Laser Imaging in Dense Sprays: SLIPI

StructuredLaserIlluminationPlanarImaging (SLIPI) reduces multiple light scattering applying laser imaging in dense sprays.SLIPIis based on spatially modulated laser light sheets for Mie or LIF imaging. While multiply scattered light loses the modulation information, it is maintained for singly scattered light. When the stripe-like phase shifted images are combined correctly, the resulting SLIPI image shows higher image contrast and reveals inner spray structures, which are hidden when using conventional planar laser imaging.

Laser light sheet imaging in a hollow cone spray with and w/o SLIPI

courtesy: Elias Kristensson, ILASS-Europe, 2013

References:Y.N.Mishra, E. Kristensson, E. Berrocal, “Reliable LIF/Mie droplet sizing insprays using structured laser illumination planar imaging”, Optics Express,Vol. 22, Issue 4, pp. 4480-4492 (2014),http://dx.doi.org/10.1364/OE.22.004480E. Berrocal, E. Kristensson, P. Hottenbach, M. Aldén , G. Gruenefeld,“Quantitative imaging of a non-combusting diesel spray using structuredlaser illumination planar imaging”, Appl. Phys. B (2012) 109:683–694