Narrow ion-beam figuring: a new tool to address extreme slopes on small surfaces located near telescope pupils

Ulrich Mueller; Jeff Stone; Bridget G. Peters; Jay Daniel; Thomas P. Greene; Ruslan Belikov; Olivier Guyon

doi:10.1117/12.857962

19 July 2010 Narrow ion-beam figuring: a new tool to address extreme slopes on small surfaces located near telescope pupils

Ulrich Mueller, Jeff Stone, Bridget G. Peters, Jay Daniel, Thomas P. Greene, Ruslan Belikov, Olivier Guyon

Author Affiliations +

Proceedings Volume 7739, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation; 77390B (2010) https://doi.org/10.1117/12.857962
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

Abstract

Advanced shapes can now be produced for the corrective optics placed near a reimaged pupil, or even a deformable mirror surface. These surfaces can be improved and even apodization added to improve contrast. In this paper, we describe a special form of Narrow Ion Beam Figuring (NIBF) developed at L-3 Tinsley. In contrast to existing Ion Beam Figuring (IBF) machining schemes, the FWHM beam width is controlled in a much narrower band while still providing high beam currents.

Citation Download Citation

Ulrich Mueller, Jeff Stone, Bridget G. Peters, Jay Daniel, Thomas P. Greene, Ruslan Belikov, and Olivier Guyon "Narrow ion-beam figuring: a new tool to address extreme slopes on small surfaces located near telescope pupils", Proc. SPIE 7739, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation, 77390B (19 July 2010); https://doi.org/10.1117/12.857962

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