Device And Method For Controlling Disc Runout In An Optical Disc Drive System

Abstract

A device for controlling disc runout in an optical disc drive system (10) is described, comprising a rotatable support (12) having a rotation axis (16), the support (12) being arranged to hold a disc (14) such that a normal (18) of the disc (14) is essentially parallel to the rotation axis (16), a tilt means (36) arranged at said support (12) for tilting the disc (14), an optical pickup unit (26) arranged at the optical disc drive (10) for reading information from or writing information on the disc (14), the optical pickup unit (26) having a near field lens arrangement (28), and further comprising a control means (50) for controlling the tilt means (36) by means of a control signal (52) for adjustment of the normal (18) of the disc (14) to minimize the disc runout, wherein the control signal (52) is derived from a far field lens arrangement (38) additionally present in the drive system (10). Further, a method for controlling this runout is described.

Dependencies are inferred from the claim text.