Measuring and testing – Vibration – Sensing apparatus
Patent
1985-02-04
1986-09-30
Birmiel, Howard A.
Measuring and testing
Vibration
Sensing apparatus
73584, 350358, 356432, G01N 2900
Patent
active
046141162
ABSTRACT:
A phase-sensitive ultrasonic modulation method for the detection of strain-sensitive spectral features involves the use of an ultrasonic field with well-defined wavefronts and a light beam of spot size less than the ultrasonic wavelength and of linewidth less than that of the spectral feature. When the light wavelength coincides with the wavelength of the spectral feature, the ultrasonic wave shifts, splits, or broadens the absorption lineshapes of the various centers contributing to the spectral feature thereby changing the amplitude or phase of the light beam or emitted fluorescence in synchrony with the ultrasonic field.
REFERENCES:
patent: 4101976 (1978-07-01), Castro et al.
patent: 4297035 (1981-10-01), Bjorklund
Huston et al.; Journal of the Optical Society of America B, vol. 1, No. 3, Jun. 1984, pp. 349-353.
Bjorklund et al; U.S. patent application Ser. No. 06/511,593, filed Jul. 7, 1983.
Romagnoli et al.; Journal of the Optical Society of America B, vol. 1, pp. 341-348 (1984).
Clare et al.; J. Phys. C: Solid St. Phys. 13 (1980) 865-78.
Lengfellner et al.; Appl. Phys. Lett. 43 (5) (1983) pp. 437-439.
Huston Alan L.
Moerner William E.
Birmiel Howard A.
International Business Machines - Corporation
Kieninger Joseph E.
Walsh Joseph G.
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