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    • 3. 发明申请
    • OPTICAL WAVEGUIDE GRATING DEVICE AND SENSORS UTILISING THE DEVICE
    • 光学波导光栅设备和传感器使用设备
    • WO2003107053A1
    • 2003-12-24
    • PCT/GB2003/002412
    • 2003-06-04
    • ASTON PHOTONIC TECHNOLOGIES LIMITEDALLSOP, Thomas, David, PaulWEBB, DavidBENNION, Ian
    • ALLSOP, Thomas, David, PaulWEBB, DavidBENNION, Ian
    • G02B6/16
    • G01K11/3206G01D5/35341G01D5/3538G02B6/02095G02B6/021G02B6/02204
    • An optical waveguide grating device comprising a progressive three-layered (PTL) fibre (22), within which a long period grating (LPG) (24) is provided. The LPG's attenuation bands associated with cladding modes up to the 23 rd radial mode, particularly cladding modes below mode order (15), are essentially insensitive to changes in the refractive index n s of a surrounding medium, but are sensitive to temperature. Attenuation bands associated with cladding modes greater than 26 have refractive index and temperature dependent sensitivity parameters which are non-zero. By appropriate selection of the cladding modes the device may be used to form a temperature sensor (30) or a refractive index sensor (20). A second grating device (50) comprises two LPGs (56, 58) provided in PTL fibre (52) in a spaced relationship to form an in-line Mach-Zehnder interferometer (60). The second device (50) may also be used to form a temperature or refractive index sensor (70).
    • 一种包括渐进三层(PTL)光纤(22)的光波导光栅装置,其中设置有长周期光栅(LPG)(24)。 与包层模式相关的LPG的衰减谱带,直到23径向模式,特别是低于模态阶数(15)的包层模式对周围介质的折射率ns的变化基本上不敏感,但对温度敏感。 与大于26的包层模式相关的衰减带具有非零的折射率和温度依赖灵敏度参数。 通过适当选择包层模式,该装置可用于形成温度传感器(30)或折射率传感器(20)。 第二光栅装置(50)包括以间隔开的关系设置在PTL光纤(52)中的两个LPG(56,58),以形成在线马赫 - 曾德干涉仪(60)。 第二装置(50)也可用于形成温度或折射率传感器(70)。
    • 4. 发明申请
    • WATERBORNE POLYISOCYANATE COMPOSITION THAT PROVIDES A LOW FRICTION COATING
    • 提供低摩擦涂层的水性多异氰酸酯组合物
    • WO2012078923A2
    • 2012-06-14
    • PCT/US2011/064024
    • 2011-12-08
    • WEBB, David
    • WEBB, David
    • C09D7/12C08G18/32C09D175/00
    • C09D175/04C08G18/4833C08G18/6212C08G18/765
    • The present invention is a chemical composition that provides a low friction coating and a low sliding coefficient of friction onto a plastic or metal working part that includes a waterborne polyisocyanate such as ureas, urethanes or tetramethylxylene diisocyanates (TMXDI) in the composition structure and a plurality of cross linkable functional groups that include carboxyl groups and hydroxyl groups that are added utilizing plasma or chemical grafting and etching and a plastic or metal chemical substrate. The composition also includes one or more materials that are single linked or multiple linked hydrogels such as polyvinylpyrrolidone (PVP), polyethylene glycol (PEG) or polyvinyl alcohol (PVA) mixed with the polyisocynate and one or more crosslinkers such as aziridines or carbodiimides that link the hydrogels, the polyisocynate and the substrate together to form the composition.
    • 本发明是一种化学组合物,其在包括水性多异氰酸酯如尿素,聚氨酯或四甲基二甲苯二异氰酸酯(TMXDI)的塑料或金属加工部件上提供低摩擦涂层和低滑动摩擦系数 )和多个可交联官能团,所述可交联官能团包括利用等离子体或化学接枝和蚀刻而添加的羧基和羟基以及塑料或金属化学基材。 组合物还包括一种或多种与多聚异氰酸酯和一种或多种交联剂如氮丙啶或碳化二亚胺混合的单连接或多连接的水凝胶如聚乙烯吡咯烷酮(PVP),聚乙二醇(PEG)或聚乙烯醇(PVA) 水凝胶,聚异氰酸酯和底物一起形成组合物。