first convex unit mixes light in the circumferential direction; The third incident surface, and / or the second reflection surface, and / or the third exit surface includes a plurality of second convex units arranged in the circumferential direction of the rotation body, each second convex unit has an arc in the radial direction of the rotation body, and the second convex unit mixes light in the radial direction; The first exit surface includes a unit surface one and a unit surface two, the unit surface two surrounds the unit surface one, and the lowest point of the unit surface one is lower than the highest point of the unit surface two.

2. The LED lens of claim 1, wherein, The compound eye surface is arranged by a plurality of third convex unit arrays.

3. An LED lens according to claim 2, wherein, The third convex unit is arranged in a ring array, or the third convex unit is arranged in a honeycomb array.

4. The LED lens of claim 1, wherein, The compound eye surface is arranged by a plurality of third convex units along a spiral line.

5. An LED lens according to claim 4, wherein, The spiral line is a Fermat spiral.

6. The LED lens of claim 1, wherein, The maximum diameter of the exit area in the direction perpendicular to the lens optical axis is R, the maximum diameter of the first exit surface in the direction perpendicular to the lens optical axis is R1, and the maximum diameter of the second exit surface in the direction perpendicular to the lens optical axis is R2, wherein ≤0.1≤R2-R1 / R-R1≤0.

7.

7. The LED lens of claim 1, wherein, The distribution height of the side wall of the groove along the lens optical axis is 0 to H, the distribution height of the second incident surface along the lens optical axis is 0 to H1, and the distribution height of the third incident surface along the lens optical axis is H1 to H, wherein 0.3 H≤H1≤0.7H.

8. The LED lens of claim 1, wherein, The distribution height of the reflection area along the lens optical axis is 0 to K, the distribution height of the first reflection surface along the lens optical axis is 0 to K1, and the distribution height of the second reflection surface along the lens optical axis is K1 to K, wherein 0.3K ≤K1≤0.7K.

9. A LED lens according to any of claims 1-8, characterized in that The first convex unit and the second convex unit are both cylindrical convex, and the third convex unit is spherical convex or aspherical convex.

10. The LED lens of claim 9, wherein, Each first convex unit is divided into at least two convex segments along its length direction, and each convex segment has an arc in the radial direction of the rotation body.

11. A LED lens according to any one of claims 1-8, characterized in that The lowest point of the first exit surface is lower than the lowest point of the second exit surface.

12. The LED lens of claim 11, wherein, The lowest point of the unit face two is lower than the lowest point of the second exit face.

13. A luminaire characterized by An LED lens comprising a lens as claimed in any of claims 1-12.

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