发明名称 |
OPTICAL PICKUP AND OPTICAL INFORMATION STORAGE MEDIUM SYSTEM EMPLOYING THE OPTICAL PICKUP |
摘要 |
An optical pickup and a recording and/or reproducing apparatus having the same, the optical pickup including: a light source emitting a light beam; an objective lens focusing the emitted light beam onto a multi-layered optical information storage medium; a polarization dependent optical path changer changing a proceeding path of the light beam; a photodetector detecting a signal beam reflected from the optical information storage medium; and a polarization element provided on an optical path of the reflected signal beam, and reducing interference between the signal beam and a noise beam reflected from an adjacent layer on a light receiving plane by changing a polarization state of the signal beam in at least a portion where the signal beam overlaps with the noise beam.
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申请公布号 |
US2009109826(A1) |
申请公布日期 |
2009.04.30 |
申请号 |
US20080117227 |
申请日期 |
2008.05.08 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
PARK KYONGTAE;KIM TAE-KYUNG;BAE JAE-CHEOL |
分类号 |
G11B7/00 |
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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