Optical design of adjustable light emitting diode for different lighting requirements

doi:10.1088/1674-1056/21/12/127105

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.

Keywords: LED optical design freedom compact lens energy mapping adjustable Tracepro

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

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Optical design of adjustable light emitting diode for different lighting requirements

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