CN213712698U

CN213712698U - Lens and lamp with same

Info

Publication number: CN213712698U
Application number: CN202022375245.6U
Authority: CN
Inventors: 何祖平; 刘小云; 陈东; 杨君
Original assignee: Ningbo Self Electronics Co Ltd
Current assignee: Ningbo Self Electronics Co Ltd
Priority date: 2020-10-22
Filing date: 2020-10-22
Publication date: 2021-07-16
Anticipated expiration: 2030-10-22

Abstract

The utility model discloses a lens, the lens is rectangular shape, the bottom surface of lens is into the plain noodles, the top surface of lens is first play plain noodles, one side of lens is first total reflection face at least partly, the opposite side of lens is second total reflection face at least partly, the outside of advancing the plain noodles is equipped with the light source setting department of taking the principal optical axis, in the cross section of lens, the principal optical axis passes advance the plain noodles and the middle zone of first play plain noodles, the part light that is close to in the lens the principal optical axis directly passes through first play plain noodles and exits, the part light that keeps away from in the lens the principal optical axis passes through after second total reflection face and the total reflection of first total reflection face exit through first play plain noodles, one side that the lens was equipped with first total reflection face is equipped with the second play plain noodles that is located between first total reflection face and the first play plain noodles, and part of the light rays far away from the main optical axis in the lens directly exit through the second light-emitting surface.

Description

Lens and lamp with same

Technical Field

The utility model relates to the field of lighting technology, especially a lens and have lamps and lanterns of this lens.

Background

Under the background of energy conservation and environmental protection, the LED lamp is increasingly applied to the fields of household and commercial illumination because of high light emitting efficiency and good light condensing performance. Meanwhile, people are continuously pursuing better illumination effect, so that the LED lamp is expected to meet various illumination requirements. Particularly in the case where large-area, long-distance irradiation is required, it is desirable to make the illuminance of the irradiated area as uniform as possible. Because the light-emitting effect of the LED chip cannot meet the illumination requirement, the secondary optical design needs to be carried out through the cooperation of the lens to meet the specific light distribution requirement. According to the rule of light irradiation, compared with the irradiated area with a short light irradiation distance, the farther the light irradiation distance is, the more scattering is, the larger the irradiation range is, so that the illuminance of the area with the farther the irradiation distance is, and the problem of poor irradiation uniformity is caused.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a lens and a lamp with the lens to solve the above technical problems.

A lens is in a strip shape, the bottom surface of the lens is a light inlet surface, the top surface of the lens is a first light outlet surface, one side of the lens is at least partially a first total reflection surface, the other side of the lens is at least partially a second total reflection surface, a light source setting position with a main optical axis is arranged on the outer side of the light inlet surface, in a cross section of the lens, the main optical axis passes through a middle area of the light inlet surface and the first light outlet surface, part of the light rays close to the main optical axis in the lens are directly emitted through the first light emitting surface, part of the light rays far away from the main optical axis in the lens are totally reflected by the second total reflection surface and the first total reflection surface and then emitted through the first light emitting surface, and a second light-emitting surface positioned between the first total reflection surface and the first light-emitting surface is arranged on one side of the lens provided with the first total reflection surface, and part of light rays in the lens far away from the main optical axis directly exit through the second light-emitting surface.

Preferably, an irradiation surface parallel to the length direction of the lens is arranged on the outer side of the first total reflection surface, and the included angle between the main optical axis and the irradiation surface is 0-20 degrees.

Preferably, an included angle between the light emitted through the first light emitting surface after being totally reflected by the second total reflection surface and the irradiation surface is larger than an included angle between the light emitted through the first light emitting surface after being totally reflected by the first total reflection surface and the irradiation surface.

Preferably, the included angle between the light directly emitted through the second light emitting surface and the irradiation surface is larger than the included angle between the light totally reflected by the first total reflection surface and the irradiation surface.

Preferably, the bottom surface of the lens is recessed inwards to form a sink groove, and the inner wall of the sink groove forms the light inlet surface.

Preferably, the top surface of the sinking groove is a light-condensing curved surface, and light rays incident from the light-condensing curved surface are directly emitted through the first light-emitting surface.

Preferably, the second light emitting surface is a diffusion surface.

Preferably, the second light emitting surface is a frosted surface.

Preferably, the second light-emitting surface is a diffusion curved surface.

The lamp comprises a lamp holder and a light source arranged on the lamp holder, and is characterized in that the lamp holder is further provided with the lens, and the light source is arranged at the light source.

Preferably, the direction of maximum light intensity of the light source coincides with the main optical axis.

Preferably, the lamp holder is rectangular, the cross section is U-shaped, one side of the lamp holder is provided with a light source and a lens, and the other side of the lamp holder is provided with a light shield.

Preferably, the LED lamp further comprises a circuit board arranged on the lamp holder, the light sources are LED chips and are arranged on the circuit board at intervals along the length direction.

The technical effects of the utility model:

the utility model discloses a lens and lamps and lanterns can many light manage in groups, and it is bigger to obtain the illumination area, throws light on more even light-emitting effect.

Drawings

Embodiments of the present invention are described below with reference to the accompanying drawings, in which:

fig. 1 is a schematic perspective view of a lens of this embodiment.

Fig. 2 is a schematic structural diagram of the lens of the present embodiment.

Fig. 3 is a schematic structural diagram of the lamp of the present embodiment.

Fig. 4 is a schematic diagram of an optical path of the lamp of the present embodiment on the irradiation surface.

Fig. 5 is an enlarged schematic view of a portion a in fig. 4.

Fig. 6 is a schematic structural diagram of a lens according to another embodiment.

Fig. 7 is a schematic structural diagram of a lens according to another embodiment.

Detailed Description

The following describes in further detail specific embodiments of the present invention based on the drawings. It should be understood that the description herein of embodiments of the invention is not intended to limit the scope of the invention.

As shown in fig. 1 to 5, the lens 100 of the present embodiment is a strip-shaped lens, which is convenient for manufacturing and is suitable for use in a strip-shaped lamp, and can be manufactured by extrusion molding or injection molding, and the shape of the lens along the length direction is the same for convenience of manufacturing. The lens 100 of this embodiment is formed by surrounding a top surface, a bottom surface and two sides, wherein the bottom surface of the lens 100 is a light entering surface 101, the top surface of the lens 100 is a first light exiting surface 102, at least a part of one side of the lens 100 is a first total reflection surface 103, at least a part of the other side of the lens 100 is a second total reflection surface 104, and the design that the two sides of the lens 100 are total reflection surfaces is the prior art, and the two sides of the lens 100 are generally arranged obliquely outward, and may be an arc surface or a straight surface. A light source setting part 200 with a main optical axis 201 is arranged on the outer side of the light inlet surface 101, the light source setting part 200 of the present embodiment is used for arranging light sources, the light sources adopted in the present embodiment generally have a maximum light intensity direction, and the maximum light intensity direction is defined as the position of the main optical axis 201.

Because the utility model discloses an emphasis lies in the grading in the perpendicular length direction plane, and length direction's grading can be controlled through the setting of light source, therefore the emphasis is in the cross section of lens 100, main optical axis 201 passes the light inlet surface 101 and the middle zone of first play plain noodles 102, some light that is close to main optical axis 201 in lens 100 directly passes through first play plain noodles 102 and is emergent, some light that keeps away from main optical axis 201 in lens 100 passes through second total reflection surface 104 and first total reflection surface 103 total reflection back through first play plain noodles 102 and is emergent, the aforesaid is the grading scheme of prior art, and the total reflection of both sides is emergent after the light total reflection of light source both sides, and at this moment, the outside of first total reflection surface 103 will not have illumination, and when the lens 100 of this embodiment is used in the illumination on a large scale, illumination face 400 sets up in the side of lens 100, the above arrangement may cause no light in a region perpendicular to the illumination surface 400 of the lens 100, and may have a dark region, for this reason, in this embodiment, a second light emitting surface 105 located between the first total reflection surface 103 and the first light emitting surface 102 is disposed on a side of the lens 100 where the first total reflection surface 103 is disposed, and a part of the light rays in the lens 100 away from the main optical axis 201 directly exit through the second light emitting surface 105. The light rays in the lens 100 refer to light rays entering the lens from the light entrance surface 101.

In this embodiment, the first light emitting surface 102 and the second light emitting surface 105 intersect at an acute angle, and the angle is 75 ° to 89 °. Of course, the angle can be set as required, as long as the second light emitting surface 105 is disposed on the side surface and the first light emitting surface 102 is disposed on the top surface.

In this embodiment, a part of the light rays far away from the main optical axis 201 in the lens 100 refer to large-angle light rays in the light source, and the light intensity is weak, and a part of the light rays close to the main optical axis 201 in the lens 100 refer to small-angle light rays in the light source, and the light intensity is strong, wherein the maximum light intensity direction is at the position of the main optical axis 201. Since the second light emitting surface 105 is disposed between the first total reflection surface 103 and the first light emitting surface 102, the light emitted through the first light emitting surface 102 is closer to the main optical axis 201 than the light totally reflected on the first total reflection surface 103, and the light directly emitted from the second light emitting surface 105 can illuminate the area of the lens 100 perpendicular to the illumination surface 400, so that the entire illumination surface 400 can be illuminated.

In order to obtain a large illumination range, in this embodiment, an illumination surface 400 parallel to the longitudinal direction of the lens 100 is disposed outside the first total reflection surface 103, and an included angle α between the main optical axis 201 and the illumination surface 400 is 0 ° to 20 °. The plane 401 is parallel to the illumination plane 400.

An included angle between the light emitted through the first light emitting surface 102 after being totally reflected by the second total reflection surface 104 and the irradiation surface 400 is larger than an included angle between the light emitted through the first light emitting surface 102 after being totally reflected by the first total reflection surface 103 and the irradiation surface 400. It can be seen that the light totally reflected by the second total reflection surface 104 and emitted through the first light emitting surface 102 mainly irradiates a position closer to the lens 100, and the light totally reflected by the first total reflection surface 103 and emitted through the first light emitting surface 102 and the light directly emitted through the first light emitting surface 102 irradiate a position farther from the lens 100, so that continuous, uniform and large-scale illumination on the illumination surface 400 can be realized.

Similarly, the included angle between the light directly emitted through the second light emitting surface 105 and the irradiation surface 400 is larger than the included angle between the light totally reflected by the first total reflection surface 103 and the irradiation surface 400, and the light emitted through the first light emitting surface 102 and the irradiation surface 400. The light directly emitted through the second light emitting surface 105 mainly irradiates a position closer to the lens 100.

In order to improve the light utilization rate, in this embodiment, the bottom surface of the lens 100 is recessed to form a sunken groove 1011, and the inner wall of the sunken groove 1011 forms the light inlet surface 101. Further, the top surface of the sinking groove 1011 is a light-gathering curved surface 1012, and light rays incident from the light-gathering curved surface 1012 directly exit through the first light-exiting surface 102. Illuminating a remote location. In addition, the two sidewalls 1013 of the slot 1011 refract light to two sides, wherein the light totally reflected by the first total reflection surface 103 is substantially parallel to the main optical axis or has a small angle with the main optical axis, and illuminates a far region,

in order to increase the irradiation range of the light emitted from the second light emitting surface 105, the second light emitting surface 105 is a diffusion surface. In this embodiment, the second light emitting surface 105 is a frosted surface.

As shown in fig. 6, in another embodiment, the second light emitting surface 105 is a diffusion curved surface.

As shown in fig. 7, in another embodiment, the second light emitting surface 105 is formed by continuously arranging a plurality of diffusion curved surfaces.

The lamp of the embodiment includes a lamp holder 500 and a light source 600 arranged on the lamp holder 500, the lens 100 is further arranged on the lamp holder 500, and the light source 600 is located at the light source arrangement position 200.

In this embodiment, the light source 600 has a maximum light intensity direction, and the maximum light intensity direction of the light source 600 coincides with the main optical axis 201.

The lamp holder 500 is in a long strip shape, the cross section of the lamp holder is in a U shape, one side of the lamp holder 500 is provided with the light source 600 and the lens 100, and the other side of the lamp holder 500 is provided with the light shield 501.

The LED light source comprises a light source 600 and a circuit board 800 arranged on the light holder 500, wherein the light source 600 is provided with a plurality of LED chips and is arranged on the circuit board 800 at intervals along the length direction. At this time, the main optical axis 201 (the direction of maximum light intensity) is perpendicular to the plane of the circuit board 800.

The above description is only for the preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention, and any modification, equivalent replacement or improvement within the spirit of the present invention is encompassed by the claims of the present invention.

Claims

1. The lens (100) is long in strip shape, the bottom surface of the lens (100) is a light inlet surface (101), the top surface of the lens (100) is a first light outlet surface (102), at least part of one side of the lens (100) is a first total reflection surface (103), at least part of the other side of the lens (100) is a second total reflection surface (104), a light source setting part (200) with a main optical axis (201) is arranged on the outer side of the light inlet surface (101), in the cross section of the lens (100), the main optical axis (201) penetrates through the middle area of the light inlet surface (101) and the first light outlet surface (102), part of light rays in the lens (100) close to the main optical axis (201) are directly emitted through the first light outlet surface (102), and part of light rays in the lens (100) far away from the main optical axis (201) are totally reflected by the second total reflection surface (104) and the first total reflection surface (103) and then exit through the first light outlet surface (102) The light source is characterized in that a second light emitting surface (105) located between the first total reflection surface (103) and the first light emitting surface (102) is arranged on one side, provided with the first total reflection surface (103), of the lens (100), and part of light rays in the lens (100) far away from the main optical axis (201) directly exit through the second light emitting surface (105).

2. The lens (100) of claim 1, wherein an irradiation surface (400) parallel to the length direction of the lens (100) is arranged outside the first total reflection surface (103), and the included angle between the main optical axis (201) and the irradiation surface (400) is 0-20 °.

3. The lens (100) of claim 2, wherein an angle between the light exiting through the first light exiting surface (102) after being totally reflected by the second totally reflecting surface (104) and the illumination surface (400) is larger than an angle between the light exiting through the first light exiting surface (102) after being totally reflected by the first totally reflecting surface (103) and the illumination surface (400).

4. The lens (100) of claim 2, wherein an angle between a light directly exiting through the second light exiting surface (105) and the illumination surface (400) is larger than an angle between a light totally reflected by the first total reflection surface (103) and exiting through the first light exiting surface (102) and the illumination surface (400).

5. The lens (100) of any of claims 1 to 4, wherein the bottom surface of the lens (100) is recessed to form a recessed groove (1011), and the inner wall of the recessed groove (1011) forms the light inlet surface (101).

6. The lens (100) of claim 5, wherein the top surface of the groove (1011) is a converging curved surface (1012), and the light incident from the converging curved surface (1012) directly exits through the first light exiting surface (102).

7. The lens (100) of any of claims 1 to 4, wherein the second light exit surface (105) is a diffuser surface.

8. The lens (100) of any of claims 1 to 4, wherein the second light exit surface (105) is a frosted surface.

9. The lens (100) of any of claims 1 to 4, wherein the second light exit surface (105) is a diffusion surface.

10. A luminaire comprising a lamp holder (500) and a light source (600) arranged on said lamp holder (500), wherein said lamp holder (500) is further provided with a lens (100) according to any one of claims 1 to 9, and said light source (600) is located at a light source location (200).

11. A luminaire as claimed in claim 10, characterized in that the direction of maximum light intensity of the light source (600) coincides with the main optical axis (201).

12. A lamp as claimed in claim 10, characterized in that the lamp holder (500) is elongated and U-shaped in cross-section, and the lamp holder (500) is provided with a light source (600) and a lens (100) on one side and a light shield (501) on the other side.

13. The lamp as claimed in claim 10, further comprising a circuit board (800) disposed on the lamp holder (500), wherein the light source (600) is a plurality of LED chips disposed on the circuit board (800) at intervals along the length direction.