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dc.contributor.authorAtalar, Abdullah
dc.contributor.authorKoymen, H.
dc.date.accessioned2019-03-28T06:33:19Z
dc.date.available2019-03-28T06:33:19Z
dc.date.issued1987-01
dc.identifier.issn0885-3010
dc.identifier.urihttp://hdl.handle.net/11693/50774
dc.description.abstractUltrasonic axicons generate waves which focus on a line. They are used in various imaging applications as hulk wave focusing devices with a very long depth of focus. A new type of conical axicon is introduced. It consists of a concave parabolic surface immersed in a liquid medium and insonified obliquely by wavefronts generated by a plane transducer. The parabolic cylinder can be approximated by a portion of a circular cylinder without losing significantly in the focusing performance of the axicon. It is also shown that conical axicons can be used to excite surface waves provided that the cone angle of the axicon coincides with the Rayleigh critical angle of the liquid-solid interface. The generated surface waves focus into a diffraction-limited spot. This new surface wave focusing scheme is easy to use and has a conversion efficiency and sensitivity far better than other existing techniques.en_US
dc.language.isoEnglishen_US
dc.source.titleIEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Controlen_US
dc.relation.isversionofhttps://doi.org/10.1109/T-UFFC.1987.26911en_US
dc.subjectSurface acoustic wave devicesen_US
dc.subjectAcoustic wavesen_US
dc.subjectSurface acoustic wavesen_US
dc.subjectFocusingen_US
dc.subjectAcoustic transducersen_US
dc.subjectSurface wavesen_US
dc.subjectImage convertersen_US
dc.subjectLensesen_US
dc.subjectSurface cracksen_US
dc.subjectAcoustic signal detectionen_US
dc.titleUse of a conical axicon as a surface acoustic wave focusing deviceen_US
dc.typeArticleen_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.citation.spage53en_US
dc.citation.epage63en_US
dc.citation.volumeNumber34en_US
dc.citation.issueNumber1en_US
dc.identifier.doi10.1109/T-UFFC.1987.26911en_US
dc.publisherIEEEen_US
dc.identifier.eissn1525-8955


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