| 摘要 |
Disclosed is a technique that comprises selective removal of material from a surface of a polycrystalline diamond (polyD) film (e.g., 11) such that a non-planar surface results. Exemplarily the technique is used to form polyD optical elements, e.g., convex or concave lenses, or Fresnel lenses, including arrays of such lenses. The technique comprises maintaining on appropriately shaped hot template body in intimate contact with a polyD surface for a time (e.g., in the range 1 - 1000 hours) sufficient to result in formation of the desired feature in the polyD surface. The template body comprises a rare earth metal (La and Ce are preferred), Mn and/or Fe, and the temperature is below the melting temperature of the template body. Removal of "spent" template material by, e.g., chemical etching and finishing of the polyD feature, e.g., by laser ablation and/or polishing, are contemplated. <IMAGE> |
