Optical disk apparatus

Details Optical disk apparatus Optical disk apparatus

2007-07-10

2007-07-10

Wellington, Andrea (Department: 2627)

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

C369S053190, C369S053140

Reexamination Certificate

active

10801549

ABSTRACT:
In an optical disk apparatus, after chucking an optical disk, the optical disk apparatus defers the start of the rotation of the optical disk, and measures the focusing drive voltage at two points, i.e., a point near a center of the optical disk and a point near an outer edge of the optical disk. Then, based on the measured values, the optical disk apparatus determine the angle at which the optical disk is slanted. Therefore, when the optical disk has been chucked inappropriately, the chucking state can be determined without rotating the optical disk, and scratching of the optical disk and damage to the optical disk apparatus can be prevented.

REFERENCES:
patent: 6041030 (2000-03-01), Ohmi
patent: 6842414 (2005-01-01), Park
patent: 06187712 (1994-07-01), None
patent: A-6-187712 (1994-07-01), None

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