A simplified algorithm for digital fringe analysis in two-wave interferometry with sinusoidal phase modulation - Archive ouverte HAL Access content directly
Journal Articles Optics Communications Year : 2017

A simplified algorithm for digital fringe analysis in two-wave interferometry with sinusoidal phase modulation

(1)
1
Arnaud Dubois

Abstract

A 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.
Fichier principal
Vignette du fichier
A simplified algorithm... (Opt. comm).pdf (15.23 Mo) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-01443345 , version 1 (27-01-2017)

Identifiers

Cite

Arnaud Dubois. A simplified algorithm for digital fringe analysis in two-wave interferometry with sinusoidal phase modulation. Optics Communications, 2017, 391, pp.128-134. ⟨10.1016/j.optcom.2017.01.004⟩. ⟨hal-01443345⟩
176 View
266 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More