Abstract
The history of holographic interferometry is one of problems. It has progressed from a novel discovery to a recognized technology only by the systematic pursuit of explanations for the puzzling phenomena it presents: unusual fringe patterns, fringe localization phenomena and bizarre fringe parallax. How to use the fringes to find three-dimensional deformation patterns is also a problem. Furthermore, the problem of how to handle high-volume testing spurred the evolution from photographic plates to fiexible roll film for all electronic media. Finally, the use of CCD television cameras and digital video processing has made phase-step interferometry the dominant method of fringe analysis but presents a major problem in the form of the phase-unwrapping quandary. This paper will attempt to trace the history of this technology in terms of the problems it has presented and their solutions.
Published Version
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