Article Dans Une Revue Applied optics Année : 2023

Suppression of the Talbot effect in Fourier transform acousto-optic imaging

François Figliolia
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Jean-Pierre Huignard
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François Ramaz
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Résumé

We report on the observation and correction of an imaging artifact attributed to the Talbot effect in the context of acousto-optic imaging using structured acoustic waves. When ultrasound waves are emitted with a periodic structure, the Talbot effect produces π -phase shifts of that periodic structure at every half of the Talbot distance in propagation. This unwanted artifact is detrimental to the image reconstruction, which assumes near-field diffraction is negligible. Here, we demonstrate both theoretically and experimentally how imposing an additional phase modulation on the acoustic periodic structure induces a symmetry constraint leading to the annihilation of the Talbot effect. This will significantly improve the acousto-optic image reconstruction quality and allows for an improvement of the reachable spatial resolution of the image.

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Dates et versions

hal-04303757 , version 1 (30-11-2023)

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Maïmouna Bocoum, François Figliolia, Jean-Pierre Huignard, François Ramaz, Jean-Michel Tualle. Suppression of the Talbot effect in Fourier transform acousto-optic imaging. Applied optics, 2023, 62 (18), pp.4740. ⟨10.1364/AO.488757⟩. ⟨hal-04303757⟩
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