CN114811521A - Surface lens, optical structure and lamp - Google Patents

Abstract

The invention discloses a surface lens, which comprises a lens body, wherein the lens body is provided with a first surface and a second surface, the first surface is provided with a center, and the first surface is provided with a light changing structure; the light changing structure comprises a plurality of grooves and bulges, wherein the grooves and the bulges are alternately arranged in the direction of a circumference line with the center as the circle center and the same radius distance; the grooves and the bulges are alternately arranged in the same radial direction which takes the center as the circle center and extends from the position close to the center to the peripheral position. The invention further provides an optical structure and a lamp.

Description

Surface lens, optical structure and lamp

Technical Field

The invention relates to the technical field of illumination, in particular to a surface lens, an optical structure and a lamp.

Background

The existing lighting product has the characteristic of high luminous efficacy in order to save energy, and the emitted light has the defects of strong light and non-uniform light, and can cause serious injury to eyes of people after being directly irradiated for a long time. In order to adapt the light to the eyes of human beings, lenses or optical structures composed of lenses are used for distributing and adjusting the light emitted by the light source.

Disclosure of Invention

The invention aims to provide a surface lens for distributing light emitted by a light source.

The invention aims to provide an optical structure convenient for dimming.

The invention aims to provide a lamp with a compact structure.

In order to achieve the purpose, the invention adopts the following technical scheme:

a face lens comprising a lens body having a first face with a center and a second face with a light altering feature; the light changing structure comprises a plurality of grooves and bulges, wherein the grooves and the bulges are alternately arranged in the circumferential direction of the same radius distance with the center as the circle center; and the grooves and the bulges are alternately arranged in the same radial direction which takes the center as a circle center and extends from the position close to the center to the peripheral position.

Preferably, a pivot portion is provided at the center of the first surface.

Preferably, in a circumferential direction of the same radius distance with the center as a circle center, the size of the grooves is the same, and the size of the protrusions is the same; in the same radial direction extending from the position close to the center to the periphery by taking the center as a circle center, the size of the groove is in direct proportion to the distance from the groove to the center, and the size of the bulge is in direct proportion to the distance from the bulge to the center.

Preferably, the grooves and the protrusions are continuously arranged in the direction of a circumference of the same radius distance with the center as the center of the circle; and the grooves and the bulges are continuously arranged in the same radial direction which takes the center as the circle center and extends from the position close to the center to the peripheral position.

Preferably, the surface lens body has a disk shape, and an annular mounting portion is provided on a periphery of the surface lens body.

Preferably, the second surface of the surface lens body is a smooth surface.

An optical structure comprises a focusing lens, wherein the focusing lens comprises two surface lenses, the two surface lenses are arranged in parallel at intervals, the first surfaces of the two surface lenses are arranged oppositely, and the centers of the two surface lenses are positioned on the same rotary axis and can rotate relatively.

Preferably, the optical module further comprises a total internal reflection lens spaced apart from the second surface of the surface lens.

Preferably, the total internal reflection lens includes a first light incident surface, a second light incident surface, a first light emitting surface, a second light emitting surface, and a total reflection surface; the second light incident surface is connected with the periphery of the first light incident surface; the first light emitting surface is opposite to the first light incident surface; the second light-emitting surface is connected with the periphery of the first light-emitting surface; the full-reflecting surface is connected with the second light incident surface and the second light emergent surface and is a smooth curved surface surrounding the central axis of the lens.

A lamp comprises a lamp shell, a light-emitting component and the optical structure, wherein the lamp shell is provided with an accommodating space with an opening, the light-emitting component is assembled on the lamp shell, and the optical structure is arranged at the opening.

Compared with the prior art, the invention has the following advantages:

the surface lens has the function of distributing light to the light emitted by the light source.

The optical structure of the invention has simple structure and more convenient adjustment.

The lamp provided by the invention is compact in structure.

Drawings

FIG. 1 is a perspective view of a preferred embodiment of a face lens of the present invention.

FIG. 2 is a cross-sectional view of a preferred embodiment of a face lens of the present invention.

FIG. 3 is a perspective view of a preferred embodiment of an optical structure according to the present invention.

FIG. 4 is a front view of a preferred embodiment of an optical structure of the present invention.

Fig. 5 is a cross-sectional view taken along a-a in fig. 4.

Fig. 6 and 7 are optical path diagrams of a preferred embodiment of an optical structure according to the present invention.

FIG. 8 is a cross-sectional view of a preferred embodiment of a lamp according to the present invention.

In the figure, 1: a face lens; 10: a lens body; 11: a first side; 111: a center; 112: a pivot part; 12: a second face; 13: a light altering structure; 131: a groove; 132: a protrusion; 14: an annular mounting portion; 100: an optical structure; 110: a focusing lens; 120: a total internal reflection lens; 121: a first light incident surface; 122: a second light incident surface; 123: a first light emitting surface; 124: a second light emitting surface; 125: a total internal reflection surface; 200: a lamp housing; 210: an accommodating space; 300: a light emitting assembly; 310: a light source; 320: the light source is driven.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

Fig. 1-2 show a preferred embodiment of the lens of the present invention. The face lens 1 includes a lens body 10, the lens body 10 having a first face 11 and a second face 12, the first face 11 having a center 111, the first face 11 being provided with a light affecting feature 13. The light changing structure 13 comprises a plurality of grooves 131 and protrusions 132, wherein the grooves 131 and the protrusions 132 are alternately arranged in a circumferential direction of the same radius distance with the center 111 as a center; the grooves 131 and the protrusions 132 are alternately arranged in the same radial direction extending from a position close to the center 111 to a circumferential position with the center 111 as a center. That is, the grooves 131 and the protrusions 132 of the light affecting structure 13 are concentrically arranged on the first surface 11 one by one around the center 111, and the grooves 131 and the protrusions 132 are alternately arranged on the same circle. Between two adjacent circles, the groove 131 is adjacent to the protrusion 132, the groove 131 between two adjacent circles is not adjacent to the groove 131, and the protrusion 132 between two adjacent circles is not adjacent to the protrusion 132. The grooves 131 and the protrusions 132 are alternately arranged on the first surface 11 at intervals in the circumferential direction and the radial direction around the center 111.

The surface lens 1 is used for distributing light and adjusting light of light emitted by a light source, the light enters the surface lens 1 from the first surface 11 or the second surface 12 of the surface lens 1, and the light is refracted and reflected and then emitted from the other surface, so that the light distribution effect of the light is realized. When light is required to be dimmed, two surface lenses 1 are required to be matched for use or the surface lens 1 is required to be matched with other lenses for use, and dimming is performed in a mode of rotating or axially moving the surface lens 1 along the light direction.

The center 111 of the first surface 11 is provided with a pivot joint 112. The surface lens 1 rotates by taking the pivoting part 112 as a rotating shaft, and rotates for dimming, when the two surface lenses 1 are matched for dimming, the pivoting part 112 is used for being in pivoting fit with the other surface lens, the two surface lenses are directly pivoted, and dimming is more accurate.

Further, in the circumferential direction of the same radial distance with the center 111 as the center, the size of the groove 131 is the same, and the size of the protrusion 132 is the same. In the same radial direction extending from the position close to the center 111 to the peripheral position with the center 111 as the center, the size of the groove 131 is proportional to the distance from the groove 131 to the center 111, and the size of the protrusion 132 is proportional to the distance from the protrusion 132 to the center. I.e. the larger the distance from the centre 111, the larger the recess 131 and the larger the projection 132.

Further, the groove 131 and the protrusion 132 are continuously arranged in a circumferential direction of the same radial distance with the center 111 as a center. The grooves 131 and the protrusions 132 are continuously arranged in the same radial direction extending from a position close to the center 111 to a circumferential position with the center 111 as a center. That is, the concave groove 131 and the convex 132 are continuously arranged on the first surface 111, thereby realizing continuity of light distribution.

Further, the lens body 10 is disk-shaped, and an annular mounting portion 14 is provided on the periphery of the lens body 10. The annular mounting portion 14 is used for mounting the surface lens 1, so that the surface lens 1 can rotate around the center 111 to realize the function of rotating dimming.

Further, the second surface 12 of the lens body 10 is set to be a smooth surface. The second face 12 is used for receiving the incident and emergent light, and the smooth face has high light transmittance so that the light can better penetrate through the smooth face.

Referring to fig. 3-5, which illustrate a preferred embodiment of an optical structure 100 according to the present invention, the optical structure 100 includes a focusing lens 110, and the focusing lens 110 includes two surface lenses 1 as described in the above embodiments, wherein the two surface lenses 1 are spaced apart in parallel and the first surfaces 11 of the surface lenses 1 are disposed opposite to each other, and the centers 111 of the two surface lenses 1 are on the same rotation axis and can rotate relatively. When the dimming device is used, one of the two face lenses 1 is set to be fixed, the other one of the two face lenses is set to be rotatable along the center 111, when light needs to be adjusted, the face lenses 1 can be rotated, so that the light is transmitted and refracted between the two face lenses 1, and the dimming effect is achieved.

When the two lenses 1 are oppositely arranged, if the pivot joint portion of one of the lenses is provided with a male pivot joint portion and the other is provided with a female pivot joint portion, the two pivot joint portions 112 are pivotally assembled. If the two side lenses 1 have the same pivot joint 112 structure, an additional pivot joint may be provided to connect the two pivot joints 112.

The optical structure 100 further comprises a total internal reflection lens 120, the total internal reflection lens 120 being spaced apart on one side of the second face 12 of the face lens 1. The tir lens 120 includes a first light incident surface 121, a second light incident surface 122, a first light emitting surface 123, a second light emitting surface 124 and a full reflective surface 125; the second light incident surface 122 is connected to the periphery of the first light incident surface 121; the first light emitting surface 123 is opposite to the first light incident surface 121; the second light emitting surface 124 is connected to the periphery of the first light emitting surface 123; the total reflection surface 125 is connected to the second light incident surface 122 and the second light emitting surface 124, and the total reflection surface 125 is a smooth curved surface surrounding the central axis of the lens. The tir lens 500 is a transparent body surrounded by the first light incident surface 121, the second light incident surface 122, the first light emitting surface 123, the second light emitting surface 124 and the full reflective surface 125, the transparent body is similar to a circular truncated cone structure, the first light incident surface 121 and the second light incident surface 122 form an inward concave light incident cavity, and the first light emitting surface 123 and the second light emitting surface 124 form a horn-shaped light emitting cavity together. In this embodiment, the TIR lens 500 is a prior art TIR lens. The first light emitting surface 123 and the second light emitting surface 124 face the second surface 12 of the surface lens 1 of the focusing lens 110, light emitted by the light source firstly passes through the total internal reflection lens 120 and then enters the second surface 12 of the surface lens 1, and the light is processed by a plurality of lenses to realize light distribution and dimming effects. The light rays are reflected for multiple times in the total internal reflection lens 120, so that the light rays emitted by the light source are homogenized, and the emergent light rays after the light rays pass through the surface lens 1 for angle adjustment are more uniform.

As shown in fig. 6, when the light emitted from the light source 310 is modulated by the optical structure 100, when the groove 131 of one surface lens 1 of the two surface lenses 1 is opposite to the protrusion 132 of the other surface lens 1, and the groove 131 of the upper surface lens 1 is opposite to the protrusion 132 of the lower surface lens 1, the light is emitted perpendicularly from the second surface 12 of the upper lens, and the light irradiation range is small, so that small-angle irradiation is realized. If the emergent angle of the light is enlarged, one of the surface lenses 1 may be rotated by an angle, so that the groove 131 and the protrusion 132 are staggered by an angle, the emergent light is refracted, the emergent angle is enlarged, and the large-angle illumination is realized. As shown in fig. 7, when the concave groove 131 of the upper surface lens 1 faces the concave groove 131 of the lower surface lens 1, the exit angle of the light beam is maximized.

The optical structure 100 of the present invention realizes dimming by rotating one of the two face lenses 1, and since the adjustment uses rotation, the adjustment direction is adjusted along the direction of the tangent plane of the light, which is different from the adjustment structure along the axial direction of the light, the present invention has simple structure and convenient dimming.

As shown in fig. 8, a preferred embodiment of the lamp of the present invention is shown, the lamp includes a lamp housing 200, a light emitting assembly 300 and the optical structure 100 of the above embodiment, the lamp housing 200 is provided with an accommodating space 210 having an opening, the light emitting assembly 300 is assembled in the lamp housing 200, and the optical structure 100 is provided at the opening to distribute and adjust light of light emitted by the light emitting assembly 300. The light emitting assembly 300 includes a light source 310 and a light source driver 320 electrically connected to the light source 310, wherein the light source driver 320 is used to control the light source 320 to be turned on and off, and the light source 310 in this embodiment is a COB light source. In other embodiments, the light source may also not be limited to COB light sources. One of the two face lenses 1 is fixedly installed at the opening of the accommodating space 210 of the lamp body 200, the other is rotatably installed at the opening of the accommodating space 210 of the lamp body 200 along the center 111, and the total internal reflection lens 120 is fixedly installed in the accommodating space 210. When light needs to be adjusted, the surface lens 1 can be rotated, so that the light is transmitted and refracted between the two surface lenses 1, and the dimming effect is realized. The lamp adopting the optical structure 100 has a compact structure because the whole lamp is shortened by adopting rotation for adjustment.

It should be noted that the embodiments of the present invention have been described in terms of preferred embodiments, and not by way of limitation, and that those skilled in the art can make modifications and variations of the embodiments described above without departing from the spirit of the invention.

Claims (10)

1. A face lens, comprising a lens body having a first face and a second face, the first face having a center, the first face having a light altering feature; the light changing structure comprises a plurality of grooves and bulges, wherein the grooves and the bulges are alternately arranged in the circumferential direction of the same radius distance with the center as the circle center; and the grooves and the bulges are alternately arranged in the same radial direction which takes the center as a circle center and extends from the position close to the center to the peripheral position.

2. The surface lens of claim 1, wherein the first surface has a pivot at the center.

3. The surface lens of claim 1, wherein the size of the groove is the same and the size of the protrusion is the same in a circumferential direction of the same radial distance with the center as a center; in the same radial direction extending from the position close to the center to the periphery by taking the center as a circle center, the size of the groove is in direct proportion to the distance from the groove to the center, and the size of the bulge is in direct proportion to the distance from the bulge to the center.

4. The surface lens according to claim 3, wherein said grooves and said protrusions are arranged continuously in a circumferential direction of the same radial distance from said center; and the grooves and the bulges are continuously arranged in the same radial direction which takes the center as the circle center and extends from the position close to the center to the peripheral position.

5. The surface lens of any one of claims 1 to 4, wherein the surface lens body is disc-shaped, and a circumferential edge of the surface lens body is provided with an annular mounting portion.

6. The surface lens of any one of claims 1 to 4, wherein the second surface of the surface lens body is provided as a smooth surface.

7. An optical structure comprising a focus lens comprising two surface lenses according to any one of claims 1 to 6, wherein the two surface lenses are spaced apart in parallel and the first surfaces are disposed opposite to each other, and the centers of the two surface lenses are on the same rotation axis and can rotate relatively.

8. The optical structure of claim 7, further comprising a total internal reflection lens spaced apart on one side of the second face of the face lens.

9. The optical structure of claim 8, wherein the tir lens comprises a first light incident surface, a second light incident surface, a first light emergent surface, a second light emergent surface, and a total reflection surface; the second light incident surface is connected with the periphery of the first light incident surface; the first light emitting surface is opposite to the first light incident surface; the second light-emitting surface is connected with the periphery of the first light-emitting surface; the full-reflecting surface is connected with the second light incident surface and the second light emergent surface and is a smooth curved surface surrounding the central axis of the lens.

10. A lamp comprising a lamp housing, a light-emitting assembly and the optical structure of any one of claims 7 to 9, wherein the lamp housing is provided with a receiving space having an opening, the light-emitting assembly is assembled to the lamp housing, and the optical structure is disposed at the opening.

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