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Table 2 Resolution and penetration depth of an acoustic microscopea

From: Scanning acoustic microscopy for material evaluation

Frequency (MHz) Penetration depth (mm) Theoretical lateral resolution (μm) Focal length (mm)
5 15.0 300 19.0
10 10.0 150 15.0
15 5.1 100 19.0
20 4.1 75 15.0
25 4.1 60 15.0
30 3.4 50 12.7
40 5.4 38 20.0
75 3.4 20 12.7
80 2.2 19 8.0
100 0.4 15 1.5
110 2.2 14 8.0
120 2.2 12 8.0
200 0.3 8 7
1000 0.025 1.5 0.08
2000 0.010 0.7 0.05
  1. asome data courtesy of Kramer Scientific Instruments System