Evaluation of displacement derivatives by direct manipulation of interferograms

Massimo Facchini; Paolo Zanetta; Daniel Albrecht

doi:10.1117/12.195489

30 November 1994 Evaluation of displacement derivatives by direct manipulation of interferograms

Massimo Facchini, Paolo Zanetta, Daniel Albrecht

Proceedings Volume 2342, Interferometry '94: Photomechanics; (1994) https://doi.org/10.1117/12.195489
Event: International Conference on Interferometry '94, 1994, Warsaw, Poland

Abstract

Optical interferometric techniques are very fascinating tools for a full-field quantitative evaluation of displacements. While in some applications this information is sufficient, in many cases it is necessary to determine stresses that arise in the inspected object. These quantities are closely related to deformation and can be obtained from the partial derivatives of displacement. In this paper maps of displacement derivatives are retrieved by a direct manipulation of interferograms obtained with the phase-shifting method. Three main advantages are thus achieved: no need of prior displacement evaluation, no need of unwrapping procedures, short processing time.

Citation Download Citation

Massimo Facchini, Paolo Zanetta, and Daniel Albrecht "Evaluation of displacement derivatives by direct manipulation of interferograms", Proc. SPIE 2342, Interferometry '94: Photomechanics, (30 November 1994); https://doi.org/10.1117/12.195489

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