Hysteresis correction of a piezoelectrically actuated segmented mirror

Mark P. J. L. Chang; Andrew Zadrozny; David F. Buscher; Colin N. Dunlop; David J. Robinson

doi:10.1117/12.321646

11 September 1998 Hysteresis correction of a piezoelectrically actuated segmented mirror

Mark P. J. L. Chang, Andrew Zadrozny, David F. Buscher, Colin N. Dunlop, David J. Robinson

Proceedings Volume 3353, Adaptive Optical System Technologies; (1998) https://doi.org/10.1117/12.321646
Event: Astronomical Telescopes and Instrumentation, 1998, Kona, HI, United States

Abstract

ELECTRA is the University of Durham's high order AO system designed for the William Herschel Telescope. The correcting element is a segmented deformable mirror, where each segment is driven by a cylindrical piezoelectric actuator such that it can be moved in tip, tilt and piston. In order to cophase all the segments of the mirror it is necessary to calibrate and linearize the response of these actuators. To this end, we have installed strain gauge transducers along the electrodes of each actuator to provide information on their instantaneous extensions and calibrated their responses.

Citation Download Citation

Mark P. J. L. Chang, Andrew Zadrozny, David F. Buscher, Colin N. Dunlop, and David J. Robinson "Hysteresis correction of a piezoelectrically actuated segmented mirror", Proc. SPIE 3353, Adaptive Optical System Technologies, (11 September 1998); https://doi.org/10.1117/12.321646

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