Disclosed herein is an optical pickup device and method of adjusting the
same. The optical pickup device and method of adjusting the same of the
present invention can correct aberrations due to variation of thickness of
an optical disc and dispersion of the emission wavelength by a
semiconductor laser, which are generated in manufacturing processes of the
optical disc and the optical pickup device, correct aberrations generated
in recording/reproducing of the optical disc, due to variation of the
emission wavelength and secular changes in the environment of the
semiconductor laser, simplify and miniaturize the construction of the
optical pickup device, and easily reduce manufacturing cost thereof. The
optical pickup device of the present invention has a semiconductor laser
(1) and a photo diode (13) for narrowing light emitted from the
semiconductor laser (1) to a predetermined diameter and for detecting
light reflected and returned from an optical disc (14). Further, the
optical pickup device has a relay lens (21) and a liquid crystal
aberration correcting device (23) disposed between the semiconductor laser
(1) and an object lens (25) for correcting wavefront aberrations and/or
remaining wavefront aberrations.
