Optical disc device and lens tilt control method

Details Optical disc device and lens tilt control method Optical disc device and lens tilt control method

2008-06-05

2011-12-13

Hindi, Nabil Z (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S053190

Reexamination Certificate

active

08077565

ABSTRACT:
With an optical disc apparatus of the present invention, the number of tracks of an optical disc crossed by a light spot when the tracking control is inactive is measured and stored in a memory for each passage of a predetermined rotation angle. When the tracking control is active, a lens tilt driving signal is generated by multiplying the value of a memory section corresponding to the disc rotation angle by a gain according to the disc rotation speed, thereby correcting the AC tilt occurring due to a lens shift.

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International Search Report for corresponding application No. PCT/JP2008/001440 dated Sep. 16, 2008.

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