Temporal demodulation of fringe patterns using continuous phase curvature constraint

摘要

In this work we present a sequential technique for temporal fringe pattern demodulation without carrier. The technique presented here, uses a temporal frequency estimator to obtain the temporal phase from a interferogram sequence. The restriction used to estimate the frequency is based on second order potentials in order to obtain the temporal phase as a phase function in an space C~2. The importance of this technique to demodulate temporal fringe patterns without carrier is mainly the simplification of experimental optical arrays in laboratory, where the experimental nature make it difficult to introduce a carrier frequency. This work present an on development technique for temporal demodulation, however, its projection on future work give us the possibility to obtain a robust demodulation method for temporal interferograms. To demonstrate the performance of this temporal fringe pattern demodulation technique, we are going to show a simulated interferogram sequence to demodulate it with this technique.