| 摘要 |
PROBLEM TO BE SOLVED: To offer a movable data medium compatible with monotrack monobeam system. SOLUTION: A flag 71 contains a section 710 in a center axis 70 of a track, a second section 711-G displaced to the left of the center axis 70, and the second section 711-D displaced to the right of the center axis 70. Data zone 72 is provided between the two flags 71. This form is repeated. A distance between the offset section (711-G, 711-D) and the center axis 70 of the track is assumed to be an order of a fraction of a tracking spot width. |
