| abstract |
(57) [Summary] [Object] A phase plate made of a norbornene-based resin having a polar group, more specifically, a phase plate having excellent viscosity or adhesiveness, small retardation and high uniformity is obtained. A phase plate comprising a monomer comprising at least one norbornene derivative or a polymer obtained by ring-opening polymerization of a copolymerizable monomer copolymerizable with this monomer, or a hydrogenated product thereof. |