| 摘要 |
<p>The envelope has a front wall with a phosphor screen on its inner surface. An electron gun generates at least one electron beam and guides it along a path parallel to the front wall. A guiding focussing device extends along the whole length of the beam path. It applies electrostatic forces to the beam electrons which hold them together, and has deflectors diverting the beam to the screen. It has further devices (40) which selectively bend the beam to the front wall (18) at certain points of its path so that it (50a) falls on the screen (28) at a first group of points, and again it (50b) falls on the screen at a second group of points each of which lies between two points of the first group.</p> |
