Vibration-type motor controller and optical apparatus

A vibration-type motor controller which controls a driving speed of a vibration-type motor relatively moving a vibrating body in which a vibration is excited by an electromechanical energy conversion element to which a first frequency signal and a second frequency signal having a phase difference are applied, and a contacting body which contacts the vibrating body, the vibration-type motor controller comprising:

• a speed controller configured to switch a first speed control and a second speed control, the first speed control alternately switching a frequency control which changes frequencies of the first and second frequency signals while fixing the phase difference between the first frequency signal and the second frequency signal and a phase difference control which changes the phase difference while fixing the frequencies of the first and second frequency signals so that at least one of a plurality of frequency controls or a plurality of phase difference controls are included to increase and decrease the driving speed of the vibration-type motor, and the second speed control performing the frequency control without performing the phase difference control to increase and decrease the driving speed of the vibration-type motor.