LIGHT REFRACTIVE INDEX MODULATION POLYMER, LIGHT REFRACTIVE INDEX MODULATION POLYMER COMPOSITION AND METHOD OF CONTROLLING REFRACTIVE INDEX

摘要

A method of controlling the refractive index of polymer optical molding, in which without the need of complex steps such as advance oxidation, the refractive index can be efficiently changed and in which when an optical device is manufactured, the transparency thereof is excellent; and, employed therein, a light refractive index modulation polymer and light refractive index modulation polymer composition. There is provided a method of controlling a refractive index characterized in that a light refractive index modulation polymer consisting of a polymer of monomers containing as an indispensable component an acrylic vinyl monomer of the formula: CH2=C(R<1>)C(=O)O-R<2>=CH2 (wherein R<1> is hydrogen atom or methyl, and R<2> is C1-C20 saturated or unsaturated hydrocarbon which may contain a heteroatom or halogen atom in its molecule) wherein a side chain vinyl capable of radical polymerization remains in the molecule thereof, or a composition comprising this polymer is exposed to radiation rays such as ultraviolet rays so that a density change is brought about through reaction of the vinyl to thereby realize a refractive index increase (Deltan) of 0.005 or greater by exposure.