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Proceedings Paper

Design of freeform LED lens with large light deflection angle for road lighting application
Author(s): Shaoyun Yin; Zhongxun Wang; Xiuhui Sun; Liangping Xia; Hui Pang; Qiling Deng; Chunlei Du
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Paper Abstract

The deflection of light of a single optical surface is limited by the Fresnel reflection loss and it is usually not enough to meet the requirements in large road width, tilt lighting LED lens design. This paper presents a method which greatly increases the light deflection angle of LED lens by combining a tilting aspherical surface with a freeform surface. Using this design method, a road lighting LED lens for length L= 30m, road width W=12m and tilt angle θ = 15 ° is designed and manufactured. The experimental results show that the overall road luminance uniformity is as high as 0.7. This design method greatly expand the light distributing capacity of the free-form surface LED lens, and it can be widely used in the design of LED road lighting lens and other illumination applications where large light deflection angle is needed.

Paper Details

Date Published: 27 November 2012
PDF: 7 pages
Proc. SPIE 8560, LED and Display Technologies II, 85600E (27 November 2012); doi: 10.1117/12.999767
Show Author Affiliations
Shaoyun Yin, Chongqing Institute of Green and Intelligent Technology (China)
Zhongxun Wang, Chongqing Institute of Green and Intelligent Technology (China)
Institute of Optics and Electronics (China)
Xiuhui Sun, Chongqing Institute of Green and Intelligent Technology (China)
Liangping Xia, Chongqing Institute of Green and Intelligent Technology (China)
Institute of Optics and Electronics (China)
Hui Pang, Institute of Optics and Electronics (China)
Qiling Deng, Institute of Optics and Electronics (China)
Chunlei Du, Chongqing Institute of Green and Intelligent Technology (China)


Published in SPIE Proceedings Vol. 8560:
LED and Display Technologies II
Yanbing Hou; Bin Hu, Editor(s)

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