Acoustic microscope for analyzing an object in depth having asph

Details Acoustic microscope for analyzing an object in depth having asph Acoustic microscope for analyzing an object in depth having asph

1985-09-12

1987-02-10

Kreitman, Stephen A.

Measuring and testing

Vibration

By mechanical waves

73642, G01N 2904

Patent

active

046415300

ABSTRACT:
An acoustic microscope for analyzing an object in depth has aspherical lenses. It comprises two identical bars arranged in the extension of one another and provided on their facing ends with a cavity, said cavities defining a pseudo-hyperbolic focussing lens and objective lens, whereby the foci of said two lenses coincide and the lenses are linked by a mercury or gallium drop in which can be immersed the object to be analyzed. The bars are provided at their other ends with a piezoelectric transducer. These transducers are able to produce ultrasonics focussed within the object by the focussing lens and are able to detect the ultrasonics reflected or transmitted by the object via the objective lens. These are also means for analyzing ultrasonics reflected or transmitted by the object and means for displacing the object in the focal plane of the two lenses.

REFERENCES:
patent: 4012950 (1977-03-01), Kompfner et al.
Applied Physics Letters, vol. 24, No. 4, Feb. 15, 1974, pp. 163-165, American Institute of Physics, New York, R. A. Lemons et al., "Acoustic Microscope Scanning Version".
Toute l'Electronique, No. 492, Mar. 1984, pp. 56-58, Paris, J. Attal et al., "Progres de la Microscopie Acoustique dans l'Investigation des Solides".
Applied Optics, vol. 35, No. 5, Sep. 1979, pp. 385-387, American Institute of Physics, New York, V. B. Jipson, "Acoustic Microscopy of Interior Planes", p. 386, column 1, line 14, p. 386, column 2, line 2.

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