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    Photomultiplier and detection systems
    21.
    发明授权
    Photomultiplier and detection systems 有权
    光电倍增管和检测系统

    公开(公告)号：US08993970B2

    公开(公告)日：2015-03-31

    申请号：US14082658

    申请日：2013-11-18

    Applicant: Rapiscan Systems, Inc.

    Inventor： Edward James Morton

    IPC: G01T1/161 ,  H01J43/30 ,  G01T1/167 ,  G01V5/00 ,  H01J43/08 ,  G01T3/06 ,  G01T1/16 ,  G01T1/208 ,  H01J40/04 ,  H01J43/18

    CPC classification number: H01J43/30 ,  G01T1/16 ,  G01T1/167 ,  G01T1/208 ,  G01T3/06 ,  G01V5/0025 ,  G01V5/0091 ,  H01J40/04 ,  H01J43/08 ,  H01J43/18

    Abstract: The invention provides a switchable photomultiplier switchable between a detecting state and a non-detecting state including a cathode upon which incident radiation is arranged to impinge. The photomultiplier also includes a series of dynodes arranged to amplify a current created at the cathode upon detection of photoradiation. The invention also provides a detection system arranged to detect radiation-emitting material in an object. The system includes a detector switchable between a detecting state in which the detector is arranged to detect radiation and a non-detecting state in which the detector is arranged to not detect radiation. The system further includes a controller arranged to control switching of the detector between the states such that the detector is switched to the non-detecting state while an external radiation source is irradiating the object.

    Abstract translation: 本发明提供了一种可切换的光电倍增器，其可在检测状态和非检测状态之间切换，包括入射辐射被布置成入射的阴极。 光电倍增管还包括一系列倍增电极，其布置成在检测到光辐射时放大阴极产生的电流。 本发明还提供了一种检测系统，用于检测物体中的辐射发射材料。 该系统包括可在检测器被布置成检测辐射的检测状态和检测器被布置为不检测辐射的非检测状态之间切换的检测器。 该系统还包括控制器，其被布置成控制检测器在状态之间的切换，使得当外部辐射源照射对象时，检测器切换到非检测状态。

    Electron-optical image tube
    23.
    发明授权
    Electron-optical image tube 失效
    电子光学图像管

    公开(公告)号：US4021693A

    公开(公告)日：1977-05-03

    申请号：US584968

    申请日：1975-06-09

    Applicant: Daniel Joseph Bradley ,  Wilson Sibbett

    Inventor： Daniel Joseph Bradley ,  Wilson Sibbett

    IPC: H01J31/50 ,  H01J40/04 ,  H01J40/16 ,  H01J39/04 ,  H01J39/00

    CPC classification number: H01J40/04 ,  H01J31/502 ,  H01J40/16

    Abstract: An electron-optical image tube including a photocathode, an extraction electrode consisting of a mesh on the emission side of the photocathode, and a focussing electrode on the side of the mesh remote from the photocathode, achieves increased time resolution, improved spatial resolution, and reduced magnification at a phosphor screen by making the photocathode to mesh spacing small compared with the mesh to focussing electrode spacing. An improved photocathode plate avoids large electric fields at sharp points on the photocathode surface. Additional annular electrodes and flared deflector electrodes in the drift section of the tube prevent scattering of electrons from the tube walls on to the screen.

    Abstract translation: 包括光电阴极的电子光学图像管，由光电阴极的发射侧上的网状物构成的引出电极和远离光电阴极的网侧的聚焦电极实现了时间分辨率提高，空间分辨率提高， 通过使光电阴极与网孔相比网眼间距小于聚焦电极间距，降低了荧光屏的倍率。 改进的光电阴极板避免了光电阴极表面尖锐点处的大电场。 在管的漂移部分中的额外的环形电极和扩张的偏转器电极防止电子从管壁散射到屏幕上。

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