Daikin Industries, Ltd.

Yoshito Ando

Takayuki Araki

Yoshito Tanaka

Yuzo Komatsu

There is provided a photofunctional laminated article being excellent in various photofunctionalities, particularly an intensity of light emission, light emitting efficiency and further fluorescence life and light amplifying property. The photofunctional laminated article comprises the transparent substrate (L0), the photofunctional layer (L1) comprising the fluorine-containing polymer (A) and the rare earth metal compound (B) and being formed on the substrate (L0) and the low refractive index layer (L2) formed on the photofunctional layer (L1), and when refractive indices of each layer are assumed to be n(L0), n(L1) and n(L2), the following equation: n(L0)&#x2267;n(L1)&#x3e;n(L2) is satisfied.

Photofunctional laminated article

There is provided an optical material obtained from an organic composition which is suitable for an optical material in optical communication and comprises a fluorine-containing polymer having functional group and a rare earth metal ion, in which the fluorine-containing polymer having functional group has at least one ketone structure in its side chain and a maximum absorption coefficient of not more than 1 cmin each wavelength range of from 1,290 to 1,320 nm, from 1,530 to 1,570 nm and from 600 to 900 nm and the rare earth metal ion is at least one selected from the group consisting of erbium (Er) ion, thulium (Tm) ion, praseodymium (Pr) ion, holmium (Ho) ion, neodymium (Nd) ion, europium (Eu) ion, dysprosium (Dy) ion, samarium (Sm) ion and cerium (Ce) ion.

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Settsu, Japan

Yoshito Ando