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Proceedings Paper

Generalized least squares approach to compute displacements, strains and rotations from combined single and/or double illumination holographic interferometry
Author(s): Armando Albertazzi
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Paper Abstract

This paper presents a generalized approach to simultaneously compute displacements and its derivatives from a combined single and double illumination setup. If more than three independent illumination sets are used, the redundant data is reduced through a least squares approach. This paper also presents a generalized way to compute an equivalent measurement efficiency coefficient to express how much a specific combined setup is sensitive to each displacement component and also to estimate its random error level. By using this coefficient, one can easily optimize a holographic setup for any particular application just playing with the positioning and the number of illumination points. Both mathematical derivation and analysis and a practical example are presented in this paper.

Paper Details

Date Published: 1 March 1994
PDF: 10 pages
Proc. SPIE 2004, Interferometry VI: Applications, (1 March 1994); doi: 10.1117/12.172583
Show Author Affiliations
Armando Albertazzi, Univ. Federal de Santa Catarina (Brazil)


Published in SPIE Proceedings Vol. 2004:
Interferometry VI: Applications
Ryszard J. Pryputniewicz; Gordon M. Brown; Werner P. O. Jueptner, Editor(s)

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