Mapping transverse velocity of particles in capillary vessels by time-varying laser speckle through perturbation analyses.
Mapping transverse velocity of particles in capillary vessels by time-varying laser speckle through perturbation analyses.
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DOI：
10.1364/ol.40.001896
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发表时间：
2015-05-01
期刊：
影响因子：
3.6
通讯作者：
Wang R
中科院分区：
文献类型：
--
作者：
Wang Y;Ma Z;Wang R
本文提出了一种利用全场时变激光散斑技术测量毛细血管中颗粒横向运动速度的互相关方法。该映射是通过描述时变激光散斑信号强度波动的半随机扰动模型实现的。当通过探测体积时，移动的颗粒将随机扰动编码到观察到的激光散斑图案中。我们通过互相关的扰动信号的时间包络来计算横向流动速度。所提出的方法进行了实验验证，通过使用聚合物微球悬浮在玻璃毛细管。
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.