Removal of diamond-turning signatures on x-ray mandrels and metal optics by fluid-jet polishing

A. Beaucamp, R. Freeman, R. Morton, Karthik Ponudurai, D. D. Walker

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

33 Citations (Scopus)


This paper describes a major advance in the post-treatment of diamond-turned surfaces to remove repetitive micro-structure; a result which could have a major beneficial impact on fabrication of Walter-type X-ray mandrels, and metal mirrors. Diamond-turning is highly deterministic and versatile in producing axially-symmetric forms, and through fast-tool servos, non-axially symmetric, free-form and micro-structured surfaces. However, the fine turning marks left in the metal surface limit performance. In this paper, we describe how fluid-jet polishing under CNC control can be used to eliminate these structures, without significantly degrading the surface roughness or form produced by the prior turning operation.

Original languageEnglish
Title of host publicationAdvanced Optical and Mechanical Technologies in Telescopes and Instrumentation
Publication statusPublished - 21 Nov 2008
Externally publishedYes
EventSPIE Astronomical Telescopes and Instrumentation - Marseille, France
Duration: 23 Jun 200828 Jun 2008


ConferenceSPIE Astronomical Telescopes and Instrumentation


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