CN219243416U

CN219243416U - Free-form surface lens capable of homogenizing light

Info

Publication number: CN219243416U
Application number: CN202223544532.0U
Authority: CN
Inventors: 曹达煜; 刘亮志
Original assignee: South China Normal University
Current assignee: South China Normal University
Priority date: 2022-12-27
Filing date: 2022-12-27
Publication date: 2023-06-23
Anticipated expiration: 2032-12-27

Abstract

The utility model discloses a free-form surface lens for uniform light, which relates to the technical field of lenses and comprises a substrate, wherein a through hole is formed in the center of the substrate in a penetrating way, an outer cover is arranged at the top of the substrate, a reflecting bowl, a micro array lens, a Fresnel lens and an optical lens are sequentially arranged on the inner wall of the outer cover from bottom to top, and the reflecting bowl is arranged between the substrate and the outer cover. According to the utility model, the light source can be comprehensively scattered through the micro array lens, and finally, uniform emission is carried out through the Fresnel lens, so that the illumination dead angle range is greatly reduced, and the light utilization rate is effectively improved.

Description

Free-form surface lens capable of homogenizing light

Technical Field

The utility model relates to the technical field of lenses, in particular to a free-form surface lens for uniform light.

Background

LEDs have become the most popular light source today, and because LEDs have advantages of small size, fast response, energy saving, environmental protection, etc., they are widely used in the fields of road illumination, automotive headlamps, backlight display, etc., and these applications require LEDs with high color uniformity.

However, since the LED is a surface light source, the light emitting angle is small, so that the color uniformity is poor, the irradiated light is glaring, and the light pollution is easy to be caused, and the LED light source cannot be applied to the maximization.

The prior patent (bulletin number: CN 208832383U) proposes a free-form surface optical lens, which comprises a lens and a protective cover, wherein the periphery of the lens is fixedly connected with the protective cover, a base layer is fixedly arranged in the lens, a light-transmitting layer is fixedly connected to the top end of the base layer, a blue light filtering layer is fixedly connected to the top end of the light-transmitting layer, a refraction layer is fixedly connected to the top end of the blue light filtering layer, a concave surface is fixedly arranged at the top end of the refraction layer, an anti-dazzle layer is fixedly connected to the bottom end of the base layer, a transparent bulge is fixedly connected to the bottom end of the anti-dazzle layer, the irradiation area of a light source can be effectively increased, a certain anti-dazzle effect is achieved, the phenomenon of light pollution is not easy to cause, and the lens is practical and suitable for being widely popularized and used.

The free-form surface optical lens has the following disadvantages in use: the light source is concentrated in irradiation, so that the light source is difficult to be uniformly emitted, the illumination angle is limited during irradiation, the light loss is large, the edge illuminance is unclear, the structure is relatively complex, and therefore, the uniform light free-form surface lens is provided for solving the problems.

Disclosure of Invention

The utility model provides a free-form surface lens capable of homogenizing light, which solves the technical problems that the illumination of a light source is concentrated, the light source is difficult to be emitted uniformly, the illumination angle is limited during illumination, the light loss is large, the edge illuminance is unclear, and the structure is relatively complex.

In order to solve the technical problems, the uniform light free-form surface lens provided by the utility model comprises a substrate, a through hole is formed in the center of the substrate in a penetrating manner, an outer cover is arranged at the top of the substrate, a reflecting bowl, a micro array lens, a Fresnel lens and an optical lens are sequentially arranged on the inner wall of the outer cover from bottom to top, and the reflecting bowl is arranged between the substrate and the outer cover.

Preferably, the optical lens comprises a flat mirror, an anti-dazzle layer and an anti-explosion layer, wherein the anti-dazzle layer is arranged on the top surface of the flat mirror, and the anti-explosion layer is arranged on the top surface of the anti-dazzle layer.

Preferably, the optical lens is fixed with the outer cover through gluing.

Preferably, the side wall of the optical lens is provided with a plurality of glue containing grooves.

Preferably, the substrate is made of aluminum, and the thickness of the substrate is 2cm.

Preferably, the outer cover is of a horn-shaped structure with a large upper part and a small lower part, and an aluminum foil is arranged on the inner wall of the outer cover.

Preferably, the incident surface of the micro array lens is a plane, and the emergent surface of the micro array lens is formed by equidistantly arranging a plurality of free curved surfaces with equal amplitude.

Preferably, the plane projection surface of the free curved surface is diamond, square or rectangle.

Compared with the related art, the uniform light free-form surface lens provided by the utility model has the following beneficial effects:

1. according to the utility model, light can be comprehensively scattered through the micro array lens, and finally, uniform emission is carried out through the Fresnel lens, so that the illumination dead angle range is greatly reduced, and the light utilization rate is effectively improved.

2. According to the utility model, the anti-dazzle layer is arranged to enable the flat mirror to absorb ultraviolet rays in light, and the anti-explosion layer is arranged to enable the optical lens to have good anti-explosion performance, so that the overall strength of the optical lens is enhanced, and the lens is protected.

Drawings

FIG. 1 is a schematic diagram of a free-form surface lens configuration for uniform light;

FIG. 2 is a schematic cross-sectional view of a free-form lens with uniform light;

FIG. 3 is a schematic view of the structure of an optical lens in a free-form surface lens for dodging;

fig. 4 is a schematic structural view of a fresnel lens in a free-form surface lens for uniform light.

Reference numerals in the drawings: 1. a substrate; 2. a through hole; 3. an outer cover; 4. a reflective bowl; 5. a micro array lens; 6. a Fresnel lens; 7. an optical lens; 701. a flat mirror; 702. an antiglare layer; 703. an explosion-proof layer; 8. and a glue containing groove.

Detailed Description

Embodiments of the present utility model are described in detail below.

The first embodiment is shown in fig. 1-4, and is a free-form surface lens with uniform light, which comprises a substrate 1, wherein a through hole 2 is formed in the center of the substrate 1 in a penetrating manner, an outer cover 3 is arranged at the top of the substrate 1, a reflecting bowl 4, a micro array lens 5, a fresnel lens 6 and an optical lens 7 are sequentially arranged on the inner wall of the outer cover 3 from bottom to top, the reflecting bowl 4 is arranged between the substrate 1 and the outer cover 3, light can be comprehensively scattered through the micro array lens 5, and finally the light can be uniformly emitted through the fresnel lens 6, so that the illumination dead angle range is greatly reduced, and the light utilization rate is effectively improved.

In the second embodiment, shown in fig. 1-4, a free-form surface lens with uniform light is provided, which comprises a substrate 1, a through hole 2 is formed in the center of the substrate 1, an outer cover 3 is installed at the top of the substrate 1, a reflecting bowl 4, a micro array lens 5, a fresnel lens 6 and an optical lens 7 are sequentially installed on the inner wall of the outer cover 3 from bottom to top, the reflecting bowl 4 is installed between the substrate 1 and the outer cover 3, the optical lens 7 comprises a flat mirror 701, an anti-dazzle layer 702 and an anti-explosion layer 703, the anti-dazzle layer 702 is arranged on the top surface of the flat mirror 701, the anti-explosion layer 703 is arranged on the top surface of the anti-dazzle layer 702, the flat mirror 701 can absorb ultraviolet rays in light through the arranged anti-dazzle layer 702, the optical lens 7 has good anti-explosion performance, the integral strength of the optical lens 7 is enhanced, and the lens is further protected.

In addition, for convenience in fixing the optical lens 7 to the housing 3, the optical lens 7 is fixed to the housing 3 by gluing.

The side wall of the optical lens 7 is provided with the glue containing grooves 8, the glue containing grooves 8 are provided with a plurality of glue, and more glue can be prestored in the glue containing grooves 8 when the glue is adhered, so that the adhesive force between the optical lens 7 and the outer cover 3 is increased, and the installation stability of the optical lens 7 is improved.

In order to make the substrate 1 to be used for more light use made of aluminum, the thickness of the substrate 1 was 2cm.

In order to sufficiently reflect light, the cover 3 has a horn-like structure with a large upper part and a small lower part, and an aluminum foil is attached to the inner wall of the cover 3.

The incident surface of the micro array lens 5 is a plane, the emergent surface of the micro array lens 5 is formed by arranging a plurality of free curved surfaces with equal amplitude equidistance, the overlooking projection surface of the free curved surfaces is diamond, square or rectangle, and the emergent surface of the micro array lens 5 is a free curved surface with equal amplitude equidistance by designing the incident surface of the micro array lens 5 as a plane, so that square light spots with uniform illumination can be formed, and the light spot boundaries are clearly visible.

Working principle: during use, light is injected into the outer cover 3 through the through hole 2, light reflection is carried out through the reflecting bowl 4 arranged in the outer cover 3 and the aluminum foil sheet arranged on the inner wall of the outer cover 3, reflected light passes through the micro array lens 5 to be subjected to light scattering, scattered light passes through the Fresnel lens 6 to be uniformly emitted, the illumination dead angle range is greatly reduced, the light utilization rate is effectively improved, the flat mirror 701 can absorb ultraviolet rays in the light through the arranged anti-dazzle layer 702, the optical lens 7 has good explosion-proof performance through the arranged explosion-proof layer 703, the integral strength of the optical lens 7 is enhanced, and the lens is further protected.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a dodging free-form surface lens, includes base plate (1), its characterized in that, through-hole (2) have been seted up in base plate (1) center department penetration, dustcoat (3) are installed at base plate (1) top, reflective bowl (4), miniature array lens (5), fresnel lens (6) and optical lens (7) are installed in proper order by supreme down to dustcoat (3) inner wall, reflective bowl (4) are installed between base plate (1) and dustcoat (3).

2. The dodging free-form surface lens according to claim 1, wherein the optical lens (7) comprises a flat mirror (701), an antiglare layer (702) and an explosion-proof layer (703), the antiglare layer (702) is disposed on the top surface of the flat mirror (701), and the explosion-proof layer (703) is disposed on the top surface of the antiglare layer (702).

3. A free-form surface lens according to claim 1, characterized in that the optical lens (7) is fixed to the housing (3) by gluing.

4. The dodging free-form surface lens according to claim 1, wherein a glue containing groove (8) is formed in the side wall of the optical lens (7), and a plurality of glue containing grooves (8) are formed.

5. The dodging free-form surface lens according to claim 1, wherein the substrate (1) is made of aluminum, and the thickness of the substrate (1) is 2cm.

6. The dodging free-form surface lens according to claim 1, wherein the outer cover (3) is of a horn-shaped structure with a large upper part and a small lower part, and an aluminum foil is arranged on the inner wall of the outer cover (3).

7. The uniform light free-form surface lens according to claim 1, wherein the incidence surface of the micro array lens (5) is a plane, and the emergent surface of the micro array lens (5) is formed by equidistantly arranging a plurality of free-form surfaces with equal amplitude.

8. The light homogenizing free form surface lens of claim 7, wherein the plane of the free form surface is diamond, square or rectangular.