TMT DMs final design and advanced prototyping results at Cilas

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DOIResolve DOI: http://doi.org/10.1117/12.925313
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TypeArticle
Proceedings titleAdaptive Optics Systems III
Series titleProceedings of SPIE; Volume 8447
ConferenceAdaptive Optics Systems III, July 1-6, 2012, Amsterdam, Netherlands
ISSN0277-786X
ISBN9780819491480
Article number844706
SubjectAdaptive optics systems; Construction phase; Deformable mirrors; Low temperatures; Operational temperature; Piezomaterials; Piezostack actuators; SAM; Thermal behaviors; Thirty Meter Telescope; Actuators; Adaptive optics; Finite element method; Laser pulses; Metal drawing; Specifications
AbstractIn 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 76x76); (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. © 2012 SPIE.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); National Science Infrastructure
Peer reviewedYes
NPARC number21270292
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Record identifier3e7ea4f6-e0b0-49ac-a307-0fc7c07cad61
Record created2014-01-21
Record modified2016-05-09
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