7 May 2012 Homogeneous and speckle-free laser illumination for range-gated imaging and active polarimetry
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Abstract
We present simple illumination devices with built-in speckle reduction using the spatial diversity approach. These devices are based on a waveguide homogenization technique with a transmission efficiency of up to 95%. Even for single-laser pulse illumination from a solid-state laser source a reduction of the speckle contrast by a factor of 4.5 was demonstrated. In detail, we present two different illumination devices based on either a solid-state laser source or an array of semiconductor laser diodes. These illumination devices are used for range-gated imaging and active polarimetry with speckle-free and homogeneous illumination.
© 2012 Society of Photo-Optical Instrumentation Engineers (SPIE)
Martin Laurenzis, Martin Laurenzis, Yves Lutz, Yves Lutz, Frank Christnacher, Frank Christnacher, Alexis Matwyschuk, Alexis Matwyschuk, Jean-Michel Poyet, Jean-Michel Poyet, } "Homogeneous and speckle-free laser illumination for range-gated imaging and active polarimetry," Optical Engineering 51(6), 061302 (7 May 2012). https://doi.org/10.1117/1.OE.51.6.061302 . Submission:
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