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Techniques for writing and reading data on an optical disk which include formation of holographic optical gratings in plural locations on the optical disk
Techniques for writing and reading data on an optical disk which include formation of holographic optical gratings in plural locations on the optical disk
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机译:在光盘上写入和读取数据的技术,包括在光盘上多个位置形成全息光栅
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摘要
An optical memory for storing and/or reading data on an optical disk. The optical disk incorporates a material in which holographic gratings can be created, and subsequently detected, at plural locations within the disk by an electro-optical head. Creation and detection of holographic gratings with variable diffraction efficiency is possible with the electro-optical head. Multiple holographic gratings can also be created at each one of the plural locations via a beam of light which has a different wavelength or point of focus. These data elements can be read by the electro-optical head using a beam of light sequentially varied in wavelength or point of focus to correspond to the multiple holographic gratings to be recorded.
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