Method of recording data in optical recording medium and an...

Details Method of recording data in optical recording medium and an... Method of recording data in optical recording medium and an...

2006-02-21

2006-02-21

Neyzari, Ali (Department: 2655)

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal processing for controlling recording light...

C369S047500, C369S100000

Reexamination Certificate

active

07002887

ABSTRACT:
A method for recording data in an optical recording medium according to present invention is constituted so that data are recorded in an optical recording medium including a light transmission layer and two recording layers by projecting a laser beam whose power is pulse-like modulated between a recording power and a bottom power lower than the recording power onto the optical recording medium from a side of the light transmission layer and forming recording marks having different lengths in the recording layers and that when a recording mark having a longer length than that of the shortest recording mark is to be formed in the recording layers by modulating the power of a laser beam using a single pulse, a time of raising the power of the laser beam to the recording power is delayed relative to a time of raising the power of the laser beam to the recording power when the shortest recording mark is to be formed. In the case of recording data in the optical recording medium in accordance with the thus constituted method for recording data in an optical recording medium, jitter of a reproduced signal obtained by reproducing the recorded data can be markedly reduced.

REFERENCES:
patent: 5949747 (1999-09-01), Miyashita et al.
patent: 62-204442 (1987-09-01), None

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