Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1994-11-30
1996-03-12
Epps, Georgia Y.
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369 13, 3692754, 369 4426, 3692753, G11B 700
Patent
active
054992290
ABSTRACT:
On an optical disk, information is recorded on both grooves and lands as guide tracks for guiding a light beam. The width of each groove and that of each land are set substantially equal to each other. A plurality of series of pits representing address information are formed in the grooves so that the series of pits in a groove and the series of pits in the adjacent grooves are located in different radial directions of the optical disk. Address pits are not formed in any of the tracks formed by the lands. When the light beam scans the track on the land, the address information is obtained by crosstalk of the series of address pits formed in the track on the groove. This structure enables the management of the addresses of tracks having thereon no address pits. When obtaining the address information by reproducing the series of address pits on the groove, since no crosstalk occurs, accurate address information is obtained.
REFERENCES:
patent: 5280466 (1994-01-01), Tomita
patent: 5285440 (1994-02-01), Matsuda
patent: 5383176 (1995-01-01), Inui et al.
patent: 5402411 (1995-03-01), Maeda et al.
patent: 5422874 (1995-06-01), Birukawa et al.
patent: 5448552 (1995-09-01), Onagi
patent: 5452284 (1995-09-01), Miyagawa et al.
"Sony Magnetically Induced Super Resolution Magneto-Optical Disk", Journal of Magnetics Society of Japan, vol. 15, No. 5, 1991, pp. 838-845.
Murakami Yoshiteru
Ohta Kenji
Takahashi Akira
Chu Kim-Kwok
Conlin David G.
Epps Georgia Y.
Michaelis Brian L.
Sharp Kabushiki Kaisha
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