Title:
【発明の名称】電子銃
Document Type and Number:
Japanese Patent JP3322183
Kind Code:
B2
Abstract:
An electron gun provides an improved focusing characteristic of electron beams surely and effectively, and permits position alignment to be relatively easy in assembling thereof. In an electron gun which includes a cathode for discharging electrons and a plurality of grids each having electron passing-through holes for guiding the electrons discharged from the cathode unidirectionally, an electron dischargeable region is formed in an electron discharging plane of the cathode, which is band-shaped. In addition, the length of the band-shaped area constituting the electron dischargeable region on its shorter side is less than 80% of the diameter of the area from where electrons are discharged when a practical maximum current is taken out without limiting the electron dischargeable region.
Inventors:
Tetsuya Shiraishi
Application Number:
JP26369197A
Publication Date:
September 09, 2002
Filing Date:
September 29, 1997
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H01J1/20; H01J3/02; H01J29/04; H01J37/065; (IPC1-7): H01J1/20; H01J37/065
Domestic Patent References:
| JP785807A | ||||
| JP6047332A |
Attorney, Agent or Firm:
Kaneo Miyata (1 person outside)