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US 4,378,699 AGranted
Scanning acoustic microscope
AssigneeNational Research Development Corporation
InventorHemantha K. Wickramasinghe
Life of this patent
Estimating the term…
Abstract
A scanning acoustic microscope comprises transducer means (10, 12, 14) to provide a convergent beam of acoustic radiation; means (20, 22) to cause relative movement in the focal plane of the focus of the beam and a sample (16); transducer means (10, 12, 14) to receive acoustic radiation modulated by the sample near the beam focus; and means (30) to supply a pressurized gas to a volume surrounding the transducer means and the sample.
Claims12
A scanning acoustic mircoscope comprising:
- transducer means for providing a convergent beam of acoustic radiation;
- means for causing relative movement in the focal plane of the focus of said beam and a sample under investigation;
- transducer means for receiving acoustic radiation modulated by the sample near the beam focus;
- and
- means for supplying a gas at higher than atmospheric pressure to a volume between surrounding the transducer means and the sample.
2 more elements
Dependencies are inferred from the claim text.