Optical information recording disk having embossed clock mark pits and embossed information recording pits

摘要: In a first optical disk, plurality of sets bit information record cells, each cell including and clock marks are formed along track line on substrate, the cells for example as pits, wherein recording or reading to from is effected with laser head. The arranged at mutual intervals smaller than minimum read distance head, while provided so have set which larger head that can be recognized by used synchronization. Then, density improved. second recognition d spiral equiangular distances there an odd number per unit. Thus, even if pitch order distance, between adjacent wobble becomes about double independently tracking error detection.