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A locking clamp that enables high thermal and vibrational stability for kinematic optical mounts
Author(s): Maggie Kautz; Laird M. Close; Jared R. Males
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Paper Abstract

One of the main pursuits of the MagAO-X project is imaging planets around nearby stars with the direct detection method utilizing an extreme AO system and a coronagraph and a large telescope. The MagAO-X astronomical coronagraph will be implemented on the 6.5 meter Clay Magellan Telescope in Chile. The 22 mirrors in the system require a high level of mirror stability. Our goal is less than 1 microradian drift in tilt per mirror per one degree Celsius change in temperature. There are no commercial 2inch kinematic optical mounts that are truly “zero-drift” from 0-20C. Our solution to this problem was to develop a locking clamp to keep our optics stable and fulfill our specifications. After performing temperature variation and thermal shock testing, we conclude that this novel locking clamp significantly increases the thermal stability of stainless steel mounts by ~10x but still allows accurate microradian positioning of a mirror. A provisional patent (#62/632,544) has been obtained for this mount.

Paper Details

Date Published: 18 July 2018
PDF: 7 pages
Proc. SPIE 10703, Adaptive Optics Systems VI, 107032Q (18 July 2018); doi: 10.1117/12.2314245
Show Author Affiliations
Maggie Kautz, College of Optical Sciences, The Univ. of Arizona (United States)
Laird M. Close, Steward Observatory, The Univ. of Arizona (United States)
Jared R. Males, Steward Observatory, The Univ. of Arizona (United States)

Published in SPIE Proceedings Vol. 10703:
Adaptive Optics Systems VI
Laird M. Close; Laura Schreiber; Dirk Schmidt, Editor(s)

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