| 发明名称 |
OPTICAL FOCUSSING DEVICE |
| 摘要 |
<p>In order to improve the focussing of a radiation source at an object, for 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.</p> |
| 申请公布号 |
CA1183259(A) |
申请公布日期 |
1985.02.26 |
| 申请号 |
CA19810384733 |
申请日期 |
1981.08.27 |
| 申请人 |
N.V. PHILIPS'GLOEILAMPENFABRIEKEN |
发明人 |
VAN ROSMALEN, GERARD E.;OPHEIJ, WILLEM G. |
| 分类号 |
G02B7/28;G11B7/08;G11B7/09;G11B7/095;(IPC1-7):G11B7/00 |
主分类号 |
G02B7/28 |
| 代理机构 |
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