RADIATION-SENSITIVE COMPOSITION CHANGING IN REFRACTIVE INDEX AND UTILIZATION THEREOF

摘要

A composition whose refractive index of a material is changed by a simple method, which can have a sufficiently large refractive index difference, and which provides a stable refractive index pattern and an optical material irrespective of their use conditions and a method for forming the refractive index pattern and the optical material. The above composition comprises (A) a decomposable compound, (B) a hydrolyzate of an alkoxide such as tetrabutoxytitanium, tetramethoxyzirconium, tetramethoxygermanium or tetramethoxysilane, or a halogen compound such as tetrachlorosilane and (C) a radiation sensitive decomposer and is sensitive to radiation.