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Proceedings Paper

Investigating a Xinetics Inc. deformable mirror
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Paper Abstract

We present a study of the operating characteristics of the Xinetics Inc. deformable mirror and the driver electronics built by the Jet Propulsion Laboratory for Palomar Observatory’s adaptive optics project. This mirror, the first of its type built by Xinetics Inc., contains 349 PMN actuators which control a 2 millimeter thick mirror surface coated with protected silver. Measurements are separated into static and dynamic categories. The static tests determine the unpowered figure of the mirror surface, the influence of solitary actuators on the mirror surface and how the actuators move as a function of voltage applied, including considerations of hysteresis and creep. We have been able to flatten the mirror surface to an rms value of 19 nanometers. In the dynamic tests, we have resolved the motion of individual actuators whose voltages were changed at frequencies up to 1.5 kHz. The purpose of this study is to show that this deformable mirror has specific characteristics that must be determined in order to optimize its control.

Paper Details

Date Published: 17 October 1997
PDF: 11 pages
Proc. SPIE 3126, Adaptive Optics and Applications, (17 October 1997); doi: 10.1117/12.279064
Show Author Affiliations
Ben R. Oppenheimer, Palomar Observatory/California Institute of Technology (United States)
Dean L. Palmer, Jet Propulsion Lab. (United States)
Richard G. Dekany, Jet Propulsion Lab. (United States)
Anand Sivaramakrishnan, Palomar Observatory/California Institute of Technology (United States)
Mark A. Ealey, Xinetics, Inc. (United States)
Thomas R. Price, Xinetics, Inc. (United States)

Published in SPIE Proceedings Vol. 3126:
Adaptive Optics and Applications
Robert K. Tyson; Robert Q. Fugate, Editor(s)

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