CN116146934A

CN116146934A - Lens and lamp with same

Info

Publication number: CN116146934A
Application number: CN202211687115.3A
Authority: CN
Inventors: 关天明
Original assignee: Guangzhou Yuliang Photoelectric Technology Co ltd
Current assignee: Guangzhou Yuliang Photoelectric Technology Co ltd
Priority date: 2022-12-27
Filing date: 2022-12-27
Publication date: 2023-05-23

Abstract

The invention discloses a lens and a lamp with the lens, wherein the lens comprises a first surface and a second surface which are oppositely arranged, the middle part of the first surface is recessed towards the second surface to form a light inlet cavity, the cavity wall surface of the light inlet cavity is used for being arranged corresponding to a lamp bead so as to be configured to reflect light rays emitted by the lamp bead to be diffused in the direction deviating from an optical axis, and the second surface is used for refracting part of the light rays refracted by the light inlet surface to the outside of the lens so as to diffuse the light rays in the direction deviating from the optical axis. The first surface is provided with an annular area, the annular area is annularly arranged on the periphery of the light incident surface, the annular area is provided with a plurality of conical grooves which are sunken towards the second surface, and the second surface is also used for reflecting part of light rays refracted by the light incident surface towards the annular area, so that each groove surface of the plurality of conical grooves reflects the light rays reflected by the second surface towards different positions of the second surface. The lens can realize large-angle light emission, and can improve the light utilization rate and make the light emission more uniform.

Description

Lens and lamp with same

Technical Field

The invention relates to the technical field of illumination, in particular to a lens and a lamp with the lens.

Background

In the existing lamp, a lens is generally arranged on the light emitting side of the lamp bead so as to adjust the visual effect of light rays emitted by the lamp bead or the light path of the light rays. However, the lens in the related art has weak effect of adjusting the light emitting angle, is difficult to realize light emitting at a large angle, has limited utilization rate of light emitted by the lamp beads, and is still not uniform enough.

Disclosure of Invention

The embodiment of the invention discloses a lens and a lamp with the lens, which can realize large-angle light emission, improve the light utilization rate and ensure that the emitted light is more uniform.

To achieve the above object, in a first aspect, the present invention discloses a lens, the lens being applied to a lamp, the lamp including a lamp bead, the lens comprising:

the light incident device comprises a first surface and a second surface which are oppositely arranged, wherein the middle part of the first surface is recessed towards the second surface to form a light incident cavity, the cavity wall surface of the light incident cavity is used for being arranged corresponding to the lamp beads and is configured to refract light rays emitted by the lamp beads so as to enable the light rays to diverge towards a direction deviating from an optical axis, and the second surface is used for refracting part of the light rays refracted by the light incident surface out of the lens so as to enable the light rays to diverge towards the direction deviating from the optical axis;

the first surface is provided with an annular area, the annular area is annularly arranged on the periphery of the light incident surface, the annular area is provided with a plurality of conical grooves which are sunken towards the second surface, and the second surface is also used for reflecting part of light rays refracted by the light incident surface towards the annular area so that each groove surface of the plurality of conical grooves reflects the light rays reflected by the second surface towards different positions of the second surface.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the tapered groove is a rectangular pyramid groove, and a plurality of the tapered grooves are arrayed along the first direction and the second direction;

the first direction, the second direction and the optical axis direction are perpendicular to each other.

As an alternative embodiment, in an embodiment of the first aspect of the present invention, a projection of the apex of the conical groove on the first surface is located at a center of a notch of the conical groove.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, a protruding portion is provided at a middle portion of the first surface, the annular region is disposed around an outer periphery of the protruding portion, the protruding portion is provided with a limiting groove, the limiting groove penetrates through the protruding portion and is communicated with the light incident cavity, and the limiting groove is located around the outer periphery of the light incident cavity;

along the optical axis direction, the depth of the limit groove is equal to the height of the lamp bead, and the limit groove is used for clamping the lamp bead, so that the focus of the light incident surface coincides with the center of the light emergent surface of the lamp bead.

In an alternative embodiment, in an embodiment of the first aspect of the present invention, the protruding portion is further provided with one or more heat dissipation grooves, the heat dissipation grooves are located at the periphery of the limit groove, and the heat dissipation grooves are communicated with the limit groove.

In an embodiment of the first aspect of the present invention, the second surface includes a middle area and a peripheral area located at an outer periphery of the middle area, the peripheral area protrudes toward a side facing away from the light incident surface, the middle area is concave toward the light incident surface, and the middle area is concave at a paraxial region, and the middle area and the peripheral area are in smooth transition through a convex surface, so that the second surface refracts a portion of the light refracted by the light incident surface out of the lens, and the light diverges in a direction facing away from the optical axis.

In an alternative embodiment, in the embodiment of the first aspect of the present invention, the radius of curvature of the light incident surface at the paraxial region is R1, and the radius of curvature of the middle region at the paraxial region is R2, 1+.r 2/r1+.6.5.

In a second aspect, the invention discloses a lamp, which comprises a lamp panel, a plurality of lamp beads and a plurality of lenses according to the first aspect, wherein the lamp beads are mutually distributed at intervals on one side of the lamp panel, and the lenses are correspondingly positioned on the light emitting sides of the lamp beads and are connected with the lamp panel.

In an alternative embodiment, in an embodiment of the second aspect of the present invention, the light panel is a circular light panel, and the distance between two adjacent lenses gradually decreases along the direction from the center to the periphery of the light panel.

As an alternative embodiment, in an embodiment of the second aspect of the present invention, a reflective layer is disposed on a side of the lamp panel facing the lens.

Compared with the prior art, the invention has the beneficial effects that:

according to the lens and the lamp with the lens, the light incident surface formed by the cavity wall surface of the light incident cavity is recessed towards the second surface, so that light rays emitted by the lamp beads can be dispersed in the direction deviating from the optical axis of the lens at a certain angle after entering the lens from the light incident surface, the light rays are transmitted to the second surface, and part of the light rays transmitted by the light incident surface can be refracted and dispersed outwards of the lens by the second surface, so that part of the light rays of the lamp beads can be transmitted in the direction forming a large angle with the optical axis, and the beam angle of the lamp can be increased.

In addition, the second surface can reflect part of light transmitted by the light incident surface towards the annular area of the first surface, at the moment, each groove surface of the plurality of conical grooves in the annular area can reflect the part of light, so that the part of light is transmitted towards the second surface again, and is emitted to the outside of the lens from the second surface, thereby improving the utilization rate of the light and ensuring the light efficiency of the lamp. And because each groove face of the conical groove faces different positions of the second face, the plurality of conical grooves can transmit the light rays reflected by the second face to different positions of the second face, and the light emitting uniformity of the lamp is further improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a lens according to an embodiment of the present invention;

FIG. 2 is a bottom view of a lens according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of the lens of FIG. 2 taken along the A-A direction;

FIG. 4 is an enlarged view at B in FIG. 3;

fig. 5 is a schematic diagram of a lamp according to an embodiment of the present invention.

The main reference numerals illustrate:

a lens 10; a first face 11; an entrance cavity 111; a light incident surface 111a; an annular region 112; a tapered slot 1121; a boss 113; a limit groove 1131; a heat radiation groove 1132; a second face 12; a middle region 121; a peripheral region 122; a lamp panel 20.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1 to 4, in a first aspect, the present invention discloses a lens, which is applied to a lamp, and the lamp includes a lamp bead. The lens 10 includes a first surface 11 and a second surface 12 disposed opposite to each other, the middle portion of the first surface 11 is recessed toward the second surface 12 to form an optical cavity 111, a cavity wall surface of the optical cavity 111 forms an optical incident surface 111a, the optical cavity 111 is configured to correspond to the light beads, so as to be configured to reflect light emitted by the light beads, so that the light diverges in a direction away from the optical axis O, and the second surface 12 is configured to refract a portion of the light refracted by the optical incident surface 111a to the outside of the lens 10, so that the light diverges in a direction away from the optical axis O. The first surface 11 has an annular region 112, the annular region 112 is disposed around the periphery of the light incident surface 111a, the annular region 112 is provided with a plurality of tapered grooves 1121 recessed toward the second surface 12, the second surface 12 is further configured to reflect a portion of the light refracted by the light incident surface 111a toward the annular region 112, and a plurality of groove surfaces of the tapered grooves 1121 are disposed toward the second surface 12, such that each groove surface of the plurality of tapered grooves 1121 reflects the light reflected by the second surface 12 toward different positions of the second surface 12.

It can be understood that the lens 10 has an optical axis O, and the light emitted from the corresponding lamp beads toward the light entrance cavity 111 can be diffused through the light entrance surface 111a and enter the lens 10, and after the light is continuously transmitted to the second surface 12, part of the light can be diffused out of the lens 10 through the second surface 12. In this process, if the angle between the light beam emitted by the lamp bead and the optical axis O is a1, if the angle between the light beam emitted by the lamp bead and the optical axis O after being diverged by the light incident surface 111a and entering the lens 10 is a2, a2> a1, and after being transmitted to the second surface 12, a part of the light beam refracted by the light incident surface 111a is transmitted to the outside of the lens 10 through the second surface 12, and if the angle between the light beam emitted by the lamp bead and the optical axis O is a3, a3> a2, so that the light beam emitted by the lamp bead can be emitted to the outside of the lens 10 for illumination after being diverged twice, thereby increasing the light beam emitting angle, realizing that a part of the light beam is transmitted in the direction forming a large angle with the optical axis O, and being beneficial to increasing the beam angle of the lamp.

The light emitted from the second surface 12 to the outside of the lens 10 is removed, and part of the light is reflected from the second surface 12 to the annular region 112 of the first surface 11, and since the annular region 112 is provided with a plurality of tapered grooves 1121 recessed toward the second surface 12, when the part of the light is transmitted to the tapered grooves 1121, one or more reflections can be performed again through the tapered grooves 1121, so that the part of the light can be transmitted toward the second surface 12 again and emitted from the second surface 12 to the outside of the lens 10, thereby being beneficial to improving the light utilization rate and ensuring that the lamp beads have higher light efficiency. It should be noted that multiple reflections can also be performed between the annular region 112 and the second surface 12, so that more light is emitted from the second surface 12 to the outside of the lens 10.

Moreover, since the groove surfaces of the tapered groove 1121 can be disposed towards different positions of the second surface 12, each groove surface of the tapered groove 1121 can be used for reflecting light, and the groove surfaces of the tapered groove 1121 can transmit the light reflected by the second surface 12 towards different positions of the second surface 12, or the groove surfaces of the tapered groove 1121 can transmit the light reflected by the second surface 12 to the groove surfaces of a plurality of adjacent tapered grooves 1121, and then the light is transmitted towards different positions of the second surface 12 via the groove surfaces of the plurality of adjacent tapered grooves 1121, so that under the combined action of the plurality of tapered grooves 1121 in the annular region 112, the light can be uniformly transmitted to each position of the second surface 12, thereby ensuring the light emitting uniformity and improving the lighting effect.

It should be noted that the plurality of tapered slots 1121 are recessed toward the second surface 12, which means that the inner diameters of the plurality of tapered slots 1121 gradually decrease along the direction from the first surface 11 to the second surface 12, and the plurality of slot surfaces of the tapered slots 1121 are disposed toward the second surface 12, so that the projection of the vertex of the tapered slots 1121 on the first surface 11 is located in the notch of the tapered slots 1121. Wherein, the vertex of the tapered slot 1121 is the common connection point of the slot faces of the tapered slot 1121.

In some embodiments, the tapered slot 1121 is a rectangular pyramid slot, and a plurality of tapered slots 1121 are arrayed in the first direction and the second direction. The first direction, the second direction and the optical axis O direction are perpendicular to each other. It will be appreciated that if the tapered slot 1121 is a rectangular pyramid slot, the notch of the rectangular pyramid slot is parallelogram or trapezoid.

Illustratively, the first direction may be as shown in the X direction in fig. 2 and the second direction may be as shown in the direction in fig. 2. When the notch of the rectangular pyramid is a parallelogram, the length direction of the parallelogram is parallel to the first direction, the height direction is parallel to the second direction, and a plurality of rectangular pyramid grooves are arrayed along the first direction and the second direction which are mutually perpendicular. When the notch of the rectangular pyramid is trapezoidal, the length direction of the trapezoid is parallel to the first direction, the lower bottom of the trapezoid corresponds to the upper bottom of the adjacent trapezoid along the first direction, the height direction of the trapezoid is parallel to the second direction, and a plurality of rectangular pyramid grooves are arrayed along the first direction and the second direction which are mutually perpendicular.

The arrangement is favorable for tightly arranging a plurality of rectangular pyramid grooves so as to reflect as much light rays as possible to different positions of the second surface 12, and the uniformity of light emission is further improved. It is understood that in other embodiments, the tapered slot 1121 may also be a pentagonal pyramid slot, a hexagonal pyramid slot, and the like.

Further, the projection of the apex of the tapered slot 1121 on the first face 11 is located at the center of the slot opening of the tapered slot 1121. As described above, the notch of the rectangular pyramid slot may be parallelogram or trapezoid, that is, the notch of the rectangular pyramid slot has four vertex angles, the vertex of the rectangular pyramid slot is a common connection point of a plurality of slot surfaces, and the slot surfaces are planes formed by connecting lines of the vertex and two adjacent vertex angles in the notch, so when the projection of the vertex of the rectangular pyramid slot on the first surface 11 is located at the center of the notch of the rectangular pyramid slot, the area of each slot surface of the rectangular pyramid slot is advantageously ensured, so as to ensure that the plurality of rectangular pyramid slots can fully reflect light rays in all directions, improve the light utilization rate, and simultaneously facilitate improving the light emitting uniformity.

Specifically, the first surface 11 is perpendicular to the optical axis O, and the tapered slot 1121 is a regular rectangular pyramid slot, that is, not only can make a plurality of slot surfaces of the tapered slot 1121 all set up towards the second surface 12, and its notch is square, be favorable to making a plurality of tapered slots 1121 arrange along first direction and second direction on the array, the projection of its summit on the first surface 11 corresponds square center, can make the contained angle between four slot surfaces of tapered slot 1121 and the first surface 11 equal, the area of four slot surfaces equals, that is, tapered slot 1121 overall structure is more regular, be favorable to improving the light-emitting homogeneity.

It will be appreciated that the lens 10 described above may be manufactured by an injection molding process, and thus it is also convenient to perform demolding after injection molding of the lens 10 when the tapered slot 1121 is a square pyramid slot.

Further, when the plurality of tapered grooves 1121 are arranged in an array along the first direction and the second direction, the vertexes of the tapered grooves 1121 in the same direction are all on the same straight line, so that the arrangement of the plurality of tapered grooves 1121 on the first surface 11 is more regular, which is further beneficial to improving the light emitting uniformity of the lens 10.

Illustratively, the angle between the plurality of groove faces of the tapered groove 1121 and the first face 11 is b1, then 10+.b1+.ltoreq.45 °. B1 may be 10 °, 25 °, 30 °, 40 °, or 45 °, so that the slope of the groove surfaces of the tapered groove 1121 is relatively suitable, so that light transmitted to the second surface 12 by the light incident surface 111a is prevented from being affected by the excessive depth of the tapered groove 1121, and the situation that the groove surfaces are too gentle and cannot sufficiently reflect light to different positions of the second surface 12 is avoided.

Preferably, the plurality of tapered grooves 1121 in the annular region 112 are uniform in structure and are all regular rectangular pyramid grooves.

In some embodiments, a protruding portion 113 is disposed in the middle of the first surface 11, the annular region 112 is disposed around the periphery of the protruding portion 113, the protruding portion 113 is provided with a limiting groove 1131, the limiting groove 1131 penetrates the protruding portion 113 and is communicated with the light entering cavity 111, and the limiting groove 1131 is located around the periphery of the light entering cavity 111. Along the direction of the optical axis O, the depth of the limiting groove 1131 is equal to the height of the lamp bead, and the limiting groove 1131 is used for clamping the lamp bead, so that the focus of the light incident surface 111a coincides with the center of the light emergent surface of the lamp bead.

It can be understood that when the lens 10 is applied to a lamp, the lamp bead is disposed on the lamp panel, the lens 10 is required to be covered on the periphery of the lamp bead and connected to the lamp panel, at this time, the protrusion 113 can be disposed in contact with the lamp panel, the surface of the protrusion 113 in contact with the lamp panel can be provided with a limiting groove 1131, the lamp bead can be abutted to the bottom surface of the limiting groove 1131, so as to limit the movement of the lens 10 relative to the lamp bead in the direction along the optical axis O, and the side surface of the limiting groove 1131 can be abutted to the lamp bead, so as to limit the movement of the lens 10 relative to the lamp bead in the direction perpendicular to the optical axis O, and limit the relative position between the lens 10 and the lamp bead, so that the light emitting surface of the lamp bead is disposed corresponding to the light entering cavity 111, and the focus of the light entering surface 111a of the lens 10 coincides with the center of the light emitting surface of the lamp bead.

When the focal point of the light incident surface 111a of the lens 10 is coincident with the center of the light emergent surface of the lamp bead, the light incident surface 111a is favorable to fully receive the light emitted by the lamp bead, and after a part of the light emitted by the lamp bead is transmitted for a certain distance in the arc-shaped groove formed by the concave light incident surface 111a, the light reaches different positions of the light incident surface 111a, so that the light transmitted to the light incident surface 111a is prevented from being too concentrated, and the realization of large-angle light emergent is unfavorable.

Further, as shown in fig. 4, when the direction from the light incident surface 111a to the second surface 12 is the positive direction of the optical axis O, the distance h1 from the first surface 11 to the bottom surface of the limiting groove 1131 is greater than the distance h2 from the first surface 11 to the top of the tapered groove 1121 along the positive direction of the optical axis O. By the arrangement, on one hand, light entering the lens 10 from the light incident surface 111a can be prevented from directly irradiating the plurality of conical grooves 1121, on the other hand, the depth of the conical grooves 1121 is limited, and the situation that the inclination of the groove surfaces of the plurality of conical grooves 1121 is overlarge and the light cannot be reflected from the plurality of conical grooves 1121 to the second surface 12 is avoided.

In some embodiments, the protruding portion 113 is further provided with one or more heat dissipation grooves 1132, the heat dissipation grooves 1132 are located on the periphery of the limit groove 1131, and the heat dissipation grooves 1132 are communicated with the limit groove 1131. In order to facilitate heat dissipation and avoid the influence of the excessive temperature in the limit groove 1131 on the lamp bead and the lens 10, one or more heat dissipation grooves 1132 communicated with the limit groove 1131 and the external environment are arranged on the convex part 113 of the lens 10 so as to lead out the heat in the limit groove 1131.

Specifically, when the protruding portion 113 is provided with a plurality of heat dissipation grooves 1132, the plurality of heat dissipation grooves 1132 may be distributed around the periphery of the limiting groove 1131 in a circumferential array, so as to transfer heat in different directions of the lens 10, thereby improving the heat dissipation effect.

In some embodiments, the second surface 12 includes a middle area 121 and a peripheral area 122 located at the periphery of the middle area 121, the peripheral area 122 protrudes toward one side facing away from the light incident surface 111a, the middle area 121 is concave toward the light incident surface 111a, and the middle area 121 is concave at the paraxial region O, and the middle area 121 and the peripheral area 122 are smoothly transited through the concave convex surface, so that part of the light refracted by the light incident surface 111a is refracted outside the lens 10 by the second surface 12, and the light diverges toward the direction facing away from the optical axis O. It can be understood that, as shown in fig. 3, the central area has an inflection point, one side of the inflection point close to the optical axis O is a concave surface concave to the light incident surface 111a, one side of the inflection point far away from the optical axis O is a convex surface convex to the outside of the lens 10, and by forming the inflection point, the junction between the central area and the peripheral area 122 is more convex, so that when the light entering the lens 10 from the light incident surface 111a is transmitted to the junction and refracted to the outside of the lens 10, the light can be more diverged, and the light exiting from the lens 10 is more uniform.

Further, the radius of curvature of the light incident surface 111a at the paraxial region O is R1, and the radius of curvature of the central region at the paraxial region O is R2, 1.ltoreq.R2/R1.ltoreq.6.5. It can be understood that when the above relation is satisfied, the curvature radius of the light incident surface 111a and the central area of the lens 10 is advantageously controlled, so that the deviation angle of the light beam of the light source after entering the lens 10 due to the overlarge curvature radius of the light incident surface 111a of the lens 10 at the paraxial region O is avoided, too much light is concentrated at the position of the second surface 12 adjacent to the optical axis O to cause a bright spot at the center of the light spot, the light cannot be uniformly transmitted to the outside of the lens 10, and meanwhile, the overlarge curvature radius of the central area at the paraxial region O is avoided, so that the junction between the second surface 12 and the convex surface is too gentle, the light is difficult to diverge at a larger angle, and the light emitting uniformity of the lens 10 is affected.

For example, if the direction from the light incident surface 111a to the second surface 12 is positive, r1= -0.3mm, r2=1.8 mm may be obtained; r1= -1mm, r2=1.2 mm may be made; r1= -0.8mm, r2=1.6 mm may be made.

In some embodiments, the peripheral surface is disposed obliquely with respect to the optical axis O, and the peripheral surface may be frosted to reflect a portion of the light refracted by the light incident surface 111a toward the second surface 12, so as to improve the light utilization of the lens 10. Specifically, the peripheral surface of the lens 10 extends from the first surface 11 in a direction away from the optical axis O to be connected to the outer peripheral region of the second surface 12, but the light incident surface 111a protrudes from the peripheral surface in the positive direction of the optical axis.

In a second aspect, as shown in fig. 5, the present invention further discloses a lamp, which includes a lamp panel 20, a plurality of lamp beads and a plurality of lenses 10 as described above, wherein the plurality of lamp beads are distributed on one side of the lamp panel 20 at intervals, and the plurality of lenses 10 are correspondingly located on the light emitting sides of the plurality of lamp beads and are connected to the lamp panel 20. The lamp with the lens 10 is beneficial to increasing the beam angle of the lamp, enlarging the illumination range and improving the illumination uniformity.

In some embodiments, the light panel 20 is a circular light panel 20, and the distance between two adjacent lenses 10 gradually decreases along the direction from the center to the periphery of the light panel 20. It can be understood that when the lamp panel 20 is a circular lamp panel 20, the area to be illuminated at a large angle is larger when a large beam angle is realized, so that in order to improve the uniformity of the light emitted from the lamp, the lamp beads on the lamp panel 20 are arranged in an outer-dense and inner-sparse manner. Specifically, as shown in fig. 4, with the center of the circular lamp panel 20 as the center, a plurality of lamp beads can be enclosed into a plurality of circles with different radii, the plurality of lamp beads are uniformly distributed in the same circle, and along the direction from the center of the circular lamp panel 20 to the edge, the number of lenses 10 in the same circle is gradually increased, and the distance between two adjacent circles is gradually reduced.

Illustratively, the light panel 20 may employ double-sided routing.

In other embodiments, the lamp panel 20 may be a rectangular plate, and the beads may be uniformly distributed on one side.

In some embodiments, the side of the lamp panel 20 facing the lens 10 is provided with a reflective layer. It can be understood that when light is transmitted to the annular region of the first surface, part of the light can be reflected to the second surface by the rectangular pyramid groove in the annular region, and part of the light also penetrates through the annular region and is projected onto the lamp panel 20, so that in order to improve the overall light utilization rate of the lamp, a reflective layer is arranged on one side of the lamp panel 20, facing the lens 10, so that after the light penetrates through the annular region and is projected onto the lamp panel 20, the light can be reflected to the annular region again by the reflective layer, enters the lens 10 from the annular region and is transmitted towards the second surface.

The lens disclosed in the embodiment of the present invention and the lamp with the lens are described in detail, and specific examples are applied to the description of the principle and the implementation of the present invention, and the description of the above embodiments is only used for helping to understand the lens of the present invention, the lamp with the lens and the core ideas thereof; meanwhile, as those skilled in the art will vary in the specific embodiments and application scope according to the idea of the present invention, the present disclosure should not be construed as limiting the present invention in summary.

Claims

1. A lens, wherein the lens is applied to a lamp, the lamp comprising a lamp bead, the lens comprising:

2. The lens of claim 1, wherein the tapered groove is a rectangular pyramid groove, and a plurality of the tapered grooves are arrayed in a first direction and a second direction;

3. The lens of claim 2, wherein a projection of an apex of the tapered slot onto the first face is centered in a notch of the tapered slot.

4. The lens according to claim 1, wherein a protruding portion is arranged in the middle of the first surface, the annular region is arranged around the periphery of the protruding portion, the protruding portion is provided with a limiting groove, the limiting groove penetrates through the protruding portion and is communicated with the light entrance cavity, and the limiting groove is located around the periphery of the light entrance cavity;

5. The lens of claim 4, wherein the boss is further provided with one or more heat sink grooves, the heat sink grooves are located at the periphery of the limit groove, and the heat sink grooves are communicated with the limit groove.

6. The lens of any one of claims 1-5, wherein the second surface includes a central region and a peripheral region located at an outer periphery of the central region, the peripheral region protrudes toward a side facing away from the light entrance surface, the central region is concave toward the light entrance surface, and the central region is concave at a paraxial region, the central region and the peripheral region are smoothly transited by a convex surface, so that the second surface refracts a portion of the light refracted by the light entrance surface out of the lens, and the light diverges in a direction facing away from the optical axis.

7. The lens of claim 6, wherein the radius of curvature of the light entrance surface at the paraxial region is R1, and the radius of curvature of the central region at the paraxial region is R2, 1.ltoreq.R2/R1.ltoreq.6.5.

8. A lamp, comprising a lamp panel, a plurality of lamp beads and a plurality of lenses according to any one of claims 1-7, wherein the lamp beads are distributed on one side of the lamp panel at intervals, and the lenses are correspondingly positioned on the light emitting sides of the lamp beads and are connected to the lamp panel.

9. A light fixture as recited in claim 8, wherein said light panel is a circular light panel and wherein a distance between adjacent ones of said lenses is gradually reduced in a direction from a center of said light panel to an outer periphery thereof.

10. A luminaire as claimed in claim 8, characterized in that the side of the lamp panel facing the lens is provided with a reflective layer.