Time-resolved quantitative multiphase interferometric imaging of a highly focused ultrasound pulse

Fabien Souris (1) , Jules Grucker (1) , Philippe Jacquier (1) , Jacques Dupont-Roc (1) , Arnaud Arvengas (2) , Frédéric Caupin (2)

1 LKB (Lhomond) - Laboratoire Kastler Brossel
2 LPS - Laboratoire de Physique Statistique de l'ENS

Interferometric imaging is a well established method to image phase objects by mixing the image wavefront with a reference one on a CCD camera. It has also been applied to fast transient phenomena, mostly through the analysis of single interferograms. It is shown that for repetitive phenomena multiphase acquisition brings significant advantages. A 1 MHz focused sound field emitted by a hemispherical piezotransducer in water is imaged as an example. Quantitative image analysis provides high resolution sound field profiles. Pressure at focus determined by this method agrees with measurements from a fiber-optic probe hydrophone. This confirms that multiphase interferometric imaging can indeed provide quantitative measurements.

Mots clés: Inverse problems; Phase measurement; Interferometric imaging; Phase unwrapping; Pressure measurement

Domaines: Optique [physics.optics]

Fabien Souris, Jules Grucker, Philippe Jacquier, Jacques Dupont-Roc, Arnaud Arvengas, et al.. Time-resolved quantitative multiphase interferometric imaging of a highly focused ultrasound pulse. Applied optics, 2010, 49 (31), pp.6127-6133. ⟨10.1364/AO.49.006127⟩. ⟨hal-00534036⟩