CN201836810U

CN201836810U - Even light lens

Info

Publication number: CN201836810U
Application number: CN2010205839157U
Authority: CN
Inventors: 王心范
Original assignee: DONGGUAN CITY SONGYI ELECTRONIC Co Ltd
Current assignee: DONGGUAN CITY SONGYI ELECTRONIC Co Ltd
Priority date: 2010-10-30
Filing date: 2010-10-30
Publication date: 2011-05-18
Anticipated expiration: 2020-10-30

Abstract

A even light lens comprises a solid transparent body. The body is provided with a light incidence face and a light emission face. The light incidence face is parallel to the light emission face. A plurality of salient points are arrayed on the light incidence face uniformly. The top surface of each salient point is a convex cambered surface. Beams emitted from a regional light source which is formed by arraying a plurality of point light sources enter the body from the top surfaces of the salient points. the cambered top surface of each salient point respectively focuses the incident beams to realize even light arrangement, so that light distribution is uniform within an illumination region of a plane light source. Moreover, because the light emission face is parallel to the light incidence face and the even light lens does not focus the beams emitted by the regional light source on the whole, illumination area is not reduced, thus the plane light source with uniform light distribution is formed.

Description

A kind of even optical lens

Technical field

The utility model relates to the optical lens technical field, particularly a kind of even optical lens.

Background technology

In as multiple optical devices such as apparatus for optical projection, requiring its light source is area source, and in the actual use, its light source is generally the regional light source of being made up of a plurality of spot light arrays.This regional light source is similar to area source, but from microcosmic, the light that each spot light sent of composition light source radially, therefore existing with each spot light center in the light area is a plurality of light concentrated area at center, cause in the light area light distribution inhomogeneous, thereby need put in order this regional light source, to form the uniform face light beam of light distribution in the light area.

In the existing optical device, the general light that uses collector lens that the regional light source of being made up of a plurality of spot light arrays is launched is spared the polishing reason, described collector lens is convex lens, the exiting surface that is lens is the arcwall face of evagination, and its incidence surface covers all spot light distributions of described regional light source.The light of each spot light emission is gathered into light beam through described collector lens exiting surface refraction.Though this lens have played even polishing reason effect by collected light, because behind the planoconvex lens optically focused, the light area diminishes, and is unfavorable for forming area source.

Summary of the invention

The purpose of this utility model is that providing a kind of at the deficiencies in the prior art can spare the polishing reason to the light that the regional light source of being made up of a plurality of spot light arrays is launched, and forms the even optical lens of area source.

For achieving the above object, the utility model adopts following technical proposals.

A kind of even optical lens, it comprises the solid transparent body, and described body is provided with incidence surface and exiting surface, and described incidence surface is parallel to exiting surface, and described incidence surface uniform array has a plurality of salient points, and the end face of each salient point is the arcwall face of evagination.

The utility model comprises following further technical scheme.

Wherein, the side of each described salient point is the face that is parallel to optical axis.

Further, described exiting surface also uniform array a plurality of described salient points are arranged.

Wherein, per two adjacent salient points of described incidence surface are close to mutually, and per two adjacent salient points of described exiting surface are close to mutually.

According to above-described, the end face of described salient point is the arcwall face of dome shape.

Further, the lateral margin face of described body is the face that is parallel to optical axis.

Wherein, the thickness of described body is greater than 5 times of focal lengths of described salient point.

The utility model beneficial effect is: this even optical lens comprises the solid transparent body, described body is provided with incidence surface and exiting surface, described incidence surface is parallel to exiting surface, and described incidence surface uniform array has a plurality of salient points, and the end face of each salient point is the arcwall face of evagination; The light that the regional light source of being made up of a plurality of spot light arrays is launched is from the end face incident body of described salient point, and the arc top surface of each salient point is assembled the light of incident respectively and realized even polishing reason, makes in the light area of area source light distribution even; Because exiting surface is parallel to incidence surface, this even optical lens does not produce congregational rate to the light of regional light emitted on the whole, thereby can not reduce the light area, helps forming the light distribution uniform surface light source again.

Description of drawings

The utility model is described in further detail to utilize accompanying drawing, but the embodiment in the accompanying drawing does not constitute any restriction of the present utility model.

Fig. 1 is the structural representation of even optical lens of the present utility model.

Fig. 2 is the cross-sectional view of even optical lens of the present utility model.

Fig. 1 and Fig. 2 comprise:

1---body

11---incidence surface

12---exiting surface

13---the lateral margin face

2---salient point

21---end face

22---the side.

The specific embodiment

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

See illustrated in figures 1 and 2ly, even optical lens described in the utility model comprises the solid transparent body, described body is provided with incidence surface and exiting surface, described incidence surface is parallel to exiting surface, and described incidence surface uniform array has a plurality of salient points, and the end face of each salient point is the arcwall face of evagination.

The utility model is installed on optical device, in the course of the work, the light that the regional light source of being made up of a plurality of spot light arrays is launched is from the end face incident body of described salient point, the arc top surface of each salient point is assembled the light of incident respectively and is realized even polishing reason, makes in the light area of area source light distribution even; Because exiting surface is parallel to incidence surface, this even optical lens does not produce congregational rate to the light of regional light emitted on the whole, thereby can not reduce the light area, helps forming the light distribution uniform surface light source again.

See shown in Figure 1ly, the side of each described salient point is the face that is parallel to optical axis.Reduced light like this and reflected the light loss consumption that salient point causes via described side.

See shown in Figure 2ly, exiting surface described in the utility model also uniform array has a plurality of described salient points; After then light was spared the polishing reason via each salient point of described incidence surface, each salient point via described exiting surface carried out the even polishing reason of secondary again, has further improved even light effect, makes the interior light distribution of irradiation area more even.

See shown in Figure 1ly, preferably, per two adjacent salient points of incidence surface described in the utility model are close to mutually, and per two adjacent salient points of described exiting surface are close to mutually.This has guaranteed light by the end face collection, and light loss so dull thread is come in and gone out, has been reduced in the parallel sided and the light direction of propagation.

Preferably, the end face of described salient point is the arcwall face of dome shape.The each point incident angle difference of each salient point has further improved even light effect like this.

Wherein, the lateral margin face of described body is the face that is parallel to optical axis.Identical in the principle of optical axis with above-mentioned described salient point parallel sided, this has reduced light and has reflected the light loss consumption that body causes via described lateral margin face.

Wherein, the thickness of described body is greater than 5 times of focal lengths of described salient point.Interfere mutually when the light beam put in order of each salient point is propagated in described body like this, further improved even light effect.

The above only is a better embodiment of the present utility model, so all equivalences of doing according to the described structure of the utility model patent claim, feature and principle change or modify, is included in the utility model patent claim.

Claims

1. even optical lens, it comprises the solid transparent body, and described body is provided with incidence surface and exiting surface, it is characterized in that: described incidence surface is parallel to exiting surface, and described incidence surface uniform array has a plurality of salient points, and the end face of each salient point is the arcwall face of evagination.

2. even optical lens according to claim 1 is characterized in that: the side of each described salient point is the face that is parallel to optical axis.

3. even optical lens according to claim 2 is characterized in that: described exiting surface also uniform array has a plurality of described salient points.

4. even optical lens according to claim 3 is characterized in that: per two adjacent salient points of described incidence surface are close to mutually, and per two adjacent salient points of described exiting surface are close to mutually.

5. according to any described even optical lens of claim 1～4, it is characterized in that: the end face of described salient point is the arcwall face of dome shape.

6. even optical lens according to claim 5 is characterized in that: the lateral margin face of described body is the face that is parallel to optical axis.

7. even optical lens according to claim 6 is characterized in that: the thickness of described body is greater than 5 times of focal lengths of described salient point.