Patent ID: 8557941

Claim:
A process for replicating optical gratings which comprises the steps of: providing a substrate and a tool, the tool including one or more optical features; introducing a layer of a curable composition comprising: a diacrylate monomer mixture comprised of: a first diacrylate monomer of the formula: wherein n=2; X is a hydrogen or a methyl group; R includes at least one alicyclic ring structure; a second diacrylate monomer of a neopentyl glycol propoxylated diacrylate monomer; and the composition being substantially free of monofunctional acrylates onto the substrate or the tool, or between the substrate and the tool; exposing the curable composition to actinic radiation, the substrate or the tool allowing transmission of at least some of the radiation to form a partially cured composition; separating the substrate and the tool, the partially cured composition replicating the optical features of a tool surface and adhering to the substrate; and exposing the partially cured composition to further actinic radiation.