| 摘要 |
<p>The invention relates to a main electron lens for an inline electron gun, comprising a first, focusing electrode (G8) and a second, accelerating electrode (G9) which are equipped with optical plates (1, 2), each provided with a central hole (4, 7) and with two outer holes (3, 5 and 6, 8). The first optical plate (1) is placed at a first distance (L1) from the aperture (9) of the first electrode (G8) and the second optical plate (2) is placed at a second distance (L2) from the aperture (10) of the second electrode (G9). The ratio of the first and second distances (L1/L2) is determined by the formula: <DF>L1/L2 = A11( delta Vd)<2> + A1 delta Vd + A0 + C0 x Bias </DF> in which: A11, A1, A0 and C0 are constants; delta Vd is the variation in the focus voltage that it is desired for the system to have; and Bias is the bias that it is desired for the system to have. <??>Application: Cathode-ray tubes.</p> |
