Abstract
A holographic interferometric technique based on fast sequences of double exposures in photorefractive crystals for the dynamic analysis of reflection-type objects is presented. Methods for optimizing the diffraction efficiency and the decay time of the holographic gratings recorded at short exposure times are discussed. Special attention is paid to the use of external electrical fields. The maximization of fringe contrast in double-exposed interferograms is investigated both theoretically and experimentally. Finally, the automatic evaluation of interferograms is demonstrated by use of a sample sequence of interferograms.
© 1994 Optical Society of America
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