Optical disk data accessing device and method for correcting and adjusting optical head inclining anyle

Abstract

The invention discloses a kind of optical disk data accessing device, has an optical head tilt control module, which is used to control the tilt quantity, decreases flutter of regenerate signal. The optical tilt control module includes regenerate signal generating unit, which is used to receive the radio frequency signal generated by the optical head, and generates EFM signal; flutter examining device, receives EFM signal, and examines the flutter of EFM signal; tilt control unit, which is used to correct tilt control value, and selects better value, in adjusting period it generates the tilt control value according to regenerate data; and tilt driver for receiving tilt control value and generates tilt control signal to drive optical head to rotate.

Description

technical field

[0001] The present invention relates to an optical disc access device, in particular to an optical disc access device and an optical disc access device which reduces the jitter (jitter) of the read EFM (eight to fourteen modulation) signal by adjusting the tilt angle (tilt) of the optical head. Head tilt angle adjustment method. Background technique

[0002] The optical pickup of the optical recording and reading device needs an actuator to adjust the object lens so that the information read or recorded by the optical device, such as EFM (Eight to Fourteen Modulation) signal, can Stronger (robust). The adjuster can move the optical head precisely to the desired position (angle). However, when the optical disc to be read or recorded is curved, or the tilt angle of the optical head is incorrect, the read or recorded information will deteriorate. In order to compensate for the information deterioration, it is necessary to measure the relative inclination angl...

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