发明名称 |
Compatible optical pickup capable of scanning multiple tracks |
摘要 |
<p>An optical pickup capable of multiple track scanning, including a light source (30) having at least two vertical cavity surface emitting lasers (VCSELs) to emit at least two or more light beams and a light controlling device (70) for controlling the focal position of a light formed on one type of recording medium (1) of two formats of different thicknesses, is provided. The light emitted from each VCSEL is focused on adjacent tracks of the recording medium (1) via a polarization beam splitter (40), the light controlling device (70) and an objective lens (80) in sequence, and the light reflected from the recording medium (1) is received by a photodetector (100) via the objective lens (80), the light controlling device (70) and the polarization beam splitter (40). The number of photodetectors correspond to the number of VCSELs to receive lights corresponding to each track. <IMAGE></p> |
申请公布号 |
EP0840306(A2) |
申请公布日期 |
1998.05.06 |
申请号 |
EP19970308530 |
申请日期 |
1997.10.27 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
PARK, SOO-HAN;WON, JONG-HWA;PARK, CHUN-SEONG |
分类号 |
G11B7/08;G11B7/00;G11B7/125;G11B7/13;G11B7/135;G11B7/14;G11B19/12;H01L31/12;H01S5/022;H01S5/183;(IPC1-7):G11B7/12 |
主分类号 |
G11B7/08 |
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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