Accurate phase-shifting digital interferometry.
In phase-shifting interferometry experiments, the accuracy of the phase shift is a major issue. Many experimental and data analyses are done to cancel phase-shift errors inherent to the modulation techniques used. We propose to remove most of the phase-shift error by recourse to a frequency-shifting method. This approach can be applied to both holography and interferometry. We validate the idea with a holographic experiment.
Atlan
M
M
Ecole Normale Supérieure, Laboratoire Kastler-Brossel, UMR 8552 Université Pierre et Marie Curie, Paris Cedex 05, France. atlan@optique.espci.fr
Gross
M
M
Absil
E
E