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    • 3. 发明授权
    • Apparatus and method to store and retrieve information using an optical holographic data storage medium
    • 使用光学全息数据存储介质存储和检索信息的装置和方法
    • US07995444B2
    • 2011-08-09
    • US12030088
    • 2008-02-12
    • Allen Keith BatesDaniel James Winarski
    • Allen Keith BatesDaniel James Winarski
    • G11B7/00
    • G11B7/0065G11B7/00772G11B11/105
    • A method using an optical holographic data storage medium and an optical holographic data storage drive, comprising removeably disposing the optical holographic data storage medium in the optical holographic data storage drive, and determining whether to write information to the holographic data storage layer, and/or whether to read information from the holographic data storage layer, and/or whether to write information to the optical data storage layer, and/or whether to read information from the optical data storage layer. The optical holographic data storage medium comprises a holographic data storage layer and an optical data storage layer. The optical holographic data storage drive comprises a reflective spatial light modulator, a first lasing device, a first optical detector for detecting first laser light, a second lasing device, and a second optical detector for detecting second laser light.
    • 一种使用光学全息数据存储介质和光学全息数据存储驱动器的方法,包括将光学全息数据存储介质可移除地设置在光学全息数据存储驱动器中,以及确定是否向全息数据存储层写入信息,和/或 是否从全息数据存储层读取信息和/或是否向光学数据存储层写入信息和/或是否从光学数据存储层读取信息。 光学全息数据存储介质包括全息数据存储层和光学数据存储层。 光学全息数据存储驱动器包括反射空间光调制器,第一激光装置,用于检测第一激光的第一光学检测器,第二激光装置和用于检测第二激光的第二光学检测器。
    • 4. 发明授权
    • Magnetooptical recording method and apparatus using multi-layered media
    • 磁光记录方法和使用多层介质的设备
    • US5539709A
    • 1996-07-23
    • US92686
    • 1993-07-16
    • Masatoshi SatoJun SaitoHideki Akasaka
    • Masatoshi SatoJun SaitoHideki Akasaka
    • G11B11/105G11B11/00
    • G11B11/10586G11B11/105G11B11/10506G11B11/10519G11B11/10521
    • A magnetooptical recording method for recording data using a bit having upward-magnetization and a bit having downward-magnetization on a recording layer of a magnetooptical recording medium comprises the steps of using, as the medium, a multilayered magnetic recording medium consisting of a first layer having a perpendicular magnetic anisotropy acting as a recording layer, and a second layer having a perpendicular magnetic anisotropy acting as a reference layer; moving the medium; applying an initial field so that, before recording, the direction of magnetization of the recording layer is left unchanged, and that of the reference layer is aligned either upward or downward; radiating a laser beam onto the medium; pulse modulating an intensity of the laser beam in accordance with binary data to be recorded; when the laser beam is radiated, applying a bias field to the irradiated portion; and when the intensity of the pulse-modulated laser beam is at high level, forming one of the bit having upward-magnetization and that having downward-magnetization, and when the intensity of the pulse-modulated laser beam is at low level, forming the other bit.
    • 使用具有向上磁化的位和在磁光记录介质的记录层上具有向下磁化的位的数据记录数据的磁光记录方法包括以下步骤:使用由第一层构成的多层磁记录介质 具有作为记录层的垂直磁各向异性,和具有作为参考层的垂直磁各向异性的第二层; 移动媒体; 施加初始场,使得在记录之前,记录层的磁化方向保持不变,并且参考层的磁化方向向上或向下排列; 将激光束照射到介质上; 根据要记录的二进制数据对激光束的强度进行脉冲调制; 当激光束被照射时,向照射部分施加偏置场; 并且当脉冲调制激光束的强度处于高电平时,形成具有向上磁化并具有向下磁化的位之一,并且当脉冲调制激光束的强度处于低电平时,形成 其他位
    • 7. 发明授权
    • Focus adjusting apparatus for an optical pickup apparatus
    • 用于光学拾取装置的聚焦调整装置
    • US5200942A
    • 1993-04-06
    • US689282
    • 1991-07-30
    • Nobuhiko HosobataYukio YoshikawaMasaaki Takagi
    • Nobuhiko HosobataYukio YoshikawaMasaaki Takagi
    • G11B7/09G11B7/13G11B11/105
    • G11B11/10576G11B11/105G11B7/0912G11B7/093G11B7/0932G11B7/094G11B7/0943G11B7/13G11B7/133
    • On a focus adjusting apparatus of an optical pickup apparatus, light reflected by a recording medium is concentrated into two focuses by an optical divider. First and second optical detectors are disposed so that a focus adjusting mechanism is controlled in accordance with the output of both detectors. Each optical detector includes central and peripheral light receiving planes. In a first system, the focus adjusting mechanism is controlled so that a difference of a ratio of a quantity of received light of the central light receiving plane to the whole quantity of received light of both the central and peripheral light receiving planes of the first optical detector and the same ratio of the second optical detector is reduced to O. Even if unblance occurs in the quantities of incident light to both the optical detectors, the unbalanced component is canceled between a denominator and a numerator of the above noted ratio. In a second system, control is effected by the difference in the central quantities of received light of both optical detectors. The difference in the whole quantities of received light of both optical detectors is calculated and a correction value is calculated from the difference in the whole quantities of received light. Since the calculated correction value is subtracted from the calculated difference any unbalance in the quantity of incident light to both the optical detectors is removed.
    • PCT No.PCT / JP90 / 01325 Sec。 371日期1991年7月30日 102(e)1991年7月30日PCT PCT 1990年10月15日PCT公布。 出版物WO91 / 06097 日期:1991年5月2日。在光学拾取装置的聚焦调节装置中,由记录介质反射的光被分光器集中到两个聚焦中。 第一和第二光学检测器被设置成使得根据两个检测器的输出来控制聚焦调节机构。 每个光学检测器包括中央和周边光接收平面。 在第一系统中,焦点调节机构被控制成使得中央光接收面的接收光量与第一光学中心和周边光接收平面的接收光的总量的比率之差 检测器,并且第二光学检测器的相同比率减小到O.即使在两个光学检测器的入射光量中发生不均匀性,在分母和上述比例的分子之间抵消了不平衡分量。 在第二系统中,通过两个光学检测器的接收光的中心量的差异来实现控制。 计算两个光学检测器的接收光的总量的差异,并根据接收光的总量的差计算校正值。 由于从计算出的差值中减去计算出的校正值,所以去除了两个光学检测器的入射光量的不平衡。
    • 8. 发明授权
    • Optical data storage and retrieval apparatus
    • 光学数据存储和检索设备
    • US4727533A
    • 1988-02-23
    • US737932
    • 1985-05-28
    • Virgil Erbert
    • Virgil Erbert
    • G11B7/0033G11B7/0037G11B7/085G11B7/13G11B7/135G11B7/24G11B11/105G11B13/04G11B7/00
    • G11B11/105G11B11/10532G11B11/10556G11B11/10584G11B13/045G11B7/0033G11B7/0037G11B7/085G11B7/13G11B7/1374G11B7/24
    • An optical data storage system includes automatic compensation for shifting movements of the reading/writing beam and other imperfections which otherwise would affect the focusing or location of focus of a laser light beam onto a data storage record. Servo motors and associated apparatus common in the prior art are avoided. The recording or reading laser beam is directed as parallel light toward the data recording medium, but is first focused generally to a line by a first cylindrical lens supported by the laser source apparatus and transverse with respect to the orientation of data tracks of the data storage record. This produces a beam which is parallel in one direction as it approaches the data storage record. The beam is then focused substantially to a point by a second cylindrical lens perpendicular to the first lens and attached to and moveable with the data storage record as an integral part of a disk or card or other data storage structure. A series of such second cylindrical lenses are positioned side-by-side, with parallel longitudinal axes, on the data storage record. In this way, transverse relative movement of the laser beam with respect to the data tracks and the data record lenses and changes in the separation distance between the laser source and the data storage record, will not result in substantial defocusing or of a shift in the location of the beam focus point on the data record.
    • 光学数据存储系统包括用于移动读/写光束的移动的自动补偿和否则会影响激光束的焦点聚焦或定位到数据存储记录上的其他缺陷的自动补偿。 避免了现有技术中共同的伺服电动机和相关装置。 记录或读取激光束作为平行光朝向数据记录介质定向,但是首先通过由激光源设备支撑的第一柱面透镜并且横向于数据存储器的数据轨道的方位 记录。 这产生在接近数据存储记录时在一个方向上平行的光束。 然后,光束通过垂直于第一透镜的第二柱面透镜基本上聚焦到一个点,并且附接到数据存储记录并且作为盘或卡或其他数据存储结构的组成部分可移动。 一系列这样的第二柱面透镜在数据存储记录上并排并排设置有平行的纵向轴线。 以这种方式,激光束相对于数据轨道和数据记录透镜的横向相对运动以及激光源和数据存储记录之间的间隔距离的变化将不会导致实质上的散焦或在 光束对焦点的位置在数据记录上。