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公开(公告)号:US06269066B1
公开(公告)日:2001-07-31
申请号:US09035824
申请日:1998-03-06
申请人: Roland H Chase
发明人: Roland H Chase
IPC分类号: G11B700
CPC分类号: G11B7/0901 , G11B7/08552 , G11B7/1245 , G11B7/14
摘要: A composite interferometer and electro-optical prism provide a means to control the position of a spot of light to read and write data on an optical disc. In this invention each light ray from a spectral source of a cone of light rays is regenerated into a plurality of light rays by an interferometer. These rays are transmitted through an electro-optic crystal and focused by a lens into a constructive interference fringe on an optical disc. A voltage across the electro-optical crystal and magnetic field inside the spectral source define the position of the constructive interference fringe on the disc.
摘要翻译: 复合干涉仪和电光棱镜提供了控制光点的位置以读取和写入光盘上的数据的手段。 在本发明中,来自光束的光谱源的每个光线通过干涉仪被再生成多个光线。 这些光线通过电光晶体透射并被透镜聚焦成光盘上的建构性干涉条纹。 频谱源内的电光晶体和磁场之间的电压限定了盘上的相长干涉条纹的位置。