期刊
OPTICS EXPRESS
卷 18, 期 2, 页码 413-425出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.18.000413
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资金
- Nature Science Foundation of China (NSFC) [50835005, 50876038]
- High Tech Project of Ministry of Science and Technology [2008AA03A184]
- GuangDong Real Faith Optoelectronics Inc
Application specific LED packaging (ASLP) is an emerging technology for high performance LED lighting. We introduced a practical design method of compact freeform lens for extended sources used in ASLP. A new ASLP for road lighting was successfully obtained by integrating a polycarbonate compact freeform lens of small form factor with traditional LED packaging. Optical performance of the ASLP was investigated by both numerical simulation based on Monte Carlo ray tracing method and experiments. Results demonstrated that, comparing with traditional LED module integrated with secondary optics, the ASLP had advantages of much smaller size in volume (similar to 1/8), higher system lumen efficiency (similar to 8.1%), lower cost and more convenience for customers to design and assembly, enabling possible much wider applications of LED for general road lighting. Tolerance analyses were also conducted. Installation errors of horizontal and vertical deviations had more effects on the shape and uniformity of radiation pattern compared with rotational deviation. The tolerances of horizontal, vertical and rotational deviations of this lens were 0.11 mm, 0.14 mm and 2.4 degrees respectively, which were acceptable in engineering. (C) 2010 Optical Society of America
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