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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: 2004-09-22
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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

Method used

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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 Image 6 As shown, it is a schematic diagram of the jitter detection device 2 used for the optical read-write head of the present invention, including a fixture, which is used to simulate and adjust the inclination angle of the optical read-write head 1 (such as Image 6 θ in), and a shake meter 21, which is arranged on the fixture, and the shake meter 21 can detect the shake value of the optical head 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 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 angles (x 1 ,y 1 ), (x 2 ,y 2 ), (x 3 ,y 3 ), (x 4 ,y 4 ) and (x 5 ,y 5...

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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 invention relates to a method for taking the working angle of an optical read-write head of an optical drive, especially a method for calculating the minimum Jitter value and the optimum inclination. Background technique [0002] During the manufacturing process of the optical read-write head 1a of the optical drive, the optical path (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 shown); 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 inclination angle for the radial (radial) and tangential (tangential) directions respectively, and calculate therefrom The optimum inclination angles of the optical read-write head 1a in the radial direction and the tangential direction are obtained. [0003] Further speaking, the Jitter value and its limit...

Claims

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Application Information

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