Electronically simulated rotating prism for ultrasonic beam scanning
US4324140A · kind A · utility
7Cited by
14References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 31, 1980 |
| Grant date | Apr 13, 1982 |
| Priority date | — |
| Expiry date | Jul 31, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S15/8965
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus are described for electronically scanning a spherily focused beam in a c-scan mode using a spiral path rather than a traditional raster scan pattern. Essential to the technique is an electronically simulated rotating ultrasonic prism operating according to the general electrical input equation V.sub.IN =V.sub.o exp (i.omega..sub.o t+iA cos .OMEGA.t). The technique allows use of a single delay line with simple connections and no requirements of multiple mixing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.