17 October 2017 Compact collimators designed with a modified point approximation for light-emitting diodes
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Abstract
We present a novel freeform lens design method for an application to LED collimating illumination. The method is derived from a basic geometric-optics analysis and construction approach. By using this method, a compact collimated lenses with Aspect Ratio = 0.219 is presented. Moreover, the utility efficiency (UE) inside the angle defined by ideal concentrator hypothesis with different lens-to-LED size ratios for both this lens and TIR lens are presented. A prototype of the collimator lens is also made to verify the practical performance of the lens, which has light distribution very compatible with the simulation results.
Conference Presentation
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Tao Luo, Gang Wang, "Compact collimators designed with a modified point approximation for light-emitting diodes", Proc. SPIE 10379, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XIV, 103790G (17 October 2017); doi: 10.1117/12.2273526; https://doi.org/10.1117/12.2273526
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