TY - JOUR
T1 - The dependence of speckle contrast on velocity
T2 - A numerical study
AU - Van As, Kevin
AU - Simons, Bram A.
AU - Kleijn, Chris R.
AU - Kenjeres, Sasa
AU - Bhattacharya, Nandini
PY - 2022
Y1 - 2022
N2 - We study how the speckle contrast depends on scatterer velocity, with the goal of further developing laser speckle imaging as a quantitative measurement technique. To that end, we perform interferometric computer simulations on a dilute plug flow. The results of our numerical experiment, that we compare with known analytical expressions to confirm their veracity, match well at low velocities with the Gaussian expression. Finally, we address the issue of how velocity depends on speckle decorrelation time, and show that the speckle size is most likely the relevant connecting length scale.
AB - We study how the speckle contrast depends on scatterer velocity, with the goal of further developing laser speckle imaging as a quantitative measurement technique. To that end, we perform interferometric computer simulations on a dilute plug flow. The results of our numerical experiment, that we compare with known analytical expressions to confirm their veracity, match well at low velocities with the Gaussian expression. Finally, we address the issue of how velocity depends on speckle decorrelation time, and show that the speckle size is most likely the relevant connecting length scale.
KW - Mie theory
KW - Numerical simulation
KW - Speckle interferometry
KW - Velocimetry
UR - http://www.scopus.com/inward/record.url?scp=85145252926&partnerID=8YFLogxK
U2 - 10.1051/jeos/2022010
DO - 10.1051/jeos/2022010
M3 - Article
AN - SCOPUS:85145252926
VL - 18
SP - 174
EP - 180
JO - Journal of the European Optical Society - Rapid Publications
JF - Journal of the European Optical Society - Rapid Publications
SN - 1990-2573
IS - 2
ER -