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Accurate phase-shifting digital interferometry

2007; Optica Publishing Group; Volume: 32; Issue: 11 Linguagem: Inglês

10.1364/ol.32.001456

1539-4794

Michaël Atlan, M. Groß, E. Absil,

Image Processing Techniques and Applications

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.