Generalized phase-shifting algorithm for inhomogeneous phase shift and spatio-temporal fringe visibility variation
What's it about?
Usually, phase-shifting algorithms assume that the phase shift is a linear function of time and space. Unfortunately, this requirement is not always satisfied in practice.
Why is it important?
This paper proposes a phase-shifting algorithm used when the phase shift is unknown and nonlinear in both time and space. Particularly, this algorithm is suitable in practice when nonlinear or miscalibrated phase shifters are used. Due to the useful properties of this algorithm such as the robustness, computational efficiency, and user-free execution, this proposal could be used in automatic applications.