Optical design of adjustable light emitting diode for different lighting requirements |
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| Authors: | Lu Jia-Ning Yu Jie Tong Yu-Zhen and Zhang Guo-Yi |
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| Affiliation: | Research Center for Wide Gap Semiconductor, Peking University, Beijing 100871, China |
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| 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 the target plane.The algorithm of our design can easily change the radius of each circular target plane,which makes the size of the 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. |
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| Keywords: | LED optical design freedom compact lens energy mapping adjustable Tracepro |
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