By Topic

The measurement of absolute strain (or stress) in the small quartz crystal resonators by a single slit method [observation of vibratory character of a small NS-GT cut resonator]

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

1 Author(s)
S. Yamagata ; Hokkaido Univ. of Educ., Japan

From the necessity of downsizing devices, the size of quartz crystal resonators has currently been made smaller. If we make a quartz crystal resonator's size smaller, small external effects will change frequencies or quality factors of the resonator. And those changes make it more difficult to accurately measure stress distributions. In the angle slit vibration diffraction method, by making a single slit (or a pin point hole) and letting a laser beam into the slit, a diffraction pattern is formed which changes slightly with vibration frequency. The diffraction pattern is dynamic but the change itself is very small, therefore we need to detect the change of diffractions using optical fibers. The detected optical signals are converted to an electric signal by a photomultiplier. The patterns of diffractions tell us the changes of the angle slit width and the vibration shift of the resonator. From those results, we can get the absolute values of strain (or stress) and the absolute vibration shift value of the resonator. We experimentally measure the internal strain and the vibration shift value of a small NS-GT cut resonator by this method. Knowing the absolute values, such as strains, and vibration shifts of a small quartz crystal, is very useful in controlling the thickness of vacuum evaporation electrodes and improving the mounting of resonators.

Published in:

Frequency Control Symposium and PDA Exhibition, 2002. IEEE International

Date of Conference: