| 摘要 |
<p>An electron gun device includes an electron gun having an electron emitter (51), and at least two focus electrodes (54, 55) for forming an electron lens for focusing and accelerating electron beams emitted from the electron emitter, a voltage applying unit (70) for applying an AC voltage to at least one of the focus electrodes through a lead pin (91, 92) connected to the focus electrodes, and a voltage drop unit (100) for reducing the AC voltage applied from the voltage applying unit to one of the focus electrodes to apply the reduced voltage to the lead pin connected to the other focus electrode.</p> |
