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Magneto optical overwriting methods using a single optical head designed for a two-beam overwrite
Magneto optical overwriting methods using a single optical head designed for a two-beam overwrite
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机译:使用为双光束覆盖设计的单个光学头的磁光覆盖方法
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摘要
A method for overwriting information in a magneto-optical memory medium which includes a simultaneous writing and erasing step of continuously irradiating a written information-carrying area of the recording layer of the memory medium with two different pulses from a single laser beam head in accordance with information to be written, regardless of the presence or absence of written information. A variation includes irradiating the written information-carrying area with an erasing pulse from a laser beam head, regardless of the presence or absence of written information, and then selectively irradiating the information-erased area with a writing pulse from another laser beam head in accordance with information to be written. According to these methods, it becomes possible to carry out a simple and high-speed overwriting with an increased and stabilized bit positioning accuracy.
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