| abstract |
[PROBLEMS] To change a refractive index of a material by a simple method, and to obtain a sufficiently large difference in the changed refractive index, and furthermore, to obtain a stable refractive index pattern and optical irrespective of subsequent use conditions. To provide a radiation-sensitive refractive index changing composition capable of providing a material. SOLUTION: The radiation-sensitive refractive index contains (A) a polymerizable compound, (B) a non-polymerizable compound having a lower refractive index than the polymer of the polymerizable compound (A), and (C) a radiation-sensitive polymerization initiator. Variable composition. |