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.
|Title of host publication||Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation|
|Publication status||Published - 21 Nov 2008|
|Event||SPIE Astronomical Telescopes and Instrumentation - Marseille, France|
Duration: 23 Jun 2008 → 28 Jun 2008
|Conference||SPIE Astronomical Telescopes and Instrumentation|
|Period||23/06/08 → 28/06/08|