高聚焦超声脉冲的时间分辨定量多相干涉成像
Time-resolved quantitative multiphase interferometric imaging of a highly focused ultrasound pulse
摘要：
干涉成像是通过在CCD相机上混合图像波前与参考波前来成像相位物体的成熟方法。它也被应用于快速瞬态现象，主要是通过分析单个干涉图。结果表明，对于重复现象，多相采集带来了显着的优势。作为一个例子，1 MHz的聚焦声场发射的半球形压电换能器在水中成像。定量图像分析提供高分辨率声场轮廓。通过这种方法确定的焦点处的压力与光纤探头水听器的测量结果一致。这证实了多相干涉成像确实可以提供定量测量。
英文摘要：
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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