Measurement of 3-D deformations by phase-shifting digital holographic interferometry

Authors

Percival F. Almoro ⋅ PH National Institute of Physics, University of the Philippines Diliman
Marilou M. Cadatal ⋅ PH National Institute of Physics, University of the Philippines Diliman
Marlon Rosendo H. Daza ⋅ PH National Institute of Physics, University of the Philippines Diliman

Abstract

Out-of-plane deformations of a cantilever were measured using phase-shifting digital holographic interferometry (PSDHI) and the Fourier transform method (FTM). The cantilever was recorded in two different 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 to holographic interferogram analysis. The minimum surface displacement measured was 0.317 μm. The processing time for the digital reconstruction and visualization of 3D deformation took about one minute. The technique was calibrated using a Michelson interferometry setup.

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Issue

2001: Proceedings of the 19th Samahang Pisika ng Pilipinas Philippine Physics Congress

Article ID

SPP-2001-W2A-6

Section

Lasers and Applications

Published

2001-10-24

How to Cite

[1]

PF Almoro, MM Cadatal, and MRH Daza, Measurement of 3-D deformations by phase-shifting digital holographic interferometry, Proceedings of the Samahang Pisika ng Pilipinas 19, SPP-2001-W2A-6 (2001). URL: https://proceedings.spp-online.org/article/view/SPP-2001-W2A-6.