MAGNETO-OPTICAL DISK APPARATUS CAPABLE OF ACCURATE REPRODUCTION OF SIGNAL BY REMOVING MAGNETIC INFLUENCE BY MAGNET INCLUDED IN OPTICAL HEAD AND METHOD OF DETECTING INTENSITY OF MAGNETIC FIELD APPLIED BY MAGNET

摘要

A magneto-optical disk apparatus includes a magnetic head in a position opposed to an objective lens included in an optical head with a magneto-optical record medium therebetween. The magneto-optical disk apparatus includes a magnet for cancelling a first magnetic field emitted toward the magnetic head from a magnet for focus servo-control or tracking servo-control of the objective lens. The magnet emits a second magnetic field in a direction toward the magnetic head. The second magnetic field is opposite in direction to the first magnetic field, and has the same intensity as the first magnetic field. Consequently, the signal can be accurately reproduced from the magneto-optical record medium while removing a magnetic influence from the magnet included in the optical head.