ULTRASOUND ECHOGRAPHY DEVICE COMPRISING A LINEAR ARRAY OF PIEZOELECTRIC TRANSDUCERS,AND METHOD OF MANUFACTURING SUCH AN ARRAY

摘要

Ultrasound scan means 10 comprising a linear array 11 of transducers piezoelectric 12 disposed, parallel to a direction y, along a direction x perpendicular to the y direction, the transducers piezoelectric being biased so that the diagram of directivity of the bar 11 present of the secondary lobes attenuated. According to the invention, the ultrasonic ultrasound scan 10 comprising an acoustic lens 13 is also cylindrical, adjoining to said bar, and whose generators are parallel to the x direction, each transducer piezoelectric 12 comprises, along the y direction, a profile of polarization, taking into account the effect of antiapodisation of the absorption inhomogeneous of said lens 13 in the direction y. / p & & p & application to transmission - reception devices for an ultrasonic echographic of biological tissues.