A Fringe Carrier Technique For Unambiguous Determination Of Holographically Recorded Displacements

Paul D. Plotkowski; Yau Y. Hung; Joseph D. Hovanesian; Grant Gerhart

doi:10.1117/12.946278

12 June 1985 A Fringe Carrier Technique For Unambiguous Determination Of Holographically Recorded Displacements

Paul D. Plotkowski, Yau Y. Hung, Joseph D. Hovanesian, Grant Gerhart

Proceedings Volume 0523, Applications of Holography; (1985) https://doi.org/10.1117/12.946278
Event: 1985 Los Angeles Technical Symposium, 1985, Los Angeles, United States

Abstract

This paper presents a new technique which eliminates the ambiguity in holographic fringe interpretation. The technique is based upon generating a high density linear phase carrier. Introduction of the carrier results in the formation of a fringe pattern which has mono-tonically increasing fringe orders. Any deformation of the object under study produces a corresponding perturbation of the carrier pattern. If the carrier dominates, the perturbed pattern continues to have monotonically increasing fringe orders and thus allows the fringe order to be determined at any point without ambiguity. The phase change due to deformation alone is obtained by subtracting the known linear carrier from the modulated fringe pattern. Elimination of fringe ambiguity will pave the way for automatic data acquisition in holographic interferometry.

Citation Download Citation

Paul D. Plotkowski, Yau Y. Hung, Joseph D. Hovanesian, and Grant Gerhart "A Fringe Carrier Technique For Unambiguous Determination Of Holographically Recorded Displacements", Proc. SPIE 0523, Applications of Holography, (12 June 1985); https://doi.org/10.1117/12.946278

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