| abstract |
A process for the production of a film having a refractive index distribution, comprising producing a film by using an organic solvent solution containing as essential components a thermoplastic resin, a photopolymerizable monomer and a photopolymerization initiator, exposing the film to light and developing the film, n wherein a highly viscous solution containing as essential components a thermoplastic resin, a photopolymerizable monomer and a photopolymerization initiator and containing substantially no organic solvent is used in place of the organic solvent solution used for the production of the film. |