Yaralıoğlu, Göksen GökseninAtalar, AbdullahKöymen, Hayrettin2016-02-082016-02-0819941051-0117http://hdl.handle.net/11693/27782Date of Conference: 31 October-3 November 1994Conference Name: 1994 IEEE Ultrasonics SymposiumIn this paper a new lens design is proposed for characterization of layered materials. Lamb wave lens employs Lamb waves for this purpose since these waves propagate along interfaces. However, below cut-off angle, the critical angles of Lamb wave modes are low and the generated V(z) curves have small number of oscillations, which in turn causes measurement difficulties and accuracy degradation. Bi-angular lens described in this paper, generates an extra obliquely incident wave, instead of normally incident beam, in order to provide the reference specular reflection. Simulation results as well as experimental results are presented and it is shown that a high sensitivity can be obtained by using this new lens.EnglishAcoustic variables measurementAcoustic wave reflectionAcoustic wave transmissionAcoustic wave velocityCharacterizationLensesMaterialsMathematical modelsOscillationsSensitivity analysisBi-angular lensInterference patternLamb wavesLeaky wave velocity extractionMaterial characterizationAcoustooptical devicesConference Paper10.1109/ULTSYM.1994.401852