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Proceedings Paper

Ferrofluid-based deformable mirrors: a new approach to adaptive optics using liquid mirrors
Author(s): Phil R. Laird; R. Bergamasco; Vincent Berube; Ermanno F. Borra; Julie Gingras; Anna-Marie R. Ritcey; Myriam Rioux; Nathalie Robitaille; Simon Thibault; L. Vieira da Silva; Helene Yockell-Lelievre
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Paper Abstract

The trend towards ever larger telescopes and more advanced adaptive optics systems is driving the need for deformable mirrors with a large number of low cost actuators. Liquid mirrors have long been recognized a potential low cost alternative to conventional solid mirrors. By using a water or oil based ferrofluid we are able to benefit from a stronger magnetic response than is found in magnetic liquid metal amalgams and avoid the difficulty of passing a uniform current through a liquid. Depositing a thin silver colloid known as a metal liquid like film (MELLF) on the ferrofluid surface solves the problem of low reflectivity of pure ferrofluids. This combination provides a liquid optical surface that can be precisely shaped in a magnetic field. We present experimental results obtained with a prototype deformable liquid mirror based on this combination.

Paper Details

Date Published: 7 February 2003
PDF: 8 pages
Proc. SPIE 4839, Adaptive Optical System Technologies II, (7 February 2003); doi: 10.1117/12.459065
Show Author Affiliations
Phil R. Laird, Univ. Laval (Canada)
R. Bergamasco, Univ. Laval (Canada)
Vincent Berube, Univ. Laval (Canada)
Ermanno F. Borra, Univ. Laval (Canada)
Julie Gingras, Univ. Laval (Canada)
Anna-Marie R. Ritcey, Univ. Laval (Canada)
Myriam Rioux, Univ. Laval (Canada)
Nathalie Robitaille, Univ. Laval and INO (Canada)
Simon Thibault, INO (Canada)
L. Vieira da Silva, Univ. Laval (Canada)
Helene Yockell-Lelievre, Univ. Laval (Canada)

Published in SPIE Proceedings Vol. 4839:
Adaptive Optical System Technologies II
Peter L. Wizinowich; Domenico Bonaccini, Editor(s)

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