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Method and device for performing tilt correction using multi-dimensional actuator

A technology of equipment and inclination control, which is applied in the direction of optical recording/reproduction, instrumentation, data recording, etc., and can solve problems such as impossibility

Inactive Publication Date: 2005-07-27
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, this calibration is not possible for transmissions that use three-dimensional actuators to compensate for inclination

Method used

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  • Method and device for performing tilt correction using multi-dimensional actuator
  • Method and device for performing tilt correction using multi-dimensional actuator
  • Method and device for performing tilt correction using multi-dimensional actuator

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Experimental program
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Embodiment Construction

[0023] The preferred embodiment will now be described in terms of tilt control operation in an optical disc player.

[0024] exist figure 1 In , the tilt angle control device or device shown is used to correct the tilt angle with respect to the optical disc 1 . Said inclination control device includes an optical pickup unit comprising a movable carriage or sledge 4 for moving the optical pickup unit on a platform 5 in a radial direction. The optical pick-up unit comprises an optical head 2, which guides towards and receives a radiation beam from the optical disc 1, passes it through a three-dimensional actuator 11, and said three-dimensional actuator 11 performs a function through a three-dimensional execution based on a split-tapped focusing coil. Control focus, tilt, and radial position of 3D actuators. The focus coil of each divided tap of the three-dimensional actuator 11 is driven according to an autofocus control signal received from the processor 10 .

[0025] In add...

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PUM

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Abstract

The present invention relates to method and device for performing tilt control. A focus and a tilt controlling output is generated, and a focusing and tilt state of an optical recording / reproducing beam is controlled by determining a radial tilt value based on a differentiation of focus control values obtained at different radii of said optical disk ( 1 ). The combination of e.g. a 3D actuator with the dz / dr tilt measurement provides the advantage that focus and tilt adjustment can be performed in the same element. Thereby, influences or measurement variations caused by environmental conditions and / or circuit characteristics can be minimized to reduce compensations requirements. Furthermore, a 3D actuator ( 11 ) with a split coil arrangement may be used to provide a three-dimensional focus adjustment. Thereby, the 3D actuator ( 11 ) can be used for feed forward tilt compensation without offset or gain errors and without any additional sensor.

Description

technical field [0001] The present invention relates to an inclination control apparatus and method for correcting an inclination of a recording surface of an optical disc such as a recordable optical disc or an optical read only optical disc by using a multi-dimensional actuator such as a three-dimensional actuator. Background technique [0002] In recent years, optical disc devices for recording and reproducing large amounts of data have been developed. [0003] In principle, when an optical disc is set in an optical disc motor, the optical disc should be kept in a flat disc shape so that the optical axis of the optical pickup unit can be made perpendicular to the recording surface of the disc during recording and reproducing operations. To scan the recording track, the optical pickup unit moves in a radial direction aligned with the radius of the disc. [0004] However, the disc set in the disc motor is not flat, mainly due to the manufacturing process. The optical disk...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/095
CPCG11B7/0956G11B7/095
Inventor J·A·L·J·拉亚马克斯
Owner KONINK PHILIPS ELECTRONICS NV