Chin. Phys. B ›› 2012, Vol. 21 ›› Issue (12): 127105-127105.doi: 10.1088/1674-1056/21/12/127105

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Optical design of adjustable light emitting diode for different lighting requirements

芦佳宁, 余杰, 童玉珍, 张国义   

  1. Research Center for Wide Gap Semiconductor, Peking University, Beijing 100871, China
  • 收稿日期:2012-02-10 修回日期:2012-05-09 出版日期:2012-11-01 发布日期:2012-11-01
  • 基金资助:
    Project supported by the State Key Development Program for Basic Research of China (Grant No. 2011CB013101).

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)   

  1. Research Center for Wide Gap Semiconductor, Peking University, Beijing 100871, China
  • Received:2012-02-10 Revised:2012-05-09 Online:2012-11-01 Published:2012-11-01
  • Contact: Tong Yu-Zhen E-mail:yztong16@pku.edu.cn
  • Supported by:
    Project supported by the State Key Development Program for Basic Research of China (Grant No. 2011CB013101).

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摘要： 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.

关键词: LED, optical design, freedom compact lens, energy mapping, adjustable, Tracepro

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.

Key words: LED, optical design, freedom compact lens, energy mapping, adjustable, Tracepro

中图分类号:  (III-V semiconductors)

  • 71.55.Eq
42.15.-i (Geometrical optics) 42.15.Eq (Optical system design)