Measuring and testing – Vibration – By mechanical waves
Reexamination Certificate
2006-10-24
2006-10-24
Williams, Hezron (Department: 2856)
Measuring and testing
Vibration
By mechanical waves
C073S606000
Reexamination Certificate
active
07124635
ABSTRACT:
By measuring, for an ultra-low-expansion glass material, the frequency dependence of acoustic velocities and attenuation coefficients of bulk waves (longitudinal waves and shear waves), and the density, its fundamental acoustic properties are revealed, and a standard specimen for use in system calibration is prepared. By an absolute calibration method using the standard specimen, absolute values for both the LSAW and LSSCW velocities are obtained. Moreover, there are obtained relationships for the acoustic properties and the coefficient of thermal expansion to evaluate the coefficient of thermal expansion from the acoustic properties. In case there is a distribution of characteristics due to periodic striae, an accurate acoustic property distribution in the substrate can be ascertained and an evaluation performed, by selecting for the substrate a cutting angle with respect to the striae plane.
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Arakawa Mototaka
Kushibiki Jun-ichi
Ohashi Yuji
Shinozaki Yukihiro
Chuo Precision Industrial Co., Ltd.
Gallagher & Lathrop
Lathrop, Esq. David N.
Miller Rose M.
Tohoku University
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