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Method for adjusting optical reading head tilt angle of CD device

A technology of optical reading head and optical disc device, which is applied in the field of adjusting the inclination angle, and can solve problems such as poor data reading, errors, and inability to receive laser light

Inactive Publication Date: 2003-10-15
BENQ CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the assembly process of the optical disc device, if due to poor assembly, the laser light emitted by the optical pickup head 14 is not perpendicular to the optical disc 20 and has an angle, which is defined as the inclination angle 28, the optical pickup head 14 may be caused by this The inclination angle is 28, and the reflected laser light 22 cannot be received, resulting in poor data reading, errors, and even interruptions.
And when the density of data recording on the optical disc 20 increases, such problems will be more serious

Method used

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  • Method for adjusting optical reading head tilt angle of CD device
  • Method for adjusting optical reading head tilt angle of CD device
  • Method for adjusting optical reading head tilt angle of CD device

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Embodiment Construction

[0034] As shown in FIG. 1( a ), it is a common optical disc player. Such an optical disc device generally has an optical pick-up 14 and a lens 16 installed in the optical pick-up 14 . In addition, there are a first guide bar 11 and a second guide bar 12 carrying and guiding the optical pickup 14 to move, and a power device 18 carrying and driving an optical disc 20 to rotate.

[0035] When the optical disc device reads data, such as figure 2 As shown, the optical pickup head 14 emits a laser beam (laser beam) to the optical disc 20, and receives the reflected laser beam for data identification. However, if the relative position of the optical pick-up head 14 and the optical disc 20 is improper, the reflected laser light 22 may have an angle, which is defined as a tilt angle (tilt angle) 28, so that the reflected laser light 22 cannot pass through the lens 16 back. to the optical pickup head 14 . Therefore, it may happen that the data cannot be read or read incorrectly. The...

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Abstract

The regulating process of optical reading head inclination angle includes the following steps: shifting the optical reading head outside the racks, rotating the CD with driver, making the light from the light source project onto the CD and the lens, receiving the reflected light from the CD and the lens with the imaging device, display on the screen the locus of projected reflected light, and adjusting the track position with the driver based on the locus.

Description

technical field [0001] The invention relates to a method for adjusting the tilt angle, especially a method for adjusting the tilt angle of an optical pick-up head in an optical disc device. Background technique [0002] The optical pick-up head is used to read or record data on an optical disc, such as a digital video disc (DVD) or a compact disc (CD). As shown in Figure 1(a), a general optical disc device has a turntable (turn table) 18 for placing and rotating an optical disc 20, and an optical pick-up (optical pick-up) that moves along guide rails (guidebar) 11,12. )14. In addition, there is a motor (not shown in the figure) to drive the optical pickup head 14 to move along the guide rails 11 , 12 . The purpose is to enable the optical pick-up head 14 to move along the radial direction of the disc 20 and read data on the disc 20 . The guide rails 11, 12 have two ends respectively, and usually at least one end of each guide rail is fixed on the o...

Claims

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Application Information

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IPC IPC(8): G11B7/08G11B21/24
Inventor 林俊男林东龙刘兴华
Owner BENQ CORP