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AssigneeSony Corporation
InventorsHiroshi Nakayama, Atsushi Takeuchi, Junichi Nemoto, Hiroyuki Miura
Estimating the term…
When carrying out magnetization, annealing, and initialization of a recording film by applying a laser beam to the recording film while rotating an optical recording medium 10 by a motor 11, light of a strong visible-light lamp 15 is projected as parallel light to a reflecting mirror 14 via a lens 16 so as to apply light reflected by the reflecting mirror 14 to an area wider than a spot of the laser beam on the medium 10 for heating. At that time, a control unit 18 controls an intensity of the strong visible-light lamp 15 to raise a temperature of the medium 10 to a temperature of 80° C. or higher and a softening point of a substrate or lower, for example.
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A preheating bulk erase device for an optical recording medium, the device carrying out initialization of a recording film by applying a laser beam to the recording film while rotating a phase-change type medium, characterized in that it is provided with heating means for heating said medium when applying said laser beam.
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A preheating bulk erase device for an optical recording medium, characterized in that it carries out initialization of a recording film by applying a laser beam to the recording film while rotating a phase-change type medium and performing a heating process for heating said medium upon application of said laser beam.
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An optical recording medium, characterized in that it is manufactured by carrying out initialization of a recording film by applying a laser beam to the recording film while rotating a phase-change type medium and heating said medium upon application of said laser beam.
Dependencies are inferred from the claim text.