| abstract |
(57) [Summary] [Purpose] To obtain a photochromic material that can withstand long-term exposure to ultraviolet light. [Structure] A cross-linked polymer obtained by curing an active energy ray-curable photopolymerizable composition comprising a liquid crystal material, an ultraviolet absorber, a specific photopolymerization initiator and a polymerizable compound having a (meth) acryloyloxy group. , A liquid crystal composite composed of a transparent solid substance, and the liquid crystal composite may have an electrode layer, and at least one of them is sandwiched between two substrates so that the two substrates face each other. The arranged liquid crystal optical device and the mixture of the photopolymerizable composition and the liquid crystal material are sandwiched between two substrates, at least one of which may have an electrode layer, and the mixture is irradiated with active energy rays. And then curing the liquid crystal optical device. |