CN201355395Y - Free-form optical lens - Google Patents
Free-form optical lens Download PDFInfo
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- CN201355395Y CN201355395Y CNU2008201693106U CN200820169310U CN201355395Y CN 201355395 Y CN201355395 Y CN 201355395Y CN U2008201693106 U CNU2008201693106 U CN U2008201693106U CN 200820169310 U CN200820169310 U CN 200820169310U CN 201355395 Y CN201355395 Y CN 201355395Y
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Abstract
The utility model relates to a free-form optical lens, which consists of an incident surface, an emergent surface and two pairs of main sides: taking the optical axis as the X axis, an X-Y-Z coordinate system is established; a free-form surface (S1) which is formed by the scan of two curves perpendicular to each other on the X axis is adopted as the emergent surface of the lens, the incident surface of the lens is formed by a basic cylindrical surface, non-cylindrical surfaces taking the X axis as a symmetry axis are adopted as one pair of main sides of the lens, which play a role in total reflection, and inclined planes taking the optical axis as a symmetry axis are adopted as the other pair of sides. The lens not only ensures the length-width ratio and the illuminance uniformity needed by a rectangular light spot but also increases the effective utilization rate of optical energy, and has freedom, flexibility and broad adaptability.
Description
(1) technical field
The utility model relates to a kind of optical lens with free curved surface.
(2) background technology
Along with the LED technology rapid development, the application of LED illumination more and more widely.Particularly road lighting, because characteristics such as LED has efficiently, energy-saving and environmental protection, long service life, the application of street lamp stands in the breach.As everyone knows, the road surface of Ordinary Rd becomes rectangular-shaped, and the formed hot spot in light arrival road surface that general light fixture sends is conglobate.This means that illumination on the xsect of light fixture position is the brightest, the zone is the widest, illumination is the darkest on the xsect of two lamp lockers, the zone is minimum.For reaching the road lighting requirement, can only encrypt the street lamp arrangement.Like this, cause road zone in addition by too much illumination, become invalid illumination and will increase light pollution, this is unfavorable for energy-conserving and environment-protective.For addressing this problem, a kind of optical lens that can form rectangular light spot of our utility model to adapt to various road lighting requirements, reaches purpose energy-saving and cost-reducing, environmental protection.
The optical lens that can form rectangular light spot at present has several, as the described lens of Chinese utility model patent 200710123944.8 " secondary optical lens "; The described lens of China's utility model patent 200710073278.1 " the LED street lamp is lens extremely "; The described lens of China's utility model patent 200710118965.0 " a kind of lens that are used for led light source ", etc.
Though above-mentioned LED lens can both form rectangular light spot, the designed plane of incidence, exit facet are all applied mechanically certain geometric configuration, and this causes the folding of light, the restriction that reflection is subjected to these geometric configuratioies, and part light is gone to non-setting regions, forms optical energy loss.Thereby being necessary to introduce the free form surface notion, folding, the reflection ray of each point reach predetermined requirement on the energy accurate Calculation curved surface.
(3) utility model content
Technical problem to be solved in the utility model is to provide a kind of rectangular light spot length breadth ratio shape and illuminance uniformity of both having guaranteed, can improve effective efficiency of light energy utilization again, reaches the free-form surface lens of optimizing effect.
Described optical lens with free curved surface comprises the plane of incidence, exit facet and two pairs of major opposing sides:
As X-axis, set up the X-Y-Z coordinate system with optical axis;
The exit facet of described lens adopts two free form surfaces that orthogonal curved scanning obtains on X-axis (S1), and these two curve's equation formulas are expressed as X=A respectively
2Z
2+ A
4Z
4+ A
0And X=B
2Y
2+ B
4Y
4+ B
0, A wherein
2=-0.005～-0.003, A
4=-0.0007～-0.0005, A
0=7.0～9.5; B
2=-0.01～0.04, B
4=-0.00045～-0.0003, B
0=7.0～9.5;
The plane of incidence of described lens is made of a basic cylinder (S3), and the equation of this basic cylinder is expressed as X=(R
2-Y
2)
1/2, R=4.0～4.5;
The wherein a pair of major opposing side employing that described lens play the total reflection effect is the non-garden cylinder (S6) of axis of symmetry with the X-axis, and its equation is expressed as X=G
2Z
2+ G
4Z
4+ G
6Z
6+ G
0, another adopts with the optical axis major opposing side is the tapered plane (S7) of axis of symmetry, its equation is expressed as Y=H
1X+H
0G wherein
2=0.130～0.135, G
4=-0.0012～-0.0011, G
6=0.000010～0.000011, G
0=-1.90～-1.80; H
1=-2.0～-1.0, H
0=-5.0～-4.0.
Further, the also additional non-garden cylinder (S4) of the plane of incidence of described lens, non-garden cylinder is made up of three sections curves, and its equation is expressed as X=C respectively
2Y
2+ C
0, (X-D
0)
2+ (Y-E
0)
2=F
0(X-D
0)
2+ (Y+E
0)
2=F
0, C
2=-0.70～-0.40, C
0=5.00～5.30, D
0=3.5～4.0, E
0=0.90～1.0, F
0=0.50～0.51.
Further, in the aforesaid equation:
A
2＝-0.004171429，A
4＝-0.00058069，A
0＝7.79；B
2＝0.016685716，B
4＝-0.000377448，B
0＝7.79；
R＝4.2；
G
2＝0.133485729，G
4＝-0.001172413，G
6＝0.000010435，G
0＝-1.83；H
1＝-1.880726465，H
0＝-4.490482577；
C
2＝-0.634724644，C
0＝5.27876652，D
0＝3.85，E
0＝0.97，F
0＝0.5041。
Further, in the aforesaid equation:
A
2＝-0.004171429，A
4＝-0.00058069，A
0＝7.4914375；B
2＝0.037542861，B
4＝-0.000406483，B
0＝7.4914375；
R＝4.2；
G
2＝0.133485729，G
4＝-0.001172413，G
6＝0.000010435，G
0＝-1.83；H
1＝-1.880726465，H
0＝-4.490482577；
C
2＝-0.634724644，C
0＝5.27876652，D
0＝3.85，E
0＝0.97，F
0＝0.5041。
Further, in the aforesaid equation:
A
2＝-0.004171429，A
4＝-0.00058069，A
0＝9.3373277；B
2＝-0.008342858，B
4＝-0.000377448，B
0＝9.3373277；
R＝4.2；
G
2＝0.160182875，G
4＝-0.001172413，G
6＝0.000010435，G
0＝-1.83；H
1＝-1.07236871，H
0＝4.19；
C
2＝-0.432577192，C
0＝5.04383504，D
0＝3.85，E
0＝0.97，F
0＝0.5041。
The utility model is by rationally being provided with each plane of incidence of described lens, the size separately of four sides and exit facet and mutual alignment size, the item of the expression equation of described each face of choose reasonable reaches every coefficient simultaneously, optimize repeatedly by ray tracing calculating, software emulation, just can accomplish the length breadth ratio shape and the illuminance uniformity that had both guaranteed that rectangular light spot was required to improve effective efficiency of light energy utilization again.Need simultaneously only to represent respectively that to above-mentioned equational certain some parameter suitably adjust, can satisfy the requirement of different user, thereby have freedom and flexibility and adaptability widely.
And, these curved surfaces of being represented by equation can make 3D figure and dot array data, be easy to import numerical control machining center or multiaxis Free-Form Surface Machining equipment and measuring instrument, carry out precision or ultraprecise processing and detection, error is strict controlled in the allowable range.
The plane of incidence of described lens needs accurately to locate with the corresponding physical dimension of LED packaging part, guarantees the center of led chip and the spacing that the optical axis center of described lens overlaps and both maintenances adhere to specification.
For ease of processing, reduce cost and weight reduction, described lens can adopt the optical plastic injection molded, and used optical plastic can be PMMA, PC, ZEONEX etc., the precision required according to described lens, cost performance, thermotolerance is selected for use.
Lens of the present utility model had both guaranteed length breadth ratio shape and the illuminance uniformity that rectangular light spot is required, improved effective efficiency of light energy utilization again, had freedom and flexibility and adaptability widely.
(4) description of drawings
Fig. 1 is the Z-X coordinate two-dimensional structure figure of the utility model embodiment 1 optical lens with free curved surface;
Fig. 2 is the X-Y coordinate two-dimensional structure figure of the utility model embodiment 1 optical lens with free curved surface;
Fig. 3 is the Z-Y coordinate two-dimensional structure figure of the utility model embodiment 1 optical lens with free curved surface;
Fig. 4 is the front view of the optical lens with free curved surface of the utility model embodiment 1;
Fig. 5 is the rear view of the optical lens with free curved surface of the utility model embodiment 1;
Fig. 6 is the light distribution analogous diagram of the utility model embodiment 1;
Fig. 7 is the light distribution analogous diagram of the utility model embodiment 2;
Fig. 8 is the light distribution analogous diagram of the utility model embodiment 3.
(5) embodiment
Below by embodiment the utility model is made preferably specific description, but protection domain of the present utility model is not limited to this.
With reference to Fig. 1～5, a kind of optical lens with free curved surface comprises the plane of incidence, exit facet and two pairs of major opposing sides:
As X-axis, set up the X-Y-Z coordinate system with optical axis;
The exit facet of described lens adopts two free form surface S1 that orthogonal curved scanning obtains on X-axis, and these two curve's equation formulas are expressed as X=A respectively
2Z
2+ A
4Z
4+ A
0And X=B
2Y
2+ B
4Y
4+ B
0, A wherein
2=-0.005～-0.003, A
4=-0.0007～-0.0005, A
0=7.0～9.5; B
2=-0.01～0.04, B
4=-0.00045～-0.0003, B
0=7.0～9.5;
The plane of incidence of described lens is made of a basic cylinder S3, and the equation of this basic cylinder is expressed as X=(R
2-Y
2)
1/2, R=4.0～4.5;
The wherein a pair of major opposing side employing that described lens play the total reflection effect is the non-garden cylinder S6 of axis of symmetry with the X-axis, and its equation is expressed as X=G
2Z
2+ G
4Z
4+ G
6Z
6+ G
0, another adopts with the optical axis major opposing side is the tapered plane S7 of axis of symmetry, its equation is expressed as Y=H
1X+H
0G wherein
2=0.130～0.135, G
4=-0.0012～-0.0011, G
6=0.000010～0.000011, G
0=-1.90～-1.80; H
1=-2.0～-1.0, H
0=-5.0～-4.0.
The also additional non-garden cylinder S4 of the plane of incidence of described lens, non-garden cylinder is made up of three sections curves, and its equation is expressed as X=C respectively
2Y
2+ C
0, (X-D
0)
2+ (Y-E
0)
2=F
0(X-D
0)
2+ (Y+E
0)
2=F
0, C
2=-0.70～-0.40, C
0=5.00～5.30, D
0=3.5～4.0, E
0=0.90～1.0, F
0=0.50～0.51.
The selected item coefficient of present embodiment is:
A
2＝-0.004171429，A
4＝-0.00058069，A
0＝7.79；B
2＝0.016685716，B
4＝-0.000377448，B
0＝7.79；
R＝4.2；
G
2＝0.133485729，G
4＝-0.001172413，G
6＝0.000010435，G
0＝-1.83；H
1＝-1.880726465，H
0＝-4.490482577；
C
2＝-0.634724644，C
0＝5.27876652，D
0＝3.85，E
0＝0.97，F
0＝0.5041。
Inclined-plane S2 equation adopts: z=2.747477419x-14.04194
Inclined-plane S5 equation adopts: z=-0.052407779x+3.5
Referring to Fig. 6, as a kind of light-configuration mode of LED street lamp, vertical (track) largest light intensity angle of these lens is 108 degree; Approximate 3: 1 rectangular light spot can be obtained, the uniform light spots of 35m * 12m can be obtained when also being the high 10m of lamp.
Can realize following index by the free-form surface lens that aforesaid equation constitutes:
Illuminance uniformity (10m 35m * 12m scope at a distance is interior) reaches 50%;
Light extraction efficiency reaches 88.1%;
Effectively the efficiency of light energy utilization (the 10m distant place is in 45m * 45m scope) reaches 79.6%
The coefficient that changes equation among the embodiment 1 is as follows:
A
2＝-0.004171429，A
4＝-0.00058069，A
0＝7.4914375；B
2＝0.037542861，B
4＝-0.000406483，B
0＝7.4914375；
R＝4.2；
G
2＝0.133485729，G
4＝-0.001172413，G
6＝0.000010435，G
0＝-1.83；H
1＝-1.880726465，H
0＝-4.490482577；
C
2＝-0.634724644，C
0＝5.27876652，D
0＝3.85，E
0＝0.97，F
0＝0.5041。
Inclined-plane S2 equation adopts: z=2.747477419x-14.04194
Inclined-plane S5 equation adopts: z=-0.052407779x+3.5
As the another kind of light-configuration mode of LED street lamp, vertical largest light intensity angle of these lens is 120 degree, sees Fig. 7; Approximate 4: 1 rectangular light spot can be obtained, the uniform light spots of 40m * 10m can be obtained when also being the high 10m of lamp.
Can realize following index by the free-form surface lens that aforesaid equation constitutes:
Illuminance uniformity (10m 40m * 10m scope at a distance is interior) reaches 41.3%;
Light extraction efficiency reaches 87.2%;
Effectively the efficiency of light energy utilization (the 10m distant place is in 50m * 50m scope) reaches 71.7%.
The coefficient that changes equation among the embodiment 1 is as follows:
A
2＝-0.004171429，A
4＝-0.00058069，A
0＝9.3373277；B
2＝-0.008342858，B
4＝-0.000377448，B
0＝9.3373277；
R＝4.2；
G
2＝0.160182875，G
4＝-0.001172413，G
6＝0.000010435，G
0＝-1.83；H
1＝-1.07236871，H
0＝-4.19；
C
2＝-0.432577192，C
0＝5.04383504，D
0＝3.85，E
0＝0.97，F
0＝0.5041。
Inclined-plane S2 equation adopts: x=8.15
Inclined-plane S5 equation adopts: z=-0.052407779x+3.5
As a kind of light-configuration mode of LED light fixture, vertical largest light intensity angle of these lens is 74 degree, sees Fig. 8; Approximate 2: 1 rectangular light spot can be obtained, the uniform light spots of 20m * 10m can be obtained when also being the high 10m of lamp.
Can realize following index by the free-form surface lens that aforesaid equation constitutes:
Illuminance uniformity (10m 40m * 10m scope at a distance is interior) reaches 48%;
Light extraction efficiency reaches 87.9%;
Effectively the efficiency of light energy utilization (the 10m distant place is in 45m * 45m scope) reaches 83%.
Claims (5)
1, a kind of optical lens with free curved surface comprises the plane of incidence, exit facet and two pairs of major opposing sides, it is characterized in that:
As X-axis, set up the X-Y-Z coordinate system with optical axis;
The exit facet of described lens adopts two free form surfaces that orthogonal curved scanning obtains on X-axis (S1), and these two curve's equation formulas are expressed as X=A respectively
2Z
2+ A
4Z
4+ A
0And X=B
2Y
2+ B
4Y
4+ B
0, A wherein
2=-0.005～-0.003, A
4=-0.0007～-0.0005, A
0=7.0～9.5; B
2=-0.01～0.04, B
4=-0.00045～-0.0003, B
0=7.0～9.5;
The plane of incidence of described lens is made of a basic cylinder (S3), and the equation of this basic cylinder is expressed as X=(R
2-Y
2)
1/2, R=4.0～4.5;
The wherein a pair of major opposing side employing that described lens play the total reflection effect is the non-garden cylinder (S6) of axis of symmetry with the X-axis, and its equation is expressed as X=G
2Z
2+ G
4Z
4+ G
6Z
6+ G
0, another adopts with the optical axis major opposing side is the tapered plane (S7) of axis of symmetry, its equation is expressed as Y=H
1X+H
0G wherein
2=0.130～0.135, G
4=-0.0012～-0.0011, G
6=0.000010～0.000011, G
0=-1.90～-1.80; H
1=-2.0～-1.0, H
0=-5.0～-4.0.
2, according to the described optical lens with free curved surface of claim 1, it is characterized in that: the also additional non-garden cylinder (S4) of the plane of incidence of described lens, non-garden cylinder is made up of three sections curves, and its equation is expressed as X=C respectively
2Y
2+ C
0, (X-D
0)
2+ (Y-E
0)
2=F
0(X-D
0)
2+ (Y+E
0)
2=F
0, C
2=-0.70～-0.40, C
0=5.00～5.30, D
0=3.5～4.0, E
0=0.90～1.0, F
0=0.50～0.51.
3, according to the described optical lens with free curved surface of claim 2, it is characterized in that in the aforesaid equation:
A
2＝-0.004171429，A
4＝-0.00058069，A
0＝7.79；B
2＝0.016685716，B
4＝-0.000377448，B
0＝7.79；
R＝4.2；
G
2＝0.133485729，G
4＝-0.001172413，G
6＝0.000010435，G
0＝-1.83；H
1＝-1.880726465，H
0＝-4.490482577；
C
2＝-0.634724644，C
0＝5.27876652，D
0＝3.85，E
0＝0.97，F
0＝0.5041。
4, according to the described optical lens with free curved surface of claim 2, it is characterized in that in the aforesaid equation:
A
2＝-0.004171429，A
4＝-0.00058069，A
0＝7.4914375；B
2＝0.037542861，B
4＝-0.000406483，B
0＝7.4914375；
R＝4.2；
G
2＝0.133485729，G
4＝-0.001172413，G
6＝0.000010435，G
0＝-1.83；H
1＝-1.880726465，H
0＝-4.490482577；
C
2＝-0.634724644，C
0＝5.27876652，D
0＝3.85，E
0＝0.97，F
0＝0.5041。
5, according to the described optical lens with free curved surface of claim 2, it is characterized in that in the aforesaid equation:
A
2＝-0.004171429，A
4＝-0.00058069，A
0＝9.3373277；B
2＝-0.008342858，B
4＝-0.000377448，B
0＝9.3373277；
R＝4.2；
G
2＝0.160182875，G
4＝-0.001172413，G
6＝0.000010435，G
0＝-1.83；H
1＝-1.07236871，H
0＝-4.19；
C
2＝-0.432577192，C
0＝5.04383504，D
0＝3.85，E
0＝0.97，F
0＝0.5041。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201693106U CN201355395Y (en) | 2008-11-28 | 2008-11-28 | Free-form optical lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201693106U CN201355395Y (en) | 2008-11-28 | 2008-11-28 | Free-form optical lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201355395Y true CN201355395Y (en) | 2009-12-02 |
Family
ID=41411737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201693106U Expired - Fee Related CN201355395Y (en) | 2008-11-28 | 2008-11-28 | Free-form optical lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201355395Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103003621A (en) * | 2010-07-14 | 2013-03-27 | 恩普乐股份有限公司 | Lighting device |
| CN104696884A (en) * | 2015-02-15 | 2015-06-10 | 广东省工业技术研究院(广州有色金属研究院) | Design method of double-free curved surface LED collimating lens |
-
2008
- 2008-11-28 CN CNU2008201693106U patent/CN201355395Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103003621A (en) * | 2010-07-14 | 2013-03-27 | 恩普乐股份有限公司 | Lighting device |
| CN103003621B (en) * | 2010-07-14 | 2016-08-03 | 恩普乐股份有限公司 | Illuminator |
| CN104696884A (en) * | 2015-02-15 | 2015-06-10 | 广东省工业技术研究院(广州有色金属研究院) | Design method of double-free curved surface LED collimating lens |
| CN104696884B (en) * | 2015-02-15 | 2017-10-20 | 广东省半导体产业技术研究院 | A kind of LED collimation lens design method of pair of free form surface |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091202 Termination date: 20161128 |