Optical data storage by selective localized alteration of a format hologram
    1.
    发明授权
    Optical data storage by selective localized alteration of a format hologram 失效
    光学数据存储通过选择性地局部改变格式全息图

    公开(公告)号:US06212148B1

    公开(公告)日:2001-04-03

    申请号:US09016382

    申请日:1998-01-30

    IPC分类号: G11B700

    摘要: Digital data bits are stored at storage locations at plural depths within a holographic storage medium as selective, localized alterations in a format hologram. Micro-localized regions of a reflection format hologram extending throughout the medium are deleted by focusing a high-power laser beam at desired storage locations. The deletion regions have a lower reflectivity than the surrounding parts of the format hologram. Tunable-focus storage and retrieval heads, as well as dynamic aberration compensators, are used for multi-depth access. Storage and retrieval may each be achieved with a single head.

    摘要翻译: 数字数据位存储在全息存储介质内的多个深度的存储位置处,作为格式全息图中的选择性,局部变化。 通过将高功率激光束聚焦在期望的存储位置,删除延伸穿过介质的反射格式全息图的微定位区域。 删除区域具有比格式全息图的周围部分更低的反射率。 可调焦点存储和检索头以及动态像差补偿器用于多深度访问。 存储和检索可以单独实现。

    Optical data storage by selective localized alteration of a format hologram in a holographic storage disk
    2.
    发明授权
    Optical data storage by selective localized alteration of a format hologram in a holographic storage disk 失效
    通过全息存储盘中的格式全息图的选择性局部改变来进行光学数据存储

    公开(公告)号:US06614741B1

    公开(公告)日:2003-09-02

    申请号:US09192165

    申请日:1998-11-13

    IPC分类号: G11B700

    摘要: Digital data bits are stored at storage locations at plural depths within a holographic medium of a holographic storage disk in the form of selective, localized alterations in a format hologram. Micro-localized regions of a reflection format hologram extending throughout the medium are deleted by focusing a high-power laser beam at desired storage locations. The deletion regions have a lower reflectivity than the surrounding parts of the format hologram. Tunable-focus storage and retrieval heads, as well as dynamic aberration compensators, are used for multi-depth access. Storage and retrieval may each be achieved with a single head.

    摘要翻译: 数字数据位以格式全息图的选择性,局部改变的形式存储在全息存储盘的全息介质内的多个深度的存储位置处。 通过将高功率激光束聚焦在期望的存储位置,删除延伸穿过介质的反射格式全息图的微定位区域。 删除区域具有比格式全息图的周围部分更低的反射率。 可调焦点存储和检索头以及动态像差补偿器用于多深度访问。 存储和检索可以单独实现。

    Polarization-dependent retroreflection mirror device

    公开(公告)号:US06545805B2

    公开(公告)日:2003-04-08

    申请号:US09855569

    申请日:2001-05-16

    IPC分类号: G02B530

    CPC分类号: G02B27/28 G02B5/12

    摘要: Conventional retroreflection mirrors in the form of right angle prisms are quite sensitive to beam position and beam angle errors. Manufacturing and assembly tolerances are also a cause of concern in conventional devices. Accordingly, the present invention solves these aforementioned problems by providing a retroreflection device comprising: a beam director, preferably in the form of a Wollaston prism; a polarization rotator, preferably in the form of a quarter wave plate; and a flat reflective surface, such as a plane mirror. The device of the present invention is far less sensitive to beam angle alignment and is completely independent of the beam position. The present invention is particularly useful as a beam splitter for directing orthogonally polarized beams of light back along parallel paths in an interleaver apparatus.

    Focus error signal generation using a birefringent lens with confocal detection
    6.
    发明授权
    Focus error signal generation using a birefringent lens with confocal detection 有权
    使用共聚焦检测的双折射透镜产生聚焦误差信号

    公开(公告)号:US06269057B1

    公开(公告)日:2001-07-31

    申请号:US09229138

    申请日:1999-01-12

    IPC分类号: G11B700

    摘要: An improved focus error signal generator device including two optical lenses in series; a birefringent optical lens followed by a standard optical lens, the lenses being disposed in the path of a return read beam wherein the birefringent optical lens has a first and second focal plane. A pinhole is disposed in the path of the return read beam in close proximity to the first and second focal planes. A polarizing beam splitter is positioned after the second focal plane and serves to split the return read beam into two light beams of polarization associated with the first and second focal planes. First and second detectors are positioned so as to read the two light beams signals output from the polarizing beam splitter and the detectors are connected to an electrical differencing circuit having an output to an optical head servo system.

    摘要翻译: 一种改进的聚焦误差信号发生器装置,包括串联的两个光学透镜; 双折射光学透镜后面是标准光学透镜,透镜设置在返回读取光束的路径中,其中双折射光学透镜具有第一和第二焦平面。 针孔布置在返回读取光束的路径中,紧邻第一和第二焦平面。 偏振分束器位于第二焦平面之后,用于将返回读取光束分成与第一和第二焦平面相关联的两个偏振光束。 定位第一和第二检测器以便读取从偏振分束器输出的两个光束信号,并且检测器连接到具有到光学头伺服系统的输出的电差分电路。

    System and method for correcting sampling errors associated with radiation source tuning rate fluctuations in swept-wavelength interferometry
    7.
    发明授权
    System and method for correcting sampling errors associated with radiation source tuning rate fluctuations in swept-wavelength interferometry 失效
    用于校正与扫描波长干涉测量中的辐射源调谐速率波动相关的采样误差的系统和方法

    公开(公告)号:US08392138B2

    公开(公告)日:2013-03-05

    申请号:US12537003

    申请日:2009-08-06

    IPC分类号: G01B9/02 G06F19/00

    摘要: The frequency-sampling method is widely used to accommodate nonlinear electromagnetic source tuning in swept-wavelength interferometric techniques, such as optical frequency domain reflectometry (OFDR) and swept-wavelength optical coherence tomography (OCT). Two sources of sampling errors are associated with the frequency-sampling method. One source of error is the limit of an underlying approximation for long interferometer path mismatches and fast electromagnetic source tuning rates. A second source of error is transmission delays in data acquisition hardware. Aspects of the invention relate to a method and system for correcting sampling errors in swept-wavelength interferometry systems such that the two error sources correct sampling errors associated with the first radiation path and the second radiation path cancel to second order.

    摘要翻译: 频率采样方法被广泛用于适应扫描波长干涉技术中的非线性电磁源调谐,如光频域反射测量(OFDR)和扫描波长光学相干断层扫描(OCT)。 采样误差的两个来源与频率采样方法相关。 误差的一个来源是长干涉仪路径不匹配和快速电磁源调谐速率的底层近似的极限。 第二个错误来源是数据采集硬件中的传输延迟。 本发明的方面涉及用于校正扫频波长干涉测量系统中的采样误差的方法和系统,使得两个误差源校正与第一辐射路径相关联的采样误差和第二辐射路径取消到二阶。

    SYSTEM AND METHOD FOR CORRECTING SAMPLING ERRORS ASSOCIATED WITH RADIATION SOURCE TUNING RATE FLUCTUATIONS IN SWEPT-WAVELENGTH INTERFEROMETRY
    8.
    发明申请
    SYSTEM AND METHOD FOR CORRECTING SAMPLING ERRORS ASSOCIATED WITH RADIATION SOURCE TUNING RATE FLUCTUATIONS IN SWEPT-WAVELENGTH INTERFEROMETRY 失效
    用于校正与SWEPT-WAVELENGTH INTERFEROMETRY中的辐射源调谐速率波动相关的采样误差的系统和方法

    公开(公告)号:US20100145648A1

    公开(公告)日:2010-06-10

    申请号:US12537003

    申请日:2009-08-06

    IPC分类号: G01B9/02 G01R35/00 G06F19/00

    摘要: The frequency-sampling method is widely used to accommodate nonlinear electromagnetic source tuning in swept-wavelength interferometric techniques, such as optical frequency domain reflectometry (OFDR) and swept-wavelength optical coherence tomography (OCT). Two sources of sampling errors are associated with the frequency-sampling method. One source of error is the limit of an underlying approximation for long interferometer path mismatches and fast electromagnetic source tuning rates. A second source of error is transmission delays in data acquisition hardware. Aspects of the invention relate to a method and system for correcting to sampling errors in swept-wavelength interferometry systems such that the two error sources correct sampling errors associated with the first radiation path and the second radiation path cancel to second order.

    摘要翻译: 频率采样方法被广泛用于适应扫描波长干涉技术中的非线性电磁源调谐,如光频域反射测量(OFDR)和扫描波长光学相干断层扫描(OCT)。 采样误差的两个来源与频率采样方法相关。 误差的一个来源是长干涉仪路径不匹配和快速电磁源调谐速率的底层近似的极限。 第二个错误来源是数据采集硬件中的传输延迟。 本发明的方面涉及用于校正扫频波长干涉测量系统中的采样误差的方法和系统,使得两个误差源校正与第一辐射路径相关联的采样误差和第二辐射路径抵消到二阶。

    Monolithic waveguide arrays
    9.
    发明授权
    Monolithic waveguide arrays 有权
    单片波导阵列

    公开(公告)号:US07212723B2

    公开(公告)日:2007-05-01

    申请号:US11357737

    申请日:2006-02-16

    IPC分类号: G02B6/00

    CPC分类号: G02B6/13 G02B6/138

    摘要: A waveguide array is fabricated by providing a photoreactive material and generating an optical intensity pattern corresponding to a geometry of the waveguide array. A relative translation of the photoreactive material is effected through the optical intensity pattern. Thereafter, the photoreactive material is rendered substantially unreactive to light at at least a wavelength of the optical intensity pattern.

    摘要翻译: 通过提供光反应材料并产生对应于波导阵列的几何形状的光强度图案来制造波导阵列。 通过光强度图案实现光反应性材料的相对平移。 此后,使光反应性材料在光强度图案的至少一个波长处基本上不反应光。