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发明名称
Detection of focal point by means ot two split sensors at different positions along the optical axis
摘要
申请公布号
EP0953859(A3)
申请公布日期
2002.09.25
申请号
EP19990107915
申请日期
1999.04.21
申请人
NEC CORPORATION
发明人
OGURA, YUKIO;NAGAMATSU, KATSUNORI;MURAKAMI, SHINGO
分类号
G11B7/09;G02B7/34;(IPC1-7):G02B7/38;G02B21/24
主分类号
G11B7/09
代理机构
代理人
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