Manufacture of primary mirror segments for the Giant Magellan Telescope

H. 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; S. C. West

doi:10.1117/12.2312935

10 July 2018 Manufacture of primary mirror segments for the Giant Magellan Telescope

H. 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, S. C. West

Author Affiliations +

Proceedings Volume 10706, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III; 107060V (2018) https://doi.org/10.1117/12.2312935
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

Abstract

The Richard F. Caris 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.

Conference Presentation

Citation Download Citation

H. 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); https://doi.org/10.1117/12.2312935

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available