Magneto-optical recording apparatus using the magnetic field modulation method
AssigneeSharp Kabushiki Kaisha
InventorsYoshiteru Murakami, Kenji Ohta, Akira Takahashi
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AssigneeSharp Kabushiki Kaisha
InventorsYoshiteru Murakami, Kenji Ohta, Akira Takahashi
Estimating the term…
A magneto-optical recording apparatus which records information through the processes of: first irradiating a light beam onto a magneto-optical recording medium having a recording film; and next applying an external magnetic field that is inverted in response to a recording signal onto the recording film while continuing the first process. In the above arrangement, the intensity of the light beam is dropped upon inversion of the external magnetic field so that information is not recorded. The intensity of the light beam is raised during non-inversion of the external magnetic field so that information is recorded. Further the magneto-optical recording apparatus is provided with a light intensity control device for varying the intensity of the light beam dependent of the lengths of recording bits so that the high-temperature area of the recording film is not widened. Since the width of the recording bits is uniformly maintained, the remaining of the recording bit after overwriting operation can be reduced; thus, the signal quality in reproduction can be enhanced.
A magneto-optical recording apparatus, which is provided with means for irradiating a light beam onto a magneto-optical recording medium having a recording film, made of a magnetic material, whereon information is recorded and means for applying an external magnetic field that is inverted in response to a recording signal onto the recording film that has been subjected to a temperature rise by the light beam, comprising:
A method for overwriting information on a recording film having previously recorded information in a magneto-optical recording apparatus, which apparatus is provided with means for irradiating a light beam onto a magneto-optical recording medium having the recording film and means for applying an external magnetic field that is inverted in response to a recording signal onto the recording film that has been subjected to a temperature rise by the light beam, comprising the steps of:
Dependencies are inferred from the claim text.