CN103574500A

CN103574500A - Total-reflection light collecting lens

Info

Publication number: CN103574500A
Application number: CN201210255919.6A
Authority: CN
Inventors: 黄国进
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-07-23
Filing date: 2012-07-23
Publication date: 2014-02-12

Abstract

The embodiment of the invention discloses a total-reflection light collecting lens. The total-reflection light collecting lens comprises a lens body, a concave spherical light entering surface is formed on the light entering side of the lens body, and a convex first light exiting surface composed of a plurality of curved surfaces is formed on the light exiting side of the lens body. The outer circumference of the first light exiting surface is provided with a stepped second light exiting surface which enables the thickness of the lens body to be thinned from inside to outside. Therefore, the total-reflection light collecting lens can avoid light source losses, improve light luminous efficiency and further achieve the aims of saving the manufacturing cost and reducing the reject ratio.

Description

Total reflection light collecting lens

Technical field

The present invention relates to a kind of total reflection light collecting lens, refer in particular to a kind of usefulness that can increase ray cast and go out, and can reduce the total reflection light collecting lens of manufacturing cost and product defective products rate.

Background technology

As the optical lens that WO2005/001332A1 disclosed, one side centre at lens body corresponding light source has opening towards the recessed groove of light source, the bottom surface relative with recessed groove opening is by the arc convex surface in the middle of two side direction, and the periphery wall of this lens body be ，Zhi inclined-plane, straight inclined-plane with arc convex surface between (perisporium that refers to recessed groove) with vertical plane, be connected.

After light source luminescent, this optical lens receives ray by arc convex surface, and imports the ray of diffusion with straight inclined-plane and with the joining place of arc convex surface and vertical plane, and then penetrates and to external diffusion from the exiting surface of optical lens.

Yet, when light enters this optical lens by vertical plane, because the relation that medium changes, can produce refracted ray and part total reflection light at vertical plane, and refracted ray produces reflection ray via straight ramp effect again, reflection ray is penetrated and is projected away by exiting surface again, the situation that this light transmits, cause light source to inject the decay of the light intensity of optical lens, reduce the penetrating light intensity be refracted to exiting surface, and projection and the light that goes out is inhomogeneous, brightness is also unequal; In addition, this optical lens is a solid, and the transmission of light in entity is easily attenuated, so cause the light extraction efficiency of this optical lens poorer.

Summary of the invention

Main purpose of the present invention, is can avoid light source loss, improving extraction efficiency for providing a kind of, and further reaches the object total reflection light collecting lens that reduces manufacturing cost and defective products rate.

The main purpose of the invention described above and effect, by following concrete technological means, reached:

A kind of total reflection light collecting lens, there is a lens body, the light inlet side of this lens body forms the incidence surface of an interior concave spherical surface, the first exiting surface that the bright dipping side of this lens body forms an evagination and consists of a plurality of curved surfaces, is provided with and makes the wall thickness of lens body by interior stepped the second exiting surface that is outward attenuation gradually in the outer peripheral edges of this first exiting surface.

Wherein, on this first exiting surface, be formed with cross one another X axis crest line and Y-axis crest line, and therefore exiting surface is marked off to the first ~ tetra-region curved surface (being docile and obedient clockwise), wherein, on X axis crest line, the Y-axis curvature of any 2 is all identical, on Y-axis crest line, the X axis curvature of any 2 is all identical, and X axis curvature and Y-axis curvature in each the first ~ tetra-region curved surface is identical or not identical numerical value, position is first again, X axis crest line between two region curved surfaces or the 3rd, between the X axis crest line between four region curved surfaces and X-axis, there is an angle theta, angle theta angle is between 0 ~ 30 degree.

The total reflection light collecting lens of the embodiment of the present invention, can avoid light source loss, improving extraction efficiency, and can further reduce manufacturing cost and fraction defective.

Accompanying drawing explanation

Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, does not form limitation of the invention.In the accompanying drawings:

Fig. 1 is the sectional axonometric drawing of light collecting lens of the present invention;

Fig. 2 is the first exiting surface schematic diagram of light collecting lens of the present invention;

Fig. 3 is the perspective schematic top plan view of light collecting lens of the present invention;

Fig. 4 is the perspective schematic side view of light collecting lens of the present invention;

Fig. 5 is the ray cast schematic diagram of one embodiment light collecting lens of the present invention;

Fig. 6 is the A-A direction cutaway view of Fig. 5;

Fig. 7 is the ray cast schematic diagram of the light collecting lens of its two embodiment of the present invention;

Fig. 8 is the B-B direction cutaway view of Fig. 7.

Drawing reference numeral:

1 lens body

11 incidence surfaces

12 first exiting surfaces

121 ~ 124 the first ~ tetra-region curved surfaces

13 second exiting surfaces

14 reflectings surface

The axial crest line of 15X

The axial crest line of 16Y

2 light sources

The specific embodiment

For the technology contents, the goal of the invention that make the present invention use and the effect reached thereof have more complete and clearly disclose, hereby in lower detailed description it, and see also taken off graphic and figure number.

Please refer to the drawing 1 is the sectional axonometric drawing of total reflection light collecting lens of the present invention.Total reflection light collecting lens of the present invention has a lens body 1, and defining this lens body 1 is that the side entering for light source is light inlet side, and the side that light source leaves is bright dipping side.Wherein, the light inlet side of this lens body 1 has an incidence surface 11 that is interior concave spherical surface, the first exiting surface 12 that its bright dipping side forms an evagination and consists of at least two curved surfaces, and be connected the outer peripheral edges of this first exiting surface 12 and the wall thickness of this lens body 1 by the second exiting surface 13 of interior stepped attenuation outward gradually, between the outer rim of the second exiting surface 13 outer most edge and incidence surface 11, be connected a reflecting surface 14, this reflecting surface 14 is a single-curved surface or multiple camber or free form surface again.

Below please remerge and consult Fig. 2 ~ Fig. 4.Wherein, be formed with cross one another X axis crest line 15 and Y-axis crest line 16 on this first exiting surface 12, this cross one another X axis crest line 15 and Y-axis crest line 16 are docile and obedient whole the first exiting surface 12 to clockwise and are marked off the first ~ tetra-region curved surface 121 ~ 124; Wherein, first and second region curved surface 121,122 shares X axis crest line 15, first, fourth region curved surface 121,124 shares Y-axis crest line 16, and second and third region curved surface 122,123 shares Y-axis crest line 16, and third and fourth region curved surface 123,124 shares X axis crest line 15; The Y-axis curvature YK of any 2 p, q all identical (YpK=YqK) on X axis crest line 15 again, the X axis curvature XK of any 2 r, s all identical (XrK=XsK) on Y-axis crest line 16, and X axis curvature X1 ~ 4K in each the first ~ tetra-region curved surface 121 ~ 124 is for equating or unequal, Y-axis curvature Y1 ~ 4K in each the first ~ tetra-region curved surface 121 ~ 124 is also for equal or unequal, so that this first exiting surface 12 forms hyperboloid or multiple camber design simultaneously.

In addition, the present invention more can further utilize this light collecting lens first, the variation of the curvature of ~ tetra-region curved surfaces 121 ~ 124, adjust light that light source 2 sends and penetrating light collecting lens of the present invention outwards projection and the cross sectional shape of formed light beam after going out.

Please refer to the drawing 5, Fig. 6, in the present embodiment, the first exiting surface 12 of this light collecting lens is to adopt bi-curved design, this reflecting surface 14 is the design that adopts multiple camber, therefore, when the light of light source 2 generations enters light collecting lens by incidence surface 11, most light directly goes out through the first exiting surface 12 projections, because the first exiting surface 12 is to adopt bi-curved design, the light therefore project will produce relative light shape according to its curved surface, the light that small part goes out without the first exiting surface 12 projections is by being gone out by stair-stepping the second exiting surface 13 projections after the multiple camber reflection of reflecting surface 14, to make the effective sunlight that this light source 2 sends go out by light collecting lens of the present invention concentrated projection totally, promote the light extraction efficiency of this light collecting lens.

Please refer to the drawing 7, Fig. 8, in the present embodiment, the first exiting surface 12 of this light collecting lens is to adopt bi-curved design equally, this reflecting surface 14 is the design that adopts free form surface; When the light of light source 2 enters light collecting lens by incidence surface 11, most light directly projects and goes out through the first exiting surface 12, the light of small part is by being gone out by stair-stepping the second exiting surface 13 projections after the multipath reflection face reflection of reflecting surface 14 again, make the effective sunlight that light source 2 sends by light collecting lens of the present invention, concentrate projection to go out totally, reach the object of the light extraction efficiency that promotes this light collecting lens.

Via the optical lens described in the known light collecting lens of the present invention of above implementation and prior art, at least have advantages of following listed:

1. light collecting lens of the present invention is by recessed incidence surface, the design that is at least bi-curved the first exiting surface and adopts the reflecting surface of single-curved surface, multiple camber or free form surface, make to enter the light of this light collecting lens, a part can directly be projected away by total concentrating through bi-curved the first exiting surface, a part reflects away through adopting the reflecting surface of single-curved surface, multiple camber or free form surface, reaches the effect that all light is all concentrated and projected.

2. light collecting lens of the present invention is because of the outer peripheral edges place of the first exiting surface from being connected, the wall thickness that makes this lens body by interior stepped attenuation outward gradually to form the design of the second exiting surface, make this light collecting lens become a hollow-core construction body, and shorten by this path that light is advanced in entity, to reduce the loss of light.And because so, can reduce the use of raw material, reduce costs, and the shrink phenomenon while further reducing moulding, improving product yields.

3. first exiting surface of light collecting lens of the present invention because being formed with evagination and being formed by least two curved surfaces in bright dipping side, therefore, light collecting lens of the present invention can pass through the design aspect of the curved surface of this first exiting surface, produce different light shapes, with the occasion demand in response under different situations, make the range of application of this light collecting lens more broad.

Above is only part embodiment of the present invention for person, not in order to limit the present invention, causes according to intention spirit of the present invention and feature, and the modifications person of forming a little, within also should being included in this patent scope.

In sum, the embodiment of the present invention really can reach desired use effect, its disclosed concrete technological means again, not only be not seen in like product, be not also disclosed in before application, really met regulation and the requirement of Patent Law completely, therefore propose the application of patent of invention in accordance with the law, earnestly ask and give examination, and grant quasi patent, true feeling moral just.

Claims

1. a total reflection light collecting lens, is characterized in that, the side that definition enters for light source is light inlet side, and the side that light source leaves is bright dipping side; At described light inlet side place, there is an incidence surface that is interior concave spherical surface, the first exiting surface that described bright dipping side place is formed with an evagination and consists of hyperboloid or multiple camber, and be connected the outer peripheral edges of described the first exiting surface and the wall thickness of described lens body by the second exiting surface of interior stepped attenuation outward gradually, between the outer rim of described the second exiting surface and the outer rim of described incidence surface, be connected a reflecting surface.

2. total reflection light collecting lens as claimed in claim 1, is characterized in that, described reflecting surface be a single-curved surface, multiple camber or free form surface one of them.

3. total reflection light collecting lens as claimed in claim 1, it is characterized in that, on described the first exiting surface, be formed with cross one another X axis crest line and Y-axis crest line, described cross one another X axis crest line and Y-axis crest line are docile and obedient whole the first exiting surface to clockwise and are marked off the first ~ tetra-region curved surface; Wherein, first and second region curved surface shares described X axis crest line, and first, fourth region curved surface shares described Y-axis crest line, and second and third region curved surface shares described Y-axis crest line, and third and fourth region curved surface shares described X axis crest line; On described X axis crest line, the Y-axis curvature of any 2 is all identical again, and on described Y-axis crest line, the X axis curvature of any 2 is all identical, and X axis curvature in each the first ~ tetra-region curved surface equates; Or unequal; Y-axis curvature in each the first ~ tetra-region curved surface equates; Or unequal; So that described the first exiting surface is hyperboloid or multiple camber.