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98 条记录 (耗时 0.031 秒)

    Blue transparent second harmonic generator
    71.
    发明授权
    Blue transparent second harmonic generator 失效
    蓝色透明二次谐波发生器

    公开(公告)号：US5247602A

    公开(公告)日：1993-09-21

    申请号：US914163

    申请日：1992-07-14

    申请人： Thomas L. Penner ,  Douglas R. Robello ,  Nancy J. Armstrong ,  David J. Williams ,  Matthew C. Ezenyilimba

    发明人： Thomas L. Penner ,  Douglas R. Robello ,  Nancy J. Armstrong ,  David J. Williams ,  Matthew C. Ezenyilimba

    IPC分类号： G02F1/065 ,  G02F1/361 ,  G02F1/377

    CPC分类号： B82Y20/00 ,  G02F1/3618 ,  G02F1/377 ,  G02F1/065 ,  G02F2202/027 ,  Y10T428/31504

    摘要： An optical article is disclosed comprised of a support including a portion adjacent one major surface which is transparent to the electromagnetic radiation sought to be propagated, an organic layer unit capable of converting a portion of polarized electromagnetic radiation of a selected wavelength to its second harmonic wavelength, means for optically coupling into said organic layer unit polarized electromagnetic radiation of a selected wavelength in its zero order transverse magnetic mode, and means for receiving from the layer unit a portion of the electromagnetic radiation in the form of a first order transverse magnetic mode. The organic layer unit has a thickness which is at least 70 percent cf the wavelength of the zero order transverse magnetic mode and differs by less than 100 .ANG. from the thickness required for identical propagation constants of the zero and first order transverse magnetic modes. The organic layer unit is comprised of a Y-type Langmuir-Blodgett assembly of amphiphiles forming a first Langmuir Blodgett layer unit containing noncentrosymmetric organic molecular dipoles of a first orientation providing a second order polarization susceptibility to the first layer unit in excess of 10.sup.-9 electrostatic units, and a Y-type Langmuir-Blodgett assembly of amphiphiles forming a second Langmuir-Blodgett layer unit adapted to be coated on the first Langmuir-Blodgett layer unit containing noncentro-symmetric organic molecular dipoles of a second orientation providing a second order polarization susceptibility to the second layer unit in excess of 10.sup.-9 electrostatic units, but of opposite sign to that of the first layer unit.

    摘要翻译： 公开了一种光学制品，其包括支撑件，该支撑件包括邻近被试传播的电磁辐射透明的一个主表面的部分，能够将所选波长的偏振电磁辐射的一部分转换成其二次谐波波长的有机层单元 用于以其零级横向磁模式光学耦合到选定波长的有机层单元极化电磁辐射的装置，以及用于从层单元接收一阶横向磁模式形式的电磁辐射的一部分的装置。 有机层单元的厚度至少为零级横向磁模的波长的70％，并且与零和一级横向磁模的相同传播常数所需的厚度相差小于100安培。 有机层单元由形成第一Langmuir Blodgett层单元的Y型Langmuir-Blodgett组件组成，其包含第一取向的非中心对称有机分子偶极子，其提供超过10-9的第一层单元的二阶极化敏感性 静电单元和形成第二Langmuir-Blodgett层单元的Y型Langmuir-Blodgett组件，其适于涂覆在第一Langmuir-Blodgett层单元上，所述第一Langmuir-Blodgett层单元包含提供二阶极化的第二取向的非对称有机分子偶极子 对第二层单元的敏感性超过10-9静电单位，但与第一层单元的相反。

    Conversion efficiency second harmonic generator
    72.
    发明授权
    Conversion efficiency second harmonic generator 失效
    转换效率二次谐波发生器

    公开(公告)号：US5150446A

    公开(公告)日：1992-09-22

    申请号：US760436

    申请日：1991-09-16

    申请人： Thomas L. Penner ,  Douglas R. Robello ,  Nancy J. Armstrong ,  David J. Williams

    发明人： Thomas L. Penner ,  Douglas R. Robello ,  Nancy J. Armstrong ,  David J. Williams

    IPC分类号： G02F1/37 ,  G02F1/065 ,  G02F1/361 ,  G02F1/377

    CPC分类号： B82Y20/00 ,  G02F1/3618 ,  G02F1/377 ,  G02F1/065 ,  G02F2202/027

    摘要： An optical article is disclosed comprised of a support including a portion adjacent one major surface which is transparent to the electromagnetic radiation sought to be propagated, an organic layer unit capable of converting a portion of polarized electromagnetic radiation of a selected wavelength to its second harmonic wavelength, means for optically coupling into said organic layer unit polarized electromagnetic radiation of a selected wavelength in its zero order transverse magnetic mode, and means for receiving from the layer unit a portion of the electromagnetic radiation in the form of a first order transverse magnetic mode. The organic layer unit has a thickness which is at least 70 percent of the wavelength of the zero order transverse magnetic mode and differs by less than 100.ANG. from the thickness required for identical propagation constants of the zero and first order transverse magnetic modes. The organic layer unit is comprised of a Y-type Langmuir-Blodgett assembly of amphiphiles forming a first Langmuir-Blodgett layer unit containing noncentrosymmetric organic molecular dipoles of a first orientation providing a second order polarization susceptibility to the first layer unit in excess of 10.sup.-9 electrostatic units, and a Y-type Langmuir-Blodgett assembly of amphiphiles forming a second Langmuir-Blodgett layer unit adapted to be coated on the first Langmuir-Blodgett layer unit containing noncentro-symmetric organic molecular dipoles of a second orientation providing a second order polarization susceptibility to the second layer unit in excess of 10.sup.-9 electrostatic units, but of opposite sign to that of the first layer unit.

    Integrated electro-optical scanner
    73.
    发明授权
    Integrated electro-optical scanner 失效
    集成电光扫描仪

    公开(公告)号：US5052771A

    公开(公告)日：1991-10-01

    申请号：US632195

    申请日：1990-12-21

    申请人： David J. Williams ,  Joseph F. Revelli

    发明人： David J. Williams ,  Joseph F. Revelli

    IPC分类号： G02B6/12 ,  G02F1/065 ,  G02F1/295 ,  H04N1/12

    CPC分类号： H04N1/1275 ,  G02B6/12004 ,  G02F1/065 ,  G02F1/2955 ,  H04N1/12

    摘要： A fully integrated electro-optic page-scanner comprises an optically-transparent waveguide made from an electro-optic polymer, and a linear array of electrically-addressable, spaced, parallel electrodes for selectively altering the refractive index across pixel-sized portions of the polymeric waveguide. Parallel addressing of the electrodes in accordance with the intensity pattern of a line of pixels to be recorded acts to modulate the phase front of an optical wave propagating within the waveguide in accordance with such line intensity pattern. Schlieren optics, also integrated with the page-scanner, convert the phase-front-modulated wave to an intensity-modulated pixel pattern which can be imaged onto a moving photosensitive recording element to record a two-dimensional (page) of image information. By using an electro-optic polymer as the waveguide, certain disadvantages of prior art scanning devices are eliminated.

    摘要翻译： 完全集成的电光寻像扫描器包括由电光聚合物制成的光学透明波导和可电寻址的间隔开的平行电极的线性阵列，用于选择性地改变聚合物的像素尺寸部分的折射率 波导。 根据要记录的像素行的强度图案，电极的并行寻址用于根据这种线强度图案来调制在波导内传播的光波的相位前沿。 也与页面扫描仪集成的施利伦光学器件将相位前调制波转换成强度调制像素图案，其可以被成像到移动的光敏记录元件上以记录图像信息的二维（页）。 通过使用电光聚合物作为波导，消除了现有技术的扫描装置的某些缺点。

    Process for preparing styrenic polymer particles
    76.
    发明授权
    Process for preparing styrenic polymer particles 失效
    苯乙烯聚合物颗粒的制备方法

    公开(公告)号：US4271281A

    公开(公告)日：1981-06-02

    申请号：US154184

    申请日：1980-05-29

    申请人： Donald J. Kelley ,  David J. Williams ,  Stephen V. Slovenkai

    发明人： Donald J. Kelley ,  David J. Williams ,  Stephen V. Slovenkai

    IPC分类号： C08F2/00 ,  C08F2/18 ,  C08F2/20 ,  C08F12/02 ,  C08J3/12

    CPC分类号： C08F12/02

    摘要： Styrenic polymer particles having a uniform particle size distribution are prepared without the formation of fine polymer powders. The suspension polymerization process which comprises providing a stirred, aqueous suspension of polymeric seed particles, adding gradually to the suspension styrenic monomer and polymerizing it therein, and continuing the addition of monomer as the polymerization proceeds, may be improved by introducing the styrenic monomer below the surface of the suspension.

    摘要翻译： 制备具有均匀粒度分布的苯乙烯聚合物颗粒，而不形成细聚合物粉末。 悬浮聚合方法包括提供聚合种子颗粒的搅拌的水悬浮液，逐渐加入到悬浮苯乙烯单体中并在其中聚合，并且随着聚合的进行继续加入单体，可以通过将苯乙烯单体引入到 悬浮液表面。

    Foams And Foamable Compositions Containing Halogenated Olefin Blowing Agents
    77.
    发明申请
    Foams And Foamable Compositions Containing Halogenated Olefin Blowing Agents 审中-公开

    公开(公告)号：US20180016379A1

    公开(公告)日：2018-01-18

    申请号：US15639455

    申请日：2017-06-30

    申请人： David J. Williams ,  Clifford P. Gittere ,  Michael Van Der Puy

    发明人： David J. Williams ,  Clifford P. Gittere ,  Michael Van Der Puy

    IPC分类号： C08G18/18 ,  C08J9/14 ,  C08G101/00

    CPC分类号： C08G18/1808 ,  C08G18/1816 ,  C08G2101/00 ,  C08G2101/005 ,  C08G2105/02 ,  C08J9/144 ,  C08J9/146 ,  C08J2375/04

    摘要： The invention provides foam forming methods that comprise: (a) preparing a foamable system comprising at least one hydrohaloolefin; and (b) ensuring either (i) the substantial absence of long-term decomposition-inducing contact between said hydrofluoroolefin and an amine-containing catalyst; (ii) that an effective amount of surfactant is available in the system under conditions which prevent long term exposure of the surfactant to a long-term decomposition reaction environment; or (iii) a combination of (i) and (ii). Related methods, foamable systems and foams are also disclosed. Preferred embodiments provide polyurethane and polyisocyanurate foams and methods for the preparation thereof, including closed-celled, polyurethane and polyisocyanurate foams and methods for their preparation. The preferred foams are characterized by a fine uniform cell structure and little or no foam collapse. The foams are preferably produced with a polyol premix composition which comprises a combination of a hydrohaloolefin blowing agent, a polyol, a silicone surfactant, a catalyst and is further characterized by being substantially free of added water.