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Proceedings Paper

Multiplexing control of a multichannel piezoelectric deformable mirror
Author(s): Hong Song; Aleksey N. Simonov; Gleb Vdovin
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Paper Abstract

Addressing of massive arrays of piezoelectric actuators is usually achieved by using separate high-voltage output drivers, one per channel. This approach applied to high-order adaptive optics systems results in complex, expensive and vulnerable to handling abuse driver electronics, hardly scalable to 103-104 actuators. To reduce the number of identical electronic units and simplify the control, we propose sequential multiplexing of piezoelectric actuators. The relatively large capacitance inherent in mirror piezo-actuators allows for storage of charge (high voltage) on a disconnected actuator retaining its displacement, while other actuators are addressed. As a demonstrator a 12-channel piezoelectric deformable mirror driven by a single high-voltage amplifier has been characterized experimentally. The multiplexing of actuators was accomplished by miniature optical switches. Temporal stability of ~λ/100 was demonstrated at multiplexing frequency of 700 Hz with a full-range ~2 µm inter-actuator stroke. The developed approach can be scaled to higher-order deformable mirrors.

Paper Details

Date Published: 8 June 2006
PDF: 10 pages
Proc. SPIE 6018, 5th International Workshop on Adaptive Optics for Industry and Medicine, 60181F (8 June 2006); doi: 10.1117/12.669385
Show Author Affiliations
Hong Song, Fudan Univ. (China)
Aleksey N. Simonov, Delft Univ. of Technology (Netherlands)
Gleb Vdovin, Delft Univ. of Technology (Netherlands)

Published in SPIE Proceedings Vol. 6018:
5th International Workshop on Adaptive Optics for Industry and Medicine
Wenhan Jiang, Editor(s)

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