Method for extending life of optically recorded information

Details Method for extending life of optically recorded information Method for extending life of optically recorded information

1986-08-15

1989-12-26

Faber, Alan

Registers

Coded record sensors

Particular sensor structure

235487, 369 54, 369 58, 369 84, G06K 500, G11B 2350, G11B 728

Patent

active

048899798

ABSTRACT:
A method for extending the life of information recorded on an optical storage medium, such as direct-read-after-write laser recording material. Information and an index are recorded on the medium. When the optical contrast ratio of the recording begins to deteriorate, when a specified error rate in reading data bits occurs, or after a predetermined time elapses, the information is re-recorded at another location on the medium and a new index entry is added.

REFERENCES:
patent: 3720923 (1973-03-01), Chen et al.
patent: 4360728 (1982-11-01), Drexler
patent: 4545044 (1985-10-01), Satoh et al.
patent: 4575827 (1986-03-01), Kulakowski
patent: 4582986 (1986-04-01), Stockburger et al.
patent: 4638472 (1987-01-01), Ogata et al.
patent: 4648085 (1987-03-01), Shimonou

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