Resolving directional ambiguity in dynamic light scattering-based transverse motion velocimetry in optical coherence tomography

Opt Lett. 2014 Feb 1;39(3):521-4. doi: 10.1364/OL.39.000521.

Abstract

Dynamic light scattering-based optical coherence tomography approaches have been successfully implemented to measure total transverse (xy) flow speed, but are unable to resolve directionality. We propose a method to extract directional velocity in the transverse plane by introducing a variable scan bias to our system. Our velocity estimation, which yields the directional velocity component along the scan axis, is also independent of any point-spread function calibration. By combining our approach with Doppler velocimetry, we show three-component velocimetry that is appropriately dependent on latitudinal and longitudinal angle.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Light*
  • Motion*
  • Scattering, Radiation*
  • Tomography, Optical Coherence / methods*