发明名称 Optical head system.
摘要 A super-resolution element (polarization phase shift plate) is positioned between a 1/4 wavelength plate and a polarization beam splitter so as to be able to adjust the distance between the super-resolution element and an object lens flexibly. The super-resolution element, 1/4 wavelength plate and object lens are driven all together by an actuator. <IMAGE>
申请公布号 EP0683484(A1) 申请公布日期 1995.11.22
申请号 EP19950107576 申请日期 1995.05.17
申请人 NEC CORPORATION 发明人 KATAYAMA, RYUICHI, C/O NEC CORP.
分类号 G11B7/12;G11B7/135 主分类号 G11B7/12
代理机构 代理人
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