Hardening components, hardened film, and camera device

Abstract

A curable composition is provided that can form a curable film with high refractive index and good heat resistance. The curable composition contains titanium dioxide particles and a polymeric compound. The polymeric compound is a compound having one or two ethylene unsaturated bonds. The molecular weight or weight average molecular weight of the polymeric compound is 3000 or less. Based on the total amount of solids in the curable composition, the total content of titanium dioxide particles and the polymeric compound is 85% by mass or more.