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12 条记录 (耗时 0.024 秒)

    Multiplexing and selective updatable fixing and erasing of volume holograms in photorefractive media and second harmonic generation in photorefractive media by optically induced periodic poling
    4.
    发明授权
    Multiplexing and selective updatable fixing and erasing of volume holograms in photorefractive media and second harmonic generation in photorefractive media by optically induced periodic poling 失效
    光折射介质中体积全息图的复用和选择性可更新固定和擦除，光折射介质中的二次谐波生成

    公开(公告)号：US5422873A

    公开(公告)日：1995-06-06

    申请号：US37076

    申请日：1993-03-25

    申请人： Anthony S. Kewitsch ,  Mordechai Segev ,  Amnon Yariv

    发明人： Anthony S. Kewitsch ,  Mordechai Segev ,  Amnon Yariv

    IPC分类号： G03H1/26 ,  G11C13/04 ,  G11B7/00

    CPC分类号： G11C13/042 ,  G03H1/2645 ,  G03H1/0248 ,  G03H2001/0268 ,  G03H2001/2615 ,  G03H2260/35

    摘要： New methods are presented for multiplexing volume holograms in electrooptic materials. Multiple volume holograms can be superimposed in a medium and be individually addressed by tuning the underlying refractive index of the medium or the crystal parameters, while keeping the external parameters (wavelength, angles) fixed. According to the presented methods, the refractive index and crystal parameters of the material can be varied via the electrooptic, elastooptic or piezoelectric effects, alone or in combination with each other, by tuning the value of an applied electric field, or by tuning an applied mechanical stress, or by changing the material temperature. Volume holograms that have been multiplexed by either wavelength or angle or electric field or mechanical stress or temperature can be individually addressed by any one of the same five parameters. Additionally, selective, updatable fixing and erasing of volume holograms in photorefractive media is described. Each holographic page may be fixed individually and overwritten without destroying the other fixed pages. Further, Second Harmonic Generation and Parametric Amplification by optically induced periodic poling in ferroelectric photorefractive materials is described.

    摘要翻译： 提出了新的电光学材料中多重体积全息图的方法。 多个体积全息图可以叠加在介质中，并通过调节介质的潜在折射率或晶体参数，同时保持外部参数（波长，角度）固定而单独寻址。 根据所提出的方法，材料的折射率和晶体参数可以通过电光，弹性或压电效应单独或彼此组合，通过调节所施加的电场的值，或通过调谐施加的 机械应力，或通过改变材料温度。 通过波长或角度或电场或机械应力或温度复用的体积全息图可以通过相同的五个参数中的任何一个来单独寻址。 另外，描述了在光折射介质中的体积全息图的选择性，可更新的固定和擦除。 每个全息页可以单独固定和重写，而不会破坏其他固定页。 此外，描述了在铁电光折变材料中的光诱导周期极化的第二谐波产生和参数放大。

    Optical pin-point microphone
    5.
    发明授权
    Optical pin-point microphone 有权
    光学针尖麦克风

    公开(公告)号：US09277330B2

    公开(公告)日：2016-03-01

    申请号：US12567325

    申请日：2009-09-25

    申请人： Abraham Aharoni ,  Mordechai Segev ,  Zvi Katz

    发明人： Abraham Aharoni ,  Mordechai Segev ,  Zvi Katz

    IPC分类号： H04R23/00 ,  H04R25/00

    CPC分类号： H04R23/008 ,  H04R25/405

    摘要： A system and method for directional sound sensing directs an optical sensing beam to an object of interest having a rough surface that vibrates acoustically. The light is reflected thereby and scattered as a speckle pattern that includes multiple speckles having a random distribution of phase offsets. A detector array having multiple detector elements receives and detects the speckle pattern and produces signals that are linearly proportional to phase modulation of the speckles. A summer receives signals from at least two of the detector elements that are offset at different phases and sums the received signals to generate a non-vanishing signal representative of an acoustic signal.

    摘要翻译： 用于定向声音感测的系统和方法将光学感测光束引导到具有声学振动的粗糙表面的感兴趣对象。 光被反射并散射为散斑图案，其包括具有相位偏移的随机分布的多个斑点。 具有多个检测器元件的检测器阵列接收并检测斑点图案并产生与斑点相位调制成线性比例的信号。 夏天从不同相位偏移的至少两个检测器元件接收信号，并且对接收到的信号求和以产生表示声信号的非消失信号。

    OPTICAL PIN-POINT MICROPHONE
    6.
    发明申请
    OPTICAL PIN-POINT MICROPHONE 有权
    光学点式麦克风

    公开(公告)号：US20100189291A1

    公开(公告)日：2010-07-29

    申请号：US12567325

    申请日：2009-09-25

    申请人： Abraham Aharoni ,  Mordechai Segev ,  Zvi Katz

    发明人： Abraham Aharoni ,  Mordechai Segev ,  Zvi Katz

    IPC分类号： H04R25/00

    CPC分类号： H04R23/008 ,  H04R25/405

    摘要： An optical pin-point microphone has a light source for directing a sensing beam to an object of interest so as to be reflected thereby as a reflected signal beam, a detector having multiple detector elements for receiving the reflected signal beam, and a summer for receiving signals from at least two of the detector elements and detecting, rectifying, amplifying and summing the received signals to generate a non-vanishing signal representative of an acoustic signal.

    摘要翻译： 光学针尖麦克风具有用于将感测光束引导到感兴趣物体的光源，以便作为反射信号光束反射，具有用于接收反射信号光束的多个检测器元件的检测器和用于接收的加热器 来自至少两个检测器元件的信号，并且检测，整流，放大和求和接收的信号以产生表示声信号的非消失信号。

    Method and system for super-resolution signal reconstruction
    9.
    发明授权
    Method and system for super-resolution signal reconstruction 有权
    超分辨率信号重建方法与系统

    公开(公告)号：US09159119B2

    公开(公告)日：2015-10-13

    申请号：US13344341

    申请日：2012-01-05

    申请人： Yoav Shechtman ,  Alexander Szameit ,  Mordechai Segev ,  Oren Cohen ,  Yonina Eldar ,  Snir Gazit ,  Pavel Sidorenko

    发明人： Yoav Shechtman ,  Alexander Szameit ,  Mordechai Segev ,  Oren Cohen ,  Yonina Eldar ,  Snir Gazit ,  Pavel Sidorenko

    IPC分类号： H04N7/18 ,  G06F15/00 ,  G06K9/46 ,  G06K9/00 ,  G06K9/36 ,  G06T3/40

    CPC分类号： G06T3/4053

    摘要： A method and system are presented for reconstructing an input field where the latter is sensed by a measurement system. The method comprises: providing measured data corresponding to output field of said measurement system; providing data about sparsity of the input field, and data about effective response function of the measurement system; and processing the measured data based on said known data, the processing comprising: determining a sparse vector as a function of said measured data, said data about the sparsity of the input field, and said data about the effective response function; and using the sparse vector for reconstructing the input information. The invention allows for sub-wavelength resolution in imaging applications, and allows for detection of very short pulses by slow detectors in some other applications.

    摘要翻译： 提出了一种用于重建输入场的方法和系统，其中后者由测量系统感测。 该方法包括：提供对应于所述测量系统的输出场的测量数据; 提供关于输入字段的稀疏性的数据和关于测量系统的有效响应功能的数据; 以及基于所述已知数据处理测量数据，所述处理包括：确定作为所述测量数据的函数的稀疏向量，关于所述输入字段的稀疏度的所述数据以及关于所述有效响应函数的所述数据; 并使用稀疏向量来重构输入信息。 本发明允许成像应用中的亚波长分辨率，并且允许在一些其它应用中通过慢速检测器检测非常短的脉冲。

    METHOD AND SYSTEM FOR MANIPULATING FLUID MEDIUM
    10.
    发明申请
    METHOD AND SYSTEM FOR MANIPULATING FLUID MEDIUM 有权
    用于操纵流体介质的方法和系统

    公开(公告)号：US20110023973A1

    公开(公告)日：2011-02-03

    申请号：US12935003

    申请日：2009-03-25

    申请人： Mordechai Segev ,  Demetrios N. Christodoulides ,  Carmel Rotschild

    发明人： Mordechai Segev ,  Demetrios N. Christodoulides ,  Carmel Rotschild

    IPC分类号： F17D1/08

    CPC分类号： B01L3/50273 ,  B01L2400/0454 ,  F04B19/006 ,  F04B19/24 ,  Y10T137/0391 ,  Y10T137/206 ,  Y10T436/2575

    摘要： A system for manipulating a fluid medium is disclosed. The system comprises a plurality of particles suspended in the fluid medium, and a light source configured for irradiating the particles by light to induce nonlinear optical effects. The particles are constituted such that the nonlinear optical effects result in drag forces exerted by the particles on the fluid medium. The magnitude of the drag forces is sufficient to establish hydrodynamic flow of the fluid medium.

    摘要翻译： 公开了一种用于操纵流体介质的系统。 该系统包括悬浮在流体介质中的多个颗粒和被配置用于通过光照射颗粒以引起非线性光学效应的光源。 颗粒被构造成使得非线性光学效应导致由颗粒施加在流体介质上的阻力。 牵引力的大小足以建立流体介质的流体动力学流动。