Method for controlling focus on label side

Details Method for controlling focus on label side Method for controlling focus on label side

2011-08-02

2011-08-02

Hindi, Nabil Z (Department: 2627)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

C369S044250

Reexamination Certificate

active

07990828

ABSTRACT:
A method for controlling focus on a label side of a light-scribe disc divides the label side into several zones, finds the maximum SBAD and the corresponding focus volt and spoke during focusing on each zone, approaches a primary focus volt level curve, compensates a predetermined volt to focus on the label side, checks the maximum SBAD and the corresponding focus volt and spoke between the primary focus volt level curve and the compensation volt on each zone, and approaches a calibrating focus volt level curve to reduce errors.

REFERENCES:
patent: 7120100 (2006-10-01), Hung et al.
patent: 7636285 (2009-12-01), Tokiwa
patent: 7847812 (2010-12-01), Wei et al.

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