Steering, angled wedge

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.

1. All elements of the probe are fired at the same time. The waves all follow parallel paths
2. The wave front is perpendicular to the individual wave paths in the wedge
3. The angle of the beam, which is perpendicular to the wave front, is the same as the one from the individual waves
4. The elements are fired in a specific sequence. The waves all follow parallel paths
5. The wave front in the wedge is not perpendicular to the individual wave paths
6. The beam is perpendicular to the wave front and its angle different from the angle of the wave paths
7. 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.