We describe a bidirectional color Doppler Fourier-domain optical coherence tomography system capable of measuring absolute velocities of moving scatterers by illuminating the sample with two linearly and orthogonally polarized beams, incident at a known angle on the sample. The velocity calculation is independent of the exact orientation of the velocity vector in the detection plane. First measurements were performed on a rotating disk driven at well-defined velocities and tilted by various small angles. Our results indicate a high correlation between preset and calculated velocities (correlation coefficient 0.999) and the independency of these velocities from the tilting angle of the disk. We demonstrate that bidirectional color Doppler optical coherence tomography allows for the measurement of absolute blood flow values in vivo in human retinal vessels.
© 2008 Optical Society of AmericaFull Article | PDF Article
Hassan Wehbe, Marco Ruggeri, Shuliang Jiao, Giovanni Gregori, Carmen A. Puliafito, and Weizhao Zhao
Opt. Express 15(23) 15193-15206 (2007)
Shuichi Makita, Tapio Fabritius, and Yoshiaki Yasuno
Opt. Lett. 33(8) 836-838 (2008)
Zhongwei Zhi, William Cepurna, Elaine Johnson, Tueng Shen, John Morrison, and Ruikang K Wang
Biomed. Opt. Express 2(3) 579-591 (2011)