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Propagation of partially coherent light through a light pipe

Publication date 2013
B-Phot Authors Hugo Thienpont
DOI 10.1364/OE.21.017007
S. Roelandt, J. Tervo, Y. Meuret, G. Verschaffelt, and H. Thienpont, “Propagation of partially coherent light through a light pipe,” Opt. Express, vol. 21, no. 14, pp. 17007–17019, 2013.
Abstract In laser projection applications, laser light modules are often combined with rotating diffusers in order to reduce the appearance of speckle on the projection screen. The rotation of a diffuser in a laser beam generates a beam of partially coherent light. Propagation of this light through the different optical components constituting the laser projector is thus essential when investigating the appearance of speckle. In this paper, a computationally efficient simulation model is presented to propagate partially coherent light through a homogenizing rectangular light pipe. The light pipe alters the coherence properties of the light and different consequences are discussed. The outcomes of the simulation model are experimentally verified using a reversing wavefront Michelson interferometer.
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