发明名称 |
Compact dual wavelength optical pickup head |
摘要 |
A dual wavelength optical pickup head in which as many same parts as possible are used as well to direct light beams incident than light beams reflected from a reflective layer of an optical disk. The reuse of as many parts as possible allows to and a second wavelength emitted by a first and a second light source to an optical disk, a dual focus lens objective for focusing said light beams on a layer of said optical disk and a single detector which allows to detect light beams of either said first or said second wavelength.
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申请公布号 |
US6304542(B1) |
申请公布日期 |
2001.10.16 |
申请号 |
US19980173961 |
申请日期 |
1998.10.16 |
申请人 |
DEUTSCHE THOMSON-BRANDT GMBH |
发明人 |
DANG LIEU-KIM;DIETRICH CHRISTOPH;RICHTER HARTMUT;SCHROEDER HEINZ-JOERG |
分类号 |
G11B7/00;G11B7/09;G11B7/12;G11B7/125;G11B7/13;G11B7/135;(IPC1-7):G11B7/00 |
主分类号 |
G11B7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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