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Deterministic Polishing of Replicating Grazing-Incidence MandrelsIn 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.

Document ID
20190032051
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Davis, Jacqueline (NASA Marshall Space Flight Center Huntsville, AL, United States)
Champey, Patrick (NASA Marshall Space Flight Center Huntsville, AL, United States)
Kolodziejczak, Jeff (NASA Marshall Space Flight Center Huntsville, AL, United States)
Griffith, Charles (NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
October 11, 2019
Publication Date
August 11, 2019
Subject Category
Astrophysics
Report/Patent Number
MSFC-E-DAA-TN73695
Meeting Information
Meeting: SPIE Optics & Photonics
Location: San Diego, CA
Country: United States
Start Date: August 13, 2019
End Date: August 15, 2019
Sponsors: International Society for Optical Engineering
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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