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Statistical self-calibrating algorithm for phase-shift interferometry based on a smoothness assessment of the intensity offset map

Domenii publicaţii > Fizica + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Adrian Dobroiu, Dan Apostol, Victor Nascov and Victor Damian

Editorial: Measurement Science and Technology, 9 , p.1451-1455 , 1998.


By processing a set of three phase-shifted interferograms one can determine the actual phase steps between recordings by assuming that the calculated map of the intensity offset has the smallest pixel to pixel variations when the supposed values of the phase steps match the actual ones. Based on this principle a new statistical self-calibrating algorithm for phase-shift interferometry is presented. Numerous tests were carried out to check the ability of the new algorithm to find the correct values of the actual phase steps. Algorithm limitations are discussed.

Cuvinte cheie: wavefront phase, laser interferometer, phase-shift interferometry, profilometry, interferometry