| 摘要 |
An optical information recording/reproduction apparatus capable of eliminating a waste of learning time for spherical aberration learning and rationalizing the spherical aberration-correcting operation is provided. Specifically, the optical information recording/reproduction apparatus includes: a discrimination circuit for discriminating the kind of an optical disk, that is, whether a recording layer is a single-layer, or whether double-layers or an optical disk is a disk corresponding to red-laser or a disk corresponding to blue-laser; a correction device for correcting the aberration due to a change in thicknesses of the transparent substrate of an optical disk by changing intervals between a plurality of lenses; a learning circuit for searching a correction amount while changing intervals between the plurality of lenses; and a circuit for changing initial positions of intervals between the plurality of lenses at start of learning in accordance with a discrimination result by the discrimination circuit.
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