An accurate analysis of the radiation characteristics of a plane piston transducer with phase apodization for focusing.

Abstract

A plane piston transducer can be focused by a continuous variation of the excitation signal phase (or time delay) over the transducer surface. Prior analyses of this scheme used the Fresnel approximation, thereby limiting the validity. Using the angular spectrum method, an accurate radiation model of such a transducer has been developed that includes… (More)
DOI: 10.1016/j.ultras.2012.11.001

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