Method of optimally controlling the power of a recording laser b

Details Method of optimally controlling the power of a recording laser b Method of optimally controlling the power of a recording laser b

1991-04-17

1993-06-01

Psitos, Aristotelis

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 54, G11B 700

Patent

active

052166600

ABSTRACT:
This invention is directed to a method comprising the steps of detecting the intensity of a return laser beam from an optical recording medium of a recording laser beam for forming pits onto the optical recording medium at the time of a recording mode to record information thereon, and controlling a power of the recording laser beam on the basis of a ratio between a detected output of the intensity of a return laser beam within a predetermined time required until pits are actually formed on the optical recording medium and a detected output of the intensity of a return laser beam within a time period during which pits are actually formed, whereby even if the relationship between the recording laser power and pits formed varies due to characteristic unevenness, skew (inclination), or temperature of the medium, etc., this method permits formation of pits in a fixed reasonable dimension to carry out an optimum information recording.

REFERENCES:
patent: 4283785 (1981-08-01), Miyauchi et al.
patent: 4685097 (1987-08-01), van der Put
patent: 4701609 (1987-10-01), Koishi et al.
patent: 4788674 (1988-11-01), Maeda et al.
patent: 4949311 (1990-08-01), Barnard
patent: 4967284 (1990-10-01), Yoshida et al.
patent: 5043971 (1991-08-01), Van et al.

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