Error signal detection device for light recording/reproducing system

An error signal and detection device technology, which is applied in the recording/reproducing, digital recording/reproducing, digital signal error detection/correction and other directions by optical methods, and can solve the problems of serious defocusing and small defocusing of recorded data.

Inactive Publication Date: 2002-06-19
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, defocus problems can be severe in recording data, even if a small amount of defocus occurs

Method used

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  • Error signal detection device for light recording/reproducing system
  • Error signal detection device for light recording/reproducing system
  • Error signal detection device for light recording/reproducing system

Examples

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Embodiment Construction

[0048] refer to figure 2 According to the preferred embodiment of the error signal detection device for the optical recording / reproducing system of the present invention, the light beam LB that has been reflected / diffraction passed through the objective lens 17 and the optical path changer 15 from the information stream of the recording medium is received, and A tangential tilt error signal, a radial tilt error signal and / or a defocus error signal from the received light beam LB is detected. exist figure 2 Among them, reference numeral 11 represents a light source, and reference numeral 13 represents a collimating lens.

[0049] According to the present invention, an error signal detection device for an optical recording / reproducing system comprises: a photodetection unit for at least part of the light beam passing through the objective lens after reflection / diffraction from the recording medium information stream into multiple beam parts, and detect signals from the split...

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Abstract

An error signal detection apparatus for an optical recording / reproduction system, which is capable of accurately detecting a tangential tilt error signal, a radial tilt error signal, and / or a defocus signal, in consideration of the phase characteristics of each light beam portion reflected / diffracted from a recording medium, is provided. The error signal detection apparatus can accurately detect a tangential tilt error signal without being affected by radial tilt, defocus and detrack; a radial tilt error signal without being affected by tangential tilt, defocus and detrack; and / or a defocus error signal without being affected by tangential tilt, radial tilt and detrack.

Description

field of invention [0001] The present invention relates to an error signal detection device for an optical recording / reproduction system, and more particularly, to such an error signal detection device for an optical recording / reproduction system, which can Tilt, detecting a tangential tilt error signal and / or a radial tilt error signal and / or a defocus error signal using a main beam for recording an information signal on or reproducing an information signal from a recording medium. Background of the invention [0002] When the optical pickup scans a recording medium, such as an optical disk placed on a turntable and rotated, in a radial direction, the optical pickup records or reproduces an information signal on or from the recording medium. However, if the rotating optical disc is tilted with respect to the optical axis due to bending of the optical disc itself or misplacement, the recording / reproducing signal will be distorted. [0003] When in ord...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G11B20/18G11B7/09G11B7/095G11B7/13G11B7/131
CPCG11B7/0956G11B7/131G11B20/18
Inventor马炳寅朴仁植郑钟三全镇勋都台镕崔炳浩
OwnerSAMSUNG ELECTRONICS CO LTD