TY - JOUR
T1 - Estimation of flow rate and direction of medium with low scattering coefficient via linear polarization measurement
AU - Fixler, Dror
AU - Zalevsky, Zeev
PY - 2013/2
Y1 - 2013/2
N2 - Many biological systems involve flow of various types of liquids. Estimation of the rate and direction of the flow is highly important for a large number of bio-medical related applications. The working point discussed in this paper involves a medium with a relatively low scattering coefficient such that the polarized light going through it is not depolarized, but rather modifies its polarization state instead. An experimental validation is presented, which shows that illuminating flow in a medium with linear polarized light, and measuring the change in polarization state at the output of the medium, can correlate highly with the direction and flow rate through that medium. By inspecting the spatial shape change in the spot of light, and the change of polarization state in relation to different integration times as well, the direction and flow rate can be fully extracted.
AB - Many biological systems involve flow of various types of liquids. Estimation of the rate and direction of the flow is highly important for a large number of bio-medical related applications. The working point discussed in this paper involves a medium with a relatively low scattering coefficient such that the polarized light going through it is not depolarized, but rather modifies its polarization state instead. An experimental validation is presented, which shows that illuminating flow in a medium with linear polarized light, and measuring the change in polarization state at the output of the medium, can correlate highly with the direction and flow rate through that medium. By inspecting the spatial shape change in the spot of light, and the change of polarization state in relation to different integration times as well, the direction and flow rate can be fully extracted.
KW - Flowing medium
KW - Linear polarization
KW - Spatial shape of spot light
KW - Tissue scattering properties
UR - http://www.scopus.com/inward/record.url?scp=84871410793&partnerID=8YFLogxK
U2 - 10.1016/j.optlaseng.2012.09.007
DO - 10.1016/j.optlaseng.2012.09.007
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AN - SCOPUS:84871410793
SN - 0143-8166
VL - 51
SP - 91
EP - 95
JO - Optics and Lasers in Engineering
JF - Optics and Lasers in Engineering
IS - 2
ER -