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    • 8. 发明授权
    • Hologram recording/reproducing device and hologram reproducing device
    • 全息记录/再现装置和全息图再现装置
    • US07606133B2
    • 2009-10-20
    • US11527836
    • 2006-09-27
    • Atsushi FukumotoKenji TanakaKoji Ishioka
    • Atsushi FukumotoKenji TanakaKoji Ishioka
    • G11B7/00G03H1/00
    • G11B7/0065
    • A hologram recording/reproducing device records information onto a medium by a light beam emitted from a laser light source and passing through a forward path, the forward path having optical components in an area extending from the laser light source to the medium, and reproduces the recorded information by the light beam passing through a backward path, the backward path having optical components in an area extending from the medium to an array light detector. The device includes a spatial-light modulator and a first objective lens disposed in the forward path, and a second objective lens and a polarization-dependent diffraction element disposed in the backward path. The modulator generates signal light and reference light from the light beam emitted from the laser light source, the signal light and the reference light being spatially divided from each other and having a common light path. The first objective lens focuses the signal light and the reference light from the modulator onto the medium. The second objective lens forms a hologram image on the light detector based on reproduction light from the medium. The diffraction element is disposed in a hologram real-image plane and diffracts the reference light incident upon the light detector from the second objective lens.
    • 全息记录/再现装置通过从激光光源发射并穿过前进路径的光束将信息记录到介质上,前向路径在从激光光源延伸到介质的区域中具有光学部件,并且再现 由通过反向路径的光束记录的信息,后向路径在从介质延伸到阵列光检测器的区域中具有光学部件。 该装置包括设置在前向路径中的空间光调制器和第一物镜,以及设置在后向路径中的第二物镜和偏振相关衍射元件。 调制器产生来自激光光源发射的光束的信号光和参考光,信号光和参考光在空间上彼此分开并具有公共光路。 第一个物镜将来自调制器的信号光和参考光聚焦到介质上。 第二物镜基于来自介质的再现光在光检测器上形成全息图。 衍射元件设置在全息图实像平面中,并从第二物镜衍射入射到光检测器上的参考光。
    • 9. 发明申请
    • REPRODUCTION METHOD AND HOLOGRAM RECORDING MEDIUM
    • 复制方法和HOLOGRAM记录介质
    • US20090219798A1
    • 2009-09-03
    • US12357865
    • 2009-01-22
    • Kenji TANAKAAtsushi FukumotoMasaaki Hara
    • Kenji TANAKAAtsushi FukumotoMasaaki Hara
    • G11B7/00G03H1/04
    • G03H1/02G03H2001/0224G03H2223/13G03H2225/31G03H2225/33G03H2225/55G11B7/0065G11B7/1275G11B7/128G11B7/24044
    • Disclosed is a reproduction method for a hologram recording medium on which information is recorded with interference fringes of signal light and reference light, including: generating, based on light from a first light source, the reference light and coherent light caused to have uniform amplitude and phase, and irradiating the hologram recording medium with the reference light and the coherent light, the hologram recording medium including a recording layer on which the information is recorded with the interference fringes of the signal light and the reference light, a first reflection film formed on a lower surface side of the recording layer, and a gap layer formed between the recording layer and the first reflection film; and receiving the coherent light and a reproduction image that corresponds to recording information and is obtained as reflection light from the hologram recording medium through light irradiation in the light irradiation step, and reproducing the information based on a result of the light received.
    • 公开了一种全息图记录介质的再现方法,其上以信号光和参考光的干涉条纹记录信息,包括:基于来自第一光源的光,产生具有均匀振幅的参考光和相干光,以及 相位,并且用参考光和相干光照射全息图记录介质,全息图记录介质包括记录有信号光和参考光的干涉条纹的信息的记录层,形成在第一反射膜上的第一反射膜 记录层的下表面侧和形成在记录层和第一反射膜之间的间隙层; 并且在光照射步骤中通过光照射接收相干光和对应于记录信息并作为来自全息图记录介质的反射光获得的再现图像,并且基于所接收的光的结果再现信息。
    • 10. 发明申请
    • BEAM APPLYING METHOD, OPTICAL RECORDING MEDIUM, AND RECORDING AND REPRODUCING APPARATUS
    • 光束采用方法,光学记录介质,记录和再现装置
    • US20080285395A1
    • 2008-11-20
    • US12107588
    • 2008-04-22
    • Kenji TanakaAtsushi Fukumoto
    • Kenji TanakaAtsushi Fukumoto
    • G11B7/00
    • G11B7/1369G11B7/0065G11B7/00781G11B7/1275G11B7/1365G11B7/24038G11B7/24044
    • In a beam applying method, recording and reproducing operations are performed on an optical recording medium, in which a signal is recorded and reproduced by applying a beam thereto and which has a recording layer on which the signal is recorded, a quarter-wavelength plate formed below the recording layer, a polarizing plate formed further below the quarter-wavelength plate, and a reflecting film formed below the quarter-wavelength plate. The beam applying method includes the steps of; emitting a beam to be applied to the optical recording medium; and driving a quarter-wavelength plate inserted into an optical system serving to guide the emitted beam to the optical recording medium so that the optical axis direction thereof has a predetermined angle difference at the time of performing a recording operation and reproduction.
    • 在光束施加方法中,在光记录介质上执行记录和再现操作,其中通过向其施加光束来记录和再现信号,并且其上记录有信号的记录层,形成四分之一波长的板 在记录层下方,形成在四分之一波长板之下的偏振片,以及形成在四分之一波长板下方的反射膜。 光束施加方法包括以下步骤: 发射要施加到光学记录介质的光束; 并且驱动插入到用于将发射的光束引导到光学记录介质的光学系统中的四分之一波长的板,使得其在执行记录操作和再现时具有预定的角度差。