Measurement of Three-Dimensional Deformations by Phase-Shifting Digital Holographic Interferometry

Out-of-plane deformations of a cantilever were measured using phase-shifting digital holographicinterferometry (PSDHI) and the Fourier transform method (FTM). The cantilever was recorded in twodifferent states, and holograms were stored electronically with a charge-coupled device (CCD) camera.When t...

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Bibliographic Details
Published inScience Diliman Vol. 15; no. 1; pp. 32 - 36
Main Authors Percival Almoro, Marilou Cadatal, Marlon Rosendo Daza
Format Journal Article
LanguageEnglish
Published University of the Philippines 01.06.2003
Subjects
Fourier transform method
FTM
phase-shifting digital holographic interferometry
PSDHI
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Summary:Out-of-plane deformations of a cantilever were measured using phase-shifting digital holographicinterferometry (PSDHI) and the Fourier transform method (FTM). The cantilever was recorded in twodifferent states, and holograms were stored electronically with a charge-coupled device (CCD) camera.When the holograms are superimposed and reconstructed jointly, a holographic interferogram results.The three-dimensional (3D) surface deformations were successfully visualized by applying FTM toholographic interferogram analysis. The minimum surface displacement measured was 0.317 µm. Theprocessing time for the digital reconstruction and visualization of 3D deformation took about 1 minute.The technique was calibrated using Michelson interferometry setup.
ISSN:0115-7809
2012-0818