X-ray to visible image converter with a cathode emission layer having
non-uniform density profile structure
    4.
    发明授权
    X-ray to visible image converter with a cathode emission layer having non-uniform density profile structure 失效
    具有不均匀密度分布结构的阴极发射层的X射线至可见光转换器

    公开(公告)号:US5225670A

    公开(公告)日:1993-07-06

    申请号:US665474

    申请日:1991-03-06

    IPC分类号: G01T1/28 H01J1/34 H01J31/50

    摘要: High quantum efficiency (.gtoreq.5%) ultrafast (.ltoreq.100 picosecond) and broad band (30 KeV to 80 KeV for medical application) X-ray photo-electron cathode, high gain X-ray real time image intensifier and portable low intensity real time projection type X-ray imagescope use new vacuum photo-electron devices. A new type X-ray photo-electron cathode has a specially designed alkali halide electron emission layer that makes possible high quantum efficiency, high speed and broad band X-ray photon detection. An X-ray photo-electron cathode followed by a direct coupled micro channel plate and an output phosphor display screen form a new type panel shaped direct view X-ray intensifier tube which can have both high spatial resolution (.gtoreq.10 lp/mm) and high gain (.gtoreq.10.sup.4). The thickness of this panel shaped disc X-ray intensifier can be less than 1 cm. A portable real time projection X-ray imagescope which employs this new type X-ray intensifier and other devices (small x-ray tube, small built-in high voltage power supply) can be widely used for medical, industrial and security applications.

    摘要翻译: 超高速( / = 5%)X射线光电子阴极,高增益X射线实时图像增强器和便携式 低强度实时投影型X射线图像摄影机采用新型真空光电子器件。 新型X射线光电子阴极具有特别设计的碱卤化物电子发射层,可以实现高量子效率,高速和宽带X射线光子检测。 随后是直接耦合的微通道板和输出磷光体显示屏的X射线光电子阴极形成新型的面板式直视X射线增强管,其可以具有高空间分辨率(> / = 10lp / mm )和高增益(> / = 104)。 该板状盘片X射线增强器的厚度可以小于1cm。 采用这种新型X射线增强器和其他器件(小型X射线管,小型内置高压电源)的便携式实时投影X射线图像摄影机可广泛应用于医疗,工业和安全应用。