Linear scanning method based on the SAFT coarray

This work presents a method to obtain B‐scan images based on linear array scanning and 2R‐SAFT. Using this technique some advantages are obtained: the ultrasonic system is very simple; it avoids the grating lobes formation, characteristic in conventional SAFT; and subaperture size and focussing lens (to compensate emission‐reception) can be adapted dynamically to every image point. The proposed method has been experimentally tested in the inspection of CFRP samples.