Patent ID: 7923116

Claim:
An optic-purpose resin obtained by curing a mixture of at least a first resin precursor having d-line refractive index n d <1.50 and 0.003<(F-line refractive index n F -C-line refractive index n C ) in an uncured state, and a second resin precursor having d-line refractive index n d <1.62 and 0.010<(F-line refractive index n F -C-line refractive index n C ) in an uncured state; said first resin precursor not containing any of a benzene ring, a sulfur atom, a chlorine atom, a bromine atom and an iodine atom, having at least one of any of an acrylic group, a methacrylic group and a vinyl group; and said second resin precursor not containing any of a sulfur atom and a halogen atom, and having at least one of any of an acrylic group, a methacrylic group and a vinyl group.