Dynamic information storage or retrieval – Systems having plural physically distinct independent tracks... – Having layered storage medium
Reexamination Certificate
2007-11-06
2007-11-06
Wellington, Andrea (Department: 2627)
Dynamic information storage or retrieval
Systems having plural physically distinct independent tracks...
Having layered storage medium
C369S112230
Reexamination Certificate
active
10348121
ABSTRACT:
An optical information storage system has a multi-recording-layer record carrier and a scanner device for the carrier. The scanner produces a radiation beam which is compensated for spherical aberration for a single height of the scanning spot with the stack of layers. The height of the stack is determined by the maximum spherical aberration permissible for the system. The number of layers in the stack is determined by the minimum distance between layers, which depends on the crosstalk in the error signals due to currently unscanned layers.
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Coops Peter
Heemskerk Jacobus P. J.
Holtslag Antonius H. M.
Visser Derk
Agustin Peter Vincent
Belk Michael E.
Koninklijke Philips Electronics , N.V.
Wellington Andrea
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