Using a fly's eye integrator in efficient illumination engines with multiple light-emitting diode light sources

Bart Van Giel; Youri Meuret; Hugo Thienpont

doi:10.1117/1.2727313

1 April 2007 Using a fly's eye integrator in efficient illumination engines with multiple light-emitting diode light sources

Bart Van Giel, Youri Meuret, Hugo Thienpont

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Optical Engineering, Vol. 46, Issue 4, 043001 (April 2007). https://doi.org/10.1117/1.2727313

Abstract

High brightness light emitting diodes (LEDs) become a serious alternative for ultrahigh performance lamps in projection displays. We focus on the illumination part of a LED projection engine. We discuss the problem of using several LED light sources for each primary color. In critical applications, the use of several light sources for each color has important benefits. It increases the possible light output to the screen and makes it possible to design a system that is tolerant for failures of one of the LEDs. Therefore, we need an optical system that is both efficient and is able to produce a uniform light beam if one of the LEDs fails. We show that our illumination engine using a fly's eye integrator meets these requirements, using ray-tracing simulations of the engine. An efficient optimization method based on the simplex method [R. J. Koshel, Opt. Lett. 30, 649–651 (2005)] was developed to design the LED collimation reflective device with collection efficiencies up to 95%. The lens systems in the engine were designed with the same method. This results in a total system efficiency of 77%.

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Bart Van Giel, Youri Meuret, and Hugo Thienpont "Using a fly's eye integrator in efficient illumination engines with multiple light-emitting diode light sources," Optical Engineering 46(4), 043001 (1 April 2007). https://doi.org/10.1117/1.2727313

Published: 1 April 2007

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