发明名称 |
Optical pickup apparatus |
摘要 |
An optical pickup apparatus has a semiconductor laser source which emits a laser beam in a wavelength band of 405 nm having an elliptic light intensity distribution; a beam shaping element which shapes the light intensity distribution of the laser beam; a polarizing beam splitter having a polarized light separation film in contact with the air and reflecting the laser beam shaped by the beam shaping element on the polarized light separation film; and an objective lens which focuses the laser beam reflected on the polarized light separation film onto an optical information recording medium.
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申请公布号 |
US2005111337(A1) |
申请公布日期 |
2005.05.26 |
申请号 |
US20040972970 |
申请日期 |
2004.10.25 |
申请人 |
HATANO TAKUJI;YAGI KATSUYA;ATARASHI YUICHI;ORI YUICHIRO |
发明人 |
HATANO TAKUJI;YAGI KATSUYA;ATARASHI YUICHI;ORI YUICHIRO |
分类号 |
G11B7/135;G11B7/00;(IPC1-7):G11B7/00 |
主分类号 |
G11B7/135 |
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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