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- Title
Acoustic Microscope operating at 100 MHz.
- Authors
KORPEL, A.; KESSLER, L. W.; PALERMO, P. R.
- Abstract
THE concept of acoustic microscopy is not new1, but the means for constructing a working device are only now becoming available2,3. As acoustic microscopy relies on mechanical vibration, rather than electromagnetic radiation, it may be possible to visualize features of a specimen which go undetected by conventional methods. The lower propagation velocity of sound compared with that of light, in all known materials, results in a corresponding reduction in wavelength for a given frequency of excitation. The theoretically attainable resolution with acoustic microscopy is limited by the angular aperture and the wavelength in a manner entirely analogous to the optical situation. Present ultrasonic technology limits the upper frequency attainable to about 10 GHz which corresponds to a wavelength of 3000-6000 Å in most solids and 1000-2000 Å in most liquids.
- Publication
Nature, 1971, Vol 232, Issue 5306, p110
- ISSN
0028-0836
- Publication type
Article
- DOI
10.1038/232110a0