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    Methods for increasing transmission through scattering random media
    21.
    发明授权
    Methods for increasing transmission through scattering random media 有权
    通过散射随机介质增加透射的方法

    公开(公告)号：US09207171B2

    公开(公告)日：2015-12-08

    申请号：US14620411

    申请日：2015-02-12

    Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN

    Inventor： Raj R. Nadakuditi ,  Stephen C. Rand ,  Eric Michielssen ,  Curtis Jin

    IPC: G01N21/55 ,  G01N21/49 ,  G01N21/47

    CPC classification number: G01N21/49 ,  G01J9/00 ,  G01N2021/4709 ,  G01N2021/4735 ,  G02B26/06

    Abstract: The method, system, and computer-readable medium increase transmission of waves through a highly scattering random medium. Transmission is increased by iteratively refining wavefronts using measurements of the backscatter wavefronts resulting from transmission of waves into the medium. The process of double phase conjugation by time-reversing a wavefront, transmitting the time-reversed wavefront into the medium, and time-reversing the reversing backscatter wavefront is leveraged to implement the method in a physical system using a phase conjugate mirror. In an embodiment, transmission may be increased by phase-only modulation of the wavefronts. In an embodiment, the invention may be used to focus transmission through the medium to a location opposite the wave source.

    Abstract translation: 方法，系统和计算机可读介质通过高散射随机介质增加波的传输。 通过使用波形传播到介质中的后向散射波前的测量来迭代地精细化波前来增加传输。 通过时间反转波前，将时间反转的波前传输到介质中的时间反转和反向反向散射波前的双相位共轭的过程被用来在使用相位共轭镜的物理系统中实现该方法。 在一个实施例中，可以通过波前的相位仅调制来增加传输。 在一个实施例中，本发明可以用于将通过介质的传输聚焦到与波源相对的位置。

    MODAL DECOMPOSITION OF A LASER BEAM
    23.
    发明申请
    MODAL DECOMPOSITION OF A LASER BEAM 审中-公开
    激光束的模态分解

    公开(公告)号：US20150292941A1

    公开(公告)日：2015-10-15

    申请号：US14437794

    申请日：2013-10-24

    Applicant: CSIR

    Inventor： Andrew Forbes ,  Christian Schulze ,  Michael Rudolf Duparré ,  Sandile Ngcobo

    IPC: G01J1/42 ,  G01J9/00 ,  H01S3/00 ,  G01J1/04

    CPC classification number: G01J1/4257 ,  G01J1/0407 ,  G01J1/0411 ,  G01J1/0437 ,  G01J1/4228 ,  G01J9/00 ,  G01J2009/004 ,  H01S3/0014 ,  H01S3/005 ,  H01S3/08054 ,  H01S3/0815 ,  H01S3/09415

    Abstract: A method and apparatus for performing a modal decomposition of a laser beam are disclosed. The method includes the steps of performing a measurement to determine the second moment beam size (w) and beam propagation factor (M2) of the laser beam, and inferring the scale factor (wO) of the optimal basis set of the laser beam from the second moment beam size and the beam propagation factor, from the relationship: wO=w/M2. An optimal decomposition is performing using the scale factor wO to obtain an optimal mode set of adapted size. The apparatus includes a spatial light modulator arranged for complex amplitude modulation of an incident laser beam, and imaging means arranged to direct the incident laser beam onto the spatial light modulator. Fourier transforming lens is arranged to receive a laser beam reflected from the spatial light modulator. A detector is placed a distance of one focal length away from the Fourier transforming lens for monitoring a diffraction pattern of the laser beam reflected from the spatial light modulator and passing through the Fourier transforming lens. The apparatus performs an optical Fourier transform on the laser beam reflected from the spatial light modulator and determines the phases of unknown modes of the laser beam, to perform a modal decomposition of the laser beam.

    Abstract translation: 公开了一种用于执行激光束的模态分解的方法和装置。 该方法包括以下步骤：执行测量以确定激光束的第二力矩光束尺寸（w）和光束传播因子（M2），并推断来自激光束的激光束的最佳基准集的比例因子（w0） 二次波束尺寸和波束传播因子，从关系：wO = w / M2。 使用比例因子wO执行最佳分解以获得适应尺寸的最佳模式集合。 该装置包括布置成用于入射激光束的复振幅调制的空间光调制器，以及被配置为将入射激光束引导到空间光调制器上的成像装置。 傅立叶变换透镜被布置成接收从空间光调制器反射的激光束。 离开傅里叶变换透镜放置距离一个焦距的检测器，用于监测从空间光调制器反射并穿过傅里叶变换透镜的激光束的衍射图案。 该装置对从空间光调制器反射的激光束进行光学傅立叶变换，并确定激光束的未知模式的相位，以执行激光束的模态分解。

    INFORMATION PROCESSING APPARATUS, METHOD THEREFOR, AND MEASUREMENT APPARATUS
    24.
    发明申请
    INFORMATION PROCESSING APPARATUS, METHOD THEREFOR, AND MEASUREMENT APPARATUS 有权
    信息处理装置，方法及测量装置

    公开(公告)号：US20150292863A1

    公开(公告)日：2015-10-15

    申请号：US14682143

    申请日：2015-04-09

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Hisayoshi Furihata ,  Masakazu Fujiki ,  Kazuhiko Kobayashi ,  Masahiro Suzuki

    IPC: G01B11/00 ,  G06T7/60 ,  H04N5/232 ,  G06T7/00 ,  G01B11/25 ,  G01J9/00

    CPC classification number: H04N5/23216 ,  G01B11/2522 ,  G01J9/00 ,  G06T7/521 ,  G06T7/593 ,  G06T7/62 ,  G06T2207/20076

    Abstract: A spread degree of a geometric feature in a surface of an object to be measured is estimated. The geometric feature is included in a geometric pattern, and will be observed in an image obtained by capturing the object on which the geometric pattern is projected. A parameter is set based on the estimated spread degree. Based on the parameter, a point on the geometric pattern is set in a captured image obtained by capturing the object to be measured on which the geometric pattern is projected. A three-dimensional position on the surface of the object corresponding to the set point is calculated.

    Abstract translation: 估计被测量物体的表面中的几何特征的展开度。 几何特征被包含在几何图案中，并且将在通过捕获其上投影几何图案的对象而获得的图像中观察。 基于估计的扩展度设置参数。 基于参数，将几何图案上的点设置在通过捕获其上投影几何图案的待测量对象而获得的捕获图像中。 计算与设定点对应的物体表面上的三维位置。

    Partitioned aperture wavefront imaging method and system
    27.
    发明授权
    Partitioned aperture wavefront imaging method and system 有权
    分区孔径波前成像方法和系统

    公开(公告)号：US09091862B2

    公开(公告)日：2015-07-28

    申请号：US14237958

    申请日：2013-07-24

    Applicant: Jerome Charles Mertz ,  Kengyeh Ken Chu ,  Ashwin Parthasarathy

    Inventor： Jerome Charles Mertz ,  Kengyeh Ken Chu ,  Ashwin Parthasarathy

    IPC: G02B21/36 ,  G01J9/00

    CPC classification number: G02B21/361 ,  G01J9/00

    Abstract: A partitioned aperture wavefront imaging system includes an imaging system comprising a partitioned aperture lens array positioned at the aperture plane or Fourier plane between the entrance plane and camera plane of an imaging system. The partitioned aperture lens array can include 2 or more off-axis lenses symmetrically distributed about an optical axis, and adapted to produce simultaneously at the camera plane at least two images of an object, or intermediate image of an object, presented at the entrance plane. Preferably, the partitioned aperture lens array includes from 3 to 5 off-axis lenses and produces 3 to 5 images at the camera plane from which phase and amplitude information about the light field can be determined. The partitioned aperture wavefront imaging system provides enough information about the light field presented at the entrance plane to enable reconstruction of the light field at other planes relative to the entrance plane.

    Abstract translation: 分割孔径波前成像系统包括成像系统，该成像系统包括位于成像系统的入射面和相机平面之间的孔径平面或傅立叶平面处的分隔孔径透镜阵列。 分隔的孔径透镜阵列可以包括关于光轴对称分布的2个或更多个离轴透镜，并且适于在相机平面处同时产生呈现在入射面处的物体或物体的中间图像的至少两个图像 。 优选地，分隔开的孔径透镜阵列包括3至5个离轴透镜，并且在照相机平面处产生3至5幅图像，从该相位平面可以确定关于光场的相位和幅度信息。 分割孔径波前成像系统提供关于入射面处呈现的光场的足够信息，以使得能够在相对于入射面的其它平面处重建光场。

    System and method for increasing coherence length in lidar systems
    28.
    发明授权
    System and method for increasing coherence length in lidar systems 有权
    激光雷达系统中增加相干长度的系统和方法

    公开(公告)号：US09081090B2

    公开(公告)日：2015-07-14

    申请号：US13843227

    申请日：2013-03-15

    Applicant: Digital Signal Corporation

    Inventor： Richard L. Sebastian ,  Kendall L. Belsley ,  Stephan Schulz

    IPC: H01S3/10 ,  G02B26/06 ,  G01S17/32 ,  G01J9/00 ,  G01S7/491 ,  G01S7/497

    CPC classification number: G01S7/4911 ,  G01J9/00 ,  G01J9/02 ,  G01S7/4915 ,  G01S7/497 ,  G01S17/325 ,  G02B26/06 ,  H01S3/0085 ,  H01S3/10053 ,  H01S3/1307

    Abstract: Various implementations of the invention compensate for “phase wandering” in tunable laser sources. Phase wandering may negatively impact a performance of a lidar system that employ such laser sources, typically by reducing a coherence length/range of the lidar system, an effective bandwidth of the lidar system, a sensitivity of the lidar system, etc. Some implementations of the invention compensate for phase wandering near the laser source and before the output of the laser is directed toward a target. Some implementations of the invention compensate for phase wandering in the target signal (i.e., the output of the laser that is incident on and reflected back from the target). Some implementations of the invention compensate for phase wandering at the laser source and in the target signal.

    Abstract translation: 本发明的各种实现补偿了可调谐激光源中的“相位漂移”。 相位漂移可能会对使用这种激光源的激光雷达系统的性能产生负面影响，通常通过降低激光雷达系统的相干长度/范围，激光雷达系统的有效带宽，激光雷达系统的灵敏度等。 本发明补偿激光源附近的相位漂移，并且在激光器的输出被指向目标之前。 本发明的一些实施方式补偿目标信号中的相位漂移（即，入射并从目标反射回来的激光器的输出）。 本发明的一些实施方式补偿了激光源和目标信号中的相位漂移。

    Broadband, common-path, interferometric wavefront sensor
    29.
    发明授权
    Broadband, common-path, interferometric wavefront sensor 有权
    宽带，公共路径，干涉波前传感器

    公开(公告)号：US09063002B2

    公开(公告)日：2015-06-23

    申请号：US13747235

    申请日：2013-01-22

    Applicant: California Institute of Technology

    Inventor： James Kent Wallace

    IPC: G01B9/02 ,  G01J1/20 ,  G01J9/02 ,  G01J9/00

    CPC classification number: G01J9/0215 ,  G01J9/00 ,  G01J9/02 ,  G01J2009/0226

    Abstract: Hybrid sensors comprising Shack-Hartmann Wavefront Sensor (S-HWFS) and Zernike Wavefront Sensor (Z-WFS) capabilities are presented. The hybrid sensor includes a Z-WFS optically arranged in-line with a S-HWFS such that the combined wavefront sensor operates across a wide dynamic range and noise conditions. The Z-WFS may include the ability to introduce a dynamic phase shift in both transmissive and reflective modes.

    Abstract translation: 提出了包括Shack-Hartmann波前传感器（S-HWFS）和Zernike波前传感器（Z-WFS）功能的混合传感器。 混合传感器包括与S-HWFS成线性配置的Z-WFS，使得组合的波前传感器在宽动态范围和噪声条件下工作。 Z-WFS可以包括在透射和反射模式中引入动态相移的能力。

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