Systems and methods of all-optical Fourier phase contrast imaging using dye doped liquid crystals
    3.
    发明授权
    Systems and methods of all-optical Fourier phase contrast imaging using dye doped liquid crystals 有权
    使用染料掺杂液晶的全光傅里叶相位成像的系统和方法

    公开(公告)号:US07738047B2

    公开(公告)日:2010-06-15

    申请号:US11935910

    申请日:2007-11-06

    IPC分类号: G02F1/13

    摘要: Under one aspect, a phase contrast imaging system includes a coherent light source emitting a coherent beam directed toward a sample area; a lens arranged to collect at least part of the beam from the sample area; an element Fourier transforming the collected beam in a Fourier plane; a liquid crystal cell in the Fourier plane that transmits at least part of the transformed beam, wherein the cell includes liquid crystal molecules having a phase transition temperature, and wherein at temperatures exceeding the phase transition temperature, light transmitted through the liquid crystal molecules obtains a different phase than light transmitted through the liquid crystal molecules obtains at temperatures below the phase transition temperature; and an element inversely Fourier transforming the transmitted beam to provide an image. Part of the transformed beam has an intensity sufficient to heat a portion of the liquid crystal molecules above the phase transition temperature.

    摘要翻译: 在一个方面,相位对比成像系统包括发射朝向样本区域的相干光束的相干光源; 透镜,布置成从样品区域收集至少一部分光束; 在傅立叶平面中傅里叶变换收集的光束的元素; 透射至少部分变换束的傅立叶平面中的液晶单元,其中,所述单元包括具有相变温度的液晶分子,并且其中在超过相变温度的温度下,透过液晶分子的光获得 不同于透过液晶分子的光在低于相变温度的温度下获得; 以及将透射光束逆傅立叶变换以提供图像的元素。 变换束的一部分具有足以将一部分液晶分子加热到相转变温度以上的强度。