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TMT DMs final design and advanced prototyping results at Cilas

Sinquin, Jean-Christophe and Bastard, Arnaud and Boyer, Corinne and Cornette, Sébastien and Cousty, Raphaël and Ellerbroek, Brent and Gilbert, Xavier and Gourdet, Benoit and Grasser, Régis and Groeninck, Denis and Guillemard, Claude and Herriot, Glen and Iannacone, Albert and Jeulin, Antoine and Moreau, Aurélein and Pagès, Hubert and Wang, Lianqi (2012) TMT DMs final design and advanced prototyping results at Cilas. In: Adaptive Optics Systems III. Proceedings of SPIE. No.8447. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 844706. ISBN 9780819491480.

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In order to prepare for the construction phase of the two Deformable Mirrors (DMs), which will be used in the Thirty Meter Telescope (TMT) first light Adaptive Optics (AO) system, Cilas has advanced the design of these two large size piezo DMs and has manufactured and tested a scaled demonstration prototype. The work done allowed significant reduction of the risks related to the demanding specifications of the TMT DMs; the main issues were: (i) Large pupil (up to 370 mm) and high order (up to 74x74); (ii) Relatively low operational temperature (DMs working at -30°C); (iii) New piezo material. It is important to develop such a prototype to take into account these three specifications all together (dimension, low temperature and new piezo material). The new prototype is a 6x60 actuators and has the same characteristics as the future TMT DMs. In this paper, we give the conclusions of the work through the presentation of the following items: (i) Design and finite element analysis of the two DMs and prototype; (ii) Test results obtained with the prototype with validation of the finite element analysis and compliance with the TMT AO specifications; (iii) Special focus on thermal behavior, actuator reliability and shape at rest stability.

Item Type:Book Section
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Additional Information:© 2012 Society of Photo-Optical Instrumentation Engineers (SPIE).
Group:Thirty Meter Telescope
Subject Keywords:adaptive optics, deformable mirror, stack array mirror, piezostack actuator, SAM
Series Name:Proceedings of SPIE
Issue or Number:8447
Record Number:CaltechAUTHORS:20180619-161902312
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Official Citation:Jean-Christophe Sinquin, Arnaud Bastard, Corinne Boyer, Sébastien Cornette, Raphaël Cousty, Brent Ellerbroek, Xavier Gilbert, Benoit Gourdet, Régis Grasser, Denis Groeninck, Claude Guillemard, Glen Herriot, Albert Iannacone, Antoine Jeulin, Aurélien Moreau, Hubert Pagès, Lianqi Wang, "TMT DMs final design and advanced prototyping results at Cilas", Proc. SPIE 8447, Adaptive Optics Systems III, 844706 (13 September 2012); doi: 10.1117/12.925313;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:87246
Deposited By: George Porter
Deposited On:20 Jun 2018 14:48
Last Modified:03 Oct 2019 19:53

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