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

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

2010-11-10

arxiv.org/abs/1011.2298v1

Applied Optics 49, 31 (2010) 6127-6133

Physics

Optics

Scientific paper

10.1364/AO.49.006127

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.

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