Volumetric PIV with a Plenoptic Camera

Plenoptic cameras have received attention recently due to their ability to computationally refocus an image after it has been acquired. We describe the development of a robust, economical and easy-to-use volumetric PIV technique using a unique plenoptic camera built in our laboratory. The tomographic MART algorithm is used to reconstruct pairs of 3D particle volumes with velocity determined using conventional cross-correlation techniques. 3D/3C velocity measurements (volumetric dimensions of 2.8'' x 1.9'' x 1.6'') of a turbulent boundary layer produced on the wall of a conventional wind tunnel are presented.