发明名称 |
Solid immersion mirror type objective lens and optical pickup device adopting the same |
摘要 |
A solid immersion mirror (SIM) type objective lens and an optical pickup employing the same. The objective lens has a first curved surface which condenses incident light and a second curved surface surrounding the first curved surface which diverges incident light. A second transmission surface disposed to face the first transmission surface has an area which transmits incident light and a first reflection surface surrounding the second transmission surface which reflects incident light. A second reflection surface which surrounds the second curved reflects incident light. The objective lens realizes an NA of 0.7 or more with a single lens; has a working distance enabling far field recording/reproducing; has a smaller blocking area than that of the conventional SIM; and generates a smaller amount of side lobe. Where the objective lens is adopted in an optical pickup device, generation of jitter during reproduction or cross erasure during recording is minimized.
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申请公布号 |
US2002075785(A1) |
申请公布日期 |
2002.06.20 |
申请号 |
US20010012475 |
申请日期 |
2001.12.12 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
LEE CHUL-WOO;LEE KI-WON;JUNG SEUNG-TAE;KIM DAE-SIK |
分类号 |
G11B7/135;(IPC1-7):G11B7/135 |
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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