Application of piezoceramic actuators in adaptive interferometry

Abstract

The features of application of piezoceramic actuators in adaptive interferometry are considered in this work. Methods of power supply of actuators from a sinusoidal voltage source with preservation of positive polarity of a control signal by means of schemes on the basis of operational amplifiers are developed. The possibility of modulating not only for amplitude and frequency but also the phase of mechanical oscillations of the surface of the actuator by using a phase-rotating circuit (FRC) is provided, the method of parameters calculating of FRC elements is also proposed. A two-channel control circuit for piezoceramic actuators has been implemented.