Curable composition and cured product from same

A curable composition for production of an optical component by molding using silicone molds, the curable composition comprising:

• curable compounds;
• and
• a cationic initiator,
• the curable compounds comprising
• (A) a cycloaliphatic epoxy compound;
• (B) an oxetane compound;
• and
• (C) a glycidyl ether epoxy compound,
• the cycloaliphatic epoxy compound (A) being a compound represented by Formula (a):
• wherein R1 to R18 are each, identically or differently, selected from, hydrogen, halogen, a hydrocarbon group optionally containing oxygen or halogen, and optionally substituted alkoxy;
• and X is selected from a single bond and a linkage group,
• wherein the linkage group is selected from divalent hydrocarbon groups, alkenylenes with part or all of carbon-carbon double bond(s) being epoxidized, carbonyl, ether bond, ester bond, amido, and groups each including two or more of these groups linked to each other,
• wherein the cycloaliphatic epoxy compound (A) is present in a content of 10 weight percent or more of the totality of all the curable compounds contained in the curable composition,
• wherein the glycidyl ether epoxy compound (C) comprises an aromatic glycidyl ether epoxy compound, and an alicyclic glycidyl ether epoxy compound,
• wherein the cycloaliphatic epoxy compound (A), the oxetane compound (B), and the glycidyl ether epoxy compound (C) are present in combination in a total content of 90 weight percent or more of the totality of all the curable compounds contained in the curable composition, and
• wherein of the totality of all the curable compounds contained in the curable composition, 10 to 50 weight percent are a curable compound or compounds having a molecular weight of 400 or more.