发明名称 |
Laser power control in an optical recording system to compensate for variations in mark length resulting from a wobbled groove |
摘要 |
An apparatus and method for controlling laser power in an optical recording system in the presence of mark length variations produced by a groove wobble when an incident recording beam is off-track. An optical source supplies an incident write signal to an optical medium, such that data may be recorded on the medium during an incident write pulse as an optically-detectable mark. A reflection of the incident write signal from the medium is detected to provide a reflected write signal. A mark formation effectiveness (MFE) signal is generated from the reflected write signal to provide an indication of mark formation. A feedback circuit connected between the signal generator and the optical source controls a power level of the source in accordance with MFE signal variations produced by the wobbled groove.
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申请公布号 |
US5675568(A) |
申请公布日期 |
1997.10.07 |
申请号 |
US19960586082 |
申请日期 |
1996.01.16 |
申请人 |
EASTMAN KODAK COMPANY |
发明人 |
HAJJAR, ROGER A.;DURNIN, JAMES EUGENE;EASTMAN, CLARKE K. |
分类号 |
G11B7/0045;G11B7/007;G11B7/125;(IPC1-7):G11B7/00 |
主分类号 |
G11B7/0045 |
代理机构 |
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主权项 |
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地址 |
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