Runout detection method

Details Runout detection method Runout detection method

2011-04-05

2011-04-05

Young, Wayne R (Department: 2627)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

C369S030240, C369S044320, C369S053120, C369S053190, C360S077040, C360S077020, C360S075000, C360S046000

Reexamination Certificate

active

07920448

ABSTRACT:
A method for determining runout disc is disclosed. The method comprises: focusing on a focal point on a disc; driving the disc to spin the disc; generating a crossover signal according to a track of the disc crossing the focal point; and determining that the disc is a runout disc when the frequency of the crossover signal exceeds a pre-determine value.

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