A new focusing method for nondestructive evaluation by surface acoustic wave
- 1 January 1984
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 55 (1) , 75-79
- https://doi.org/10.1063/1.332852
Abstract
The focalization of surface acoustic wave on piezoelectric substrates has been largely studied. It is of great interest, in the nondestructive testing area, to use focused surface acoustic waves to monitor defects like cracks which are hardly detected by acoustic bulk waves. In this paper, a new method for nondestructive testing is reported, which uses cylindrically focused surface acoustic beams. This allows for an increase in sensitivity in the detection mode and in spatial resolution in the imaging mode. Using a very simple geometrical model, the resolution and conversion efficiency of the system are estimated.This publication has 12 references indexed in Scilit:
- High resolution acoustic microscopy in superfluid heliumApplied Physics Letters, 1983
- Integrated Circuit Inspection Via Acoustic MicroscopyIEEE Transactions on Sonics and Ultrasonics, 1983
- SAW dispersion and film-thickness measurement by acoustic microscopyApplied Physics Letters, 1979
- Acoustical image reconstruction in parallel-processing analog electronic systemsJournal of Applied Physics, 1979
- Visualization of thick specimens using a reflection acoustic microscopeJournal of Applied Physics, 1979
- The design of efficient broadband wedge transducersApplied Physics Letters, 1978
- Characteristics of Wedge Transducers for Acoustic Surface WavesIEEE Transactions on Sonics and Ultrasonics, 1975
- Optoacoustic testing of microsound devicesJournal of Applied Physics, 1974
- Unified theory of Rayleigh-angle phenomena for acoustic beams at liquid-solid interfacesApplied Physics A, 1973
- Surface elastic wavesProceedings of the IEEE, 1970