Patent ID: 8513857
Filing Date: 2013-08-20
Classification: G02B,G03B,H02N

Abstract:
1. A vibrational wave motor comprising: an electromechanical conversion element excited by a driving signal; a vibrating element joined with the electromechanical conversion element, and having a drive surface where a progressive vibrational wave is generated by the excitation; a relative motion member having a sliding surface pressure-contacting the drive surface of the vibrating element, and which is driven by the progressive vibrational wave; and a driving device for providing the driving signal to the electromechanical conversion element, wherein: the driving device provides the driving signal to the electromechanical conversion element, the driving signal generating the progressive vibrational wave satisfying a-value/λ≦0.00025 in the drive surface, where a vibration amplitude generated in the drive surface of the vibrating element is defined as the a-value, and a wavelength of the progressive wave generated in the drive surface of the vibrating element is defined as λ.