Study of acoustic signatures for non-spherical ...
Document type :
Autre communication scientifique (congrès sans actes - poster - séminaire...): Communication dans un congrès avec actes
Title :
Study of acoustic signatures for non-spherical curved acoustic lens
Author(s) :
Xu, Wei Jiang [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Ourak, Mohamed [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Ouaftouch, Mohammadi [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Nongaillard, Bertrand [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]

Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Ourak, Mohamed [Auteur]

Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Ouaftouch, Mohammadi [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Nongaillard, Bertrand [Auteur]

Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Conference title :
Proceedings of IEEE Ultrasonics Symposium ULTSYM-94
City :
Cannes
Country :
France
Start date of the conference :
1993-10-31
Publisher :
IEEE
HAL domain(s) :
Sciences de l'ingénieur [physics]
English abstract : [en]
In this paper, we first evaluate the Acoustical Material Signature used in acoustic microscopy by a method based on the Rayleigh-Sommefeld field integration. Different to the conventional geometry ray or Fourier optics ...
Show more >In this paper, we first evaluate the Acoustical Material Signature used in acoustic microscopy by a method based on the Rayleigh-Sommefeld field integration. Different to the conventional geometry ray or Fourier optics method the field integration method needs no approximate conditions and can take into consideration the near field phenomenon and the diffraction effect in an acoustic lens. Moreover, with this model, the lens can have any special designed geometry. Using this method, we compared the calculated results with that of the experimental ones obtained from a three-layered bonding structure, the concordance is very significant. We then take the case of a conical ring lens which is convenient to the selected Lamb wave excitation and detection for a multilayered structure. A physical model is given to explain the fringes obtained in V(z) curve using such a lensShow less >
Show more >In this paper, we first evaluate the Acoustical Material Signature used in acoustic microscopy by a method based on the Rayleigh-Sommefeld field integration. Different to the conventional geometry ray or Fourier optics method the field integration method needs no approximate conditions and can take into consideration the near field phenomenon and the diffraction effect in an acoustic lens. Moreover, with this model, the lens can have any special designed geometry. Using this method, we compared the calculated results with that of the experimental ones obtained from a three-layered bonding structure, the concordance is very significant. We then take the case of a conical ring lens which is convenient to the selected Lamb wave excitation and detection for a multilayered structure. A physical model is given to explain the fringes obtained in V(z) curve using such a lensShow less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Internationale
Popular science :
Non
Source :