Overwritable optical recording medium and recording method of th

Details Overwritable optical recording medium and recording method of th Overwritable optical recording medium and recording method of th

1993-09-27

1997-04-29

Reinhart, Mark J.

Recorders

Record receivers and/or driving means therefor

Laminated, impregnated, or coated bases

346 742, G01D 900

Patent

active

056253885

ABSTRACT:
A recording mark having width (disk radius direction) larger than length (disk rotation direction) is formed by using the light intensity modulation method. The recording mark is ring-shaped. The ring part differs in optical characteristic from a part surrounded by the ring part. In order to form a ring-shaped mark, laser light having predetermined intensity is continuously radiated onto the recording medium. By modulating the intensity of the laser light, information is overwritten. The ring-shaped mark is set to have a width based upon the intensity of radiated laser light and the characteristic of the recording film.

REFERENCES:
patent: 5241520 (1993-08-01), Ohta et al.

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