Resonator made of nonpiezoelectric material with high quality coefficient
AssigneeEtat Francais as represented by the Deleque General pour l'Armement
InventorsEugene J. Dieulesaint, Daniel R. Royer
Life of this patent
Estimating the term…
Abstract
The resonator (10) includes a monocrystal (11) of a nonpiezoelectric matel with low attenuation of elastic bulk waves, such as corundum, means of supporting the monocrystal fastened to the monocrystal at points corresponding to the vibration nodes, thermal means (40) for directly causing a proper excitation of the monocrystal (11) and optical means (50) for detecting the periodic motion of the resonator without contact. Application in particular in oscillator construction.
Claims14
A resonator of nonpiezoelectric material with a high quality coefficient comprising:
- a monocrystal of nonpiezoelectric material with a low attenuation of bulk elastic waves, means for supporting the monocrystal attached to the monocrystal at points corresponding to vibration nodes, thermal means for directly causing an excitation of the monocrystal at the natural frequency of the monocrystal and optical means for detecting periodic motions of the resonator without mechanical contact with the resonator.
An oscillator comprising:
- a resonator of nonpiezoelectric material having a high quality coefficient comprising a monocrystal of nonpiezoelectric material with a low attenuation of bulk elastic waves;
- means for supporting the monocrystal attached to the monocrystal at points corresponding to vibration nodes;
- thermal means, responsive to an electrical modulation voltage, for causing an excitation of the monocrystal at the natural frequency of the monocrystal;
- and
- optical means for detecting periodic vibration of the resonator without mechanical contact with the resonator, and for producing an output signal according to the periodic vibration;
- wherein the electrical modulation voltage applied to the thermal means is supplied by an amplifier receiving the output signal from the optical means.
Dependencies are inferred from the claim text.