Print Email Facebook Twitter Sub-diffusion flow velocimetry with number fluctuation optical coherence tomography Title Sub-diffusion flow velocimetry with number fluctuation optical coherence tomography Author Cheishvili, K. (TU Delft ImPhys/Kalkman group) Kalkman, J. (TU Delft ImPhys/Computational Imaging; TU Delft ImPhys/Kalkman group) Date 2023 Abstract We have implemented number fluctuation dynamic light scattering optical coherence tomography (OCT) for measuring extremely slow, sub-diffusion flows of dilute particle suspensions using the second-order autocovariance function. Our method has a lower minimum measurable velocity than conventional correlation-based OCT or phase-resolved Doppler OCT, as the velocity estimation is not affected by the particle diffusion. Similar to non-dilute correlation-based OCT, our technique works for any Doppler angle. With our analysis we can quantitatively determine the concentration of particles under flow. Finally, we demonstrate 2D sub-diffusion flow imaging with a scanning OCT system at high rate by performing number fluctuation correlation analysis on subsequent B-scans Subject OA-Fund TU Delft To reference this document use: http://resolver.tudelft.nl/uuid:cfe9235a-cafd-4936-b109-c540b4fd6fbf DOI https://doi.org/10.1364/OE.474279 ISSN 1094-4087 Source Optics Express, 31 (3), 3755-3773 Part of collection Institutional Repository Document type journal article Rights © 2023 K. Cheishvili, J. Kalkman Files PDF oe_31_3_3755.pdf 4.19 MB Close viewer /islandora/object/uuid:cfe9235a-cafd-4936-b109-c540b4fd6fbf/datastream/OBJ/view