Single-camera 3D PTV using particle intensities and structured light

A. A. Aguirre-Pablo, Abdulrahman Barakat Aljedaani, J. Xiong, Ramzi Idoughi, Wolfgang Heidrich, Sigurdur T Thoroddsen

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

We use structured monochromatic volume illumination with spatially varying intensity profiles, to achieve 3D intensity particle tracking velocimetry using a single video camera. The video camera records the 2D motion of a 3D particle field within a fluid, which is perpendicularly illuminated with depth gradients of the illumination intensity. This allows us to encode the depth position perpendicular to the camera, in the intensity of each particle image. The light intensity field is calibrated using a 3D laser-engraved glass cube containing a known spatial distribution of 1100 defects. This is used to correct for the distortions and divergence of the projected light. We use a sequence of changing light patterns, with numerous sub-gradients in the intensity, to achieve a resolution of 200 depth levels.
Original languageEnglish (US)
JournalExperiments in Fluids
Volume60
Issue number2
DOIs
StatePublished - Jan 10 2019

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