Compound optical element and optical pickup apparatus

摘要

The present invention provides a compound optical element for an optical pickup apparatus, including: an aspherical lens and a resin layer arranged on at least one optical surface of the aspherical lens and having a phase structure, wherein the compound optical element satisfies a predetermined condition for optical path lengths of a light flux which passes the resin layer. The present invention also provides a compound optical element for an optical pickup apparatus including: a first lens part with a predefined Abbe number; a second lens part with a predefined Abbe number laminated on the first lens part and a phase structure formed on a boundary between the first lens part and air.