CN103206673B - Total reflection optical component for coupling source of LED (Light Emitting Diode) optical fiber - Google Patents
Total reflection optical component for coupling source of LED (Light Emitting Diode) optical fiber Download PDFInfo
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- CN103206673B CN103206673B CN201310094772.1A CN201310094772A CN103206673B CN 103206673 B CN103206673 B CN 103206673B CN 201310094772 A CN201310094772 A CN 201310094772A CN 103206673 B CN103206673 B CN 103206673B
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- total reflection
- plane
- reflection unit
- distribution element
- light distribution
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Abstract
A total reflection optical component for coupling source of LED (Light Emitting Diode) optical fiber relates to the field of non-imaging LED lighting. The total reflection optical component is formed by machine integration processing and includes N total reflection units which are in rotating symmetric array configuration and are joint sealed with each other through planes, wherein one total reflection unit is configurated at the center of a circle, N-1 total reflection units are uniformly configurated at the circumference of a circle, and N is 4, 5, 6, 7, or 9. The total reflection unit comprises a transmission plane which is in the shape of a convex arc, a small cylindrical surface, a total reflection surface, an outer concave cambered surface, a big cylindrical surface, and an arc surface. An upper edge of the small cylindrical surface is joint sealed with the periphery of the transmission plane, the upper edge of total reflection surface is joint sealed with the lower edge of the small cylindrical surface and the total reflection surface is in the shape of a conical surface, and the transmission plane and the total reflection surface are both free form surfaces. The lower edge of the total reflection surface is joint sealed with the plane, each total reflection surface is joint sealed with six planes, and the arc surface is joint sealed with the lower edge of the big cylindrical surface. The total reflection optical component is high in efficiency for light energy utilization and small in alignment difficulty.
Description
Technical field
The present invention relates to non-imaged technical field of LED illumination, be specifically related to a kind of total reflection light distribution element for the fine coupling light source of LED light.
Background technology
The fine coupling light source of LED light is a kind of device by optical fiber, the light that LED light source sends being propagated into appointed area.Optical fiber has the flexible feature propagated, in theory can light transmition anywhere, meet the diversity of practical application, simultaneously, the conduction of optical fiber to light achieves photodetachment, and this is a qualitative leap, not only increases security performance, and widened the application of optical fibre illumination light source greatly, as fields such as life science, medical applications and machine vision.
At present, because the luminous flux of single LEDs chip is less, after causing being coupled, amount of light is not high, therefore mostly adopts plurality of LEDs integrated chip together as light source, increases the amount of light of coupling light source.As shown in Figure 1, LED light source is when carrying out coupling fiber, first traditional collimation lens 1 is adopted to carry out collimation luminous intensity distribution separately to every LEDs chip, and then adopt a large coupled lens 2 to be totally coupled to the plurality of LEDs chip through collimation, there is two problems in this light-configuration mode: first, traditional collimation lens 1 is adopted to collimate, the light beam of the core that light source O sends can only be controlled, and wide-angle light beam causes waste owing to collecting, seriously reduce the efficiency of light energy utilization; The second, light distribution element is divided into collimation lens 1 and coupled lens 2, and both need quite accurately to coordinate, otherwise easily produces gross error debuging in process, increases resetting difficulty.
Summary of the invention
In order to solve the existing problem that the efficiency of light energy utilization is low, resetting difficulty is large of LED light source being carried out to coupling fiber existence, the invention provides a kind of total reflection light distribution element for the fine coupling light source of LED light.
The technical scheme that the present invention adopts for technical solution problem is as follows:
For the total reflection light distribution element of the fine coupling light source of LED light, this light distribution element adopts mechanical integrated machine-shaping, comprise the N number of total reflection unit in Rotational Symmetry formula array arrangement, every two total reflection unit are all touched by plane, circle centre position is arranged 1 and is totally reflected unit, circumference place is uniformly distributed residue N-1 total reflection unit, N=4,5,6,7 or 9, every two angles be totally reflected between unit be 360 °/(N-1);
Described total reflection unit comprises the transmission plane of outer convex; The small cylindrical surface (3) that top edge and described transmission plane edge touch; Fully reflecting surface together with top edge is closely contacted on described small cylindrical surface lower limb, described transmission plane and fully reflecting surface are rotational symmetric free form surface;
The upper end of described fully reflecting surface lower limb and plane is touched, and each fully reflecting surface all touches with 6 planes;
These lens also comprise the outer cancave cambered surface touched with the lower end of described plane; Be arranged on the great circle cylinder of described outer cancave cambered surface center; The arc surface touched with described great circle cylinder lower limb.
As described N=7,7 total reflection unit are Rotational Symmetry formula array arrangement, and circle centre position is arranged 1 and is totally reflected unit, and circumference place is uniformly distributed 6 total reflection unit, and the angle between every two total reflection unit is 60 °.
The upper end of described plane is semicircular arc face, and lower end is cylindroid.
Touched by cylindroid edges at two ends between described plane.
Angle between described plane is 360 °/(N-1), and N=4,5,6,7 or 9.
The invention has the beneficial effects as follows:
One, the present invention adopts the total reflection unit be made up of transmission plane 4 and fully reflecting surface 5, and all light that can LED light source be utilized completely to send, improve the efficiency of light energy utilization;
Two, collimating structure and luminous intensity distribution unit combine together by the present invention, adopt mechanical integrated machine-shaping, do not need to debug both, reduce resetting difficulty, simultaneously molded processing method, are easy in enormous quantities, low cost processing;
Three, the light that each LED light source in the present invention sends, only through two transmission planes, reduces the Fresnel loss that light produces through multiple transmission plane, is conducive to reducing optical energy loss, improves the efficiency of light energy utilization;
What four, LED light source can send by the present invention couples light in 8mm optical fiber, and coupling efficiency is higher than 50%.
Accompanying drawing explanation
Fig. 1 is the existing knot schematic diagram fine coupling light source of LED light being carried out to coupling luminous intensity distribution;
Fig. 2 is the planar structure schematic diagram of the total reflection light distribution element for the fine coupling light source of LED light of the present invention;
Fig. 3 is the structural representation of total reflection unit;
Fig. 4 is the design principle figure of the transmission plane 4 in total reflection unit;
Fig. 5 is the design principle figure of the fully reflecting surface 5 in total reflection unit;
Fig. 6 is the structural representation of coupled structure;
Fig. 7 is 7 floor map being totally reflected that unit are Rotational Symmetry formula array arrangement;
Fig. 8 is the perspective view of the total reflection light distribution element for the fine coupling light source of LED light of the present invention.
In figure: 1, collimation lens, 2, coupled lens, 3, small cylindrical surface, 4, transmission plane, 5, fully reflecting surface, 6, arc surface, 7, outer cancave cambered surface, 8, great circle cylinder, 9, plane.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail.
As shown in Figure 2, total reflection light distribution element for the fine coupling light source of LED light of the present invention, adopt mechanical integrated machine-shaping, this light distribution element comprises collimating structure and coupled structure, collimating structure is formed by N number of total reflection unit contiguity, N number of total reflection unit is Rotational Symmetry formula array arrangement, namely circle centre position is arranged 1 and is totally reflected unit, all the other N-1 total reflection unit are uniformly distributed at circumference place, angles between every two total reflection unit are 360 °/(N-1), and the number of total reflection unit and arrangement mode and LED chip one_to_one corresponding, total reflection unit forms primarily of transmission plane 4 and fully reflecting surface 5, each total reflection unit comprises a bottom cavity volume be made up of small cylindrical surface 3 and transmission plane 4, a fully reflecting surface 5, the light that each LED chip sends enters in total reflection unit corresponding with it respectively, forming nearly parallel rays enters in coupled structure, transmission plane 4 and fully reflecting surface 5 are rotational symmetric free form surface, nonimaging optics method for designing is adopted to design, as long as find the relation of the tangent plane direction of selecting on curved surface and this some place's emergent ray and incident ray, each point on curved surface can be gone out by iterative, and then obtain the face type of transmission plane 4 and fully reflecting surface 5.
As shown in Figure 7, the collimating structure touched by 7 total reflection unit, 7 total reflection unit are Rotational Symmetry formula array arrangement, and namely circle centre position is arranged 1 and is totally reflected unit, all the other 6 total reflection unit are uniformly distributed at circumference place, and the angle between every two total reflection unit is 60 °.
Coupled structure forms primarily of cambered surface 6 and ring cambered surface 7, and the transmission plane 4 of total reflection unit and fully reflecting surface 5, the cambered surface 6 of coupled structure and ring cambered surface 7 all adopt nonimaging optics method for designing to design.
The refractive index supposing the total reflection light distribution element material therefor in present embodiment is n, and as shown in Figure 4, the design process of transmission plane 4 is as follows: only consider its planar structure, and stereochemical structure rotates around its central symmetry axis and obtains, if the some P on transmission plane 4 on a certain curve
1coordinate be (x
1, z
1), i
1for the angle of incident ray I and x-axis, α
1for a P
1the tangent line T at place
1with the angle of x-axis, θ
cthe incident ray I that can control for transmission plane 4 and the maximum angle of x-axis, at a P
1before get 1 P
1' (x
1-△ x, z
1z), wherein △ x, △ z is very little amount to-△, can think P
1the tangent vector at ' place and P
1the tangent vector at place is identical, some P
1can be regarded as this some place incident ray I and put P
1the intersection point of the tangent line at ' place, then has according to Snell's law:
As long as given starting point P
10(x
10, z
10), through iterating, calculating can obtain each point coordinates on transmission plane 4, and then determines the face type of transmission plane 4.
As shown in Figure 5, the design process of fully reflecting surface 5 is as follows: establish the some P on fully reflecting surface 5 on a certain curve
2coordinate be (x
2, z
2), i
2for incident ray I and x-axis angle, r is the light R of incident ray I after small cylindrical surface 3 reflects and the angle of x-axis, α
2for a P
2the tangent line T at place
2with the angle of x-axis, θ
cthe incident ray I that can control for transmission plane 4 and the maximum angle of x-axis, at a P
2before get 1 P
2' (x
2-△ x, z
2z), wherein △ x, △ z is very little amount to-△, can think P
2the tangent vector at ' place and P
2the tangent vector at place is identical, some P
2can be regarded as this some place light R and P
2the intersection point of the tangent line at ' place, then has according to Snell's law:
As long as given starting point P
20p
2(x
20, z
20), through iterating, calculating can obtain each point coordinates on fully reflecting surface 5, and then determines the face type of fully reflecting surface 5.
As shown in Figure 6, coupled structure forms primarily of cambered surface 6 and ring cambered surface 7, light through the total reflection unit being arranged in circle centre position enters in optical fiber by cambered surface 6, light through other coupled structures enters optical fiber by ring cambered surface 7, cambered surface 6 and ring cambered surface 7 are free form surface, adopt nonimaging optics method for designing to design, design process is similar to transmission plane 4, repeats no more here.
In total reflection light distribution element in present embodiment, adopt the LXML-PWC1-0100 model LED of LUXEON company as light source O, adopt polymethyl methacrylate (PMMA) as light distribution element material, when wavelength is 546.1nm, the refractive index n=1.49 of polymethyl methacrylate (PMMA), this light distribution element diameter D=39mm, thickness H=17mm, the bottom cavity volume diameter d=6mm of each total reflection unit, height h=2.9mm, what sent by LED by this light distribution element is coupled light in 8mm optical fiber, and coupling efficiency is higher than 50%.
Claims (5)
1. for the total reflection light distribution element of the fine coupling light source of LED light, it is characterized in that, this light distribution element adopts mechanical integrated machine-shaping, comprise the N number of total reflection unit in Rotational Symmetry formula array arrangement, every two total reflection unit are all by plane (9) contiguity, and circle centre position is arranged 1 and is totally reflected unit, and circumference place is uniformly distributed residue N-1 total reflection unit, N=4,5,6,7 or 9, every two total reflection unit between angles be 360 °/(N-1);
Described total reflection unit comprises the transmission plane (4) of outer convex; The small cylindrical surface (3) that top edge and described transmission plane (4) edge touch; Fully reflecting surface (5) together with top edge is closely contacted on described small cylindrical surface (3) lower limb, described transmission plane (4) and fully reflecting surface (5) are rotational symmetric free form surface;
The upper end of described fully reflecting surface (5) lower limb and plane (9) is touched, and each fully reflecting surface (5) all touches with 6 planes (9);
This total reflection light distribution element also comprises the outer cancave cambered surface (7) touched with the lower end of described plane (9); Be arranged on the great circle cylinder (8) of described outer cancave cambered surface (7) center; The arc surface (6) touched with described great circle cylinder (8) lower limb.
2. the total reflection light distribution element for the fine coupling light source of LED light according to claim 1, it is characterized in that, as described N=7,7 total reflection unit are Rotational Symmetry formula array arrangement, circle centre position is arranged 1 and is totally reflected unit, circumference place is uniformly distributed 6 total reflection unit, and the angle between every two total reflection unit is 60 °.
3. the total reflection light distribution element for the fine coupling light source of LED light according to claim 1, it is characterized in that, the upper end of described plane (9) is semicircular arc face, and lower end is cylindroid.
4. the total reflection light distribution element for the fine coupling light source of LED light according to claim 3, it is characterized in that, described plane is touched by cylindroid edges at two ends between (9).
5. the total reflection light distribution element for the fine coupling light source of LED light according to claim 4, is characterized in that, the angle between described plane (9) is 360 °/(N-1), N=4,5,6,7 or 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310094772.1A CN103206673B (en) | 2013-03-22 | 2013-03-22 | Total reflection optical component for coupling source of LED (Light Emitting Diode) optical fiber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310094772.1A CN103206673B (en) | 2013-03-22 | 2013-03-22 | Total reflection optical component for coupling source of LED (Light Emitting Diode) optical fiber |
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| Publication Number | Publication Date |
|---|---|
| CN103206673A CN103206673A (en) | 2013-07-17 |
| CN103206673B true CN103206673B (en) | 2015-04-22 |
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|---|---|---|---|
| CN201310094772.1A Expired - Fee Related CN103206673B (en) | 2013-03-22 | 2013-03-22 | Total reflection optical component for coupling source of LED (Light Emitting Diode) optical fiber |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110888209B (en) * | 2019-12-12 | 2021-08-17 | 中国科学院长春光学精密机械与物理研究所 | Total reflection LED optical fiber coupling light distribution element and design method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102537843A (en) * | 2012-01-20 | 2012-07-04 | 中国科学院上海技术物理研究所 | Secondary optical lens module |
| CN102563520A (en) * | 2010-12-31 | 2012-07-11 | 海洋王照明科技股份有限公司 | Flood lens and LED (light-emitting diode) lamp with same |
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2013
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102563520A (en) * | 2010-12-31 | 2012-07-11 | 海洋王照明科技股份有限公司 | Flood lens and LED (light-emitting diode) lamp with same |
| CN102537843A (en) * | 2012-01-20 | 2012-07-04 | 中国科学院上海技术物理研究所 | Secondary optical lens module |
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