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Acoustooptic pulse-echo transducer system
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Claus, R. O. Wade, J. C. |
| Copyright Year | 1983 |
| Description | A pulse-echo transducer system which uses an ultrasonic generating element and an optical detection technique is described. The transmitting transducer consists of a concentric ring electrode pattern deposited on a circular, X-cut quartz substrate with a circular hole in the center. The rings are independently pulsed with a sequence high voltage signals phased in such a way that the ultrasonic waves generated by the separate rings superimpose to produce a composite field which is focused at a controllable distance below the surface of the specimen. The amplitude of the field reflected from this focus position is determined by the local reflection coefficient of the medium at the effective focal point. By processing the signals received for a range of ultrasonic transducer array focal lengths, the system can be used to locate and size anomalies within solids and liquids. Applications in both nondestructive evaluation and biomedical scanning are suggested. |
| File Size | 889978 |
| Page Count | 22 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19850019912 |
| Archival Resource Key | ark:/13960/t58d4r83f |
| Language | English |
| Publisher Date | 1983-09-30 |
| Access Restriction | Open |
| Subject Keyword | Electronics And Electrical Engineering Pulse Amplitude Nondestructive Tests Scanning Sound Transducers Reflected Waves Optical Equipment Ultrasonic Radiation Optical Reflection Echo Sounding Interferometry Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
