18 July 2008 Removal of diamond-turning signatures on x-ray mandrels and metal optics by fluid-jet polishing
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Abstract
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.
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A. Beaucamp, R. Freeman, R. Morton, Karthik Ponudurai, D. D. Walker, "Removal of diamond-turning signatures on x-ray mandrels and metal optics by fluid-jet polishing", Proc. SPIE 7018, Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation, 701835 (18 July 2008); doi: 10.1117/12.787960; https://doi.org/10.1117/12.787960
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