DEVICE AND METHOD FOR CONTROLLING OPTICAL PICKUP, AND OPTICAL DISK DEVICE

摘要

PROBLEM TO BE SOLVED: To properly and quickly adjust the spherical aberration and the focus bias of an optical pickup.

SOLUTION: An evaluation value is measured at a plurality of measuring points formed by combining spherical aberration correction and focus bias values, and two variable functions in which the spherical aberration correction and focus bias values are variables are approximated to each other for the evaluation value. Proper values of the spherical aberration correction and focus bias values in which the evaluation value becomes best are calculated based on the two approximated variable functions. Thus, the spherical aberration and the focus bias of the optical pickup are properly and quickly adjusted.

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