Title :
Parametric transducer for high-speed real-time acoustic imaging
Author :
Sabet, C. ; Turner, C.W.
Author_Institution :
King´s College London, Department of Electrical & Electronic Engineering, London, UK
Abstract :
The letter reports the development of a novel high-speed scanning acoustic imaging system, potentially suitable for medical diagnosis, nondestructive testing and acoustic microscopy. The key element of this system is a parametric transducer, consisting of a photoconductor-piezoelectric sandwich in which the nonlinear behaviour is the basis of an optical-readout method. Preliminary measurements at 2.7 MHz have indicated that the sensitivity is better than 0.2 ¿W/cm2, and a resolution approaching the expected limiting value of 0.7 mm has been achieved.
Keywords :
acoustic imaging; microscopy; nondestructive testing; patient diagnosis; photoconducting devices; piezoelectric transducers; acoustic microscopy; high speed real time acoustic imaging; medical diagnosis; nondestructive testing; optical readout method; parametric transducer; photoconductor piezoelectric sandwich;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19760035
