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LSST secondary mirror assembly
Author(s): William J. Gressler; Douglas R. Neill; John Bagnasco; Paul J. Lotz; Dave Mills; Mike Warner; Oliver Wiecha; Gregory N. Bogan; James M. Ellis; Dale C. Zajac; Steven A. Szklany; Ronald T. Broccolo; Malcolm N. O'Sullivan; Frank A. Carbone; Cormic K. Merle
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Paper Abstract

The Large Synoptic Survey Telescope (LSST) large field of view is achieved through a three-lens camera system and a three-mirror optical system comprised of a unique 8.4-meter diameter monolithic primary/tertiary mirror (M1M3) and a 3.4-meter diameter secondary mirror (M2)1. The M2 is a 100mm thick meniscus convex asphere. The M2 Assembly includes a welded steel cell and a support system comprised of 72 axial and 6 tangential electromechanical actuators to control the mirror figure. The M2 Assembly (including optical polishing and integrated optical testing) is being fabricated by Harris Corporation in Rochester, NY. The summary status of this system and results are presented.

Paper Details

Date Published: 6 July 2018
PDF: 26 pages
Proc. SPIE 10700, Ground-based and Airborne Telescopes VII, 1070019 (6 July 2018); doi: 10.1117/12.2311316
Show Author Affiliations
William J. Gressler, Large Synoptic Survey Telescope (United States)
Douglas R. Neill, Large Synoptic Survey Telescope (United States)
John Bagnasco, Large Synoptic Survey Telescope (United States)
Paul J. Lotz, Large Synoptic Survey Telescope (United States)
Dave Mills, Large Synoptic Survey Telescope (United States)
Mike Warner, Large Synoptic Survey Telescope (United States)
Oliver Wiecha, Large Synoptic Survey Telescope (United States)
Gregory N. Bogan, Harris Corp. (United States)
James M. Ellis, Harris Corp. (United States)
Dale C. Zajac, Harris Corp. (United States)
Steven A. Szklany, Harris Corp. (United States)
Ronald T. Broccolo, Harris Corp. (United States)
Malcolm N. O'Sullivan, Harris Corp. (United States)
Frank A. Carbone, Harris Corp. (United States)
Cormic K. Merle, Harris Corp. (United States)


Published in SPIE Proceedings Vol. 10700:
Ground-based and Airborne Telescopes VII
Heather K. Marshall; Jason Spyromilio; Roberto Gilmozzi, Editor(s)

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