Deterministic polishing of replicating grazing-incidence mandrels

Jacqueline Davis; Patrick Champey; Jeffrey Kolodziejczak; Charles Griffith

doi:10.1117/12.2532198

30 September 2019 Deterministic polishing of replicating grazing-incidence mandrels

Jacqueline Davis, Patrick Champey, Jeffrey Kolodziejczak, Charles Griffith

Proceedings Volume 11119, Optics for EUV, X-Ray, and Gamma-Ray Astronomy IX; 111190U (2019) https://doi.org/10.1117/12.2532198
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States

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.

Conference Presentation

Citation Download Citation

Jacqueline Davis, Patrick Champey, Jeffrey Kolodziejczak, and Charles Griffith "Deterministic polishing of replicating grazing-incidence mandrels", Proc. SPIE 11119, Optics for EUV, X-Ray, and Gamma-Ray Astronomy IX, 111190U (30 September 2019); https://doi.org/10.1117/12.2532198

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