Distance Sensors

Measurements can be performed only in two-dimensional planes using the visual sensors described above. It is thus possible to measure only two-dimensional (2-D) or stepped (21/2-D) objects. In order to perform a threedimensional (3-D) measurement of workpieces with optical sensors, an additional process is required to measure the third coordinate. Since the sensors used for this purpose detect the distance to the surface of the workpiece, they are commonly referred to as “distance sensors”.