Abstract

We propose a cross-correlation method to map the transverse velocities of particles moving in capillary vessels using full-field time-varying laser speckle technique. The mapping is achieved by a semi-random perturbation model that describes the intensity fluctuation of time-varying laser speckle signals. When passing through probing volume, moving particles encode a random perturbation into the observed laser speckle pattern. We calculate the transverse flow velocity by cross-correlating the temporal envelopes of the perturbation signals. The proposed method is experimentally verified by the use of polymer microsphere suspension in a glass capillary.

© 2015 Optical Society of America

Autocorrelation optical coherence tomography for mapping transverse particle-flow velocity

Yi Wang and Ruikang Wang
Opt. Lett. 35(21) 3538-3540 (2010)

Time varied illumination laser speckle contrast imaging

Máté Siket, Imre Jánoki, Kornél Demeter, Miklós Szabó, and Péter Földesy
Opt. Lett. 46(4) 713-716 (2021)

Full-field functional optical angiography

Mingyi Wang, Wenjian Mao, Caizhong Guan, Guanping Feng, Haishu Tan, Dingan Han, and Yaguang Zeng
Opt. Lett. 42(3) 635-638 (2017)

Evaluating multi-exposure speckle imaging estimates of absolute autocorrelation times

S. M. Shams Kazmi, Rebecca K. Wu, and Andrew K. Dunn
Opt. Lett. 40(15) 3643-3646 (2015)

Rapid measurement of transversal flow velocity vector with high spatial resolution using speckle decorrelation optical coherence tomography

Lei Fu, Ya Su, Yimin Wang, Lei Chen, Wenping Li, Hongjie Wang, Zhihong Li, and X. Steve Yao
Opt. Lett. 42(18) 3545-3548 (2017)