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发明名称
光拾取装置用对物光学元件,光拾取装置用对物光学元件单元及光拾取装置
摘要
本发明的构成是具备对特定波长的光束赋予实质的相位变化之光程差赋予构造,在上述光程差赋予构造中具有光拾取装置用光学元件,该光拾取装置用光学元件具有阶梯部,该阶梯部具备光轴方向的高度比上述波长λ1小的阶差。
申请公布号
TW200703297
申请公布日期
2007.01.16
申请号
TW095113670
申请日期
2006.04.17
申请人
柯尼卡美能达精密光学股份有限公司
发明人
木村彻
分类号
G11B7/09(2006.01)
主分类号
G11B7/09(2006.01)
代理机构
代理人
林志刚
主权项
地址
日本
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