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    Diode for providing X-rays
    61.
    发明授权
    Diode for providing X-rays 失效
    用于提供X射线的二极管

    公开(公告)号：US5020087A

    公开(公告)日：1991-05-28

    申请号：US434935

    申请日：1989-11-09

    Applicant: William H. Rix ,  John P. Shannon, deceased

    Inventor： William H. Rix ,  John P. Shannon, deceased

    IPC: H01J35/04

    CPC classification number: H01J35/04 ,  H01J2235/087

    Abstract: Diode for providing X-rays. A diode for generating X-rays is adapted for connection to a source of high electrical energy with the diode having a first end from which the X-rays are emitted, a second end, and axis extending between the ends. The diode includes a ring cathode connected to the electron source and an intermediate anode spaced from the cathode with at least a portion of this anode being disposed between the ring cathode and the diode first end. The intermediate anode decelerates electrons to cause the generation of X-rays emitted from the diode first end. The diode also includes an intermediate cathode disposed radially outwardly of the intermediate anode and connected to this anode. The diode further includes an inverse anode spaced from the intermediate cathode and positioned radially outwardly of the intermediate cathode and between the intermediate cathode and between the intermediate cathode and the diode second end. The inverse anode also decelerates electrons to cause the generation of X-rays emitted from the diode first end generally radially outwardly of the X-rays resulting from operation of the intermediate anode. The inverse anode is connected to ground so that the diode forms a pair of anode-cathode gaps in series to divide the energy of the electrons and to cause more uniform emission of X-rays from the diode first end.

    Abstract translation: 用于提供X射线的二极管。 用于产生X射线的二极管适于连接到高电能源，二极管具有从其出射X射线的第一端，第二端和在端部之间延伸的轴。 二极管包括连接到电子源的环形阴极和与阴极间隔开的中间阳极，该阳极的至少一部分设置在环形阴极和二极管第一端之间。 中间阳极使电子减速以产生从二极管第一端发射的X射线。 二极管还包括中间阳极，该中间阴极设置在中间阳极的径向外侧并与该阳极连接。 二极管还包括与中间阴极间隔开并且位于中间阴极的径向向外以及中间阴极之间以及中间阴极和二极管第二端之间的反向阳极。 反向阳极还使电子减速，从而产生从二极管第一端发射的X射线，其大体上径向向外由于中间阳极的操作产生的X​​射线。 反向阳极连接到地，使得二极管形成一对串联的阳极 - 阴极间隙，以分割电子的能量并且从二极管第一端引起更均匀的X射线发射。

    Omni-directional X-ray tube
    62.
    发明授权
    Omni-directional X-ray tube 失效
    全方位X射线管

    公开(公告)号：US5003568A

    公开(公告)日：1991-03-26

    申请号：US554963

    申请日：1990-07-20

    Applicant: Horst Steffel

    Inventor： Horst Steffel

    IPC: H01J35/04

    CPC classification number: H01J35/04

    Abstract: Omni-directional X-ray tube having a target which is at least partially surrounded by an annular window passed by the X-rays, the cathode and the electron optics and the targets being designed such that the radiation passing the window is sweeping a larger sector in the plane of the window. The cathode arrangement includes at least two electron sources with an associated electron optics. The formation of the electron optics and of the targets is such that for each electron optic a focal point is generated on the target and the radiation originating from the individual focal points are sweeping about adjacent subsectors which are approximately screened against each other to avoid an overlapping.

    Abstract translation: 全方位X射线管具有至少部分地被由X射线通过的环形窗口所围绕的目标，阴极和电子光学器件以及目标被设计成使得通过窗口的辐射扫掠较大的扇区 在窗口的飞机上。 阴极装置包括至少两个具有相关电子光学的电子源。 电子光学器件和目标物的形成使得对于每个电子光学元件，在目标上产生焦点，并且源自各个焦点的辐射围绕相邻的子部分进行扫描，这些相邻子部分彼此近似地被屏蔽以避免重叠 。

    X-ray tube device
    63.
    发明授权
    X-ray tube device 失效
    X射线管装置

    公开(公告)号：US4777642A

    公开(公告)日：1988-10-11

    申请号：US886674

    申请日：1986-07-18

    Applicant: Katsuhiro Ono

    Inventor： Katsuhiro Ono

    IPC: H01J35/04 ,  H01J35/06 ,  H01J35/14

    CPC classification number: H01J35/14 ,  H01J35/04 ,  H01J35/06

    Abstract: An X-ray tube has a cathode assembly for emitting an electron beam and an anode target facing this assembly in an evacuated envelope. The anode target defines a target surface that is slightly inclined to the electron beam axis and the direction in which it is inclined coincides with an X-ray irradiation direction. The cathode assembly comprises a flat cathode with a flat electron emission surface and a focussing electrode which focuses electrons emitted by the cathode. The cathode's electron emission surface is elongated and its long axis is coincident with the direction of X-ray irradiation. The focussing electrode possesses an axially symmetric opening with generally the same dimensions lengthways and crosswise. This gives an X-ray tube device in which the shape of the X-ray focal spot seen looking from the X-ray irradiation direction is substantially that of a circle or of a polygon, including a square, and it is possible to vary the size of the X-ray focal spot over a wide range while maintaining its long to short side ratio at 1.4 or less.

    Abstract translation: X射线管具有用于在真空的外壳中发射电子束的阴极组件和面向该组件的阳极靶。 阳极靶限定了与电子束轴稍微倾斜并且其倾斜方向与X射线照射方向一致的目标表面。 阴极组件包括具有平坦电子发射表面的平坦阴极和聚焦由阴极发射的电子的聚焦电极。 阴极的电子发射表面是细长的，其长轴与X射线照射的方向一致。 聚焦电极具有轴向对称的开口，其纵向和横向具有大致相同的尺寸。 这产生了X射线管装置，其中从X射线照射方向观察到的X射线焦点的形状基本上是圆形或包括正方形的多边形，并且可以改变 在宽范围内的X射线焦斑的尺寸，同时保持其长至短边比在1.4或更小。

    Small divergence x-ray tube
    65.
    发明授权
    Small divergence x-ray tube 失效
    小发散X射线管

    公开(公告)号：US4217517A

    公开(公告)日：1980-08-12

    申请号：US4558

    申请日：1979-01-18

    Applicant: Jacques Delair ,  Jacques Le Guen

    Inventor： Jacques Delair ,  Jacques Le Guen

    IPC: H01J35/00 ,  G21K1/02 ,  H01J35/04 ,  H01J35/14 ,  H01J35/26 ,  H01J35/06 ,  H01J35/10

    CPC classification number: G21K1/025 ,  H01J35/04 ,  H01J35/26

    Abstract: An x-ray tube providing a flat, fan-shaped uniform x-ray beam.The tube includes inside a vacuum glass envelope, a cathode or cathodes, a fixed or cylindrical rotating anode, and an anti-divergence diaphragm. The anti-divergence diaphragm has an opening, through which passes the beam. The walls of the opening have the shape of a sector of the fan-shaped beam in one plane (z-z'), and are flat in a perpendicular plane. A plurality of x-ray absorbing blades are positioned in the opening parallel to the fan-shaped side dividing the opening and the beam passing therethrough, thereby minimizing overall divergence of the beam. A plurality of cathodes may be used in the rotating anode tube, each separately focusable to provide beams of different intensity, and alternately operable.

    Abstract translation: 一个X射线管，提供一个扁平的，扇形均匀的x射线束。 该管包括在真空玻璃外壳内，阴极或阴极，固定或圆柱形的旋转阳极和反发散膜片。 防发散隔膜具有通过光束的开口。 开口的壁在一个平面（z-z'）中具有扇形梁的扇形的形状，并且在垂直平面上是平坦的。 多个x射线吸收叶片位于平行于扇形侧的开口中，该扇形边分开开口和穿过其中的光束，从而最小化光束的整体发散。 可以在旋转阳极管中使用多个阴极，每个阴极分别可聚焦以提供不同强度的光束，并且可交替地操作。

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