TMT: stressed mirror polishing fixture study

Stephen F. Sporer

doi:10.1117/12.693114

26 June 2006 TMT: stressed mirror polishing fixture study

Stephen F. Sporer

Proceedings Volume 6267, Ground-based and Airborne Telescopes; 62672R (2006) https://doi.org/10.1117/12.693114
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

Abstract

This paper examines the use of Stressed Mirror Polishing for rapid and low cost fabrication of the large number of mirror segments required for the TMT primary mirror. Prior experience fabricating Keck mirror segments is used as a starting point. Specific refinements are made to processes and tooling for faster and more economical fabrication of segments ready for Ion Beam Figuring. Analytical calculations, finite element analyses, design trades, and stressing fixture conceptual designs are presented. Feasibility of Stressed Mirror Polishing is demonstrated and recommendations for further work are given.

Citation Download Citation

Stephen F. Sporer "TMT: stressed mirror polishing fixture study", Proc. SPIE 6267, Ground-based and Airborne Telescopes, 62672R (26 June 2006); https://doi.org/10.1117/12.693114

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