Adjusting method for disc oblique angle of optical head driving unit based on flare shift |
Title: |
Adjusting method for disc oblique angle of optical head driving unit based on flare shift |
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Application Number: |
200410046358 |
Application Date: |
2004/06/07 |
Announcement Date: |
2005/02/23 |
Pub. Date: |
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Publication Number: |
1585004 |
Announcement Number: |
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Grant Date: |
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Granted Pub. Date: |
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ApplicationType: |
Invention |
State/Country: |
11[China|beijing] |
IPC: |
G11B 7/09 |
Applicant(s): |
Tsinghua Univ. |
Inventor(s): |
Ma Jiashe, Pan Longfa, Xu Duanyi |
Key Words: |
Adjusting method, disc oblique angle, optical head, driving unit, flare shift |
Abstract: |
In this method, the original reflected facular is acquired, which is divided into four parts according to the rectangular coordinate system. On these four parts, the optoelectronic conversion is processed respectively, with the result of four voltages, the difference and the sum of the light intensity are calculated. In the rectangular coordinate system, with the position of the facular as the origin point, according to the relationship between the position of the facular and the original point, the angle of the CD can be adjusted. |
Claim: |
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Priority: |
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PCT: |
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