851231.fig.007
Figure 7: Results of two-dimensional scans obtained for sample with weld: (a) amplitude of measured signal | 𝑈 ( 𝑥 , 𝑦 ) | , (b) phase of measured signal 𝜑 ( 𝑥 , 𝑦 ) , (c) real part of measured signal R e ( 𝑈 ( 𝑥 , 𝑦 ) ) , (d) imaginary part of measured signal I m ( 𝑈 ( 𝑥 , 𝑦 ) ) , (e) amplitude of gradient of measured signal | 𝜕 𝑈 ( 𝑥 , 𝑦 ) / 𝜕 𝑥 | , (f) phase of gradient of measured signal 𝜕 𝜑 ( 𝑥 , 𝑦 ) / 𝜕 𝑥 , (g) real part of gradient of measured signal R e ( 𝜕 𝑈 ( 𝑥 , 𝑦 ) / 𝜕 𝑥 ) , and (h) imaginary part of measured signal Im ( 𝜕 𝑈 ( 𝑥 , 𝑦 ) / 𝜕 𝑥 ) .