| abstract |
A composition which can be changed in refractive index by a simple method to give a refractive-index pattern and an optical material in each of which the resultant difference in refractive index is significantly large and is stable regardless of conditions of use thereafter; and a method of forming the pattern or optical material. The composition comprises (A) a decomposable compound, (B) a hydrolyzate of an alkoxide such as tetrabutoxytitanium, tetramethoxyzirconium, tetramethoxygermanium, or tetramethoxysilane or of a halide such as tetrachlorosilane, and (C) a radiation-sensitive decomposer. The composition is sensitive to a radiation. |