Abstract
The combination of speckle pattern interferometry and temporal phase unwrapping allows the measurement of large-object dynamic displacements without the propagation of spatial unwrapping errors. For retrieving phase data for whole-object displacement, the temporal Fourier transform method is a commonly used approach. As the temporal Fourier transform method can be applied with or without introducing a temporal carrier in one of the beams in an interferometer, this paper presents a comparison of both phase measurement techniques. The analysis is performed using computer-simulated speckle interferograms, an approach that allows to know precisely the original phase distribution and also to evaluate the spatial rms phase error as a function of the phase change introduced between two consecutive speckle interferograms. The performance of the temporal Fourier transform method to process experimental data modulated by a temporal carrier is also illustrated using results obtained from the study of a metal plate subjected to thermal loading.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
