Complex Field Analysis of Temporal and Spatial Techniques in Digital Holographic Interferometry

Abstract

In this thesis, a novel concept of complex phasor method to process the digital holographic interference phase maps in complex field is proposed. Based on this concept, three temporal phase retrieval algorithms and one spatial retrieval approach are developed. Temporal complex phasor method is highly immune to noise and allows accurate measurement of dynamic object. A series of digital holograms is recorded by a high-speed camera during the continuously illumination changing or deformation process of the tested specimen. Each digital hologram is numerically reconstructed in the computer instead of optically, thus a sequence of complex-valued interference phase maps are obtained by the proposed concept. The complex phasor variation of each pixel is measured and analyzed along the time axis.