Electronically adjustable mechanical lens for ultrasonic linear array and phased array imaging

摘要

An electronically adjustable mechanical lens for ultrasonic linear array and phased array imaging having strip-like electrodes in the longitudinal direction of the array. Electronic delays are applied to signals going to or coming from the electrodes in both the transverse plane and the longitudinal plane to correct for phase errors which would normally occur when the mechanical lens is out of focus. This results in increased depth of field for the transducer lens.