| abstract |
A light diffuser, hologram or other light modifying structure is manufactured by exposing to UV light, a layer, on said substrate, of a photopolymerisable system which includes a silicone monomer, prepolymer, macromonomer or co-monomer, either the silicon monomer or another monomer in the system being ethylenically unsaturated and the system further including a photoinitiator so that the system is capable of undergoing free radical initiated polymerization, upon exposure to UV light to form a light diffusing sheet or hologram, for example. The method, when used to form an optical diffuser may include exposure of the system through an optical aperture mask or may simply comprise blanket exposure directly to UV radiation without the interposition of an optical mask. |