CN217302683U

CN217302683U - Lens and lamp

Info

Publication number: CN217302683U
Application number: CN202220919074.5U
Authority: CN
Inventors: 周良; 姜君城; 廖启威
Original assignee: Zhejiang Bicom Optics Co ltd
Current assignee: Zhejiang Bicom Optics Co ltd
Priority date: 2022-04-19
Filing date: 2022-04-19
Publication date: 2022-08-26
Anticipated expiration: 2032-04-19

Abstract

The application provides a lens and a lamp. The lens comprises a collimation part and a divergence part, wherein the collimation part is used for processing the light emitted by the lamp source into parallel light; the divergent part is arranged on one side of the collimation part far away from the lamp source; the light-emitting part is provided with at least one optical surface, the optical surface is a revolution surface taking the central axis of the lens as a rotation axis, the distance from the optical surface to the central axis gradually increases from one end close to the collimation part to the other end, the curvature radius of the at least one optical surface gradually increases from the central axis to the periphery, and the at least one optical surface is used for reflecting or refracting the parallel light rays emitted by the collimation part so as to enable the light rays to irradiate in a circular area. The lamp provided by the application is provided with the lens, so that light emitted by the lamp can cover a circular area, and the coverage range is wider.

Description

Lens and lamp

Technical Field

The application belongs to the technical field of lighting, and more specifically relates to a lens and a lamp.

Background

The fire-fighting emergency lamp is a lamp suitable for fire-fighting emergency lighting, and has long emergency time and high brightness and an automatic power-off emergency function. The fire-fighting emergency lamp has the characteristics of low power consumption, high brightness, long service life and the like, is provided with a power switch and a display lamp, and is suitable for public places such as factories, hotels, schools, units and the like for emergency lighting during power failure.

However, the angle of illumination of the fire emergency light on the existing market is small, so that the light coverage is small, and under the condition that the area is determined, a larger number of fire emergency lights are needed to meet the demand of emergency lighting, and the cost of emergency lighting is increased.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the application is to provide a lens and lamps and lanterns to solve the little technical problem who leads to increase emergency lighting cost of the angle of illumination of the fire emergency light that exists among the prior art.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions: provided is a lens including:

a collimation part for processing the light emitted by the lamp source into parallel light;

the divergent part is arranged on one side of the collimation part far away from the lamp source; the divergent part is provided with at least one optical surface, the optical surface is a revolution surface which takes the central axis of the lens as a rotation axis, the distance between the optical surface and the central axis is gradually increased from one end close to the collimation part to the other end, the curvature radius of the at least one optical surface is gradually increased from the central axis to the periphery, and the at least one optical surface is used for reflecting or refracting the parallel light rays emitted by the collimation part so as to enable the light rays to irradiate in a circular area.

In one possible design, the lens includes one of the optical surfaces that extends continuously from the central axis to the outer periphery.

In one possible design, the lens has at least two of the optical surfaces, the at least two optical surfaces being coaxially disposed about the central axis.

In one possible design, at least two projections of the optical surfaces on a first cross section are sequentially connected from the center to the periphery or sequentially spaced, and the first cross section is perpendicular to the central axis.

In one possible design, the lens has two optical surfaces, namely a first optical surface and a second optical surface, the first optical surface continuously extends outwards from the central axis, and the second optical surface is arranged around the periphery of the first optical surface.

In one possible design, the minimum radius of curvature of the second optical surface is greater than or equal to the maximum radius of curvature of the first optical surface.

In one possible design, the radius of curvature of at least the central region of the first optical surface is smaller than the critical angle for total reflection of the lens.

In one possible design, an optical groove is formed in the center of one end, away from the divergent part, of the collimation part, the optical groove is provided with a first curved surface facing the lamp source, and the collimation part is further provided with a second curved surface arranged around the periphery of the optical groove; the light rays emitted by the light source are processed by the first curved surface at the middle part to form first parallel light rays, and are processed by the second curved surface at the edge part to form second parallel light rays surrounding the first parallel light rays.

In one possible design, the first curved surface is a convex surface protruding towards the lamp source, and a part of the light emitted by the lamp source, which is located in the middle, is refracted by the first curved surface to form the first parallel light;

the second curved surface is a revolution surface, the curvature radius of the second curved surface is gradually reduced from one end close to the central shaft to one end far away from the central shaft, and the part of the light rays emitted by the light source, which are positioned at the edge, is reflected by the second curved surface to form the second parallel light rays.

The beneficial effect of the lens that this application provided lies in: compared with the prior art, the lens of the embodiment of the application has the advantages that the diverging part is provided with at least one optical surface, the optical surface is a revolution surface taking the central axis of the lens as a rotation axis, the distance from the optical surface to the central axis is gradually increased from one end close to the collimating part to the other end, the curvature of the at least one optical surface is gradually increased from the central axis to the periphery, so that the reflected light rays refracted or reflected by at least one optical surface are slowly converted from the direction close to the vertical direction to the direction close to the horizontal direction, and the reflected light rays cover the center of the lens to the periphery of the lens, thereby the range covered by the reflection light passing through at least one optical surface is wider, when the lens is applied to the lamps such as the fire emergency lamp, the irradiation range of the fire emergency lamp can be enlarged, and then can reduce the quantity of fire emergency light under the condition of equal area requirement, practice thrift the lamps and lanterns cost.

On the other hand, the application also provides a lamp comprising the lens.

The lamp provided by the embodiment of the application enables the light irradiated by the lamp to be in a circular area through the arrangement of the lens, so that the irradiation range of the lamp is wider, the number of the lamps is smaller under the condition of the same coverage area, and the cost of the lamp is saved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

FIG. 1 is a perspective view of a lens provided in an embodiment of the present application;

FIG. 2 is a schematic top view of the lens of FIG. 1;

FIG. 3 is a bottom view of the lens of FIG. 1;

FIG. 4 is a schematic cross-sectional view of the lens of FIG. 1;

FIG. 5 is a schematic optical path diagram of the lens of FIG. 4;

fig. 6 is a schematic view illustrating an effect of the lens of fig. 4 after being applied to a lamp.

Wherein, in the figures, the respective reference numerals:

100. a lens; 10. a collimating section; 11. an optical tank; 111. a first curved surface; 12. a second curved surface; 20. a dispersing section; 21. an optical surface; 21a, a first optical surface; 211a, a refraction portion; 212a, a reflection part; 21b, a second optical surface; 22. a connecting surface; 30. an installation part; 200. a light source.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is 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 of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings to facilitate the description of the application and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be constructed in operation as a limitation of the application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1, a lens 100 provided by an embodiment of the present application will now be described. The lens 100 may be used in a fire emergency lamp to diverge light emitted from the light source 200, thereby increasing the irradiation range of the fire emergency lamp. It is understood that, in other embodiments of the present application, the lens 100 may also be applied to other light fixtures, for example, street lamps, to expand the illumination range of the street lamps, and is not limited herein.

The lens 100 includes a collimating portion 10 and a diverging portion 20.

Referring to fig. 1 and 5, the collimating part 10 is used for processing the light emitted from the lamp source 200 into parallel light. Referring to fig. 5, taking the central axis of the lens 100 extending along the vertical direction as an example, the parallel light beams processed by the collimating part 10 are parallel light beams parallel to the vertical direction.

In addition, the light emitted from the lighting source generally covers one circular area on the light emitting side, and the parallel light processed by the collimating part 10 is located in the other circular area.

The divergent part 20 is disposed on a side of the collimating part 10 away from the lamp source 200, and the divergent part 20 includes at least one optical surface 21, that is, the parallel light processed by the collimating part 10 will pass through the at least one optical surface 21 and be optically processed by the at least one optical surface 21.

Specifically, when the optical surface 21 is a surface of revolution having the central axis of the lens 100 as a rotation axis, the optical surface 21 can process arbitrary light beams distributed in the circumferential direction. For example, when the projection of the optical surface 21 in a plane perpendicular to the central axis is a circle, parallel light rays in a circular area can be received and processed; when the projection of the optical surface 21 in a plane perpendicular to the central axis is circular, parallel light rays in a circular area can be received. In addition, in order to completely receive the parallel light rays incident from the collimating part 10, a projection area of at least one optical surface 21 in a plane perpendicular to the central axis is required to cover all the parallel light rays.

The distance from the optical surface 21 to the central axis is gradually increased from one end close to the collimation part 10 to the other end, and the curvature radius of at least one optical surface 21 is gradually increased from the central axis to the periphery; at least one optical surface 21 is used to reflect or refract the parallel light rays emitted from the collimating part 10 so that each light ray can be irradiated in a circular area.

Since the light rays incident on the optical surface 21 are all parallel light rays, when the curvature of the optical surface 21 is larger, that is, the inclination angle of the unit surface at the corresponding position of the optical surface 21 with respect to the vertical direction is larger, the incidence angle of the parallel light rays (i.e., the included angle between the parallel light rays and the unit surface) is larger, so that the included angle between the incident light rays and the emergent light rays is smaller, that is, the included angle between the reflected light rays and the vertical incident light rays is smaller, and the included angle is closer to the horizontal line; conversely, the farther away the reflected ray is from the horizontal. In other words, when the curvature of at least one optical surface 21 increases by the periphery of central axial gradually, reflection light will slowly be changed into by being close the horizontal direction by being close vertical direction, and reflection light covers lens 100 center to lens 100 periphery to make the scope of reflection light coverage through at least one optical surface 21 wider, when being applied to lamps and lanterns such as fire emergency light with this lens, can increase the irradiation range of fire emergency light, and then can reduce the quantity of fire emergency light under the condition of equal area requirement, practice thrift the lamps and lanterns cost. Meanwhile, when the curvature of the at least one optical surface 21 is reasonably set, the light refracted or reflected by the at least one optical surface 21 can cover a circular area.

In one embodiment, referring to fig. 1 to 4, the lens 100 has two optical surfaces 21, which are a first optical surface 21a and a second optical surface 21b, respectively, the first optical surface 21a and the second optical surface 21b are both curved surfaces and are both revolution surfaces, the first optical surface 21a and the second optical surface 21b are coaxially disposed with a central axis of the lens 100 as a center, the first optical surface 21a continuously extends from the central axis to the outside, and the second optical surface 21b surrounds the first optical surface 21 a.

The projections of the first optical surface 21a and the second optical surface 21b on the first cross section are connected to each other from the center to the periphery or are spaced from each other. Wherein the first cross section is a plane perpendicular to the central axis. Specifically, the projection of the first optical surface 21a on the first cross section is a circle with the center axis as the center, and the projection of the second optical surface 21b on the first cross section is an annular shape surrounding the first optical surface 21a, wherein the annular projection and the circular projection may be connected to each other or arranged at an interval.

The curvature of the first optical surface 21a gradually increases from the central axis to the outer circle, so that the parallel light rays in the central area of the lens 100 are reflected or refracted by the first optical surface 21a, and the reflected or refracted light rays are concentrated in a first circular area with the central axis as the center; the curvature of the second optical surface 21b gradually increases from one end close to the central axis to the other end, then the parallel light rays located at the edge area of the lens 100 are reflected by the second optical surface 21b, and the reflected light rays are concentrated in an annular area, and the annular area is surrounded outside the first circular area, so that the light rays refracted or reflected by the first optical surface 21a and the second optical surface 21b are located in a second circular area (as shown in fig. 6) in a large range, and further the light irradiation direction after passing through the lens 100 is larger.

In the embodiment, the first optical surface 21a and the second optical surface 21b are distributed from the inside to the outside of the lens 100, so that the occupied space of the first optical surface 21a and the second optical surface 21b along the axial direction of the lens 100 can be reduced, that is, the occupied space of the lens 100 along the circumferential direction can be reduced, and further, the appearance of the lens 100 is more attractive, and the assembly of the lens 100 in a lamp is facilitated.

It is understood that, in other embodiments of the present application, the lens 100 may further have third, fourth, and fourth or above optical surfaces 21 and a fourth optical surface 21 according to practical situations and specific requirements, that is, the lens 100 has at least two optical surfaces 21, the at least two optical surfaces 21 are coaxially disposed with the central axis as the center, and the projections of the at least two optical surfaces 21 on the first cross section are sequentially connected or sequentially spaced from the center to the periphery.

In one embodiment, the minimum radius of curvature of the second optical surface 21b is equal to the maximum radius of curvature of the first optical surface 21 a. As can be seen from the foregoing, the curvature radius of the first optical surface 21a gradually increases from the central axis to the outside, and the curvature radius of the second optical surface 21b gradually increases from the end close to the central axis to the end far from the central axis, so that when the minimum curvature radius of the second optical surface 21b is equal to the maximum curvature radius of the first optical surface 21a, the curvature radius of the whole of the first optical surface 21a and the second optical surface 21b gradually increases from the center to the periphery of the lens 100, so that the light refracted or reflected by the first optical surface 21a and the second optical surface 21b gradually diverges from the center of the lens 100 to the periphery of the lens 100, and the light passing through the lens 100 is uniformly distributed in the second circular area, which is favorable for illumination. It is understood that in other embodiments of the present application, the minimum curvature radius of the second optical surface 21b may be set to be larger than the maximum curvature of the first optical surface 21a, that is, the first circular area and the annular area have a slight gap therebetween, but the overall illumination range of the lamp is not affected. In addition, in some embodiments of the present application, the minimum curvature radius of the second optical surface 21b may also be set to be smaller than the maximum curvature radius of the first optical surface 21a, that is, the first circular area and the annular area are slightly overlapped, which also does not affect the whole illumination range of the lamp.

In one embodiment, referring to fig. 4 and 5, the radius of curvature of at least the central region of the first optical surface 21a is smaller than the critical angle of total reflection of the lens 100.

Preferably, the first optical surface 21a has a refractive portion 211a and a reflective portion 212a, the refractive portion 211a is a central region of the first optical surface 21a, the reflective portion 212a is provided around the reflective portion 212a, and the reflective portion 212a is a portion of the first optical surface 21a except for the central region. The radius of curvature of the refraction portion 211a is smaller than the critical angle of total reflection of the lens 100, the light passing through the refraction portion 211a will be refracted out, and as shown in fig. 5, the light passing through the refraction portion 211a will be deflected toward the central region to be located at the central position right in front of the lens 100. The curvature radius of the reflection portion 212a is greater than or equal to the critical angle of total reflection of the lens 100, so that the light passing through the reflection portion 212a will be totally reflected to the periphery.

It is understood that in other embodiments of the present application, the curvature radius of the first optical surface 21a may be designed to be smaller than the critical angle of total reflection of the lens 100. This application is through being less than the critical angle of total reflection with the radius of curvature of the regional at least center of first optical surface 21a to make at least partial light will be by the regional deflection of dead ahead center to lens 100, with the dead ahead center of guaranteeing lens 100 has the light to shine, and then makes the irradiation range of lamps and lanterns wide.

Referring to fig. 4, the bottom end of the second optical surface 21b is connected to the top end of the first optical surface 21a through a connection surface 22, wherein the connection surface 22 may be a conical surface or a cylindrical surface. For example, when the second optical surface 21b and the first optical surface 21a are connected to each other in projection on the first cross section, the connection surface 22 is a cylindrical surface; when the projections of the second optical surface 21b and the first optical surface 21a on the first cross section are spaced from each other, the connecting surface 22 is a conical surface.

The height of the connecting surface 22 may be set according to the diameter of the lens 100 and the curvature of the two optical surfaces 21.

Referring to fig. 4, the divergent portion 20 is integrally connected to the collimating portion 10, the outer peripheral wall of the divergent portion 20 is a circular table with an outer diameter gradually decreasing from one end near the collimating portion 10 to the other end, and the inner side wall of the divergent portion 20 is formed by sequentially connecting a second optical surface 21b, a connecting surface 22 and a first optical surface 21 a.

In one embodiment, referring to fig. 4, the collimating part 10 is in the shape of a circular truncated cone, an optical groove 11 is formed in the center of one end of the collimating part 10 away from the diverging part 20, and the light source 200 may be disposed at the center of the bottom of the optical groove 11 or at the center below the optical groove 11. The optical groove 11 has a first curved surface 111 facing the lamp source 200, and the collimating part 10 further has a second curved surface 12 surrounding the optical groove 11; the light emitted from the lamp source 200 is processed by the first curved surface 111 to form a first parallel light, and the light at the edge is processed by the second curved surface 12 to form a second parallel light surrounding the first parallel light. That is, the light emitted from the lamp source 200 can be processed by the first curved surface 111 and the second curved surface 12 to form parallel light.

In one embodiment, referring to fig. 4, the first curved surface 111 is a convex surface protruding toward the lamp source, and a portion of the light emitted from the lamp source 200 in the middle is refracted by the first curved surface 111 to form a first parallel light; the second curved surface 12 is a surface of revolution, and the radius of curvature of the second curved surface 12 is gradually smaller from one end close to the central axis to one end far from the central axis, and the portion of the light emitted by the lamp source 200 at the edge is reflected by the second curved surface 12 to form a second parallel light.

The working principle of the second curved surface 12 is similar to that of the second optical surface 21b, at least the second curved surface 12 reflects incident light rays with different angles into parallel light rays, and the second optical surface 21b reflects the parallel light rays into divergent light rays.

The first curved surface 111 is used for deflecting the light rays with different angles into mutually parallel light rays, and the specific curvature change can be set according to actual requirements.

In one embodiment, the collimating part 10 and the diverging part 20 are an integral connecting structure, which may be integrally formed.

In addition, the lens 100 further comprises a mounting portion 30 protruding from the outer periphery of the connection portion between the collimating portion 10 and the diverging portion 20, and the mounting portion 30 is used for mounting and positioning the lens 100.

In another embodiment of the present application, the lens 100 includes an optical surface 21, the optical surface 21 extends continuously from the center to the outer periphery of the lens 100, and the distance from the optical surface 21 to the central axis gradually increases from the end near the collimating part 10 to the end far from the collimating part 10. In this embodiment, the first optical surface 21a is connected to the bottom end of the second optical surface 21b in the foregoing embodiments, which also enables circular illumination of light, and since the first optical surface 21a and the second optical surface 21b extend continuously, division of light is not required, so that the light emitting effect is better.

On the other hand, the present application further provides a lamp, which includes the lamp source 200 and the lens 100.

In this embodiment, the lamp is a fire emergency lamp for lighting in fire emergency. The utility model provides a fire emergency light is through using above-mentioned lens 100 for the scope of illumination of this fire emergency light is bigger, under the same area of illumination's the condition, can reduce the quantity of fire emergency light as far as possible, practices thrift the cost of fire emergency light.

It is understood that, in other embodiments of the present application, the light fixture may also be other types of light fixtures according to actual needs, for example, a street lamp with a large illumination range is required, and the present application is not limited only.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A lens, comprising:

2. The lens of claim 1 wherein said lens includes one of said optical surfaces, said optical surface extending continuously from said central axis to said outer periphery.

3. The lens of claim 1, wherein said lens has at least two of said optical surfaces, at least two of said optical surfaces being coaxially disposed about said central axis.

4. The lens of claim 3, wherein at least two of the optical surfaces have projections in a first cross-section that are sequentially contiguous or sequentially spaced from the center to the periphery, the first cross-section being perpendicular to the central axis.

5. The lens of claim 4, wherein the lens has two optical surfaces, a first optical surface and a second optical surface, the first optical surface extending continuously outward from the central axis, the second optical surface being disposed around a periphery of the first optical surface.

6. The lens of claim 5, wherein the minimum radius of curvature of the second optical surface is greater than or equal to the maximum radius of curvature of the first optical surface.

7. The lens of claim 5, wherein a radius of curvature of at least a central region of the first optical surface is less than a critical angle for total reflection of the lens.

8. The lens of any of claims 1-7, wherein an end of the collimating portion facing away from the diverging portion is recessed centrally to form an optical groove, the optical groove having a first curved surface facing the light source, the collimating portion further having a second curved surface disposed around a periphery of the optical groove; the light rays emitted by the light source are processed by the first curved surface at the middle part to form first parallel light rays, and are processed by the second curved surface at the edge part to form second parallel light rays surrounding the first parallel light rays.

9. The lens of claim 8, wherein the first curved surface is convex toward the light source, and the middle portion of the light emitted from the light source is refracted by the first curved surface to form the first parallel light;

10. Luminaire comprising a lens as claimed in any one of the claims 1 to 9.