Magnetic recording media and servo systems using same

Details Magnetic recording media and servo systems using same Magnetic recording media and servo systems using same

G - Physics

11

B

352/31, 352/21.3

G11B 5/596 (2006.01) G11B 5/82 (2006.01) G11B 11/10 (2006.01)

Patent

CA 1280206

MAGNETIC RECORDING MEDIA AND SERVO SYSTEMS USING SAME Inventors: Vernon E. Ford Jeremy K. Jones John J. Mader William T. Plummer Abstract of Technical Disclosure Magnetic recording media, and magnetic recording systems using such media, are disclosed which incorporate a light-transmitting optical grating at least substantially coextensive with the magnetic recording area. A second light-transmitting optical grating is associated with the magnetic transducer or read/write head. A moire pattern is produced by light transmitted through both optical gratings, and changes in the moire pattern resulting from changes in the alignment of the optical gratings resulting from movement of the read/write head relative to the media are utilized to provide servo information to keep the magnetic transducer aligned with the magnetic track. Higher magnetic recording capacities may be obtained using such media and systems, since none of the magnetic recording area is used for servo information.

544731

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