Dynamic information storage or retrieval – Storage or retrieval by simultaneous application of diverse... – Magnetic field and light beam
Reexamination Certificate
2007-05-29
2007-05-29
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
10235429
ABSTRACT:
A head arrangement for reading a magneto-optical recording medium (10) having a storage layer and a read-out layer, includes an improved field generating device for generating a magnetic field used for copying a written mark from said storage layer to said read-out layer upon laser heating, the field generating device being arranged to generate a predetermined field gradient and/or a predetermined local maximum in a field component perpendicular to the surface of the recording medium (10). The width of the spatial overlap can thus be reduced such that an improved resolution and/or power margin is obtained.
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Dinh Tan
Koninklijke Philips Electronics N. V.
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