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Applied Optics

Applied Optics


  • Vol. 51, Iss. 11 — Apr. 10, 2012
  • pp: 1654–1659

Collimating lens for light-emitting-diode light source based on non-imaging optics

Guangzhen Wang, Lili Wang, Fuli Li, and Gongjian Zhang  »View Author Affiliations

Applied Optics, Vol. 51, Issue 11, pp. 1654-1659 (2012)

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A collimating lens for a light-emitting-diode (LED) light source is an essential device widely used in lighting engineering. Lens surfaces are calculated by geometrical optics and nonimaging optics. This design progress does not rely on any software optimization and any complex iterative process. This method can be used for any type of light source not only Lambertian. The theoretical model is based on point source. But the practical LED source has a certain size. So in the simulation, an LED chip whose size is 1mm*1mm is used to verify the feasibility of the model. The mean results show that the lenses have a very compact structure and good collimating performance. Efficiency is defined as the ratio of the flux in the illuminated plane to the flux from LED source without considering the lens material transmission. Just investigating the loss in the designed lens surfaces, the two types of lenses have high efficiencies of more than 90% and 99%, respectively. Most lighting area (possessing 80% flux) radii are no more than 5 m when the illuminated plane is 200 m away from the light source.

© 2012 Optical Society of America

OCIS Codes
(080.1753) Geometric optics : Computation methods
(220.2945) Optical design and fabrication : Illumination design
(220.4298) Optical design and fabrication : Nonimaging optics

ToC Category:
Optical Design and Fabrication

Original Manuscript: September 7, 2011
Revised Manuscript: November 28, 2011
Manuscript Accepted: December 1, 2011
Published: April 4, 2012

Guangzhen Wang, Lili Wang, Fuli Li, and Gongjian Zhang, "Collimating lens for light-emitting-diode light source based on non-imaging optics," Appl. Opt. 51, 1654-1659 (2012)

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