发明名称 |
PHOTO DIODE IC |
摘要 |
<p>A photodetector detecting reflected light components from an optical medium, the photodetector including a first detector divided into eight sections detecting the reflected light components and converting the light components into electrical signals, a first calculating portion calculating a first tracking error signal from the electrical signals by a differential push-pull method, a second calculating portion calculating a first focusing error signal by an astigmatism method and calculating a second tracking error signal by a differential phase detection method from the electrical signals converted by the first detector; a second detector divided into four sections detecting the reflected light components reflected by the optical recording medium to convert the light components into electrical signals; and a third calculating portion calculating a second focusing error signal by the astigmatism method and calculating a third tracking error signal by the differential phase detection method from the electrical signals converted by the second detector.</p> |
申请公布号 |
EP1665243(B1) |
申请公布日期 |
2010.12.15 |
申请号 |
EP20030751580 |
申请日期 |
2003.10.17 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
PARK, SOO-HAN;KIM, JONG-UK |
分类号 |
G11B7/00;G11B7/09;G11B7/12;G11B7/125;G11B7/13 |
主分类号 |
G11B7/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|