| 摘要 |
<p>PCT No. PCT/FR96/02005 Sec. 371 Date Aug. 21, 1997 Sec. 102(e) Date Aug. 21, 1997 PCT Filed Dec. 13, 1996 PCT Pub. No. WO97/23872 PCT Pub. Date Jul. 3, 1997Optical information recording/reading medium including at least one transparent layer (2) for recording or reading information in various strata (S1 to S3) distributed through the thickness of the medium. The medium includes, recorded in a principal plane at least the transparent layer with one or more information items (5) for carrying out either tracking, focusing, synchronization or addressing or any combination. Also included in each stratum is one more guidance information items (4).</p> |
