LBT adaptive secondary preliminary design

Details LBT adaptive secondary preliminary design LBT adaptive secondary preliminary design

Jul 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000spie.4007..508g&link_type=abstract

Proc. SPIE Vol. 4007, p. 508-515, Adaptive Optical Systems Technology, Peter L. Wizinowich; Ed.

Physics

Scientific paper

We report on the design of the two Gregorian adaptive secondary mirrors of the Large Binocular Telescope. Each adaptive secondary is a Zerodur shell having an external diameter of 911 mm and a thickness of about 1.5 mm. The deformable mirror is controlled by a pattern of 918 electromagnetic actuators. Its shape is referred to a stable ULE back plate by means of capacitive sensors co-located to the actuators pattern. The preliminary design of the system is addressed with particular attention to the reference plate optimization.

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