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    Optical fiber coupling having liquid crystal adaptive coupler
    1.
    发明申请
    Optical fiber coupling having liquid crystal adaptive coupler 有权
    具有液晶自适应耦合器的光纤耦合器

    公开(公告)号：US20050041919A1

    公开(公告)日：2005-02-24

    申请号：US10948855

    申请日：2004-09-23

    申请人： Dong-Feng Gu ,  Donald Taber ,  Bruce Winker

    发明人： Dong-Feng Gu ,  Donald Taber ,  Bruce Winker

    IPC分类号： G02B6/32 ,  G02B6/35 ,  G02F1/139 ,  G02F1/29 ,  G02B6/26

    CPC分类号： G02F1/292 ,  G02B6/32 ,  G02B6/351 ,  G02B6/3556 ,  G02F1/1392

    摘要： An apparatus for optically coupling a light source with a light-receiving end face of an optical waveguide comprises a lens for focusing a light beam emitted from the light source at a focal point on the light-receiving end face of the optical waveguide. An adaptive coupler, positioned in the optical path, is responsive to a beam steering control signal for steering and aligning the focal point relative to the light-receiving end face of the optical waveguide. In one form, the adaptive coupler comprises a pair of transparent substrates having confronting, parallel inner faces, the inner face of one of the pair of substrates carrying a beam intercepting, optically transparent, constant potential electrode and the inner face of the other of the pair of substrates carrying an electrically resistive, beam intercepting, optically transparent film. A pair of spaced apart electrodes in electrical contact with the film apply a linear voltage gradient along the film. An electro-optical phase shifting medium is disposed between the confronting inner faces of the substrates. The application of selected voltages to the electrodes creates a linear voltage gradient along the aforementioned film on the inner face of the one substrate resulting in a linearly varying electric field between that film and the constant potential electrode creating a corresponding linear variation in the refractive index of the liquid crystal medium and a linear wavefront tilt in the intercepting optical beam.

    摘要翻译： 用于将光源与光波导的光接收端面光学耦合的装置包括用于将从光源发射的光束聚焦在光波导的光接收端面上的焦点处的透镜。 定位在光路中的自适应耦合器响应于光束转向控制信号，用于相对于光波导的光接收端面转向和对准焦点。 在一种形式中，自适应耦合器包括一对具有相对的平行内表面的透明基板，一对基板中的一个基板的内表面承载光束拦截，光学透明的恒定电位电极，另一个的内表面 一对基板承载电阻，光束截取的光学透明膜。 与膜电接触的一对间隔开的电极沿膜施加线性电压梯度。 电光移相介质设置在基板的相对的内表面之间。 将选择的电压施加到电极在一个衬底的内表面上沿着上述膜产生线性电压梯度，导致该膜和恒电位电极之间线性变化的电场产生相应的线性变化 液晶介质和截取光束中的线性波前倾斜。

    Apparatus for optically coupling a light source with an optical waveguide
    2.
    发明申请
    Apparatus for optically coupling a light source with an optical waveguide 有权
    用于将光源与光波导光学耦合的装置

    公开(公告)号：US20050041920A1

    公开(公告)日：2005-02-24

    申请号：US10948856

    申请日：2004-09-23

    申请人： Dong-Feng Gu ,  Donald Taber ,  Bruce Winker

    发明人： Dong-Feng Gu ,  Donald Taber ,  Bruce Winker

    IPC分类号： G02B6/32 ,  G02B6/35 ,  G02F1/139 ,  G02F1/29 ,  G02B6/26

    CPC分类号： G02F1/292 ,  G02B6/32 ,  G02B6/351 ,  G02B6/3556 ,  G02F1/1392

    摘要： An apparatus for optically coupling a light source with a light-receiving end face of an optical waveguide comprises a lens for focusing a light beam emitted from the light source at a focal point on the light-receiving end face of the optical waveguide. An adaptive coupler, positioned in the optical path, is responsive to a beam steering control signal for steering and aligning the focal point relative to the light-receiving end face of the optical waveguide. In one form, the adaptive coupler comprises a pair of transparent substrates having confronting, parallel inner faces, the inner face of one of the pair of substrates carrying a beam intercepting, optically transparent, constant potential electrode and the inner face of the other of the pair of substrates carrying an electrically resistive, beam intercepting, optically transparent film. A pair of spaced apart electrodes in electrical contact with the film apply a linear voltage gradient along the film. An electro-optical phase shifting medium is disposed between the confronting inner faces of the substrates. The application of selected voltages to the electrodes creates a linear voltage gradient along the aforementioned film on the inner face of the one substrate resulting in a linearly varying electric field between that film and the constant potential electrode creating a corresponding linear variation in the refractive index of the liquid crystal medium and a linear wavefront tilt in the intercepting optical beam.

    摘要翻译： 用于将光源与光波导的光接收端面光学耦合的装置包括用于将从光源发射的光束聚焦在光波导的光接收端面上的焦点处的透镜。 定位在光路中的自适应耦合器响应于光束转向控制信号，用于相对于光波导的光接收端面转向和对准焦点。 在一种形式中，自适应耦合器包括一对具有相对的平行内表面的透明基板，一对基板中的一个基板的内表面承载光束拦截，光学透明的恒定电位电极，另一个的内表面 一对基板承载电阻，光束截取的光学透明膜。 与膜电接触的一对间隔开的电极沿膜施加线性电压梯度。 电光移相介质设置在基板的相对的内表面之间。 将选择的电压施加到电极在一个衬底的内表面上沿着上述膜产生线性电压梯度，导致该膜和恒电位电极之间线性变化的电场产生相应的线性变化 液晶介质和截取光束中的线性波前倾斜。

    Spatial light modulator employing voltage gradient pixels, and associated methods
    4.
    发明申请
    Spatial light modulator employing voltage gradient pixels, and associated methods 有权
    采用电压梯度像素的空间光调制器及相关方法

    公开(公告)号：US20070069999A1

    公开(公告)日：2007-03-29

    申请号：US11237129

    申请日：2005-09-28

    申请人： Dong-Feng Gu ,  Bruce Winker

    发明人： Dong-Feng Gu ,  Bruce Winker

    IPC分类号： G09G3/34

    CPC分类号： G02F1/292 ,  G02F2203/18 ,  G02F2203/24

    摘要： A spatial light modulator has a transmissive window with a transparent conductive film forming a ground plane and a direct drive backplane with a plurality of voltage gradient pixels. Each of the voltage gradient pixels has (a) resistive film, (b) resistive metal conductor frame on a boundary of the resistive film, and (c) conductive metal leads between a substrate of the direct drive backplane and the resistive metal frame. Differential voltages applied to the metal frame via the conductive metal leads generate a selective two-dimensional linear voltage gradient across the resistive film. A layer of liquid crystal material is disposed between the transmissive window and the voltage gradient pixels. Liquid crystal material of each voltage gradient pixel is responsive to an electric field generated by the voltage gradient to two-dimensionally alter phase of a wavefront incident thereon.

    摘要翻译： 空间光调制器具有透明窗口，其具有形成接地平面的透明导电膜和具有多个电压梯度像素的直接驱动背板。 每个电压梯度像素具有（a）电阻膜，（b）电阻膜的边界上的电阻金属导体框架，以及（c）直接驱动背板的基板和电阻金属框架之间的导电金属引线。 通过导电金属引线施加到金属框架的差分电压在电阻膜上产生选择性的二维线性电压梯度。 一层液晶材料设置在透射窗和电压梯度像素之间。 每个电压梯度像素的液晶材料响应于由电压梯度产生的电场，以二维地改变入射在其上的波前的相位。

    LIQUID CRYSTAL BASED BROADBAND FILTER FOR FAST POLARIZATION IMAGING
    5.
    发明申请
    LIQUID CRYSTAL BASED BROADBAND FILTER FOR FAST POLARIZATION IMAGING 审中-公开
    基于液晶的宽带滤波器，用于快速极化成像

    公开(公告)号：US20100315567A1

    公开(公告)日：2010-12-16

    申请号：US12484849

    申请日：2009-06-15

    申请人： Bing Wen ,  Donald Taber ,  Dong-Feng Gu

    发明人： Bing Wen ,  Donald Taber ,  Dong-Feng Gu

    IPC分类号： G02F1/1335 ,  G01J4/00

    CPC分类号： G01J4/04 ,  G02B5/3016 ,  G02F1/13363 ,  G02F2001/133638 ,  G02F2203/07 ,  G02F2203/62 ,  G02F2413/04 ,  G02F2413/08

    摘要： A liquid crystal based broadband filter and imaging system for analyzing the polarization state of radiation. The filter includes four elements: a quarter wave plate; a 45° polarization rotator; a 90° polarization rotator; and a fixed polarizer. The first three of these elements are electronically switchable, allowing the user to select from any of the six possible polarization states. The switchable elements use multiple liquid crystal cells made from dual-frequency materials. A dual-frequency signal is used to activate and deactivate the various elements to achieve the desired state configuration. The dual-frequency signal drives the liquid crystal cells in and out of states, improving the overall switching time of the filter. The configuration of the liquid crystal cells within each of the filter allows broadband operation over most of the visible, infrared and ultraviolet spectra. The filter cycles through six configurations corresponding to the six polarization states of the incident radiation. Thus, the polarization state of the radiation can be completely characterized using the four Stokes parameters. Information related to the intensity and polarization of the radiation can be stored, displayed and analyzed.

    摘要翻译： 一种用于分析辐射极化状态的基于液晶的宽带滤波器和成像系统。 滤波器包括四个元件：四分之一波片; 45°偏振旋转器; 90°偏振旋转器; 和固定偏振器。 这些元件的前三个是电子可切换的，允许用户从六个可能的偏振状态中的任一个中进行选择。 可切换元件使用由双频材料制成的多个液晶单元。 使用双频信号来激活和去激活各种元件以实现期望的状态配置。 双频信号驱动液晶单元进入和退出状态，从而提高滤波器的整体切换时间。 每个滤波器内的液晶单元的配置允许宽带操作大多数可见光，红外和紫外光谱。 滤波器循环通过对应于入射辐射的六个偏振状态的六个配置。 因此，可以使用四个斯托克斯参数来完全表征辐射的偏振状态。 可以存储，显示和分析与辐射的强度和极化有关的信息。

    Touch screen
    8.
    发明授权
    Touch screen 有权
    触摸屏

    公开(公告)号：US06741237B1

    公开(公告)日：2004-05-25

    申请号：US09938095

    申请日：2001-08-23

    申请人： David J. Benard ,  Robert C. Addison ,  Dong-Feng Gu

    发明人： David J. Benard ,  Robert C. Addison ,  Dong-Feng Gu

    IPC分类号： G06K1106

    CPC分类号： G06F3/0436 ,  H03K2217/96011

    摘要： A plurality of acoustic wave transducers are coupled to a substrate at predetermined spaced apart locations. At least one of the transducers is operative to emit an acoustic wave that propagates along the substrate, with the other transducers operating as receivers of acoustic waves. The receivers are coupled to a control system that is operative to determine a location at which the substrate is perturbed based on time associated with travel of an acoustic wave from a transmitter, to the location of the perturbation, and from the perturbation to each of the respective receivers.

    摘要翻译： 多个声波换能器以预定间隔的位置耦合到基板。 换能器中的至少一个可操作地发射沿着衬底传播的声波，其他换能器作为声波的接收器工作。 接收器被耦合到控制系统，该控制系统可操作以基于与来自发射机的声波的移动相关联的时间到扰动的位置以及从扰动到每一个的扰动来确定衬底受到扰动的位置 各自的接收机。

    Two-stage drive waveform for switching a dual frequency liquid crystal (DFLC) at large tilt angles
    9.
    发明授权
    Two-stage drive waveform for switching a dual frequency liquid crystal (DFLC) at large tilt angles 有权
    用于以大倾角切换双频液晶（DFLC）的两级驱动波形

    公开(公告)号：US08330693B2

    公开(公告)日：2012-12-11

    申请号：US12497025

    申请日：2009-07-02

    申请人： Bing Wen ,  Dong-Feng Gu

    发明人： Bing Wen ,  Dong-Feng Gu

    IPC分类号： G09G3/36 ,  G02F1/133

    CPC分类号： G02F1/1392 ,  G02F1/13306 ,  G09G3/3629 ,  G09G2300/0482 ,  G09G2310/06

    摘要： A two-stage drive waveform switches a DFLC from a high tilt state to a low tilt state quickly and without scattering. A relaxation voltage is applied to delay the onset of the high amplitude high frequency kick voltage when switching from a high tilt state to a low tilt state. The relaxation voltage allows the molecules to ‘relax’ in accordance with their own elasticity towards their low tilt state in the direction of the average azimuth angle of the low tilt state. The kick voltage is then applied to drive the molecules quickly to the low tilt state. Optimal switching time and the desired molecular response is achieved by delaying the onset of the large kick voltage via application of the relaxation voltage. The relaxation voltage may constitute a lower amplitude holding voltage, a small or zero DC voltage or a smooth windowing of the kick voltage.

    摘要翻译： 两级驱动波形将DFLC从高倾斜状态快速切换到低倾斜状态，无散射。 当从高倾斜状态切换到低倾斜状态时，施加弛豫电压以延迟高幅度高频踢脚电压的开始。 松弛电压允许分子在低倾斜状态的平均方位角的方向上根据它们自身的弹性朝着它们的低倾斜状态而松弛。 然后施加击穿电压以快速将分子驱动到低倾斜状态。 通过施加松弛电压来延迟大的踢脚电压的开始来实现最佳切换时间和期望的分子响应。 弛豫电压可以构成较低的振幅保持电压，小的或零的直流电压或踢脚电压的平滑窗口。

    TWO-STAGE DRIVE WAVEFORM FOR SWITCHING A DUAL FREQUENCY LIQUID CRYSTAL (DFLC) AT LARGE TILT ANGLES
    10.
    发明申请
    TWO-STAGE DRIVE WAVEFORM FOR SWITCHING A DUAL FREQUENCY LIQUID CRYSTAL (DFLC) AT LARGE TILT ANGLES 有权
    用于在大倾斜角度切换双频液晶（DFLC）的两级驱动波形

    公开(公告)号：US20110001896A1

    公开(公告)日：2011-01-06

    申请号：US12497025

    申请日：2009-07-02

    申请人： Bing Wen ,  Dong-Feng Gu

    发明人： Bing Wen ,  Dong-Feng Gu

    IPC分类号： G09G3/36 ,  G02F1/133

    CPC分类号： G02F1/1392 ,  G02F1/13306 ,  G09G3/3629 ,  G09G2300/0482 ,  G09G2310/06

    摘要： A two-stage drive waveform switches a DFLC from a high tilt state such as above the LC's linear region or near the ‘saturated’ or ‘field-driven homeotropic’ state of the LC to a low tilt state quickly and without scattering. A relaxation voltage is applied to delay the onset of the high amplitude high frequency kick voltage when switching from a high tilt state to a low tilt state. The relaxation voltage allows the molecules to ‘relax’ in accordance with their own elasticity towards their low tilt state in the direction of the average azimuth angle of the low tilt state. Once the tilt angle has relaxed sufficiently, the kick voltage is applied to drive the molecules quickly to the low tilt state. Most unexpectedly, optimal switching time and the desired molecular response is achieved by delaying the onset of the large kick voltage via application of the relaxation voltage. The relaxation voltage may constitute a lower amplitude holding voltage, a small or zero DC voltage or a smooth windowing of the kick voltage. Whether to apply the relaxation voltage at all and how to apply the relaxation voltage for optimal switching are suitably controlled as a function of the high tilt state. The DFLC is suitably switched from the low-to-high tilt state in the conventional manner without application of a relaxation voltage.

    摘要翻译： 两级驱动波形将DFLC从LC倾斜状态（例如高于LC的线性区域）或接近LC的“饱和”或“场驱动垂直”状态切换到低倾斜状态，并且不发生散射。 当从高倾斜状态切换到低倾斜状态时，施加弛豫电压以延迟高幅度高频踢脚电压的开始。 松弛电压允许分子在低倾斜状态的平均方位角的方向上根据它们自身的弹性朝着它们的低倾斜状态“松弛”。 一旦倾斜角度已经充分放松，就施加踢击电压以将分子快速地驱动到低倾斜状态。 最意想不到的是，通过施加弛豫电压延迟大的踢脚电压的开始来实现最佳的开关时间和期望的分子响应。 弛豫电压可以构成较低的振幅保持电压，小的或零的直流电压或踢脚电压的平滑窗口。 作为高倾斜状态的函数，适当地控制是否施加弛豫电压以及如何施加用于最佳切换的弛豫电压。 DFLC适当地从常规方式从低到高倾斜状态切换，而不施加松弛电压。