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Proceedings Paper

Comparison of molded plastics Fresnel lenses with molded plastics nonimaging "cones" for LED collimation
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Paper Abstract

We have investigated the light collection and collimation properties of both Fresnel lenses and the nonimaging (TIR) “cones” typically used with LEDs. We have measured the integrated light output and its spatial distribution, and we have also measured the sensitivity of these two parameters to misalignment between the optic and the LED. We find that for a given distance from the LED to the front of the optic, a Fresnel lens can produce a narrower (better collimated) beam than can a nonimaging “cone.” Various design and manufacturability factors must be weighed when determining which solution to choose for a given illumination problem, and some of these are discussed.

Paper Details

Date Published: 19 October 2012
PDF: 9 pages
Proc. SPIE 8489, Polymer Optics and Molded Glass Optics: Design, Fabrication, and Materials II, 848907 (19 October 2012); doi: 10.1117/12.932474
Show Author Affiliations
Nelson E. Claytor, Fresnel Technologies, Inc. (United States)
Richard N. Claytor, Fresnel Technologies, Inc. (United States)
Oscar M. Lechuga, Fresnel Technologies, Inc. (United States)


Published in SPIE Proceedings Vol. 8489:
Polymer Optics and Molded Glass Optics: Design, Fabrication, and Materials II
David H. Krevor; William S. Beich; Michael P. Schaub; Stefan M. Bäumer, Editor(s)

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