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1. 发明授权

US06535472B1 Hologram recording apparatus and method therefor 失效
标题翻译：全息记录装置及其方法
公开(公告)号：US06535472B1
公开(公告)日：2003-03-18
申请号：US09631646
申请日：2000-08-02
申请人： Myeongkyu Lee , Kenji Kitamura , Yasunori Furukawa , Shunji Takekawa , Hideki Hatano
发明人： Myeongkyu Lee , Kenji Kitamura , Yasunori Furukawa , Shunji Takekawa , Hideki Hatano
IPC分类号： G11B700
CPC分类号： G11B7/1275 , G03H2001/026 , G03H2001/0268 , G11B7/0025 , G11B7/0065 , G11B7/243 , G11B2007/0009 , G11B2007/24306 , G11B2007/2432
摘要： A hologram recording apparatus is capable of directing interferable signal light and reference light into a hologram recording medium to record an information signal carried by the signal light. The hologram recording medium is sensitive to a first light at a first wavelength in an ultraviolet or short-wavelength visible light band to develop light induced absorption. The apparatus includes a light source for irradiating the hologram recording medium with the first light, and a laser light source for irradiating the hologram recording medium with signal light and reference light at a second wavelength longer than the first wavelength after the first light is irradiated.
摘要翻译：全息记录装置能够将干涉信号光和参考光引导到全息图记录介质中，以记录由信号光携带的信息信号。全息图记录介质对紫外或短波长可见光波段中的第一波长的第一光敏感，以产生光吸收。该装置包括用于照射第一光的全息图记录介质的光源和用于在第一光照射之后以比第一波长长的第二波长的信号光和参考光照射全息图记录介质的激光光源。

2. 发明授权

US06373806B1 Two-color hologram recording/reproducing apparatus 失效
标题翻译：双色全息记录/再现装置
公开(公告)号：US06373806B1
公开(公告)日：2002-04-16
申请号：US09630763
申请日：2000-08-02
申请人： Kenji Kitamura , Yasunori Furukawa , Shunji Takekawa , Myeongkyu Lee , Satoru Tanaka , Takashi Yamaji , Hideki Hatano
发明人： Kenji Kitamura , Yasunori Furukawa , Shunji Takekawa , Myeongkyu Lee , Satoru Tanaka , Takashi Yamaji , Hideki Hatano
IPC分类号： G11B700
CPC分类号： G11B7/0025 , G03H2001/026 , G03H2001/0268 , G11B7/0065 , G11C13/042
摘要： A two-color hologram recording/reproducing apparatus is capable of directing interferable signal light and reference light into a hologram recording medium to record an information signal carried by the signal light. The hologram recording medium is sensitive to a first light at a first wavelength in an ultraviolet or short-wavelength visible light band to develop light induced absorption. The apparatus includes a light source for irradiating the hologram recording medium with the first light, a laser light source for irradiating the hologram recording medium with signal light and reference light at a second wavelength longer than the first wavelength after the first light is irradiated, and a gate light source for directing gate light at a third wavelength into the hologram recording medium. The gate light causes the hologram recording medium to develop a recording sensitivity to activate or inactivate a refractive index grating in accordance with existence or non-existence of a light interference pattern formed by the signal light and the reference light.
摘要翻译：双色全息记录/再现装置能够将干涉信号光和参考光引导到全息图记录介质中，以记录由信号光携带的信息信号。全息图记录介质对紫外或短波长可见光波段中的第一波长的第一光敏感，以产生光吸收。该装置包括用于照射第一光的全息图记录介质的光源，用于在第一光照射之后以比第一波长长的第二波长的信号光和参考光照射全息图记录介质的激光光源，以及用于将第三波长的栅极光引导到全息图记录介质中的栅极光源。栅极光使得全息图记录介质产生记录灵敏度，以根据由信号光和参考光形成的光干涉图案的存在或不存在来激活或失活折射率光栅。

3. 发明授权

US06670079B1 Photorefractive material 失效
$Photorefractive material$
标题翻译：光折射材料
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。

4. 发明授权

US06473208B1 Two-color holographic recording apparatus 失效
标题翻译：双色全息记录装置
公开(公告)号：US06473208B1
公开(公告)日：2002-10-29
申请号：US09598382
申请日：2000-06-21
申请人： Myeongkyu Lee , Kenji Kitamura , Yasunori Furukawa , Shunji Takekawa , Yoshihisa Ito , Hideki Hatano , Satoru Tanaka
发明人： Myeongkyu Lee , Kenji Kitamura , Yasunori Furukawa , Shunji Takekawa , Yoshihisa Ito , Hideki Hatano , Satoru Tanaka
IPC分类号： G03H103
CPC分类号： G03H1/0248 , G03H2001/026 , G03H2001/0268 , G11B7/0065
摘要： A two-color holographic recording apparatus reduces error signals possibly included in reproduced digital data signals. The two-color holographic recording apparatus has first, second and third light shutters for passing or blocking gate light, signal light and reference light incident on a recording medium respectively, and a controller for controlling the respective states of the first, second and third light shutters.
摘要翻译：双色全息记录装置减少可能包含在再现的数字数据信号中的误差信号。双色全息记录装置具有分别用于通过或阻挡入射在记录介质上的栅极光，信号光和参考光的第一，第二和第三光闸，以及用于控制第一，第二和第三光的各自状态的控制器百叶窗。

5. 发明授权

US06856433B2 Holographic recording medium and holographic recording/reproducing apparatus using the same 失效
标题翻译：全息记录介质和全息记录/再现装置
公开(公告)号：US06856433B2
公开(公告)日：2005-02-15
申请号：US10656879
申请日：2003-09-08
申请人： Hideki Hatano , Takashi Yamaji , Kenji Kitamura , Shunji Takekawa , Masaru Nakamura
发明人： Hideki Hatano , Takashi Yamaji , Kenji Kitamura , Shunji Takekawa , Masaru Nakamura
IPC分类号： G03H1/02 , G03H1/26 , G06K19/06 , G11B7/0065
CPC分类号： G03H1/02 , G03H2001/0491 , G03H2260/54 , G11B7/0065
摘要： A holographic recording medium exhibiting a high recording sensitivity without execution of reduction treatment. A system records information on the holographic recording medium by using a gating light within a wavelength band causing less optical damage to the holographic recording medium. The holographic recording medium includes a single crystal of lithium niobate (LiNbO3) or lithium tantalate (LiTaO3) containing Mn as a dopant.
摘要翻译：具有高记录灵敏度的全息记录介质，而不执行还原处理。系统通过使用波长带内的门控光对全息记录介质造成更少的光学损伤来在全息记录介质上记录信息。全息记录介质包括含有Mn作为掺杂剂的铌酸锂（LiNbO 3）或钽酸锂（LiTaO 3）的单晶。

6. 发明授权

US06747787B2 Optically functional device, single crystal substrate for the device and method for its use 有权
标题翻译：光功能器件，单晶衬底的器件及其使用方法
公开(公告)号：US06747787B2
公开(公告)日：2004-06-08
申请号：US09797596
申请日：2001-03-05
申请人： Yasunori Furukawa , Kenji Kitamura , Shunji Takekawa , Masaru Nakamura
发明人： Yasunori Furukawa , Kenji Kitamura , Shunji Takekawa , Masaru Nakamura
IPC分类号： G02F1355
CPC分类号： G02F1/0027 , G02F1/292 , G02F1/3534 , G02F1/3558 , G02F1/3775 , G02F1/39 , G02F2202/20
摘要： An optically functional device comprising a ferroelectric single crystal substrate and polarization-inverted structures formed at portions of the substrate at a temperature of not higher than the Curie temperature by an electron beam scanning irradiation method or a voltage application method and designed to control light passed through the polarization-inverted portions, wherein a LiNbO3 crystal having a molar ratio of Li/Nb within a range of from 0.95 to 1.01, is used as the substrate, so that the propagation loss of light passed through the polarization-inverted portions immediately after formation of the polarization-inverted structures, is not more than 2%.
摘要翻译：一种光功能元件，其特征在于，具有强电介质单晶基板和通过电子束扫描照射法或电压施加方法在不高于居里温度的温度下在基板的部分形成的偏振反转结构，并设计成控制通过的光使用其中Li / Nb的摩尔比在0.95〜1.01的范围内的LiNbO 3晶体作为基板，使得在形成之后立即通过偏振反转部分的光的传播损耗为偏振反转部分的极化反转结构不大于2％。

7. 发明授权

US06673330B1 Single crystal of lithium niobate or tantalate and its optical element, and process and apparatus for producing an oxide single crystal 有权
标题翻译：铌酸锂或钽酸锂的单晶及其光学元件，以及用于生产氧化物单晶的工艺和设备
公开(公告)号：US06673330B1
公开(公告)日：2004-01-06
申请号：US09521899
申请日：2000-03-09
申请人： Kenji Kitamura , Yasunori Furukawa , Shunji Takekawa , Shigeyuki Kimura
发明人： Kenji Kitamura , Yasunori Furukawa , Shunji Takekawa , Shigeyuki Kimura
IPC分类号： C01D1500
CPC分类号： C30B15/12 , C30B15/00 , C30B29/30 , Y10T117/10
摘要： A single crystal of lithium niobate or lithium tantalate may be grown from a melt of a composition having a molar excess of Li compared to a melt having the stoichiometric amount of lithium, and having a molar fraction of Li2O/(Nb2O5+Li2O) or Li2O/(Ta2O5+Li2O) within a range of at least 0.490 and less than 0.500. The single crystal also has at least one element selected from the group consisting of Mg, Zn, Sc and In, in an amount of from 0.1 to 3.0 mol % based on the total amount of the elements, Nb and Li, or the total amount of the elements, Ta and Li.
摘要翻译：铌酸锂或钽酸锂的单晶可以从具有摩尔过量的Li的组合物的熔体与具有化学计量的锂的熔体相比生长，并且具有Li 2 O /（Nb 2 O 5 + Li 2 O）或Li 2 O的摩尔分数 /（Ta2O5 + Li2O）在0.490以上且小于0.500的范围内。单晶还具有选自Mg，Zn，Sc和In中的至少一种元素，相对于元素的总量，Nb和Li为0.1〜3.0摩尔％，或者总量的元素，Ta和Li。

8. 发明授权

US06464777B2 Single crystal of lithium niobate or tantalate and its optical element, and process and apparatus for producing an oxide single crystal 有权
标题翻译：铌酸锂或钽酸锂的单晶及其光学元件，以及用于生产氧化物单晶的工艺和设备
公开(公告)号：US06464777B2
公开(公告)日：2002-10-15
申请号：US09754187
申请日：2001-01-05
申请人： Kenji Kitamura , Yasunori Furukawa , Shunji Takekawa , Shigeyuki Kimura
发明人： Kenji Kitamura , Yasunori Furukawa , Shunji Takekawa , Shigeyuki Kimura
IPC分类号： C30B1500
CPC分类号： C30B15/12 , C30B15/00 , C30B29/30 , Y10T117/10
摘要： A stoichiometric single crystal of lithium niobate or lithium tantalate is produced by pulling a single crystal of lithium niobate or lithium tantalate having a molar fraction of Li2O/(Nb2O5+Li2O) or Li2O/ (Ta2O5+Li2O) of at least 0.490 and less than 0.500, from a melt of a composition having a molar excess of Li over a stoichiometric composition of lithium niobate or lithium tantalate. The single crystal has 0.1 to 3 mol % of at least one element selected from the group consisting of Mg, Zn, Sc and In based on a total amount of elements Nb and Li, or a total amount of elements Ta and Li. The single crystal has substantially no absorption in the visible light region.
摘要翻译：铌酸锂或钽酸锂的化学计量单晶通过将具有至少0.490摩尔分数的Li 2 O /（Nb 2 O 5 + Li 2 O）或Li 2 O /（Ta 2 O 5 + Li 2 O）的摩尔分数的铌酸锂或钽酸锂的单晶拉伸并且小于 0.500，来自具有摩尔过量的Li的组合物的熔体，其化学计量组成为铌酸锂或钽酸锂。基于元素Nb和Li的总量或元素Ta和Li的总量，单晶具有选自Mg，Zn，Sc和In中的至少一种元素的0.1至3mol％。单晶在可见光区域基本上没有吸收。

9. 发明授权

US06624923B2 Optically functional device, single crystal substrate for the device and method for its use 有权
公开(公告)号：US06624923B2
公开(公告)日：2003-09-23
申请号：US09796594
申请日：2001-03-02
申请人： Yasunori Furukawa , Kenji Kitamura , Shunji Takekawa , Masaru Nakamura
发明人： Yasunori Furukawa , Kenji Kitamura , Shunji Takekawa , Masaru Nakamura
IPC分类号： G02F1355
CPC分类号： G02F1/3558 , G02F1/3775 , G02F2202/20
摘要： An optically functional device comprising a ferroelectric single crystal substrate and polarization-inverted structures formed at portions of the substrate at a temperature of not higher than the Curie temperature by an electron beam scanning irradiation method or a voltage application method and designed to control light passed through the polarization-inverted portions, wherein a LiTaO3 crystal having a molar ratio of Li/Ta within a range of from 0.95 to 1.02, is used as the substrate, so that the propagation loss of light passed through the polarization-inverted portions immediately after formation of the polarization-inverted structures, is not more than 2%.

10. 发明授权

US07446930B2 Method of inverting polarization by controlling defect density or degree of order of lattice points 有权
标题翻译：通过控制缺陷密度或者点阵次序来反转极化的方法
公开(公告)号：US07446930B2
公开(公告)日：2008-11-04
申请号：US10575271
申请日：2004-11-10
申请人： Kenji Kitamura , Sunao Kurimura , Masaru Nakamura , Shunji Takekawa , Kazuya Terabe , Shunichi Hishida , Tamaki Shimura
发明人： Kenji Kitamura , Sunao Kurimura , Masaru Nakamura , Shunji Takekawa , Kazuya Terabe , Shunichi Hishida , Tamaki Shimura
IPC分类号： G02F1/35 , G02F2/02
CPC分类号： G02F1/3558 , G02F2202/20
摘要： A problem to be solved is to provide a method of forming domain inverted regions of short period in a ferroelectric single crystal in a controllable time period of application of voltage and an optical wavelength conversion element using the same.A solving means of it solves the problem by forming (i) a control layer having a larger defect density Dcont1 than the defect density Dferro of a ferroelectric single crystal (Dferro
摘要翻译：要解决的问题是提供一种在施加电压的可控时间内在铁电单晶中形成短周期的畴反转区域的方法和使用其的光波长转换元件。其解决方法通过形成（i）具有比铁电单晶（D）的缺陷密度D 更大的缺陷密度D 的控制层来解决该问题或者形成（ii）具有比铁电单晶的格点的次序小的点阵次数的控制层，垂直于铁电单晶中的铁电单晶的偏振方向的面。

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