Photorefractive material
    24.
    发明授权
    Photorefractive material 失效
    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

    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。

    Volume holographic memory and optical information recording/reproducing apparatus
    25.
    发明授权
    Volume holographic memory and optical information recording/reproducing apparatus 失效
    体积全息存储器和光学信息记录/再现装置

    公开(公告)号:US06594220B1

    公开(公告)日:2003-07-15

    申请号:US09396663

    申请日:1999-09-15

    IPC分类号: G11B700

    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。

    Plated steel wire with corrosion resistance and excellent workability, and process for its manufacture
    26.
    发明授权
    Plated steel wire with corrosion resistance and excellent workability, and process for its manufacture 有权
    具有耐腐蚀性和优良加工性的镀钢丝及其制造工艺

    公开(公告)号:US06579615B1

    公开(公告)日:2003-06-17

    申请号:US09869115

    申请日:2001-07-24

    IPC分类号: B32B1501

    摘要: This invention provides a plated steel wire with high corrosion resistance and excellent workability, wherein the average composition of the plating alloy in the plated steel wire comprises, in terms of weight percentage, Al: 4-20%, Mg: 0.8-5%, and if necessary one or more from among Si: ≦2%, Na: 0.001-0.1% and Ti: 0.01-0.1%, with the remainder Zn, and an Fe—Zn alloy layer of no greater than 20 &mgr;m thickness is present at the plating-base metal interface; it is produced by coating a steel wire with a molten zinc plating composed mainly of zinc as the first stage and then.coating it with a molten zinc alloy plating with the aforementioned average composition as the second stage. The maximum plating bath immersion time is 20 seconds, and the part of the plated steel wire drawn out from the plating bath is purged with nitrogen gas.

    摘要翻译: 本发明提供一种耐腐蚀性高,加工性能优异的电镀钢丝,镀覆钢丝中的镀合金的平均组成按重量百分比计含有:Al:4-20%,Mg:0.8〜5% 并且如果需要,存在Si:<= 2%,Na:0.001-0.1%和Ti:0.01-0.1%中的一种或多种,​​剩余部分为Zn,并且存在不大于20μm厚度的Fe-Zn合金层 在电镀基底金属界面处; 通过以主要由锌组成的熔融锌镀层作为第一阶段涂覆钢丝,然后用上述平均组成的熔融锌合金镀层作为第二阶段来制造。 最大电镀浴浸渍时间为20秒,用氮气吹扫从电镀浴中拉出的电镀钢丝的一部分。

    Optical information recording and reproducing apparatus having volume holographic memory
    27.
    发明授权
    Optical information recording and reproducing apparatus having volume holographic memory 失效
    具有体积全息存储器的光学信息记录和再现装置

    公开(公告)号:US06490061B1

    公开(公告)日:2002-12-03

    申请号:US09540202

    申请日:2000-03-31

    IPC分类号: G03H126

    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。