A New Acoustic Imaging Device.

摘要

A new type of acoustic imaging device, which scans a large array of piezoelectric detectors is described. Scanning is carried out by a signal traveling along an acoustic surface wave delay line. The device can be electronically focused, and has given images of objects 20 cm from the detector array, illuminated with a 5 MHz acoustic wave, with a definition of 1 mm. (Author)