| 摘要 |
<p>An optical pickup for an optical recording medium (1) having a plurality of recording faces (1a, 1b), wherein a light source, having a plurality of laser light emitting sections (a, b) that are provided for respective recording faces (1a, 1b) and adjusted and set in the mutual positions in the direction of optical axis such that spherical aberration does not occur due to the optical characteristics of laser light being applied to the corresponding recording face (1a, 1b) through a common objective lens (8), is provided. Since recording or reproducing operation can be carried out using the light emitting section (a, b) corresponding to the recording face (1a, 1b), a good recording or reproducing operation can be realized using a small and low-cost optical system as compared with that employing a wave aberration correction element, e.g. a liquid crystal element.</p> |
