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发明名称
OPTICAL SYSTEM, OPTICAL PICKUP APPARATUS, AND OPTICAL DISC APPARATUS FOR EXTRACTING SIGNAL BEAMS
摘要
An optical system for efficiently extracting plural signal beams from a bundle of rays reflected from a multilayer optical disc.
申请公布号
US2010135143(A1)
申请公布日期
2010.06.03
申请号
US20070091048
申请日期
2007.08.13
申请人
OGATA TETSUYA
发明人
OGATA TETSUYA
分类号
G11B7/00
主分类号
G11B7/00
代理机构
代理人
主权项
地址
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