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

一种设备、倾角控制的技术，应用在用光学方法记录/重现、仪器、数据记录等方向，能够解决不可能实现等问题

Inactive Publication Date: 2008-04-30
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

Examples

Experimental program
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Effect test

Embodiment Construction

[0023] The preferred embodiment will now be described based on the tilt angle control operation in an optical disc player.

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

[0...

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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 a tilt angle control device and method for correcting the tilt angle of the recording surface of an optical disc (such as a recordable optical disc or a 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 maintained in a flat disc shape so that the optical axis of the optical pickup unit can be perpendicular to the recording surface of the disc during recording and reproduction operations. In order to scan the recording track, the optical pickup unit is moved in a radial direction aligned with the radius of the optical disc. [0004] However, the optical disc set in the optical disc motor is not flat, and the main reason lies in the manu...

Claims

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Application Information

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