DE202012100068U1 - A LENS FOR BUNDLING AND SPREADING THE LIGHT RADIATION - Google Patents

Abstract

A lens for focusing and scattering the light rays, comprising: a lens structure (1) with a flat plate (10), a first convex lens (11) mounted on one side of the flat plate (10), a second convex lens (12), which is mounted on the other side of the flat plate (10), characterized in that the first convex lens (11) extrudes away from one side of the flat plate (10) and the second convex lens (12) away from the other side of the flat plate (10) is extruded; the distance between the apex of the first convex lens (11) and the center of the underside of the first convex lens (11) as a first depth (d11) and the distance between an apex of the second convex lens (12) and the center of the underside of the second convex lens ( 12) is referred to as a second depth (d12), the second depth (d12) being less than half the first depth (d11).

Description

Technical area

The present utility model relates to a lens, in particular a lens for the bundling and scattering of the light beams.

State of the art

Undoubtedly, lighting fixtures are an important and necessary equipment for illuminating rooms in buildings and dark places. This lighting fixture is equipped with a prior art lens for the focusing and scattering of the light beams emitted from the lighting fixture. If the lighting fixture is formed as a spotlight, the prior art lens is designed to bundle the light beams emitted by the lighting fixture. On the other hand, if the lighting fixture is formed as a street lamp, the prior art lens is designed to diffuse the light beams emitted from the lighting fixture. For this reason, the prior art lens plays an important role in this field.

The prior art lens is generally designed as a plano-convex lens and consists of an optical gel. The optical gel is poured into a mold to form the prior art lens by means of an injection molding method or a compression molding method. However, this prior art lens has the following disadvantage:
In injection molding or compression molding of the optical gel, the pressure generated by this injection molding or compression molding is difficult to control in order to form the most satisfactory surface of the lens of the prior art. The surface curvature of the prior art lens is therefore often uneven, so that the light rays are not uniformly refracted with the prior art lens.

Object of the invention

The main object of the present utility model is to provide an improved embodiment of a lens.

In order to achieve the above-described object, a lens for focusing and scattering the light beams is constructed of a lenslet having a flat plate, a first convex lens on one side of the flat plate, and a second convex lens on the other side of the flat plate, the first convex lens being from one side of the flat plate is extruded. The distance between a vertex of the first convex lens and the center of the bottom of the first convex lens is referred to as a first depth, while the distance between the vertex of the second convex lens and the center of the bottom of the second convex lens is referred to as a second depth less than half of the first depth is. The second depth for the most optimal illumination is less than ten percent of the first depth. The curvature of the first convex lens is stronger than that of the second convex lens. A light source is mounted close to the lens assembly, the light source coinciding with the apex of the second convex lens.

Therefore, even if the surface of the first convex lens after injection molding or molding is not perfect and the light beams with the first convex lens can not be uniformly refracted, the light beams may be refracted with the second convex lens for adjustment in advance before these light beams with the first convex lens to get broken.

Brief description of the drawings

The drawings show:

1 shows a perspective view of a lens for the bundling and scattering of the light beams according to the present utility model;

2 shows a side view of the lens for the focusing and scattering of the light rays according to the present utility model;

3 shows a side view illustrating a plurality of light beams to be focused; and

4 shows a side view illustrating the light rays to be scattered.

Ways to carry out the invention

As in the 1 - 3 is a lens for the focusing and scattering of the light beams according to the present utility model of a lens assembly 1 built up. This lens construction 1 consists of a transparent flat plate 10 , The flat plate 10 has a thickness d0. On one side of the flat tile 10 is a first convex lens 11 attached while on the other side of the flat plate 10 a second convex lens 12 is mounted. The first convex lens 11 is from one side of the flat tile 10 extruded while the second convex lens 12 from the other side of the flat tile 10 is extruded. The distance between the apex of the first convex lens 11 and the center of the bottom of the first convex lens 11 is referred to as a first depth d11, while the distance between a vertex of the second convex lens 12 and the center of the bottom of the second convex lens 12 is referred to as a second depth d12. This second depth d12 is less than the first depth d11. The curvature of the first convex lens 11 is stronger than the curvature of the second convex lens 12 , A light source 2 (In this embodiment, an LED is used as the light source) is close to the lens structure 1 assembled. The light source 2 agrees with the apex of the second convex lens 12 match.

The second depth d12 is usually less than half of the first depth d11. In this embodiment, the second depth d12 for the most optimal illumination is less than ten percent of the first depth d11.

Like in the 2 shown, the lens design shows 1 a certain diameter L on. The size of this diameter L is 27.20 millimeters. The width of the thickness d0 of the flat plate 10 is 1.54 millimeters. The distance between the apex of the first convex lens 11 and that of the second convex lens 12 is called the total depth d1, whose width 11 Millimeters.

Like in the 3 Shown are multiple beams of light 3 that from the light source 2 be emitted, with the second convex lens 12 broken and shine directly through the flat plate 10 in the first convex lens 11 when the light source 2 from the apex of the second convex lens 12 is moved away until the distance between the light source 2 and the apex of the second convex lens 12 is seventeen millimeters, which is referred to as the focal length D1. After that, the rays of light 3 with the first convex lens 11 broken in a definite direction to the light rays 3 to bundle. With this principle, the lens structure 1 be used as a spotlight.

Like in the 4 Shown are the rays of light 3 that from the light source 2 be emitted, with the second convex lens 12 broken and shine directly through the flat plate 10 in the first convex lens 11 when the light source 2 to the apex of the second convex lens 12 is moved until the distance between the light source 2 and the apex of the second convex lens 12 6.5 millimeters, which is referred to as diffusion length D2. After that, the rays of light 3 with the first convex lens 11 broken into divergent directions to scatter the rays of light. With this principle, the lens structure 1 be used as a street lamp.

Even if the surface of the first convex lens 11 after injection molding or compression molding is not perfect and therefore the light rays 3 with the first convex lens 11 can not be broken evenly, the second convex lens 12 the rays of light 3 to adjust in advance before breaking these rays of light 3 with the first convex lens 11 to get broken.

LIST OF REFERENCE NUMBERS

1

lens assembly

10

flat plate

11

First convex lens

12

Second convex lens

2

light source

3

beam of light

L

diameter

d0

thickness

d1

total depth

d11

First depth

12

Second depth

D1

focal length

D2

diffusion length

Claims (4)

A lens for focusing and scattering the light rays, comprising: a lens assembly ( 1 ) with a flat plate ( 10 ), a first convex lens ( 11 ) on one side of the flat plate ( 10 ), a second convex lens ( 12 ) on the other side of the flat tile ( 10 ), characterized in that the first convex lens ( 11 ) from one side of the flat plate ( 10 ) extruded away and the second convex lens ( 12 ) from the other side of the flat plate ( 10 ) is extruded away; the distance between the vertex of the first convex lens ( 11 ) and the center of the underside of the first convex lens ( 11 ) as a first depth (d11) and the distance between a vertex of the second convex lens (d11) 12 ) and the center of the bottom of the second convex lens ( 12 ) is referred to as a second depth (d12), wherein the second depth (d12) is less than half of the first depth (d11). The lens for condensing and scattering the light beams according to claim 1, characterized in that the second depth (d12) for the most optimal illumination is less than ten percent of the first depth (d11). The lens for focusing and scattering the light beams according to claim 1 or 2, characterized in that the curvature of the first convex lens ( 11 ) is stronger than the curvature of the second convex lens ( 12 ). The lens for the focusing and scattering of the light beams according to one of claims 1 to 3, characterized in that a light source ( 2 ) close to the lens structure ( 1 ) is mounted and the Light source ( 2 ) with the vertex of the second convex lens ( 12 ) matches.

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