Paper Titles
Characterization of the Nonlinear Shear Behaviour of UD Composite Materials Using the Virtual Fields Method
p.185
Characterisation of Interlaminar Shear Strength of a Unidirectional Carbon/Epoxy Laminated Composite under Impact Loading
p.191
Spar Corner Radius Integrity for the A400M Wing
p.197
Developments in RGB Photoelasticity
p.205
Phase-Shifting Method with Unknown Intervals in Phase-Shifting Digital Holography
p.211
Transition Saddle-Cylinder Shape of Thin Unsymmetric [0/90] Square Plates under Hygrothermal Loads: Fringe Projection Method and Variational Approach
p.217
Simultaneous Measurement of Out-of-Plane and In-Plane Displacements by Phase-Shifting Digital Holographic Interferometry
p.223
Complete Two-Dimensional Principal Stress Separation by the Photoelastic Oblique Incidence Method
p.229
Measurement of Stokes Parameters by Quarter-Wave Plate and Polarizer
p.235

Phase-Shifting Method with Unknown Intervals in Phase-Shifting Digital Holography

Article Preview

Abstract:

Displacement measurement can be performed with high accuracy using phase-shifting method. In phase-shifting method, it is often used four steps of phase-shifting for one cycle. In conventional method, to measure the displacement of an object by an interferometer, the phase of a reference beam should be shifted by every π/2 in the four-step phase-shifting. In this paper, a phase-shifting method with unknown intervals is proposed. This method does not need to shift a phase by every π/2. It can detect an intensity distribution and a phase distribution from five fringe images with equal intervals even if the phase-shift amount is unknown. Using this method, we propose a displacement measurement of phase-shifting digital holographic interferometry using spherical wave as reference wave.

You might also be interested in these eBooks
Advances in Experimental Mechanics IV View Preview

Info:

Periodical:

Applied Mechanics and Materials (Volumes 3-4)

Pages:

211-216

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.3-4.211

Citation:

Cite this paper

Online since:

August 2006

Authors:

T. Kita, Yoshiharu Morimoto, Motoharu Fujigaki, Toru Matui

Keywords:

Displacement Measurement, Phase Analysis, Phase-Shift with Equal Intervals, Phase-Shifting Digital Holography, Phase-Shifting Method with Unknown Intervals

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2005 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] P. Carré: Installation et utilisation du compateur photoélectrique et interférential du Bureau International des Poids et Mesures, Metrologia 2, (1966), pp.13-23.

DOI: 10.1088/0026-1394/2/1/005

Google Scholar

[2] J. Novak: Five-step phase-shifting algorithms with unknown values of phase shift, Optik, Vol. 114-2 (2003), pp.63-68.

DOI: 10.1078/0030-4026-00222

Google Scholar

[3] I. Yamaguchi and T. Zhang: Phase-shifting Digital Holography, Opt. Lett., Vol. 22-16(1997), pp.1268-1270.

DOI: 10.1364/ol.22.001268

Google Scholar

[4] I. Yamaguchi, S. Ohta and J. Mizuno: Surface Contouring by Phase-shifting Digital Holography, Opt. Lasers Eng., Vol. 36-5(2001), pp.417-428.

DOI: 10.1016/s0143-8166(01)00069-0

Google Scholar

[5] Y. Morimoto, T. Nomura, M. Fujigaki, S. Yoneyama and I. Takahashi: Deformation Measurement by Phase-shifting Digital Holography, Experimental Mechanics, Vol. 45-1(2005), pp.65-70.

DOI: 10.1007/bf02428991

Google Scholar

[6] Y. Morimoto, T. Nomura, M. Fujigaki and I. Takahashi: Reduction of Speckle Noise Effect by Divided Holograms, Proceedings of 12th International Conference on Experimental Mechanics, ICEM12, (2004), pp.554-555.

Google Scholar