Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Patent
1985-05-17
1990-01-09
Stephan, Steven L.
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
369 44, G11B 724, G11B 726
Patent
active
048932981
ABSTRACT:
An optical record carrier body having a planar substrate with elongated generally parallel servo tracks thereon separated by lands extending there-between, the lands having a flat surface coplanar with the substrate surface and a recording layer thereon on which information can be recorded by a beam of radiation. Sector addresses are provided between successive segments of the lands, each sector address having optically detectable areas. The maximum transverse width of each servo track is at least 60% of the track period and at least twice the maximum transverse width of the sector address areas. Apparatus is disclosed for recording the servo tracks and sector addresses on a substrate, as well as apparatus for recording information on the successive segments of the lands between the sector addresses.
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Pasman Johannes H. T.
Van Hijningen Nicolaas C. J. A.
Eason Leroy
Nguyen Hoa T.
Stephan Steven L.
Tamoshunas Algy
U.S. Philips Corporation
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