发明名称 |
Optical pickup device and optical disk drive using the same |
摘要 |
An optical pickup device includes a light source unit an optical system which leads a return light beam to a predetermined light-receiving location and includes an object lens focusing each light beam from the light source unit to a recording surface of a corresponding storage medium and a photodetector arranged at the light-receiving location. The light source unit includes a plurality of light sources outputting light beams respectively, the plurality of light sources being arranged in proximity to each other, and a divergence-angle changing unit changing an angle of divergence of a light beam output from at least one of the plurality of light sources.
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申请公布号 |
US2003214898(A1) |
申请公布日期 |
2003.11.20 |
申请号 |
US20030411290 |
申请日期 |
2003.04.11 |
申请人 |
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发明人 |
OGATA TETSUYA;KITABAYASHI JUNICHI |
分类号 |
G11B7/00;G11B7/12;G11B7/125;G11B7/135;G11B7/22;(IPC1-7):G11B7/135 |
主分类号 |
G11B7/00 |
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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