| 发明名称 |
OBJECTIVE LENS |
| 摘要 |
<p>In an objective lens (1) shared by various kinds of optical disks using different wavelengths, damage due to collision between the disk and lens is avoided. A protective member (1b) is provided in the entire periphery or in a part of the periphery of a protective protrusion (1p) of the objective lens (1). The protective member (1b) may replace the protective protrusion (1p).</p> |
| 申请公布号 |
WO0049445(A1) |
申请公布日期 |
2000.08.24 |
| 申请号 |
WO2000US04327 |
申请日期 |
2000.02.18 |
| 申请人 |
SONY COMPUTER ENTERTAINMENT, INC.;SONY COMPUTER ENTERTAINMENT AMERICA |
发明人 |
MIURA, KAZUO |
| 分类号 |
G02B1/10;G02B3/00;G02B7/02;G02B13/00;G11B7/135;(IPC1-7):G02B17/00;G02B3/02 |
主分类号 |
G02B1/10 |
| 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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