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    • 2. 发明公开
    • Magnetic focusing lens for a cathode ray tube
    • Magnetische FokussierlinsefüreineKathodenstrahlröhre。
    • EP0281190A1
    • 1988-09-07
    • EP88200334.6
    • 1988-02-24
    • Philips Electronics N.V.
    • Spanjer, Tjerk Gerrit
    • H01J29/68
    • H01J29/68
    • A magnetic ray tube comprises in a glass envelope 1 which consists of a display window 2, a cone 3 and a neck 4, an electron gun 5 in said neck 4 for generating an electron beam 6. The electron beam 6 is focused by a magnetic focusing lens 12 consisting of two non-identical magnets 13 and 14 which are assembled at the neck 4. The magnetic field of said magnetic focusing lens is essentially asymmetrical with respect to the centre of the lens and the magnetic fields of the magnets attenuate each other more strongly in the space where the electron beam is deflected than on the other side of the focusing lens.
    • 磁光管包括在玻璃外壳1中,玻璃外壳1由显示窗2,锥体3和颈部4组成,电子枪5在所述颈部4中用于产生电子束6.电子束6被磁性 聚焦透镜12由组合在颈部4处的两个不相同的磁体13和14组成。所述磁聚焦透镜的磁场相对于透镜的中心基本上是不对称的,并且磁体的磁场相互衰减 在电子束偏转的空间中比在聚焦透镜的另一侧更强烈。