PLASTIC LENS, LENS UNIT AND PRODUCTION DIE FOR PLASTIC LENS

摘要

PROBLEM TO BE SOLVED: To provide a plastic lens which is reduced in possibility of having welds and shape errors and has high quality, a lens unit and a production die for plastic lenses.SOLUTION: A plastic lens 1 includes a lens effective part 2, a lens frame part 3 and a circular ring part 4 which is arranged throughout the circumference of the lens effective part 2 between the lens effective part 2 and the lens frame part 3 and formed so as to be thinner than the lens frame part 32 by molding the lens effective part 2 and the lens frame part 3 integrally. The lens frame part 3 is formed by injecting a molding resin material into the lens frame part 3 from four gates.