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    • 2. 发明申请
    • Hologram recording/reproducing device and optical unit
    • 全息记录/再现装置和光学单元
    • US20060171006A1
    • 2006-08-03
    • US11314441
    • 2005-12-21
    • Atsushi FukumotoMikio SugikiMitsuru ToishiNaoto KojimaHitoshi OkadaKoji Takasaki
    • Atsushi FukumotoMikio SugikiMitsuru ToishiNaoto KojimaHitoshi OkadaKoji Takasaki
    • G03H1/10
    • G11B7/1392G03H1/0404G03H1/12G03H1/26G03H2001/2675G11B7/0065
    • A hologram recording/reproducing device includes a laser light source emitting laser light; a spatial light modulator generating signal light and reference light from the laser light emitted from the laser light source, the signal light and the reference light traveling in a common light path; a first relay lens system including a first shielding plate at a focal position thereof and transmitting the signal light and the reference light generated by the spatial light modulator, the first shielding plate having a pinhole whose size is 1 to 2 times a Nyquist size; a phase modulating element disposed at a conjugate plane of the signal light and the reference light transmitted through the first relay lens system; an objective lens converging the signal light and the reference light transmitted through the phase modulating element on a hologram recording medium; and a light receiving system disposed between the phase modulating element and objective lens and receiving light returning from the hologram recording medium.
    • 全息记录/再现装置包括发射激光的激光光源; 产生从激光光源发射的激光的信号光和参考光的空间光调制器,信号光和在公共光路中行进的参考光; 第一中继透镜系统,包括在其焦点位置处的第一屏蔽板,并且传输信号光和由空间光调制器产生的参考光,第一屏蔽板具有尺寸为奈奎斯特尺寸的1至2倍的针孔; 设置在所述信号光的共轭平面上的相位调制元件和透过所述第一中继透镜系统的基准光; 物镜将信号光和通过相位调制元件透射的参考光会聚在全息图记录介质上; 以及设置在相位调制元件和物镜之间并接收从全息图记录介质返回的光的光接收系统。
    • 6. 发明授权
    • Hologram recording/reproducing device and optical unit
    • 全息记录/再现装置和光学单元
    • US07283286B2
    • 2007-10-16
    • US11314441
    • 2005-12-21
    • Atsushi FukumotoMikio SugikiMitsuru ToishiNaoto KojimaHitoshi OkadaKoji Takasaki
    • Atsushi FukumotoMikio SugikiMitsuru ToishiNaoto KojimaHitoshi OkadaKoji Takasaki
    • G03H1/10
    • G11B7/1392G03H1/0404G03H1/12G03H1/26G03H2001/2675G11B7/0065
    • A hologram recording/reproducing device includes a laser light source emitting laser light; a spatial light modulator generating signal light and reference light from the laser light emitted from the laser light source, the signal light and the reference light traveling in a common light path; a first relay lens system including a first shielding plate at a focal position thereof and transmitting the signal light and the reference light generated by the spatial light modulator, the first shielding plate having a pinhole whose size is 1 to 2 times a Nyquist size; a phase modulating element disposed at a conjugate plane of the signal light and the reference light transmitted through the first relay lens system; an objective lens converging the signal light and the reference light transmitted through the phase modulating element on a hologram recording medium; and a light receiving system disposed between the phase modulating element and objective lens and receiving light returning from the hologram recording medium.
    • 全息记录/再现装置包括发射激光的激光光源; 产生从激光光源发射的激光的信号光和参考光的空间光调制器,信号光和在公共光路中行进的参考光; 第一中继透镜系统,包括在其焦点位置处的第一屏蔽板,并且传输信号光和由空间光调制器产生的参考光,第一屏蔽板具有尺寸为奈奎斯特尺寸的1至2倍的针孔; 设置在所述信号光的共轭平面上的相位调制元件和透过所述第一中继透镜系统的基准光; 物镜将信号光和通过相位调制元件透射的参考光会聚在全息图记录介质上; 以及设置在相位调制元件和物镜之间并接收从全息图记录介质返回的光的光接收系统。
    • 9. 发明授权
    • Hologram recording/reproducing device and recording/reproducing optical apparatus
    • 全息记录/再现装置和记录/再现光学装置
    • US07965607B2
    • 2011-06-21
    • US11520481
    • 2006-09-13
    • Atsushi FukumotoMikio SugikiKenji TanakaNaoto KojimaMitsuru Toishi
    • Atsushi FukumotoMikio SugikiKenji TanakaNaoto KojimaMitsuru Toishi
    • G11B7/0065G11B7/00
    • G11B7/1374G03H1/0465G03H1/12G03H2223/13G03H2223/17G03H2225/55G11B7/0065G11B7/00772
    • A hologram recording/reproducing device includes a recording/reproducing optical unit performing recording and reproducing operations on a hologram recording/reproducing medium. The optical unit includes a laser light source emitting laser light; a spatial-light modulator generating signal light and reference light from the laser light, the signal light and reference light having a common light path; a phase mask disposed near the modulator or in a conjugate plane of the modulator and transmitting at least the reference light; and an objective lens including a first lens portion and a second lens portion. The first lens portion is disposed at an inner peripheral portion of the objective lens and serves as a Fourier transformation lens focusing the signal light to a predetermined point. The second lens portion is disposed at an outer peripheral portion of the objective lens and has focuses continuously or discretely disposed in an optical-axis direction of the objective lens and at portions in the medium near the predetermined point.
    • 全息记录/再现装置包括在全息记录/再现介质上执行记录和再现操作的记录/再现光学单元。 光学单元包括发射激光的激光光源; 产生来自激光的信号光和参考光的空间光调制器,信号光和参考光具有公共光路; 设置在所述调制器附近或所述调制器的共轭平面中并且至少透射所述参考光的相位掩模; 以及包括第一透镜部分和第二透镜部分的物镜。 第一透镜部分设置在物镜的内周部分,并且用作将信号光聚焦到预定点的傅里叶变换透镜。 第二透镜部分设置在物镜的外周部分处,并且在物镜的光轴方向上以及介质中靠近预定点的部分连续地或离散地设置。