公开(公告)号：US20070146838A1

公开(公告)日：2007-06-28

申请号：US10593564

申请日：2005-03-25

申请人： Mitsuru Toishi ,  Hitoshi Okada ,  Tomiji Tanaka

发明人： Mitsuru Toishi ,  Hitoshi Okada ,  Tomiji Tanaka

IPC分类号： G03H1/12

CPC分类号： G11B7/0065 ,  G03H1/28 ,  G11B7/00772 ,  G11B7/128

摘要： A hologram recording device can easily perform multiplex recording/reproduction on a hologram recording medium. The hologram recording device includes an optical system and a distance controlling mechanism. The optical system focuses on a substantially same location of a hologram recording medium a signal light modulated at a light modulating element and a reference light whose phase has been modulated at a phase modulating element. The distance controlling mechanism controls a distance between the phase modulating element and the hologram recording medium. By controlling the distance between the phase modulating element and the hologram recording medium, multiplex recording can be performed on the hologram recording medium. In an ordinary phase-correlation multiplexing method, multiplex recording is performed as a result of shifting a light-focusing location in the direction of a surface of the hologram recording medium, whereas, in the present invention, it is possible to perform the multiplex recording without shifting the light-focusing location in the direction of the surface of the hologram recording medium. It is possible to further increase recording capacity as a result of shifting the light-focusing location in the direction of the surface of the hologram recording medium. Here, compared to the ordinary phase-correlation multiplexing method, it is possible to perform shifting by a sufficient amount.

摘要翻译： 全息记录装置可以容易地在全息图记录介质上执行多重记录/再现。 全息记录装置包括光学系统和距离控制机构。 光学系统集中在全息图记录介质的基本相同的位置处，在光调制元件处调制的信号光和其相位已经在相位调制元件被调制的参考光。 距离控制机构控制相位调制元件与全息图记录媒体之间的距离。 通过控制相位调制元件和全息图记录介质之间的距离，可以对全息图记录介质进行多重记录。 在通常的相位相关复用方法中，作为在全息图记录介质的表面方向移动聚光位置的结果进行复用记录，而在本发明中，可以执行多路记录 而不会在全息图记录介质的表面的方向上移动聚焦位置。 可以通过沿全息图记录介质的表面方向移动聚光位置来进一步提高记录容量。 这里，与普通相位相关复用方式相比，能够进行足够的移位。

公开(公告)号：US07502151B2

公开(公告)日：2009-03-10

申请号：US11388473

申请日：2006-03-24

申请人： Mitsuru Toishi ,  Tomiji Tanaka ,  Mikio Sugiki

发明人： Mitsuru Toishi ,  Tomiji Tanaka ,  Mikio Sugiki

IPC分类号： G03H1/02

CPC分类号： G11B7/0065 ,  G11B7/00781 ,  G11B7/126

摘要： A holographic recording and reconstructing apparatus includes a light source having a variable oscillation wavelength; a temperature sensing unit operable to sense temperature; and a control unit operable to record information about a temperature sensed by the temperature sensing unit on a holographic recording medium during recording, to obtain the information about the temperature from the holographic recording medium and obtain a temperature sensed by the temperature sensing unit during reconstruction, to determine the amount of wavelength shift to counteract the effects of a change in the dimension of the holographic recording medium between recording and reconstruction based on the difference between the temperatures, and to shift the oscillation wavelength of the light source by the determined amount.

摘要翻译： 全息记录和重建装置包括具有可变振荡波长的光源; 温度检测单元，其可操作以感测温度; 以及控制单元，其可操作以在记录期间在全息记录介质上记录关于由温度感测单元感测的温度的信息，以获得关于来自全息记录介质的温度的信息，并获得在重建期间由温度感测单元感测的温度， 确定波长偏移的量，以抵消在记录和重构之间的全息记录介质的尺寸变化的影响，基于温度之间的差异，并且将光源的振荡波长移动所确定的量。

公开(公告)号：US20070258118A1

公开(公告)日：2007-11-08

申请号：US11683249

申请日：2007-03-07

申请人： Mitsuru Toishi ,  Tomiji Tanaka ,  Atsushi Fukumoto ,  Kenjiro Watanabe

发明人： Mitsuru Toishi ,  Tomiji Tanaka ,  Atsushi Fukumoto ,  Kenjiro Watanabe

IPC分类号： G03H1/12

CPC分类号： G11B7/0065 ,  G03H1/12 ,  G11B7/00781 ,  G11B7/0938 ,  G11B7/126 ,  G11B7/128 ,  G11B7/1378 ,  G11B2007/13727

摘要： A hologram recording and reconstruction apparatus records and reconstructs a hologram in a recording layer of a holographic recording medium using a signal light beam and a reference light beam is provided. The hologram recording and reconstruction apparatus includes an objective lens for allowing the signal light beam, the reference light beam, and a diffracted light beam to pass therethrough, a spatial light modulator on which a reference light beam pattern for generating the reference light beam is displayed, a temperature sensor for detecting the temperature of the holographic recording medium, and a control unit for controlling the spatial light modulator to reduce the reference light beam pattern so that the reference light beam passes through the more inner portion of the objective lens or enlarge the reference light beam pattern so that the reference light beam passes through the more outer portion of the objective lens in accordance with the temperature.

摘要翻译： 全息记录和重建装置使用信号光束和参考光束来记录和重建全息记录介质的记录层中的全息图。 全息记录重建装置包括用于允许信号光束，参考光束和衍射光束通过的物镜，其上显示用于产生参考光束的参考光束图案的空间光调制器 ，用于检测全息记录介质的温度的温度传感器，以及控制单元，用于控制空间光调制器以减小参考光束图案，使得参考光束通过物镜的更多内部，或者扩大 参考光束图案，使得参考光束根据温度通过物镜的更外部部分。

公开(公告)号：US08134765B2

公开(公告)日：2012-03-13

申请号：US11683249

申请日：2007-03-07

申请人： Mitsuru Toishi ,  Tomiji Tanaka ,  Atsushi Fukumoto ,  Kenjiro Watanabe

发明人： Mitsuru Toishi ,  Tomiji Tanaka ,  Atsushi Fukumoto ,  Kenjiro Watanabe

IPC分类号： G03H1/22

CPC分类号： G11B7/0065 ,  G03H1/12 ,  G11B7/00781 ,  G11B7/0938 ,  G11B7/126 ,  G11B7/128 ,  G11B7/1378 ,  G11B2007/13727

摘要： A hologram recording and reconstruction apparatus records and reconstructs a hologram in a recording layer of a holographic recording medium using a signal light beam and a reference light beam. The apparatus includes an objective lens, a spatial light modulator on which a reference light beam pattern for generating a reference light beam is displayed, a temperature sensor for detecting the temperature of the holographic recording medium, and a control unit for controlling the spatial light modulator to reduce a reference light beam pattern so that the reference light beam passes through the more inner portion of the objective lens or enlarge the reference light beam pattern so that the reference light beam passes through the more outer portion of the objective lens in accordance with the temperature.

摘要翻译： 全息记录和重建装置使用信号光束和参考光束在全息记录介质的记录层中记录和重构全息图。 该装置包括物镜，空间光调制器，其上显示用于产生参考光束的参考光束图案，用于检测全息记录介质的温度的温度传感器，以及用于控制空间光调制器的控制单元 以减小参考光束图案，使得参考光束通过物镜的更多内部部分或放大参考光束图案，使得参考光束根据物镜透过物镜的更外部部分 温度。

公开(公告)号：US20060232841A1

公开(公告)日：2006-10-19

申请号：US11388473

申请日：2006-03-24

申请人： Mitsuru Toishi ,  Tomiji Tanaka ,  Mikio Sugiki

发明人： Mitsuru Toishi ,  Tomiji Tanaka ,  Mikio Sugiki

IPC分类号： G03H1/28

CPC分类号： G11B7/0065 ,  G11B7/00781 ,  G11B7/126

摘要： A holographic recording and reconstructing apparatus includes a light source having a variable oscillation wavelength; a temperature sensing unit operable to sense temperature; and a control unit operable to record information about a temperature sensed by the temperature sensing unit on a holographic recording medium during recording, to obtain the information about the temperature from the holographic recording medium and obtain a temperature sensed by the temperature sensing unit during reconstruction, to determine the amount of wavelength shift to counteract the effects of a change in the dimension of the holographic recording medium between recording and reconstruction based on the difference between the temperatures, and to shift the oscillation wavelength of the light source by the determined amount.

公开(公告)号：US20090316239A1

公开(公告)日：2009-12-24

申请号：US12475098

申请日：2009-05-29

申请人： Hitoshi OKADA ,  Masaaki Hara ,  Satoru Seko ,  Tomiji Tanaka ,  Yoshiki Okamoto

发明人： Hitoshi OKADA ,  Masaaki Hara ,  Satoru Seko ,  Tomiji Tanaka ,  Yoshiki Okamoto

IPC分类号： G03H1/08

CPC分类号： G11B7/00781 ,  G11B7/0065

摘要： A recording apparatus includes a drive unit that rotationally drives a holographic recording medium including a recording layer and a track forming layer that includes guide tracks formed at constant intervals in a radial direction, where a signal beam and a reference beam are emitted to the recording layer so that a hologram is recorded in accordance with the signal beam, a signal beam generating unit, a reference beam generating unit, a recording unit that emits the signal beam and reference beam into the medium and records the hologram, a rotation control unit that controls the drive unit so that the medium is rotationally driven at a constant rotation speed, and a recording control unit that selects some of the guide tracks so that radial-direction recording intervals of the holograms are statistically decreased towards the outer periphery and controls the recording unit to record the holograms along the selected tracks.

摘要翻译： 记录装置包括：驱动单元，其旋转地驱动包括记录层的全息记录介质和轨道形成层，该轨道形成层包括沿径向恒定间隔形成的导轨，其中信号光束和参考光束被发射到记录层 使得根据信号束记录全息图，信号光束产生单元，参考光束产生单元，将信号光束和参考光束发射到介质中并记录全息图的记录单元，控制旋转控制单元 所述驱动单元使得所述介质以恒定的旋转速度被旋转地驱动;以及记录控制单元，其选择一些所述导轨，使得所述全息图的径向记录间隔向外周界统计地减小，并且控制所述记录单元 沿所选轨道记录全息图。

公开(公告)号：US20080198432A1

公开(公告)日：2008-08-21

申请号：US12032536

申请日：2008-02-15

申请人： Tomiji Tanaka ,  Masaaki Hara ,  Kazutatsu Tokuyama ,  Satoru Seko ,  Shinji Yamada ,  Hitoshi Okada

发明人： Tomiji Tanaka ,  Masaaki Hara ,  Kazutatsu Tokuyama ,  Satoru Seko ,  Shinji Yamada ,  Hitoshi Okada

IPC分类号： G03H1/22 ,  G02F1/137

CPC分类号： G11B7/1362 ,  G03H1/22 ,  G03H1/265 ,  G03H2001/0441 ,  G03H2210/562 ,  G11B7/0065 ,  G11B7/1369

摘要： A hologram reproducing apparatus includes a first reference light path leading laser light from a laser light source so that a hologram recording medium is irradiated with first reference light; a diffracted light path leading diffracted light, generated from the hologram recording medium by irradiation with the first reference light, to a light receiving element having a plurality of pixels; and a second reference light path leading second reference light, having the same polarization direction as that of the diffracted light, from the laser light source to the light receiving element. The second reference light path is provided with a phase modulating element so that the phase difference between the diffracted light and the second reference light in a light receiving surface of the light receiving element is adjusted within a predetermined range.

摘要翻译： 全息图再现装置包括：第一参考光路，其引导来自激光光源的激光，使得全息图记录介质用第一参考光照射; 通过照射第一参考光从全息图记录介质产生的衍射光的衍射光路到具有多个像素的光接收元件; 以及第二参考光路，其将具有与衍射光的偏振方向相同的偏振方向的第二参考光从激光光源引导到光接收元件。 第二参考光路设置有相位调制元件，使得光接收元件的光接收表面中的衍射光和第二参考光之间的相位差被调节在预定范围内。

公开(公告)号：US08416480B2

公开(公告)日：2013-04-09

申请号：US12032536

申请日：2008-02-15

申请人： Tomiji Tanaka ,  Masaaki Hara ,  Kazutatsu Tokuyama ,  Satoru Seko ,  Shinji Yamada ,  Hitoshi Okada

发明人： Tomiji Tanaka ,  Masaaki Hara ,  Kazutatsu Tokuyama ,  Satoru Seko ,  Shinji Yamada ,  Hitoshi Okada

IPC分类号： G03H1/26 ,  G03H1/10

CPC分类号： G11B7/1362 ,  G03H1/22 ,  G03H1/265 ,  G03H2001/0441 ,  G03H2210/562 ,  G11B7/0065 ,  G11B7/1369

摘要： A hologram reproducing apparatus includes a first reference light path leading laser light from a laser light source so that a hologram recording medium is irradiated with first reference light; a diffracted light path leading diffracted light, generated from the hologram recording medium by irradiation with the first reference light, to a light receiving element having a plurality of pixels; and a second reference light path leading second reference light, having the same polarization direction as that of the diffracted light, from the laser light source to the light receiving element. The second reference light path is provided with a phase modulating element so that the phase difference between the diffracted light and the second reference light in a light receiving surface of the light receiving element is adjusted within a predetermined range.

摘要翻译： 全息图再现装置包括：第一参考光路，其引导来自激光光源的激光，使得全息图记录介质用第一参考光照射; 通过照射第一参考光从全息图记录介质产生的衍射光的衍射光路到具有多个像素的光接收元件; 以及第二参考光路，其将具有与衍射光的偏振方向相同的偏振方向的第二参考光从激光光源引导到光接收元件。 第二参考光路设置有相位调制元件，使得光接收元件的光接收表面中的衍射光和第二参考光之间的相位差被调节在预定范围内。

公开(公告)号：US08194517B2

公开(公告)日：2012-06-05

申请号：US13170623

申请日：2011-06-28

申请人： Hitoshi Okada ,  Tomiji Tanaka ,  Takahiro Takeda

发明人： Hitoshi Okada ,  Tomiji Tanaka ,  Takahiro Takeda

IPC分类号： G11B11/00

CPC分类号： G11B7/1275 ,  G03H1/2286 ,  G03H1/26 ,  G03H2001/0212 ,  G03H2240/51 ,  G03H2240/52 ,  G03H2240/53 ,  G11B7/083 ,  G11B7/08564 ,  G11B7/0938 ,  G11B7/1263 ,  G11B7/1267

摘要： A hologram recording and reproducing device controls an optical beam output from an external cavity semiconductor laser to improve a diffraction efficiency. The hologram recording and reproducing device includes an external cavity laser, a photodiode, a laser drive circuit and a laser diode controller. The external cavity laser has a laser diode adapted to emit an optical beam that is used to generate data light and reference light with which a hologram recording medium is irradiated. The photodiode detects the amount of the optical beam output from the external cavity laser. The laser drive circuit supplies a current to the external cavity laser. The laser diode controller controls the laser drive circuit to ensure that a value obtained by integrating the detected intensity of the optical beam with respect to time over a predetermined period is equal to predetermined recording energy.

摘要翻译： 全息记录和再现装置控制从外腔半导体激光器输出的光束以提高衍射效率。 全息记录和再现装置包括外腔激光器，光电二极管，激光驱动电路和激光二极管控制器。 外腔激光器具有适于发射光束的激光二极管，该光束用于产生照射全息图记录介质的数据光和参考光。 光电二极管检测从外腔激光器输出的光束的量。 激光驱动电路向外腔激光器提供电流。 激光二极管控制器控制激光驱动电路，以确保通过将检测到的光束的强度相对于预定时间段的时间积分获得的值等于预定的记录能量。

公开(公告)号：US07969846B2

公开(公告)日：2011-06-28

申请号：US12509674

申请日：2009-07-27

申请人： Hitoshi Okada ,  Tomiji Tanaka ,  Takahiro Takeda

发明人： Hitoshi Okada ,  Tomiji Tanaka ,  Takahiro Takeda

IPC分类号： G11B11/00

CPC分类号： G11B7/1275 ,  G03H1/2286 ,  G03H1/26 ,  G03H2001/0212 ,  G03H2240/51 ,  G03H2240/52 ,  G03H2240/53 ,  G11B7/083 ,  G11B7/08564 ,  G11B7/0938 ,  G11B7/1263 ,  G11B7/1267

摘要： A hologram recording and reproducing device controls an optical beam output from an external cavity semiconductor laser to improve a diffraction efficiency. The hologram recording and reproducing device includes an external cavity laser, a photodiode, a laser drive circuit and a laser diode controller. The external cavity laser has a laser diode adapted to emit an optical beam that is used to generate data light and reference light with which a hologram recording medium is irradiated. The photodiode detects the amount of the optical beam output from the external cavity laser. The laser drive circuit supplies a current to the external cavity laser. The laser diode controller controls the laser drive circuit to ensure that a value obtained by integrating the detected intensity of the optical beam with respect to time over a predetermined period is equal to predetermined recording energy.

摘要翻译： 全息记录和再现装置控制从外腔半导体激光器输出的光束以提高衍射效率。 全息记录和再现装置包括外腔激光器，光电二极管，激光驱动电路和激光二极管控制器。 外腔激光器具有适于发射光束的激光二极管，该光束用于产生照射全息图记录介质的数据光和参考光。 光电二极管检测从外腔激光器输出的光束的量。 激光驱动电路向外腔激光器提供电流。 激光二极管控制器控制激光驱动电路，以确保通过将检测到的光束的强度相对于预定时间段的时间积分获得的值等于预定的记录能量。