Magneto-optical recording apparatus with pulse driven light beam and variable delay of magnetic field reversals based on recording medium characteristics

A magneto-optical recording apparatus for recording information onto a magneto-optical recording medium, comprising:

• optical head means movable relative to said recording medium and including light generating means for directing a light beam to said recording medium for forming a light beam spot on said recording medium which scans the recoding medium and thereby causes irradiating of said recording medium where said light beam spot scans the recording medium, and detection means for detecting light reflected from said recording medium at said light beam spot;
• clock signal generating means responsive to said detection means for generating a predetermined reference clock signal supplied to said light generating means which responds to said reference clock signal for causing said light generating means to intermittently produce said light beam in a pulse driving mode thereof so that said light beam spot is then intermittently produced and results in irradiated areas disposed one after the other on said recording medium at a timing determined by said reference clock signal;
• magnetic field generating means for generating a magnetic field having a magnetic polarity and acting on said recording medium at a location on said recording medium which is adjacent to said light beam spot;
• magnetic field modulating means receiving said reference clock signal and information data to be recorded for providing a record signal which undergoes reversal of amplitude polarity in timed relation to said reference clock signal and which represents said information data;
• delay means through which said record signal is supplied to said magnetic field generating means for causing reversal of said magnetic polarity of said magnetic field in accordance with each reversal of amplitude polarity of said record signal, and which has a variable delay time;
• and
• control means for providing a control signal corresponding to at least one of magnetic and temperature characteristics of said recording medium and which is applied to said delay means for varying said delay time and thereby controlling timing of said reversal of the magnetic polarity of the magnetic field relative to said reference clock signal.