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    • 8. 发明申请
    • OPTICAL-CAVITY PHASE PLATE FOR TRANSMISSION ELECTRON MICROSCOPY
    • 用于传输电子显微镜的光学相位板
    • US20130037712A1
    • 2013-02-14
    • US13487831
    • 2012-06-04
    • Robert GLAESERJian JinRadostin DanevHolger MuellerJohn Spence
    • Robert GLAESERJian JinRadostin DanevHolger MuellerJohn Spence
    • H01J37/22
    • H01J37/26H01J2237/2482H01J2237/2614
    • An optical phase plate system and method for enhancing phase contrast in electron beam imaging includes a transmission electron microscope (TEM) having a back focal plane; an optical cavity having a high internal surface reflectance, the center of the optical cavity located at the back focal plane of the TEM, the optical cavity having first and second ports arranged oppositely along a symmetrical axis of the optical cavity to admit an electron beam provided by the TEM through the first port to pass through and focus at the center of the optical cavity, and to exit through the second port, and wherein the optical cavity further has an optical port on an axis transverse to and intersecting the electron beam axis to admit a laser beam; a laser coupled to the optical cavity to provide a laser beam of a selected wavelength to enter the optical cavity through the optical port, wherein the laser beam is multiply reflected from the high internal surface reflectance to provide a high intensity standing wave optical phase plate focused at the back focal plane of the TEM to cause a modulation of the electron beam; and an image plane of the TEM placed opposite the second port of the optical cavity to receive the electron beam modulated by the high intensity standing wave optical phase plate.
    • 用于增强电子束成像中的相位差的光学相位板系统和方法包括具有后焦平面的透射电子显微镜(TEM) 具有高内表面反射率的光学腔,光腔的中心位于TEM的后焦平面处,光腔具有沿着光腔的对称轴线相对布置的第一和第二端口,以允许提供的电子束 通过TEM通过第一端口通过并聚焦在光腔的中心,并且通过第二端口离开,并且其中光学腔还具有横向于电子束轴线和与电子束轴线交叉的轴线上的光学端口 承认激光束; 激光器,其耦合到光腔以提供选定波长的激光束以通过光学端口进入光腔,其中激光束从高内表面反射率反射,以提供高强度驻波光相位板聚焦 在TEM的后焦平面处引起电子束的调制; 以及与光腔的第二端口相对放置的TEM的像面,以接收由高强度驻波光学相位板调制的电子束。