Manufacture of primary mirror segments for the Giant Magellan Telescope
AuthorMartin, Hubert M.
Kim, Dae Wook
West, Steven C.
Oh, Chang Jin
AffiliationUniv Arizona, Steward Observ
Univ Arizona, Ctr Opt Sci
MetadataShow full item record
PublisherSPIE-INT SOC OPTICAL ENGINEERING
CitationH. M. Martin, R. Allen, V. Gasho, B. T. Jannuzi, D. W. Kim, J. S. Kingsley, K. Law, A. Loeff, R. D. Lutz, T. J. McMahon, C. J. Oh, M. T. Tuell, S. N. Weinberger, and S. C. West "Manufacture of primary mirror segments for the Giant Magellan Telescope", Proc. SPIE 10706, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III, 107060V (10 July 2018); doi: 10.1117/12.2312935; https://doi.org/10.1117/12.2312935
Rights© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE).
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at email@example.com.
AbstractThe Richard F. Carts Mirror Lab at the University of Arizona continues the 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 identical off-axis segments, plus an additional off-axis segment to allow continuous operation as segments are removed for coating. Production highlights of the last two years include the spin-casting of Segment 5, preliminary polishing of Segment 2, and completion of the rear surface processing for Segments 3 and 4. We completed a preliminary design of the significant modifications of the test systems required for Segment 4, the center segment. We finished an upgrade of the 8.4 m polishing machine; both the upgrade and experience gained with Segment 1 have contributed to much faster polishing convergence for Segment 2. Prior to polishing Segment 2, we verified the stability and accuracy of the measurement systems by re-measuring Segment 1, achieving good agreement among multiple independent tests as well as good agreement with the original acceptance tests of Segment 1.
VersionFinal published version
SponsorsGMTO Corporation; Arizona State University; Astronomy Australia Ltd; Australian National University; Carnegie Institution for Science, Harvard University; Korea Astronomy and Space Science Institute; Sao Paulo Research Foundation; Smithsonian Institution; University of Texas at Austin; Texas AM University; University of Arizona; University of Chicago