Field emission electron gun having automatic current control
US3936756A · kind A · utility
13Cited by
3References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 31, 1974 |
| Grant date | Feb 3, 1976 |
| Priority date | — |
| Expiry date | Jan 31, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J37/243
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An improved field emission type electron gun is automatically controlled so as to generate a stable emission current. The preferred embodiment employs a detecting means for detecting the emission current fluctuation and a control means for controlling the electric field for field emission according to the output signal of said detecting means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.