发明名称 |
Optical focussing device with inclination detection |
摘要 |
In order to improve the focussing of radiation from a source onto an object, in example for a "VLP" or "Compact Disk" system, a further control signal from an object-inclination detector is added to the focussing error signal, yielding improved control stability and smaller focussing errors.
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申请公布号 |
US4374324(A) |
申请公布日期 |
1983.02.15 |
申请号 |
US19800205554 |
申请日期 |
1980.11.10 |
申请人 |
U.S. PHILIPS CORPORATION |
发明人 |
VAN ROSMALEN, GERARD E.;OPHEIJ, WILLEM G. |
分类号 |
G02B7/28;G11B7/08;G11B7/09;G11B7/095;(IPC1-7):G01J1/20 |
主分类号 |
G02B7/28 |
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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