CN102679266A - Implement method for light-emitting diode (LED) secondary light distribution lens capable of obtaining evenly distributed rectangular light spots - Google Patents
Implement method for light-emitting diode (LED) secondary light distribution lens capable of obtaining evenly distributed rectangular light spots Download PDFInfo
- Publication number
- CN102679266A CN102679266A CN2011100644749A CN201110064474A CN102679266A CN 102679266 A CN102679266 A CN 102679266A CN 2011100644749 A CN2011100644749 A CN 2011100644749A CN 201110064474 A CN201110064474 A CN 201110064474A CN 102679266 A CN102679266 A CN 102679266A
- Authority
- CN
- China
- Prior art keywords
- light
- rectangular
- lens
- led
- distribution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention discloses an implement method for a light-emitting diode (LED) secondary light distribution lens capable of obtaining evenly distributed rectangular light spots. The implement method includes determining the distribution of light of an LED light source which is required for light distribution design; determining an illumination rectangular area and the distance between the light source and the illumination area; determining a lens material; dividing the rectangular area into a plurality of line segments which pass through the center of the rectangle; establishing and obtaining the one-to-one correspondence relation between any point on the line segments and an emergence angle of the light source on the basis of the law of conservation of energy; and solving a light distribution curved surface of the light distribution lens on the basis of the refraction law and the correspondence relation. According to the implement method for the LED secondary light distribution lens capable of obtaining the evenly distributed rectangular light spots, the secondary light distribution of an LED is achieved, the light spots are rectangular after the light distribution, and the light is evenly distributed.
Description
Technical field
Application Optics technical field of the present invention, the implementation method of the equally distributed LED secondary light-distribution lens of particularly a kind of rectangular hot spot.
Background technology
Along with the development trend of low-carbon energy-saving, environmental protection, light emitting diode (LED) has obtained concern more and more widely with plurality of advantages such as its low energy consumption, high-luminous-efficiency and life-span length.LED is applied in all kinds of illuminators as a kind of novel light source more and more.Yet also there is urgent problem in the LED lamp from general lighting.Because the volume of LED lamp is little, makes its light-emitting area little, high directivity, so irradiated area is limited, need carry out secondary light-distribution to it, to satisfy actual needs.
The method that is applied to luminous intensity distribution at present has two kinds: reflecting type light distribution and refraction type luminous intensity distribution.Reflecting type light distribution utilizes total reflection principle, makes the light-distribution lens side become fully reflecting surface, with the whole reflected back lens of the light that shines this side, thereby reduces the loss of ambient light energy, improves the efficiency of light energy utilization.Yet the directionality of LED lamp is single, and main luminous energy concentrates on mid portion, only the side is designed, and can not make the most luminous energy that concentrate on mid portion be evenly distributed to the target illumination zone, thereby can not satisfy inhomogeneity requirement.
The refraction type luminous intensity distribution then adopts the lens refraction principle, can effectively the luminous energy that concentrates on mid portion be distributed to the target illumination zone.The implementation method of refraction type luminous intensity distribution mainly contains two kinds at present: two-dimensional design and three dimensional design.Two-dimensional design is the front surface and the both direction separately design of surface, back at quadrature with secondary light-distribution lens; Superpose then, though the realization easily of such method only has been directed against two cross lines and has designed; Other most site errors are bigger, and the uniformity of whole lens is relatively poor.
The conventional three-dimensional design then need be set up the one-to-one relationship in whole refraction curved surface and target illumination zone, carries out the pointwise design, and is better through the lens uniformity that this method obtains, but the design process more complicated is difficult for realizing.
Summary of the invention
The technical problem that (one) will solve
In view of this; The technical problem that the present invention will solve is: overcome the deficiency of existing two-dimensional design and the complexity of three dimensional design; The implementation method of the equally distributed LED secondary light-distribution lens of a kind of rectangular hot spot is provided, the three dimensional design of lens curved surface is resolved into several two-dimensional design, realized the secondary light-distribution of LED lamp; Hot spot is rectangular, and the light of whole rectangular area is evenly distributed.
(2) technical scheme
For achieving the above object, the invention provides the implementation method of the equally distributed LED secondary light-distribution lens of a kind of rectangular hot spot, comprising:
Step 1:, confirm the light distribution function I (θ) of led light source according to the led light source data that provides;
Step 2: confirm the long a of rectangular target field of illumination according to concrete needs, wide b, light source is from the distance h of field of illumination;
Step 3:, confirm the refractive index n of lens material according to lens material;
Step 4: the rectangular target field of illumination is divided into some line segments of crossing rectangular centre; Line segment length satisfy formula
wherein
be the angle that the line segment of rectangular centre is become with the long limit a of rectangle,
Step 5: according to law of conservation of energy; Establishment step 4 obtains the one-to-one relationship that line segment
is gone up any point
and light source angle of emergence θ; Its relation is like formula ∫ I (θ) d θ=∫ Ad ρ; Wherein ρ is the distance of point
and rectangular centre, and A is the average illumination value in target illumination zone;
Step 6: obtain according to formula in formula and the step 5 in the step 4
With any point on the target illumination rectangle
Corresponding relation, and the law of refraction and geometrical relationship are found the solution light distribution curved surface; The lens front surface is a sphere, makes light normal incidence get into lens, reduces reflection loss; Relation formula nsin (β+α)=sin (β+θ is satisfied on back surface
Out), wherein tan β does
Curve on the direction exists
The slope of direction, θ
OutFor the surperficial emergent ray in back exists
The angle of emergence of direction.
In the such scheme, the led light source distribution function I (θ) described in the step 1 is rotational symmetric.
In the such scheme, the rectangular target field of illumination described in the step 2 be shaped as planar rectangular, led light source is positioned at this h place, top, planar rectangular center.
In the such scheme, the lens material described in the step 3 is light transmissive material PMMA or glass.
In the such scheme; Line segment described in the step 4
is crossed rectangular centre, and line segment length satisfies formula
In the such scheme, any point on the target illumination zone described in the step 5
satisfies formula ∫ I (θ) d θ=∫ Ad ρ with light source angle of emergence θ.
In the such scheme, the front surface of the secondary light-distribution lens described in the step 6 is a sphere, and formula nsin (β+α)=sin (β+θ is satisfied on back surface
Out).
(3) beneficial effect
The present invention's advantage compared with prior art is:
1, the present invention adopts refraction type light-distribution lens implementation method, utilizes law of conservation of energy to set up point and the one-to-one relationship of the led light source angle of emergence in the target illumination rectangular area, thereby makes the light distribution in the field of illumination have good uniformity.
2, customer service of the present invention the bigger shortcoming of error in the present two-dimensional design, make the two-dimensional design of having only two orthogonal directions become multidirectional two-dimensional design to whole lens curved surface, solved the design error in the quadrature two-dimensional design.
3, the present invention compares with the design of conventional three-dimensional luminous intensity distribution, and three-dimension curved surface has been resolved into many two-dimensional curves, greatly reduces design difficulty, can obtain simultaneously and the identical uniformity of conventional three-dimensional luminous intensity distribution design.
Description of drawings
Fig. 1 is that wherein 1 is the back surface of being designed according to the structural representation of the LED secondary light-distribution lens of the present invention's realization, and 2 is spherical front surface, and 3 is the led light source position;
Fig. 2 is the front view of spherical anterior surface in the LED secondary light-distribution lens of realizing according to the present invention;
Fig. 3 is the front view on surface, spherical back in the LED secondary light-distribution lens of realizing according to the present invention;
Fig. 4 is for before adding secondary light-distribution lens, the circular light spot of led light source;
Fig. 5 is for after adding secondary light-distribution lens, the rectangular light spot that obtains.
The specific embodiment
For making the object of the invention, technical scheme and advantage clearer, below in conjunction with specific embodiment, and with reference to accompanying drawing, to further explain of the present invention.
The implementation method of the equally distributed LED secondary light-distribution lens of this rectangular hot spot provided by the invention comprises the steps:
Step 1:, confirm that the light distribution function of led light source satisfies relation: I (θ)=80*cos according to the led light source data that provides
2θ;
Step 2: confirm the long a=30m of rectangular target field of illumination as required, wide b=16m, light source is from the distance h=10m of field of illumination;
Step 3: the selection lens material is PMMA, the refractive index n of this material=1.49;
Step 4: the rectangular illumination zone is divided into some line segments of crossing rectangular centre; Line segment length satisfy formula
wherein
be the angle that the line segment of rectangular centre is become with the long limit a of rectangle,
be
in the present embodiment
Step 5: ∫ I (θ) d θ=∫ Ad ρ by formula, set up the one-to-one relationship that line segment
is gone up any point
and the led light source angle of emergence
; Wherein ρ is the distance of point
and rectangular centre, and A is the average illumination value in target illumination zone;
Step 6: concern substitution formula nsin (β+α)=sin (β+θ with what step 5 obtained
Out), solve light distribution curved surface in difference
The slope tan β of direction, thus drawn the data on surface behind the whole lens of luminous intensity distribution effect, generate the lens entity at last.Behind the lens that obtain among face shape such as the Fig. 1 on surface 1 with shown in Figure 3, the lens front surface is a sphere, as among Fig. 12 with shown in Figure 2, led light source is positioned at centre of sphere place, shown among Fig. 13, light gets into lens in front surface normal incidence, reduces reflection loss.
Step 7: the lens that step 6 is obtained and the led light source of step 1 are assembled; It is as shown in Figure 5 to obtain light spot shape; And the light spot shape that does not add naked lamp before the lens is circular (like Fig. 4); Can find out that the LED secondary light-distribution lens of realizing by the present invention can obtain rectangular light spot, and illuminance distributes evenly in the rectangular area.
Above-described specific embodiment; The object of the invention, technical scheme and beneficial effect have been carried out further explain, and institute it should be understood that the above is merely specific embodiment of the present invention; Be not limited to the present invention; All within spirit of the present invention and principle, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. the implementation method of the equally distributed LED secondary light-distribution lens of rectangular hot spot is characterized in that, comprising:
Step 1:, confirm the light distribution function I (θ) of led light source according to the led light source data that provides;
Step 2: confirm the long a of rectangular target field of illumination according to concrete needs, wide b, light source is from the distance h of field of illumination;
Step 3:, confirm the refractive index n of lens material according to lens material;
Step 4: the rectangular target field of illumination is divided into some line segments of crossing rectangular centre; Line segment length satisfy formula
wherein
be the angle that the line segment of rectangular centre is become with the long limit a of rectangle,
Step 5: according to law of conservation of energy; Establishment step 4 obtains the one-to-one relationship that line segment
is gone up any point
and light source angle of emergence θ; Its relation is like formula ∫ I (θ) d θ=∫ Ad ρ; Wherein ρ is the distance of point
and rectangular centre, and A is the average illumination value in target illumination zone;
Step 6: obtain according to formula in formula and the step 5 in the step 4
With any point on the target illumination rectangle
Corresponding relation, and the law of refraction and geometrical relationship are found the solution light distribution curved surface; The lens front surface is a sphere, makes light normal incidence get into lens, reduces reflection loss; Relation formula nsin (β+α)=sin (β+θ is satisfied on back surface
Out), wherein tan β does
Curve on the direction exists
The slope of direction, θ
OutFor the surperficial emergent ray in back exists
The angle of emergence of direction.
2. the implementation method of the equally distributed LED secondary light-distribution lens of rectangular hot spot according to claim 1 is characterized in that, the led light source distribution function I (θ) described in the step 1 is rotational symmetric.
3. the implementation method of the equally distributed LED secondary light-distribution lens of rectangular hot spot according to claim 1 is characterized in that, the rectangular target field of illumination described in the step 2 be shaped as planar rectangular, led light source is positioned at this h place, top, planar rectangular center.
4. the implementation method of the equally distributed LED secondary light-distribution lens of rectangular hot spot according to claim 1 is characterized in that the lens material described in the step 3 is light transmissive material PMMA or glass.
5. the implementation method of the equally distributed LED secondary light-distribution lens of rectangular hot spot according to claim 1; It is characterized in that; Line segment described in the step 4
is crossed rectangular centre, and line segment length satisfies formula
6. the implementation method of the equally distributed LED secondary light-distribution lens of rectangular hot spot according to claim 1; It is characterized in that any point on the target illumination zone described in the step 5
satisfies formula ∫ I (θ) d θ=∫ Ad ρ with light source angle of emergence θ.
7. the implementation method of the equally distributed LED secondary light-distribution lens of rectangular hot spot according to claim 1 is characterized in that the front surface of the secondary light-distribution lens described in the step 6 is a sphere, and formula nsin (β+α)=sin (β+θ is satisfied on back surface
Out).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100644749A CN102679266A (en) | 2011-03-17 | 2011-03-17 | Implement method for light-emitting diode (LED) secondary light distribution lens capable of obtaining evenly distributed rectangular light spots |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100644749A CN102679266A (en) | 2011-03-17 | 2011-03-17 | Implement method for light-emitting diode (LED) secondary light distribution lens capable of obtaining evenly distributed rectangular light spots |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102679266A true CN102679266A (en) | 2012-09-19 |
Family
ID=46811595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100644749A Pending CN102679266A (en) | 2011-03-17 | 2011-03-17 | Implement method for light-emitting diode (LED) secondary light distribution lens capable of obtaining evenly distributed rectangular light spots |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102679266A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104501091A (en) * | 2014-12-26 | 2015-04-08 | 成都恒坤光电科技有限公司 | Design method for LED (Light Emitting Diode) secondary light distribution lens with illuminance being in Gaussian distribution |
| CN104879711A (en) * | 2015-06-02 | 2015-09-02 | 江南大学 | Design method of double-free-form-surface LED (light emitting diode) uniform-light lens based on cubic spline |
| CN108870318A (en) * | 2018-05-21 | 2018-11-23 | 广东工业大学 | A kind of LED free-form surface lens design method |
| CN111536439A (en) * | 2020-04-30 | 2020-08-14 | 中国科学院西安光学精密机械研究所 | Lamp capable of realizing rectangular uniform illumination, lamp set and lampshade structure optimization method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975370A (en) * | 2010-11-01 | 2011-02-16 | 上海铭源光源发展有限公司 | Design method of secondary light distribution lens for LED light source |
-
2011
- 2011-03-17 CN CN2011100644749A patent/CN102679266A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975370A (en) * | 2010-11-01 | 2011-02-16 | 上海铭源光源发展有限公司 | Design method of secondary light distribution lens for LED light source |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104501091A (en) * | 2014-12-26 | 2015-04-08 | 成都恒坤光电科技有限公司 | Design method for LED (Light Emitting Diode) secondary light distribution lens with illuminance being in Gaussian distribution |
| CN104879711A (en) * | 2015-06-02 | 2015-09-02 | 江南大学 | Design method of double-free-form-surface LED (light emitting diode) uniform-light lens based on cubic spline |
| CN104879711B (en) * | 2015-06-02 | 2017-11-24 | 江南大学 | A kind of even optical lens design method of double free-form surface LEDs based on cubic spline |
| CN108870318A (en) * | 2018-05-21 | 2018-11-23 | 广东工业大学 | A kind of LED free-form surface lens design method |
| CN111536439A (en) * | 2020-04-30 | 2020-08-14 | 中国科学院西安光学精密机械研究所 | Lamp capable of realizing rectangular uniform illumination, lamp set and lampshade structure optimization method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101975370B (en) | Design method of secondary light distribution lens for LED light source | |
| CN201892045U (en) | Novel illuminating bulb | |
| TWI311222B (en) | ||
| CN201531819U (en) | led streetlight lens | |
| CN103629570A (en) | lighting device | |
| TWI471616B (en) | Lens module for light emitting diode light source | |
| CN102287756A (en) | Construction method for curved surface of light emitting diode (LED) light distribution lens and LED light distribution lens | |
| CN104296072A (en) | Luminescent device and backlight source | |
| CN101846286A (en) | Lens for LED illumination | |
| CN101684920B (en) | Optical system for LED street lamp | |
| CN102679266A (en) | Implement method for light-emitting diode (LED) secondary light distribution lens capable of obtaining evenly distributed rectangular light spots | |
| CN102679265B (en) | Method for realizing homogenized control of light beam by utilizing free-form curved lens | |
| CN201935119U (en) | Wide-angle grading lens used for LED (light-emitting diode) and lamp box | |
| CN101684919A (en) | Led street lamp lens | |
| US20190101262A1 (en) | Light source guiding device | |
| CN101556026B (en) | Reflective cup of LED street lamp | |
| CN101660705A (en) | Polarized-light illuminating optical lens | |
| CN104075238B (en) | Lens and illuminating device with same | |
| CN203363991U (en) | LED (light-emitting diode) secondary optical lens | |
| CN102889550B (en) | Lens | |
| CN201661987U (en) | Non-imaging uniform light distribution lens | |
| CN104295967A (en) | LED multi-side lighting planer light source | |
| CN201531821U (en) | LED streetlight optical system | |
| CN104214668A (en) | Lens and LED lamp with same | |
| CN103574503B (en) | LED source lens module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120919 |