Accurate phase-shifting digital interferometry

Michael Atlan (1) , Michel Gross (1) , Emilie Absil (2)

1 LKB (Lhomond) - Laboratoire Kastler Brossel
2 Laboratoire Photons Et Matière

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.

Domaines: Optique [physics.optics]

Michael Atlan, Michel Gross, Emilie Absil. Accurate phase-shifting digital interferometry. Optics Letters, 2007, 32 (11), pp.1456. ⟨hal-00265964⟩