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    • 1. 发明申请
    • Phase From Defocused Color Images
    • 相位从散焦的彩色图像
    • US20110085173A1
    • 2011-04-14
    • US12898830
    • 2010-10-06
    • Laura A. WallerGeorge Barbastathis
    • Laura A. WallerGeorge Barbastathis
    • G01B9/02
    • G01J9/00
    • Phase differences associated with a defocused wavefront can be determined from a single color image. The color image, which is a measurement of intensity as a function of wavelength, is used to calculate the change in intensity with respect to wavelength over the image plane. The change in intensity can then be used to estimate a phase difference associated with the defocused wavefront using two-dimensional fast Fourier transform solvers. The phase difference can be used to infer information about objects in the path of the defocused wavefront. For example, it can be used to determine an object's shape, surface profile, or refractive index profile. It can also be used to calculate path length differences for actuating adaptive optical systems. Compared to other techniques, deriving phase from defocused color images is faster, simpler, and can be implemented using standard color filters.
    • 与散焦波前相关联的相位差可以从单个彩色图像确定。 使用作为波长的函数的强度测量值的彩色图像来计算相对于图像平面上的波长的强度变化。 然后可以使用强度的变化来使用二维快速傅里叶变换解算器估计与散焦波前相关联的相位差。 相位差可用于推断散焦波前路径中的物体信息。 例如,它可以用于确定物体的形状,表面轮廓或折射率分布。 它也可以用于计算启动自适应光学系统的路径长度差异。 与其他技术相比,散焦色彩图像的相位更快,更简单,可以使用标准滤色镜实现。
    • 2. 发明授权
    • Phase from defocused color images
    • 相位从散焦的彩色图像
    • US08432553B2
    • 2013-04-30
    • US12898830
    • 2010-10-06
    • Laura A. WallerGeorge Barbastathis
    • Laura A. WallerGeorge Barbastathis
    • G01B9/02G01B11/02
    • G01J9/00
    • Phase differences associated with a defocused wavefront can be determined from a single color image. The color image, which is a measurement of intensity as a function of wavelength, is used to calculate the change in intensity with respect to wavelength over the image plane. The change in intensity can then be used to estimate a phase difference associated with the defocused wavefront using two-dimensional fast Fourier transform solvers. The phase difference can be used to infer information about objects in the path of the defocused wavefront. For example, it can be used to determine an object's shape, surface profile, or refractive index profile. It can also be used to calculate path length differences for actuating adaptive optical systems. Compared to other techniques, deriving phase from defocused color images is faster, simpler, and can be implemented using standard color filters.
    • 与散焦波前相关联的相位差可以从单个彩色图像确定。 使用作为波长的函数的强度测量值的彩色图像来计算相对于图像平面上的波长的强度变化。 然后可以使用强度的变化来使用二维快速傅里叶变换解算器估计与散焦波前相关联的相位差。 相位差可用于推断散焦波前路径中的物体信息。 例如,它可以用于确定物体的形状,表面轮廓或折射率分布。 它也可以用于计算启动自适应光学系统的路径长度差异。 与其他技术相比,散焦色彩图像的相位更快,更简单,可以使用标准滤色镜实现。
    • 3. 发明授权
    • System, method and apparatus for phase-coded multi-plane microscopy
    • 用于相位编码多平面显微镜的系统,方法和装置
    • US09256202B2
    • 2016-02-09
    • US13476768
    • 2012-05-21
    • George BarbastathisYuan Luo
    • George BarbastathisYuan Luo
    • G03H1/10G03H1/12G02B5/32G03H1/00G03H1/02G03H1/22G03H1/28G03H1/26
    • G03H1/0005G02B5/32G03H1/0248G03H1/2286G03H1/28G03H2001/2675
    • A volume holographic imaging system enables the projection of a two-dimensional (2D) slice of a four-dimensional (4D) object. The 4D source object is illuminated to emit or scatter an optical field. A holographic element having one or more recorded holograms receives and diffracts the optical field into a diffracted plane beam. A phase mask is encoded in one or more multiplexed holographic gratings of the holographic element using a spatial filter. A collector lens focuses the diffracted plane beam to a 2D slice of the 4D probing source object. The focused 2D slice is projected onto a 2D imaging plane. The holographic element may have multiple multiplexed holograms that are arranged to diffract light from a corresponding slice of the 4D probing source object to a non-overlapping region of the detector.
    • 体积全息成像系统能够投影四维(4D)物体的二维(2D)切片。 4D源对象被照亮以发射或散射光场。 具有一个或多个记录的全息图的全息元件接收衍射光学衍射到衍射平面光束。 使用空间滤波器将相位掩模编码在全息元件的一个或多个复用全息光栅中。 收集透镜将衍射平面光束聚焦到4D探测源对象的2D切片。 聚焦的2D切片投影到2D成像平面上。 全息元件可以具有多个复用全息图,其被布置成将来自4D探测源对象的相应切片的光衍射到检测器的非重叠区域。
    • 6. 发明授权
    • System and method for providing fast, low voltage integrated optical elements
    • 用于提供快速,低电压集成光学元件的系统和方法
    • US07477812B2
    • 2009-01-13
    • US11110511
    • 2005-04-20
    • Gregory N. NielsonGeorge Barbastathis
    • Gregory N. NielsonGeorge Barbastathis
    • G02B6/26
    • G02B6/3508G02B6/12007G02B6/2773G02B6/28G02B6/3504G02B6/3536G02B6/356G02B6/357G02B6/3584G02B6/3594G02B6/3596
    • A switching system is disclosed for an optical signal. The switching system includes a first optical waveguide coupled to a first electrode, a second electrode, and a second optical waveguide. The second optical waveguide is coupled to a movable electrode. The movable electrode is supported by a support structure and is positioned with respect to the first and second electrodes so that the position of the movable electrode may be selectively placed in either a first closed state or a second open state defined by the first and second electrodes under application of a voltage with respect to one of the first and second electrodes. The first closed state provides that the first and second optical waveguides are sufficiently close to each other to provide optical coupling therebetween while the second open state provides that the first and second optical communication channels are not sufficiently close to each other to provide optical coupling therebetween, or provide some different amount of optical coupling than in the first closed state.
    • 公开了一种用于光信号的交换系统。 开关系统包括耦合到第一电极,第二电极和第二光波导的第一光波导。 第二光波导耦合到可动电极。 可移动电极由支撑结构支撑并且相对于第一和第二电极定位,使得可动电极的位置可以选择性地放置在由第一和第二电极限定的第一闭合状态或第二开放状态 在相对于所述第一和第二电极之一施加电压的情况下。 第一闭合状态规定,第一和第二光波导彼此充分接近以在其间提供光耦合,而第二开放状态规定第一和第二光通信通道彼此之间不足够靠近以提供光耦合, 或提供与第一关闭状态相比不同量的光耦合。
    • 10. 发明授权
    • Holographic storage using shift multiplexing
    • 全息存储使用移位复用
    • US5671073A
    • 1997-09-23
    • US389890
    • 1995-02-15
    • Demetri PsaltisMichael J. LeveneAllen PuGeorge Barbastathis
    • Demetri PsaltisMichael J. LeveneAllen PuGeorge Barbastathis
    • G03H1/26G11B7/0065G03H1/12G11B7/00G11C13/04
    • G03H1/26G11B7/0065G03H2001/2675
    • The invention is embodied in a method of recording successive holograms in a recording medium, using at least a fan of M waves along at least a first axis with a separation angle between adjacent waves and directing the fan of M waves as a reference beam along a reference beam path onto the recording medium, successively modulating a wave with a succession of images to produce a succession of signal beams along a signal beam path lying at a propagation angle relative to the reference beam path so that the signal and reference beams intersect at a beam intersection lying within the medium, the beam intersection having a size corresponding to beam areas of the reference and signal beams, producing a succession of relative displacements in a direction parallel to the first axis between the recording medium and the beam intersection of the signal and reference beam paths in synchronism with the succession of signal beams, each of the displacements being less than the size of the intersection whereby to record successive holograms partially overlapped along a direction of the displacements.
    • 本发明体现在一种在记录介质中记录连续的全息图的方法,至少使用沿着至少第一轴的M波的风扇,并在相邻的波之间具有分隔角,并将M波的风扇作为参考光束沿着 参考光束路径到记录介质上,连续地调制具有一系列图像的波,以沿着相对于参考光束路径传播角度的信号光束路径产生一系列信号光束,使得信号和参考光束在 光束交叉处具有对应于参考和信号光束的光束区域的大小的光束交叉,在平行于第一轴的方向上产生一系列相对位移,该相对位移在记录介质与信号和 参考光束路径与信号光束的连续同步,每个位移小于相交的大小 从而记录连续的全息图沿着位移的方向部分重叠。