发明名称 |
Dynamic tracking control in an optical recording system by sensing mark formation |
摘要 |
An apparatus and method for providing dynamic tracking error detection and control in an optical recording system in which an incident beam records data on a medium in the form of marks. A mark formation effectiveness (MFE) signal is generated by monitoring a reflected write signal and is indicative of a characteristic of the marks formed on the medium. A position signal is generated to provide an indication of cross-track movement of the incident beam relative to a tracking structure on the medium. The tracking structure may be a wobbled groove on an optical disk recording medium. Variations in the MFE and position signals are correlated to provide a dynamic tracking error signal (TES). The MFE and position signal variations may be correlated by, for example, multiplying the two signals together in a multiplier circuit, or using the position signal to control application of the MFE signal to particular inputs of a signal difference circuit. The dynamic TES may be utilized in a servo loop with or without a push-pull signal or other conventional tracking signal.
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申请公布号 |
US5646919(A) |
申请公布日期 |
1997.07.08 |
申请号 |
US19960584933 |
申请日期 |
1996.01.16 |
申请人 |
EASTMAN KODAK COMPANY |
发明人 |
EASTMAN, CLARKE K.;HAJJAR, ROGER A. |
分类号 |
G11B7/0045;G11B7/09;(IPC1-7):G11B7/09 |
主分类号 |
G11B7/0045 |
代理机构 |
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地址 |
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