发明名称 |
Compact optical head including two light emitters having parallel optical axes |
摘要 |
A dichroic mirror of a polarized beam splitter is installed between a mirror and an objective lens as a beam synthesize/split means, in an optical system corresponding to a second dick and an optical system corresponding to a first disk arranged so as to form a two-layer structure. The dimension of the optical head in the width, length, and thickness directions are designed moderately.
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申请公布号 |
US6388976(B1) |
申请公布日期 |
2002.05.14 |
申请号 |
US20000515595 |
申请日期 |
2000.02.29 |
申请人 |
HITACHI, LTD.;HITACHI MEDIA ELECTRONICS CO., LTD. |
发明人 |
FUJITA SHINJI;SHINOHARA HIDENORI;SUGIYAMA TOSHIO;IMADA NOBUO;FUKUI YUKIO |
分类号 |
G11B7/14;G11B7/00;G11B7/12;G11B7/125;G11B7/135;(IPC1-7):G11B7/00 |
主分类号 |
G11B7/14 |
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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