Multi-camera digital holographic PIV: Tomographic DHPIV

The wide scale application of digital holographic particle image velocimetry (DHPIV) as a three-component three-dimensional (3C-3D) velocity field measurement tool is current restricted by the limited size and resolution of commercially available CCD arrays, resulting in a elongation of particle is the direction normal to the hologram plane. This elongation can be over an order of magnitude greater than the true particle diameter and posses significant problems for the cross-correlation analysis used in particle image velocimetry (PIV). In this paper we discuss a multi-camera method of tomographic digital holographic particle image velocimetry (Tomo-DHPIV) to reconstruct a 3D intensity field without a loss of resolution in the hologram normal direction. Application of this reconstruction technique is provided along with Monte Carlo simulations of the effects of various operating parameters