Steering, angled wedge
PAUT obeys Snell’s law. Each individual UT wave obey Snell’s law. The wave front obey Snell’s law. Hence, if the wave front is oriented at a given angle in the wedge, its resulting angle in the part can be calculated with Snell’s law.
- All elements of the probe are fired at the same time. The waves all follow parallel paths
- The wave front is perpendicular to the individual wave paths in the wedge
- The angle of the beam, which is perpendicular to the wave front, is the same as the one from the individual waves
- The elements are fired in a specific sequence. The waves all follow parallel paths
- The wave front in the wedge is not perpendicular to the individual wave paths
- The beam is perpendicular to the wave front and its angle different from the angle of the wave paths
- By changing the firing order of the elements, it is possible to produce a beam at a different angle
The S-Scan is composed of several beams, each steered at a specific angle.