A variation of particle image velocimetry is described that uses a third, unequally spaced, laser pulse to resolve the direction of a velocity vector extracted from an image. The use of a CCD camera makes the complete process electronic and therefore quicker and more convenient. The analysis method produces correlation functions with fewer noise correlations, resulting in less vector drop-out.
© 1995 Optical Society of America
Original Manuscript: May 19, 1995
Published: September 1, 1995
N. Farrugia, S. Kanne, and D. A. Greenhalgh, "Three-pulse digital particle image velocimetry," Opt. Lett. 20, 1827-1829 (1995)