Dynamic information storage or retrieval – Systems having plural physically distinct independent tracks... – Having layered storage medium
Reexamination Certificate
2011-04-26
2011-04-26
Chow, Lixi (Department: 2627)
Dynamic information storage or retrieval
Systems having plural physically distinct independent tracks...
Having layered storage medium
C369S272100, C369S283000
Reexamination Certificate
active
07933185
ABSTRACT:
An optical read/write apparatus causes a read/write light beam from illuminating means to strike only one side of an optical storage medium including stacked data storage layers each of which is readable/writeable separately from the other layers. In this case, the optical read/write apparatus operates so that data is read/written from/into a second data storage layer after fully recording a recordable area of a first data storage layer. Thus, light can be shone with uniform intensity across the substantially entire recordable area of the second data storage layer without using a complex read/write system even under such conditions that the transmittance to light of the first data storage layer in the recordable area may vary depending on whether any data is recorded in the recordable area.
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K. Kurokawa et al.; “A 16.8 GB Double-Decker Phase Change Disc”; SPIE; vol. 3864; Jul. 1999; pp. 197-199.
Hirokane Junji
Iwata Noboru
Chow Lixi
Conlin David G.
Edwards Angell Palmer & & Dodge LLP
Sharp Kabushiki Kaisha
Tucker David A.
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