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Nominal Specifications of Ultrasonic Objectives Used.
| Focal length (mm) |
Lateral resolution (µm) |
Half-aperture angle (°) |
Frequency range at —6-dB amplitude (MHz) |
|
|---|---|---|---|---|
| Transducer 1 | 12.7 | 100 | 13.4 | 20.6 to 40.3 |
| Transducer 2 | 8.0 | 50 | 10.0 | 27.1 to 87.5 |
