J0510103 Phase Shifting Digital Holography Applied to Particle Depth Measurement

Abstract

New methodology of phase shifting digital holography has been implemented for particle depth determination of the 3D particle tracking velocimetry. Although the new phase shifting method requires multiple shot of hologram recordings, it enables more high speed and stable recording of phase shift images with respect to the conventional PZT (Piezoelectric Transducer) based method and is thereby more suitable for 3D particle motion analysis in fluid flows. Test results demonstrate the strength of the new method from the viewpoint of the reconstructed image quality and the particle depth accuracy.