Multi-layered optical disk and method of detecting a track
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsIsao Satoh, Yoshihisa Fukushima, Yuji Takagi, Yasushi Azumatani, Hiroshi Hamasaka
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Abstract
A multi-layered optical disk comprising a plurality of recording layers accumulated in the thickness direction wherein a light beam is focused on one of tracks of one of the layers thereby to record and reproduce data, the optical disk being characterized in that recording layers each have an identification section storing an address of the recording layer which the identification section belongs to.
Claims13
A multi-layered optical disk comprising a plurality of recording layers accumulated in the thickness direction wherein a light beam is focused on one of tracks of one of the layers thereby to record and reproduce data, the optical disk being characterized in that recording layers each have an identification section storing an address of the recording layer which the identification section belongs to.
A multi-layered optical disk comprising a plurality of recording layers each having a plurality of tracks, wherein the layers are accumulated in the way that the tracks are aligned in the thickness direction;
- the optical disk being characterized in that at least one of recording layers has a first identification section storing an address of the tracks which are aligned in the thickness direction and one of which has the first identification section;
- and that the recording layers each have a second identification section storing an address of the recording layer which the second identification section belongs to.
A multi-layered optical disk comprising a plurality of recording layers each having a plurality of tracks, wherein the layers are accumulated in the way that the tracks are aligned in the thickness direction;
- the optical disk being characterized in that at least one of recording layers has a first identification section storing an address of the tracks which are aligned in the thickness direction and one of which has the first identification section;
- and that the recording layers each have a second identification section storing an address of the recording layer which the second identification section belongs to, the second identification sections being shifted against one another in the tracking direction.
Dependencies are inferred from the claim text.