Frequency-controlled scanning of ultrasonic beams
US4350917A · kind A · utility
33Cited by
12References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 9, 1980 |
| Grant date | Sep 21, 1982 |
| Priority date | — |
| Expiry date | Jun 9, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K11/34
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An ultrasonic wave transducer is formed from a body of piezoelectric material having nonuniform thickness. Each location on the transducer is resonant at a different frequency according to the thickness at that point. By changing the frequency of the applied excitation signal, the origin and direction of the radiation can be altered.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.