Fujitsu Corporation

Nobuyuki Nankumo

Shigenori Yanagi

Takehiko Numata

A magneto-optical recording medium device of the present invention optimizes a magnetic field forming the front mask and a magnetic field forming the rear mask by use of a single bias magnetic field generator, by shifting the peak position of the bias magnetic field in the magneto-optical recording medium device so as to deviate from the center of the laser beam spot in a tangential direction of the magneto-optical recording medium, enabling extended recording and reproduction margins.

Magneto-optical recording medium device

An objective lens driver and an optical memory device with the respective polarities of magnetic circuits used for the focusing and tracking operations are set such that a repulsive force works in a direction opposing the gravitational force. Respective differing polarities of a pair of magnetic circuits used for focusing face each other, and respective differing polarities of a pair of magnetic circuits used for tracking also face each other.

Growing community of inventors

Kawasaki, Japan

Nobuyuki Nankumo