发明名称 |
Plastic lens, manufacturing method thereof, production tracing management method thereof, and optical pickup device |
摘要 |
A lens has a flange part at the outer periphery of its surface. A flange surface of the flange part is higher than the lens surface. The flange surface has a marking to identify a production jig, for example.
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申请公布号 |
US2009008809(A1) |
申请公布日期 |
2009.01.08 |
申请号 |
US20080216775 |
申请日期 |
2008.07.10 |
申请人 |
HITACHI MAXELL, LTD. |
发明人 |
KUWA TADAHIRO |
分类号 |
B29D11/00;B29C45/37;G11B7/135 |
主分类号 |
B29D11/00 |
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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