3D Particle image velocimetry using correlation image sensor

In this paper, we deal with a novel principle of three-dimensional particle image velocimetry (3D-PIV) of fluid motion using correlation image sensor (CIS) and a structured illumination. The correlation image sensor is the device which outputs the temporal correlation between incident light intensity and reference signal. CIS captures the loci of tracer particles with the passing time information in the form of phase distribution relating to a reference sinusoidal signal. Using spatio-temporally modulated illumination, it also records depth-directional component of the particle velocity. Therefore, the proposed 3D-PIV system enables us to acquire the position and time information of numbers of tracers at the same time. The principle and implementation method in detail, and several results of basic experiments are shown.