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Optical reading head inclination checking method

A technology of an optical reading head and a detection method, which is applied in the detection field of optical disc drives, and can solve the problems of low work efficiency and the like

Inactive Publication Date: 2008-11-26
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Claims
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Problems solved by technology

The above method not only cannot avoid human judgment errors, but also has low work efficiency

Method used

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  • Optical reading head inclination checking method

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Embodiment Construction

[0024] see Figure 5 , which is a flow chart of a method for detecting the inclination of an optical reading head in a preferred embodiment. The inclination detection method is to analyze and measure the image after the collimator 200 captures the light spot image to obtain the light spot image In order to determine whether the inclination of the optical pickup head 120 meets the requirements . The method for detecting the inclination of the optical reading head comprises the following steps:

[0025] Step S501 , receiving a plurality of light spot images, which are captured by the collimator 200 , and can also be obtained by other similar optoelectronic devices.

[0026] Step S503 , digitize the multiple images into digital images respectively, and the digitization indicates that the pixels in the part with light spots in the image are set to "1", and the pixels in the parts without light spots are set to "0". Such as Figure 6 As shown, it is a digital image 60, wherein ...

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Abstract

An optical pickup head inclination detecting method includes the steps of receiving a plurality of spot images, transforming the spot images into digital images, superposing the digital images to produce superposed images, building a coordinate system for the superposed images, analyzing the superposed images, identifying a first static spot, a second static spot and a moving spot and obtaining the coordinate values of the first static spot, the second static spot and the moving spot, and then calculating distance values between the first static spot and the moving spot and between the second static spot and the moving spot, according to the coordinate values of the first static spot, the second static spot and the moving spot, wherein the larger one of the two distance values is the maximum distance value, comparing the maximum distance value with a preset first critical distance value to obtain the result that whether the optical pickup head inclination meets the demand or not. The optical pickup head inclination detecting method can automatically identify static spots and moving spots of spot images, and accurately obtain the distance relation between the static spots and the moving spots, thereby determining whether the optical pickup head inclination meets the demand or not according to the distance relation.

Description

technical field [0001] The invention relates to a detection method for an optical disk drive, in particular to a detection method for the inclination of an optical pickup head. Background technique [0002] The optical reading mechanism mainly includes an optical reading head, a guide rod and a driving mechanism. As shown in FIG. 1 , it is a schematic diagram of the overall structure of an optical disc drive 10 . When reading the data on the optical disc 150, the optical pickup head 120 needs to move back and forth repeatedly along the two guide rods 106 (the other guide rod is not shown) under the drive of the stepping motor 108, if the two guide rods 106 are not parallel When this happens, the optical pickup head 120 cannot move smoothly, resulting in a reduction in the read / write capability of the optical disc drive 10 . In addition, even if the two guide rods 106 are parallel, the plane where the two guide rods 106 are located is not parallel to the rotation plane of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/09
CPCG11B7/22
Inventor 王俊杰
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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