Patent ID: 8076400

Claim:
A material composition comprising: 5 weight % to 50 weight % of niobium (V) oxide fine particles (A); 49 weight % to 94 weight % of an organic compound (B) comprising at least one of allyl carbazole and N-(β-methacryloyloxyethyl)carbazole having one or more polymerizable functional groups in one molecule thereof; and 0.05 weight % to 5 weight % of a polymerization initiator (C), wherein the material composition is cured to form a cured product that satisfies the following relationships: 10≦ν d≦ 40 and 0.02≦Δθ gF≦ 0.12 where νd is the Abbe number of the cured product and ΔθgF is the anomalous dispersion of the cured product as determined for the F and g spectral lines.