Patent ID: 7344077

Claim:
An optical pickup control apparatus provided in an optical disc apparatus that allows an optical pickup to irradiate an optical disc with a laser beam to record/reproduce data onto or from the optical disc, comprising: spherical aberration correction means for correcting a spherical aberration of the laser beam incident on the optical disc based on a spherical aberration correction value; focus bias adjustment means for adjusting a focus servo in the optical pickup for the optical disc based on a focus bias value; evaluation value generation means for generating an evaluation value from a signal based on a reflection light obtained by the optical pickup; function approximation means for approximating a two-variable function having the spherical aberration correction value and focus bias value as variables to the evaluation value based on spherical aberration correction values, focus bias values and evaluation values on a plurality of respective measurement points determined by combinations of the spherical aberration correction values and focus bias values; and optimal value calculation means for calculating, as an optimal value, the spherical aberration correction value and focus bias value on which the evaluation value becomes optimal based on the two-variable function obtained by the approximation of the function approximation means.