发明名称 |
OPTICAL RECORD READER SCAN AND FOCUS WOBBLE |
摘要 |
An optical read unit for reading radiation-reflecting video discs comprises a semiconductor laser which with the aid of a scan wobbler and a focussing wobbler is moved at high frequency in two directions relative to the video disc, a radial direction for tracking purposes and a direction normal to the disc for the purpose of automatic focussing. The semiconductor diode laser is mounted on a metal radiation source carrier which is connected to a heat sink for carrying off the heat with a low temperature gradient, and is driven by piezo-electric plates. |
申请公布号 |
NZ189131(A) |
申请公布日期 |
1982.02.23 |
申请号 |
NZ19780189131 |
申请日期 |
1978.12.08 |
申请人 |
PHILIPS NV |
发明人 |
KLEUTERS W;ROSMALEN G;IMMINK K;BIERHOFF M |
分类号 |
G02B7/28;G02B7/09;G11B7/08;G11B7/09;G11B7/12;H01S5/024 |
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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