Optical disk apparatus with phase difference offset

Details Optical disk apparatus with phase difference offset Optical disk apparatus with phase difference offset

2004-04-06

2008-12-23

Battaglia, Michael V (Department: 2627)

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Reexamination Certificate

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07468939

ABSTRACT:
An optical pickup device capable of correcting an off-tracking which is ascribable to a phase shift of a differential push-pull signal waveform, even when an optical disk or an objective lens is tilted along a radial direction of the optical disk, so that stable tracking control can be performed; and, an optical disk apparatus comprising such an optical pickup device.

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International Search Report for corresponding PCT/JP2004/004975, mailed, May 18, 2004.

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