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Proceedings Paper

Deterministic polishing of replicating grazing-incidence mandrels
Author(s): Jacqueline Davis; Patrick Champey; Jeffrey Kolodziejczak; Charles Griffith
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Paper Abstract

In an effort to manufacture high-angular-resolution, grazing-incidence, x-ray optics, Marshall Space Flight Center (MSFC) is taking measures to improve its electroformed replicated optics. A key development is the use of computer-numerical control (CNC) polishing to deterministically improve the surface of electroless nickel mandrels used to replicate grazing-incidence optics. Metrology, control software and polishing parameters must function together seamlessly to reach the specifications required to replicate sub-arcsecond optics. Each change in polishing parameters effects the wear pattern of the polishing head. Using Richardson-Lucy deconvolution, the controller software fits the wear pattern to metrology data to calculate the changing feedrates across the mandrel. Here we present an overview of our process, and early results showing the effectiveness of deterministic polishing for replicated optics.

Paper Details

Date Published: 30 September 2019
PDF: 10 pages
Proc. SPIE 11119, Optics for EUV, X-Ray, and Gamma-Ray Astronomy IX, 111190U (30 September 2019); doi: 10.1117/12.2532198
Show Author Affiliations
Jacqueline Davis, NASA Marshall Space Flight Ctr. (United States)
Patrick Champey, NASA Marshall Space Flight Ctr. (United States)
Jeffrey Kolodziejczak, NASA Marshall Space Flight Ctr. (United States)
Charles Griffith, NASA Marshall Space Flight Ctr. (United States)

Published in SPIE Proceedings Vol. 11119:
Optics for EUV, X-Ray, and Gamma-Ray Astronomy IX
Stephen L. O'Dell; Giovanni Pareschi, Editor(s)

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