OPTICAL PICKUP DEVICE, PHOTODETECTION ELEMENT AND FOCUS ERROR SIGNAL DETECTION METHOD,申请号JP19920238881-传众专利搜索

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发明名称	OPTICAL PICKUP DEVICE, PHOTODETECTION ELEMENT AND FOCUS ERROR SIGNAL DETECTION METHOD
摘要
申请公布号	JPH0668541(A)	申请公布日期	1994.03.11
申请号	JP19920238881	申请日期	1992.08.17
申请人	SONY CORP	发明人	ANDO NOBUHIKO
分类号	G02B5/18;G11B7/095;G11B11/10;G11B11/105;(IPC1-7):G11B11/10	主分类号	G02B5/18
代理机构		代理人
主权项
地址

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