Koyo Hasegawa

Magnetooptical recording reproducing apparatus and method for determining the power of an irradiating light beam on the basis of a detected amplitude of a recording signal

Magnetic field generator in which an end face of a magnetic material member projects from man end face of magnetic field generating cores

Magneto-optical recording method using a magneto-optical recording medium having two or more magnetic layers to allow recording and reproduction to be effected simultaneously and magneto-optical recording medium used in the method

Method of recording information on a recording medium having at least two magnetic layers

Magnetic head driving device and magnetooptical recording apparatus

Information processing method and system

Magnetic field generating device

Image communication apparatus for communicating binary and multi-value color image data

Information reproducing apparatus for information recording medium having a plurality of information tracks

Magneto-optical recording apparatus capable of both magnetic modulation and light modulation recording