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Proceedings Paper

Carbon fibre composite deformable mirrors: developments at UCL
Author(s): Sarah Kendrew; Peter Doel; David Brooks; Andrew M. King; Chris Dorn; Richard M. Dwan; Chris Yates; Glyn Dando; Ian Richardson; Glynn Evans
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Paper Abstract

Adaptive optics performance is essential for achieving the demanding science goals set for the ground-based optical telescopes of the future - the so-called extremely large telescopes (ELTs). Research into novel technologies for lightweight and robust active and adaptive mirrors is crucial for ensuring this capability. Surface quality, form, and a high level of stability during operation are very important criteria for such mirrors. In 2004 we reported initial results from a project into the design and manufacture of a prototype carbon fibre reinforced polymer (CFRP) deformable mirror. This system has now been extensively characterised and tested, and results of dynamical testing and influence function measurements are discussed here. Manual grinding and polishing resulted in a residual form error of the order of 10 μm P-V and a surface roughness of approximately 5 nm rms. A good agreement was observed between the modeling data and experimental results.

Paper Details

Date Published: 28 June 2006
PDF: 11 pages
Proc. SPIE 6272, Advances in Adaptive Optics II, 62722Q (28 June 2006); doi: 10.1117/12.669808
Show Author Affiliations
Sarah Kendrew, Univ. College London (United Kingdom)
Mullard Space Science Lab. (United Kingdom)
Peter Doel, Univ. College London (United Kingdom)
David Brooks, Univ. College London (United Kingdom)
Andrew M. King, Univ. College London (United Kingdom)
Chris Dorn, QinetiQ (United Kingdom)
Richard M. Dwan, QinetiQ (United Kingdom)
Chris Yates, QinetiQ (United Kingdom)
Glyn Dando, QinetiQ (United Kingdom)
Ian Richardson, Cobham Composites (United Kingdom)
Glynn Evans, Cobham Composites (United Kingdom)

Published in SPIE Proceedings Vol. 6272:
Advances in Adaptive Optics II
Brent L. Ellerbroek; Domenico Bonaccini Calia, Editor(s)

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