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Proceedings Paper

LSST secondary mirror system final design
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Paper Abstract

The Large Synoptic Survey Telescope (LSST) has a 10 degrees square field of view which is achieved through a 3 mirror optical system comprised of an 8.4 meter primary, 3.5 meter secondary (M2) and a 5 meter tertiary mirror. The M2 is a 100mm thick meniscus convex asphere. The mirror surface is actively controlled by 72 axial electromechanical actuators (axial actuators). Transverse support is provided by 6 active tangential electromechanical actuators (tangent links). The final design has been completed by Harris Corporation. They are also providing the fabrication, integration and testing of the mirror cell assembly, as well as the figuring of the mirror. The final optical surface will be produced by ion figuring. All the actuators will experience 1 year of simulated life testing to ensure that they can withstand the rigorous demands produced by the LSST survey mission. Harris Corporation is providing optical surface metrology to demonstrate both the quality of the optical surface and the correctablility produced by the axial actuators.

Paper Details

Date Published: 27 July 2016
PDF: 12 pages
Proc. SPIE 9906, Ground-based and Airborne Telescopes VI, 990667 (27 July 2016); doi: 10.1117/12.2234021
Show Author Affiliations
Douglas R. Neill, LSST (United States)
Gregory Bogan, Harris Corp. (United States)
Dale Zajac, Harris Corp. (United States)
Constanza Araujo , LSST (United States)
William J. Gressler, LSST (United States)
Joe DeVries, LSST (United States)
Edward A. Hileman, LSST (United States)
Paul J. Lotz, LSST (United States)
Dave Mills, LSST (United States)
Sandrine Thomas, LSST (United States)
Thomas A. Sebring, Xoptx LLC (United States)
Jacques Sebag, LSST (United States)
Mike Warner, LSST (United States)
Oliver Wiecha, LSST (United States)


Published in SPIE Proceedings Vol. 9906:
Ground-based and Airborne Telescopes VI
Helen J. Hall; Roberto Gilmozzi; Heather K. Marshall, Editor(s)

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