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经营范围
发明名称
Lens and optical pickup device
摘要
A lens is provided with a reflective annular zone face that is approximately perpendicular to the lens optical axis, and tilt of the reflective annular zone face is set to be equivalent to coma aberration resulting from the lens.
申请公布号
US2007008630(A1)
申请公布日期
2007.01.11
申请号
US20060481598
申请日期
2006.07.06
申请人
SANYO ELECTRIC CO., LTD.
发明人
HOTTA TOHRU;KAWASAKI RYOUICHI
分类号
G02B7/02
主分类号
G02B7/02
代理机构
代理人
主权项
地址
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