The adaptive secondary concept has been introduced by Piero Salinari (Osservatorio Astrofisico di Arcetri - Florence) in 1993. The adaptive deformable mirror is currently one of the most attractive adaptive correction technologies for present and future telescopes.
From the beginning, Microgate has been one of the major contributors to the development of the "contactless" adaptive mirror concept, having conceived and realized a fully dedicated control electronics that is currently at its third generation.
A comprehensive list of publications on the adaptive secondary and related topics can be found here.
The video explains the advanced technology behind the sharp vision of LBT (Large Binocular Telescope)
This sample rendering of the E-ELT M4 brick explains better the concept of contactless
In the picture the reference body with the voice coil actuators
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