Method and device for recording data on an optical disc

Details Method and device for recording data on an optical disc Method and device for recording data on an optical disc

1993-05-04

1996-01-16

Dzierzynski, Paul M.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369100, 369109, 369 59, G11B 7007

Patent

active

054854490

ABSTRACT:
An optical disc recording device includes a motor for rotating an optical disc, a rotation speed control circuit connected to the motor for controlling a rotation speed of the optical disc, a data recording device for, during an irradiation time, irradiating a laser beam on the rotating optical disc in accordance with digital data to be recorded, wherein a pit having a length is formed on the optical disc, a recording speed setting device for designating a desired recording constant linear velocity, an irradiation time control circuit for controlling an actual irradiation time of the data recording device in accordance with a designated recording speed, wherein the actual irradiation time compared with predetermined irradiation time corresponding to a pit to be recorded is shortened in accordance with the designated recording speed, and a laser power control circuit for controlling a laser power of the laser beam to be irradiated for obtaining a predetermined pit length at the actual irradiation time. The irradiation time control circuit controls in such a manner that, when the recording speed is low, a ratio of amount of shortening of the actual irradiation time to the predetermined irradiation time is large and, when the recording speed is high, the ratio of the amount of shortening of actual irradiation time to the predetermined irradiation time is small.

REFERENCES:
patent: 4873680 (1989-10-01), Cherng et al.
patent: 4998237 (1991-03-01), Osakabe et al.
patent: 5003527 (1991-03-01), Matsumoto et al.

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