- Restrictions on Access:
- Unclassified, Unlimited, Publicly available.
- An ultrasonic transducer that produces an output that is a symmetrical function comprises a piezoelectric crystal with several concentric ring electrodes on one side of the crystal. A resistor network applies different amplitudes of an ac source to each of the several electrodes. A plot of the different amplitudes from the outermost electrode to the innermost electrode is the first half of a Gaussian function. Consequently, the output of the crystal from the side opposite the electrodes has a Gaussian profile.
- Document ID: 19840014864.
Accession ID: 84N22932.
- No Copyright.
View MARC record | catkey: 15971633