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    • 7. 发明授权
    • Holographic recording method and filtering method
    • 全息记录方法和过滤方法
    • US06285474B1
    • 2001-09-04
    • US09577842
    • 2000-05-25
    • Katsunori KawanoJiro MinabeTakehiro NiitsuTsutomu IshiiYasunari NishikataKazuo Baba
    • Katsunori KawanoJiro MinabeTakehiro NiitsuTsutomu IshiiYasunari NishikataKazuo Baba
    • G03H116
    • G03H1/00G03H2222/31G06K9/76
    • A method and an apparatus capable of filtering based on desired spatial frequency characteristics without loss of Fourier spectrum frequency components, and of matched filtering of high recognition capability without losing functions of data recording and reconstruction as well as high-speed transmission and retrieval features and mass storage capacity characteristic of a holographic memory. Fourier transformed object light with 0° polarization of a target image is stored as a hologram using reference light having a spatial polarization distribution such that a daughter wavelet on scale m has 90° polarization. The hologram is retrieved using the Fourier transformed object light with 0° polarization. The hologram yields diffracted light in the form of a spatial frequency component which corresponds to scale m and is polarized 90° with respect to the other spatial frequency components. A polarizing element is used to extract only the spatial frequency component corresponding to scale m. Given reference light having a spatial polarization distribution in conformity with a shape of a spatial frequency filter, retrieval light of 0° polarization is applied for low-pass and high-pass filtering upon reconstruction.
    • 一种能够基于期望的空间频率特性进行滤波而不损失傅里叶谱频率分量的方法和装置,并且具有高识别能力的匹配滤波,而不失去数据记录和重建的功能,以及高速传输和检索特征和质量 全息存储器的存储容量特性。 使用具有空间极化分布的参考光,使得尺度为m的子小波具有90°偏振,将目标图像的0°偏振的傅里叶变换物体光存储为全息图。 使用具有0°极化的傅里叶变换的物体光来检索全息图。 全息图以空间频率分量的形式产生衍射光,其对应于刻度m并且相对于其它空间频率分量偏振90°。 偏振元件用于仅提取与刻度m对应的空间频率分量。 给定具有与空间频率滤波器的形状一致的空间极化分布的参考光,在重建时将0°偏振的检索光应用于低通和高通滤波。
    • 9. 发明授权
    • Optical storage medium, optical storage method, optical reading method, optical reading apparatus, optical retrieving method and optical retrieving apparatus
    • 光存储介质,光存储方法,光学读取方法,光学读取装置,光学检索方法和光学检索装置
    • US06452890B2
    • 2002-09-17
    • US09056798
    • 1998-04-08
    • Katsunori KawanoYasunari NishikataTsutomu Ishii
    • Katsunori KawanoYasunari NishikataTsutomu Ishii
    • G11B700
    • G11B7/128G11B7/006G11B7/0065G11B7/24G11B7/245G11B7/25
    • An optical storage medium of the present invention enables storage of data with high precision at high speed, and rewriting of data at high speed without an erasing process. Optical storage, reading and retrieving methods and optical storage, reading, and retrieving apparatuses using the medium are also provided. The optical storage medium has at least a polarization-sensitive member having the photo-induced birefringence property, such as a member made of polyester polymer having cyanoazobenzene as a side chain. The above apparatuses have spatial light modulator capable of modulating polarization. The modulator provides information of bit of two-dimensional data to each corresponding pixel by application or non-application of a voltage, and modulates the polarization of the beam incident on each pixel. Thereby, a signal beam transmitted through the spatial light modulator having a spatial polarization modulation corresponding to the two-dimensional data is obtained. The signal beam illuminates the optical storage medium, and at the same time, a reference beam illuminates the same region in the medium where the signal beam illuminates. Thus a hologram of the polarization modulation of the signal beam corresponding to the two-dimensional data is stored in the optical storage medium.
    • 本发明的光存储介质可以高速度地高精度地存储数据,并且无需擦除处理即可高速重写数据。 还提供光存储,读取和检索方法以及使用介质的光学存储,读取和检索设备。 光学存储介质至少具有光诱导双折射性的偏振敏感元件,例如由具有氰基偶氮苯作为侧链的聚酯聚合物制成的部件。 上述装置具有能够调制偏振的空间光调制器。 调制器通过应用或不施加电压向每个对应的像素提供二维数据位的信息,并且调制入射在每个像素上的光束的偏振。 由此,获得透过具有与二维数据对应的空间偏振调制的空间光调制器的信号光束。 信号光束照射光学存储介质,同时参考光束照射信号光束照射的介质中的相同区域。 因此,对应于二维数据的信号光束的偏振调制的全息图被存储在光学存储介质中。
    • 10. 发明授权
    • Optical storage medium, optical storage method; optical storage apparatus, optical reading method, optical reading apparatus, optical retrieving method and optical retrieving apparatus
    • 光存储介质,光存储方式; 光学存储装置,光学读取方法,光学读取装置,光学检索方法和光学检索装置
    • US06803153B1
    • 2004-10-12
    • US09708498
    • 2000-11-09
    • Katsunori KawanoYasunari NishikataTsutomu Ishii
    • Katsunori KawanoYasunari NishikataTsutomu Ishii
    • G03H110
    • G11B7/128G11B7/006G11B7/24G11B7/245G11B7/25
    • An optical storage medium of the present invention enables storage of data with high precision at high speed, and rewriting of data at high speed without an erasing process. Optical storage, reading and retrieving methods and optical storage, reading, and retrieving apparatuses using the medium are also provided. The optical storage medium has at least a polarization-sensitive member having the photo-induced birefringence property, such as a member made of polyester polymer having cyanoazobenzene as a side chain. The above apparatuses have spatial light modulator capable of modulating polarization. The modulator provides information of bit of two-dimensional data to each corresponding pixel by application or non-application of a voltage, and modulates the polarization of the beam incident on each pixel. Thereby, a signal beam transmitted through the spatial light modulator having a spatial polarization modulation corresponding to the two-dimensional data is obtained. The signal beam illuminates the optical storage medium, and at the same time, a reference beam illuminates the same region in the medium where the signal beam illuminates. Thus a hologram of the polarization modulation of the signal beam corresponding to the two-dimensional data is stored in the optical storage medium.
    • 本发明的光存储介质可以高速度地高精度地存储数据,并且无需擦除处理即可高速重写数据。 还提供光存储,读取和检索方法以及使用介质的光学存储,读取和检索设备。 光学存储介质至少具有光诱导双折射性的偏振敏感元件,例如由具有氰基偶氮苯作为侧链的聚酯聚合物制成的部件。 上述装置具有能够调制偏振的空间光调制器。 调制器通过应用或不施加电压向每个对应的像素提供二维数据位的信息,并且调制入射在每个像素上的光束的偏振。 由此,获得透过具有与二维数据对应的空间偏振调制的空间光调制器的信号光束。 信号光束照射光学存储介质,同时参考光束照射信号光束照射的介质中的相同区域。 因此,对应于二维数据的信号光束的偏振调制的全息图被存储在光学存储介质中。