Method for detecting an unbalanced disk in an optical disk...

Details Method for detecting an unbalanced disk in an optical disk... Method for detecting an unbalanced disk in an optical disk...

2005-08-23

2005-08-23

Hindi, Nabil (Department: 2655)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

C369S053190

Reexamination Certificate

active

06934232

ABSTRACT:
A method is provided for determining whether a rotating disk in an optical disk reading device is unbalanced. According to the method, the disk is first rotated at a preset rotational speed, and a lens is then located to a first position. Then, as the lens is moved towards a second position at a predetermined speed, a time duration during which a preliminary signal is generated is determined. The disk is determined to be unbalanced if the time duration exceeds a preset value.

REFERENCES:
patent: 5399849 (1995-03-01), Jung

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