Method and apparatus for detecting optimum recording power for a

Details Method and apparatus for detecting optimum recording power for a Method and apparatus for detecting optimum recording power for a

1997-02-24

2000-04-18

Tran, Thang V.

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

G11B 700

Patent

active

060523476

ABSTRACT:
An optical disk is provided with multiple data recording areas and optimum power control (OPC) areas encompassing each data recording area. The disk is formatted as a modified constant linear velocity (MCLV or ZCLV) disk. Test recordings are made in each OPC area and an optimum recording power distribution is determined based on the test recordings, according to radius and optimum recording power, at each OPC area. Optimum recording power for any track of a data recording area on the optical disk is determined by applying a radius of that track to the optimum recording power distribution which is linear in nature. Alternatively, the test recordings can be made in either a single or a reduced number of OPC areas based upon an innermost OPC area that, because of the ZCLV format, has recording areas maintained at linear velocities equivalent to all areas within each subsequent data recording area. Therefore, test recordings can be made in a single or reduced number of OPC areas. An apparatus and method is provided that identifies OPC areas, makes test recordings and determines a recording power distribution (optimum recording power line) for each data recording area of the disk.

REFERENCES:
patent: 4631713 (1986-12-01), Romeas et al.
patent: 5185733 (1993-02-01), Finkelstein et al.
patent: 5592452 (1997-01-01), Yoshimoto et al.
patent: 5629913 (1997-05-01), Kaku et al.
patent: 5703841 (1997-12-01), Hiroki

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