Sub-diffusion flow velocimetry with number fluctuation optical coherence tomography
Konstantine Cheishvili (TU Delft - Applied Sciences)
Jeroen Kalkman (TU Delft - ImPhys/Computational Imaging, TU Delft - Applied Sciences)
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Abstract
We show number fluctuations dynamic light scattering optical coherence tomography (OCT) for measuring extremely slow, sub-diffusion flows of dilute particle suspensions. Our method removes the minimum measurable velocity limitation of conventional correlation-based or phase-resolved Doppler OCT, set by flowing particles’ Brownian motion. Our technique works for any Doppler angle, is applicable to 2D flow imaging with scanning OCT systems and can be used to determine concentration of particles under flow.