| 发明名称 |
OPTICAL FOCUSSING DEVICE |
| 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. |
| 申请公布号 |
AU7470381(A) |
申请公布日期 |
1982.03.11 |
| 申请号 |
AU19810074703 |
申请日期 |
1981.08.28 |
| 申请人 |
PHILIPS: GLOEILAMPENFABRIEKEN, N.V. |
发明人 |
GERARD EDUARD VAN ROSMALEN;WILLEM GERARD OPHEIJ |
| 分类号 |
G02B7/28;G11B7/08;G11B7/09;G11B7/095 |
主分类号 |
G02B7/28 |
| 代理机构 |
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代理人 |
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| 地址 |
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