Dynamic information storage or retrieval – Binary pulse train information signal – Binary signal processing for controlling recording light...
Reexamination Certificate
2008-04-15
2008-04-15
Young, Wayne (Department: 2627)
Dynamic information storage or retrieval
Binary pulse train information signal
Binary signal processing for controlling recording light...
Reexamination Certificate
active
10347801
ABSTRACT:
In a method of recording information by varying the front- and rear-edge positions of a mark by integer multiples of a specific interval, the recording density is increased without narrowing the intervals of edge position variation and without being influenced by the detection dynamic range. A data cell is divided at specific intervals Δ, and the front- and rear-edge positions of the mark are disposed at any desired positions at specific intervals Δ. Thus the mark length and the number of positions the mark can take can be increased, so that the recording density can be increased with the same margin as that of the prior art.
REFERENCES:
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patent: 5809004 (1998-09-01), Kobayashi et al.
patent: 6545965 (2003-04-01), Hayashi
patent: 2002-157734 (2002-05-01), None
Japan Journal of Applied Physics, vol. 35, 1996, pp. 437-442.
Chow Lixi
Hitachi , Ltd.
Mattingly, Stanger Malur & Brundidge PC
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