METHOD AND DEVICE FOR RECORDING OPTICAL INFORMATION - Matsushita Electric Industrial Co., Ltd

Title:

METHOD AND DEVICE FOR RECORDING OPTICAL INFORMATION

Document Type and Number:

Japanese Patent JP3266971

Kind Code:

B2

Abstract:

PURPOSE: To reduce an error rate and to enlarge recording capacity by correcting a recording laser waveform to an optimum shape according to the change of a linear velocity when a pulse width modulated digital signal is overwritten on an optical disk by a laser spot.
CONSTITUTION: When a signal is recorded, first of all, the laser spot is cast on the optical disk 6, and an address signal provided on a signal track previously is read by an address regenerative circuit 12, and the linear velocity of a laser irradiated part is calculated by a system controller 13. When the linear velocity is smaller than the previously set value, a waveform correction circuit A is selected by a switch 14 as a waveform correction means, on the contrary, when the linear velocity is larger than the set value, the waveform correction circuit B is selected by the switch 14. In such a manner, an excellent recording mark with little distortion is obtained in the entire area of the optical disk and the jitters of a regenerative waveform is reduced.

Inventors:

Eiji Ohno
Kenichi Nagata
Kenichi Nishiuchi
Noboru Yamada
Nobuo Akahira

Application Number:

JP5986093A

Publication Date:

March 18, 2002

Filing Date:

March 19, 1993

Export Citation:

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