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Optical Engineering

Wave optical analysis of light-emitting diode beam shaping using microlens arrays
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Paper Abstract

We investigate the use of optical systems consisting of either one or two refractive microlens arrays, a collimating and Fourier transforming lens for LED beam homogenization. Due to the small lenslet diameters, diffraction can lead to significant deviations from the desired homogene intensity distribution. Therefore, we analyze the two setups applying scalar diffraction theory and explain the occurring effects using numerical calculations. Our theoretical calculations are supported by experimental results.

Paper Details

Date Published: 1 October 2002
PDF: 9 pages
Opt. Eng. 41(10) doi: 10.1117/1.1499975
Published in: Optical Engineering Volume 41, Issue 10
Show Author Affiliations
Alexander Buettner, Fraunhofer-Institut fuer Angewandte Optik und Feinmechanik (Germany)
Uwe D. Zeitner, Fraunhofer-Institut fuer Angewandte Optik und Feinmechanik (Germany)

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