Figure 8
From: Non-contact ultrasonic inspection by Gas-Coupled Laser Acoustic Detection (GCLAD)

Plate with indications regarding position of the artificial defects: defects on the upper surface are depicted in black, in white on the inferior face.
From: Non-contact ultrasonic inspection by Gas-Coupled Laser Acoustic Detection (GCLAD)

Plate with indications regarding position of the artificial defects: defects on the upper surface are depicted in black, in white on the inferior face.