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Proceedings Paper

MEMS DM development at Iris AO, Inc.
Author(s): Michael A. Helmbrecht; Min He; Carl J. Kempf; Marc Besse
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Paper Abstract

Iris AO is actively developing piston-tip-tilt (PTT) segmented MEMS deformable mirrors (DM) and adaptive optics (AO) controllers for these DMs. This paper discusses ongoing research at Iris AO that has advanced the state-of-the-art of these devices and systems over the past year. Improvements made to open-loop operation and mirror fabrication enables mirrors to open-loop flatten to 4 nm rms. Additional testing of an anti snap-in technology was conducted and demonstrates that the technology can withstand 100 million snap-in events without failure. Deformable mirrors with dielectric coatings are shown that are capable of handling 630 W/cm2 of incident laser power. Over a localized region on the segment, the dielectric coatings can withstand 100kW/cm2 incident laser power for 30 minutes. Results from the first-ever batch of PTT489 DMs that were shipped to pilot customers are reported. Optimizations made to the open-loop PTT controller are shown to have latencies of 157.5 μs and synchronous array update rates of nearly 6.5 kHz. Finally, plans for the design and fabrication of the next-generation PTT939 DM are presented.

Paper Details

Date Published: 14 February 2011
PDF: 6 pages
Proc. SPIE 7931, MEMS Adaptive Optics V, 793108 (14 February 2011); doi: 10.1117/12.876186
Show Author Affiliations
Michael A. Helmbrecht, Iris AO, Inc. (United States)
Min He, Iris AO, Inc. (United States)
Carl J. Kempf, Iris AO, Inc. (United States)
Marc Besse, Iris AO, Inc. (United States)

Published in SPIE Proceedings Vol. 7931:
MEMS Adaptive Optics V
Scot S. Olivier; Thomas G. Bifano; Joel A. Kubby, Editor(s)

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