| 摘要 |
A disclosed optical pickup for performing at least recording, reproduction, or deletion of information on a first, second, third, and fourth optical recording media having different recording densities includes a first light source configured to emit first light having a first wavelength lambda1 corresponding to the first and second optical recording media; a second light source configured to emit second light having a second wavelength lambda2 corresponding to the third optical recording medium; a third light source configured to emit third light having a third wavelength lambda3 corresponding to the fourth optical recording medium; an objective lens configured to focus the first light, the second light, and the third light on corresponding recording surfaces of the first, second, third, and fourth optical recording media; and an aberration correcting unit between the objective lens and the first, second, and third light sources.
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