Ultrasonic electronic lens with reduced delay range
US4058003A · kind A · utility
60Cited by
6References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 21, 1976 |
| Grant date | Nov 15, 1977 |
| Priority date | — |
| Expiry date | Jul 21, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S367/903
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Ultrasonic reflections are received by a transducer array whose resultant signals are passed through an array of time-varying delay lines to provide focusing at all depths. The delay lines are made up of a combination of two components, one increasing and one decreasing with the distance to the axis of the array. This combination minimizes the range of delay variations required over the depth range. When using charge coupled devices as delay elements, this combination minimizes the required range of clock frequencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.