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    • 11. 发明申请
    • HOLOGRAM READING APPARATUS, HOLOGRAM READING METHOD, HOLOGRAM RECORDING APPARATUS AND HOLOGRAM RECORDING METHOD
    • HOLOGRAM读取装置,HOLOGRAM读取方法,HOLOGRAM记录装置和HOLOGRAM记录方法
    • US20090059328A1
    • 2009-03-05
    • US12114026
    • 2008-05-02
    • Yasuhiro OGASAWARA
    • Yasuhiro OGASAWARA
    • G03H1/12G03H1/16
    • G11B7/083G03H1/16G03H2240/61G11B7/0065G11B7/128G11B7/1378G11B7/1381
    • A hologram reading apparatus includes: a unit holding a hologram recording medium in which data page is recorded by irradiating as a single beam both reference light and signal light modulated by a spatial light modulator including a first pixel area for modulating the reference light and a second pixel area for modulating the signal light, a pitch of pixels in the first pixel area being different from that in the second pixel area; a Fourier transform lens subjecting reproduction light to a Fourier transformation; a filter disposed on a Fourier transform plane of the reproduction light by the Fourier transform lens, the filter shielding the reference light at a first spatial frequency band and transmitting the signal light at a second spatial frequency band; and a reading unit receiving the reproduction light transmitted through the filter and reading the data page modulated to the signal light included in the reproduction light.
    • 全息读取装置包括:保持全息图记录介质的单元,其中通过照射参考光和由包括用于调制参考光的第一像素区域的空间光调制器调制的信号光作为单个光束来记录数据页,并且第二 像素区域,用于调制信号光,第一像素区域中的像素间距与第二像素区域不同; 对再生光进行傅里叶变换的傅里叶变换透镜; 滤光器,其通过所述傅立叶变换透镜设置在所述再生光的傅里叶变换平面上,所述滤光器以第一空间频带对所述参考光进行屏蔽,并以第二空间频带发射所述信号光; 以及读取单元,接收通过滤波器传输的再现光,并读取调制到包括在再现光中的信号光的数据页。