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Method for determining angle of recording/reading of CD pickup

A technology of read-write head and optical drive, which is applied to the configuration/installation of the head, and can solve the problem of time-consuming measurement of actions

Inactive Publication Date: 2006-03-08
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In summary, see Figure 5 As shown, it is a known method for picking the working angle of the optical read-write head of the optical drive. It can be seen from the figure that this method needs to consume a lot of time and unnecessary measurement actions

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  • Method for determining angle of recording/reading of CD pickup
  • Method for determining angle of recording/reading of CD pickup
  • Method for determining angle of recording/reading of CD pickup

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Embodiment Construction

[0018] See Figure 6 As shown, it is a schematic diagram of the jitter detection device 2 for an optical read / write head of the present invention, which includes a jig to simulate and adjust the tilt angle of the optical read / write head 1 (such as Figure 6 Θ), and a jitter meter 21, which is set on the fixture, and the jitter meter 21 can detect the jitter value of the optical pickup 1 at different inclination angles; please refer to Figure 7 Shown is the method for taking the angle of the optical read / write head of the optical drive, which includes the following steps:

[0019] (1) Provide a curved surface equation Z=ax 2 +by 2 +cx+dy+e, where x is the radial inclination, y is the tangential inclination, Z is the Jitter(x, y) value, and a, b, c, d, and e are unknown constants.

[0020] (2) Adjust the angle of the fixture five times arbitrarily, and obtain the inclination angle of five groups of optical pickups (x 1 , Y 1 ), (x 2 , Y 2 ), (x 3 , Y 3 ), (x 4 , Y 4 ) And (x 5 , Y ...

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Abstract

The present invention is a method for determining an operating angle of an optical reading and writing head of an optical driver, which is used in a jitter checking device comprising a fixture for simulating and adjusting the tilt angle of the optical reading and writing head and a jittering instrument for measuring the jitter value of the optical reading and writing head at the different tilt angles. In this method, the measured points are reduced to five by means of the empirical formula, and as the basis for adjusting the operating tilt angle of the optical reading and writing head, the minimum jitter value and the optimum tilt angle of the optical reading and writing head can be calculated rapidly without the necessity of performing the zero adjustment of the radial and tangential tilt angles respectively.

Description

Technical field [0001] The present invention relates to a method for taking the working angle of the optical read-write head of an optical drive, especially a method for calculating the minimum Jitter value and the best value of the optical read-write head without resetting the inclination angles in the radial and tangential directions to zero. inclination. Background technique [0002] During the manufacturing process of the optical read / write head 1a of the optical drive, due to the size and assembly errors of the parts, the optical path of the optical read / write head 1a is not perpendicular to the reference plane 2a, and an inclination angle θ (such as figure 1 Therefore, in the known technology, the manufacturer of the optical read / write head needs to measure the relationship between the jitter value (Jitter value) and the tilt angle for the radial and tangential directions, and calculate from them The optimal inclination angle of the optical head 1a in the radial and tangen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/09
Inventor 陈汉钊陈徵君陈伯睿
Owner LITE ON IT