Title :
Nonuniform velocity distribution on the surface of ultrasonic transducers as a source of non-diffracting beams
Author :
Kielczynski, P. ; Pajewski, W. ; Szalewski, M.
Author_Institution :
Inst. of Fundamental Technol. Res., Acad. of Sci., Warsaw, Poland
Abstract :
The exact formulae for the transfer function in the case of circular Bessel and Gaussian transducers have been developed. The computer program and analytical formulae obtained permit the calculation of the directivity patterns in the near field and far field, respectively. Satisfactory agreement of calculated and measured directivity patterns is noted
Keywords :
acoustic arrays; acoustic field; acoustic radiators; transfer functions; ultrasonic transducers; ultrasonic velocity; Bessel transducers; Gaussian transducers; circular transducers; computer program; directivity patterns; far field; near field; nonuniform velocity distribution; source of nondiffracting beams; surface; transfer function; ultrasonic transducers; Shape; Ultrasonic transducers;
Conference_Titel :
Ultrasonics Symposium, 1992. Proceedings., IEEE 1992
Conference_Location :
Tucson, AZ
Print_ISBN :
0-7803-0562-0
DOI :
10.1109/ULTSYM.1992.275909
