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Proceedings Paper

Progress making the top end optical assembly (TEOA) for the 4-meter Advanced Technology Solar Telescope
Author(s): Blaise Canzian; J. Barentine; J. Arendt; S. Bader; G. Danyo; C. Heller
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Paper Abstract

L-3 Integrated Optical Systems (IOS) Division has been selected by the National Solar Observatory (NSO) to design and produce the Top End Optical Assembly (TEOA) for the 4-meter Advanced Technology Solar Telescope (ATST) to operate at Haleakalā, Maui. ATST will perform to a very high optical performance level in a difficult thermal environment. The TEOA, containing the 0.65-meter silicon carbide secondary mirror and support, mirror thermal management system, mirror positioning and fast tip-tilt system, field stop with thermally managed heat dump, thermally managed Lyot stop, safety interlock and control system, and support frame, operates in the "hot spot" at the prime focus of the ATST and so presents special challenges. In this paper, we describe progress in the L-3 technical approach to meeting these challenges, including silicon carbide off-axis mirror design, fabrication, and high accuracy figuring and polishing all within L-3; mirror support design; the design for stray light control; subsystems for opto-mechanical positioning and high accuracy absolute mirror orientation sensing; Lyot stop design; and thermal management of all design elements to remain close to ambient temperature despite the imposed solar irradiance load.

Paper Details

Date Published: 17 September 2012
PDF: 9 pages
Proc. SPIE 8444, Ground-based and Airborne Telescopes IV, 844409 (17 September 2012); doi: 10.1117/12.926342
Show Author Affiliations
Blaise Canzian, L-3 Integrated Optical Systems Brashear (United States)
J. Barentine, L-3 Integrated Optical Systems Tinsley (United States)
J. Arendt, L-3 Integrated Optical Systems Brashear (United States)
S. Bader, L-3 Integrated Optical Systems Brashear (United States)
G. Danyo, L-3 Integrated Optical Systems Brashear (United States)
C. Heller, L-3 Integrated Optical Systems Brashear (United States)


Published in SPIE Proceedings Vol. 8444:
Ground-based and Airborne Telescopes IV
Larry M. Stepp; Roberto Gilmozzi; Helen J. Hall, Editor(s)

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