There is disclosed an optical pickup device including: a blue
semiconductor laser which emits a first laser light having a wavelength
of 450 nm or less to record on or reproduce from an extra-high density
optical disc; a red semiconductor laser which emits a second laser light
having a wavelength longer than that of the first laser light to record
on or reproduce from a DVD having a low recording density; an objective
lens; and an aberration correction element. The objective lens is
designed for the extra-high density optical disc, and has a numerical
aperture (NA) of 0.75 or more. The aberration correction element passes
the first laser light as such and thereafter allows the light to be
incident upon the objective lens, whereas the element limits an aperture
with respect to the second laser light and diffracts the second laser
light so as to correct an aberration with respect to the DVD and
thereafter allows the light to be incident upon the objective lens.