X-ray examination apparatus with x-ray filter
    1.
    发明授权
    X-ray examination apparatus with x-ray filter 失效
    带X射线滤镜的X线检查仪

    公开(公告)号:US5768340A

    公开(公告)日:1998-06-16

    申请号:US800250

    申请日:1997-02-13

    CPC分类号: G21K1/10

    摘要: An X-ray examination apparatus includes an X-ray filter with a plurality of filter elements for locally attenuating the X-ray beam. The X-ray absorptivity of each filter element is controlled by the amount of X-ray absorbing liquid with which the filter element is filled. The filling of filter elements is controlled by a voltage. The X-ray absorbing liquid contains a suspension of very small X-ray absorbing particles.

    摘要翻译: X射线检查装置包括具有用于局部衰减X射线束的多个滤波器元件的X射线滤波器。 每个过滤元件的X射线吸收率由填充有过滤元件的X射线吸收液的量来控制。 过滤元件的填充由电压控制。 X射线吸收液含有非常小的X射线吸收粒子的悬浮液。

    Low-temperature cathode having an emissive nanostructure
    6.
    发明授权
    Low-temperature cathode having an emissive nanostructure 失效
    具有发射纳米结构的低温阴极

    公开(公告)号:US5866975A

    公开(公告)日:1999-02-02

    申请号:US643089

    申请日:1996-04-30

    摘要: An electric discharge tube or discharge lamp, in particular a flat-panel display screen, includes one or more low-temperature cathodes having a holder, which, optionally, is provided with a heating or cooling element, a conductive bottom layer which is applied to the holder, optionally a substrate with dispenser material, and a top coating of ultrafine particles having a nanostructure. The top coating has a surface layer consisting of an emitter complex formed from an emission material comprising several components. The cathodes have a high reliability and a long service life under a normal working load. The emission is stable, which contributes to a constant picture quality throughout the life of the discharge lamp or discharge tube. The discharge tubes or discharge lamps in accordance with the invention have short switching times and the advantage that their construction has been simplified and that their energy consumption is low. A method of manufacturing low-temperature cathodes in accordance with the invention is described.

    摘要翻译: 放电管或放电灯,特别是平板显示屏,包括一个或多个具有保持器的低温阴极,该保持器任选地设置有加热或冷却元件,导电底层被施加到 保持器,任选地具有分配器材料的基底和具有纳米结构的超细颗粒的顶部涂层。 顶部涂层具有由由包含若干组分的发射材料形成的发射体复合体组成的表面层。 阴极在正常工作负荷下具有高可靠性和长使用寿命。 发射是稳定的,这有助于在放电灯或放电管的整个寿命期间恒定的图像质量。 根据本发明的放电管或放电灯具有短的开关时间,并且其结构简化并且其能量消耗低的优点。 对本发明的低温阴极的制造方法进行说明。

    Controllable thermionic electron emitter
    10.
    发明授权
    Controllable thermionic electron emitter 失效
    可控热电子发射器

    公开(公告)号:US5735720A

    公开(公告)日:1998-04-07

    申请号:US814685

    申请日:1997-03-11

    CPC分类号: H01J9/04 H01J1/16 H01J3/027

    摘要: The invention relates to a controllable thermionic electron emitter for vacuum tubes, which comprises an emitter layer (3, 27) and a control layer (5) which is separated from the emitter layer by an insulating layer (4), with the insulating layer and the control layer being manufactured by a deposition process. Also when its dimensions are small, such an electron emitter can be dimensionally accurately manufactured. All functional elements of the controllable thermionic electron emitter, more particularly control layer(s) (5, 7, 22, 24), emitter layer (3, 27) and separating insulating layers (2, 4, 6, 21, 23, 25) are successively deposited on a substrate (1, 20) in the direction of growth, in such a manner that the layers adhere to each other via solid boundary layers. In operation and, in particular, when the temperature varies, the dimensional accuracy of the electron emitter is preserved within narrow limits, and said electron emitter has a long service life.

    摘要翻译: 本发明涉及一种用于真空管的可控制的热离子电子发射器,其包括发射极层(3,37)和控制层(5),其通过绝缘层(4)与发射极层分离,绝缘层和 控制层通过沉积工艺制造。 此外,当其尺寸小时,可以尺寸精确地制造这样的电子发射器。 可控热电子发射器的所有功能元件,更具体地说是控制层(5,7,22,24),发射极层(3,27)和分离绝缘层(2,4,6,21,23,25) )沿着生长方向依次沉积在基板(1,20)上,使得这些层通过固体边界层彼此粘合。 在操作中,特别是当温度变化时,电子发射体的尺寸精度保持在极限范围内,并且所述电子发射体具有较长的使用寿命。