Title :
Novel variable-focus ultrasonic transducer
Author :
Bennett, S.D. ; Chambers, Jonathon
Author_Institution :
University College London, Department of Electronic & Electrical Engineering, London, UK
Abstract :
A focusing p.v.f.2 transducer is described. By controlled deformation of a stretched p.v.f.2 membrane, the focal spot may be scanned axially. This action is demonstrated and is shown to correspond well with the predictions of simple theory. There are potential applications for such a device in medical imaging.
Keywords :
biomedical ultrasonics; focusing; piezoelectric transducers; ultrasonic transducers; medical imaging; polyvinylidene fluoride membrane; variable focus ultrasonic transducer;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19770077
