Optical element and optical pickup device having the same

摘要

An optical element of this invention includes a lens portion serving as an optical function surface and a flange portion whose outer periphery is formed rectangularly at the periphery of the lens portion. The optical element is molded by injecting a resin from a resin injection port located at a position corresponding to a corner of the flange portion in a mold. There is also provided an optical element wherein a cutting portion of a resin injected from a resin injection port of a mold which molds the optical element is formed at one corner of the flange portion. There is further provided an optical pickup device using the optical axis as a collimator lens.