Strain distribution measurement by digital holographic interferometry using three spherical waves

Motoharu Fujigaki; Kohhei Shiotani; Ryosuke Kido; Yoshiharu Morimoto

doi:10.1117/12.798316

11 August 2008 Strain distribution measurement by digital holographic interferometry using three spherical waves

Motoharu Fujigaki, Kohhei Shiotani, Ryosuke Kido, Yoshiharu Morimoto

Proceedings Volume 7063, Interferometry XIV: Techniques and Analysis; 70630G (2008) https://doi.org/10.1117/12.798316
Event: Optical Engineering + Applications, 2008, San Diego, California, United States

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.

Citation Download Citation

Motoharu Fujigaki, Kohhei Shiotani, Ryosuke Kido, and Yoshiharu Morimoto "Strain distribution measurement by digital holographic interferometry using three spherical waves", Proc. SPIE 7063, Interferometry XIV: Techniques and Analysis, 70630G (11 August 2008); https://doi.org/10.1117/12.798316

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