Science Diliman, Vol 10, No 2 (1998)

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Measurement of Microscopic Deformations Using Double-Exposure Holographic Interferometry and the Fourier Transform Method

Percival Almoro, Marlon Rosendo Daza

Abstract


Microscopic deformations on the surface of a circular diaphragm were measured using double exposure holographic interferometry and Fourier transform method (FTM). The three-dimensional surface deformations were successfully visualized by applying FTM to holographic interferogram analysis. The minimum surface displacement measured was 0.317 µm. This was calibrated via the Michelson interferometry technique.

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