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    Hologram reproduction method and apparatus
    11.
    发明申请
    Hologram reproduction method and apparatus 有权
    全息图再现方法和装置

    公开(公告)号：US20070146846A1

    公开(公告)日：2007-06-28

    申请号：US11527577

    申请日：2006-09-27

    申请人： Shin Yasuda ,  Katsunori Kawano ,  Koichi Haga ,  Jiro Minabe ,  Yasuhiro Ogasawara ,  Kazuhiro Hayashi ,  Hisae Yoshizawa ,  Makoto Furuki

    发明人： Shin Yasuda ,  Katsunori Kawano ,  Koichi Haga ,  Jiro Minabe ,  Yasuhiro Ogasawara ,  Kazuhiro Hayashi ,  Hisae Yoshizawa ,  Makoto Furuki

    IPC分类号： G03H1/16

    CPC分类号： G11B7/0065 ,  G03H1/041 ,  G03H2223/12 ,  G03H2223/20

    摘要： A hologram reproduction method for reproducing a hologram from an optical recording medium in which the hologram is recorded by Fourier transforming a signal light, in which digital data is represented by an image of intensity distribution, and a reference light, and simultaneously irradiating the lights in a state in which a direct current component is removed from at least the Fourier transformed signal light onto the optical recording medium is provided. The method including: irradiating a read out reference light onto the optical recording medium, and generating a diffracted light from the recorded hologram; generating all or a part of a direct current component contained in a Fourier transformed image of the signal light; combining the diffracted light and the generated all or a part of the direct current component, and generating a combined beam; and reproducing the signal light by inverse-Fourier transforming the combined beam.

    摘要翻译： 一种全息图再现方法，用于通过对其中数字数据由强度分布的图像表示的信号光和参考光进行傅里叶变换来记录全息图的光记录介质中再现全息图，同时将 提供了将直流分量从至少傅里叶变换信号光去除到光记录介质上的状态。 该方法包括：将读出的参考光照射到光学记录介质上，并从记录的全息图产生衍射光; 产生包含在信号光的傅里叶变换图像中的直流分量的全部或一部分; 组合衍射光和产生的全部或一部分直流分量，并产生组合光束; 以及通过对组合光束进行傅里叶逆变换来再现信号光。

    Hologram recording method, hologram recording device, hologram playback method, and optical recording medium
    14.
    发明授权
    Hologram recording method, hologram recording device, hologram playback method, and optical recording medium 有权
    全息记录方法，全息记录装置，全息图再现方法和光记录介质

    公开(公告)号：US07557970B2

    公开(公告)日：2009-07-07

    申请号：US11493611

    申请日：2006-07-27

    申请人： Makoto Furuki ,  Katsunori Kawano ,  Shin Yasuda ,  Jiro Minabe ,  Koichi Haga ,  Yasuhiro Ogasawara ,  Kazuhiro Hayashi ,  Hisae Yoshizawa

    发明人： Makoto Furuki ,  Katsunori Kawano ,  Shin Yasuda ,  Jiro Minabe ,  Koichi Haga ,  Yasuhiro Ogasawara ,  Kazuhiro Hayashi ,  Hisae Yoshizawa

    IPC分类号： G03H1/12

    CPC分类号： G11B7/0065 ,  G11B7/128 ,  G11B7/2403 ,  G11B7/24044 ,  Y10S359/90

    摘要： A hologram recording method, which records signal light onto an optical recording medium as a hologram, includes: placing a signal light region, which generates signal light, and a reference light region, which generates reference light, symmetrically with respect to an optical axis of coherent light by displaying, on a spatial light modulator which spatially modulates the incident coherent light, a pattern which divides a modulating region into a plurality of regions; generating signal light and reference light by modulating the incident coherent light by the spatial light modulator; simultaneously and coaxially illuminating, onto a reflecting-type optical recording medium, the signal light and the reference light generated from the signal light region and the reference light region disposed symmetrically to one another; and recording the signal light on the optical recording medium as a hologram.

    摘要翻译： 将信号光记录在作为全息图的光记录介质上的全息图记录方法包括：将产生信号光的信号光区域和产生参考光的参考光区域相对于光轴对称地生成参考光区域 在空间光调制器上显示相干光，空间光调制器对入射相干光进行空间调制，将调制区域划分为多个区域的图案; 通过调制来自空间光调制器的入射相干光产生信号光和参考光; 同时并同轴地照射到反射型光学记录介质上，信号光和从信号光区域产生的参考光和参考光区域彼此对称设置; 并将信号光记录在光记录介质上作为全息图。

    Data playback method and device
    15.
    发明申请
    Data playback method and device 有权
    数据播放方法和装置

    公开(公告)号：US20070147801A1

    公开(公告)日：2007-06-28

    申请号：US11482166

    申请日：2006-07-07

    申请人： Shin Yasuda ,  Yasuhiro Ogasawara ,  Jiro Minabe ,  Katsunori Kawano ,  Koichi Haga ,  Kazuhiro Hayashi ,  Hisae Yoshizawa ,  Makoto Furuki

    发明人： Shin Yasuda ,  Yasuhiro Ogasawara ,  Jiro Minabe ,  Katsunori Kawano ,  Koichi Haga ,  Kazuhiro Hayashi ,  Hisae Yoshizawa ,  Makoto Furuki

    IPC分类号： H04N5/00

    CPC分类号： G03H1/22 ,  G03H1/0005 ,  G03H1/16 ,  G06T5/50 ,  G11B7/0065

    摘要： There is provided a data playback method including: acquiring first image data by illuminating reference light for reading onto an optical recording medium on which a hologram has been recorded by Fourier transforming and simultaneously illuminating reference light and signal light expressing digital data as a light-and-dark image, and detecting an inverse Fourier-transform image of diffracted light which is diffracted by the recorded hologram; acquiring second image data, which is a reversal image of the first image data, by generating combined light by combining the diffracted light and a dc component whose phase is different than a phase of a dc component of the signal light included in the diffracted light, and detecting an inverse Fourier-transform image of the combined light; and computing a difference in luminance for each pixel of the light-and-dark image, by carrying out computing processing by using the first and second image data.

    摘要翻译： 提供了一种数据播放方法，包括：通过用参考光照亮参考光，通过傅里叶变换将照射参考光照射到已经记录了全息图的光记录介质上并同时照亮表示数字数据的信号光作为光，并获取第一图像数据，以及 并且检测被所记录的全息图衍射的衍射光的逆傅里叶变换图像; 通过组合衍射光和相位不同于包含在衍射光中的信号光的直流分量的相位的直流分量来产生组合光来获取作为第一图像数据的反转图像的第二图像数据， 以及检测所述组合光的逆傅里叶变换图像; 以及通过使用第一和第二图像数据执行计算处理来计算亮 - 暗图像的每个像素的亮度差。