シリカ多孔質体、光学用途積層体及び組成物、並びに、シリカ多孔質体の製造方法

摘要

There is provided porous silica having a low refractive index and being stable when exposed to water. The porous silica is configured to have a refractive index of 1.3 or lower and to have a difference of the refractive index at a wavelength 550 nm between before the immersion into water and after the immersion into water for 24 hours of 0.15 or lower.