Abstract: An optical disc apparatus comprises a control circuit for performing a first calibration process before the initiation of a write operation and performing a second calibration process during the write operation; the first calibration process includes the steps of: performing focus calibration for the objective lens at a plurality of radial positions on the optical disc based on the output of a photodetector; calculating the vertical disc deviation at the radial positions on the optical disc based on the results of the focus calibration; and based on information about the calculated vertical disc deviation, setting radial positions on the optical disc at which to perform focus calibration during the write operation; wherein the second calibration process includes the steps of: calculating the focus drive amounts, or focus movement ranges, at the set radial positions on the optical disc based on the results of the focus calibration in the first calibration process; and performing focus calibration at the set ra