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    • 5. 发明授权
    • Electron gun for television camera tube
    • 电子枪电视摄像机管
    • US4540916A
    • 1985-09-10
    • US437335
    • 1982-10-28
    • Masanori MaruyamaMasakazu FukushimaShinichi KatoChihaya Ogusu
    • Masanori MaruyamaMasakazu FukushimaShinichi KatoChihaya Ogusu
    • H01J29/48H01J29/46H01J29/56
    • H01J29/488
    • An electron gun for a television camera tube comprises a cathode for emission of electrons, a first grid disposed subsequently to the cathode and having a first aperture supplied with a positive voltage relative to the cathode, a second grid disposed subsequently to the first grid and having a second aperture supplied with a higher positive voltage than that supplied to the first grid, and an intermediate grid interposed between the first and second grids and having a hole. The intermediate grid forms a divergent electron lens near the first aperture between the first and second grids. An electron beam having passed through the first aperture is once diverged by the divergent electron lens to form a crossover at an axial position of the gun which is remote from the first grid and at which the potential on the beam axis is high, whereby broadening of the width of the velocity distribution of extracted electrons can be suppressed to a minimum and the amount of beam current passing through the second aperture can be increased.
    • 一种用于电视摄像机管的电子枪包括用于发射电子的阴极,设置在阴极附近并具有相对于阴极提供正电压的第一孔径的第一栅极,以及随后设置在第一栅极上的第二栅极, 提供具有比提供给第一格栅的正电压高的正电压的第二孔,以及插入在第一栅极和第二栅极之间并具有孔的中间栅格。 中间栅格在第一和第二栅极之间的第一孔附近形成发散电子透镜。 已经通过第一孔的电子束一旦被发散的电子透镜分开,在枪的轴向位置处形成一个与第一格栅远离的轴的交叉点,并且在该轴处的波束轴上的电位高,从而使 提取的电子的速度分布的宽度可以被抑制到最小,并且可以增加通过第二孔径的束流的量。
    • 9. 发明授权
    • Television camera tube device
    • 电视摄像管设备
    • US4682077A
    • 1987-07-21
    • US755014
    • 1985-07-15
    • Masanori MaruyamaMasamichi MoriyaShinichi KatoMasakazu FukushimaYasuhiko NonakaChihaya Ogusu
    • Masanori MaruyamaMasamichi MoriyaShinichi KatoMasakazu FukushimaYasuhiko NonakaChihaya Ogusu
    • H01J29/46H01J29/48H01J29/52H04N5/228
    • H01J29/488
    • A camera tube device for use in a television camera comprises an electron gun including a cathode electrode for emission of an electron beam, and first and second grid electrodes respectively having apertures for controlling the diameter of the electron beam. The aperture of the second grid electrode is sufficiently smaller than the aperture of the first grid electrode. The first grid electrode is applied with a positive voltage relative to the cathode electrode and the second grid electrode is applied with a positive voltage relative to the cathode electrode which is higher than that applied to the first grid electrode. The positive voltage applied to the first grid electrode has such a value that forms the electron beam having passed through the aperture of the first grid electrode into a laminar flow beam. As the level of brightness of the object increases, the positive voltage applied to the first grid electrode is decreased to increase the amount of electron beam passing through the aperture of the second grid electrode.
    • 用于电视摄像机的相机管装置包括电子枪,其包括用于发射电子束的阴极,以及分别具有用于控制电子束直径的孔的第一和第二栅电极。 第二栅电极的孔径比第一栅电极的孔径小得多。 第一栅电极相对于阴极被施加正电压,并且第二栅极施加相对于阴极的正电压,其高于施加到第一栅电极的正电压。 施加到第一栅电极的正电压具有这样的值,其形成已经通过第一栅电极的孔的电子束成层流束。 当物体的亮度水平增加时,施加到第一栅极的正电压减小,以增加通过第二栅电极的孔径的电子束的量。