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

doi:10.1117/12.787960

18 July 2008 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

Proceedings Volume 7018, Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation; 701835 (2008) https://doi.org/10.1117/12.787960
Event: SPIE Astronomical Telescopes + Instrumentation, 2008, Marseille, France

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.

Citation Download Citation

A. Beaucamp, R. Freeman, R. Morton, Karthik Ponudurai, and 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); https://doi.org/10.1117/12.787960

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