Optical recording medium having pit rows on every other boundary

Details Optical recording medium having pit rows on every other boundary Optical recording medium having pit rows on every other boundary

1995-06-06

1997-09-30

Edun, Muhammad N.

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369277, 369100, 369 58, 369 32, G11B 700

Patent

active

056732503

ABSTRACT:
Grooves and lands are provided to a magneto-optical disk so as to be alternately arranged, and recording bit strings are formed on the grooves and lands respectively so that information is recorded. Moreover, pit rows are formed on boundary sections between the adjoining grooves and lands so that address information of a recording/reproducing track is recorded, and the pit rows are formed every other boundary section. When the grooves and the lands are scanned as the recording/reproducing track by a light, an address of the recording/reproducing track is read out from the pit rows, and successively, discrimination is made whether the recording/reproducing track which is scanned by an optical spot is the groove or the land. This prevents crosstalk which causes inclusion of address information in the next pit rows, thereby, making it possible to obtain accurate address information. Moreover, since a total number of formed pit rows can be decreased and accuracy in a shape of pits is relieved, an optical recording medium can be easily produced.

REFERENCES:
patent: 5448552 (1995-09-01), Onagi
patent: 5493561 (1996-02-01), Nishiuchi et al.
"Improvement of Track Density by Land and Groove Recording on Phase Change Optical Disk," N. Miyagawa et al., Conference Digest, Joint International Symposium on Optical Memory and Optical Data Storage, 1993, pp. 57-58.
"Suppression of Crosstalk by Control of Groove Depth in Recording on Land and Groove," N. Miyagawa et al., Abstracts of the 53rd Lecture Meeting held by Applied Physics Association, No. 3, 18a-T-3, 1992, p. 948.
"Super Resolution in Magneto-Optical Disks," M. Kaneko et al., Journal of Applied Magnetics Institute, vol. 15, No. 5, 1991, pp. 838-844.

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