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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 2 — Jan. 18, 2010
  • pp: 413–425

Design of compact freeform lens for application specific light-emitting diode packaging

Kai Wang, Fei Chen, Zongyuan Liu, Xiaobing Luo, and Sheng Liu  »View Author Affiliations

Optics Express, Vol. 18, Issue 2, pp. 413-425 (2010)

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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 (~1/8), higher system lumen efficiency (~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° respectively, which were acceptable in engineering.

© 2010 OSA

OCIS Codes
(220.3630) Optical design and fabrication : Lenses
(230.3670) Optical devices : Light-emitting diodes
(220.4298) Optical design and fabrication : Nonimaging optics

ToC Category:
Optical Design and Fabrication

Original Manuscript: September 1, 2009
Revised Manuscript: October 19, 2009
Manuscript Accepted: October 19, 2009
Published: January 4, 2010

Kai Wang, Fei Chen, Zongyuan Liu, Xiaobing Luo, and Sheng Liu, "Design of compact freeform lens for application specific light-emitting diode packaging," Opt. Express 18, 413-425 (2010)

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