CN102494298A - Design method of array free curved lens for LED street lamp - Google Patents
Design method of array free curved lens for LED street lamp Download PDFInfo
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- CN102494298A CN102494298A CN2011103867467A CN201110386746A CN102494298A CN 102494298 A CN102494298 A CN 102494298A CN 2011103867467 A CN2011103867467 A CN 2011103867467A CN 201110386746 A CN201110386746 A CN 201110386746A CN 102494298 A CN102494298 A CN 102494298A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/72—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps in street lighting
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Abstract
The invention relates to a design method of an array free curved lens for an LED street lamp. The lens is composed of free curved arrays. A light beam is emitted by a light emitting surface of an LED chip and is emitted to a road surface through the free curved arrays after passing through a primary lens. A differential equation is solved according to energy conservation, a square secondary light distribution free curved lens of a single LED is designed, and the array free curved lens is formed according to an LED arranging way. In the using process, a certain number of LEDs are arranged in a certain way, the corresponding array free curved lens is installed, and rays are uniformly distributed in the secondary light distribution process, therefore, the phenomenon that the light color of the LED street lamp is nonuniform is reduced, and the visual comfort is enhanced.
Description
Technical field
The present invention relates to a kind of method for designing of array free-form surface lens of the LED of being used for street lamp; The present invention adopts the differential equation to design single led quadrate secondary luminous intensity distribution free-form surface lens; And according to LED arrangement mode composition array free-form surface lens; Be applied to satisfy the road lighting requirement on the LED street lamp, belong to LED lighting engineering application.
Background technology
(Light Emitting Diodes is a kind of important solid state light emitter LED) to light emitting diode, has low cost, the life-span is long, colour temperature is optional and advantage such as environmental protection and energy saving.It can be widely used in fields such as illumination, demonstration.In recent years, especially, the LED road lighting developed faster in using.Requirement in " city illumination design standard ", the luminous intensity distribution of street lamp are rectangular light spot, and the light that street lamp sends all should be distributed on the road surface, and it is almost nil that the part outside the road surface receives light, in order to avoid vehicles or pedestrians are at a distance produced dazzle.Traditional be in the road lighting of light source with the high-pressure mercury lamp, be utilized on the secondary conical surfaces such as parabola, ellipsoid and reflect the optical design that adds transmittance structure, form the rectangular light spot that requires.LED is a kind of lambert's body light source, and radiation angle is 90 °～120 °, and direct irradiation can form the circular light spot that area is bigger on the road surface.In order effectively to utilize light, and satisfy the road lighting requirement, need carry out the secondary optics design, hope that the light that is sent by LED can form the uniform rectangular light spot of illumination on the road surface LED.
In recent years, free form surface can freely distribute the function of light intensity and control light angle to be widely used in the light optics design owing to having, and especially solves LED illumination uniformity problem.After LED carried out reasonable secondary luminous intensity distribution design, in lamp applications, only need the light output of single led unit is simply superposeed, satisfy the lighting requirement of road.On this basis,, the present invention proposes a kind of array free-form surface lens, simultaneously, reduce the photochromic non-uniform phenomenon that brings by LED combination street lamp, strengthen euphorosia property for simplifying the encapsulation process of LED secondary light-distribution lens.
Summary of the invention
Based on above technical background, the present invention is a purpose with the array free-form surface lens that designs a kind of LED of being used for street lamp, proposes a kind of method for designing that is used for the array free-form surface lens of LED street lamp, and its concrete steps are following:
(1) carries out the led light source modeling analysis; According to the led light source of being selected for use, carry out the luminous intensity distribution of light source and measure, and carry out the led light source modeling according to the luminous intensity distribution characteristic of measuring.
(2) the curved surface face type data that gain freedom; For the rectangle luminous intensity distribution on the realization road surface and the even distribution of light intensity, utilize conservation of energy principle, promptly between single led light that sends and road sensitive surface, set up the relation of mapping one by one.Design the rectangle free form surface here; The light that LED is sent is assumed to be the energy sphere; The method of utilizing grid to divide is divided into infinitesimal with sphere; Suppose that each infinitesimal will be identical with infinitesimal and the entrained right energy of the infinitesimal on the area of illumination on the rectangle free form surface, will form projection relation between them.(as shown in Figure 1) utilizes and to set up the differential equation with co-relation, for given led light source and road lighting demand, i.e. and pole height and area of illumination scope etc., the face type discrete data of the curved surface that can gain freedom.(as shown in Figure 2)
(3) obtain array free-form surface lens form; Road lighting illumination requirement according to design; Select number and the arrangement mode of LED; And the free form surface face type data of the single led secondary light-distribution of trying to achieve more than utilizing, utilize reverse-engineering gain freedom the face type structure of curved surface and the entity form of free-form surface lens, (as shown in Figure 3) is according to number and the arrangement mode of LED; Carry out rectangle free-form surface lens entity and arrange, i.e. design obtains the array free-form surface lens.(as shown in Figure 4)
The invention has the advantages that: the circular light spot that LED is sent becomes rectangular light spot after the free-form surface lens refraction; Satisfy the lighting requirement of road; And on the basis of single led free-form surface lens, further be combined into the array free-form surface lens; Omit the packaging technology step of secondary light-distribution lens on the one hand, in integrated encapsulation, can reduce the photochromic non-uniform phenomenon that brings by LED combination street lamp on the other hand, strengthen euphorosia property.
Description of drawings
Fig. 1 is the energy mapping relations figure of LED light-emitting area and free form surface and area of illumination;
Fig. 2 is the face type schematic diagram data of the free form surface that obtains;
Fig. 3 utilizes the gain freedom face type organigram of curved surface of reverse-engineering;
Fig. 4 is an array free-form surface lens sterogram;
The specific embodiment
The present invention is a kind of method for designing of array free-form surface lens of the LED of being used for street lamp.The practical implementation process of design process is following:
Step (1) is carried out the led light source modeling analysis; According to the led light source of being selected for use, the distribution curve flux that utilizes optical gauge to carry out light source is measured, and carries out the led light source modeling according to the luminous intensity distribution characteristic of measuring, and led light source is reduced to the characteristic of luminous angle and Energy distribution.
Step (2) is set up the single led free-form surface lens differential equation; The method of utilizing conservation of energy principle and grid to divide forms the relation of shining upon one by one with infinitesimal and the infinitesimal on the rectangle free form surface and the infinitesimal on the area of illumination of LED energy sphere, sets up the differential equation.
Step (3) obtains single led free-form surface lens face type data; Find the solution the above differential equation, obtain free form surface face type data discrete point.
Step (4) obtains single led free-form surface lens moulding; Utilize the reverse-engineering of engineering drawing software gain freedom the face type structure of curved surface and the entity form of free-form surface lens.
Step (5) obtains the array free-form surface lens; According to the road lighting illumination requirement of design, select number and the arrangement mode of LED, carry out rectangle free-form surface lens entity and arrange.
Claims (2)
1. array free-form surface lens that is used for the LED street lamp; It is characterized in that: according to the road lighting requirement; Set up the sculptured surface modeling of single led chip, and free-form surface lens is arranged the array free-form surface lens that forms the LED street lamp according to the LED arrangement mode.
2. according to the said method of claim 1, its realization may further comprise the steps:
Step (1) is carried out the led light source modeling analysis; According to the led light source of being selected for use, the distribution curve flux that utilizes optical gauge to carry out light source is measured, and carries out the led light source modeling according to the luminous intensity distribution characteristic of measuring, and led light source is reduced to the characteristic of luminous angle and Energy distribution.
Step (2) obtains single led free-form surface lens face type data; The method of utilizing conservation of energy principle and grid to divide; The infinitesimal of LED energy sphere and the infinitesimal on the rectangle free form surface and the infinitesimal on the area of illumination are formed the relation of mapping one by one; Set up the differential equation and find the solution, obtain free form surface face type data discrete point.
Step (3) obtains single led free-form surface lens moulding; Utilize the reverse-engineering of engineering drawing software gain freedom the face type structure of curved surface and the entity form of free-form surface lens.
Step (4) obtains the array free-form surface lens; According to the road lighting illumination requirement of design, select number and the arrangement mode of LED, carry out rectangle free-form surface lens entity and arrange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103867467A CN102494298A (en) | 2011-11-29 | 2011-11-29 | Design method of array free curved lens for LED street lamp |
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| CN2011103867467A CN102494298A (en) | 2011-11-29 | 2011-11-29 | Design method of array free curved lens for LED street lamp |
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| CN102494298A true CN102494298A (en) | 2012-06-13 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015014062A1 (en) * | 2013-07-31 | 2015-02-05 | 华南理工大学 | Free-form surface micro lens array for led headlamp of automobile |
| CN108036281A (en) * | 2017-08-25 | 2018-05-15 | 广东省半导体产业技术研究院 | A kind of LED lens array design methodology for forming uniform square hot spot |
| CN108343861A (en) * | 2017-01-24 | 2018-07-31 | 清华大学 | Free form surface lighting system |
| CN111256053A (en) * | 2020-01-23 | 2020-06-09 | 上海润廷电子科技有限公司 | Optical design method and lamp for forming uniform rectangular light spots and low glare |
| CN111897127A (en) * | 2020-08-26 | 2020-11-06 | 之江实验室 | Optimization design method of free-form surface lens for beam shaping of pumping laser system |
| CN114153075A (en) * | 2022-01-11 | 2022-03-08 | 荣仪尚科光电技术(哈尔滨)有限公司 | Natural light homogenization lighting device and method of single plane and free-form surface or sawtooth grating |
| CN114321818A (en) * | 2022-01-11 | 2022-04-12 | 荣仪尚科光电技术(哈尔滨)有限公司 | Array type natural light homogenization lighting device and method based on free-form surface |
Citations (3)
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| CN101684919A (en) * | 2009-07-16 | 2010-03-31 | 江苏伯乐达光电科技有限公司 | Led street lamp lens |
| CN101749641A (en) * | 2009-12-31 | 2010-06-23 | 华南理工大学 | Free-form surface spreadlightlens for high-power LED street lighting |
| CN101858557A (en) * | 2010-06-12 | 2010-10-13 | 北京航空航天大学 | Secondary optical lens of LED street lamp and design method thereof |
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2011
- 2011-11-29 CN CN2011103867467A patent/CN102494298A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101684919A (en) * | 2009-07-16 | 2010-03-31 | 江苏伯乐达光电科技有限公司 | Led street lamp lens |
| CN101749641A (en) * | 2009-12-31 | 2010-06-23 | 华南理工大学 | Free-form surface spreadlightlens for high-power LED street lighting |
| CN101858557A (en) * | 2010-06-12 | 2010-10-13 | 北京航空航天大学 | Secondary optical lens of LED street lamp and design method thereof |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015014062A1 (en) * | 2013-07-31 | 2015-02-05 | 华南理工大学 | Free-form surface micro lens array for led headlamp of automobile |
| CN108343861A (en) * | 2017-01-24 | 2018-07-31 | 清华大学 | Free form surface lighting system |
| CN108343861B (en) * | 2017-01-24 | 2020-07-10 | 清华大学 | Free-form surface illumination system |
| CN108036281A (en) * | 2017-08-25 | 2018-05-15 | 广东省半导体产业技术研究院 | A kind of LED lens array design methodology for forming uniform square hot spot |
| CN108036281B (en) * | 2017-08-25 | 2019-11-12 | 广东省半导体产业技术研究院 | A kind of LED lens array design methodology forming uniform square hot spot |
| CN111256053A (en) * | 2020-01-23 | 2020-06-09 | 上海润廷电子科技有限公司 | Optical design method and lamp for forming uniform rectangular light spots and low glare |
| CN111897127A (en) * | 2020-08-26 | 2020-11-06 | 之江实验室 | Optimization design method of free-form surface lens for beam shaping of pumping laser system |
| CN114153075A (en) * | 2022-01-11 | 2022-03-08 | 荣仪尚科光电技术(哈尔滨)有限公司 | Natural light homogenization lighting device and method of single plane and free-form surface or sawtooth grating |
| CN114321818A (en) * | 2022-01-11 | 2022-04-12 | 荣仪尚科光电技术(哈尔滨)有限公司 | Array type natural light homogenization lighting device and method based on free-form surface |
| CN114153075B (en) * | 2022-01-11 | 2023-06-30 | 荣仪尚科光电技术(哈尔滨)有限公司 | Natural light homogenizing lighting device and method for single plane and free curved surface or sawtooth grating |
| CN114321818B (en) * | 2022-01-11 | 2023-06-30 | 荣仪尚科光电技术(哈尔滨)有限公司 | Array type natural light homogenizing lighting device and method based on free curved surface |
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Application publication date: 20120613 |