Quantification of a three-dimensional velocity vector using spectral-domain Doppler optical coherence tomography.
Multiangle, fiber-based, spectral-domain Doppler optical coherence tomography with a phase-resolved algorithm is presented to measure three components of an arbitrary velocity vector. A beam divider that divides a probe beam to have five independent viewpoints and path length delays was designed. The divider was inserted into the sampling arm of a Doppler optical coherence tomography system between the collimator and the first galvo mirror of a two-axis galvo scanner. The divider produced five independent D k's (the average difference between the wave vectors of incoming and outgoing beams) after passing through the focusing lens while keeping two-axis scanning capability. After calibration, an unknown velocity vector field inside a microtube was quantified by solving a three-dimensional minimization problem.
Ahn
Yeh-Chan
YC
Beckman Laser Institute, Department of Biomedical Engineering, University of California, Irvine, California 92617, USA.
Jung
Woonggyu
W
Chen
Zhongping
Z
D000465:Algorithms; D002138:Calibration; D004301:Doppler Effect; D004867:Equipment Design; D005583:Fourier Analysis; D021621:Imaging, Three-Dimensional; D015233:Models, Statistical; D008962:Models, Theoretical; D055095:Optics and Photonics; D041623:Tomography, Optical Coherence / Q000295:instrumentation / Q000379:methods*