OPTICAL ELEMENT AND PRODUCTION METHOD OF THE SAME

摘要

Disclosed is an optical element for use in an optical apparatus having a light source which emits a light flux with a wavelength lambda (350 nm@lambda@450 nm), the optical element containing: a molded portion formed by molding a resin; and one or a plurality of anti-reflection layers formed on the molded portion, wherein at least one of the anti-reflection layers is made of SixOy; and an elemental ratio r (r=y/x) designating an ratio of O to Si in the molecule of SixOy satisfies a requirement represented by Formula (1): 1.40@r@1.80.