CN201836810U - a homogeneous lens - Google Patents

Abstract

A dodging lens comprises a solid transparent body, wherein the body is provided with a light incoming surface and a light outgoing surface, the light incoming surface is parallel to the light outgoing surface, a plurality of convex points are uniformly arrayed on the light incoming surface, and the top surface of each convex point is an arc-shaped convex surface; the light emitted by the area light source consisting of a plurality of point light source arrays is incident into the body from the top surfaces of the salient points, and the arc-shaped top surface of each salient point respectively gathers the incident light to realize uniform light arrangement, so that the light intensity in the illumination area of the area light source is uniformly distributed; and because the light-emitting surface is parallel to the light-entering surface, the light-homogenizing lens does not generate a gathering effect on light rays emitted by the area light source on the whole, so that the illumination area cannot be reduced, and the area light source with uniform light intensity distribution is favorably formed.

Description

a homogeneous lens

technical field

The utility model relates to the technical field of optical lenses, in particular to a uniform light lens.

Background technique

In various optical devices such as optical projection devices, the light source is required to be a surface light source. In actual use, the light source is generally an area light source composed of a plurality of point light source arrays. This kind of area light source is similar to a surface light source, but from a microscopic view, the light emitted by each point light source that makes up the light source is radial, so there are multiple light concentration areas centered on the center of each point light source in the illuminated area, resulting in The internal light intensity distribution is not uniform, so it is necessary to arrange this kind of area light source to form a surface beam with uniform light intensity distribution in the illuminated area.

In existing optical equipment, a condenser lens is generally used to uniformly light the light emitted by an area light source composed of a plurality of point light source arrays. The condenser lens is a convex lens, that is, the light-emitting surface of the lens is convex. The light incident surface of the curved surface covers all point light source distribution ranges of the area light source. The light emitted by each point light source is refracted by the light-emitting surface of the condensing lens and gathered into a light beam. Although this kind of lens has the effect of uniform light finishing by gathering light, but after the light is collected by the convex lens, the illuminated area becomes smaller, which is not conducive to the formation of a surface light source.

Contents of the invention

The purpose of the utility model is to provide a homogenizing lens which can evenly arrange the light emitted by an area light source composed of a plurality of point light source arrays to form a surface light source.

In order to achieve the above object, the utility model adopts the following technical solutions.

A uniform light lens, which includes a solid transparent body, the body is provided with a light incident surface and a light exit surface, the light incident surface is parallel to the light exit surface, and the light incident surface is uniformly arrayed with a plurality of convex points, each convex The top surface of the point is a convex arc surface.

The utility model includes the following further technical solutions.

Wherein, the side surface of each bump is a plane parallel to the optical axis.

Further, the light-emitting surface is also uniformly arrayed with a plurality of bumps.

Wherein, every two adjacent bumps on the light incident surface are in close contact with each other, and every two adjacent bumps on the light output surface are in close contact with each other.

According to the above, the top surface of the bump is a spherical arc surface.

Furthermore, the side edge surface of the body is a surface parallel to the optical axis.

Wherein, the thickness of the body is greater than 5 times the focal length of the bump.

The beneficial effects of the utility model are: the uniform light lens includes a solid transparent body, the body is provided with a light incident surface and a light exit surface, the light incident surface is parallel to the light exit surface, and the light incident surface has a plurality of convex points in a uniform array , the top surface of each bump is a convex arc surface; the light emitted by the area light source composed of a plurality of point light source arrays enters the body from the top surface of the bump, and the arc top of each bump The surface collects the incident light respectively to achieve uniform light finishing, so that the light intensity distribution in the illuminated area of the surface light source is uniform; and because the light output surface is parallel to the light incident surface, the uniform light lens does not affect the light emitted by the area light source as a whole. Gathering effect, so it will not reduce the illuminated area, which is conducive to the formation of a surface light source with uniform light intensity distribution.

Description of drawings

The utility model is further described by using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present utility model.

Fig. 1 is a structural schematic diagram of a uniform light lens of the present invention.

Fig. 2 is a schematic cross-sectional structure diagram of the uniform light lens of the present invention.

Figures 1 and 2 include:

1 - Ontology

11——light incident surface

12——light-emitting surface

13 - side edge surface

2——Bump

21 - top surface

22—side.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figure 1 and Figure 2, the uniform light lens described in the utility model includes a solid transparent body, the body is provided with a light incident surface and a light exit surface, the light incident surface is parallel to the light exit surface, and the light incident surface The surface is uniformly arrayed with a plurality of convex points, and the top surface of each convex point is an outwardly convex arc surface.

The utility model is installed in the optical equipment. During the working process, the light emitted by the area light source composed of a plurality of point light source arrays enters the body from the top surface of the convex point, and the arc-shaped top surface of each convex point is opposite to the The incident light is gathered to achieve uniform light finishing, so that the light intensity distribution in the area illuminated by the surface light source is uniform; and because the light emitting surface is parallel to the light incident surface, the uniform light lens does not produce a gathering effect on the light emitted by the area light source as a whole. Therefore, the illuminated area will not be reduced, which is conducive to forming a surface light source with uniform light intensity distribution.

As shown in FIG. 1 , the side surface of each bump is a plane parallel to the optical axis. This reduces the light loss caused by light refracting out of the bumps through the side faces.

As shown in Figure 2, the light-emitting surface of the utility model also has a plurality of the bumps in a uniform array; then the light passes through each bump on the light-emitting surface for uniform light finishing, and then passes through each of the light-emitting surfaces. The bumps are subjected to secondary uniform light finishing, which further improves the uniform light effect and makes the light intensity distribution in the irradiation area more uniform.

As shown in FIG. 1 , preferably, every two adjacent bumps on the light-incident surface of the present invention are in close contact with each other, and every two adjacent bumps on the light-emitting surface are in close contact with each other. This ensures that the light is collected from the top surface, while the side is parallel to the direction of light propagation, so no light enters and exits, reducing light loss.

Preferably, the top surface of the bump is a spherical arc surface. In this way, the incidence angles of each point of each convex point are different, which further improves the uniform light effect.

Wherein, the side edge surface of the body is a surface parallel to the optical axis. The principle is the same as the above-mentioned principle that the side surfaces of the bumps are parallel to the optical axis, which reduces the light loss caused by light refracted out of the body through the side edge surfaces.

Wherein, the thickness of the body is greater than 5 times the focal length of the bump. In this way, the light beams organized by each bump interfere with each other when propagating in the body, which further improves the uniform light effect.

The above is only a preferred embodiment of the utility model, so all equivalent changes or modifications made according to the structure, features and principles described in the utility model patent application scope are all included in the utility model patent application scope .

Claims (7)

1. A uniform light lens, which comprises a solid transparent body, the body is provided with a light incident surface and a light exit surface, it is characterized in that: the light incident surface is parallel to the light exit surface, and the light incident surface is evenly arrayed with a plurality of Convex points, the top surface of each protruding point is an outwardly convex arc surface. 2. The uniform light lens according to claim 1, characterized in that: the side surface of each of the convex points is a plane parallel to the optical axis. 3. The uniform light lens according to claim 2, characterized in that: the light emitting surface also has a plurality of the bumps in a uniform array. 4 . The uniform light lens according to claim 3 , wherein every two adjacent bumps on the light incident surface are in close contact with each other, and every two adjacent bumps on the light output surface are in close contact with each other. 5. The uniform light lens according to any one of claims 1-4, characterized in that: the top surface of the convex point is a spherical arc surface. 6. The uniform light lens according to claim 5, characterized in that: the side edge surface of the body is a surface parallel to the optical axis. 7. The uniform light lens according to claim 6, characterized in that: the thickness of the body is greater than 5 times the focal length of the bump.