Record carrier with an optically readable information structure

Details Record carrier with an optically readable information structure Record carrier with an optically readable information structure

1979-06-07

1985-02-12

Psitos, Aristotelis M.

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369109, 369111, 369284, 369 51, G11B 582, G11B 706

Patent

active

044995741

ABSTRACT:
A record carrier is described having an optically readable information structure comprising trackwise arranged information areas which, in the track direction, alternate with intermediate areas, the information being contained in at least the local length of the information areas, of which information structure the average length of the information areas varies. It is demonstrated that by adapting the track period to the average length of the information areas in the tracks, the cross-talk between the tracks may be reduced without essentially reducing the information density.

REFERENCES:
patent: 3931457 (1976-01-01), Mes
patent: 4118734 (1978-10-01), Bouwhuis et al.
patent: 4125859 (1978-11-01), Oshida et al.
patent: 4157460 (1979-06-01), Bottali et al.
patent: 4157568 (1979-06-01), Ohki et al.
Applied Optics; Velzel, vol. 17, No. 13, 1 Jul. 1978, pp. 2029-2036, copy provided by applicant.

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