Input screen scintillator for an X-ray image intensifier tube and
manufacturing process of this scintillator
    1.
    发明授权
    Input screen scintillator for an X-ray image intensifier tube and manufacturing process of this scintillator 失效
    用于X射线图像增强管的输入屏幕闪烁体和该闪烁体的制造过程

    公开(公告)号:US4980561A

    公开(公告)日:1990-12-25

    申请号:US295391

    申请日:1989-01-10

    CPC分类号: H01J9/12 H01J29/385

    摘要: The invention concerns an input screen scintillator for an X-ray image intensifier tube. This tube comprises light-conductive cesium iodide needles formed on an electrically conductive substrate. According to the invention, each needle is entirely coated with a material such as a metal or a semiconductor which reflects the light travelling within the needles and allows an identical potential level in the coating material as in the substrate towards the inside of said needles. The coating can enhance the efficiency and resolution of image intensifier tubes. The invention has applications in the field of X-ray imagery.

    摘要翻译: 本发明涉及用于X射线图像增强管的输入屏幕闪烁体。 该管包括形成在导电基底上的导光铯碘化物针。 根据本发明,每个针完全涂覆有诸如金属或半导体的材料,其反射在针内行进的光,并且允许涂层材料中与底物中相同的电位水平朝向所述针的内部。 涂层可以提高图像增强管的效率和分辨率。 本发明在X射线成像领域有应用。

    Input screen of a radiographic image intensifying tube having a radially
variable thickness intermediary layer
    3.
    发明授权
    Input screen of a radiographic image intensifying tube having a radially variable thickness intermediary layer 失效
    具有径向可变厚度中间层的射线照相图像增强管的输入屏幕

    公开(公告)号:US5256870A

    公开(公告)日:1993-10-26

    申请号:US840770

    申请日:1992-02-24

    IPC分类号: H01J29/38 H01J31/50

    CPC分类号: H01J29/385

    摘要: An image intensifying tube, such as a image intensifying tube which converts X-rays into a visible image, comprises a curved input screen which comprises a substrate that receives input radiation and a photocathode supported on the substrate, and an output screen which converts the electrons emitted by the photocathode into a visible image. In order to compensate for changes in luminosity due to the curvature of the input screen, an intermediary layer of radially variable thickness is deposited between the substrate and the photocathode. The intermediary layer is made from a material, such as indium oxide (In.sub.2 O.sub.3), which modifies the electron emitting characteristics of the photocathode as a function of the thickness the intermediary layer. Thus, a thicker intermediary layer near the center of the input screen will compensate for reduced luminosity at the edges of the screen.

    摘要翻译: 图像增强管,例如将X射线转换成可视图像的图像增强管,包括弯曲输入屏幕,其包括接收输入辐射的基板和支撑在基板上的光电阴极,以及输出屏幕,其转换电子 由光电阴极发射成可见图像。 为了补偿由于输入屏幕的曲率引起的亮度变化,可以在衬底和光电阴极之间沉积径向可变厚度的中间层。 中间层由诸如氧化铟(In 2 O 3)的材料制成,其将作为中间层的厚度的函数改变光电阴极的电子发射特性。 因此,靠近输入屏幕中心的较厚的中间层将补偿屏幕边缘处的降低的亮度。

    Input screen for radiological image intensifier tube utilizing an
anti-reflecting layer
    4.
    发明授权
    Input screen for radiological image intensifier tube utilizing an anti-reflecting layer 失效
    用于放射图像增强管的输入屏幕,使用反反射层

    公开(公告)号:US5146076A

    公开(公告)日:1992-09-08

    申请号:US640386

    申请日:1991-01-23

    CPC分类号: H01J29/385 G01J1/28 G01T1/28

    摘要: An input screen for radiological image intensifier tube that includes a scintillator (12), deposited on an aluminum substrate (10), which converts incident X-photons into visible photons which then go on to excite a photocathode (16). Previously, the luminous photons produced by the scintillator were emitted towards and were reflected by the aluminum layer; but this reflection reduces the resolution. According to the invention, in order to suppress this reflection, an input screen--in which a thin layer (20), transparent or slightly absorbent to the wavelengths emitted by the scintillator and or size to cause an anti-reflecting effect--is interposed between the aluminum substrate and the scintillator. Choices of anti-reflecting slightly absorbent layer include indium oxide, or alternatively antimony, tin or bismuth oxide, or a combination of these oxides, such as indium-tin oxide. The thickness is from a few hundred to a few thousand angstroms.

    摘要翻译: PCT No.PCT / FR90 / 00340 Sec。 371日期1991年1月23日 102(e)日期1991年1月23日PCT提交1990年5月15日PCT公布。 WO90 / 15432 PCT出版物 日期1990年12月13日。一种用于放射图像增强管的输入屏幕,其包括沉积在铝基板(10)上的闪烁体(12),其将入射的X光子转换成可见光子,然后继续激发光电阴极( 16)。 以前,由闪烁体产生的发光光子向铝层发射并被铝层反射; 但这种反射降低了分辨率。 根据本发明,为了抑制这种反射,对于由闪烁器发射的波长透明或稍微吸收的薄层(20)或者引起防反射效应的尺寸的输入屏(20)插入在其中, 铝基板和闪烁体。 抗反射轻微吸收层的选择包括氧化铟,或者锑,锡或氧化铋,或这些氧化物的组合,例如氧化铟锡。 厚度从几百到几千埃。