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Proceedings Paper

The aluminizing system for the 8.4 meter diameter LBT primary mirrors
Author(s): Bruce Atwood; Daniel Pappalardo; Thomas O'Brien; John M. Hill; Jerry Mason; Ralph Belville; David Steinbrecher; David Brewer; Ed Teiga; Barry Sabol; James Howard; L. Miglietta
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Paper Abstract

The recently commissioned system for aluminizing the 8.408 meter diameter Large Binocular Telescope mirrors has a variety of unusual features. Among them are aluminizing the mirror in the telescope, the mirror is horizon pointing when aluminized, boron nitride crucibles are used for the sources, only 28 sources are used, the sources are powered with 280 Volts at 20 kHz, high vacuum is produced with a LN2 cooled charcoal cryo-panel, an inflatable edge seal is used to isolate the rough vacuum behind the mirror from the high vacuum space, and a burst disk is mounted in the center hole to protect the mirror from overpressure. We present a description of these features. Results from aluminizing both primary mirrors are presented.

Paper Details

Date Published: 6 July 2006
PDF: 12 pages
Proc. SPIE 6273, Optomechanical Technologies for Astronomy, 62730T (6 July 2006); doi: 10.1117/12.672998
Show Author Affiliations
Bruce Atwood, The Ohio State Univ. (United States)
Daniel Pappalardo, The Ohio State Univ. (United States)
Thomas O'Brien, The Ohio State Univ. (United States)
John M. Hill, LBT Observatory, Univ. of Arizona (United States)
Jerry Mason, The Ohio State Univ. (United States)
Ralph Belville, The Ohio State Univ. (United States)
David Steinbrecher, The Ohio State Univ. (United States)
David Brewer, The Ohio State Univ. (United States)
Ed Teiga, The Ohio State Univ. (United States)
Barry Sabol, New Mexico Institute of Mining and Technology (United States)
James Howard, LBT Observatory, Univ. of Arizona (United States)
L. Miglietta, Osservatorio Astrofisico d'Arcetri (Italy)

Published in SPIE Proceedings Vol. 6273:
Optomechanical Technologies for Astronomy
Eli Atad-Ettedgui; Joseph Antebi; Dietrich Lemke, Editor(s)

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