Aberration correcting unit, optical pickup device, information reproducing apparatus, and aberration correcting program

摘要

A control portion of aberration correcting unit includes: a potential calculating block that determines a potential to be applied to each of the divided electrodes of the first transparent electrode and the second transparent electrode; a change quantity calculating block that determines a potential change quantity that is a difference between the determined potential and a potential that is already applied with respect to each of the divided electrodes of the first transparent electrode and the second transparent electrode, and a potential changing block changes the potentials to be applied to the divided electrodes of the first transparent electrode and the second transparent electrode sequentially to the potentials determined by the potential calculating block based on the potential change quantity.