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Phase measurement in temporal speckle pattern interferometry: comparison between the phase-shifting and the Fourier
Guillermo H Kaufmann1, Gustavo E Galizzi
1Instituto de Física Rosario, Bvd. 27 de Febrero 210 bis, Rosario S2000EZP, Argentina. guille@ifir.edu.ar
Applied Optics
|December 13, 2002
Summary
This study compares two temporal phase measurement methods for dynamic displacement analysis using speckle pattern interferometry. Both methods accurately measure large-object displacements, with performance evaluated via simulations and experimental data from a carbon fiber panel.
Area of Science:
- Optical Metrology
- Materials Science
Background:
- Speckle pattern interferometry enables dynamic displacement measurement.
- Temporal phase unwrapping overcomes spatial error propagation in large-object displacement analysis.
Purpose of the Study:
- Compare temporal phase-shifting and temporal Fourier transformation for dynamic displacement measurement.
- Evaluate precision and execution speed of both methods.
- Analyze performance using simulated and experimental data.
Main Methods:
- Speckle pattern interferometry with a temporal carrier.
- Temporal phase-shifting method.
- Temporal Fourier transformation approach.
- Analysis using computer-simulated speckle interferograms.
- Experimental validation on a carbon fiber panel.
Main Results:
- Both temporal phase measurement methods successfully retrieve whole-object displacement data.
- The study quantifies spatial RMS phase error as a function of phase change.
- Performance comparison in terms of precision and speed is presented.
- Method effectiveness demonstrated on high-speed experimental data.
Conclusions:
- Temporal phase unwrapping is effective for large-object displacement fields.
- The study provides a comparative analysis of two key temporal phase measurement techniques.
- The findings are applicable to high-speed dynamic displacement analysis in materials like carbon fiber panels.