公开(公告)号：US20100060960A1

公开(公告)日：2010-03-11

申请号：US12538318

申请日：2009-08-10

申请人： Kenji Tanaka ,  Koji Takasaki ,  Kazutatsu Tokuyama ,  Atsushi Fukumoto ,  Hidenori Mori ,  Yoshiki Okamoto

发明人： Kenji Tanaka ,  Koji Takasaki ,  Kazutatsu Tokuyama ,  Atsushi Fukumoto ,  Hidenori Mori ,  Yoshiki Okamoto

IPC分类号： G03H1/12 ,  G03H1/22 ,  G03H1/14

CPC分类号： G03H1/22 ,  G03H1/2286 ,  G03H2240/52 ,  G11B7/0065 ,  G11B7/128 ,  G11B7/1395

摘要： A reproduction device includes a light-emitting unit that emits reference light and coherent light, which is generated so as to have uniform light intensity and uniform phase, onto a hologram recording medium on which data is recorded by an interference pattern of signal light and the reference light, and a light-attenuating unit that attenuates the light intensity of the coherent light.

摘要翻译： 一种再现装置包括发射单元，其发射参考光和相干光，其被产生以具有均匀的光强度和均匀相位到其上通过信号光的干涉图案记录数据的全息图记录介质上，并且 以及衰减相干光的光强度的光衰减单元。

公开(公告)号：US20100265808A1

公开(公告)日：2010-10-21

申请号：US12731306

申请日：2010-03-25

申请人： Akio YAMAKAWA ,  Yoshiki Okamoto ,  Kenji Tanaka ,  Kazutatsu Tokuyama ,  Koji Takasaki

发明人： Akio YAMAKAWA ,  Yoshiki Okamoto ,  Kenji Tanaka ,  Kazutatsu Tokuyama ,  Koji Takasaki

IPC分类号： G11B7/00

CPC分类号： G11B7/0956 ,  G11B7/0065 ,  G11B7/083

摘要： A hologram device includes: a light source for applying light to a hologram recording medium having a recording layer in which information recording is performed by interference fringes between signal light and reference light; a spatial modulation unit that generates the signal light and/or the reference light and generates a marker light in a predetermined position within an incident surface of the light from the light source by performing spatial light modulation on the light from the light source; a light applying unit that applies the light subjected to spatial light modulation by the spatial light modulation unit to the hologram recording medium via an objective lens; a light receiving unit that receives the light applied via the objective lens through the hologram recording medium; and a tilt detection unit that obtains a tilt error signal representing an error from an ideal angle of a tilt angle as an incident angle of the applied light via the objective lens to an information recording surface of the hologram recording medium based on a result of detection of an error between an ideal light reception position of the marker light in the light receiving unit and a real light reception position of the marker light by the light receiving unit.

摘要翻译： 全息装置包括：光源，用于向具有记录层的全息记录介质施加光，其中通过信号光与参考光之间的干涉条纹执行信息记录; 空间调制单元，通过对来自光源的光进行空间光调制，生成信号光和/或参考光，并通过对来自光源的光的入射表面中的预定位置产生标记光; 照射单元，经由物镜将经空间光调制单元经空间光调制的光施加到全息图记录介质上; 光接收单元，其接收通过所述全息图记录介质经由所述物镜施加的光; 以及倾斜检测单元，其基于检测结果，从倾斜角的理想角度获得表示误差的倾斜误差信号作为经由物镜的所施加的光的入射角到全息图记录介质的信息记录表面 在光接收单元中的标记光的理想光接收位置与由光接收单元的标记光的实际光接收位置之间的误差。

公开(公告)号：US08432591B2

公开(公告)日：2013-04-30

申请号：US12704587

申请日：2010-02-12

申请人： Akio Yamakawa ,  Yoshiki Okamoto ,  Kenji Tanaka ,  Kazutatsu Tokuyama ,  Koji Takasaki

发明人： Akio Yamakawa ,  Yoshiki Okamoto ,  Kenji Tanaka ,  Kazutatsu Tokuyama ,  Koji Takasaki

IPC分类号： G03H1/04

CPC分类号： G11B7/1275 ,  G11B7/00781 ,  G11B7/083 ,  G11B7/0908 ,  G11B7/128 ,  G11B7/1374 ,  G11B7/1378 ,  G11B7/24038 ,  G11B7/24044

摘要： A light irradiation device includes: a focus servo control unit including a light source, a spatial light modulating unit, and a light irradiating unit, for focus servo control so that the ideal focal position of light via an objective lens is such that distance between an ideal focal position and a hologram recording medium surface is smaller than distance from the surface to the lower layer side face of the recording layer, and the focal position of light via the objective lens is constant at the ideal focal position; an objective-lens/relay-lens distance adjusting unit to adjust distance between the objective lens and a relay lens close to the objective lens; a light reception unit to receive marker light; and a constant distance control unit to control the objective-lens/relay-lens distance adjusting unit based on error between the ideal position of the marker light, and the actual position of the marker light.

摘要翻译： 光照射装置包括：聚焦伺服控制单元，包括光源，空间光调制单元和光照射单元，用于聚焦伺服控制，使得经由物镜的光的理想焦点位置使得 理想焦点位置和全息图记录介质表面小于记录层的表面到下层侧面的距离，并且通过物镜的光的焦点位置在理想焦点位置处是恒定的; 物镜/中继透镜距离调节单元，用于调整物镜与靠近物镜的中继透镜之间的距离; 光接收单元，用于接收标记光; 以及恒定距离控制单元，其基于标记光的理想位置与标记光的实际位置之间的误差来控制物镜/中继透镜距离调节单元。

公开(公告)号：US08121010B2

公开(公告)日：2012-02-21

申请号：US12731306

申请日：2010-03-25

申请人： Akio Yamakawa ,  Yoshiki Okamoto ,  Kenji Tanaka ,  Kazutatsu Tokuyama ,  Koji Takasaki

发明人： Akio Yamakawa ,  Yoshiki Okamoto ,  Kenji Tanaka ,  Kazutatsu Tokuyama ,  Koji Takasaki

IPC分类号： G11B7/00

CPC分类号： G11B7/0956 ,  G11B7/0065 ,  G11B7/083

摘要： A hologram device includes: a light source for applying light to a hologram recording medium having a recording layer in which information recording is performed by interference fringes between signal light and reference light; a spatial modulation unit that generates the signal light and/or the reference light and generates a marker light in a predetermined position within an incident surface of the light from the light source by performing spatial light modulation on the light from the light source; a light applying unit that applies the light subjected to spatial light modulation by the spatial light modulation unit to the hologram recording medium via an objective lens; a light receiving unit that receives the light applied via the objective lens through the hologram recording medium; and a tilt detection unit that obtains a tilt error signal representing an error from an ideal angle of a tilt angle as an incident angle of the applied light via the objective lens to an information recording surface of the hologram recording medium based on a result of detection of an error between an ideal light reception position of the marker light in the light receiving unit and a real light reception position of the marker light by the light receiving unit.

摘要翻译： 全息装置包括：光源，用于向具有记录层的全息记录介质施加光，其中通过信号光与参考光之间的干涉条纹执行信息记录; 空间调制单元，通过对来自光源的光进行空间光调制，生成信号光和/或参考光，并通过对来自光源的光的入射表面中的预定位置产生标记光; 照射单元，经由物镜将经空间光调制单元经空间光调制的光施加到全息图记录介质上; 光接收单元，其接收通过所述全息图记录介质经由所述物镜施加的光; 以及倾斜检测单元，其基于检测结果，从倾斜角的理想角度获得表示误差的倾斜误差信号作为经由物镜的所施加的光的入射角到全息图记录介质的信息记录表面 在光接收单元中的标记光的理想光接收位置与由光接收单元的标记光的实际光接收位置之间的误差。

公开(公告)号：US20090290471A1

公开(公告)日：2009-11-26

申请号：US12429883

申请日：2009-04-24

申请人： Kenji TANAKA ,  Atsushi Fukumoto ,  Masaaki Hara ,  Kazutatsu Tokuyama

发明人： Kenji TANAKA ,  Atsushi Fukumoto ,  Masaaki Hara ,  Kazutatsu Tokuyama

IPC分类号： G11B7/00

CPC分类号： G11B7/1369 ,  G11B7/0065 ,  G11B7/128 ,  G11B7/1381 ,  G11B7/1392

摘要： A recording and reproducing device performs recording and reproduction on a hologram recording medium on which data is recorded by the use of interference fringes formed by signal light and reference light. The device includes: a light generation device including a spatial light modulator which performs spatial light modulation on incident light, and generating the signal and reference lights in the recording and the reference light in the reproduction; an image sensor for receiving the incident light and obtaining a light reception signal; an optical system for guiding the signal and reference lights to the hologram recording medium and reproduction light to the image sensor; and a band limiting device inserted on a Fourier plane in an optical path of the optical system, and having a transmittance set to be lower in a central area thereof than in a peripheral area thereof, to perform band limitation on the incident light.

摘要翻译： 记录和再现装置在通过使用由信号光和参考光形成的干涉条纹记录数据的全息图记录介质上执行记录和再现。 该装置包括：发光装置，其包括对入射光进行空间光调制的空间光调制器，并且在再现中产生记录中的信号和参考光; 用于接收入射光并获得光接收信号的图像传感器; 用于将信号和参考光引导到全息图记录介质并将光再现到图像传感器的光学系统; 以及插入光学系统的光路中的傅立叶平面上的带限制装置，并且在其中心区域具有比在其周边区域更低的透射率，以对入射光进行带限制。

公开(公告)号：US20080144147A1

公开(公告)日：2008-06-19

申请号：US11947637

申请日：2007-11-29

申请人： Masaaki Hara ,  Mikio Sugiki ,  Kazutatsu Tokuyama ,  Mitsuru Toishi ,  Kenji Tanaka ,  Kazuyuki Hirooka

发明人： Masaaki Hara ,  Mikio Sugiki ,  Kazutatsu Tokuyama ,  Mitsuru Toishi ,  Kenji Tanaka ,  Kazuyuki Hirooka

IPC分类号： G03H1/02 ,  G03H1/12 ,  G03H1/22

CPC分类号： G03H1/22 ,  G03H2001/0441 ,  G03H2210/562 ,  G03H2223/12 ,  G03H2223/13 ,  G11B7/0065 ,  G11B7/083 ,  G11B7/128 ,  G11B7/1369

摘要： In a reproducing apparatus adapted to reproduce data recorded on a holographic recording medium, a reference light generator generates reference light for illuminating the holographic recording medium, and a coherent light generator generates coherent light having an intensity greater than the absolute value of a minimum amplitude of a reproduced image and having a phase equal to the phase of the reproduced image. An image signal acquisition unit senses the reproduced image produced by illuminating the holographic recording medium with the reference light and the coherent light, and acquires an image signal based on the reproduced image. A square root calculation unit calculates the square root of each of values constituting the image signal. A removal unit removes the component of the coherent light from the calculated square root, whereby the data recorded on the holographic recording medium is correctly reproduced.

摘要翻译： 在适于再现记录在全息记录介质上的数据的再现装置中，参考光发生器产生用于照亮全息记录介质的参考光，并且相干光发生器产生具有大于最小幅度绝对值的强度的相干光 再现图像并且具有等于再现图像的相位的相位。 图像信号获取单元通过用参考光和相干光来感测通过照射全息记录介质产生的再现图像，并且基于再现的图像获取图像信号。 平方根计算单元计算构成图像信号的每个值的平方根。 去除单元从计算的平方根去除相干光的分量，由此记录在全息记录介质上的数据被正确地再现。

公开(公告)号：US07835049B2

公开(公告)日：2010-11-16

申请号：US11947637

申请日：2007-11-29

申请人： Masaaki Hara ,  Mikio Sugiki ,  Kazutatsu Tokuyama ,  Mitsuru Toishi ,  Kenji Tanaka ,  Kazuyuki Hirooka

发明人： Masaaki Hara ,  Mikio Sugiki ,  Kazutatsu Tokuyama ,  Mitsuru Toishi ,  Kenji Tanaka ,  Kazuyuki Hirooka

IPC分类号： G03H1/20

CPC分类号： G03H1/22 ,  G03H2001/0441 ,  G03H2210/562 ,  G03H2223/12 ,  G03H2223/13 ,  G11B7/0065 ,  G11B7/083 ,  G11B7/128 ,  G11B7/1369

摘要： In a reproducing apparatus adapted to reproduce data recorded on a holographic recording medium, a reference light generator generates reference light for illuminating the holographic recording medium, and a coherent light generator generates coherent light having an intensity greater than the absolute value of a minimum amplitude of a reproduced image and having a phase equal to the phase of the reproduced image. An image signal acquisition unit senses the reproduced image produced by illuminating the holographic recording medium with the reference light and the coherent light, and acquires an image signal based on the reproduced image. A square root calculation unit calculates the square root of each of values constituting the image signal. A removal unit removes the component of the coherent light from the calculated square root, whereby the data recorded on the holographic recording medium is correctly reproduced.

摘要翻译： 在适于再现记录在全息记录介质上的数据的再现装置中，参考光发生器产生用于照亮全息记录介质的参考光，并且相干光发生器产生具有大于最小幅度绝对值的强度的相干光 再现图像并且具有等于再现图像的相位的相位。 图像信号获取单元通过用参考光和相干光来感测通过照射全息记录介质产生的再现图像，并且基于再现的图像获取图像信号。 平方根计算单元计算构成图像信号的每个值的平方根。 去除单元从计算的平方根去除相干光的分量，由此记录在全息记录介质上的数据被正确地再现。

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：US07760611B2

公开(公告)日：2010-07-20

申请号：US11866866

申请日：2007-10-03

申请人： Mitsuru Toishi ,  Kazutatsu Tokuyama

发明人： Mitsuru Toishi ,  Kazutatsu Tokuyama

IPC分类号： G11B7/00

CPC分类号： G11B7/0065 ,  G11B7/00781

摘要： A hologram reproducing apparatus includes a reference-light spatial-light modulating section that displays a reference light pattern for generating reference light, an image sensor that has pixels arrayed two-dimensionally that receive diffractive light generated by irradiating the reference light on a hologram recording medium, and a control unit that processes an electric signal from the image sensor and reproduces recording data. The control unit detects a predetermined area electric signal, detects a hologram electric signal, subtracts the predetermined area electric signal from the hologram electric signal to obtain a reproduced signal after noise reduction, and reproduces the recording data from the reproduced signal after noise reduction.

摘要翻译： 一种全息图再现装置，包括：基准光空间光调制部，其显示用于产生参考光的基准光图案;图像传感器，其具有二维排列的像素，其接收通过在全息图记录介质上照射参考光而产生的衍射光 以及控制单元，其处理来自图像传感器的电信号并再现记录数据。 控制单元检测预定区域电信号，检测全息图电信号，从全息图电信号中减去预定区域电信号，以获得降噪后的再现信号，并且在降噪后再现来自再现信号的记录数据。

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。