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US 5,458,827 AGranted
Method of polishing and figuring diamond and other superhard material surfaces
AssigneeRockwell International Corporation
InventorSandor Holly
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Abstract
A method of shaping and polishing the surface of a polycrystalline diamond including the steps of diffusion smoothing the diamond surface with hot reactive metals, shaping the smoothed diamond surface by laser ablation using a pulsed laser beam, and ion-beam assisted polishing the ablated diamond surface to optical smoothness. The polished diamond can be used for high quality optics.
Claims1
A method of shaping and polishing a chemically vapor deposited polycrystalline diamond surface comprising,
- diffusion smoothing the diamond surface to remove sharp edges of large facets of the polycrystalline diamond and to provide a first order smoothing to the diamond surface;
- spatially and in-depth controlled laser ablating the diffusion smoothed diamond surface to provide an accurate shape of the diamond surface wherein said ablating includes a simultaneous laser interferometric measuring of the diamond surface for controlling said ablation;
- and
- ion-beam assisted polishing the ablated diamond surface to provide a third order smoothing of the diamond surface.
1 more element
Dependencies are inferred from the claim text.