A new two-dimensional fast steering mirror based on piezoelectric actuators

Abstract

A new two-dimensional fast steering mirror (FSM) based on piezoelectric actuators is designed, which has high scanning angle and resonance frequency. The FSM is driven by three piezoelectric actuators. Each piezoelectric actuator and its displacement amplification mechanism compose of the Amplified Piezoelectric Actuator (APA).The three APAs have a staggered arrangement to acquire compact structure and close driven point. The mechanism structure and principle of the FSM are introduced. The algorithm of decoupling and hysteresis compensation is proposed. In order to test the performance of the FSM, a performance test system is built up. The test result shows that the FSM has a two-dimensional scanning angle of 2 ,two axis' nonlinearities of 1.7% and 1.1% after compensation and main resonance frequency of 640Hz and 1290Hz.

Fast and reliable control of steering mirrors with application to free-space communication

“…Even when the transmitter and the receiver are fixed, the laser beam that contains the modulated signals is in need for a precise alignment and correction to ensure a good demodulation of the transmitted signal at the receiver side. Referring to the existing literature, a great deal of interest has been devoted to the control of fast steering mirrors that have been used as key tools for laser beam alignment and correction, see e.g., [1], [2], [3], [4], [5]. Laser-tracking measurement systems based on a vision-guiding device has been proposed in [6].…”