Manufacture of 8.4 m segments for the GMT primary mirror

H. M. Martin; R. Ceragioli; B. Jannuzi; D. W. Kim; J. S. Kingsley; K Law; A. Loeff; R. D. Lutz; T. J. McMahon; S. Meyen; C. J. Oh; M. T. Tuell; S. N. Weinberger; S. C. West; R. Wortley

doi:10.1117/12.2590568

13 December 2020 Manufacture of 8.4 m segments for the GMT primary mirror

H. M. Martin, R. Ceragioli, B. Jannuzi, D. W. Kim, J. S. Kingsley, K Law, A. Loeff, R. D. Lutz, T. J. McMahon, S. Meyen, C. J. Oh, M. T. Tuell, S. N. Weinberger, S. C. West, R. Wortley

Author Affiliations +

Proceedings Volume 11451, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV; 114514F (2020) https://doi.org/10.1117/12.2590568
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

The Richard F. Caris Mirror Lab at the University of Arizona continues production of 8.4 m lightweight honeycomb segments for the primary mirror of the Giant Magellan Telescope. GMT will have a center segment surrounded by six off-axis segments, plus an additional off-axis segment to allow continuous operation as segments are removed for coating. The second off-axis segment was completed and accepted in 2019. We are currently polishing the optical surface of off-axis Segment 3. We have completed work on the rear surfaces of Segment 4, the center segment, and offaxis Segment 5. We are assembling the mold for off-axis Segment 6 with the spin-casting scheduled for March 2021.

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H. M. Martin, R. Ceragioli, B. Jannuzi, D. W. Kim, J. S. Kingsley, K Law, A. Loeff, R. D. Lutz, T. J. McMahon, S. Meyen, C. J. Oh, M. T. Tuell, S. N. Weinberger, S. C. West, and R. Wortley "Manufacture of 8.4 m segments for the GMT primary mirror", Proc. SPIE 11451, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV, 114514F (13 December 2020); https://doi.org/10.1117/12.2590568

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