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    • 10. 发明申请
    • HOLOGRAM RECORDING/REPRODUCING APPARATUS AND METHOD
    • HOLOGRAM记录/再现设备和方法
    • US20100165427A1
    • 2010-07-01
    • US12640589
    • 2009-12-17
    • Chikara Tanioka
    • Chikara Tanioka
    • G03H1/02G03H1/22
    • G11B7/00772G11B7/083
    • An apparatus includes: a light source; a splitting unit that splits a light beam into an information beam and a reference beam; a spatial light modulator that modulates the information beam into a grating binary pattern having bright points and dark points; an irradiation unit that irradiates the reference beam and the information beam onto a hologram recording medium to record information corresponding to each of the regions of the spatial light modulator; a photodetector that detects a signal beam that is diffracted from the hologram recording medium by irradiating the hologram recording medium with a reproduction beam emitted by the light source; and a power detector that detects a difference of powers of signal beams detected by the photodetector at portions in the hologram recording medium corresponding to two of the regions of the spatial light modulator.
    • 一种装置,包括:光源; 分割单元,其将光束分解成信息光束和参考光束; 将信息光束调制成具有亮点和暗点的光栅二进制图案的空间光调制器; 照射单元,其将参考光束和信息光束照射到全息图记录介质上,以记录与空间光调制器的每个区域对应的信息; 光检测器,其通过用光源发射的再现光束照射全息图记录介质来检测从全息图记录介质衍射的信号光束; 以及功率检测器,其检测由所述光电检测器在对应于所述空间光调制器的两个区域的全息图记录介质中的部分处检测到的信号光束的功率差。