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OPTISK LESE-ENHET FOR LESING AV BEVEGELIG INFORMASJONBAERER SPESIELT FOR LESING AV VIDEOPLATE
OPTISK LESE-ENHET FOR LESING AV BEVEGELIG INFORMASJONBAERER SPESIELT FOR LESING AV VIDEOPLATE
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机译:用于阅读视频光盘的运动信息载体的光学阅读装置
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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.
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