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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 17 — Aug. 18, 2008
  • pp: 12958–12966

Freeform LED lens for uniform illumination

Yi Ding, Xu Liu, Zhen-rong Zheng, and Pei-fu Gu  »View Author Affiliations


Optics Express, Vol. 16, Issue 17, pp. 12958-12966 (2008)
http://dx.doi.org/10.1364/OE.16.012958


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Abstract

Light flux from LED must be redistributed to meet the needs of lighting in most cases, a new method is proposed for its secondary optic design. Based on refractive equation and energy conservation, a set of first-order partial differential equations which represent the characters of LED source and desired illumination were presented. The freeform lens was constructed by solving these equations numerically. The numerical results showed that we can get a freeform lens for the illumination of uniformity near to 90%, with considerable high computation speed. This method can shorten the designing time of the freeform lens with high accepted tolerance.

© 2008 Optical Society of America

OCIS Codes
(220.2945) Optical design and fabrication : Illumination design
(080.4225) Geometric optics : Nonspherical lens design
(080.4298) Geometric optics : Nonimaging optics

ToC Category:
Geometric optics

History
Original Manuscript: May 20, 2008
Revised Manuscript: July 6, 2008
Manuscript Accepted: July 21, 2008
Published: August 11, 2008

Citation
Yi Ding, Xu Liu, Zhen-rong Zheng, and Pei-fu Gu, "Freeform LED lens for uniform illumination," Opt. Express 16, 12958-12966 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-17-12958


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