Sonic transducer array

Details Sonic transducer array Sonic transducer array

1974-10-15

1976-06-15

Farley, Richard A.

Communications: electrical

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340 5MP, 340 10, 310 91, H04R 144, H04R 1700

Patent

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039640140

ABSTRACT:
The present invention relates to a transducer array having a resolution suitable for imaging objects disposed in a liquid medium and illuminated with sonic energy of short wavelength. The array consists of a plurality of piezoelectric transducers sensing the sonic waves at their extremities and designed to produce corresponding electrical voltages suitable for image formation. While the individual transducers are fabricated from a common monolithic block, a geometry is used which reduces the coupling between the individual transducers. The individual transducers, which vibrate in a longitudinal mode with antinodes at either extremity and nodal regions at the center, are supported at their nodes by a thin web. The thin web then is the means for attaching the array to the frame of the apparatus. Central nodal support of the transducers minimizes stresses on the web from transducer vibration, reduces crosstalk, and improves the resolution of the array. Monolithic assembly permits large numbers of like transducers to be efficiently formed in an economical batch process.

REFERENCES:
patent: 3230503 (1966-01-01), Elliot, Jr. et al.

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