Compound focus ultrasonic transducer
US4659956A · kind A · utility
11Cited by
7References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 3, 1986 |
| Grant date | Apr 21, 1987 |
| Priority date | — |
| Expiry date | Apr 3, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2217/03
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Improved focussing and increased bandwidth is obtained in a single-element ultrasonic transducer for non-destructive evaluation and material characterization applications. The piezoelectric ceramic element has a radius of curvature R.sub.1, and a combination lens and cover layer on its front surface has a radius of curvature R.sub.2 which is less than R.sub.1. The depth of field of the transducer is increased and the bandwidth improved; the total thickness of the lens may be selected to control bandwidth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.