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Proceedings Paper

Strain distribution measurement by digital holographic interferometry using three spherical waves
Author(s): Motoharu Fujigaki; Kohhei Shiotani; Ryosuke Kido; Yoshiharu Morimoto
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Paper Abstract

In this paper, we proposed a calibration method with a reference plane to analyze strain distribution using three spherical waves in independent directions. The relationship between the phase difference and displacement for each pixel are determined for one beam using a reference plane. When this measurement is performed for each of three beams, the sensitivity matrix for each pixel can be obtained independently. We also proposed a phase analysis method using Fourier transform for a wave composed by three waves. Three spherical waves are irradiated onto the reference plane or an object simultaneously. The principle and the experimental results of strain measurement are shown.

Paper Details

Date Published: 11 August 2008
PDF: 9 pages
Proc. SPIE 7063, Interferometry XIV: Techniques and Analysis, 70630G (11 August 2008); doi: 10.1117/12.798316
Show Author Affiliations
Motoharu Fujigaki, Wakayama Univ. (Japan)
Kohhei Shiotani, Wakayama Univ. (Japan)
Ryosuke Kido, Wakayama Univ. (Japan)
Yoshiharu Morimoto, Wakayama Univ. (Japan)

Published in SPIE Proceedings Vol. 7063:
Interferometry XIV: Techniques and Analysis
Joanna Schmit; Katherine Creath; Catherine E. Towers, Editor(s)

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