https://hal-iogs.archives-ouvertes.fr/hal-01443345Dubois, ArnaudArnaudDuboisLaboratoire Charles Fabry / Biophotonique - LCF - Laboratoire Charles Fabry - UP11 - Université Paris-Sud - Paris 11 - IOGS - Institut d'Optique Graduate School - CNRS - Centre National de la Recherche ScientifiqueA simplified algorithm for digital fringe analysis in two-wave interferometry with sinusoidal phase modulationHAL CCSD2017Interference microscopyFringe analysisInterferometryPhase modulation[PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics]Dubois, Arnaud2017-01-27 15:43:092022-10-06 10:44:392017-02-01 18:52:10enJournal articleshttps://hal-iogs.archives-ouvertes.fr/hal-01443345/document10.1016/j.optcom.2017.01.004application/pdf1A compact simplified algorithm for digital detection of the amplitude and phase of the interferometric signal delivered by a two-wave interferometer with sinusoidal phase modulation is presented. The algorithm consists of simple mathematical combinations of four frames obtained by integration by a camera of the time-varying intensity in an interference pattern during the four successive quarters of the modulation period. The algorithm is invariant by circular permutation of the four image frames. Any set of four consecutive frames can be used for the calculations, which simplifies the practical implementation of the method. A numerical simulation has been carried out to evaluate the efficiency of the algorithm for fringe envelope extraction in low-coherence interferometry. A theoretical analysis of the effect of noise in phase map calculation is conducted. A comparison with the conventional sinusoidal phase-shifting algorithm is made.