ULTRASONIC SYSTEM FOR THE VISUALISATION OF A NARROW CROSS-SECTIONAL SLICE OF A BODY

摘要

The invention relates to ultrasonic systems for the visual display of a thin section of a body. The subject of the invention is a system wherein the multi-element scanning probe which picks up or transmits the ultrasonic energy cooperates with an array of elastic-surface-wave transducers and with a group of frequency converter circuits in order to constitute an ultrasonic lens. The invention is more particularly applicable to the non-destructive examination of bodies permeable to ultrasonic energy such as is practiced for example in medicine and when industrial goods are being checked.