发明名称 |
PIVOT-AXIS HEAD OPTICAL-DISC APPARATUS |
摘要 |
An electro-optical apparatus comprising an objective (7) scans an optical disc (3) having a transparent protective layer (5) by means of a radiation beam (10) which, through the transparent layer, is focussed on a reflecting recording surface (4). The objective moves along the optical axis (19) for focussing the radiation beam on the recording layer and moreover performs limited pivotal movements. The position of the optical axis of the objective is corrected for obliquity of the surface of the optical disc, correction means (22A, B) being provided to tilt the objective through a correction angle, so that the angle between the optical axis and the normal to the disc surface is reduced. |
申请公布号 |
AU9024582(A) |
申请公布日期 |
1983.05.19 |
申请号 |
AU19820090245 |
申请日期 |
1982.11.08 |
申请人 |
PHILIPS: GLOEILAMPENFABRIEKEN, N.V. |
发明人 |
WILHELMUS ADRIANUS HENRICUS GIJZEN;GERARD EDUARD VAN ROSMALEN;BOB HOEKSTRA |
分类号 |
G11B7/08;G11B7/09;G11B7/095 |
主分类号 |
G11B7/08 |
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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