Generation of focused surface waves with a solid wedge

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buir.contributor.authorAtalar, Abdullah
buir.contributor.authorKöymen, Hayrettin
buir.contributor.orcidAtalar, Abdullah|0000-0002-1903-1240
dc.citation.epage684en_US
dc.citation.spage681en_US
dc.contributor.authorAtalar, Abdullahen_US
dc.contributor.authorKöymen, Hayrettinen_US
dc.coverage.spatialDenver, Colorado, USAen_US
dc.date.accessioned2016-02-08T12:02:47Z
dc.date.available2016-02-08T12:02:47Z
dc.date.issued1987en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.descriptionDate of Conference: 14-16 October 1987en_US
dc.descriptionConference Name: 1987 IEEE Ultrasonics Symposiumen_US
dc.description.abstractFocusing of surface acoustic waves on material surfaces was achieved by axicons in liquid immersion. The system consisted of a plane acoustic wave generator obliquely insonifying a cylindrical mirror placed perpendicularly on the surface to be examined. A similar axicon can be implemented with a solid cylindrical structure which does not require an immersion liquid. The lower cap of a solid cylinder is placed on the surface of the solid object, while the upper cap, where a shear-wave transducer is placed, is inclined with respect to the axis of the cylinder. Shear waves generated by the transducer are reflected from the free cylindrical surface of the solid. The reflected waves are incident on the bottom surface at a critical angle and couple to the object surface as surface waves to converge to a diffraction limited focus. The cylindrical solid material must be chosen from low-shear-wave-velocity materials. The critical angle determines the inclination of the top surface; it is found from the solution of reflection problem for shear waves at a solid-solid interface with a slippery boundary condition. The focusing system is implemented successfully with lucite as the solid and aluminum as the object material.en_US
dc.identifier.doi10.1109/ULTSYM.1987.199045en_US
dc.identifier.issn0090-5607en_US
dc.identifier.urihttp://hdl.handle.net/11693/27843
dc.language.isoEnglishen_US
dc.publisherIEEEen_US
dc.relation.isversionofhttps://doi.org/10.1109/ULTSYM.1987.199045en_US
dc.source.titleProceedings of the 1987 IEEE Ultrasonics Symposiumen_US
dc.subjectAcoustic imagingen_US
dc.subjectAcoustic surface wave devices - focusingen_US
dc.subjectFocused surface wavesen_US
dc.subjectSaw focusing setupen_US
dc.subjectSolid wedgeen_US
dc.subjectSurface wavesen_US
dc.titleGeneration of focused surface waves with a solid wedgeen_US
dc.typeConference Paperen_US
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