Ultrasonic nondiffracting transducer
US5081995A · kind A · utility
20Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 29, 1990 |
| Grant date | Jan 21, 1992 |
| Priority date | — |
| Expiry date | Jan 29, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K11/341
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An ultrasonic transducer for use in medical imaging systems includes a piezoelectric element having an active electrode formed as a series of concentric annular segments. Each segment is separately driven by a transmitter in which the amplitude and phase of the drive signals produce an ultrasonic wave having a pressure profile that approxinmates a zeroth order Bessel function. A nondiffracting beam of ultrasonic waves is produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.