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Proceedings Paper

Computer-controlled cylindrical polishing process for development of grazing incidence optics for the hard x-ray region
Author(s): Gufran S. Khan; Mikhail Gubarev; Chet Speegle; Brian Ramsey
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Paper Abstract

The focusing performance of shell optics for the hard X-ray region strongly depends on their axial mid-spatialfrequency- range figure errors. This paper presents the development of a deterministic computer-controlled polishing process to minimize these axial figure errors on cylindrical shaped mandrels from which the mirror shells are replicated. A mathematical model has been developed to simulate the residual surface figure errors due to the polishing process parameters and the polishing tools used, along with their non-conformance to the mandrel. We present design considerations of a large-size polishing lap where the experimentally determined process variables have been used for optimizing the lap configuration and the machine operational parameters. Furthermore, the developed model is capable of generating a corrective polishing sequence for a known surface error profile. Practical polishing experiments have been performed to verify the model and to determine its ability to correct known axial figure errors through polishing machine control.

Paper Details

Date Published: 29 September 2010
PDF: 7 pages
Proc. SPIE 7802, Advances in X-Ray/EUV Optics and Components V, 78020H (29 September 2010); doi: 10.1117/12.862635
Show Author Affiliations
Gufran S. Khan, NASA Marshall Space Flight Ctr. (United States)
Mikhail Gubarev, NASA Marshall Space Flight Ctr. (United States)
Chet Speegle, NASA Marshall Space Flight Ctr. (United States)
Brian Ramsey, NASA Marshall Space Flight Ctr. (United States)

Published in SPIE Proceedings Vol. 7802:
Advances in X-Ray/EUV Optics and Components V
Shunji Goto; Ali M. Khounsary; Christian Morawe, Editor(s)

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