Apparatus and methods for threshold control of photopolymerization for holographic data storage using at least two wavelengths
    1.
    发明申请
    Apparatus and methods for threshold control of photopolymerization for holographic data storage using at least two wavelengths 审中-公开
    用于使用至少两个波长的全息数据存储的光聚合阈值控制的装置和方法

    公开(公告)号:US20090202919A1

    公开(公告)日:2009-08-13

    申请号:US12288843

    申请日:2008-10-23

    IPC分类号: G03F7/00

    摘要: A polymerizable media, including holographic recording media, and methods of use of the same. The media comprises at least one monomer or oligomer which undergoes polymerization to form a polymer; a compound, which absorbs actinic radiation of a first wavelength and forms a sensitizer which absorbs actinic radiation of a second wavelength; and an initiator, which, in combination with the sensitizer, initiates polymerization of the at least one monomer or oligomer when said sensitizer is exposed to actinic radiation of the second wavelength.

    摘要翻译: 包括全息记录介质的可聚合介质及其使用方法。 介质包含至少一种经历聚合以形成聚合物的单体或低聚物; 其吸收第一波长的光化辐射并形成吸收第二波长的光化辐射的敏化剂; 以及引发剂,当所述敏化剂暴露于第二波长的光化辐射时,其与敏化剂组合引发至少一种单体或低聚物的聚合。

    Method of recording and reading angle-multiplexed holograms that compensates for media shrinkage
    2.
    发明申请
    Method of recording and reading angle-multiplexed holograms that compensates for media shrinkage 审中-公开
    记录和读取补偿介质收缩的角度多路复用全息图的方法

    公开(公告)号:US20090046337A1

    公开(公告)日:2009-02-19

    申请号:US12218766

    申请日:2008-07-17

    申请人: David A. Waldman

    发明人: David A. Waldman

    IPC分类号: G03H1/28

    摘要: A method of recording a plurality of holographic images in a holographic media, comprising recording a sequence of multiplexed holograms in a selected storage location in the holographic recording media, each hologram having a respective interbeam angle. The interbeam angle increases for each subsequently recorded hologram to compensate for a variable shrinkage of the holographic media during recording. The multiplexed holograms recorded at the selected storage location are partially or fully overlapped. During reading the recorded holograms, a reference beam is directed at a selected storage location in the holographic recording media at a sequence of incidence angles, each incidence angle being adjusted by a respective adjustment angle. The adjustment angles can be substantially equal.

    摘要翻译: 一种在全息介质中记录多个全息图像的方法,包括在全息记录介质中的选定的存储位置中记录复用的全息图序列,每个全息图具有相应的光束间角度。 每个随后记录的全息图的间束角增加,以补偿记录期间全息介质的可变收缩。 记录在选择的存储位置的多路复用全息图部分地或完全重叠。 在读取所记录的全息图期间,参考光束以入射角顺序被引导到全息记录介质中的选定的存储位置,每个入射角由相应的调整角度调节。 调节角度可以基本相等。

    Acquisition of High Resolution Biometric Images
    3.
    发明申请
    Acquisition of High Resolution Biometric Images 有权
    获取高分辨率生物特征图像

    公开(公告)号:US20080123908A1

    公开(公告)日:2008-05-29

    申请号:US10561646

    申请日:2004-06-21

    IPC分类号: G06K9/00 G09G3/32

    CPC分类号: G06K9/00046

    摘要: An apparatus for image acquisition of topological features of the surface of skin. The apparatus comprises a waveguide, having an entrance edge and top and bottom surfaces; a light source, configured to direct a light beam at the entrance edge of the waveguide; a skin contact layer, disposed at or near the top surface of the waveguides; a holographic optical element (HOE), disposed at the top or at the bottom surfaces of the waveguide, configured to diffract the light beam incident from the light source to the skin contact layer; a sensor array, configured to detect light reflected from the surface of skin in contact with skin contact layer; and means for compensating for changes in the Bragg matching condition of the HOE due to temperature.

    摘要翻译: 用于图像获取皮肤表面的拓扑特征的装置。 该装置包括具有入口边缘和顶表面和底表面的波导; 光源,被配置为将光束引导到波导的入口边缘; 皮肤接触层,设置在波导的顶表面处或附近; 设置在波导的顶部或底表面处的全息光学元件(HOE),被配置为将从光源入射的光束衍射到皮肤接触层; 传感器阵列,被配置为检测从与皮肤接触层接触的皮肤表面反射的光; 以及用于补偿由于温度导致的HOE的布拉格匹配条件变化的装置。

    Methods And Apparatus For The Fixing Of Holographic Media In Holographic Data Storage Systems
    4.
    发明申请
    Methods And Apparatus For The Fixing Of Holographic Media In Holographic Data Storage Systems 审中-公开
    全息数据存储系统中全息介质固定的方法和装置

    公开(公告)号:US20080037397A1

    公开(公告)日:2008-02-14

    申请号:US10582264

    申请日:2004-12-10

    IPC分类号: G11B7/00

    摘要: Holographic data storage systems are fixed after exposure during which data in the form of holograms are stored at locations in the medium (4). Sufficient fixing energy in the form of light or other electromagnetic and thermal radiation is applied to the media (4) either by flooding the media, or to specific locations where the medium has been written. The energy is sufficient to expose the recorded medium (4) to prevent recording in the unused dynamic range thereof. Such recording can be a spurious recording made during readout or from spurious sources of light incident on the media. In one embodiment, the reference beam (108) produced in the course of holographic recording is redirected to locations on the media (4) which have already been recorded. The redirected beam post exposes the media to fix these locations against spurious recording. The integrity of the holographic data storage systems and the robustness thereof is improved by fixing methods and apparatus incorporating the invention.

    摘要翻译: 全息数据存储系统在曝光之后是固定的,在此期间以全息图形式的数据存储在介质(4)中的位置处。 以光或其他电磁辐射和热辐射的形式将足够的固定能量通过淹没介质或介质已被写入的特定位置施加到介质(4)。 能量足以暴露记录介质(4)以防止在其未使用的动态范围内记录。 这种记录可以是在读出期间进行的杂散记录或者是入射在介质上的杂散光源。 在一个实施例中,在全息记录过程中产生的参考光束(108)被重定向到已经被记录在介质(4)上的位置。 重定向的光束柱曝光媒体以固定这些位置以防杂散记录。 全息数据存储系统的完整性及其鲁棒性通过固定包含本发明的方法和设备得以改善。

    Acquisition of high resolution biometric images
    8.
    发明授权
    Acquisition of high resolution biometric images 有权
    获取高分辨率生物识别图像

    公开(公告)号:US07728959B2

    公开(公告)日:2010-06-01

    申请号:US10561646

    申请日:2004-06-21

    IPC分类号: G06K9/74

    CPC分类号: G06K9/00046

    摘要: An apparatus for image acquisition of topological features of the surface of skin. The apparatus comprises a waveguide, having an entrance edge and top and bottom surfaces; a light source, configured to direct a light beam at the entrance edge of the waveguide; a skin contact layer, disposed at or near the top surface of the waveguides; a holographic optical element (HOE), disposed at the top or at the bottom surfaces of the waveguide, configured to diffract the light beam incident from the light source to the skin contact layer; a sensor array, configured to detect light reflected from the surface of skin in contact with skin contact layer; and means for compensating for changes in the Bragg matching condition of the HOE due to temperature.

    摘要翻译: 用于图像获取皮肤表面的拓扑特征的装置。 该装置包括具有入口边缘和顶表面和底表面的波导; 光源,被配置为将光束引导到波导的入口边缘; 皮肤接触层,设置在波导的顶表面处或附近; 设置在波导的顶部或底表面处的全息光学元件(HOE),被配置为将从光源入射的光束衍射到皮肤接触层; 传感器阵列,被配置为检测从与皮肤接触层接触的皮肤表面反射的光; 以及用于补偿由于温度导致的HOE的布拉格匹配条件变化的装置。

    Method and apparatus for phase-encoded homogenized Fourier transform holographic data storage and recovery
    10.
    发明授权
    Method and apparatus for phase-encoded homogenized Fourier transform holographic data storage and recovery 失效
    用于相位编码的均匀傅里叶变换全息数据存储和恢复的方法和装置

    公开(公告)号:US07652809B2

    公开(公告)日:2010-01-26

    申请号:US12217755

    申请日:2008-07-08

    IPC分类号: G03H1/16

    摘要: An apparatus for writing and reading holograms, comprising a spatial light modulator (SLM) operable in phase mode, having a plurality of pixels for generating an object beam that overlaps with a reference beam; a holographic recording medium (HRM) in the path of the object beam; and a first lens element disposed in the path of the object beam between the SLM and the HRM; wherein the HRM is disposed at or near the Fourier transform plane of the first lens element.

    摘要翻译: 一种用于写入和读取全息图的装置,包括可在相位模式下操作的空间光调制器(SLM),具有用于产生与参考光束重叠的物体光束的多个像素; 在物体光束的路径中的全息记录介质(HRM); 以及设置在所述物体光束在所述SLM和所述HRM之间的路径中的第一透镜元件; 其中所述HRM设置在所述第一透镜元件的傅里叶变换平面处或附近。