Preheating bulk erasing device for magneto-optical disk

Details Preheating bulk erasing device for magneto-optical disk Preheating bulk erasing device for magneto-optical disk

2007-03-20

2007-03-20

Dinh, Tan (Department: 2627)

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

Reexamination Certificate

active

10381157

ABSTRACT:
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 medium10by a motor11,light of a strong visible-light lamp15is projected as parallel light to a reflecting mirror14via a lens16so as to apply light reflected by the reflecting mirror14to an area wider than a spot of the laser beam on the medium10for heating. At that time, a control unit18controls an intensity of the strong visible-light lamp15to raise a temperature of the medium10to a temperature of 80° C. or higher and a softening point of a substrate or lower, for example.

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