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Conferences > ECBO > 2023 > AEIA > 126321L
  • Optical Coherence Imaging Techniques and Imaging in Scattering Media V
  • Technical Digest Series (Optica Publishing Group, 2023),
  • paper 126321L
  • •https://doi.org/10.1117/12.2670206

Sub-diffusion flow velocimetry with number fluctuation optical coherence tomography

Konstantine Cheishvili and Jeroen Kalkman

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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.

© 2023 SPIE

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