Design of axisymmetrical tailored concentrators for LED light source applications

Bart Van Giel; Youri Meuret; Hugo Thienpont

doi:10.1117/12.660115

21 April 2006 Design of axisymmetrical tailored concentrators for LED light source applications

Bart Van Giel, Youri Meuret, Hugo Thienpont

Proceedings Volume 6196, Photonics in Multimedia; 619603 (2006) https://doi.org/10.1117/12.660115
Event: SPIE Photonics Europe, 2006, Strasbourg, France

Abstract

In our contribution we present a solution to an important question in the design of a LED-based illumination engine for projection systems: the collimation of the LED light. We tested the principle in the modification of a common device in non-imaging optics, the compound Parabolic Concentrator. This CPC-like achieves a collection of 72% (ideal reflective coating presumed). This CPC-like was tailored by numerically solving an differential equation. This approach has some serious drawbacks. For a compact collection device with high collimation, an other approach is required. A more elegant design strategy will rely fully on geometrical principles. The result of our work is a compound collection lens that achieves a collection efficiency of 87%, assuming an ideal reflective coating and neglecting Fresnel losses. We study the performance of this device in detail. Further enhancements are suggested.

Citation Download Citation

Bart Van Giel, Youri Meuret, and Hugo Thienpont "Design of axisymmetrical tailored concentrators for LED light source applications", Proc. SPIE 6196, Photonics in Multimedia, 619603 (21 April 2006); https://doi.org/10.1117/12.660115

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