发明名称 |
Error signal detection apparatus for an optical recording/reproducing system |
摘要 |
An error signal detection apparatus for an optical recording/reproducing system including a light source emitting a light beam and an objective lens focusing the light beam to form a light spot on a recording medium, the apparatus including: a photodetecting unit dividing at least a part of the light beam passed through the objective lens after being reflected/diffracted from an information stream of the recording medium into light beam portions, and detecting the light beam portions; and a signal processor detecting phase differences between detection signals from the light beam portions to detect a tangential error signal, a defocus error signal, and/or a radial tilt error signal.
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申请公布号 |
US2002060970(A1) |
申请公布日期 |
2002.05.23 |
申请号 |
US20010986454 |
申请日期 |
2001.11.08 |
申请人 |
MA BYUNG-IN;PARK IN-SIK;CHUNG CHONG-SAM;JEON JIN-HOON;DOH TAE-YONG;CHOI BYOUNG-HO |
发明人 |
MA BYUNG-IN;PARK IN-SIK;CHUNG CHONG-SAM;JEON JIN-HOON;DOH TAE-YONG;CHOI BYOUNG-HO |
分类号 |
G11B20/18;G11B7/09;G11B7/095;G11B7/13;(IPC1-7):G11B7/00 |
主分类号 |
G11B20/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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