Table 2 Resolution and penetration depth of an acoustic microscopea
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 |