Piezoelectric positioning element

piezoelectric Control, in particular a piezoelectric motor, in form of a monolithic plate-shaped or cylindrical piezoelectric oscillator with piezoelectric Ceramic and having a first and a second type of main surfaces and these electrodes associated with groups comprising a housing, a driven element, at least one in or on the housing located on the driven element friction layer, a with an electrical excitation source associated with the friction layer in frictional contact stationary driving element, of the piezoelectric oscillator by the electrode groups to standing longitudinal acoustic waves in the direction of an oscillator resonant length and an oscillator resonant height This piezoelectric oscillator is excited, the oscillator resonance length equal or an integral multiple of the wavelength of the oscillation in the direction of their standing longitudinal acoustic wave, and the oscillator resonant height equal to a half wavelength acoustic of swinging in their direction stationary longitudinal Shaft, wherein both the oscillator resonance length, and the oscillator resonance height in the chosen way are that the Frequencies of the light propagating through the piezoelectric oscillator ...