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- W2264690946 abstract "Ultrasonic imaging transducers have been proposed in which a piezoelectric plate is used in conjunction with a Fresnel Zone Plate (FZP) to produce a focused beam of ultrasound. Focusing is achieved with these devices by activating the piezoelectric plate with an electrode pattern in the shape of an FZP. The focal plane distribution of these transducers cannot, in general, be predicted by diffraction theory alone. This is because the acoustic field pattern in front of the transducer is not an exact replica of the FZP electrode pattern. In this paper we show that elastic wave generation and propagation inside the piezoelectric plate cause the acoustic field pattern directly in front of the plate to differ from the electrode pattern. These effects are called mechanical aberrations. We show that mechanical aberrations cause the focal plane distribution to be broader than that predicted by diffraction theory. The effects on resolution of material properties and other device parameters are discussed. Experimental results are also presented." @default.
- W2264690946 created "2016-06-24" @default.
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- W2264690946 date "1982-01-01" @default.
- W2264690946 modified "2023-09-26" @default.
- W2264690946 title "Effect of Mechanical Aberrations on the Resolution of Fresnel Zone Plate Transducers" @default.
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- W2264690946 doi "https://doi.org/10.1007/978-1-4684-1137-9_30" @default.
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