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    High contrast PDLC transmission gratings and method of manufacture
    1.
    发明授权
    High contrast PDLC transmission gratings and method of manufacture 失效

    公开(公告)号：US06654072B2

    公开(公告)日：2003-11-25

    申请号：US10021329

    申请日：2001-10-30

    申请人： John C. Kralik ,  Michelle M. Stone

    发明人： John C. Kralik ,  Michelle M. Stone

    IPC分类号： G02F11335

    CPC分类号： G02F1/31 ,  G02F1/13342 ,  G02F2201/305

    摘要： A PDLC transmissive phase grating utilizing nematic liquid crystal materials confined in a polymer matrix. The PDLC grating operates in the Bragg regime and switches between diffracting and non-diffracting states via an applied electric field. The grating is made up of a PDLC grating film contained within a cell. The PDLC film has a spatially periodic distribution of grating planes which includes polymer-rich regions and liquid crystal-rich regions, wherein the major constituent of the polymer-rich regions is a polymer, and wherein the liquid crystal constituent concentration within the liquid crystal-rich regions is greater than the liquid crystal constituent concentration within said polymer-rich regions. The PDLC transmission phase grating is rendered substantially transparent when subjected to an electric field during the application of light that is p-polarized and incident on the grating at Bragg angle.

    Compact optical switches
    4.
    发明授权
    Compact optical switches 失效
    紧凑型光开关

    公开(公告)号：US06947627B2

    公开(公告)日：2005-09-20

    申请号：US10675277

    申请日：2003-09-30

    申请人： Thomas A. Mitchell ,  Michelle M. Stone

    发明人： Thomas A. Mitchell ,  Michelle M. Stone

    IPC分类号： G02B6/255 ,  G02B6/26 ,  G02B6/34 ,  G02B6/35 ,  G02B6/38 ,  G02B6/42

    CPC分类号： G02B6/2552 ,  G02B6/29311 ,  G02B6/29314 ,  G02B6/3556 ,  G02B6/3846

    摘要： Systems and methods to provide compact, scalable, low loss optical switches. An optical switch of this invention includes two or more directing elements, each directing element having two or more sections. Each section includes a switchable deviating element. During operation of a two element optical switch of this invention, the first section of the first element can selectively deviate in a first direction the input beam for that section. The second section of the first element can selectively deviate in a second direction the input beam for that section. The optical beams transmitted by the first element constitute the input beams for the second element. The first section of the second element can selectively deviate in a third direction, which can be the same as the first or second direction, the input beam for that section. The second section of the second element can selectively deviate in a fourth direction, which can be the same as the first or second direction, the input beam for that section. By selecting the relationship between the third direction and the first or second direction and the relationship between the fourth direction and the first or second direction, different designs are obtained. Also, multiple input switches can be obtained by either repeating the first section for half of multiple inputs followed by repeated second sections (also refereed to as a segmented design) or by interleaving first and second sections.

    摘要翻译： 提供紧凑，可扩展，低损耗光开关的系统和方法。 本发明的光开关包括两个或多个引导元件，每个引导元件具有两个或更多个部分。 每个部分包括一个可切换的偏移元件。 在本发明的双元件光开关的操作期间，第一元件的第一部分可以在第一方向上选择性地偏离该部分的输入光束。 第一元件的第二部分可以在第二方向上选择性地偏离该部分的输入光束。 由第一元件发射的光束构成用于第二元件的输入光束。 第二元件的第一部分可以在与第一或第二方向相同的第三方向上选择性地偏离该部分的输入光束。 第二元件的第二部分可以选择性地偏离与该部分的输入光束相同的第一方向或第二方向的第四方向。 通过选择第三方向和第一或第二方向之间的关系以及第四方向与第一或第二方向之间的关系，获得不同的设计。 此外，可以通过对多个输入的一半重复第一部分，随后重复的第二部分（也被称为分段设计）或通过交错第一和第二部分来获得多个输入开关。