| 摘要 |
A method of writing data or label information on an optical disc uses a non-Cartesian coordinate system. One or more uniform distances (204,206), as well as a plurality of positions (202A,202B,202C) on the optical disc are selected. Each position is separated from adjacent positions by one of the uniform distances, and is a substantially equally sized position where an optical beam can write a mark for data or for label information. The uniform distance may be equal to the diameter of the marking that the optical beam is able to write on the positions. The location on the optical disc specifiable to the same degree of precision by at least one integral coordinate. For example, positions on a spiral may be indicated by integral coordinates or zero, one, two and so on.
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