发明名称 |
Techniques for writing and reading data on an optical disk which include formation of holographic optical gratings in plural locations on the optical disk |
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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申请公布号 |
US6898167(B2) |
申请公布日期 |
2005.05.24 |
申请号 |
US20010924218 |
申请日期 |
2001.08.07 |
申请人 |
CALIFORNIA INSTITUTE OF TECHNOLOGY |
发明人 |
LIU TSUEN-HSI;PSALTIS DEMETRI;MOK FAI H.;ZHOU GAN |
分类号 |
G11B7/0045;G11B7/005;G11B7/0065;G11B7/007;G11B7/12;G11B7/135;(IPC1-7):G11B7/00 |
主分类号 |
G11B7/0045 |
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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