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：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：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：US06301028B1

公开(公告)日：2001-10-09

申请号：US09533763

申请日：2000-03-23

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

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

IPC分类号： G03H126

CPC分类号： G03H1/265 ,  G03H1/26 ,  G03H2001/026 ,  G03H2001/0268 ,  G03H2223/12 ,  G11B7/0025 ,  G11B7/0065

摘要： A description is provided of an optical information recording and reproducing apparatus employing a holographic memory. The apparatus includes a mask disposed in an optical path of the signal light beam so as to cover a light intensity distribution of the signal light beam incident into the holographic memory at nearly a half portion thereof with respect to the center of the distribution of the zeroth-order diffracted light of the signal light beam. The center of a region of the holographic memory where the signal light beam and the reference light beam intersect with each other, is shifted by a distance substantially equal to twice the distance between peaks of the zeroth-order diffracted light or the first-order diffracted light of the signal light beam.

摘要翻译： 提供了使用全息存储器的光学信息记录和再现装置的描述。 该装置包括设置在信号光束的光路中的掩模，以便覆盖入射到全息存储器中的相对于零分布的中心的近半部分的信号光束的光强度分布 信号光束的衍射光。 信号光束和参考光束彼此相交的全息存储器的区域的中心偏移大致等于零级衍射光或第一级衍射光的峰值之间的距离的两倍 信号光束的光。

公开(公告)号：US5009490A

公开(公告)日：1991-04-23

申请号：US363825

申请日：1989-06-09

申请人： Tomomitsu Kouno ,  Hideki Hatano ,  Takashi Yamaji ,  Sakashi Ootaki ,  Masami Nishida

发明人： Tomomitsu Kouno ,  Hideki Hatano ,  Takashi Yamaji ,  Sakashi Ootaki ,  Masami Nishida

IPC分类号： G02F1/1335 ,  G02F1/13357 ,  G02F1/135

CPC分类号： G02F1/135

摘要： A photo-conductive liquid crystal display in which the liquid crystal light valve and the electroluminescence element are disposed integrally with each other. The photo-conductive liquid crystal light valve is arranged such that a pair of transparent electrodes are disposed on the outside of a lamination of a photo-conductive layer and a liquid crystal layer, and an electroluminescence element is disposed on the outside of the transparent electrode which is disposed on the writing side of the device.

摘要翻译： 其中液晶光阀和电致发光元件彼此一体地设置的光导液晶显示器。 导光性液晶光阀配置成在透明电极层和液晶层的层叠体的外侧配置一对透明电极，在透明电极的外侧配置电致发光元件 其设置在装置的书写侧。

公开(公告)号：US06670079B1

公开(公告)日：2003-12-30

申请号：US09598222

申请日：2000-06-21

申请人： Kenji Kitamura ,  Yasunori Furukawa ,  Shunji Takekawa ,  Myeongkyu Lee ,  Hideki Hatano ,  Satoru Tanaka ,  Takashi Yamaji

发明人： Kenji Kitamura ,  Yasunori Furukawa ,  Shunji Takekawa ,  Myeongkyu Lee ,  Hideki Hatano ,  Satoru Tanaka ,  Takashi Yamaji

IPC分类号： G03H103

CPC分类号： G11C13/045 ,  G03H2260/54

摘要： A photorefractive material provides a high photosensitivity without reduction. The material comprises a single crystal of terbium (Tb)-doped niobate or tantalate. The single crystal is a single crystal of lithium niobate (LiNbO3) whose molar fraction of [Li2O]/([Li2O]+[Nb2O5]) lies in a range of 0.482 to 0.505, or a single crystal of lithium tantalate (LiTaO3) whose molar fraction of [Li2O]/([Li2O]+[Ta2O5]) lies in a range of 0.482 to 0.505. The amount of terbium added in the photorefractive material ranges from 10 weight ppm to 1000 weight ppm.

摘要翻译： 光折射材料提供高的光敏性而不会减少。 该材料包括铽（Tb）掺杂的铌酸盐或钽酸盐的单晶。 该单晶是其[Li 2 O] /（[Li 2 O] + [Nb 2 O 5]）的摩尔分数在0.482〜0.505的范围内的铌酸锂（LiNbO 3）的单晶，或者是钽酸锂（LiTaO 3）的单晶， [Li 2 O] /（[Li 2 O] + [Ta 2 O 5]）的摩尔分数在0.482〜0.505的范围内。 在光折射材料中添加的铽的量为10重量ppm至1000重量ppm。