CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
Prev
Next
|
|
|
Optical design of adjustable light emitting diode for different lighting requirements |
Lu Jia-Ning (芦佳宁), Yu Jie (余杰), Tong Yu-Zhen (童玉珍), Zhang Guo-Yi (张国义) |
Research Center for Wide Gap Semiconductor, Peking University, Beijing 100871, China |
|
|
Abstract Light emitting diode (LED) sources have been widely used for illumination. Optical design, especially freedom compact lens design is necessary to make LED sources applied in lighting industry, such as large-range interior lighting and small-range condensed lighting. For different lighting requirements, the size of target planes should be variable. In our paper we provide a method to design freedom lens according to the energy conservation law and Snell law through establishing energy mapping between the luminous flux emitted by a Lambertian LED source and a certain area of target plane. The algorithm of our design can easily change the radius of each circular target plane, which makes the size of target plane adjustable. Ray-tracing software Tracepro is used to validate the illuminance maps and polar-distribution maps. We design lenses for different sizes of target planes to meet specific lighting requirements.
|
Received: 10 February 2012
Revised: 09 May 2012
Accepted manuscript online:
|
PACS:
|
71.55.Eq
|
(III-V semiconductors)
|
|
42.15.-i
|
(Geometrical optics)
|
|
42.15.Eq
|
(Optical system design)
|
|
Fund: Project supported by the State Key Development Program for Basic Research of China (Grant No. 2011CB013101). |
Corresponding Authors:
Tong Yu-Zhen
E-mail: yztong16@pku.edu.cn
|
Cite this article:
Lu Jia-Ning (芦佳宁), Yu Jie (余杰), Tong Yu-Zhen (童玉珍), Zhang Guo-Yi (张国义) Optical design of adjustable light emitting diode for different lighting requirements 2012 Chin. Phys. B 21 127105
|
[1] |
Craford M G 2005 Proc. SPIE 5941 1
|
[2] |
Schubert E F 2006 Light-Emitting Diodes 2nd edn. (Cambridge: Cambridge University Press) pp. 13-20
|
[3] |
Bierhuizen S, Krames M, Harbers G and Weijers G 2007 Proc. SPIE 6669 66690B
|
[4] |
Wang Z M, Ma Y L, Zhang F J and Feng Y D 2007 Chin. Phys. 16 1704
|
[5] |
Chen J, Fan G H, Zhang Y Y, Pang W, Zheng S W and Yao G R 2012 Chin. Phys. 21 058504
|
[6] |
Wang K, Liu S, Chen F, Liu Z Y and Luo X B 2009 Opt. Express 17 5457
|
[7] |
Shen M, Li H F, Lu W and Liu X 2006 Acta Photon. Sin. 35 93 (in Chinese)
|
[8] |
Luo Y, Feng Z X, Han Y J and Li H T 2010 Opt. Express 18 9055
|
[9] |
Situ W C, Han Y J, Li H T and Luo Y 2011 Opt. Express 19 A1022
|
[10] |
Wang K, Wu D, Qin Z, Chen F, Luo X B and Liu S 2011 Opt. Express 19 A830
|
[11] |
Wang K, Chen F, Liu Z Y and Liu S 2010 Opt. Express 18 413
|
No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
Altmetric
|
blogs
Facebook pages
Wikipedia page
Google+ users
|
Online attention
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
View more on Altmetrics
|
|
|