| Autor: |
Bocoum M, Figliolia F, Huignard JP, Ramaz F, Tualle JM |
| Jazyk: |
angličtina |
| Zdroj: |
Applied optics [Appl Opt] 2023 Jun 20; Vol. 62 (18), pp. 4740-4746. |
| DOI: |
10.1364/AO.488757 |
| Abstrakt: |
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. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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