Method for adjusting magnetic and optical heads in magneto-optical recording device
AssigneeFujitsu Limited
InventorsYasukiyo Kunimatsu, Kazuhito Yokoyama
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Abstract
A magneto-optical memory device includes a first unit projecting a light beam onto a desired position on a recording medium, and a second unit applying a magnetic field to a position onto which the light beam is projected. The second unit applies, to the recording medium, a predetermined magnetic field within a magnetic field intensity range wherein a rate of change of a reproduced signal amplitude at the time of reproduction with respect to a magnetic field intensity becomes large. The relative positions of the second unit and the first unit are adjusted in accordance with a reproduced signal amplitude thus obtained.
Claims17
A magneto-optical device comprising:
- an optical directing unit directing a light beam onto a position on a recording medium;
- a magnetic field generating unit applying a magnetic field to the recording medium at the position onto which the light beam is directed, the magnetic field having a magnetic field intensity within a predetermined range below a saturation magnetic field intensity of the recording medium;
- and
- an adjustment unit adjusting the magnetic field intensity to obtain a desired rate of change of a reproduced signal amplitude with respect to the magnetic field intensity.
A magneto-optical device comprising:
- an optical directing unit directing a light beam onto a position on a recording medium;
- and
- magnetic field generating unit applying a magnetic field to the recording medium at the position onto which the light beam is directed,
- the magnetic field having a magnetic field intensity that lies within a predetermined range below a saturation magnetic field intensity of the recording medium and that exhibits a desired rate of change with respect to the amplitude of the reproduced signal.
A method of reproducing a signal stored on a magneto-optical recording medium, the reproduced signal having an amplitude, the medium having a saturation magnetic field intensity, the method comprising the steps of:
- projecting a light beam generated by a first unit onto a position on the recording medium;
- applying a magnetic field generated by a second unit to the recording medium at the position onto which the light beam is projected, the magnetic field having a magnetic field intensity within a predetermined range below the saturation magnetic field intensity;
- and
- adjusting the magnetic field intensity to obtain a desired rate of change of the reproduced signal amplitude with respect to the magnetic field intensity.
Dependencies are inferred from the claim text.