A Novel Algorithm to Calculating Spatial Impulse Responses Based on Annular Planar Transducers

Abstract

Limited diffracting waves which have great application potential for field focus depth enlargement in acoustic imaging systems. The calculation of limited diffracting waves acoustic fields is most often based on the spatial impulse response approach as suggested by field is found from a convolution between the acceleration of Tupholme and Stepanishen. This paper shows the limited diffracting waves acoustic based on annular planar transducers, it can be found from the crossings between the boundary of the aperture and a spherical wave emitted from the field point onto the plane of the emitting aperture. Summing the angles of the arcs within the aperture readily yields the spatial impulse response for a point in space. The approach not only make it easy to calculate of limited diffracting waves acoustic fields but also improve the accuracy of simulation results of acoustic fields.