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Proceedings Paper

Hysteresis correction of a piezoelectrically actuated segmented mirror
Author(s): Mark P. J. L. Chang; Andrew Zadrozny; David F. Buscher; Colin N. Dunlop; David J. Robinson
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Paper 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.

Paper Details

Date Published: 11 September 1998
PDF: 8 pages
Proc. SPIE 3353, Adaptive Optical System Technologies, (11 September 1998); doi: 10.1117/12.321646
Show Author Affiliations
Mark P. J. L. Chang, Univ. of Durham (United States)
Andrew Zadrozny, Univ. of Durham (United Kingdom)
David F. Buscher, Univ. of Durham (United Kingdom)
Colin N. Dunlop, Univ. of Durham (United Kingdom)
David J. Robinson, Univ. of Durham (United Kingdom)


Published in SPIE Proceedings Vol. 3353:
Adaptive Optical System Technologies
Domenico Bonaccini; Robert K. Tyson, Editor(s)

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