Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Reexamination Certificate
2011-03-08
2011-03-08
Young, Wayne R (Department: 2627)
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
C369S053200, C369S053220, C369S044270
Reexamination Certificate
active
07903517
ABSTRACT:
An optical disk drive and a method for determining a disk type are described. The optical disk drive may be arranged to receive a radial error signal while an incident beam is focused onto the optical disk and before tracking the track, to analyze the radial error signal for detecting whether a wobble signal is present, indicating whether the track is wobbled, and to derive a disk type from the wobble signal, if present. The optical disk drive may additionally or alternatively be arranged to receive a central aperture signal while the incident beam is focused onto the optical disk and before tracking a track including a sequence of embossed pits, to analyze the signal amplitude of the central aperture signal, and to determine the disk type from at least a first variation of the signal amplitude of the central aperture signal as a function of time.
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Bakx Johannes Leopoldus
Claas Johannes Franciscus Petrus
Kuijper Maarten
Verbeek Petrus Antonius
Bernardi Brenda
Lite-On It Corporation
Thomas Kayden Horstemeyer & Risley LLP
Young Wayne R
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