Optical pickup apparatus

An optical pickup apparatus comprising:

• a laser diode configured to emit laser light having a first wavelength;
• an objective lens configured to focus the laser light having the first wavelength emitted from the laser diode to each of a signal recording layer of a first optical disc and a signal recording layer of a second optical disc, the first optical disc being an optical disc for which the laser light having the first wavelength is specified as laser light for reproducing a signal, the second optical disc being an optical disc for which laser light having a second wavelength different from the first wavelength is specified as laser light for reproducing a signal;
• and
• a spherical aberration correction element disposed in an optical path between the laser diode and the objective lens, the spherical aberration correction element being configured to correct each spherical aberration of the first optical disc and the second optical disc to reproduce a signal recorded in each of the signal recording layer of the first optical disc and the signal recording layer of the second optical disc.