CN104344343A

CN104344343A - Optical lens and light source module with optical lens

Info

Publication number: CN104344343A
Application number: CN201310338593.8A
Authority: CN
Inventors: 陈庆仲; 王善越
Original assignee: QUANYIDA TECHNOLOGY (FOSHAN) Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: QUANYIDA TECHNOLOGY (FOSHAN) Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2013-08-06
Filing date: 2013-08-06
Publication date: 2015-02-11

Abstract

The invention relates to an optical lens. The optical lens comprises a bottom surface, an incident surface, a top surface, and an outgoing surface, wherein the incident surface is arranged at the middle part of the bottom surface and sunken from the bottom surface to form an accommodation cavity; the incident surface serves as a spherical surface; the top surface is opposite and parallel to the bottom surface; the outgoing surface is arranged at the middle part of the top surface and protrudes from the top surface; the outgoing surface is opposite to the incident surface and serves as a free-form surface which is formed by rotating a curve around an optical axis of the optical lens; the curvature of the curve is larger than or equal to 0.0006 and smaller than or equal to 0.0828. The invention further relates to a light source module with the optical lens.

Description

Optical lens and there is the light source module of this optical lens

Technical field

The present invention relates to optical field, particularly relate to a kind of optical lens and there is the light source module of this optical lens.

Background technology

Utilize its effect of the light fixture of conventional light source substantially can meet the demand of various aspects, but power consumption is too large, therefore light emitting diode (LED, Light Emitting Diode) has as the light source of a new generation the trend replacing conventional light source gradually.

The general installation site of light source module of existing factory building is higher, require that brightness is larger, and uniformity of illuminance is not less than 0.7, thus, easily produces dazzle.Therefore, generally need designs secondary optics element at the exiting surface of light source, for adjusting light characteristic.Existing lens are generally circle, thus the light that light source is sent forms circular light field after lens reflection.But for the factory building light source module that light field is approximate circle symmetry, because its radiation scope is little, and the light intensity distributions of its light field is uneven.

Summary of the invention

In view of this, be necessary to provide a kind of light source module that can make the optical lens of light source uniformly light-emitting and adopt this optical lens.

A kind of optical lens, comprises bottom surface; Incidence surface, to be formed in the middle part of bottom surface and recessed to form an accommodating cavity from bottom surface, and described incidence surface is sphere; End face, it is relative with this bottom surface and be parallel to bottom surface; And exiting surface, it to be formed in the middle part of this end face and protruding from end face, and this exiting surface is relative with incidence surface, and this exiting surface is a free form surface rotated around the optical axis of optical lens by a curve, and this bent curvature of a curve is more than or equal to 0.0006, and be less than or equal to 0.0828.

A kind of light source module comprising lens as above.

The optical lens of embodiment of the present invention and the light source module of employing this kind of optical lens, the light that light source sends is after the incidence surface of optical lens and twice refraction of exiting surface, the light intensity of central authorities' (beam angle is about 0 degree to 30 degree) is more weak, light intensity around increases, thus reaches the object of uniform in light emission.

Accompanying drawing explanation

The schematic perspective view of the optical lens in the light source module that Fig. 1 provides for embodiment of the present invention.

Fig. 2 is the sectional view of light source module along II-II direction in Fig. 1 that optical lens in Fig. 1 coordinates light source composition.

Fig. 3 is the light shape distribution map of the light source module in Fig. 1.

Fig. 4 is the distribution curve flux figure of the light source module in Fig. 1.

Main element symbol description

Light source module	100
		Light source	10
Light-emitting face	11
		Optical lens	20
Bottom surface	21
		End face	22
Incidence surface	23
		Exiting surface	24
Side	25
		Accommodating cavity	26

Following detailed description of the invention will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.

Detailed description of the invention

Refer to Fig. 1 and Fig. 2, the light source module 100 that embodiment of the present invention provides comprises light source 10 and optical lens 20.Described light source 10 is light emitting diode.

This optical lens 20 comprises bottom surface 21, end face 22, incidence surface 23, exiting surface 24 and side 25.In the present embodiment, this bottom surface 21 is parallel to each other with end face 22.The material of this optical lens 20 is high-boron-silicon glass.

Bottom surface 21 profile of this optical lens 20 is a square of leading fillet.End face 22 profile of this optical lens 20 is a square of leading fillet.

This incidence surface 23 to be formed in the middle part of bottom surface 21 and recessed to form an accommodating cavity 26 from bottom surface 21.This incidence surface 23 is sphere.And this centre of sphere O corresponding to incidence surface 23 is through the optical axis O1O2 of this optical lens 20.This incidence surface 23 forms with this joint, bottom surface 21 circle that has the first diameter D1.The curvature of this incidence surface is more than or equal to 0.0006, and is less than or equal to 0.0828.In the present embodiment, the curvature of this incidence surface is 0.0226.

This exiting surface 24 to be formed in the middle part of this end face 22 and protruding from end face 22, and this exiting surface 24 is relative with incidence surface 23, and this exiting surface 24 is a free form surface rotated around the optical axis O1O2 of optical lens 20 by a curve.This bent curvature of a curve is more than or equal to 0.0006, and is less than or equal to 0.0828.In the present embodiment, this exiting surface 24 projects into the circle with Second bobbin diameter D2 on this end face 22, and this first diameter D1 is greater than this Second bobbin diameter D2.

This side 25 to be connected between bottom surface 21 and end face 22 and perpendicular with bottom surface 21.

This light source 10 is oppositely arranged with the incidence surface 23 of this optical lens 20.In the present embodiment, the light-emitting face 11 of light source 10 is coplanar with the bottom surface 21 of this optical lens 20, and this light source 10 is positioned at the optical axis O of this optical lens 20 ₁o ₂on.This light source 10 is spot light.Certainly, this light source 10 also can be arranged in the accommodating cavity 26 of this optical lens 20.

Please also refer to Fig. 3 and Fig. 4, this incidence surface 23 of the light directive optical lens 20 that this light source 10 sends, by the adjustment of this optical lens 20, to make the light intensity of the central authorities of light source 10 (beam angle is about 0 degree to 30 degree) more weak, light intensity around increases, thus reaches the object of uniform in light emission.

Be understandable that, for the person of ordinary skill of the art, the change and distortion that other various picture answers can be made by technical conceive according to the present invention, and all these change the protection domain that all should belong to the claims in the present invention with distortion.

Claims

1. an optical lens, comprising:

Bottom surface;

Incidence surface, to be formed in the middle part of bottom surface and recessed to form an accommodating cavity from bottom surface, and described incidence surface is sphere;

End face, it is relative with this bottom surface and be parallel to bottom surface; And

Exiting surface, it to be formed in the middle part of this end face and protruding from end face, and this exiting surface is relative with incidence surface, and this exiting surface is a free form surface rotated around the optical axis of optical lens by a curve, and this bent curvature of a curve is more than or equal to 0.0006, and be less than or equal to 0.0828.

2. optical lens as claimed in claim 1, it is characterized in that, the curvature of this incidence surface is more than or equal to 0.0006, and is less than or equal to 0.0828.

3. optical lens as claimed in claim 1, it is characterized in that, the curvature of this incidence surface is 0.0226.

4. optical lens as claimed in claim 1, it is characterized in that, this incidence surface and this joint, bottom surface form the circle that has the first diameter, and this exiting surface projects into the circle with Second bobbin diameter on this end face, and this first diameter is greater than this Second bobbin diameter.

5. optical lens as claimed in claim 1, it is characterized in that, described optical lens comprises a side further, and described side to be connected between bottom surface and end face and perpendicular with bottom surface.

6. optical lens as claimed in claim 1, it is characterized in that, the material of described optical lens is high-boron-silicon glass.

7. optical lens as claimed in claim 1, is characterized in that, the centre of sphere corresponding to described incidence surface is through the optical axis of this optical lens.

8. a light source module, it comprises light source and the optical lens as described in claim 1-7.

9. light source module as claimed in claim 8, is characterized in that: described light source is light emitting diode.