公开(公告)号：US06414762B1

公开(公告)日：2002-07-02

申请号：US09651739

申请日：2000-03-23

申请人： Takashi Yamaji ,  Tomomitsu Kouno ,  Hideki Hatano ,  Yoshihisa Itoh ,  Satoru Tanaka ,  Hajime Matsushita

发明人： Takashi Yamaji ,  Tomomitsu Kouno ,  Hideki Hatano ,  Yoshihisa Itoh ,  Satoru Tanaka ,  Hajime Matsushita

IPC分类号： G03H102

CPC分类号： G11B7/0065 ,  G03H1/26 ,  G03H1/265 ,  G03H2001/026 ,  G03H2001/0268 ,  G11B7/0025

摘要： An optical information recording and reproducing apparatus, which detachably supports a holographic memory formed of a photorefractive crystal, includes a portion for supplying a coherent reference light beam at a first wavelength into the holographic memory; a portion for supplying a coherent signal light beam at the first wavelength, modulated in accordance with image data, into the memory to produce an optical interference pattern with the reference light within the memory; a portion for supplying a gate light beam at a second wavelength into the memory for activating or deactivating an index grating in accordance with the presence or absence of the optical interference pattern to enhance a photo-sensitivity of the memory; a detector for detecting diffraction light from the index grating of the memory by the irradiation of the reference light beam; and a portion for changing and regulating a light intensity of the gate light beam.

摘要翻译： 一种可拆卸地支撑由光折射晶体形成的全息存储器的光学信息记录和再现装置，包括用于将第一波长的相干参考光束提供给全息存储器的部分; 用于将根据图像数据调制的第一波长的相干信号光束提供到存储器中以产生与存储器内的参考光的光学干涉图案的部分; 用于根据存在或不存在光学干涉图案来将第二波长的栅极光束提供到存储器中以激活或去激活索引光栅的部分，以增强存储器的光敏性; 用于通过照射参考光束来检测来自存储器的索引光栅的衍射光的检测器; 以及用于改变和调节栅极光束的光强度的部分。

公开(公告)号：US06900914B1

公开(公告)日：2005-05-31

申请号：US09538149

申请日：2000-03-29

申请人： Satoru Tanaka ,  Tomomitsu Kouno ,  Hideki Hatano ,  Yoshihisa Itoh ,  Hajime Matsushita ,  Takashi Yamaji

发明人： Satoru Tanaka ,  Tomomitsu Kouno ,  Hideki Hatano ,  Yoshihisa Itoh ,  Hajime Matsushita ,  Takashi Yamaji

IPC分类号： G11B7/00 ,  G03H1/04 ,  G03H1/22 ,  G03H1/26 ,  G11B7/0025 ,  G11B7/0065 ,  G11B7/135 ,  G03H1/02

CPC分类号： G03H1/0248 ,  G03H1/26 ,  G03H1/265 ,  G03H2001/0268 ,  G11B7/0025 ,  G11B7/0065 ,  G11B7/135 ,  G11B2007/0009

摘要： A description is provided of an optical information recording and reproducing apparatus having a volume holographic memory. The apparatus is capable of recording an interference pattern in the volume holographic memory in high density and can be made small-sized. The apparatus includes a comprises support portion for detachably supporting the volume holographic memory, which is made of a photorefractive crystalline material; a reference beam supplying portion for making a coherent reference beam of a first wavelength incident on the volume holographic memory; a signal beam generating portion for making a coherent signal beam of the first wavelength, which is modulated in accordance with image data, incident on the volume holographic memory, intersecting therein the signal beam with the reference beam, and generating a three-dimensional light interference pattern of the signal beam and the reference beam; and detecting a portion for detecting diffracted light from a refractive index grid of the light interference pattern in the volume holographic memory, due to irradiation of the reference beam. The signal beam and the reference beam are arranged in a plane having a normal line perpendicular to the symmetrical axis of rotation of the volume holographic memory.

摘要翻译： 提供具有体积全息存储器的光学信息记录和再现装置的描述。 该装置能够以高密度在体积全息存储器中记录干涉图案，并且可以制成小尺寸。 该装置包括：包括用于可拆卸地支撑体积全息存储器的支撑部分，其由光折射晶体材料制成; 用于使第一波长的相干参考光束入射到体积全息存储器上的参考光束供应部分; 信号光束产生部分，用于使入射到体积全息存储器上的根据图像数据调制的第一波长的相干信号光束与信号光束与参考光束相交，并产生三维光干涉 信号光束和参考光束的图案; 并且由于参考光束的照射，检测用于检测来自体积全息存储器中的光干涉图案的折射率栅格的衍射光的部分。 信号光束和参考光束被布置在具有垂直于体积全息存储器的对称旋转轴线的法线的平面中。

公开(公告)号：US06594220B1

公开(公告)日：2003-07-15

申请号：US09396663

申请日：1999-09-15

申请人： Hajime Matsushita ,  Tomomitsu Kouno ,  Hideki Hatano ,  Yoshihisa Itoh ,  Satoru Tanaka ,  Takashi Yamaji ,  Fumitaka Kotaka

发明人： Hajime Matsushita ,  Tomomitsu Kouno ,  Hideki Hatano ,  Yoshihisa Itoh ,  Satoru Tanaka ,  Takashi Yamaji ,  Fumitaka Kotaka

IPC分类号： G11B700

CPC分类号： G11B7/1378 ,  G03H1/0248 ,  G03H1/265 ,  G03H2260/54 ,  G11B7/0025 ,  G11B7/0065 ,  G11B7/24

摘要： A volume holographic memory for recording three-dimensional distribution of interference fringes generated owing to interference between signal light and reference light is provided, wherein the volume holographic memory is formed into a cylindrical shape. Also an optical information recording/reproducing apparatus is provided which incorporates an interference-fringe generating unit for generating interference fringes formed owing to interference between signal light and reference light; a storage unit for storing three-dimensional distribution of the interference fringes generated by the interference-fringe generating unit; a detecting unit for detecting diffracted light obtainable from the storage unit by irradiating the storage unit with reference light; and a reproducing unit for reproducing signal light from diffracted light detected by the detecting unit, wherein the storage unit is constituted by a volume holographic memory having a cylindrical shape.

摘要翻译： 提供用于记录由信号光和参考光之间的干涉而产生的干涉条纹的三维分布的体积全息存储器，其中体积全息存储器形成为圆柱形。 还提供了一种光信息记录/再现装置，其包括干涉条纹产生单元，用于产生由于信号光和参考光之间的干扰而形成的干涉条纹; 存储单元，用于存储由干涉条纹生成单元生成的干涉条纹的三维分布; 检测单元，用于通过用参考光照射存储单元来检测从存储单元获得的衍射光; 以及再现单元，用于再现由检测单元检测到的衍射光的信号光，其中存储单元由具有圆柱形状的体积全息存储器构成。

公开(公告)号：US06490061B1

公开(公告)日：2002-12-03

申请号：US09540202

申请日：2000-03-31

申请人： Satoru Tanaka ,  Tomomitsu Kouno ,  Hideki Hatano ,  Yoshihisa Itoh ,  Hajime Matsushita ,  Takashi Yamaji

发明人： Satoru Tanaka ,  Tomomitsu Kouno ,  Hideki Hatano ,  Yoshihisa Itoh ,  Hajime Matsushita ,  Takashi Yamaji

IPC分类号： G03H126

CPC分类号： G11B7/0025 ,  G03H1/0248 ,  G03H1/26 ,  G03H1/265 ,  G03H2001/0232 ,  G03H2260/54 ,  G11B7/0065 ,  G11C13/042

摘要： A description is provided of an optical information recording and reproducing apparatus. The apparatus comprises: a holographic memory made of a photorefractive crystalline material; a support portion for detachably supporting the memory; a reference beam supplying portion for supplying a coherent reference beam of a first wavelength incident on the memory; a signal beam generating portion for supplying a coherent signal beam of the first wavelength, which is modulated in accordance with image data, incident on the memory, intersecting therein the signal beam with the reference beam, and generating a three-dimensional interference pattern of the beams; a detecting portion for detecting a diffracted light from a refractive index grating of the interference pattern in the memory, due to irradiation of the reference beam; and a medium position adjusting portion for moving a position of the support portion in accordance with a signal corresponding to positioning images from the detection portion. The memory includes a nonvolatile refractive index grating corresponding to a three-dimensional interference pattern of a coherent reference beam and a coherent signal beam, the coherent signal beam being modulated in accordance with positioning images.

摘要翻译： 提供了光学信息记录和再现装置的描述。 该装置包括：由光折射晶体材料制成的全息存储器; 用于可拆卸地支撑存储器的支撑部分; 参考光束供应部分，用于提供入射在存储器上的第一波长的相干参考光束; 信号光束产生部分，用于提供入射到存储器上的根据图像数据调制的第一波长的相干信号光束，信号光束与参考光束相交，并产生三维干涉图案 梁; 检测部，其由于参照光束的照射，检测来自存储器中的干涉图案的折射率光栅的衍射光; 以及介质位置调节部分，用于根据与来自检测部分的定位图像相对应的信号来移动支撑部分的位置。 存储器包括对应于相干参考光束和相干信号光束的三维干涉图案的非易失性折射率光栅，相干信号光束根据定位图像进行调制。

公开(公告)号：US06816291B2

公开(公告)日：2004-11-09

申请号：US10270494

申请日：2002-10-16

申请人： Satoru Tanaka ,  Tomomitsu Kouno ,  Hideki Hatano ,  Yoshihisa Itoh ,  Hajime Matsushita ,  Takashi Yamaji

发明人： Satoru Tanaka ,  Tomomitsu Kouno ,  Hideki Hatano ,  Yoshihisa Itoh ,  Hajime Matsushita ,  Takashi Yamaji

IPC分类号： G03H126

CPC分类号： G11B7/0025 ,  G03H1/0248 ,  G03H1/26 ,  G03H1/265 ,  G03H2001/0232 ,  G03H2260/54 ,  G11B7/0065 ,  G11C13/042

摘要： A description is provided of an optical information recording and reproducing apparatus. The apparatus comprises: a holographic memory made of a photorefractive crystalline material; a support portion for detachably supporting the memory; a reference beam supplying portion for supplying a coherent reference beam of a first wavelength incident on the memory; a signal beam generating portion for supplying a coherent signal beam of the first wavelength, which is modulated in accordance with image data, incident on the memory, intersecting therein the signal beam with the reference beam, and generating a three-dimensional interference pattern of the beams; a detecting portion for detecting a diffracted light from a refractive index grating of the interference pattern in the memory, due to irradiation of the reference beam; and a medium position adjusting portion for moving a position of the support portion in accordance with a signal corresponding to positioning images from the detection portion. The memory includes a nonvolatile refractive index grating corresponding to a three-dimensional interference pattern of a coherent reference beam and a coherent signal beam, the coherent signal beam being modulated in accordance with positioning images.

摘要翻译： 提供了光学信息记录和再现装置的描述。 该装置包括：由光折射晶体材料制成的全息存储器; 用于可拆卸地支撑存储器的支撑部分; 参考光束供应部分，用于提供入射在存储器上的第一波长的相干参考光束; 信号光束产生部分，用于提供入射到存储器上的根据图像数据调制的第一波长的相干信号光束，信号光束与参考光束相交，并产生三维干涉图案 梁; 检测部，其由于参照光束的照射，检测来自存储器中的干涉图案的折射率光栅的衍射光; 以及介质位置调节部分，用于根据与来自检测部分的定位图像相对应的信号来移动支撑部分的位置。 存储器包括对应于相干参考光束和相干信号光束的三维干涉图案的非易失性折射率光栅，相干信号光束根据定位图像进行调制。

公开(公告)号：US06574181B1

公开(公告)日：2003-06-03

申请号：US09535289

申请日：2000-03-24

申请人： Satoru Tanaka ,  Tomomitsu Kouno ,  Hideki Hatano ,  Yoshihisa Itoh ,  Hajime Matsushita ,  Takashi Yamaji

发明人： Satoru Tanaka ,  Tomomitsu Kouno ,  Hideki Hatano ,  Yoshihisa Itoh ,  Hajime Matsushita ,  Takashi Yamaji

IPC分类号： G11B700

CPC分类号： G11B7/0065 ,  G11B7/0025 ,  G11B7/24

摘要： Disclosed are a holographic memory medium for use in a holographic memory system, which can prevent generation of stray light of a gating beam at the time of recording information, and a recording apparatus which uses this memory medium. This memory medium records an information signal carried by a signal beam as a coherent reference beam and the signal beam enter the memory medium with a gating beam being present. The memory medium has at least a first surface and a second surface parallel to each other and comprises an antireflection coat, formed on the first surface, for preventing reflection of the gating beam. The recording apparatus records an information signal using a holographic memory medium and comprises a light absorbing member of absorbing the gating beam coming through the memory medium.

摘要翻译： 公开了一种用于全息存储系统的全息存储介质，其可以防止在记录信息时产生门控光束的杂散光，以及使用该存储介质的记录装置。 该存储介质将由信号束携带的信息信号记录为相干参考光束，并且信号光束进入具有门控光束的存储介质。 存储介质具有彼此平行的至少第一表面和第二表面，并且包括形成在第一表面上的防反射涂层，用于防止门控梁的反射。 记录装置使用全息存储介质记录信息信号，并且包括吸收通过存储介质的门控束的光吸收构件。

公开(公告)号：US06862120B2

公开(公告)日：2005-03-01

申请号：US10098616

申请日：2002-03-18

申请人： Satoru Tanaka ,  Hajime Matsushita ,  Yoshihisa Itoh ,  Tomomitsu Kouno ,  Hideki Hatano

发明人： Satoru Tanaka ,  Hajime Matsushita ,  Yoshihisa Itoh ,  Tomomitsu Kouno ,  Hideki Hatano

IPC分类号： G03H1/02 ,  G03H1/04 ,  G03H1/30 ,  G11B7/00 ,  G11B7/0065 ,  G11C13/04

CPC分类号： G11C13/042 ,  G03H1/02 ,  G03H1/0248 ,  G03H1/26 ,  G03H2001/0268 ,  G03H2001/0413 ,  G03H2001/183 ,  G03H2222/34 ,  G03H2222/56 ,  G03H2223/14 ,  G03H2260/54 ,  G11B7/0065 ,  G11B2007/0009

摘要： In a hologram recording method for forming a plurality of areas of a refractive index light interference pattern of a coherent signal light beam in accordance with information data within a recording medium having a shape of parallel flat plates, the signal light beam and the recording reference light beam cross each other within the recording medium, and a gate light beam having a second wavelength for revealing recording sensitivity of the recording medium is simultaneously irradiated to the recording medium so as to pass through a portion of the recording reference light beam and demarcate a volume smaller than that of this crossing portion.

摘要翻译： 在根据具有平行平板形状的记录介质内的信息数据形成相干信号光束的折射率光干涉图案的多个区域的全息图记录方法中，信号光束和记录参考光 光束在记录介质内彼此交叉，并且具有用于显示记录介质的记录灵敏度的第二波长的栅极光束被同时照射到记录介质上，以便通过记录参考光束的一部分并且划定体积 小于该交叉部分的面积。

公开(公告)号：US06320683B1

公开(公告)日：2001-11-20

申请号：US09538154

申请日：2000-03-29

申请人： Yoshihisa Ito ,  Tomomitsu Kouno ,  Hideki Hatano ,  Takashi Yamaji ,  Satoru Tanaka ,  Hajime Matsushita

发明人： Yoshihisa Ito ,  Tomomitsu Kouno ,  Hideki Hatano ,  Takashi Yamaji ,  Satoru Tanaka ,  Hajime Matsushita

IPC分类号： G03H126

CPC分类号： G11B7/08564 ,  G03H1/26 ,  G03H1/265 ,  G03H2001/026 ,  G03H2001/0268 ,  G11B7/0065

摘要： A description is provided of an optical information recording and reproducing apparatus which detachably supports a volume holographic memory formed of a photorefractive crystal. The apparatus includes a portion for supplying a coherent reference light beam at a first wavelength into the volume holographic memory; a portion for supplying a coherent signal light beam at the first wavelength, modulated in accordance with image data, into the memory to produce an optical interference pattern with the reference light within the memory; a portion for supplying a gate light beam at a second wavelength into the memory for activating or deactivating an index grating in accordance with the presence or absence of the optical interference pattern to enhances a photo-sensitivity of the memory; and a detector for detecting diffraction light from the index grating of the memory by the irradiation of the reference light beam. The apparatus includes a scanning portion for moving an intersecting region in which the gate light beam, the signal light beam and the reference light beam intersect with one another within the volume holographic memory along an optical axis of an optical path of the signal light beam within the volume holographic memory.

摘要翻译： 提供了可拆卸地支撑由光折射晶体形成的体积全息存储器的光学信息记录和再现装置的描述。 该装置包括用于将第一波长的相干参考光束提供到体积全息存储器中的部分; 用于将根据图像数据调制的第一波长的相干信号光束提供到存储器中以产生与存储器内的参考光的光学干涉图案的部分; 用于根据存在或不存在光学干涉图案来将第二波长的栅极光束提供到存储器中用于激活或去激活索引光栅的部分，以增强存储器的光敏性; 以及用于通过照射参考光束来检测来自存储器的索引光栅的衍射光的检测器。 该装置包括扫描部分，用于移动其中栅极光束，信号光束和参考光束沿着信号光束的光路的光轴在体积全息存储器内彼此相交的相交区域 体积全息记忆体。

公开(公告)号：US07023786B2

公开(公告)日：2006-04-04

申请号：US09978076

申请日：2001-10-17

申请人： Yoshihisa Itoh ,  Hajime Matsushita

发明人： Yoshihisa Itoh ,  Hajime Matsushita

IPC分类号： G11B7/00

CPC分类号： G11B7/083 ,  G03H1/16 ,  G03H1/181 ,  G03H1/22 ,  G03H1/2286 ,  G03H1/265 ,  G03H2001/026 ,  G03H2001/0268 ,  G03H2222/31 ,  G03H2222/56 ,  G11B7/0065 ,  G11B7/00772 ,  G11B7/1275 ,  G11B7/128 ,  G11B7/1395

摘要： A hologram recording and reproducing apparatus preforms to record data on a recording medium and reproduce data from the recording medium. The recording medium is made of a photorefractive crystal having a parallel plate shape. The apparatus includes: a support portion for detachably supporting and rotating the recording medium; a recording-reference-light-beam-supplying-portion for supplying a coherent recording reference light beam propagating along an optical axis to a major surface of the recording medium; a signal-light-beam-supplying-portion for supplying a coherent signal light beam which is modulated in accordance with image data, in an optical path into the recording medium such that the signal light beam intersects with the reference light beam to produce an optical interference pattern with the reference and signal light beams within the recording medium; a reproducing-reference-light-beam-supplying-portion for supplying into the recording medium a coherent reproducing reference light beam propagating in an opposite direction along the optical axis of the recording reference light beam to generate a phase conjugation wave from a refractive-index grating of the light interference pattern; a splitting portion for splitting the phase conjugation wave from the optical path of the signal light beam to image a dot pattern with the phase conjugation wave; a photo-detecting portion for detecting the dot pattern imaged with the phase conjugation wave to reproduce the image data.

公开(公告)号：US06504810B2

公开(公告)日：2003-01-07

申请号：US09749625

申请日：2000-12-28

申请人： Yoshihisa Itoh ,  Hajime Matsushita

发明人： Yoshihisa Itoh ,  Hajime Matsushita

IPC分类号： G11B700

CPC分类号： G11B7/0025 ,  G03H2001/0268 ,  G11B7/0065

摘要： An optical information recording/reproducing system includes a support member for removably supporting a volume holographic memory formed of a photorefractive crystal, and has a shape of a rotary member having a rotational symmetry axis, with plane surfaces perpendicular to the rotational symmetry axis formed at respective opposite ends thereof. The system also includes a reference beam-irradiating member for irradiating the volume holographic memory with a coherent reference beam having a first wavelength. The system also includes a signal beam-irradiating member for irradiating the volume holographic memory with a coherent signal beam which has the first wavelength and is modulated according to image data, to cause the signal beam to intersect with the reference beam within the volume holographic memory and thereby generate a refractive index grating of a three-dimensional optical interference pattern between the signal beam and the reference beam. The system also includes a member for detecting a diffracted light generated by irradiation of the reference beam on the refractive index grating of the optical interference pattern. The support member holds the volume holographic memory in a position allowing the signal beam to pass through the plane surfaces of the volume holographic memory at the respective opposite ends thereof.

摘要翻译： 一种光学信息记录/再现系统，包括一个用于可拆卸地支撑由光折变晶体形成的体积全息存储器的支撑构件，并具有旋转对象轴的旋转构件的形状，其平面垂直于形成在各自的旋转对称轴 的两端。 该系统还包括用于用具有第一波长的相干参考光束照射体积全息存储器的参考光束照射部件。 该系统还包括信号光束照射部件，用于用具有第一波长并根据图像数据调制的相干信号光束照射体积全息存储器，以使信号光束与体积全息存储器内的参考光束相交 从而在信号光束和参考光束之间产生三维光学干涉图案的折射率光栅。 该系统还包括用于检测由光学干涉图案的折射率光栅上的参考光束照射而产生的衍射光的部件。 支撑构件将体积全息存储器保持在允许信号光束在其各自相对端处通过体积全息存储器的平面的位置。