| 摘要 |
PURPOSE:To decrease influence of EME noises by acting the composite magnetic field of the respective magnetic fields generated by the current flowing in 1st and 2nd harnesses and the composite magnetic field of the magnetic field generated by the current flowing in the 3rd harness part and the magnetic field generated by tube current in reverse directions on the outside. CONSTITUTION:The composite magnetic field H25 formed in the central part of the plane P1 made by the central axis 5 of the fluorescent tube 1 and the 1st harness 2 and the composite magnetic field H34 formed in the central part of the plane P2 made by the 2nd and 3rd harnesses 3, 4 are nearly reversed in direction in terms of vector so that the magnetic fields H25, H34 act in nearly the reverse directions on the outside. The composite magnetic field H23 formed in the central part of the plane P5 made by the 1st and 2nd harnesses 3, 4 and the composite magnetic field H45 formed in the central part of the plane P6 made by the 3rd harness 4 and the central axis 5 of the fluorescent tube 1 are not completely reversed in direction in terms of vector but have the tendency to the reversion in the direction. The respective composite magnetic fields are offset with respect to the outside by the effect thereof on the outside of the copying machine. |
