发明名称 |
OPTISK LESAPPARAT FOR AVLESNING AV EN SKIVFORMAD UPPTECKNINGSBERARE OCH SPECIELLT INSTELLNING AV LESSTRALKNIPPETS RADIELLA LEGE |
摘要 |
An optical read apparatus for reading a disc-shaped record carrier. A read element is mounted on an adjusting member by means of which the read element is radially movable. Moreover, there is provided a deflection element for correcting the radial position of the scanning spot. In order to enable an arbitrary information unit on the record carrier to be read with a short searching time, the drive of both the adjusting member and the deflection element is controlled. In order to enable the adjusting member to be moved in a rapid and controlled manner there is provided a position indicator, which indicates the instantaneous radial position of the read element. Moreover, there is included a correction circuit which eliminates the adverse effect of inaccuracies in the position indicator on the searching time. |
申请公布号 |
SE437894(B) |
申请公布日期 |
1985.03.18 |
申请号 |
SE19790008493 |
申请日期 |
1979.10.15 |
申请人 |
NV PHILIPS' GLOEILAMPENFABRIEKEN |
发明人 |
G L M * JANSEN;L G H * BOVEE |
分类号 |
G11B21/08;G11B7/00;G11B7/005;G11B7/085;G11B17/00;G11B21/10;(IPC1-7):G11B7/08;G02F1/29 |
主分类号 |
G11B21/08 |
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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