Shigeyoshi Goka

Mode Shape Measurement of Piezoelectric Resonators Using Image Processing Technique.

An image processing technique for measuring the mode shapes of piezoelectric resonators is described. Laser speckle interference, a periodic resonator excitation and charge coupled device (CCD) image captures are effectively combined in this method. The experimental results for three kinds of AT-cut quartz resonators demonstrate the applicability of the proposed method.

Visualization of Mode Patterns of Piezoelectric Resonators Using Correlation Filter

The application of a two-dimensional correlation filter to the mode shape visualization of piezoelectric devices is described. The filter extracts the vibrational patterns from two laser-speckle images of the driven and resting phases. The experimental results demonstrate clearly the feasibility of the proposed technique.

Theoretical and experimental investigation of the light shift in Ramsey coherent population trapping

The ac Stark shift (or light shift) of the 6

Nonscanning measurements for determining in-plane mode shapes in piezoelectric devices with polished surfaces

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Phase noise measurements in dual-mode SC-cut crystal oscillators

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Effect of Stepped Bi-Mesa Structures on Spurious Vibrations of AT-Cut Quartz Plates

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Method based on laser speckle interferometry for measuring absolute in-plane vibrational distribution of piezoelectric resonators

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Frequency-Temperature Behavior of Stepped Bi-Mesa-Shaped AT-Cut Quartz Resonators

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Analysis of 3-D vibrations of rectangular AT-cut quartz plates with a bi-mesa structure

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Influence of Viscosity Loss on Coupled Vibrations of Ultrahigh Frequency AT-Cut Quartz Plates

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